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Source Code
Overview
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Contract Name:
DAOSpokeContract
Compiler Version
v0.8.23+commit.f704f362
Optimization Enabled:
Yes with 1 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import '@openzeppelin/contracts/utils/structs/Checkpoints.sol';
import '@openzeppelin/contracts/governance/utils/IVotes.sol';
import '@openzeppelin/contracts/utils/Address.sol';
import './MetaHumanGovernor.sol';
import './wormhole/IWormholeRelayer.sol';
import './wormhole/IWormholeReceiver.sol';
import './magistrate/Magistrate.sol';
/**
* @title DAOSpokeContract
* @dev DAOSpokeContract is a contract that handles voting and proposal functionality for a DAO spoke chain.
* It integrates with the MetaHumanGovernor contract for governance operations.
*/
contract DAOSpokeContract is IWormholeReceiver, Magistrate {
using Address for address payable;
error NotStartedVote();
error VoteFinished();
error VoteNotActive();
error VoteAlreadyCast();
error InvalidVoteType(uint8 support);
error OnlyRelayerAllowed();
error OnlyMessagesFromHub();
error MessageAlreadyProcessed();
error InvalidIntendedRecipient();
error ProposalIdMustBeUnique();
error VoteNotFinished();
error RelaySendFailed();
error ZeroBalance();
bytes32 public immutable hubContractAddress;
uint16 public immutable hubContractChainId;
IVotes public immutable token;
uint256 public immutable targetSecondsPerBlock;
IWormholeRelayer public immutable wormholeRelayer;
uint16 public immutable chainId;
uint256 internal constant GAS_LIMIT = 500_000;
mapping(uint256 => RemoteProposal) public proposals;
mapping(uint256 => ProposalVote) public proposalVotes;
mapping(bytes32 => bool) public processedMessages;
struct ProposalVote {
uint256 againstVotes;
uint256 forVotes;
uint256 abstainVotes;
mapping(address => bool) hasVoted;
}
enum VoteType {
Against,
For,
Abstain
}
struct RemoteProposal {
// Blocks provided by the hub chain as to when the local votes should start/finish.
uint256 proposalCreation;
uint256 localVoteStart;
uint256 localVoteEnd;
uint256 localVoteStartBlock;
bool voteFinished;
}
event VoteCast(
address indexed voter,
uint256 proposalId,
uint8 support,
uint256 weight,
string reason
);
/**
* @dev Contract constructor.
* @param _hubContractAddress The address of the hub contract.
* @param _hubContractChainId The chain ID of the hub contract.
* @param _token The address of the token contract used for voting.
* @param _targetSecondsPerBlock The target number of seconds per block for block estimation.
* @param _chainId The chain ID of the current contract.
* @param _wormholeRelayerAddress The address of the wormhole automatic relayer contract used for cross-chain communication.
* @param _magistrateAddress The initial magistrate address.
*/
constructor(
bytes32 _hubContractAddress,
uint16 _hubContractChainId,
IVotes _token,
uint256 _targetSecondsPerBlock,
uint16 _chainId,
address _wormholeRelayerAddress,
address _magistrateAddress
) {
_transferMagistrate(_magistrateAddress);
token = _token;
targetSecondsPerBlock = _targetSecondsPerBlock;
chainId = _chainId;
wormholeRelayer = IWormholeRelayer(_wormholeRelayerAddress);
hubContractAddress = _hubContractAddress;
hubContractChainId = _hubContractChainId;
}
function hasVoted(
uint256 proposalId,
address account
) public view virtual returns (bool) {
return proposalVotes[proposalId].hasVoted[account];
}
/**
* @dev Checks if a proposal exists.
* @param proposalId The ID of the proposal.
* @return A boolean indicating whether the proposal exists.
*/
function isProposal(uint256 proposalId) public view returns (bool) {
return proposals[proposalId].localVoteStart != 0;
}
/**
* @dev Casts a vote for a proposal.
* @param proposalId The ID of the proposal.
* @param support The vote type (0 - Against, 1 - For, 2 - Abstain).
* @return The voting weight of the voter.
*/
function castVote(
uint256 proposalId,
uint8 support
) public virtual returns (uint256) {
RemoteProposal storage proposal = proposals[proposalId];
if (!isProposal(proposalId)) revert NotStartedVote();
if (proposal.voteFinished) revert VoteFinished();
if (
!(block.timestamp >= proposal.localVoteStart &&
block.timestamp < proposal.localVoteEnd)
) revert VoteNotActive();
uint256 weight = token.getPastVotes(
msg.sender,
proposal.localVoteStart
);
_countVote(proposalId, msg.sender, support, weight);
emit VoteCast(msg.sender, proposalId, support, weight, '');
return weight;
}
/**
* @dev Internal function to count a vote for a proposal.
* @param proposalId The ID of the proposal.
* @param account The address of the voter.
* @param support The vote type (0 - Against, 1 - For, 2 - Abstain).
* @param weight The voting weight of the voter.
*/
function _countVote(
uint256 proposalId,
address account,
uint8 support,
uint256 weight
) internal virtual {
ProposalVote storage proposalVote = proposalVotes[proposalId];
if (proposalVote.hasVoted[account]) revert VoteAlreadyCast();
proposalVote.hasVoted[account] = true;
if (support == uint8(VoteType.Against)) {
proposalVote.againstVotes += weight;
} else if (support == uint8(VoteType.For)) {
proposalVote.forVotes += weight;
} else if (support == uint8(VoteType.Abstain)) {
proposalVote.abstainVotes += weight;
} else {
revert InvalidVoteType(support);
}
}
/**
* @dev Estimates what block number will be the current block on given timestamp.
* @return timestampToEstimate Timestamp to estimate the block for.
*/
function estimateBlockFromTimestamp(
uint256 timestampToEstimate
) internal view returns (uint256) {
uint256 currentTimestamp = block.timestamp;
uint256 currentBlock = block.number;
uint256 estimatedBlock = 0;
if (timestampToEstimate > currentTimestamp) {
//future
uint256 timeDifference = timestampToEstimate - currentTimestamp;
uint256 blockDifference = timeDifference / targetSecondsPerBlock;
estimatedBlock = currentBlock + blockDifference;
} else {
//past
uint256 timeDifference = currentTimestamp - timestampToEstimate;
uint256 blockDifference = timeDifference / targetSecondsPerBlock;
estimatedBlock = currentBlock - blockDifference;
}
return estimatedBlock;
}
/**
* @dev Sends the vote result of a proposal to the hub contract.
* @param proposalId The ID of the proposal.
* @return A boolean indicating whether the message was sent successfully.
*/
function _sendVoteResultToHub(uint256 proposalId) internal returns (bool) {
ProposalVote storage votes = proposalVotes[proposalId];
bytes memory messageToSend = abi.encode(
0,
proposalId,
votes.forVotes,
votes.againstVotes,
votes.abstainVotes
);
bytes memory payloadToSend = abi.encode(
hubContractAddress,
hubContractChainId,
msg.sender,
messageToSend
);
uint256 cost = quoteCrossChainMessage(hubContractChainId);
try
wormholeRelayer.sendPayloadToEvm{value: cost}(
hubContractChainId,
address(uint160(uint256(hubContractAddress))),
payloadToSend,
0,
GAS_LIMIT,
hubContractChainId,
magistrate()
)
{
return true;
} catch {
return false;
}
}
/**
* @dev Receives messages from the Wormhole protocol's relay mechanism and processes them accordingly.
* This function is intended to be called only by the designated Wormhole relayer.
* @param payload The payload of the received message.
* @param sourceAddress The address that initiated the message transmission (Hub contract address).
* @param sourceChain The chain ID of the source contract.
* @param deliveryHash A unique hash representing the delivery of the message to prevent duplicate processing.
*/
function receiveWormholeMessages(
bytes memory payload,
bytes[] memory, // additionalVaas
bytes32 sourceAddress,
uint16 sourceChain,
bytes32 deliveryHash
) public payable override {
if (msg.sender != address(wormholeRelayer)) revert OnlyRelayerAllowed();
if (
!(hubContractAddress == sourceAddress &&
hubContractChainId == sourceChain)
) revert OnlyMessagesFromHub();
if (processedMessages[deliveryHash]) revert MessageAlreadyProcessed();
(
address intendedRecipient, //chainId //sender
,
,
bytes memory decodedMessage
) = abi.decode(payload, (address, uint16, address, bytes));
if (intendedRecipient != address(this))
revert InvalidIntendedRecipient();
processedMessages[deliveryHash] = true;
uint16 option;
assembly {
option := mload(add(decodedMessage, 32))
}
if (option == 0) {
// Begin a proposal on the local chain, with local block times
(
,
//function selector
uint256 proposalId,
uint256 proposalCreationTimestamp,
uint256 voteStartTimestamp,
uint256 voteEndTimestamp
) = abi.decode(
decodedMessage,
(uint16, uint256, uint256, uint256, uint256)
);
if (isProposal(proposalId)) revert ProposalIdMustBeUnique();
proposals[proposalId] = RemoteProposal(
proposalCreationTimestamp,
voteStartTimestamp,
voteEndTimestamp,
estimateBlockFromTimestamp(voteStartTimestamp),
false
);
} else if (option == 1) {
(, uint256 proposalId) = abi.decode(
decodedMessage,
(uint16, uint256)
);
proposals[proposalId].voteFinished = true;
_sendVoteResultToHub(proposalId);
}
}
function sendVoteResultToHub(
uint256 proposalId
) public payable onlyMagistrate {
if (!proposals[proposalId].voteFinished) revert VoteNotFinished();
bool ok = _sendVoteResultToHub(proposalId);
if (!ok) revert RelaySendFailed();
}
/**
* @dev Withdraws the contract's balance to the magistrate address.
* Can only be called by the magistrate.
*/
function withdraw() external onlyMagistrate {
uint256 balance = address(this).balance;
if (balance == 0) revert ZeroBalance();
payable(msg.sender).sendValue(balance);
}
/**
* @dev Retrieves the quote for cross chain message delivery.
* @return cost Price, in units of current chain currency, that the delivery provider charges to perform the relay
*/
function quoteCrossChainMessage(
uint16 targetChain
) internal view returns (uint256 cost) {
(cost, ) = wormholeRelayer.quoteEVMDeliveryPrice(
targetChain,
0,
GAS_LIMIT
);
}
receive() external payable {}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol)
pragma solidity ^0.8.0;
import "./IAccessControlUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "../utils/StringsUpgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```solidity
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```solidity
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
* to enforce additional security measures for this role.
*/
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role);
_;
}
function __AccessControl_init() internal onlyInitializing {
}
function __AccessControl_init_unchained() internal onlyInitializing {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `_msgSender()` is missing `role`.
* Overriding this function changes the behavior of the {onlyRole} modifier.
*
* Format of the revert message is described in {_checkRole}.
*
* _Available since v4.6._
*/
function _checkRole(bytes32 role) internal view virtual {
_checkRole(role, _msgSender());
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view virtual {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
StringsUpgradeable.toHexString(account),
" is missing role ",
StringsUpgradeable.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*
* May emit a {RoleGranted} event.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*
* May emit a {RoleRevoked} event.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been revoked `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*
* May emit a {RoleRevoked} event.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* May emit a {RoleGranted} event.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*
* NOTE: This function is deprecated in favor of {_grantRole}.
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
/**
* @dev Grants `role` to `account`.
*
* Internal function without access restriction.
*
* May emit a {RoleGranted} event.
*/
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
/**
* @dev Revokes `role` from `account`.
*
* Internal function without access restriction.
*
* May emit a {RoleRevoked} event.
*/
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControlUpgradeable {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal onlyInitializing {
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal onlyInitializing {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (governance/extensions/GovernorSettings.sol)
pragma solidity ^0.8.0;
import "../GovernorUpgradeable.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";
/**
* @dev Extension of {Governor} for settings updatable through governance.
*
* _Available since v4.4._
*/
abstract contract GovernorSettingsUpgradeable is Initializable, GovernorUpgradeable {
uint256 private _votingDelay;
uint256 private _votingPeriod;
uint256 private _proposalThreshold;
event VotingDelaySet(uint256 oldVotingDelay, uint256 newVotingDelay);
event VotingPeriodSet(uint256 oldVotingPeriod, uint256 newVotingPeriod);
event ProposalThresholdSet(uint256 oldProposalThreshold, uint256 newProposalThreshold);
/**
* @dev Initialize the governance parameters.
*/
function __GovernorSettings_init(uint256 initialVotingDelay, uint256 initialVotingPeriod, uint256 initialProposalThreshold) internal onlyInitializing {
__GovernorSettings_init_unchained(initialVotingDelay, initialVotingPeriod, initialProposalThreshold);
}
function __GovernorSettings_init_unchained(uint256 initialVotingDelay, uint256 initialVotingPeriod, uint256 initialProposalThreshold) internal onlyInitializing {
_setVotingDelay(initialVotingDelay);
_setVotingPeriod(initialVotingPeriod);
_setProposalThreshold(initialProposalThreshold);
}
/**
* @dev See {IGovernor-votingDelay}.
*/
function votingDelay() public view virtual override returns (uint256) {
return _votingDelay;
}
/**
* @dev See {IGovernor-votingPeriod}.
*/
function votingPeriod() public view virtual override returns (uint256) {
return _votingPeriod;
}
/**
* @dev See {Governor-proposalThreshold}.
*/
function proposalThreshold() public view virtual override returns (uint256) {
return _proposalThreshold;
}
/**
* @dev Update the voting delay. This operation can only be performed through a governance proposal.
*
* Emits a {VotingDelaySet} event.
*/
function setVotingDelay(uint256 newVotingDelay) public virtual onlyGovernance {
_setVotingDelay(newVotingDelay);
}
/**
* @dev Update the voting period. This operation can only be performed through a governance proposal.
*
* Emits a {VotingPeriodSet} event.
*/
function setVotingPeriod(uint256 newVotingPeriod) public virtual onlyGovernance {
_setVotingPeriod(newVotingPeriod);
}
/**
* @dev Update the proposal threshold. This operation can only be performed through a governance proposal.
*
* Emits a {ProposalThresholdSet} event.
*/
function setProposalThreshold(uint256 newProposalThreshold) public virtual onlyGovernance {
_setProposalThreshold(newProposalThreshold);
}
/**
* @dev Internal setter for the voting delay.
*
* Emits a {VotingDelaySet} event.
*/
function _setVotingDelay(uint256 newVotingDelay) internal virtual {
emit VotingDelaySet(_votingDelay, newVotingDelay);
_votingDelay = newVotingDelay;
}
/**
* @dev Internal setter for the voting period.
*
* Emits a {VotingPeriodSet} event.
*/
function _setVotingPeriod(uint256 newVotingPeriod) internal virtual {
// voting period must be at least one block long
require(newVotingPeriod > 0, "GovernorSettings: voting period too low");
emit VotingPeriodSet(_votingPeriod, newVotingPeriod);
_votingPeriod = newVotingPeriod;
}
/**
* @dev Internal setter for the proposal threshold.
*
* Emits a {ProposalThresholdSet} event.
*/
function _setProposalThreshold(uint256 newProposalThreshold) internal virtual {
emit ProposalThresholdSet(_proposalThreshold, newProposalThreshold);
_proposalThreshold = newProposalThreshold;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[47] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (governance/extensions/GovernorTimelockControl.sol)
pragma solidity ^0.8.0;
import "./IGovernorTimelockUpgradeable.sol";
import "../GovernorUpgradeable.sol";
import "../TimelockControllerUpgradeable.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";
/**
* @dev Extension of {Governor} that binds the execution process to an instance of {TimelockController}. This adds a
* delay, enforced by the {TimelockController} to all successful proposal (in addition to the voting duration). The
* {Governor} needs the proposer (and ideally the executor) roles for the {Governor} to work properly.
*
* Using this model means the proposal will be operated by the {TimelockController} and not by the {Governor}. Thus,
* the assets and permissions must be attached to the {TimelockController}. Any asset sent to the {Governor} will be
* inaccessible.
*
* WARNING: Setting up the TimelockController to have additional proposers besides the governor is very risky, as it
* grants them powers that they must be trusted or known not to use: 1) {onlyGovernance} functions like {relay} are
* available to them through the timelock, and 2) approved governance proposals can be blocked by them, effectively
* executing a Denial of Service attack. This risk will be mitigated in a future release.
*
* _Available since v4.3._
*/
abstract contract GovernorTimelockControlUpgradeable is Initializable, IGovernorTimelockUpgradeable, GovernorUpgradeable {
TimelockControllerUpgradeable private _timelock;
mapping(uint256 => bytes32) private _timelockIds;
/**
* @dev Emitted when the timelock controller used for proposal execution is modified.
*/
event TimelockChange(address oldTimelock, address newTimelock);
/**
* @dev Set the timelock.
*/
function __GovernorTimelockControl_init(TimelockControllerUpgradeable timelockAddress) internal onlyInitializing {
__GovernorTimelockControl_init_unchained(timelockAddress);
}
function __GovernorTimelockControl_init_unchained(TimelockControllerUpgradeable timelockAddress) internal onlyInitializing {
_updateTimelock(timelockAddress);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165Upgradeable, GovernorUpgradeable) returns (bool) {
return interfaceId == type(IGovernorTimelockUpgradeable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Overridden version of the {Governor-state} function with added support for the `Queued` state.
*/
function state(uint256 proposalId) public view virtual override(IGovernorUpgradeable, GovernorUpgradeable) returns (ProposalState) {
ProposalState currentState = super.state(proposalId);
if (currentState != ProposalState.Succeeded) {
return currentState;
}
// core tracks execution, so we just have to check if successful proposal have been queued.
bytes32 queueid = _timelockIds[proposalId];
if (queueid == bytes32(0)) {
return currentState;
} else if (_timelock.isOperationDone(queueid)) {
return ProposalState.Executed;
} else if (_timelock.isOperationPending(queueid)) {
return ProposalState.Queued;
} else {
return ProposalState.Canceled;
}
}
/**
* @dev Public accessor to check the address of the timelock
*/
function timelock() public view virtual override returns (address) {
return address(_timelock);
}
/**
* @dev Public accessor to check the eta of a queued proposal
*/
function proposalEta(uint256 proposalId) public view virtual override returns (uint256) {
uint256 eta = _timelock.getTimestamp(_timelockIds[proposalId]);
return eta == 1 ? 0 : eta; // _DONE_TIMESTAMP (1) should be replaced with a 0 value
}
/**
* @dev Function to queue a proposal to the timelock.
*/
function queue(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) public virtual override returns (uint256) {
uint256 proposalId = hashProposal(targets, values, calldatas, descriptionHash);
require(state(proposalId) == ProposalState.Succeeded, "Governor: proposal not successful");
uint256 delay = _timelock.getMinDelay();
_timelockIds[proposalId] = _timelock.hashOperationBatch(targets, values, calldatas, 0, descriptionHash);
_timelock.scheduleBatch(targets, values, calldatas, 0, descriptionHash, delay);
emit ProposalQueued(proposalId, block.timestamp + delay);
return proposalId;
}
/**
* @dev Overridden execute function that run the already queued proposal through the timelock.
*/
function _execute(
uint256 /* proposalId */,
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) internal virtual override {
_timelock.executeBatch{value: msg.value}(targets, values, calldatas, 0, descriptionHash);
}
/**
* @dev Overridden version of the {Governor-_cancel} function to cancel the timelocked proposal if it as already
* been queued.
*/
// This function can reenter through the external call to the timelock, but we assume the timelock is trusted and
// well behaved (according to TimelockController) and this will not happen.
// slither-disable-next-line reentrancy-no-eth
function _cancel(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) internal virtual override returns (uint256) {
uint256 proposalId = super._cancel(targets, values, calldatas, descriptionHash);
if (_timelockIds[proposalId] != 0) {
_timelock.cancel(_timelockIds[proposalId]);
delete _timelockIds[proposalId];
}
return proposalId;
}
/**
* @dev Address through which the governor executes action. In this case, the timelock.
*/
function _executor() internal view virtual override returns (address) {
return address(_timelock);
}
/**
* @dev Public endpoint to update the underlying timelock instance. Restricted to the timelock itself, so updates
* must be proposed, scheduled, and executed through governance proposals.
*
* CAUTION: It is not recommended to change the timelock while there are other queued governance proposals.
*/
function updateTimelock(TimelockControllerUpgradeable newTimelock) external virtual onlyGovernance {
_updateTimelock(newTimelock);
}
function _updateTimelock(TimelockControllerUpgradeable newTimelock) private {
emit TimelockChange(address(_timelock), address(newTimelock));
_timelock = newTimelock;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[48] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (governance/extensions/GovernorVotesQuorumFraction.sol)
pragma solidity ^0.8.0;
import "./GovernorVotesUpgradeable.sol";
import "../../utils/CheckpointsUpgradeable.sol";
import "../../utils/math/SafeCastUpgradeable.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";
/**
* @dev Extension of {Governor} for voting weight extraction from an {ERC20Votes} token and a quorum expressed as a
* fraction of the total supply.
*
* _Available since v4.3._
*/
abstract contract GovernorVotesQuorumFractionUpgradeable is Initializable, GovernorVotesUpgradeable {
using CheckpointsUpgradeable for CheckpointsUpgradeable.Trace224;
uint256 private _quorumNumerator; // DEPRECATED in favor of _quorumNumeratorHistory
/// @custom:oz-retyped-from Checkpoints.History
CheckpointsUpgradeable.Trace224 private _quorumNumeratorHistory;
event QuorumNumeratorUpdated(uint256 oldQuorumNumerator, uint256 newQuorumNumerator);
/**
* @dev Initialize quorum as a fraction of the token's total supply.
*
* The fraction is specified as `numerator / denominator`. By default the denominator is 100, so quorum is
* specified as a percent: a numerator of 10 corresponds to quorum being 10% of total supply. The denominator can be
* customized by overriding {quorumDenominator}.
*/
function __GovernorVotesQuorumFraction_init(uint256 quorumNumeratorValue) internal onlyInitializing {
__GovernorVotesQuorumFraction_init_unchained(quorumNumeratorValue);
}
function __GovernorVotesQuorumFraction_init_unchained(uint256 quorumNumeratorValue) internal onlyInitializing {
_updateQuorumNumerator(quorumNumeratorValue);
}
/**
* @dev Returns the current quorum numerator. See {quorumDenominator}.
*/
function quorumNumerator() public view virtual returns (uint256) {
return _quorumNumeratorHistory._checkpoints.length == 0 ? _quorumNumerator : _quorumNumeratorHistory.latest();
}
/**
* @dev Returns the quorum numerator at a specific timepoint. See {quorumDenominator}.
*/
function quorumNumerator(uint256 timepoint) public view virtual returns (uint256) {
// If history is empty, fallback to old storage
uint256 length = _quorumNumeratorHistory._checkpoints.length;
if (length == 0) {
return _quorumNumerator;
}
// Optimistic search, check the latest checkpoint
CheckpointsUpgradeable.Checkpoint224 memory latest = _quorumNumeratorHistory._checkpoints[length - 1];
if (latest._key <= timepoint) {
return latest._value;
}
// Otherwise, do the binary search
return _quorumNumeratorHistory.upperLookupRecent(SafeCastUpgradeable.toUint32(timepoint));
}
/**
* @dev Returns the quorum denominator. Defaults to 100, but may be overridden.
*/
function quorumDenominator() public view virtual returns (uint256) {
return 100;
}
/**
* @dev Returns the quorum for a timepoint, in terms of number of votes: `supply * numerator / denominator`.
*/
function quorum(uint256 timepoint) public view virtual override returns (uint256) {
return (token.getPastTotalSupply(timepoint) * quorumNumerator(timepoint)) / quorumDenominator();
}
/**
* @dev Changes the quorum numerator.
*
* Emits a {QuorumNumeratorUpdated} event.
*
* Requirements:
*
* - Must be called through a governance proposal.
* - New numerator must be smaller or equal to the denominator.
*/
function updateQuorumNumerator(uint256 newQuorumNumerator) external virtual onlyGovernance {
_updateQuorumNumerator(newQuorumNumerator);
}
/**
* @dev Changes the quorum numerator.
*
* Emits a {QuorumNumeratorUpdated} event.
*
* Requirements:
*
* - New numerator must be smaller or equal to the denominator.
*/
function _updateQuorumNumerator(uint256 newQuorumNumerator) internal virtual {
require(
newQuorumNumerator <= quorumDenominator(),
"GovernorVotesQuorumFraction: quorumNumerator over quorumDenominator"
);
uint256 oldQuorumNumerator = quorumNumerator();
// Make sure we keep track of the original numerator in contracts upgraded from a version without checkpoints.
if (oldQuorumNumerator != 0 && _quorumNumeratorHistory._checkpoints.length == 0) {
_quorumNumeratorHistory._checkpoints.push(
CheckpointsUpgradeable.Checkpoint224({_key: 0, _value: SafeCastUpgradeable.toUint224(oldQuorumNumerator)})
);
}
// Set new quorum for future proposals
_quorumNumeratorHistory.push(SafeCastUpgradeable.toUint32(clock()), SafeCastUpgradeable.toUint224(newQuorumNumerator));
emit QuorumNumeratorUpdated(oldQuorumNumerator, newQuorumNumerator);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[48] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (governance/extensions/GovernorVotes.sol)
pragma solidity ^0.8.0;
import "../GovernorUpgradeable.sol";
import "../../interfaces/IERC5805Upgradeable.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";
/**
* @dev Extension of {Governor} for voting weight extraction from an {ERC20Votes} token, or since v4.5 an {ERC721Votes} token.
*
* _Available since v4.3._
*
* @custom:storage-size 51
*/
abstract contract GovernorVotesUpgradeable is Initializable, GovernorUpgradeable {
IERC5805Upgradeable public token;
function __GovernorVotes_init(IVotesUpgradeable tokenAddress) internal onlyInitializing {
__GovernorVotes_init_unchained(tokenAddress);
}
function __GovernorVotes_init_unchained(IVotesUpgradeable tokenAddress) internal onlyInitializing {
token = IERC5805Upgradeable(address(tokenAddress));
}
/**
* @dev Clock (as specified in EIP-6372) is set to match the token's clock. Fallback to block numbers if the token
* does not implement EIP-6372.
*/
function clock() public view virtual override returns (uint48) {
try token.clock() returns (uint48 timepoint) {
return timepoint;
} catch {
return SafeCastUpgradeable.toUint48(block.number);
}
}
/**
* @dev Machine-readable description of the clock as specified in EIP-6372.
*/
// solhint-disable-next-line func-name-mixedcase
function CLOCK_MODE() public view virtual override returns (string memory) {
try token.CLOCK_MODE() returns (string memory clockmode) {
return clockmode;
} catch {
return "mode=blocknumber&from=default";
}
}
/**
* Read the voting weight from the token's built in snapshot mechanism (see {Governor-_getVotes}).
*/
function _getVotes(
address account,
uint256 timepoint,
bytes memory /*params*/
) internal view virtual override returns (uint256) {
return token.getPastVotes(account, timepoint);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (governance/extensions/IGovernorTimelock.sol)
pragma solidity ^0.8.0;
import "../IGovernorUpgradeable.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";
/**
* @dev Extension of the {IGovernor} for timelock supporting modules.
*
* _Available since v4.3._
*/
abstract contract IGovernorTimelockUpgradeable is Initializable, IGovernorUpgradeable {
event ProposalQueued(uint256 proposalId, uint256 eta);
function __IGovernorTimelock_init() internal onlyInitializing {
}
function __IGovernorTimelock_init_unchained() internal onlyInitializing {
}
function timelock() public view virtual returns (address);
function proposalEta(uint256 proposalId) public view virtual returns (uint256);
function queue(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) public virtual returns (uint256 proposalId);
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.1) (governance/Governor.sol)
pragma solidity ^0.8.0;
import "../token/ERC721/IERC721ReceiverUpgradeable.sol";
import "../token/ERC1155/IERC1155ReceiverUpgradeable.sol";
import "../utils/cryptography/ECDSAUpgradeable.sol";
import "../utils/cryptography/EIP712Upgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import "../utils/math/SafeCastUpgradeable.sol";
import "../utils/structs/DoubleEndedQueueUpgradeable.sol";
import "../utils/AddressUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "./IGovernorUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Core of the governance system, designed to be extended though various modules.
*
* This contract is abstract and requires several functions to be implemented in various modules:
*
* - A counting module must implement {quorum}, {_quorumReached}, {_voteSucceeded} and {_countVote}
* - A voting module must implement {_getVotes}
* - Additionally, {votingPeriod} must also be implemented
*
* _Available since v4.3._
*/
abstract contract GovernorUpgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, EIP712Upgradeable, IGovernorUpgradeable, IERC721ReceiverUpgradeable, IERC1155ReceiverUpgradeable {
using DoubleEndedQueueUpgradeable for DoubleEndedQueueUpgradeable.Bytes32Deque;
bytes32 public constant BALLOT_TYPEHASH = keccak256("Ballot(uint256 proposalId,uint8 support)");
bytes32 public constant EXTENDED_BALLOT_TYPEHASH =
keccak256("ExtendedBallot(uint256 proposalId,uint8 support,string reason,bytes params)");
// solhint-disable var-name-mixedcase
struct ProposalCore {
// --- start retyped from Timers.BlockNumber at offset 0x00 ---
uint64 voteStart;
address proposer;
bytes4 __gap_unused0;
// --- start retyped from Timers.BlockNumber at offset 0x20 ---
uint64 voteEnd;
bytes24 __gap_unused1;
// --- Remaining fields starting at offset 0x40 ---------------
bool executed;
bool canceled;
}
// solhint-enable var-name-mixedcase
string private _name;
/// @custom:oz-retyped-from mapping(uint256 => Governor.ProposalCore)
mapping(uint256 => ProposalCore) private _proposals;
// This queue keeps track of the governor operating on itself. Calls to functions protected by the
// {onlyGovernance} modifier needs to be whitelisted in this queue. Whitelisting is set in {_beforeExecute},
// consumed by the {onlyGovernance} modifier and eventually reset in {_afterExecute}. This ensures that the
// execution of {onlyGovernance} protected calls can only be achieved through successful proposals.
DoubleEndedQueueUpgradeable.Bytes32Deque private _governanceCall;
/**
* @dev Restricts a function so it can only be executed through governance proposals. For example, governance
* parameter setters in {GovernorSettings} are protected using this modifier.
*
* The governance executing address may be different from the Governor's own address, for example it could be a
* timelock. This can be customized by modules by overriding {_executor}. The executor is only able to invoke these
* functions during the execution of the governor's {execute} function, and not under any other circumstances. Thus,
* for example, additional timelock proposers are not able to change governance parameters without going through the
* governance protocol (since v4.6).
*/
modifier onlyGovernance() {
require(_msgSender() == _executor(), "Governor: onlyGovernance");
if (_executor() != address(this)) {
bytes32 msgDataHash = keccak256(_msgData());
// loop until popping the expected operation - throw if deque is empty (operation not authorized)
while (_governanceCall.popFront() != msgDataHash) {}
}
_;
}
/**
* @dev Sets the value for {name} and {version}
*/
function __Governor_init(string memory name_) internal onlyInitializing {
__EIP712_init_unchained(name_, version());
__Governor_init_unchained(name_);
}
function __Governor_init_unchained(string memory name_) internal onlyInitializing {
_name = name_;
}
/**
* @dev Function to receive ETH that will be handled by the governor (disabled if executor is a third party contract)
*/
receive() external payable virtual {
require(_executor() == address(this), "Governor: must send to executor");
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165Upgradeable, ERC165Upgradeable) returns (bool) {
bytes4 governorCancelId = this.cancel.selector ^ this.proposalProposer.selector;
bytes4 governorParamsId = this.castVoteWithReasonAndParams.selector ^
this.castVoteWithReasonAndParamsBySig.selector ^
this.getVotesWithParams.selector;
// The original interface id in v4.3.
bytes4 governor43Id = type(IGovernorUpgradeable).interfaceId ^
type(IERC6372Upgradeable).interfaceId ^
governorCancelId ^
governorParamsId;
// An updated interface id in v4.6, with params added.
bytes4 governor46Id = type(IGovernorUpgradeable).interfaceId ^ type(IERC6372Upgradeable).interfaceId ^ governorCancelId;
// For the updated interface id in v4.9, we use governorCancelId directly.
return
interfaceId == governor43Id ||
interfaceId == governor46Id ||
interfaceId == governorCancelId ||
interfaceId == type(IERC1155ReceiverUpgradeable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IGovernor-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IGovernor-version}.
*/
function version() public view virtual override returns (string memory) {
return "1";
}
/**
* @dev See {IGovernor-hashProposal}.
*
* The proposal id is produced by hashing the ABI encoded `targets` array, the `values` array, the `calldatas` array
* and the descriptionHash (bytes32 which itself is the keccak256 hash of the description string). This proposal id
* can be produced from the proposal data which is part of the {ProposalCreated} event. It can even be computed in
* advance, before the proposal is submitted.
*
* Note that the chainId and the governor address are not part of the proposal id computation. Consequently, the
* same proposal (with same operation and same description) will have the same id if submitted on multiple governors
* across multiple networks. This also means that in order to execute the same operation twice (on the same
* governor) the proposer will have to change the description in order to avoid proposal id conflicts.
*/
function hashProposal(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) public pure virtual override returns (uint256) {
return uint256(keccak256(abi.encode(targets, values, calldatas, descriptionHash)));
}
/**
* @dev See {IGovernor-state}.
*/
function state(uint256 proposalId) public view virtual override returns (ProposalState) {
ProposalCore storage proposal = _proposals[proposalId];
if (proposal.executed) {
return ProposalState.Executed;
}
if (proposal.canceled) {
return ProposalState.Canceled;
}
uint256 snapshot = proposalSnapshot(proposalId);
if (snapshot == 0) {
revert("Governor: unknown proposal id");
}
uint256 currentTimepoint = clock();
if (snapshot >= currentTimepoint) {
return ProposalState.Pending;
}
uint256 deadline = proposalDeadline(proposalId);
if (deadline >= currentTimepoint) {
return ProposalState.Active;
}
if (_quorumReached(proposalId) && _voteSucceeded(proposalId)) {
return ProposalState.Succeeded;
} else {
return ProposalState.Defeated;
}
}
/**
* @dev Part of the Governor Bravo's interface: _"The number of votes required in order for a voter to become a proposer"_.
*/
function proposalThreshold() public view virtual returns (uint256) {
return 0;
}
/**
* @dev See {IGovernor-proposalSnapshot}.
*/
function proposalSnapshot(uint256 proposalId) public view virtual override returns (uint256) {
return _proposals[proposalId].voteStart;
}
/**
* @dev See {IGovernor-proposalDeadline}.
*/
function proposalDeadline(uint256 proposalId) public view virtual override returns (uint256) {
return _proposals[proposalId].voteEnd;
}
/**
* @dev Returns the account that created a given proposal.
*/
function proposalProposer(uint256 proposalId) public view virtual override returns (address) {
return _proposals[proposalId].proposer;
}
/**
* @dev Amount of votes already cast passes the threshold limit.
*/
function _quorumReached(uint256 proposalId) internal view virtual returns (bool);
/**
* @dev Is the proposal successful or not.
*/
function _voteSucceeded(uint256 proposalId) internal view virtual returns (bool);
/**
* @dev Get the voting weight of `account` at a specific `timepoint`, for a vote as described by `params`.
*/
function _getVotes(address account, uint256 timepoint, bytes memory params) internal view virtual returns (uint256);
/**
* @dev Register a vote for `proposalId` by `account` with a given `support`, voting `weight` and voting `params`.
*
* Note: Support is generic and can represent various things depending on the voting system used.
*/
function _countVote(
uint256 proposalId,
address account,
uint8 support,
uint256 weight,
bytes memory params
) internal virtual;
/**
* @dev Default additional encoded parameters used by castVote methods that don't include them
*
* Note: Should be overridden by specific implementations to use an appropriate value, the
* meaning of the additional params, in the context of that implementation
*/
function _defaultParams() internal view virtual returns (bytes memory) {
return "";
}
/**
* @dev See {IGovernor-propose}. This function has opt-in frontrunning protection, described in {_isValidDescriptionForProposer}.
*/
function propose(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
string memory description
) public virtual override returns (uint256) {
address proposer = _msgSender();
require(_isValidDescriptionForProposer(proposer, description), "Governor: proposer restricted");
uint256 currentTimepoint = clock();
require(
getVotes(proposer, currentTimepoint - 1) >= proposalThreshold(),
"Governor: proposer votes below proposal threshold"
);
uint256 proposalId = hashProposal(targets, values, calldatas, keccak256(bytes(description)));
require(targets.length == values.length, "Governor: invalid proposal length");
require(targets.length == calldatas.length, "Governor: invalid proposal length");
require(targets.length > 0, "Governor: empty proposal");
require(_proposals[proposalId].voteStart == 0, "Governor: proposal already exists");
uint256 snapshot = currentTimepoint + votingDelay();
uint256 deadline = snapshot + votingPeriod();
_proposals[proposalId] = ProposalCore({
proposer: proposer,
voteStart: SafeCastUpgradeable.toUint64(snapshot),
voteEnd: SafeCastUpgradeable.toUint64(deadline),
executed: false,
canceled: false,
__gap_unused0: 0,
__gap_unused1: 0
});
emit ProposalCreated(
proposalId,
proposer,
targets,
values,
new string[](targets.length),
calldatas,
snapshot,
deadline,
description
);
return proposalId;
}
/**
* @dev See {IGovernor-execute}.
*/
function execute(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) public payable virtual override returns (uint256) {
uint256 proposalId = hashProposal(targets, values, calldatas, descriptionHash);
ProposalState currentState = state(proposalId);
require(
currentState == ProposalState.Succeeded || currentState == ProposalState.Queued,
"Governor: proposal not successful"
);
_proposals[proposalId].executed = true;
emit ProposalExecuted(proposalId);
_beforeExecute(proposalId, targets, values, calldatas, descriptionHash);
_execute(proposalId, targets, values, calldatas, descriptionHash);
_afterExecute(proposalId, targets, values, calldatas, descriptionHash);
return proposalId;
}
/**
* @dev See {IGovernor-cancel}.
*/
function cancel(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) public virtual override returns (uint256) {
uint256 proposalId = hashProposal(targets, values, calldatas, descriptionHash);
require(state(proposalId) == ProposalState.Pending, "Governor: too late to cancel");
require(_msgSender() == _proposals[proposalId].proposer, "Governor: only proposer can cancel");
return _cancel(targets, values, calldatas, descriptionHash);
}
/**
* @dev Internal execution mechanism. Can be overridden to implement different execution mechanism
*/
function _execute(
uint256 /* proposalId */,
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 /*descriptionHash*/
) internal virtual {
string memory errorMessage = "Governor: call reverted without message";
for (uint256 i = 0; i < targets.length; ++i) {
(bool success, bytes memory returndata) = targets[i].call{value: values[i]}(calldatas[i]);
AddressUpgradeable.verifyCallResult(success, returndata, errorMessage);
}
}
/**
* @dev Hook before execution is triggered.
*/
function _beforeExecute(
uint256 /* proposalId */,
address[] memory targets,
uint256[] memory /* values */,
bytes[] memory calldatas,
bytes32 /*descriptionHash*/
) internal virtual {
if (_executor() != address(this)) {
for (uint256 i = 0; i < targets.length; ++i) {
if (targets[i] == address(this)) {
_governanceCall.pushBack(keccak256(calldatas[i]));
}
}
}
}
/**
* @dev Hook after execution is triggered.
*/
function _afterExecute(
uint256 /* proposalId */,
address[] memory /* targets */,
uint256[] memory /* values */,
bytes[] memory /* calldatas */,
bytes32 /*descriptionHash*/
) internal virtual {
if (_executor() != address(this)) {
if (!_governanceCall.empty()) {
_governanceCall.clear();
}
}
}
/**
* @dev Internal cancel mechanism: locks up the proposal timer, preventing it from being re-submitted. Marks it as
* canceled to allow distinguishing it from executed proposals.
*
* Emits a {IGovernor-ProposalCanceled} event.
*/
function _cancel(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) internal virtual returns (uint256) {
uint256 proposalId = hashProposal(targets, values, calldatas, descriptionHash);
ProposalState currentState = state(proposalId);
require(
currentState != ProposalState.Canceled &&
currentState != ProposalState.Expired &&
currentState != ProposalState.Executed,
"Governor: proposal not active"
);
_proposals[proposalId].canceled = true;
emit ProposalCanceled(proposalId);
return proposalId;
}
/**
* @dev See {IGovernor-getVotes}.
*/
function getVotes(address account, uint256 timepoint) public view virtual override returns (uint256) {
return _getVotes(account, timepoint, _defaultParams());
}
/**
* @dev See {IGovernor-getVotesWithParams}.
*/
function getVotesWithParams(
address account,
uint256 timepoint,
bytes memory params
) public view virtual override returns (uint256) {
return _getVotes(account, timepoint, params);
}
/**
* @dev See {IGovernor-castVote}.
*/
function castVote(uint256 proposalId, uint8 support) public virtual override returns (uint256) {
address voter = _msgSender();
return _castVote(proposalId, voter, support, "");
}
/**
* @dev See {IGovernor-castVoteWithReason}.
*/
function castVoteWithReason(
uint256 proposalId,
uint8 support,
string calldata reason
) public virtual override returns (uint256) {
address voter = _msgSender();
return _castVote(proposalId, voter, support, reason);
}
/**
* @dev See {IGovernor-castVoteWithReasonAndParams}.
*/
function castVoteWithReasonAndParams(
uint256 proposalId,
uint8 support,
string calldata reason,
bytes memory params
) public virtual override returns (uint256) {
address voter = _msgSender();
return _castVote(proposalId, voter, support, reason, params);
}
/**
* @dev See {IGovernor-castVoteBySig}.
*/
function castVoteBySig(
uint256 proposalId,
uint8 support,
uint8 v,
bytes32 r,
bytes32 s
) public virtual override returns (uint256) {
address voter = ECDSAUpgradeable.recover(
_hashTypedDataV4(keccak256(abi.encode(BALLOT_TYPEHASH, proposalId, support))),
v,
r,
s
);
return _castVote(proposalId, voter, support, "");
}
/**
* @dev See {IGovernor-castVoteWithReasonAndParamsBySig}.
*/
function castVoteWithReasonAndParamsBySig(
uint256 proposalId,
uint8 support,
string calldata reason,
bytes memory params,
uint8 v,
bytes32 r,
bytes32 s
) public virtual override returns (uint256) {
address voter = ECDSAUpgradeable.recover(
_hashTypedDataV4(
keccak256(
abi.encode(
EXTENDED_BALLOT_TYPEHASH,
proposalId,
support,
keccak256(bytes(reason)),
keccak256(params)
)
)
),
v,
r,
s
);
return _castVote(proposalId, voter, support, reason, params);
}
/**
* @dev Internal vote casting mechanism: Check that the vote is pending, that it has not been cast yet, retrieve
* voting weight using {IGovernor-getVotes} and call the {_countVote} internal function. Uses the _defaultParams().
*
* Emits a {IGovernor-VoteCast} event.
*/
function _castVote(
uint256 proposalId,
address account,
uint8 support,
string memory reason
) internal virtual returns (uint256) {
return _castVote(proposalId, account, support, reason, _defaultParams());
}
/**
* @dev Internal vote casting mechanism: Check that the vote is pending, that it has not been cast yet, retrieve
* voting weight using {IGovernor-getVotes} and call the {_countVote} internal function.
*
* Emits a {IGovernor-VoteCast} event.
*/
function _castVote(
uint256 proposalId,
address account,
uint8 support,
string memory reason,
bytes memory params
) internal virtual returns (uint256) {
ProposalCore storage proposal = _proposals[proposalId];
require(state(proposalId) == ProposalState.Active, "Governor: vote not currently active");
uint256 weight = _getVotes(account, proposal.voteStart, params);
_countVote(proposalId, account, support, weight, params);
if (params.length == 0) {
emit VoteCast(account, proposalId, support, weight, reason);
} else {
emit VoteCastWithParams(account, proposalId, support, weight, reason, params);
}
return weight;
}
/**
* @dev Relays a transaction or function call to an arbitrary target. In cases where the governance executor
* is some contract other than the governor itself, like when using a timelock, this function can be invoked
* in a governance proposal to recover tokens or Ether that was sent to the governor contract by mistake.
* Note that if the executor is simply the governor itself, use of `relay` is redundant.
*/
function relay(address target, uint256 value, bytes calldata data) external payable virtual onlyGovernance {
(bool success, bytes memory returndata) = target.call{value: value}(data);
AddressUpgradeable.verifyCallResult(success, returndata, "Governor: relay reverted without message");
}
/**
* @dev Address through which the governor executes action. Will be overloaded by module that execute actions
* through another contract such as a timelock.
*/
function _executor() internal view virtual returns (address) {
return address(this);
}
/**
* @dev See {IERC721Receiver-onERC721Received}.
*/
function onERC721Received(address, address, uint256, bytes memory) public virtual override returns (bytes4) {
return this.onERC721Received.selector;
}
/**
* @dev See {IERC1155Receiver-onERC1155Received}.
*/
function onERC1155Received(
address,
address,
uint256,
uint256,
bytes memory
) public virtual override returns (bytes4) {
return this.onERC1155Received.selector;
}
/**
* @dev See {IERC1155Receiver-onERC1155BatchReceived}.
*/
function onERC1155BatchReceived(
address,
address,
uint256[] memory,
uint256[] memory,
bytes memory
) public virtual override returns (bytes4) {
return this.onERC1155BatchReceived.selector;
}
/**
* @dev Check if the proposer is authorized to submit a proposal with the given description.
*
* If the proposal description ends with `#proposer=0x???`, where `0x???` is an address written as a hex string
* (case insensitive), then the submission of this proposal will only be authorized to said address.
*
* This is used for frontrunning protection. By adding this pattern at the end of their proposal, one can ensure
* that no other address can submit the same proposal. An attacker would have to either remove or change that part,
* which would result in a different proposal id.
*
* If the description does not match this pattern, it is unrestricted and anyone can submit it. This includes:
* - If the `0x???` part is not a valid hex string.
* - If the `0x???` part is a valid hex string, but does not contain exactly 40 hex digits.
* - If it ends with the expected suffix followed by newlines or other whitespace.
* - If it ends with some other similar suffix, e.g. `#other=abc`.
* - If it does not end with any such suffix.
*/
function _isValidDescriptionForProposer(
address proposer,
string memory description
) internal view virtual returns (bool) {
uint256 len = bytes(description).length;
// Length is too short to contain a valid proposer suffix
if (len < 52) {
return true;
}
// Extract what would be the `#proposer=0x` marker beginning the suffix
bytes12 marker;
assembly {
// - Start of the string contents in memory = description + 32
// - First character of the marker = len - 52
// - Length of "#proposer=0x0000000000000000000000000000000000000000" = 52
// - We read the memory word starting at the first character of the marker:
// - (description + 32) + (len - 52) = description + (len - 20)
// - Note: Solidity will ignore anything past the first 12 bytes
marker := mload(add(description, sub(len, 20)))
}
// If the marker is not found, there is no proposer suffix to check
if (marker != bytes12("#proposer=0x")) {
return true;
}
// Parse the 40 characters following the marker as uint160
uint160 recovered = 0;
for (uint256 i = len - 40; i < len; ++i) {
(bool isHex, uint8 value) = _tryHexToUint(bytes(description)[i]);
// If any of the characters is not a hex digit, ignore the suffix entirely
if (!isHex) {
return true;
}
recovered = (recovered << 4) | value;
}
return recovered == uint160(proposer);
}
/**
* @dev Try to parse a character from a string as a hex value. Returns `(true, value)` if the char is in
* `[0-9a-fA-F]` and `(false, 0)` otherwise. Value is guaranteed to be in the range `0 <= value < 16`
*/
function _tryHexToUint(bytes1 char) private pure returns (bool, uint8) {
uint8 c = uint8(char);
unchecked {
// Case 0-9
if (47 < c && c < 58) {
return (true, c - 48);
}
// Case A-F
else if (64 < c && c < 71) {
return (true, c - 55);
}
// Case a-f
else if (96 < c && c < 103) {
return (true, c - 87);
}
// Else: not a hex char
else {
return (false, 0);
}
}
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[46] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (governance/IGovernor.sol)
pragma solidity ^0.8.0;
import "../interfaces/IERC165Upgradeable.sol";
import "../interfaces/IERC6372Upgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Interface of the {Governor} core.
*
* _Available since v4.3._
*/
abstract contract IGovernorUpgradeable is Initializable, IERC165Upgradeable, IERC6372Upgradeable {
enum ProposalState {
Pending,
Active,
Canceled,
Defeated,
Succeeded,
Queued,
Expired,
Executed
}
/**
* @dev Emitted when a proposal is created.
*/
event ProposalCreated(
uint256 proposalId,
address proposer,
address[] targets,
uint256[] values,
string[] signatures,
bytes[] calldatas,
uint256 voteStart,
uint256 voteEnd,
string description
);
/**
* @dev Emitted when a proposal is canceled.
*/
event ProposalCanceled(uint256 proposalId);
/**
* @dev Emitted when a proposal is executed.
*/
event ProposalExecuted(uint256 proposalId);
/**
* @dev Emitted when a vote is cast without params.
*
* Note: `support` values should be seen as buckets. Their interpretation depends on the voting module used.
*/
event VoteCast(address indexed voter, uint256 proposalId, uint8 support, uint256 weight, string reason);
/**
* @dev Emitted when a vote is cast with params.
*
* Note: `support` values should be seen as buckets. Their interpretation depends on the voting module used.
* `params` are additional encoded parameters. Their interpepretation also depends on the voting module used.
*/
event VoteCastWithParams(
address indexed voter,
uint256 proposalId,
uint8 support,
uint256 weight,
string reason,
bytes params
);
function __IGovernor_init() internal onlyInitializing {
}
function __IGovernor_init_unchained() internal onlyInitializing {
}
/**
* @notice module:core
* @dev Name of the governor instance (used in building the ERC712 domain separator).
*/
function name() public view virtual returns (string memory);
/**
* @notice module:core
* @dev Version of the governor instance (used in building the ERC712 domain separator). Default: "1"
*/
function version() public view virtual returns (string memory);
/**
* @notice module:core
* @dev See {IERC6372}
*/
function clock() public view virtual override returns (uint48);
/**
* @notice module:core
* @dev See EIP-6372.
*/
// solhint-disable-next-line func-name-mixedcase
function CLOCK_MODE() public view virtual override returns (string memory);
/**
* @notice module:voting
* @dev A description of the possible `support` values for {castVote} and the way these votes are counted, meant to
* be consumed by UIs to show correct vote options and interpret the results. The string is a URL-encoded sequence of
* key-value pairs that each describe one aspect, for example `support=bravo&quorum=for,abstain`.
*
* There are 2 standard keys: `support` and `quorum`.
*
* - `support=bravo` refers to the vote options 0 = Against, 1 = For, 2 = Abstain, as in `GovernorBravo`.
* - `quorum=bravo` means that only For votes are counted towards quorum.
* - `quorum=for,abstain` means that both For and Abstain votes are counted towards quorum.
*
* If a counting module makes use of encoded `params`, it should include this under a `params` key with a unique
* name that describes the behavior. For example:
*
* - `params=fractional` might refer to a scheme where votes are divided fractionally between for/against/abstain.
* - `params=erc721` might refer to a scheme where specific NFTs are delegated to vote.
*
* NOTE: The string can be decoded by the standard
* https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams[`URLSearchParams`]
* JavaScript class.
*/
// solhint-disable-next-line func-name-mixedcase
function COUNTING_MODE() public view virtual returns (string memory);
/**
* @notice module:core
* @dev Hashing function used to (re)build the proposal id from the proposal details..
*/
function hashProposal(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) public pure virtual returns (uint256);
/**
* @notice module:core
* @dev Current state of a proposal, following Compound's convention
*/
function state(uint256 proposalId) public view virtual returns (ProposalState);
/**
* @notice module:core
* @dev Timepoint used to retrieve user's votes and quorum. If using block number (as per Compound's Comp), the
* snapshot is performed at the end of this block. Hence, voting for this proposal starts at the beginning of the
* following block.
*/
function proposalSnapshot(uint256 proposalId) public view virtual returns (uint256);
/**
* @notice module:core
* @dev Timepoint at which votes close. If using block number, votes close at the end of this block, so it is
* possible to cast a vote during this block.
*/
function proposalDeadline(uint256 proposalId) public view virtual returns (uint256);
/**
* @notice module:core
* @dev The account that created a proposal.
*/
function proposalProposer(uint256 proposalId) public view virtual returns (address);
/**
* @notice module:user-config
* @dev Delay, between the proposal is created and the vote starts. The unit this duration is expressed in depends
* on the clock (see EIP-6372) this contract uses.
*
* This can be increased to leave time for users to buy voting power, or delegate it, before the voting of a
* proposal starts.
*/
function votingDelay() public view virtual returns (uint256);
/**
* @notice module:user-config
* @dev Delay between the vote start and vote end. The unit this duration is expressed in depends on the clock
* (see EIP-6372) this contract uses.
*
* NOTE: The {votingDelay} can delay the start of the vote. This must be considered when setting the voting
* duration compared to the voting delay.
*/
function votingPeriod() public view virtual returns (uint256);
/**
* @notice module:user-config
* @dev Minimum number of cast voted required for a proposal to be successful.
*
* NOTE: The `timepoint` parameter corresponds to the snapshot used for counting vote. This allows to scale the
* quorum depending on values such as the totalSupply of a token at this timepoint (see {ERC20Votes}).
*/
function quorum(uint256 timepoint) public view virtual returns (uint256);
/**
* @notice module:reputation
* @dev Voting power of an `account` at a specific `timepoint`.
*
* Note: this can be implemented in a number of ways, for example by reading the delegated balance from one (or
* multiple), {ERC20Votes} tokens.
*/
function getVotes(address account, uint256 timepoint) public view virtual returns (uint256);
/**
* @notice module:reputation
* @dev Voting power of an `account` at a specific `timepoint` given additional encoded parameters.
*/
function getVotesWithParams(
address account,
uint256 timepoint,
bytes memory params
) public view virtual returns (uint256);
/**
* @notice module:voting
* @dev Returns whether `account` has cast a vote on `proposalId`.
*/
function hasVoted(uint256 proposalId, address account) public view virtual returns (bool);
/**
* @dev Create a new proposal. Vote start after a delay specified by {IGovernor-votingDelay} and lasts for a
* duration specified by {IGovernor-votingPeriod}.
*
* Emits a {ProposalCreated} event.
*/
function propose(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
string memory description
) public virtual returns (uint256 proposalId);
/**
* @dev Execute a successful proposal. This requires the quorum to be reached, the vote to be successful, and the
* deadline to be reached.
*
* Emits a {ProposalExecuted} event.
*
* Note: some module can modify the requirements for execution, for example by adding an additional timelock.
*/
function execute(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) public payable virtual returns (uint256 proposalId);
/**
* @dev Cancel a proposal. A proposal is cancellable by the proposer, but only while it is Pending state, i.e.
* before the vote starts.
*
* Emits a {ProposalCanceled} event.
*/
function cancel(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
) public virtual returns (uint256 proposalId);
/**
* @dev Cast a vote
*
* Emits a {VoteCast} event.
*/
function castVote(uint256 proposalId, uint8 support) public virtual returns (uint256 balance);
/**
* @dev Cast a vote with a reason
*
* Emits a {VoteCast} event.
*/
function castVoteWithReason(
uint256 proposalId,
uint8 support,
string calldata reason
) public virtual returns (uint256 balance);
/**
* @dev Cast a vote with a reason and additional encoded parameters
*
* Emits a {VoteCast} or {VoteCastWithParams} event depending on the length of params.
*/
function castVoteWithReasonAndParams(
uint256 proposalId,
uint8 support,
string calldata reason,
bytes memory params
) public virtual returns (uint256 balance);
/**
* @dev Cast a vote using the user's cryptographic signature.
*
* Emits a {VoteCast} event.
*/
function castVoteBySig(
uint256 proposalId,
uint8 support,
uint8 v,
bytes32 r,
bytes32 s
) public virtual returns (uint256 balance);
/**
* @dev Cast a vote with a reason and additional encoded parameters using the user's cryptographic signature.
*
* Emits a {VoteCast} or {VoteCastWithParams} event depending on the length of params.
*/
function castVoteWithReasonAndParamsBySig(
uint256 proposalId,
uint8 support,
string calldata reason,
bytes memory params,
uint8 v,
bytes32 r,
bytes32 s
) public virtual returns (uint256 balance);
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (governance/TimelockController.sol)
pragma solidity ^0.8.0;
import "../access/AccessControlUpgradeable.sol";
import "../token/ERC721/IERC721ReceiverUpgradeable.sol";
import "../token/ERC1155/IERC1155ReceiverUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which acts as a timelocked controller. When set as the
* owner of an `Ownable` smart contract, it enforces a timelock on all
* `onlyOwner` maintenance operations. This gives time for users of the
* controlled contract to exit before a potentially dangerous maintenance
* operation is applied.
*
* By default, this contract is self administered, meaning administration tasks
* have to go through the timelock process. The proposer (resp executor) role
* is in charge of proposing (resp executing) operations. A common use case is
* to position this {TimelockController} as the owner of a smart contract, with
* a multisig or a DAO as the sole proposer.
*
* _Available since v3.3._
*/
contract TimelockControllerUpgradeable is Initializable, AccessControlUpgradeable, IERC721ReceiverUpgradeable, IERC1155ReceiverUpgradeable {
bytes32 public constant TIMELOCK_ADMIN_ROLE = keccak256("TIMELOCK_ADMIN_ROLE");
bytes32 public constant PROPOSER_ROLE = keccak256("PROPOSER_ROLE");
bytes32 public constant EXECUTOR_ROLE = keccak256("EXECUTOR_ROLE");
bytes32 public constant CANCELLER_ROLE = keccak256("CANCELLER_ROLE");
uint256 internal constant _DONE_TIMESTAMP = uint256(1);
mapping(bytes32 => uint256) private _timestamps;
uint256 private _minDelay;
/**
* @dev Emitted when a call is scheduled as part of operation `id`.
*/
event CallScheduled(
bytes32 indexed id,
uint256 indexed index,
address target,
uint256 value,
bytes data,
bytes32 predecessor,
uint256 delay
);
/**
* @dev Emitted when a call is performed as part of operation `id`.
*/
event CallExecuted(bytes32 indexed id, uint256 indexed index, address target, uint256 value, bytes data);
/**
* @dev Emitted when new proposal is scheduled with non-zero salt.
*/
event CallSalt(bytes32 indexed id, bytes32 salt);
/**
* @dev Emitted when operation `id` is cancelled.
*/
event Cancelled(bytes32 indexed id);
/**
* @dev Emitted when the minimum delay for future operations is modified.
*/
event MinDelayChange(uint256 oldDuration, uint256 newDuration);
/**
* @dev Initializes the contract with the following parameters:
*
* - `minDelay`: initial minimum delay for operations
* - `proposers`: accounts to be granted proposer and canceller roles
* - `executors`: accounts to be granted executor role
* - `admin`: optional account to be granted admin role; disable with zero address
*
* IMPORTANT: The optional admin can aid with initial configuration of roles after deployment
* without being subject to delay, but this role should be subsequently renounced in favor of
* administration through timelocked proposals. Previous versions of this contract would assign
* this admin to the deployer automatically and should be renounced as well.
*/
function __TimelockController_init(uint256 minDelay, address[] memory proposers, address[] memory executors, address admin) internal onlyInitializing {
__TimelockController_init_unchained(minDelay, proposers, executors, admin);
}
function __TimelockController_init_unchained(uint256 minDelay, address[] memory proposers, address[] memory executors, address admin) internal onlyInitializing {
_setRoleAdmin(TIMELOCK_ADMIN_ROLE, TIMELOCK_ADMIN_ROLE);
_setRoleAdmin(PROPOSER_ROLE, TIMELOCK_ADMIN_ROLE);
_setRoleAdmin(EXECUTOR_ROLE, TIMELOCK_ADMIN_ROLE);
_setRoleAdmin(CANCELLER_ROLE, TIMELOCK_ADMIN_ROLE);
// self administration
_setupRole(TIMELOCK_ADMIN_ROLE, address(this));
// optional admin
if (admin != address(0)) {
_setupRole(TIMELOCK_ADMIN_ROLE, admin);
}
// register proposers and cancellers
for (uint256 i = 0; i < proposers.length; ++i) {
_setupRole(PROPOSER_ROLE, proposers[i]);
_setupRole(CANCELLER_ROLE, proposers[i]);
}
// register executors
for (uint256 i = 0; i < executors.length; ++i) {
_setupRole(EXECUTOR_ROLE, executors[i]);
}
_minDelay = minDelay;
emit MinDelayChange(0, minDelay);
}
/**
* @dev Modifier to make a function callable only by a certain role. In
* addition to checking the sender's role, `address(0)` 's role is also
* considered. Granting a role to `address(0)` is equivalent to enabling
* this role for everyone.
*/
modifier onlyRoleOrOpenRole(bytes32 role) {
if (!hasRole(role, address(0))) {
_checkRole(role, _msgSender());
}
_;
}
/**
* @dev Contract might receive/hold ETH as part of the maintenance process.
*/
receive() external payable {}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165Upgradeable, AccessControlUpgradeable) returns (bool) {
return interfaceId == type(IERC1155ReceiverUpgradeable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns whether an id correspond to a registered operation. This
* includes both Pending, Ready and Done operations.
*/
function isOperation(bytes32 id) public view virtual returns (bool) {
return getTimestamp(id) > 0;
}
/**
* @dev Returns whether an operation is pending or not. Note that a "pending" operation may also be "ready".
*/
function isOperationPending(bytes32 id) public view virtual returns (bool) {
return getTimestamp(id) > _DONE_TIMESTAMP;
}
/**
* @dev Returns whether an operation is ready for execution. Note that a "ready" operation is also "pending".
*/
function isOperationReady(bytes32 id) public view virtual returns (bool) {
uint256 timestamp = getTimestamp(id);
return timestamp > _DONE_TIMESTAMP && timestamp <= block.timestamp;
}
/**
* @dev Returns whether an operation is done or not.
*/
function isOperationDone(bytes32 id) public view virtual returns (bool) {
return getTimestamp(id) == _DONE_TIMESTAMP;
}
/**
* @dev Returns the timestamp at which an operation becomes ready (0 for
* unset operations, 1 for done operations).
*/
function getTimestamp(bytes32 id) public view virtual returns (uint256) {
return _timestamps[id];
}
/**
* @dev Returns the minimum delay for an operation to become valid.
*
* This value can be changed by executing an operation that calls `updateDelay`.
*/
function getMinDelay() public view virtual returns (uint256) {
return _minDelay;
}
/**
* @dev Returns the identifier of an operation containing a single
* transaction.
*/
function hashOperation(
address target,
uint256 value,
bytes calldata data,
bytes32 predecessor,
bytes32 salt
) public pure virtual returns (bytes32) {
return keccak256(abi.encode(target, value, data, predecessor, salt));
}
/**
* @dev Returns the identifier of an operation containing a batch of
* transactions.
*/
function hashOperationBatch(
address[] calldata targets,
uint256[] calldata values,
bytes[] calldata payloads,
bytes32 predecessor,
bytes32 salt
) public pure virtual returns (bytes32) {
return keccak256(abi.encode(targets, values, payloads, predecessor, salt));
}
/**
* @dev Schedule an operation containing a single transaction.
*
* Emits {CallSalt} if salt is nonzero, and {CallScheduled}.
*
* Requirements:
*
* - the caller must have the 'proposer' role.
*/
function schedule(
address target,
uint256 value,
bytes calldata data,
bytes32 predecessor,
bytes32 salt,
uint256 delay
) public virtual onlyRole(PROPOSER_ROLE) {
bytes32 id = hashOperation(target, value, data, predecessor, salt);
_schedule(id, delay);
emit CallScheduled(id, 0, target, value, data, predecessor, delay);
if (salt != bytes32(0)) {
emit CallSalt(id, salt);
}
}
/**
* @dev Schedule an operation containing a batch of transactions.
*
* Emits {CallSalt} if salt is nonzero, and one {CallScheduled} event per transaction in the batch.
*
* Requirements:
*
* - the caller must have the 'proposer' role.
*/
function scheduleBatch(
address[] calldata targets,
uint256[] calldata values,
bytes[] calldata payloads,
bytes32 predecessor,
bytes32 salt,
uint256 delay
) public virtual onlyRole(PROPOSER_ROLE) {
require(targets.length == values.length, "TimelockController: length mismatch");
require(targets.length == payloads.length, "TimelockController: length mismatch");
bytes32 id = hashOperationBatch(targets, values, payloads, predecessor, salt);
_schedule(id, delay);
for (uint256 i = 0; i < targets.length; ++i) {
emit CallScheduled(id, i, targets[i], values[i], payloads[i], predecessor, delay);
}
if (salt != bytes32(0)) {
emit CallSalt(id, salt);
}
}
/**
* @dev Schedule an operation that is to become valid after a given delay.
*/
function _schedule(bytes32 id, uint256 delay) private {
require(!isOperation(id), "TimelockController: operation already scheduled");
require(delay >= getMinDelay(), "TimelockController: insufficient delay");
_timestamps[id] = block.timestamp + delay;
}
/**
* @dev Cancel an operation.
*
* Requirements:
*
* - the caller must have the 'canceller' role.
*/
function cancel(bytes32 id) public virtual onlyRole(CANCELLER_ROLE) {
require(isOperationPending(id), "TimelockController: operation cannot be cancelled");
delete _timestamps[id];
emit Cancelled(id);
}
/**
* @dev Execute an (ready) operation containing a single transaction.
*
* Emits a {CallExecuted} event.
*
* Requirements:
*
* - the caller must have the 'executor' role.
*/
// This function can reenter, but it doesn't pose a risk because _afterCall checks that the proposal is pending,
// thus any modifications to the operation during reentrancy should be caught.
// slither-disable-next-line reentrancy-eth
function execute(
address target,
uint256 value,
bytes calldata payload,
bytes32 predecessor,
bytes32 salt
) public payable virtual onlyRoleOrOpenRole(EXECUTOR_ROLE) {
bytes32 id = hashOperation(target, value, payload, predecessor, salt);
_beforeCall(id, predecessor);
_execute(target, value, payload);
emit CallExecuted(id, 0, target, value, payload);
_afterCall(id);
}
/**
* @dev Execute an (ready) operation containing a batch of transactions.
*
* Emits one {CallExecuted} event per transaction in the batch.
*
* Requirements:
*
* - the caller must have the 'executor' role.
*/
// This function can reenter, but it doesn't pose a risk because _afterCall checks that the proposal is pending,
// thus any modifications to the operation during reentrancy should be caught.
// slither-disable-next-line reentrancy-eth
function executeBatch(
address[] calldata targets,
uint256[] calldata values,
bytes[] calldata payloads,
bytes32 predecessor,
bytes32 salt
) public payable virtual onlyRoleOrOpenRole(EXECUTOR_ROLE) {
require(targets.length == values.length, "TimelockController: length mismatch");
require(targets.length == payloads.length, "TimelockController: length mismatch");
bytes32 id = hashOperationBatch(targets, values, payloads, predecessor, salt);
_beforeCall(id, predecessor);
for (uint256 i = 0; i < targets.length; ++i) {
address target = targets[i];
uint256 value = values[i];
bytes calldata payload = payloads[i];
_execute(target, value, payload);
emit CallExecuted(id, i, target, value, payload);
}
_afterCall(id);
}
/**
* @dev Execute an operation's call.
*/
function _execute(address target, uint256 value, bytes calldata data) internal virtual {
(bool success, ) = target.call{value: value}(data);
require(success, "TimelockController: underlying transaction reverted");
}
/**
* @dev Checks before execution of an operation's calls.
*/
function _beforeCall(bytes32 id, bytes32 predecessor) private view {
require(isOperationReady(id), "TimelockController: operation is not ready");
require(predecessor == bytes32(0) || isOperationDone(predecessor), "TimelockController: missing dependency");
}
/**
* @dev Checks after execution of an operation's calls.
*/
function _afterCall(bytes32 id) private {
require(isOperationReady(id), "TimelockController: operation is not ready");
_timestamps[id] = _DONE_TIMESTAMP;
}
/**
* @dev Changes the minimum timelock duration for future operations.
*
* Emits a {MinDelayChange} event.
*
* Requirements:
*
* - the caller must be the timelock itself. This can only be achieved by scheduling and later executing
* an operation where the timelock is the target and the data is the ABI-encoded call to this function.
*/
function updateDelay(uint256 newDelay) external virtual {
require(msg.sender == address(this), "TimelockController: caller must be timelock");
emit MinDelayChange(_minDelay, newDelay);
_minDelay = newDelay;
}
/**
* @dev See {IERC721Receiver-onERC721Received}.
*/
function onERC721Received(address, address, uint256, bytes memory) public virtual override returns (bytes4) {
return this.onERC721Received.selector;
}
/**
* @dev See {IERC1155Receiver-onERC1155Received}.
*/
function onERC1155Received(
address,
address,
uint256,
uint256,
bytes memory
) public virtual override returns (bytes4) {
return this.onERC1155Received.selector;
}
/**
* @dev See {IERC1155Receiver-onERC1155BatchReceived}.
*/
function onERC1155BatchReceived(
address,
address,
uint256[] memory,
uint256[] memory,
bytes memory
) public virtual override returns (bytes4) {
return this.onERC1155BatchReceived.selector;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[48] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (governance/utils/IVotes.sol)
pragma solidity ^0.8.0;
/**
* @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts.
*
* _Available since v4.5._
*/
interface IVotesUpgradeable {
/**
* @dev Emitted when an account changes their delegate.
*/
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/**
* @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of votes.
*/
event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);
/**
* @dev Returns the current amount of votes that `account` has.
*/
function getVotes(address account) external view returns (uint256);
/**
* @dev Returns the amount of votes that `account` had at a specific moment in the past. If the `clock()` is
* configured to use block numbers, this will return the value at the end of the corresponding block.
*/
function getPastVotes(address account, uint256 timepoint) external view returns (uint256);
/**
* @dev Returns the total supply of votes available at a specific moment in the past. If the `clock()` is
* configured to use block numbers, this will return the value at the end of the corresponding block.
*
* NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes.
* Votes that have not been delegated are still part of total supply, even though they would not participate in a
* vote.
*/
function getPastTotalSupply(uint256 timepoint) external view returns (uint256);
/**
* @dev Returns the delegate that `account` has chosen.
*/
function delegates(address account) external view returns (address);
/**
* @dev Delegates votes from the sender to `delegatee`.
*/
function delegate(address delegatee) external;
/**
* @dev Delegates votes from signer to `delegatee`.
*/
function delegateBySig(address delegatee, uint256 nonce, uint256 expiry, uint8 v, bytes32 r, bytes32 s) external;
}// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol) pragma solidity ^0.8.0; import "../utils/introspection/IERC165Upgradeable.sol";
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5267.sol)
pragma solidity ^0.8.0;
interface IERC5267Upgradeable {
/**
* @dev MAY be emitted to signal that the domain could have changed.
*/
event EIP712DomainChanged();
/**
* @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
* signature.
*/
function eip712Domain()
external
view
returns (
bytes1 fields,
string memory name,
string memory version,
uint256 chainId,
address verifyingContract,
bytes32 salt,
uint256[] memory extensions
);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5805.sol)
pragma solidity ^0.8.0;
import "../governance/utils/IVotesUpgradeable.sol";
import "./IERC6372Upgradeable.sol";
interface IERC5805Upgradeable is IERC6372Upgradeable, IVotesUpgradeable {}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC6372.sol)
pragma solidity ^0.8.0;
interface IERC6372Upgradeable {
/**
* @dev Clock used for flagging checkpoints. Can be overridden to implement timestamp based checkpoints (and voting).
*/
function clock() external view returns (uint48);
/**
* @dev Description of the clock
*/
// solhint-disable-next-line func-name-mixedcase
function CLOCK_MODE() external view returns (string memory);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
* reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
* case an upgrade adds a module that needs to be initialized.
*
* For example:
*
* [.hljs-theme-light.nopadding]
* ```solidity
* contract MyToken is ERC20Upgradeable {
* function initialize() initializer public {
* __ERC20_init("MyToken", "MTK");
* }
* }
*
* contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
* function initializeV2() reinitializer(2) public {
* __ERC20Permit_init("MyToken");
* }
* }
* ```
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
* the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() {
* _disableInitializers();
* }
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
* @custom:oz-retyped-from bool
*/
uint8 private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Triggered when the contract has been initialized or reinitialized.
*/
event Initialized(uint8 version);
/**
* @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
* `onlyInitializing` functions can be used to initialize parent contracts.
*
* Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
* constructor.
*
* Emits an {Initialized} event.
*/
modifier initializer() {
bool isTopLevelCall = !_initializing;
require(
(isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
"Initializable: contract is already initialized"
);
_initialized = 1;
if (isTopLevelCall) {
_initializing = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
emit Initialized(1);
}
}
/**
* @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
* contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
* used to initialize parent contracts.
*
* A reinitializer may be used after the original initialization step. This is essential to configure modules that
* are added through upgrades and that require initialization.
*
* When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
* cannot be nested. If one is invoked in the context of another, execution will revert.
*
* Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
* a contract, executing them in the right order is up to the developer or operator.
*
* WARNING: setting the version to 255 will prevent any future reinitialization.
*
* Emits an {Initialized} event.
*/
modifier reinitializer(uint8 version) {
require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
_initialized = version;
_initializing = true;
_;
_initializing = false;
emit Initialized(version);
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} and {reinitializer} modifiers, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
/**
* @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
* Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
* to any version. It is recommended to use this to lock implementation contracts that are designed to be called
* through proxies.
*
* Emits an {Initialized} event the first time it is successfully executed.
*/
function _disableInitializers() internal virtual {
require(!_initializing, "Initializable: contract is initializing");
if (_initialized != type(uint8).max) {
_initialized = type(uint8).max;
emit Initialized(type(uint8).max);
}
}
/**
* @dev Returns the highest version that has been initialized. See {reinitializer}.
*/
function _getInitializedVersion() internal view returns (uint8) {
return _initialized;
}
/**
* @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
*/
function _isInitializing() internal view returns (bool) {
return _initializing;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165Upgradeable.sol";
/**
* @dev _Available since v3.1._
*/
interface IERC1155ReceiverUpgradeable is IERC165Upgradeable {
/**
* @dev Handles the receipt of a single ERC1155 token type. This function is
* called at the end of a `safeTransferFrom` after the balance has been updated.
*
* NOTE: To accept the transfer, this must return
* `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
* (i.e. 0xf23a6e61, or its own function selector).
*
* @param operator The address which initiated the transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param id The ID of the token being transferred
* @param value The amount of tokens being transferred
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
) external returns (bytes4);
/**
* @dev Handles the receipt of a multiple ERC1155 token types. This function
* is called at the end of a `safeBatchTransferFrom` after the balances have
* been updated.
*
* NOTE: To accept the transfer(s), this must return
* `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
* (i.e. 0xbc197c81, or its own function selector).
*
* @param operator The address which initiated the batch transfer (i.e. msg.sender)
* @param from The address which previously owned the token
* @param ids An array containing ids of each token being transferred (order and length must match values array)
* @param values An array containing amounts of each token being transferred (order and length must match ids array)
* @param data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
) external returns (bytes4);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721ReceiverUpgradeable {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Checkpoints.sol)
// This file was procedurally generated from scripts/generate/templates/Checkpoints.js.
pragma solidity ^0.8.0;
import "./math/MathUpgradeable.sol";
import "./math/SafeCastUpgradeable.sol";
/**
* @dev This library defines the `History` struct, for checkpointing values as they change at different points in
* time, and later looking up past values by block number. See {Votes} as an example.
*
* To create a history of checkpoints define a variable type `Checkpoints.History` in your contract, and store a new
* checkpoint for the current transaction block using the {push} function.
*
* _Available since v4.5._
*/
library CheckpointsUpgradeable {
struct History {
Checkpoint[] _checkpoints;
}
struct Checkpoint {
uint32 _blockNumber;
uint224 _value;
}
/**
* @dev Returns the value at a given block number. If a checkpoint is not available at that block, the closest one
* before it is returned, or zero otherwise. Because the number returned corresponds to that at the end of the
* block, the requested block number must be in the past, excluding the current block.
*/
function getAtBlock(History storage self, uint256 blockNumber) internal view returns (uint256) {
require(blockNumber < block.number, "Checkpoints: block not yet mined");
uint32 key = SafeCastUpgradeable.toUint32(blockNumber);
uint256 len = self._checkpoints.length;
uint256 pos = _upperBinaryLookup(self._checkpoints, key, 0, len);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value at a given block number. If a checkpoint is not available at that block, the closest one
* before it is returned, or zero otherwise. Similar to {upperLookup} but optimized for the case when the searched
* checkpoint is probably "recent", defined as being among the last sqrt(N) checkpoints where N is the number of
* checkpoints.
*/
function getAtProbablyRecentBlock(History storage self, uint256 blockNumber) internal view returns (uint256) {
require(blockNumber < block.number, "Checkpoints: block not yet mined");
uint32 key = SafeCastUpgradeable.toUint32(blockNumber);
uint256 len = self._checkpoints.length;
uint256 low = 0;
uint256 high = len;
if (len > 5) {
uint256 mid = len - MathUpgradeable.sqrt(len);
if (key < _unsafeAccess(self._checkpoints, mid)._blockNumber) {
high = mid;
} else {
low = mid + 1;
}
}
uint256 pos = _upperBinaryLookup(self._checkpoints, key, low, high);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Pushes a value onto a History so that it is stored as the checkpoint for the current block.
*
* Returns previous value and new value.
*/
function push(History storage self, uint256 value) internal returns (uint256, uint256) {
return _insert(self._checkpoints, SafeCastUpgradeable.toUint32(block.number), SafeCastUpgradeable.toUint224(value));
}
/**
* @dev Pushes a value onto a History, by updating the latest value using binary operation `op`. The new value will
* be set to `op(latest, delta)`.
*
* Returns previous value and new value.
*/
function push(
History storage self,
function(uint256, uint256) view returns (uint256) op,
uint256 delta
) internal returns (uint256, uint256) {
return push(self, op(latest(self), delta));
}
/**
* @dev Returns the value in the most recent checkpoint, or zero if there are no checkpoints.
*/
function latest(History storage self) internal view returns (uint224) {
uint256 pos = self._checkpoints.length;
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns whether there is a checkpoint in the structure (i.e. it is not empty), and if so the key and value
* in the most recent checkpoint.
*/
function latestCheckpoint(
History storage self
) internal view returns (bool exists, uint32 _blockNumber, uint224 _value) {
uint256 pos = self._checkpoints.length;
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._blockNumber, ckpt._value);
}
}
/**
* @dev Returns the number of checkpoint.
*/
function length(History storage self) internal view returns (uint256) {
return self._checkpoints.length;
}
/**
* @dev Pushes a (`key`, `value`) pair into an ordered list of checkpoints, either by inserting a new checkpoint,
* or by updating the last one.
*/
function _insert(Checkpoint[] storage self, uint32 key, uint224 value) private returns (uint224, uint224) {
uint256 pos = self.length;
if (pos > 0) {
// Copying to memory is important here.
Checkpoint memory last = _unsafeAccess(self, pos - 1);
// Checkpoint keys must be non-decreasing.
require(last._blockNumber <= key, "Checkpoint: decreasing keys");
// Update or push new checkpoint
if (last._blockNumber == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint({_blockNumber: key, _value: value}));
}
return (last._value, value);
} else {
self.push(Checkpoint({_blockNumber: key, _value: value}));
return (0, value);
}
}
/**
* @dev Return the index of the last (most recent) checkpoint with key lower or equal than the search key, or `high` if there is none.
* `low` and `high` define a section where to do the search, with inclusive `low` and exclusive `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _upperBinaryLookup(
Checkpoint[] storage self,
uint32 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = MathUpgradeable.average(low, high);
if (_unsafeAccess(self, mid)._blockNumber > key) {
high = mid;
} else {
low = mid + 1;
}
}
return high;
}
/**
* @dev Return the index of the first (oldest) checkpoint with key is greater or equal than the search key, or `high` if there is none.
* `low` and `high` define a section where to do the search, with inclusive `low` and exclusive `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _lowerBinaryLookup(
Checkpoint[] storage self,
uint32 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = MathUpgradeable.average(low, high);
if (_unsafeAccess(self, mid)._blockNumber < key) {
low = mid + 1;
} else {
high = mid;
}
}
return high;
}
/**
* @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
*/
function _unsafeAccess(Checkpoint[] storage self, uint256 pos) private pure returns (Checkpoint storage result) {
assembly {
mstore(0, self.slot)
result.slot := add(keccak256(0, 0x20), pos)
}
}
struct Trace224 {
Checkpoint224[] _checkpoints;
}
struct Checkpoint224 {
uint32 _key;
uint224 _value;
}
/**
* @dev Pushes a (`key`, `value`) pair into a Trace224 so that it is stored as the checkpoint.
*
* Returns previous value and new value.
*/
function push(Trace224 storage self, uint32 key, uint224 value) internal returns (uint224, uint224) {
return _insert(self._checkpoints, key, value);
}
/**
* @dev Returns the value in the first (oldest) checkpoint with key greater or equal than the search key, or zero if there is none.
*/
function lowerLookup(Trace224 storage self, uint32 key) internal view returns (uint224) {
uint256 len = self._checkpoints.length;
uint256 pos = _lowerBinaryLookup(self._checkpoints, key, 0, len);
return pos == len ? 0 : _unsafeAccess(self._checkpoints, pos)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none.
*/
function upperLookup(Trace224 storage self, uint32 key) internal view returns (uint224) {
uint256 len = self._checkpoints.length;
uint256 pos = _upperBinaryLookup(self._checkpoints, key, 0, len);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none.
*
* NOTE: This is a variant of {upperLookup} that is optimised to find "recent" checkpoint (checkpoints with high keys).
*/
function upperLookupRecent(Trace224 storage self, uint32 key) internal view returns (uint224) {
uint256 len = self._checkpoints.length;
uint256 low = 0;
uint256 high = len;
if (len > 5) {
uint256 mid = len - MathUpgradeable.sqrt(len);
if (key < _unsafeAccess(self._checkpoints, mid)._key) {
high = mid;
} else {
low = mid + 1;
}
}
uint256 pos = _upperBinaryLookup(self._checkpoints, key, low, high);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the most recent checkpoint, or zero if there are no checkpoints.
*/
function latest(Trace224 storage self) internal view returns (uint224) {
uint256 pos = self._checkpoints.length;
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns whether there is a checkpoint in the structure (i.e. it is not empty), and if so the key and value
* in the most recent checkpoint.
*/
function latestCheckpoint(Trace224 storage self) internal view returns (bool exists, uint32 _key, uint224 _value) {
uint256 pos = self._checkpoints.length;
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint224 memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._key, ckpt._value);
}
}
/**
* @dev Returns the number of checkpoint.
*/
function length(Trace224 storage self) internal view returns (uint256) {
return self._checkpoints.length;
}
/**
* @dev Pushes a (`key`, `value`) pair into an ordered list of checkpoints, either by inserting a new checkpoint,
* or by updating the last one.
*/
function _insert(Checkpoint224[] storage self, uint32 key, uint224 value) private returns (uint224, uint224) {
uint256 pos = self.length;
if (pos > 0) {
// Copying to memory is important here.
Checkpoint224 memory last = _unsafeAccess(self, pos - 1);
// Checkpoint keys must be non-decreasing.
require(last._key <= key, "Checkpoint: decreasing keys");
// Update or push new checkpoint
if (last._key == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint224({_key: key, _value: value}));
}
return (last._value, value);
} else {
self.push(Checkpoint224({_key: key, _value: value}));
return (0, value);
}
}
/**
* @dev Return the index of the last (most recent) checkpoint with key lower or equal than the search key, or `high` if there is none.
* `low` and `high` define a section where to do the search, with inclusive `low` and exclusive `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _upperBinaryLookup(
Checkpoint224[] storage self,
uint32 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = MathUpgradeable.average(low, high);
if (_unsafeAccess(self, mid)._key > key) {
high = mid;
} else {
low = mid + 1;
}
}
return high;
}
/**
* @dev Return the index of the first (oldest) checkpoint with key is greater or equal than the search key, or `high` if there is none.
* `low` and `high` define a section where to do the search, with inclusive `low` and exclusive `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _lowerBinaryLookup(
Checkpoint224[] storage self,
uint32 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = MathUpgradeable.average(low, high);
if (_unsafeAccess(self, mid)._key < key) {
low = mid + 1;
} else {
high = mid;
}
}
return high;
}
/**
* @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
*/
function _unsafeAccess(
Checkpoint224[] storage self,
uint256 pos
) private pure returns (Checkpoint224 storage result) {
assembly {
mstore(0, self.slot)
result.slot := add(keccak256(0, 0x20), pos)
}
}
struct Trace160 {
Checkpoint160[] _checkpoints;
}
struct Checkpoint160 {
uint96 _key;
uint160 _value;
}
/**
* @dev Pushes a (`key`, `value`) pair into a Trace160 so that it is stored as the checkpoint.
*
* Returns previous value and new value.
*/
function push(Trace160 storage self, uint96 key, uint160 value) internal returns (uint160, uint160) {
return _insert(self._checkpoints, key, value);
}
/**
* @dev Returns the value in the first (oldest) checkpoint with key greater or equal than the search key, or zero if there is none.
*/
function lowerLookup(Trace160 storage self, uint96 key) internal view returns (uint160) {
uint256 len = self._checkpoints.length;
uint256 pos = _lowerBinaryLookup(self._checkpoints, key, 0, len);
return pos == len ? 0 : _unsafeAccess(self._checkpoints, pos)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none.
*/
function upperLookup(Trace160 storage self, uint96 key) internal view returns (uint160) {
uint256 len = self._checkpoints.length;
uint256 pos = _upperBinaryLookup(self._checkpoints, key, 0, len);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none.
*
* NOTE: This is a variant of {upperLookup} that is optimised to find "recent" checkpoint (checkpoints with high keys).
*/
function upperLookupRecent(Trace160 storage self, uint96 key) internal view returns (uint160) {
uint256 len = self._checkpoints.length;
uint256 low = 0;
uint256 high = len;
if (len > 5) {
uint256 mid = len - MathUpgradeable.sqrt(len);
if (key < _unsafeAccess(self._checkpoints, mid)._key) {
high = mid;
} else {
low = mid + 1;
}
}
uint256 pos = _upperBinaryLookup(self._checkpoints, key, low, high);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the most recent checkpoint, or zero if there are no checkpoints.
*/
function latest(Trace160 storage self) internal view returns (uint160) {
uint256 pos = self._checkpoints.length;
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns whether there is a checkpoint in the structure (i.e. it is not empty), and if so the key and value
* in the most recent checkpoint.
*/
function latestCheckpoint(Trace160 storage self) internal view returns (bool exists, uint96 _key, uint160 _value) {
uint256 pos = self._checkpoints.length;
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint160 memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._key, ckpt._value);
}
}
/**
* @dev Returns the number of checkpoint.
*/
function length(Trace160 storage self) internal view returns (uint256) {
return self._checkpoints.length;
}
/**
* @dev Pushes a (`key`, `value`) pair into an ordered list of checkpoints, either by inserting a new checkpoint,
* or by updating the last one.
*/
function _insert(Checkpoint160[] storage self, uint96 key, uint160 value) private returns (uint160, uint160) {
uint256 pos = self.length;
if (pos > 0) {
// Copying to memory is important here.
Checkpoint160 memory last = _unsafeAccess(self, pos - 1);
// Checkpoint keys must be non-decreasing.
require(last._key <= key, "Checkpoint: decreasing keys");
// Update or push new checkpoint
if (last._key == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint160({_key: key, _value: value}));
}
return (last._value, value);
} else {
self.push(Checkpoint160({_key: key, _value: value}));
return (0, value);
}
}
/**
* @dev Return the index of the last (most recent) checkpoint with key lower or equal than the search key, or `high` if there is none.
* `low` and `high` define a section where to do the search, with inclusive `low` and exclusive `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _upperBinaryLookup(
Checkpoint160[] storage self,
uint96 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = MathUpgradeable.average(low, high);
if (_unsafeAccess(self, mid)._key > key) {
high = mid;
} else {
low = mid + 1;
}
}
return high;
}
/**
* @dev Return the index of the first (oldest) checkpoint with key is greater or equal than the search key, or `high` if there is none.
* `low` and `high` define a section where to do the search, with inclusive `low` and exclusive `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _lowerBinaryLookup(
Checkpoint160[] storage self,
uint96 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = MathUpgradeable.average(low, high);
if (_unsafeAccess(self, mid)._key < key) {
low = mid + 1;
} else {
high = mid;
}
}
return high;
}
/**
* @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
*/
function _unsafeAccess(
Checkpoint160[] storage self,
uint256 pos
) private pure returns (Checkpoint160 storage result) {
assembly {
mstore(0, self.slot)
result.slot := add(keccak256(0, 0x20), pos)
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)
pragma solidity ^0.8.0;
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../StringsUpgradeable.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSAUpgradeable {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV // Deprecated in v4.8
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
/// @solidity memory-safe-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, "\x19Ethereum Signed Message:\n32")
mstore(0x1c, hash)
message := keccak256(0x00, 0x3c)
}
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", StringsUpgradeable.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) {
/// @solidity memory-safe-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, "\x19\x01")
mstore(add(ptr, 0x02), domainSeparator)
mstore(add(ptr, 0x22), structHash)
data := keccak256(ptr, 0x42)
}
}
/**
* @dev Returns an Ethereum Signed Data with intended validator, created from a
* `validator` and `data` according to the version 0 of EIP-191.
*
* See {recover}.
*/
function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x00", validator, data));
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/EIP712.sol)
pragma solidity ^0.8.8;
import "./ECDSAUpgradeable.sol";
import "../../interfaces/IERC5267Upgradeable.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";
/**
* @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
*
* The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
* thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
* they need in their contracts using a combination of `abi.encode` and `keccak256`.
*
* This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
* scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
* ({_hashTypedDataV4}).
*
* The implementation of the domain separator was designed to be as efficient as possible while still properly updating
* the chain id to protect against replay attacks on an eventual fork of the chain.
*
* NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
* https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
*
* NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain
* separator of the implementation contract. This will cause the `_domainSeparatorV4` function to always rebuild the
* separator from the immutable values, which is cheaper than accessing a cached version in cold storage.
*
* _Available since v3.4._
*
* @custom:storage-size 52
*/
abstract contract EIP712Upgradeable is Initializable, IERC5267Upgradeable {
bytes32 private constant _TYPE_HASH =
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
/// @custom:oz-renamed-from _HASHED_NAME
bytes32 private _hashedName;
/// @custom:oz-renamed-from _HASHED_VERSION
bytes32 private _hashedVersion;
string private _name;
string private _version;
/**
* @dev Initializes the domain separator and parameter caches.
*
* The meaning of `name` and `version` is specified in
* https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
*
* - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
* - `version`: the current major version of the signing domain.
*
* NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
* contract upgrade].
*/
function __EIP712_init(string memory name, string memory version) internal onlyInitializing {
__EIP712_init_unchained(name, version);
}
function __EIP712_init_unchained(string memory name, string memory version) internal onlyInitializing {
_name = name;
_version = version;
// Reset prior values in storage if upgrading
_hashedName = 0;
_hashedVersion = 0;
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view returns (bytes32) {
return _buildDomainSeparator();
}
function _buildDomainSeparator() private view returns (bytes32) {
return keccak256(abi.encode(_TYPE_HASH, _EIP712NameHash(), _EIP712VersionHash(), block.chainid, address(this)));
}
/**
* @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
* function returns the hash of the fully encoded EIP712 message for this domain.
*
* This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
*
* ```solidity
* bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
* keccak256("Mail(address to,string contents)"),
* mailTo,
* keccak256(bytes(mailContents))
* )));
* address signer = ECDSA.recover(digest, signature);
* ```
*/
function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
return ECDSAUpgradeable.toTypedDataHash(_domainSeparatorV4(), structHash);
}
/**
* @dev See {EIP-5267}.
*
* _Available since v4.9._
*/
function eip712Domain()
public
view
virtual
override
returns (
bytes1 fields,
string memory name,
string memory version,
uint256 chainId,
address verifyingContract,
bytes32 salt,
uint256[] memory extensions
)
{
// If the hashed name and version in storage are non-zero, the contract hasn't been properly initialized
// and the EIP712 domain is not reliable, as it will be missing name and version.
require(_hashedName == 0 && _hashedVersion == 0, "EIP712: Uninitialized");
return (
hex"0f", // 01111
_EIP712Name(),
_EIP712Version(),
block.chainid,
address(this),
bytes32(0),
new uint256[](0)
);
}
/**
* @dev The name parameter for the EIP712 domain.
*
* NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
* are a concern.
*/
function _EIP712Name() internal virtual view returns (string memory) {
return _name;
}
/**
* @dev The version parameter for the EIP712 domain.
*
* NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
* are a concern.
*/
function _EIP712Version() internal virtual view returns (string memory) {
return _version;
}
/**
* @dev The hash of the name parameter for the EIP712 domain.
*
* NOTE: In previous versions this function was virtual. In this version you should override `_EIP712Name` instead.
*/
function _EIP712NameHash() internal view returns (bytes32) {
string memory name = _EIP712Name();
if (bytes(name).length > 0) {
return keccak256(bytes(name));
} else {
// If the name is empty, the contract may have been upgraded without initializing the new storage.
// We return the name hash in storage if non-zero, otherwise we assume the name is empty by design.
bytes32 hashedName = _hashedName;
if (hashedName != 0) {
return hashedName;
} else {
return keccak256("");
}
}
}
/**
* @dev The hash of the version parameter for the EIP712 domain.
*
* NOTE: In previous versions this function was virtual. In this version you should override `_EIP712Version` instead.
*/
function _EIP712VersionHash() internal view returns (bytes32) {
string memory version = _EIP712Version();
if (bytes(version).length > 0) {
return keccak256(bytes(version));
} else {
// If the version is empty, the contract may have been upgraded without initializing the new storage.
// We return the version hash in storage if non-zero, otherwise we assume the version is empty by design.
bytes32 hashedVersion = _hashedVersion;
if (hashedVersion != 0) {
return hashedVersion;
} else {
return keccak256("");
}
}
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[48] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165Upgradeable.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
function __ERC165_init() internal onlyInitializing {
}
function __ERC165_init_unchained() internal onlyInitializing {
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165Upgradeable).interfaceId;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165Upgradeable {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library MathUpgradeable {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.
pragma solidity ^0.8.0;
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such an operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*
* Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
* all math on `uint256` and `int256` and then downcasting.
*/
library SafeCastUpgradeable {
/**
* @dev Returns the downcasted uint248 from uint256, reverting on
* overflow (when the input is greater than largest uint248).
*
* Counterpart to Solidity's `uint248` operator.
*
* Requirements:
*
* - input must fit into 248 bits
*
* _Available since v4.7._
*/
function toUint248(uint256 value) internal pure returns (uint248) {
require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
return uint248(value);
}
/**
* @dev Returns the downcasted uint240 from uint256, reverting on
* overflow (when the input is greater than largest uint240).
*
* Counterpart to Solidity's `uint240` operator.
*
* Requirements:
*
* - input must fit into 240 bits
*
* _Available since v4.7._
*/
function toUint240(uint256 value) internal pure returns (uint240) {
require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
return uint240(value);
}
/**
* @dev Returns the downcasted uint232 from uint256, reverting on
* overflow (when the input is greater than largest uint232).
*
* Counterpart to Solidity's `uint232` operator.
*
* Requirements:
*
* - input must fit into 232 bits
*
* _Available since v4.7._
*/
function toUint232(uint256 value) internal pure returns (uint232) {
require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
return uint232(value);
}
/**
* @dev Returns the downcasted uint224 from uint256, reverting on
* overflow (when the input is greater than largest uint224).
*
* Counterpart to Solidity's `uint224` operator.
*
* Requirements:
*
* - input must fit into 224 bits
*
* _Available since v4.2._
*/
function toUint224(uint256 value) internal pure returns (uint224) {
require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
return uint224(value);
}
/**
* @dev Returns the downcasted uint216 from uint256, reverting on
* overflow (when the input is greater than largest uint216).
*
* Counterpart to Solidity's `uint216` operator.
*
* Requirements:
*
* - input must fit into 216 bits
*
* _Available since v4.7._
*/
function toUint216(uint256 value) internal pure returns (uint216) {
require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
return uint216(value);
}
/**
* @dev Returns the downcasted uint208 from uint256, reverting on
* overflow (when the input is greater than largest uint208).
*
* Counterpart to Solidity's `uint208` operator.
*
* Requirements:
*
* - input must fit into 208 bits
*
* _Available since v4.7._
*/
function toUint208(uint256 value) internal pure returns (uint208) {
require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
return uint208(value);
}
/**
* @dev Returns the downcasted uint200 from uint256, reverting on
* overflow (when the input is greater than largest uint200).
*
* Counterpart to Solidity's `uint200` operator.
*
* Requirements:
*
* - input must fit into 200 bits
*
* _Available since v4.7._
*/
function toUint200(uint256 value) internal pure returns (uint200) {
require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
return uint200(value);
}
/**
* @dev Returns the downcasted uint192 from uint256, reverting on
* overflow (when the input is greater than largest uint192).
*
* Counterpart to Solidity's `uint192` operator.
*
* Requirements:
*
* - input must fit into 192 bits
*
* _Available since v4.7._
*/
function toUint192(uint256 value) internal pure returns (uint192) {
require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
return uint192(value);
}
/**
* @dev Returns the downcasted uint184 from uint256, reverting on
* overflow (when the input is greater than largest uint184).
*
* Counterpart to Solidity's `uint184` operator.
*
* Requirements:
*
* - input must fit into 184 bits
*
* _Available since v4.7._
*/
function toUint184(uint256 value) internal pure returns (uint184) {
require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
return uint184(value);
}
/**
* @dev Returns the downcasted uint176 from uint256, reverting on
* overflow (when the input is greater than largest uint176).
*
* Counterpart to Solidity's `uint176` operator.
*
* Requirements:
*
* - input must fit into 176 bits
*
* _Available since v4.7._
*/
function toUint176(uint256 value) internal pure returns (uint176) {
require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
return uint176(value);
}
/**
* @dev Returns the downcasted uint168 from uint256, reverting on
* overflow (when the input is greater than largest uint168).
*
* Counterpart to Solidity's `uint168` operator.
*
* Requirements:
*
* - input must fit into 168 bits
*
* _Available since v4.7._
*/
function toUint168(uint256 value) internal pure returns (uint168) {
require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
return uint168(value);
}
/**
* @dev Returns the downcasted uint160 from uint256, reverting on
* overflow (when the input is greater than largest uint160).
*
* Counterpart to Solidity's `uint160` operator.
*
* Requirements:
*
* - input must fit into 160 bits
*
* _Available since v4.7._
*/
function toUint160(uint256 value) internal pure returns (uint160) {
require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
return uint160(value);
}
/**
* @dev Returns the downcasted uint152 from uint256, reverting on
* overflow (when the input is greater than largest uint152).
*
* Counterpart to Solidity's `uint152` operator.
*
* Requirements:
*
* - input must fit into 152 bits
*
* _Available since v4.7._
*/
function toUint152(uint256 value) internal pure returns (uint152) {
require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
return uint152(value);
}
/**
* @dev Returns the downcasted uint144 from uint256, reverting on
* overflow (when the input is greater than largest uint144).
*
* Counterpart to Solidity's `uint144` operator.
*
* Requirements:
*
* - input must fit into 144 bits
*
* _Available since v4.7._
*/
function toUint144(uint256 value) internal pure returns (uint144) {
require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
return uint144(value);
}
/**
* @dev Returns the downcasted uint136 from uint256, reverting on
* overflow (when the input is greater than largest uint136).
*
* Counterpart to Solidity's `uint136` operator.
*
* Requirements:
*
* - input must fit into 136 bits
*
* _Available since v4.7._
*/
function toUint136(uint256 value) internal pure returns (uint136) {
require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
return uint136(value);
}
/**
* @dev Returns the downcasted uint128 from uint256, reverting on
* overflow (when the input is greater than largest uint128).
*
* Counterpart to Solidity's `uint128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*
* _Available since v2.5._
*/
function toUint128(uint256 value) internal pure returns (uint128) {
require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
return uint128(value);
}
/**
* @dev Returns the downcasted uint120 from uint256, reverting on
* overflow (when the input is greater than largest uint120).
*
* Counterpart to Solidity's `uint120` operator.
*
* Requirements:
*
* - input must fit into 120 bits
*
* _Available since v4.7._
*/
function toUint120(uint256 value) internal pure returns (uint120) {
require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
return uint120(value);
}
/**
* @dev Returns the downcasted uint112 from uint256, reverting on
* overflow (when the input is greater than largest uint112).
*
* Counterpart to Solidity's `uint112` operator.
*
* Requirements:
*
* - input must fit into 112 bits
*
* _Available since v4.7._
*/
function toUint112(uint256 value) internal pure returns (uint112) {
require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
return uint112(value);
}
/**
* @dev Returns the downcasted uint104 from uint256, reverting on
* overflow (when the input is greater than largest uint104).
*
* Counterpart to Solidity's `uint104` operator.
*
* Requirements:
*
* - input must fit into 104 bits
*
* _Available since v4.7._
*/
function toUint104(uint256 value) internal pure returns (uint104) {
require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
return uint104(value);
}
/**
* @dev Returns the downcasted uint96 from uint256, reverting on
* overflow (when the input is greater than largest uint96).
*
* Counterpart to Solidity's `uint96` operator.
*
* Requirements:
*
* - input must fit into 96 bits
*
* _Available since v4.2._
*/
function toUint96(uint256 value) internal pure returns (uint96) {
require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
return uint96(value);
}
/**
* @dev Returns the downcasted uint88 from uint256, reverting on
* overflow (when the input is greater than largest uint88).
*
* Counterpart to Solidity's `uint88` operator.
*
* Requirements:
*
* - input must fit into 88 bits
*
* _Available since v4.7._
*/
function toUint88(uint256 value) internal pure returns (uint88) {
require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
return uint88(value);
}
/**
* @dev Returns the downcasted uint80 from uint256, reverting on
* overflow (when the input is greater than largest uint80).
*
* Counterpart to Solidity's `uint80` operator.
*
* Requirements:
*
* - input must fit into 80 bits
*
* _Available since v4.7._
*/
function toUint80(uint256 value) internal pure returns (uint80) {
require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
return uint80(value);
}
/**
* @dev Returns the downcasted uint72 from uint256, reverting on
* overflow (when the input is greater than largest uint72).
*
* Counterpart to Solidity's `uint72` operator.
*
* Requirements:
*
* - input must fit into 72 bits
*
* _Available since v4.7._
*/
function toUint72(uint256 value) internal pure returns (uint72) {
require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
return uint72(value);
}
/**
* @dev Returns the downcasted uint64 from uint256, reverting on
* overflow (when the input is greater than largest uint64).
*
* Counterpart to Solidity's `uint64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*
* _Available since v2.5._
*/
function toUint64(uint256 value) internal pure returns (uint64) {
require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
return uint64(value);
}
/**
* @dev Returns the downcasted uint56 from uint256, reverting on
* overflow (when the input is greater than largest uint56).
*
* Counterpart to Solidity's `uint56` operator.
*
* Requirements:
*
* - input must fit into 56 bits
*
* _Available since v4.7._
*/
function toUint56(uint256 value) internal pure returns (uint56) {
require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
return uint56(value);
}
/**
* @dev Returns the downcasted uint48 from uint256, reverting on
* overflow (when the input is greater than largest uint48).
*
* Counterpart to Solidity's `uint48` operator.
*
* Requirements:
*
* - input must fit into 48 bits
*
* _Available since v4.7._
*/
function toUint48(uint256 value) internal pure returns (uint48) {
require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
return uint48(value);
}
/**
* @dev Returns the downcasted uint40 from uint256, reverting on
* overflow (when the input is greater than largest uint40).
*
* Counterpart to Solidity's `uint40` operator.
*
* Requirements:
*
* - input must fit into 40 bits
*
* _Available since v4.7._
*/
function toUint40(uint256 value) internal pure returns (uint40) {
require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
return uint40(value);
}
/**
* @dev Returns the downcasted uint32 from uint256, reverting on
* overflow (when the input is greater than largest uint32).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*
* _Available since v2.5._
*/
function toUint32(uint256 value) internal pure returns (uint32) {
require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
return uint32(value);
}
/**
* @dev Returns the downcasted uint24 from uint256, reverting on
* overflow (when the input is greater than largest uint24).
*
* Counterpart to Solidity's `uint24` operator.
*
* Requirements:
*
* - input must fit into 24 bits
*
* _Available since v4.7._
*/
function toUint24(uint256 value) internal pure returns (uint24) {
require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
return uint24(value);
}
/**
* @dev Returns the downcasted uint16 from uint256, reverting on
* overflow (when the input is greater than largest uint16).
*
* Counterpart to Solidity's `uint16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*
* _Available since v2.5._
*/
function toUint16(uint256 value) internal pure returns (uint16) {
require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
return uint16(value);
}
/**
* @dev Returns the downcasted uint8 from uint256, reverting on
* overflow (when the input is greater than largest uint8).
*
* Counterpart to Solidity's `uint8` operator.
*
* Requirements:
*
* - input must fit into 8 bits
*
* _Available since v2.5._
*/
function toUint8(uint256 value) internal pure returns (uint8) {
require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
return uint8(value);
}
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*
* _Available since v3.0._
*/
function toUint256(int256 value) internal pure returns (uint256) {
require(value >= 0, "SafeCast: value must be positive");
return uint256(value);
}
/**
* @dev Returns the downcasted int248 from int256, reverting on
* overflow (when the input is less than smallest int248 or
* greater than largest int248).
*
* Counterpart to Solidity's `int248` operator.
*
* Requirements:
*
* - input must fit into 248 bits
*
* _Available since v4.7._
*/
function toInt248(int256 value) internal pure returns (int248 downcasted) {
downcasted = int248(value);
require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
}
/**
* @dev Returns the downcasted int240 from int256, reverting on
* overflow (when the input is less than smallest int240 or
* greater than largest int240).
*
* Counterpart to Solidity's `int240` operator.
*
* Requirements:
*
* - input must fit into 240 bits
*
* _Available since v4.7._
*/
function toInt240(int256 value) internal pure returns (int240 downcasted) {
downcasted = int240(value);
require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
}
/**
* @dev Returns the downcasted int232 from int256, reverting on
* overflow (when the input is less than smallest int232 or
* greater than largest int232).
*
* Counterpart to Solidity's `int232` operator.
*
* Requirements:
*
* - input must fit into 232 bits
*
* _Available since v4.7._
*/
function toInt232(int256 value) internal pure returns (int232 downcasted) {
downcasted = int232(value);
require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
}
/**
* @dev Returns the downcasted int224 from int256, reverting on
* overflow (when the input is less than smallest int224 or
* greater than largest int224).
*
* Counterpart to Solidity's `int224` operator.
*
* Requirements:
*
* - input must fit into 224 bits
*
* _Available since v4.7._
*/
function toInt224(int256 value) internal pure returns (int224 downcasted) {
downcasted = int224(value);
require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
}
/**
* @dev Returns the downcasted int216 from int256, reverting on
* overflow (when the input is less than smallest int216 or
* greater than largest int216).
*
* Counterpart to Solidity's `int216` operator.
*
* Requirements:
*
* - input must fit into 216 bits
*
* _Available since v4.7._
*/
function toInt216(int256 value) internal pure returns (int216 downcasted) {
downcasted = int216(value);
require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
}
/**
* @dev Returns the downcasted int208 from int256, reverting on
* overflow (when the input is less than smallest int208 or
* greater than largest int208).
*
* Counterpart to Solidity's `int208` operator.
*
* Requirements:
*
* - input must fit into 208 bits
*
* _Available since v4.7._
*/
function toInt208(int256 value) internal pure returns (int208 downcasted) {
downcasted = int208(value);
require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
}
/**
* @dev Returns the downcasted int200 from int256, reverting on
* overflow (when the input is less than smallest int200 or
* greater than largest int200).
*
* Counterpart to Solidity's `int200` operator.
*
* Requirements:
*
* - input must fit into 200 bits
*
* _Available since v4.7._
*/
function toInt200(int256 value) internal pure returns (int200 downcasted) {
downcasted = int200(value);
require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
}
/**
* @dev Returns the downcasted int192 from int256, reverting on
* overflow (when the input is less than smallest int192 or
* greater than largest int192).
*
* Counterpart to Solidity's `int192` operator.
*
* Requirements:
*
* - input must fit into 192 bits
*
* _Available since v4.7._
*/
function toInt192(int256 value) internal pure returns (int192 downcasted) {
downcasted = int192(value);
require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
}
/**
* @dev Returns the downcasted int184 from int256, reverting on
* overflow (when the input is less than smallest int184 or
* greater than largest int184).
*
* Counterpart to Solidity's `int184` operator.
*
* Requirements:
*
* - input must fit into 184 bits
*
* _Available since v4.7._
*/
function toInt184(int256 value) internal pure returns (int184 downcasted) {
downcasted = int184(value);
require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
}
/**
* @dev Returns the downcasted int176 from int256, reverting on
* overflow (when the input is less than smallest int176 or
* greater than largest int176).
*
* Counterpart to Solidity's `int176` operator.
*
* Requirements:
*
* - input must fit into 176 bits
*
* _Available since v4.7._
*/
function toInt176(int256 value) internal pure returns (int176 downcasted) {
downcasted = int176(value);
require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
}
/**
* @dev Returns the downcasted int168 from int256, reverting on
* overflow (when the input is less than smallest int168 or
* greater than largest int168).
*
* Counterpart to Solidity's `int168` operator.
*
* Requirements:
*
* - input must fit into 168 bits
*
* _Available since v4.7._
*/
function toInt168(int256 value) internal pure returns (int168 downcasted) {
downcasted = int168(value);
require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
}
/**
* @dev Returns the downcasted int160 from int256, reverting on
* overflow (when the input is less than smallest int160 or
* greater than largest int160).
*
* Counterpart to Solidity's `int160` operator.
*
* Requirements:
*
* - input must fit into 160 bits
*
* _Available since v4.7._
*/
function toInt160(int256 value) internal pure returns (int160 downcasted) {
downcasted = int160(value);
require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
}
/**
* @dev Returns the downcasted int152 from int256, reverting on
* overflow (when the input is less than smallest int152 or
* greater than largest int152).
*
* Counterpart to Solidity's `int152` operator.
*
* Requirements:
*
* - input must fit into 152 bits
*
* _Available since v4.7._
*/
function toInt152(int256 value) internal pure returns (int152 downcasted) {
downcasted = int152(value);
require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
}
/**
* @dev Returns the downcasted int144 from int256, reverting on
* overflow (when the input is less than smallest int144 or
* greater than largest int144).
*
* Counterpart to Solidity's `int144` operator.
*
* Requirements:
*
* - input must fit into 144 bits
*
* _Available since v4.7._
*/
function toInt144(int256 value) internal pure returns (int144 downcasted) {
downcasted = int144(value);
require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
}
/**
* @dev Returns the downcasted int136 from int256, reverting on
* overflow (when the input is less than smallest int136 or
* greater than largest int136).
*
* Counterpart to Solidity's `int136` operator.
*
* Requirements:
*
* - input must fit into 136 bits
*
* _Available since v4.7._
*/
function toInt136(int256 value) internal pure returns (int136 downcasted) {
downcasted = int136(value);
require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
}
/**
* @dev Returns the downcasted int128 from int256, reverting on
* overflow (when the input is less than smallest int128 or
* greater than largest int128).
*
* Counterpart to Solidity's `int128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*
* _Available since v3.1._
*/
function toInt128(int256 value) internal pure returns (int128 downcasted) {
downcasted = int128(value);
require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
}
/**
* @dev Returns the downcasted int120 from int256, reverting on
* overflow (when the input is less than smallest int120 or
* greater than largest int120).
*
* Counterpart to Solidity's `int120` operator.
*
* Requirements:
*
* - input must fit into 120 bits
*
* _Available since v4.7._
*/
function toInt120(int256 value) internal pure returns (int120 downcasted) {
downcasted = int120(value);
require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
}
/**
* @dev Returns the downcasted int112 from int256, reverting on
* overflow (when the input is less than smallest int112 or
* greater than largest int112).
*
* Counterpart to Solidity's `int112` operator.
*
* Requirements:
*
* - input must fit into 112 bits
*
* _Available since v4.7._
*/
function toInt112(int256 value) internal pure returns (int112 downcasted) {
downcasted = int112(value);
require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
}
/**
* @dev Returns the downcasted int104 from int256, reverting on
* overflow (when the input is less than smallest int104 or
* greater than largest int104).
*
* Counterpart to Solidity's `int104` operator.
*
* Requirements:
*
* - input must fit into 104 bits
*
* _Available since v4.7._
*/
function toInt104(int256 value) internal pure returns (int104 downcasted) {
downcasted = int104(value);
require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
}
/**
* @dev Returns the downcasted int96 from int256, reverting on
* overflow (when the input is less than smallest int96 or
* greater than largest int96).
*
* Counterpart to Solidity's `int96` operator.
*
* Requirements:
*
* - input must fit into 96 bits
*
* _Available since v4.7._
*/
function toInt96(int256 value) internal pure returns (int96 downcasted) {
downcasted = int96(value);
require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
}
/**
* @dev Returns the downcasted int88 from int256, reverting on
* overflow (when the input is less than smallest int88 or
* greater than largest int88).
*
* Counterpart to Solidity's `int88` operator.
*
* Requirements:
*
* - input must fit into 88 bits
*
* _Available since v4.7._
*/
function toInt88(int256 value) internal pure returns (int88 downcasted) {
downcasted = int88(value);
require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
}
/**
* @dev Returns the downcasted int80 from int256, reverting on
* overflow (when the input is less than smallest int80 or
* greater than largest int80).
*
* Counterpart to Solidity's `int80` operator.
*
* Requirements:
*
* - input must fit into 80 bits
*
* _Available since v4.7._
*/
function toInt80(int256 value) internal pure returns (int80 downcasted) {
downcasted = int80(value);
require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
}
/**
* @dev Returns the downcasted int72 from int256, reverting on
* overflow (when the input is less than smallest int72 or
* greater than largest int72).
*
* Counterpart to Solidity's `int72` operator.
*
* Requirements:
*
* - input must fit into 72 bits
*
* _Available since v4.7._
*/
function toInt72(int256 value) internal pure returns (int72 downcasted) {
downcasted = int72(value);
require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
}
/**
* @dev Returns the downcasted int64 from int256, reverting on
* overflow (when the input is less than smallest int64 or
* greater than largest int64).
*
* Counterpart to Solidity's `int64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*
* _Available since v3.1._
*/
function toInt64(int256 value) internal pure returns (int64 downcasted) {
downcasted = int64(value);
require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
}
/**
* @dev Returns the downcasted int56 from int256, reverting on
* overflow (when the input is less than smallest int56 or
* greater than largest int56).
*
* Counterpart to Solidity's `int56` operator.
*
* Requirements:
*
* - input must fit into 56 bits
*
* _Available since v4.7._
*/
function toInt56(int256 value) internal pure returns (int56 downcasted) {
downcasted = int56(value);
require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
}
/**
* @dev Returns the downcasted int48 from int256, reverting on
* overflow (when the input is less than smallest int48 or
* greater than largest int48).
*
* Counterpart to Solidity's `int48` operator.
*
* Requirements:
*
* - input must fit into 48 bits
*
* _Available since v4.7._
*/
function toInt48(int256 value) internal pure returns (int48 downcasted) {
downcasted = int48(value);
require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
}
/**
* @dev Returns the downcasted int40 from int256, reverting on
* overflow (when the input is less than smallest int40 or
* greater than largest int40).
*
* Counterpart to Solidity's `int40` operator.
*
* Requirements:
*
* - input must fit into 40 bits
*
* _Available since v4.7._
*/
function toInt40(int256 value) internal pure returns (int40 downcasted) {
downcasted = int40(value);
require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
}
/**
* @dev Returns the downcasted int32 from int256, reverting on
* overflow (when the input is less than smallest int32 or
* greater than largest int32).
*
* Counterpart to Solidity's `int32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*
* _Available since v3.1._
*/
function toInt32(int256 value) internal pure returns (int32 downcasted) {
downcasted = int32(value);
require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
}
/**
* @dev Returns the downcasted int24 from int256, reverting on
* overflow (when the input is less than smallest int24 or
* greater than largest int24).
*
* Counterpart to Solidity's `int24` operator.
*
* Requirements:
*
* - input must fit into 24 bits
*
* _Available since v4.7._
*/
function toInt24(int256 value) internal pure returns (int24 downcasted) {
downcasted = int24(value);
require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
}
/**
* @dev Returns the downcasted int16 from int256, reverting on
* overflow (when the input is less than smallest int16 or
* greater than largest int16).
*
* Counterpart to Solidity's `int16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*
* _Available since v3.1._
*/
function toInt16(int256 value) internal pure returns (int16 downcasted) {
downcasted = int16(value);
require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
}
/**
* @dev Returns the downcasted int8 from int256, reverting on
* overflow (when the input is less than smallest int8 or
* greater than largest int8).
*
* Counterpart to Solidity's `int8` operator.
*
* Requirements:
*
* - input must fit into 8 bits
*
* _Available since v3.1._
*/
function toInt8(int256 value) internal pure returns (int8 downcasted) {
downcasted = int8(value);
require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*
* _Available since v3.0._
*/
function toInt256(uint256 value) internal pure returns (int256) {
// Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard signed math utilities missing in the Solidity language.
*/
library SignedMathUpgradeable {
/**
* @dev Returns the largest of two signed numbers.
*/
function max(int256 a, int256 b) internal pure returns (int256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two signed numbers.
*/
function min(int256 a, int256 b) internal pure returns (int256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two signed numbers without overflow.
* The result is rounded towards zero.
*/
function average(int256 a, int256 b) internal pure returns (int256) {
// Formula from the book "Hacker's Delight"
int256 x = (a & b) + ((a ^ b) >> 1);
return x + (int256(uint256(x) >> 255) & (a ^ b));
}
/**
* @dev Returns the absolute unsigned value of a signed value.
*/
function abs(int256 n) internal pure returns (uint256) {
unchecked {
// must be unchecked in order to support `n = type(int256).min`
return uint256(n >= 0 ? n : -n);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
import "./math/MathUpgradeable.sol";
import "./math/SignedMathUpgradeable.sol";
/**
* @dev String operations.
*/
library StringsUpgradeable {
bytes16 private constant _SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
unchecked {
uint256 length = MathUpgradeable.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `int256` to its ASCII `string` decimal representation.
*/
function toString(int256 value) internal pure returns (string memory) {
return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMathUpgradeable.abs(value))));
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, MathUpgradeable.log256(value) + 1);
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
/**
* @dev Returns true if the two strings are equal.
*/
function equal(string memory a, string memory b) internal pure returns (bool) {
return keccak256(bytes(a)) == keccak256(bytes(b));
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/DoubleEndedQueue.sol)
pragma solidity ^0.8.4;
import "../math/SafeCastUpgradeable.sol";
/**
* @dev A sequence of items with the ability to efficiently push and pop items (i.e. insert and remove) on both ends of
* the sequence (called front and back). Among other access patterns, it can be used to implement efficient LIFO and
* FIFO queues. Storage use is optimized, and all operations are O(1) constant time. This includes {clear}, given that
* the existing queue contents are left in storage.
*
* The struct is called `Bytes32Deque`. Other types can be cast to and from `bytes32`. This data structure can only be
* used in storage, and not in memory.
* ```solidity
* DoubleEndedQueue.Bytes32Deque queue;
* ```
*
* _Available since v4.6._
*/
library DoubleEndedQueueUpgradeable {
/**
* @dev An operation (e.g. {front}) couldn't be completed due to the queue being empty.
*/
error Empty();
/**
* @dev An operation (e.g. {at}) couldn't be completed due to an index being out of bounds.
*/
error OutOfBounds();
/**
* @dev Indices are signed integers because the queue can grow in any direction. They are 128 bits so begin and end
* are packed in a single storage slot for efficient access. Since the items are added one at a time we can safely
* assume that these 128-bit indices will not overflow, and use unchecked arithmetic.
*
* Struct members have an underscore prefix indicating that they are "private" and should not be read or written to
* directly. Use the functions provided below instead. Modifying the struct manually may violate assumptions and
* lead to unexpected behavior.
*
* Indices are in the range [begin, end) which means the first item is at data[begin] and the last item is at
* data[end - 1].
*/
struct Bytes32Deque {
int128 _begin;
int128 _end;
mapping(int128 => bytes32) _data;
}
/**
* @dev Inserts an item at the end of the queue.
*/
function pushBack(Bytes32Deque storage deque, bytes32 value) internal {
int128 backIndex = deque._end;
deque._data[backIndex] = value;
unchecked {
deque._end = backIndex + 1;
}
}
/**
* @dev Removes the item at the end of the queue and returns it.
*
* Reverts with `Empty` if the queue is empty.
*/
function popBack(Bytes32Deque storage deque) internal returns (bytes32 value) {
if (empty(deque)) revert Empty();
int128 backIndex;
unchecked {
backIndex = deque._end - 1;
}
value = deque._data[backIndex];
delete deque._data[backIndex];
deque._end = backIndex;
}
/**
* @dev Inserts an item at the beginning of the queue.
*/
function pushFront(Bytes32Deque storage deque, bytes32 value) internal {
int128 frontIndex;
unchecked {
frontIndex = deque._begin - 1;
}
deque._data[frontIndex] = value;
deque._begin = frontIndex;
}
/**
* @dev Removes the item at the beginning of the queue and returns it.
*
* Reverts with `Empty` if the queue is empty.
*/
function popFront(Bytes32Deque storage deque) internal returns (bytes32 value) {
if (empty(deque)) revert Empty();
int128 frontIndex = deque._begin;
value = deque._data[frontIndex];
delete deque._data[frontIndex];
unchecked {
deque._begin = frontIndex + 1;
}
}
/**
* @dev Returns the item at the beginning of the queue.
*
* Reverts with `Empty` if the queue is empty.
*/
function front(Bytes32Deque storage deque) internal view returns (bytes32 value) {
if (empty(deque)) revert Empty();
int128 frontIndex = deque._begin;
return deque._data[frontIndex];
}
/**
* @dev Returns the item at the end of the queue.
*
* Reverts with `Empty` if the queue is empty.
*/
function back(Bytes32Deque storage deque) internal view returns (bytes32 value) {
if (empty(deque)) revert Empty();
int128 backIndex;
unchecked {
backIndex = deque._end - 1;
}
return deque._data[backIndex];
}
/**
* @dev Return the item at a position in the queue given by `index`, with the first item at 0 and last item at
* `length(deque) - 1`.
*
* Reverts with `OutOfBounds` if the index is out of bounds.
*/
function at(Bytes32Deque storage deque, uint256 index) internal view returns (bytes32 value) {
// int256(deque._begin) is a safe upcast
int128 idx = SafeCastUpgradeable.toInt128(int256(deque._begin) + SafeCastUpgradeable.toInt256(index));
if (idx >= deque._end) revert OutOfBounds();
return deque._data[idx];
}
/**
* @dev Resets the queue back to being empty.
*
* NOTE: The current items are left behind in storage. This does not affect the functioning of the queue, but misses
* out on potential gas refunds.
*/
function clear(Bytes32Deque storage deque) internal {
deque._begin = 0;
deque._end = 0;
}
/**
* @dev Returns the number of items in the queue.
*/
function length(Bytes32Deque storage deque) internal view returns (uint256) {
// The interface preserves the invariant that begin <= end so we assume this will not overflow.
// We also assume there are at most int256.max items in the queue.
unchecked {
return uint256(int256(deque._end) - int256(deque._begin));
}
}
/**
* @dev Returns true if the queue is empty.
*/
function empty(Bytes32Deque storage deque) internal view returns (bool) {
return deque._end <= deque._begin;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (governance/utils/IVotes.sol)
pragma solidity ^0.8.20;
/**
* @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts.
*/
interface IVotes {
/**
* @dev The signature used has expired.
*/
error VotesExpiredSignature(uint256 expiry);
/**
* @dev Emitted when an account changes their delegate.
*/
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/**
* @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of voting units.
*/
event DelegateVotesChanged(address indexed delegate, uint256 previousVotes, uint256 newVotes);
/**
* @dev Returns the current amount of votes that `account` has.
*/
function getVotes(address account) external view returns (uint256);
/**
* @dev Returns the amount of votes that `account` had at a specific moment in the past. If the `clock()` is
* configured to use block numbers, this will return the value at the end of the corresponding block.
*/
function getPastVotes(address account, uint256 timepoint) external view returns (uint256);
/**
* @dev Returns the total supply of votes available at a specific moment in the past. If the `clock()` is
* configured to use block numbers, this will return the value at the end of the corresponding block.
*
* NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes.
* Votes that have not been delegated are still part of total supply, even though they would not participate in a
* vote.
*/
function getPastTotalSupply(uint256 timepoint) external view returns (uint256);
/**
* @dev Returns the delegate that `account` has chosen.
*/
function delegates(address account) external view returns (address);
/**
* @dev Delegates votes from the sender to `delegatee`.
*/
function delegate(address delegatee) external;
/**
* @dev Delegates votes from signer to `delegatee`.
*/
function delegateBySig(address delegatee, uint256 nonce, uint256 expiry, uint8 v, bytes32 r, bytes32 s) external;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)
pragma solidity ^0.8.20;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev The ETH balance of the account is not enough to perform the operation.
*/
error AddressInsufficientBalance(address account);
/**
* @dev There's no code at `target` (it is not a contract).
*/
error AddressEmptyCode(address target);
/**
* @dev A call to an address target failed. The target may have reverted.
*/
error FailedInnerCall();
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
if (address(this).balance < amount) {
revert AddressInsufficientBalance(address(this));
}
(bool success, ) = recipient.call{value: amount}("");
if (!success) {
revert FailedInnerCall();
}
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason or custom error, it is bubbled
* up by this function (like regular Solidity function calls). However, if
* the call reverted with no returned reason, this function reverts with a
* {FailedInnerCall} error.
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
if (address(this).balance < value) {
revert AddressInsufficientBalance(address(this));
}
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
* was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
* unsuccessful call.
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata
) internal view returns (bytes memory) {
if (!success) {
_revert(returndata);
} else {
// only check if target is a contract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
if (returndata.length == 0 && target.code.length == 0) {
revert AddressEmptyCode(target);
}
return returndata;
}
}
/**
* @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
* revert reason or with a default {FailedInnerCall} error.
*/
function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
if (!success) {
_revert(returndata);
} else {
return returndata;
}
}
/**
* @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
*/
function _revert(bytes memory returndata) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert FailedInnerCall();
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)
pragma solidity ^0.8.20;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Muldiv operation overflow.
*/
error MathOverflowedMulDiv();
enum Rounding {
Floor, // Toward negative infinity
Ceil, // Toward positive infinity
Trunc, // Toward zero
Expand // Away from zero
}
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the subtraction of two unsigned integers, with an overflow flag.
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds towards infinity instead
* of rounding towards zero.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
if (b == 0) {
// Guarantee the same behavior as in a regular Solidity division.
return a / b;
}
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
* denominator == 0.
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
* Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0 = x * y; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
if (denominator <= prod1) {
revert MathOverflowedMulDiv();
}
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator.
// Always >= 1. See https://cs.stackexchange.com/q/138556/92363.
uint256 twos = denominator & (0 - denominator);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
// works in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
* towards zero.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2 of a positive value rounded towards zero.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10 of a positive value rounded towards zero.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256 of a positive value rounded towards zero.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
}
}
/**
* @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
*/
function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
return uint8(rounding) % 2 == 1;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/structs/Checkpoints.sol)
// This file was procedurally generated from scripts/generate/templates/Checkpoints.js.
pragma solidity ^0.8.20;
import {Math} from "../math/Math.sol";
/**
* @dev This library defines the `Trace*` struct, for checkpointing values as they change at different points in
* time, and later looking up past values by block number. See {Votes} as an example.
*
* To create a history of checkpoints define a variable type `Checkpoints.Trace*` in your contract, and store a new
* checkpoint for the current transaction block using the {push} function.
*/
library Checkpoints {
/**
* @dev A value was attempted to be inserted on a past checkpoint.
*/
error CheckpointUnorderedInsertion();
struct Trace224 {
Checkpoint224[] _checkpoints;
}
struct Checkpoint224 {
uint32 _key;
uint224 _value;
}
/**
* @dev Pushes a (`key`, `value`) pair into a Trace224 so that it is stored as the checkpoint.
*
* Returns previous value and new value.
*
* IMPORTANT: Never accept `key` as a user input, since an arbitrary `type(uint32).max` key set will disable the
* library.
*/
function push(Trace224 storage self, uint32 key, uint224 value) internal returns (uint224, uint224) {
return _insert(self._checkpoints, key, value);
}
/**
* @dev Returns the value in the first (oldest) checkpoint with key greater or equal than the search key, or zero if
* there is none.
*/
function lowerLookup(Trace224 storage self, uint32 key) internal view returns (uint224) {
uint256 len = self._checkpoints.length;
uint256 pos = _lowerBinaryLookup(self._checkpoints, key, 0, len);
return pos == len ? 0 : _unsafeAccess(self._checkpoints, pos)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero
* if there is none.
*/
function upperLookup(Trace224 storage self, uint32 key) internal view returns (uint224) {
uint256 len = self._checkpoints.length;
uint256 pos = _upperBinaryLookup(self._checkpoints, key, 0, len);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero
* if there is none.
*
* NOTE: This is a variant of {upperLookup} that is optimised to find "recent" checkpoint (checkpoints with high
* keys).
*/
function upperLookupRecent(Trace224 storage self, uint32 key) internal view returns (uint224) {
uint256 len = self._checkpoints.length;
uint256 low = 0;
uint256 high = len;
if (len > 5) {
uint256 mid = len - Math.sqrt(len);
if (key < _unsafeAccess(self._checkpoints, mid)._key) {
high = mid;
} else {
low = mid + 1;
}
}
uint256 pos = _upperBinaryLookup(self._checkpoints, key, low, high);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the most recent checkpoint, or zero if there are no checkpoints.
*/
function latest(Trace224 storage self) internal view returns (uint224) {
uint256 pos = self._checkpoints.length;
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns whether there is a checkpoint in the structure (i.e. it is not empty), and if so the key and value
* in the most recent checkpoint.
*/
function latestCheckpoint(Trace224 storage self) internal view returns (bool exists, uint32 _key, uint224 _value) {
uint256 pos = self._checkpoints.length;
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint224 memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._key, ckpt._value);
}
}
/**
* @dev Returns the number of checkpoint.
*/
function length(Trace224 storage self) internal view returns (uint256) {
return self._checkpoints.length;
}
/**
* @dev Returns checkpoint at given position.
*/
function at(Trace224 storage self, uint32 pos) internal view returns (Checkpoint224 memory) {
return self._checkpoints[pos];
}
/**
* @dev Pushes a (`key`, `value`) pair into an ordered list of checkpoints, either by inserting a new checkpoint,
* or by updating the last one.
*/
function _insert(Checkpoint224[] storage self, uint32 key, uint224 value) private returns (uint224, uint224) {
uint256 pos = self.length;
if (pos > 0) {
// Copying to memory is important here.
Checkpoint224 memory last = _unsafeAccess(self, pos - 1);
// Checkpoint keys must be non-decreasing.
if (last._key > key) {
revert CheckpointUnorderedInsertion();
}
// Update or push new checkpoint
if (last._key == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint224({_key: key, _value: value}));
}
return (last._value, value);
} else {
self.push(Checkpoint224({_key: key, _value: value}));
return (0, value);
}
}
/**
* @dev Return the index of the last (most recent) checkpoint with key lower or equal than the search key, or `high`
* if there is none. `low` and `high` define a section where to do the search, with inclusive `low` and exclusive
* `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _upperBinaryLookup(
Checkpoint224[] storage self,
uint32 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = Math.average(low, high);
if (_unsafeAccess(self, mid)._key > key) {
high = mid;
} else {
low = mid + 1;
}
}
return high;
}
/**
* @dev Return the index of the first (oldest) checkpoint with key is greater or equal than the search key, or
* `high` if there is none. `low` and `high` define a section where to do the search, with inclusive `low` and
* exclusive `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _lowerBinaryLookup(
Checkpoint224[] storage self,
uint32 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = Math.average(low, high);
if (_unsafeAccess(self, mid)._key < key) {
low = mid + 1;
} else {
high = mid;
}
}
return high;
}
/**
* @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
*/
function _unsafeAccess(
Checkpoint224[] storage self,
uint256 pos
) private pure returns (Checkpoint224 storage result) {
assembly {
mstore(0, self.slot)
result.slot := add(keccak256(0, 0x20), pos)
}
}
struct Trace208 {
Checkpoint208[] _checkpoints;
}
struct Checkpoint208 {
uint48 _key;
uint208 _value;
}
/**
* @dev Pushes a (`key`, `value`) pair into a Trace208 so that it is stored as the checkpoint.
*
* Returns previous value and new value.
*
* IMPORTANT: Never accept `key` as a user input, since an arbitrary `type(uint48).max` key set will disable the
* library.
*/
function push(Trace208 storage self, uint48 key, uint208 value) internal returns (uint208, uint208) {
return _insert(self._checkpoints, key, value);
}
/**
* @dev Returns the value in the first (oldest) checkpoint with key greater or equal than the search key, or zero if
* there is none.
*/
function lowerLookup(Trace208 storage self, uint48 key) internal view returns (uint208) {
uint256 len = self._checkpoints.length;
uint256 pos = _lowerBinaryLookup(self._checkpoints, key, 0, len);
return pos == len ? 0 : _unsafeAccess(self._checkpoints, pos)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero
* if there is none.
*/
function upperLookup(Trace208 storage self, uint48 key) internal view returns (uint208) {
uint256 len = self._checkpoints.length;
uint256 pos = _upperBinaryLookup(self._checkpoints, key, 0, len);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero
* if there is none.
*
* NOTE: This is a variant of {upperLookup} that is optimised to find "recent" checkpoint (checkpoints with high
* keys).
*/
function upperLookupRecent(Trace208 storage self, uint48 key) internal view returns (uint208) {
uint256 len = self._checkpoints.length;
uint256 low = 0;
uint256 high = len;
if (len > 5) {
uint256 mid = len - Math.sqrt(len);
if (key < _unsafeAccess(self._checkpoints, mid)._key) {
high = mid;
} else {
low = mid + 1;
}
}
uint256 pos = _upperBinaryLookup(self._checkpoints, key, low, high);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the most recent checkpoint, or zero if there are no checkpoints.
*/
function latest(Trace208 storage self) internal view returns (uint208) {
uint256 pos = self._checkpoints.length;
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns whether there is a checkpoint in the structure (i.e. it is not empty), and if so the key and value
* in the most recent checkpoint.
*/
function latestCheckpoint(Trace208 storage self) internal view returns (bool exists, uint48 _key, uint208 _value) {
uint256 pos = self._checkpoints.length;
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint208 memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._key, ckpt._value);
}
}
/**
* @dev Returns the number of checkpoint.
*/
function length(Trace208 storage self) internal view returns (uint256) {
return self._checkpoints.length;
}
/**
* @dev Returns checkpoint at given position.
*/
function at(Trace208 storage self, uint32 pos) internal view returns (Checkpoint208 memory) {
return self._checkpoints[pos];
}
/**
* @dev Pushes a (`key`, `value`) pair into an ordered list of checkpoints, either by inserting a new checkpoint,
* or by updating the last one.
*/
function _insert(Checkpoint208[] storage self, uint48 key, uint208 value) private returns (uint208, uint208) {
uint256 pos = self.length;
if (pos > 0) {
// Copying to memory is important here.
Checkpoint208 memory last = _unsafeAccess(self, pos - 1);
// Checkpoint keys must be non-decreasing.
if (last._key > key) {
revert CheckpointUnorderedInsertion();
}
// Update or push new checkpoint
if (last._key == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint208({_key: key, _value: value}));
}
return (last._value, value);
} else {
self.push(Checkpoint208({_key: key, _value: value}));
return (0, value);
}
}
/**
* @dev Return the index of the last (most recent) checkpoint with key lower or equal than the search key, or `high`
* if there is none. `low` and `high` define a section where to do the search, with inclusive `low` and exclusive
* `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _upperBinaryLookup(
Checkpoint208[] storage self,
uint48 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = Math.average(low, high);
if (_unsafeAccess(self, mid)._key > key) {
high = mid;
} else {
low = mid + 1;
}
}
return high;
}
/**
* @dev Return the index of the first (oldest) checkpoint with key is greater or equal than the search key, or
* `high` if there is none. `low` and `high` define a section where to do the search, with inclusive `low` and
* exclusive `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _lowerBinaryLookup(
Checkpoint208[] storage self,
uint48 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = Math.average(low, high);
if (_unsafeAccess(self, mid)._key < key) {
low = mid + 1;
} else {
high = mid;
}
}
return high;
}
/**
* @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
*/
function _unsafeAccess(
Checkpoint208[] storage self,
uint256 pos
) private pure returns (Checkpoint208 storage result) {
assembly {
mstore(0, self.slot)
result.slot := add(keccak256(0, 0x20), pos)
}
}
struct Trace160 {
Checkpoint160[] _checkpoints;
}
struct Checkpoint160 {
uint96 _key;
uint160 _value;
}
/**
* @dev Pushes a (`key`, `value`) pair into a Trace160 so that it is stored as the checkpoint.
*
* Returns previous value and new value.
*
* IMPORTANT: Never accept `key` as a user input, since an arbitrary `type(uint96).max` key set will disable the
* library.
*/
function push(Trace160 storage self, uint96 key, uint160 value) internal returns (uint160, uint160) {
return _insert(self._checkpoints, key, value);
}
/**
* @dev Returns the value in the first (oldest) checkpoint with key greater or equal than the search key, or zero if
* there is none.
*/
function lowerLookup(Trace160 storage self, uint96 key) internal view returns (uint160) {
uint256 len = self._checkpoints.length;
uint256 pos = _lowerBinaryLookup(self._checkpoints, key, 0, len);
return pos == len ? 0 : _unsafeAccess(self._checkpoints, pos)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero
* if there is none.
*/
function upperLookup(Trace160 storage self, uint96 key) internal view returns (uint160) {
uint256 len = self._checkpoints.length;
uint256 pos = _upperBinaryLookup(self._checkpoints, key, 0, len);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero
* if there is none.
*
* NOTE: This is a variant of {upperLookup} that is optimised to find "recent" checkpoint (checkpoints with high
* keys).
*/
function upperLookupRecent(Trace160 storage self, uint96 key) internal view returns (uint160) {
uint256 len = self._checkpoints.length;
uint256 low = 0;
uint256 high = len;
if (len > 5) {
uint256 mid = len - Math.sqrt(len);
if (key < _unsafeAccess(self._checkpoints, mid)._key) {
high = mid;
} else {
low = mid + 1;
}
}
uint256 pos = _upperBinaryLookup(self._checkpoints, key, low, high);
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns the value in the most recent checkpoint, or zero if there are no checkpoints.
*/
function latest(Trace160 storage self) internal view returns (uint160) {
uint256 pos = self._checkpoints.length;
return pos == 0 ? 0 : _unsafeAccess(self._checkpoints, pos - 1)._value;
}
/**
* @dev Returns whether there is a checkpoint in the structure (i.e. it is not empty), and if so the key and value
* in the most recent checkpoint.
*/
function latestCheckpoint(Trace160 storage self) internal view returns (bool exists, uint96 _key, uint160 _value) {
uint256 pos = self._checkpoints.length;
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint160 memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._key, ckpt._value);
}
}
/**
* @dev Returns the number of checkpoint.
*/
function length(Trace160 storage self) internal view returns (uint256) {
return self._checkpoints.length;
}
/**
* @dev Returns checkpoint at given position.
*/
function at(Trace160 storage self, uint32 pos) internal view returns (Checkpoint160 memory) {
return self._checkpoints[pos];
}
/**
* @dev Pushes a (`key`, `value`) pair into an ordered list of checkpoints, either by inserting a new checkpoint,
* or by updating the last one.
*/
function _insert(Checkpoint160[] storage self, uint96 key, uint160 value) private returns (uint160, uint160) {
uint256 pos = self.length;
if (pos > 0) {
// Copying to memory is important here.
Checkpoint160 memory last = _unsafeAccess(self, pos - 1);
// Checkpoint keys must be non-decreasing.
if (last._key > key) {
revert CheckpointUnorderedInsertion();
}
// Update or push new checkpoint
if (last._key == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint160({_key: key, _value: value}));
}
return (last._value, value);
} else {
self.push(Checkpoint160({_key: key, _value: value}));
return (0, value);
}
}
/**
* @dev Return the index of the last (most recent) checkpoint with key lower or equal than the search key, or `high`
* if there is none. `low` and `high` define a section where to do the search, with inclusive `low` and exclusive
* `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _upperBinaryLookup(
Checkpoint160[] storage self,
uint96 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = Math.average(low, high);
if (_unsafeAccess(self, mid)._key > key) {
high = mid;
} else {
low = mid + 1;
}
}
return high;
}
/**
* @dev Return the index of the first (oldest) checkpoint with key is greater or equal than the search key, or
* `high` if there is none. `low` and `high` define a section where to do the search, with inclusive `low` and
* exclusive `high`.
*
* WARNING: `high` should not be greater than the array's length.
*/
function _lowerBinaryLookup(
Checkpoint160[] storage self,
uint96 key,
uint256 low,
uint256 high
) private view returns (uint256) {
while (low < high) {
uint256 mid = Math.average(low, high);
if (_unsafeAccess(self, mid)._key < key) {
low = mid + 1;
} else {
high = mid;
}
}
return high;
}
/**
* @dev Access an element of the array without performing bounds check. The position is assumed to be within bounds.
*/
function _unsafeAccess(
Checkpoint160[] storage self,
uint256 pos
) private pure returns (Checkpoint160 storage result) {
assembly {
mstore(0, self.slot)
result.slot := add(keccak256(0, 0x20), pos)
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
import '@openzeppelin/contracts-upgradeable/governance/GovernorUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
/**
* @title CrossChainGovernorCountingSimple
* @dev CrossChainGovernorCountingSimple is an abstract contract that provides counting and vote functionality for a cross-chain governor.
* It extends the Governor and Ownable contracts.
*/
abstract contract CrossChainGovernorCountingSimple is
Initializable,
GovernorUpgradeable,
OwnableUpgradeable
{
mapping(bytes32 => mapping(uint16 => bool)) public spokeContractsMapping;
CrossChainAddress[] public spokeContracts;
mapping(uint256 => mapping(bytes32 => mapping(uint16 => bool)))
public spokeContractsMappingSnapshots;
mapping(uint256 => CrossChainAddress[]) public spokeContractsSnapshots;
mapping(uint256 => mapping(bytes32 => mapping(uint16 => SpokeProposalVote)))
public spokeVotes;
mapping(uint256 => ProposalVote) private _proposalVotes;
struct CrossChainAddress {
bytes32 contractAddress;
uint16 chainId;
}
struct SpokeProposalVote {
uint256 forVotes;
uint256 againstVotes;
uint256 abstainVotes;
bool initialized;
}
/**
* @dev Supported vote types. Matches Governor Bravo ordering.
*/
enum VoteType {
Against,
For,
Abstain
}
struct ProposalVote {
uint256 againstVotes;
uint256 forVotes;
uint256 abstainVotes;
mapping(address => bool) hasVoted;
}
event SpokesUpdated(CrossChainAddress[] indexed spokes);
function __CrossChainGovernorCountingSimple_init(
CrossChainAddress[] memory _spokeContracts
) internal onlyInitializing {
__Ownable_init();
__CrossChainGovernorCountingSimple_init_unchained(_spokeContracts);
}
function __CrossChainGovernorCountingSimple_init_unchained(
CrossChainAddress[] memory _spokeContracts
) internal onlyInitializing {
updateSpokeContracts(_spokeContracts);
}
/**
* @dev Creates the spoke contracts snapshot for given proposalId.
* @param proposalId id of a proposal that will use the snapshot.
*/
function createSnapshot(uint256 proposalId) internal {
uint256 spokeContractsLength = spokeContracts.length;
for (uint256 i = 1; i <= spokeContractsLength; ++i) {
CrossChainAddress memory addressToSnapshot = spokeContracts[i - 1];
spokeContractsMappingSnapshots[proposalId][
addressToSnapshot.contractAddress
][addressToSnapshot.chainId] = true;
}
spokeContractsSnapshots[proposalId] = spokeContracts;
}
/**
* @dev Updates the spoke contracts.
* @param _spokeContracts An array of CrossChainAddress structs representing the spoke contracts.
*/
function updateSpokeContracts(
CrossChainAddress[] memory _spokeContracts
) public onlyOwner {
uint256 spokeContractsLength = spokeContracts.length;
//clear existing mapping
for (uint256 i = 1; i <= spokeContractsLength; ++i) {
CrossChainAddress memory addressToRemove = spokeContracts[i - 1];
spokeContractsMapping[addressToRemove.contractAddress][
addressToRemove.chainId
] = false;
}
delete spokeContracts;
uint256 newSpokeContractsLength = _spokeContracts.length;
for (uint256 i = 1; i <= newSpokeContractsLength; ++i) {
CrossChainAddress memory addressToAdd = _spokeContracts[i - 1];
if (
spokeContractsMapping[addressToAdd.contractAddress][
addressToAdd.chainId
] == true
) {
//check if duplicate
revert('Duplicates are not allowed');
}
spokeContractsMapping[addressToAdd.contractAddress][
addressToAdd.chainId
] = true;
spokeContracts.push(addressToAdd);
}
emit SpokesUpdated(spokeContracts);
}
/**
* @dev See {IGovernor-COUNTING_MODE}.
*/
// solhint-disable-next-line func-name-mixedcase
function COUNTING_MODE()
public
pure
virtual
override
returns (string memory)
{
return 'support=bravo&quorum=for,abstain';
}
/**
* @dev See {IGovernor-hasVoted}.
*/
function hasVoted(
uint256 proposalId,
address account
) public view virtual override returns (bool) {
return _proposalVotes[proposalId].hasVoted[account];
}
/**
* @dev Retrieves the vote counts for a proposal.
* @param proposalId The ID of the proposal.
* @return againstVotes Against vote count.
* @return forVotes For vote count.
* @return abstainVotes Abstain vote count.
*/
function proposalVotes(
uint256 proposalId
)
public
view
virtual
returns (uint256 againstVotes, uint256 forVotes, uint256 abstainVotes)
{
ProposalVote storage proposalVote = _proposalVotes[proposalId];
uint256 sumAgainstVotes = proposalVote.againstVotes;
uint256 sumForVotes = proposalVote.forVotes;
uint256 sumAbstainVotes = proposalVote.abstainVotes;
uint256 spokeContractsLength = spokeContracts.length;
for (uint16 i = 1; i <= spokeContractsLength; ++i) {
CrossChainAddress memory currentContract = spokeContracts[i - 1];
SpokeProposalVote storage v = spokeVotes[proposalId][
currentContract.contractAddress
][currentContract.chainId];
sumAgainstVotes += v.againstVotes;
sumForVotes += v.forVotes;
sumAbstainVotes += v.abstainVotes;
}
return (sumAgainstVotes, sumForVotes, sumAbstainVotes);
}
/**
* @dev See {Governor-_quorumReached}.
*/
function _quorumReached(
uint256 proposalId
) internal view virtual override returns (bool) {
ProposalVote storage proposalVote = _proposalVotes[proposalId];
uint256 abstainVotes = proposalVote.abstainVotes;
uint256 forVotes = proposalVote.forVotes;
uint256 spokeContractsLength = spokeContracts.length;
for (uint16 i = 1; i <= spokeContractsLength; ++i) {
CrossChainAddress memory currentContract = spokeContracts[i - 1];
SpokeProposalVote storage v = spokeVotes[proposalId][
currentContract.contractAddress
][currentContract.chainId];
abstainVotes += v.abstainVotes;
forVotes += v.forVotes;
}
return quorum(proposalSnapshot(proposalId)) <= forVotes + abstainVotes;
}
/**
* @dev See {Governor-_voteSucceeded}. In this module, the forVotes must be strictly over the againstVotes.
*/
function _voteSucceeded(
uint256 proposalId
) internal view virtual override returns (bool) {
ProposalVote storage proposalVote = _proposalVotes[proposalId];
uint256 againstVotes = proposalVote.againstVotes;
uint256 forVotes = proposalVote.forVotes;
uint256 spokeContractsLength = spokeContracts.length;
for (uint16 i = 1; i <= spokeContractsLength; ++i) {
CrossChainAddress memory currentContract = spokeContracts[i - 1];
SpokeProposalVote storage v = spokeVotes[proposalId][
currentContract.contractAddress
][currentContract.chainId];
againstVotes += v.againstVotes;
forVotes += v.forVotes;
}
return forVotes > againstVotes;
}
/**
* @dev See {Governor-_countVote}. In this module, the support follows the `VoteType` enum (from Governor Bravo).
*/
function _countVote(
uint256 proposalId,
address account,
uint8 support,
uint256 weight,
bytes memory // params
) internal virtual override {
ProposalVote storage proposalVote = _proposalVotes[proposalId];
require(
!proposalVote.hasVoted[account],
'GovernorVotingSimple: vote already cast'
);
proposalVote.hasVoted[account] = true;
if (support == uint8(VoteType.Against)) {
proposalVote.againstVotes += weight;
} else if (support == uint8(VoteType.For)) {
proposalVote.forVotes += weight;
} else if (support == uint8(VoteType.Abstain)) {
proposalVote.abstainVotes += weight;
} else {
revert('GovernorVotingSimple: invalid value for enum VoteType');
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import '@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
/**
* @dev This contract is based on OpenZeppelin's access/Ownable.sol contract.
* The only thing changed is the removal of `renounceOwnership()` function and name of the variables.
*/
abstract contract Magistrate is Initializable, ContextUpgradeable {
address private _magistrate;
event MagistrateChanged(
address indexed previousMagistrate,
address indexed newMagistrate
);
/**
* @dev Initializer to set the initial magistrate. Must be called during proxy initialization.
*/
function __Magistrate_init(address magistrate_) internal onlyInitializing {
__Context_init();
__Magistrate_init_unchained(magistrate_);
}
function __Magistrate_init_unchained(
address magistrate_
) internal onlyInitializing {
_transferMagistrate(magistrate_);
}
/**
* @dev Throws if called by any account other than the magistrate.
*/
modifier onlyMagistrate() {
_checkMagistrate();
_;
}
/**
* @dev Returns the address of the current magistrate.
*/
function magistrate() public view virtual returns (address) {
return _magistrate;
}
/**
* @dev Throws if the sender is not the magistrate.
*/
function _checkMagistrate() internal view virtual {
require(
magistrate() == _msgSender(),
'Magistrate: caller is not the magistrate'
);
}
/**
* @dev Transfers magistrate of the contract to a new account (`newMagistrate`).
* Can only be called by the current magistrate.
*/
function transferMagistrate(
address newMagistrate
) public virtual onlyMagistrate {
require(
newMagistrate != address(0),
'Magistrate: new magistrate is the zero address'
);
_transferMagistrate(newMagistrate);
}
/**
* @dev Transfers magistrate to a new account (`newMagistrate`).
* Internal function without access restriction.
*/
function _transferMagistrate(address newMagistrate) internal virtual {
address oldMagistrate = _magistrate;
_magistrate = newMagistrate;
emit MagistrateChanged(oldMagistrate, newMagistrate);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
import '@openzeppelin/contracts-upgradeable/governance/GovernorUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/governance/IGovernorUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/governance/extensions/GovernorSettingsUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/governance/extensions/GovernorVotesUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/governance/extensions/GovernorVotesQuorumFractionUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/governance/extensions/GovernorTimelockControlUpgradeable.sol';
import './CrossChainGovernorCountingSimple.sol';
import './wormhole/IWormholeRelayer.sol';
import './wormhole/IWormholeReceiver.sol';
import './magistrate/Magistrate.sol';
/**
* @title MetaHumanGovernor
* @dev MetaHumanGovernor is a contract that serves as a governance system for MetaHuman-related operations. It extends multiple contracts to incorporate various functionalities.
*
* This is the hub contract in the MetaHuman governance smart contracts infrastructure.
* It's based on OpenZeppelin's {Governor} implementation along with basic extensions.
* For more details check out [OpenZeppelin's documentation](https://docs.openzeppelin.com/contracts/4.x/api/governance#governor).
*/
contract MetaHumanGovernor is
GovernorUpgradeable,
GovernorSettingsUpgradeable,
CrossChainGovernorCountingSimple,
GovernorVotesUpgradeable,
GovernorVotesQuorumFractionUpgradeable,
GovernorTimelockControlUpgradeable,
Magistrate,
IWormholeReceiver
{
error MessageAlreadyProcessed();
error OnlyRelayerAllowed();
error InvalidIntendedRecipient();
error ProposalAlreadyInitialized();
error CollectionPhaseUnfinished();
error RequestAfterVotePeriodOver();
error CollectionPhaseAlreadyStarted();
error OnlyMessagesFromSpokeReceived();
error UseCrossChainCancel();
error UseCrossChainPropose();
error ProposalNotSuccessful();
error ZeroBalance();
IWormholeRelayer public wormholeRelayer;
uint256 internal constant GAS_LIMIT = 500_000;
uint256 public secondsPerBlock;
uint16 public chainId;
mapping(bytes32 => bool) public processedMessages;
mapping(uint256 => bool) public collectionStarted;
mapping(uint256 => bool) public collectionFinished;
uint256[50] private __gap;
/**
* @dev Contract constructor.
* @param _token The address of the token contract used for voting.
* @param _timelock The address of the timelock contract used for delayed execution.
* @param _spokeContracts An array of CrossChainAddress structs representing the spoke contracts.
* @param _chainId The chain ID of the current contract.
* @param _wormholeRelayerAddress The address of the wormhole automatic relayer contract used for cross-chain communication
*/
function initialize(
IVotesUpgradeable _token,
TimelockControllerUpgradeable _timelock,
CrossChainAddress[] memory _spokeContracts,
uint16 _chainId,
address _wormholeRelayerAddress,
address _magistrateAddress,
uint256 _secondsPerBlock,
uint48 _votingDelayInSeconds,
uint32 _votingPeriodInSeconds,
uint256 _proposalThreshold,
uint256 _quorumFraction
) public initializer {
__Governor_init('MetaHumanGovernor');
__GovernorSettings_init(
_votingDelayInSeconds,
_votingPeriodInSeconds,
_proposalThreshold
);
__CrossChainGovernorCountingSimple_init(_spokeContracts);
__GovernorVotes_init(_token);
__GovernorVotesQuorumFraction_init(_quorumFraction);
__GovernorTimelockControl_init(_timelock);
__Magistrate_init(_magistrateAddress);
chainId = _chainId;
wormholeRelayer = IWormholeRelayer(_wormholeRelayerAddress);
secondsPerBlock = _secondsPerBlock;
}
function cancel(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
)
public
override(GovernorUpgradeable, IGovernorUpgradeable)
returns (uint256)
{
uint256 proposalId = hashProposal(
targets,
values,
calldatas,
descriptionHash
);
if (spokeContractsSnapshots[proposalId].length > 0) {
revert UseCrossChainCancel();
}
return super.cancel(targets, values, calldatas, descriptionHash);
}
function crossChainCancel(
address[] calldata targets,
uint256[] calldata values,
bytes[] calldata calldatas,
bytes32 descriptionHash
) external payable returns (uint256) {
uint256 proposalId = super.cancel(
targets,
values,
calldatas,
descriptionHash
);
bytes memory message = abi.encode(uint16(2), proposalId); // selector 2 = cancel
_sendCrossChainMessageToSpokes(proposalId, message, address(this));
return proposalId;
}
/**
* @dev Receives messages from the Wormhole protocol's relay mechanism and processes them accordingly.
* This function is intended to be called only by the designated Wormhole relayer.
* @param payload The payload of the received message.
* @param sourceAddress The address that initiated the message transmission (HelloWormhole contract address).
* @param sourceChain The chain ID of the source contract.
* @param deliveryHash A unique hash representing the delivery of the message to prevent duplicate processing.
*/
function receiveWormholeMessages(
bytes calldata payload,
bytes[] calldata, // additionalVaas
bytes32 sourceAddress, // address that called 'sendPayloadToEvm' (HelloWormhole contract address)
uint16 sourceChain,
bytes32 deliveryHash // this can be stored in a mapping deliveryHash => bool to prevent duplicate deliveries
) public payable override {
if (msg.sender != address(wormholeRelayer)) {
revert OnlyRelayerAllowed();
}
if (processedMessages[deliveryHash]) {
revert MessageAlreadyProcessed();
}
(
address intendedRecipient, //chainId
,
,
bytes memory decodedMessage
) = abi.decode(payload, (address, uint16, address, bytes));
if (intendedRecipient != address(this)) {
revert InvalidIntendedRecipient();
}
processedMessages[deliveryHash] = true;
// Gets a function selector option
uint16 option;
assembly {
option := mload(add(decodedMessage, 32))
}
if (option == 0) {
onReceiveSpokeVotingData(
sourceChain,
sourceAddress,
decodedMessage
);
}
}
/**
* @dev Processes the received voting data from the spoke contracts.
* @param emitterChainId The chain ID of the emitter contract.
* @param emitterAddress The address of the emitter contract.
* @param payload The message payload.
*/
function onReceiveSpokeVotingData(
uint16 emitterChainId,
bytes32 emitterAddress,
bytes memory payload
) internal virtual {
(
,
// uint16 option
uint256 _proposalId,
uint256 _for,
uint256 _against,
uint256 _abstain
) = abi.decode(payload, (uint16, uint256, uint256, uint256, uint256));
if (
!spokeContractsMappingSnapshots[_proposalId][emitterAddress][
emitterChainId
]
) {
revert OnlyMessagesFromSpokeReceived();
}
// As long as the received data isn't already initialized...
if (
spokeVotes[_proposalId][emitterAddress][emitterChainId].initialized
) {
revert ProposalAlreadyInitialized();
} else {
// Add it to the map (while setting initialized true)
spokeVotes[_proposalId][emitterAddress][
emitterChainId
] = SpokeProposalVote(_for, _against, _abstain, true);
_finishCollectionPhase(_proposalId);
}
}
/**
* @dev Checks if the collection phase for a proposal has finished.
* @param proposalId The ID of the proposal.
*/
function _finishCollectionPhase(uint256 proposalId) internal {
bool phaseFinished = true;
uint256 spokeContractsLength = spokeContractsSnapshots[proposalId]
.length;
for (uint16 i = 0; i < spokeContractsLength && phaseFinished; ++i) {
phaseFinished =
phaseFinished &&
spokeVotes[proposalId][
spokeContractsSnapshots[proposalId][i].contractAddress
][spokeContractsSnapshots[proposalId][i].chainId].initialized;
}
collectionFinished[proposalId] = phaseFinished;
}
/**
* @dev Requests the voting data from all of the spoke chains.
* @param proposalId The ID of the proposal.
*/
function requestCollections(uint256 proposalId) external payable {
if (block.timestamp < proposalDeadline(proposalId)) {
revert RequestAfterVotePeriodOver();
}
if (collectionStarted[proposalId]) {
revert CollectionPhaseAlreadyStarted();
}
collectionStarted[proposalId] = true;
uint256 spokeContractsLength = spokeContractsSnapshots[proposalId]
.length;
// If there are no spoke contracts, finish the collection phase
if (spokeContractsLength == 0) {
_finishCollectionPhase(proposalId);
}
bytes memory message = abi.encode(uint16(1), proposalId); // selector 1 = requestCollections
_sendCrossChainMessageToSpokes(proposalId, message, msg.sender);
}
/**
* @dev Creates and publishes a proposal to the spoke contracts.
* This function can be executed only by the magistrate address
* @param targets The array of target addresses.
* @param values The array of values to be sent in the transactions.
* @param calldatas The array of calldata for the transactions.
* @param description The description of the proposal.
* @return The ID of the created proposal.
*/
function crossChainPropose(
address[] calldata targets,
uint256[] calldata values,
bytes[] calldata calldatas,
string calldata description
) external payable virtual onlyMagistrate returns (uint256) {
uint256 proposalId = super.propose(
targets,
values,
calldatas,
description
);
//create snapshot of current spokes
createSnapshot(proposalId);
uint256 voteStartTimestamp = proposalSnapshot(proposalId);
uint256 voteEndTimestamp = proposalDeadline(proposalId);
bytes memory message = abi.encode(
uint16(0), // selector 0 = propose
proposalId,
block.timestamp,
voteStartTimestamp,
voteEndTimestamp
);
_sendCrossChainMessageToSpokes(proposalId, message, address(this));
return proposalId;
}
/**
* @dev Internal function to send a cross-chain message to all spoke contracts for a given proposal.
* @param proposalId The ID of the proposal.
* @param message The encoded message to send.
* @param sender The address to set as msg.sender in the payload (for requestCollections, otherwise address(this)).
*/
function _sendCrossChainMessageToSpokes(
uint256 proposalId,
bytes memory message,
address sender
) internal {
uint256 spokeContractsLength = spokeContractsSnapshots[proposalId]
.length;
for (uint16 i = 0; i < spokeContractsLength; ++i) {
uint16 spokeChainId = spokeContractsSnapshots[proposalId][i]
.chainId;
address spokeAddress = address(
uint160(
uint256(
spokeContractsSnapshots[proposalId][i].contractAddress
)
)
);
bytes memory payload = abi.encode(
spokeAddress,
spokeChainId,
sender,
message
);
uint256 cost = _quoteCrossChainMessage(spokeChainId, 0);
wormholeRelayer.sendPayloadToEvm{value: cost}(
spokeChainId,
spokeAddress,
payload,
0,
GAS_LIMIT,
spokeChainId,
magistrate()
);
}
}
/**
* @dev Retrieves the quote for cross chain message delivery.
* @return cost Price, in units of current chain currency, that the delivery provider charges to perform the relay
*/
function _quoteCrossChainMessage(
uint16 targetChain,
uint256 valueToSend
) internal view returns (uint256 cost) {
(cost, ) = wormholeRelayer.quoteEVMDeliveryPrice(
targetChain,
valueToSend,
GAS_LIMIT
);
}
// The following functions are overrides required by Solidity.
/**
* @dev Retrieves the voting delay period.
* @return The duration of voting delay in seconds.
*/
function votingDelay()
public
view
override(IGovernorUpgradeable, GovernorSettingsUpgradeable)
returns (uint256)
{
return super.votingDelay(); // Ensure this returns time in seconds
}
/**
* @dev Retrieves the voting period duration.
* @return The duration of the voting period in seconds
*/
function votingPeriod()
public
view
override(IGovernorUpgradeable, GovernorSettingsUpgradeable)
returns (uint256)
{
return super.votingPeriod(); // Ensure this returns time in seconds
}
/**
* @dev Retrieves the quorum required for voting.
* @param snapshotTime The timestamp (snapshot) at which to calculate the quorum
* @return The required quorum percentage.
*/
function quorum(
uint256 snapshotTime
)
public
view
override(IGovernorUpgradeable, GovernorVotesQuorumFractionUpgradeable)
returns (uint256)
{
return super.quorum(snapshotTime);
}
/**
* @dev Retrieves the state of a proposal.
*
* @param proposalId The ID of the proposal.
* @return The current state of the proposal.
*/
function state(
uint256 proposalId
)
public
view
override(GovernorUpgradeable, GovernorTimelockControlUpgradeable)
returns (ProposalState)
{
return super.state(proposalId);
}
/**
* @dev This is mocked to just revert. Left for compatibility reasons. The only way to create a proposal is [crossChainPropose](#crosschainpropose)
*/
function propose(
address[] memory,
uint256[] memory,
bytes[] memory,
string memory
)
public
pure
override(GovernorUpgradeable, IGovernorUpgradeable)
returns (uint256)
{
revert UseCrossChainPropose();
}
/**
* @dev Retrieves the proposal threshold required for creating a proposal.
* @return The minimum number of votes required for a proposal to succeed.
*/
function proposalThreshold()
public
view
override(GovernorUpgradeable, GovernorSettingsUpgradeable)
returns (uint256)
{
return super.proposalThreshold();
}
/**
* @dev Cancels a proposal.
* @param targets The array of target addresses.
* @param values The array of values to be sent in the transactions.
* @param calldatas The array of calldata for the transactions.
* @param descriptionHash The hash of the proposal description.
* @return The ID of the canceled proposal.
*/
function _cancel(
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
)
internal
override(GovernorUpgradeable, GovernorTimelockControlUpgradeable)
returns (uint256)
{
return super._cancel(targets, values, calldatas, descriptionHash);
}
/**
* @dev Retrieves the executor address.
* @return The address of the executor.
*/
function _executor()
internal
view
override(GovernorUpgradeable, GovernorTimelockControlUpgradeable)
returns (address)
{
return super._executor();
}
function _execute(
uint256 proposalId,
address[] memory targets,
uint256[] memory values,
bytes[] memory calldatas,
bytes32 descriptionHash
)
internal
override(GovernorUpgradeable, GovernorTimelockControlUpgradeable)
{
_finishCollectionPhase(proposalId);
if (!collectionFinished[proposalId]) {
revert CollectionPhaseUnfinished();
}
super._execute(proposalId, targets, values, calldatas, descriptionHash);
}
/**
* @dev Checks if a contract supports a given interface.
* @param interfaceId The interface identifier.
* @return A boolean indicating whether the interface is supported.
*/
function supportsInterface(
bytes4 interfaceId
)
public
view
override(GovernorUpgradeable, GovernorTimelockControlUpgradeable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
/**
* @dev Withdraws the contract's balance to the magistrate address.
* Can only be called by the magistrate.
*/
function withdraw() external onlyMagistrate {
uint256 balance = address(this).balance;
if (balance == 0) {
revert ZeroBalance();
}
payable(msg.sender).transfer(balance);
}
receive() external payable override(GovernorUpgradeable) {}
}// SPDX-License-Identifier: Apache 2
pragma solidity ^0.8.0;
/**
* @notice Interface for a contract which can receive Wormhole messages.
*/
interface IWormholeReceiver {
/**
* @notice When a `send` is performed with this contract as the target, this function will be
* invoked by the WormholeRelayer contract
*
* NOTE: This function should be restricted such that only the Wormhole Relayer contract can call it.
*
* We also recommend that this function:
* - Stores all received `deliveryHash`s in a mapping `(bytes32 => bool)`, and
* on every call, checks that deliveryHash has not already been stored in the
* map (This is to prevent other users maliciously trying to relay the same message)
* - Checks that `sourceChain` and `sourceAddress` are indeed who
* you expect to have requested the calling of `send` or `forward` on the source chain
*
* The invocation of this function corresponding to the `send` request will have msg.value equal
* to the receiverValue specified in the send request.
*
* If the invocation of this function reverts or exceeds the gas limit
* specified by the send requester, this delivery will result in a `ReceiverFailure`.
*
* @param payload - an arbitrary message which was included in the delivery by the
* requester.
* @param additionalVaas - Additional VAAs which were requested to be included in this delivery.
* They are guaranteed to all be included and in the same order as was specified in the
* delivery request.
* @param sourceAddress - the (wormhole format) address on the sending chain which requested
* this delivery.
* @param sourceChain - the wormhole chain ID where this delivery was requested.
* @param deliveryHash - the VAA hash of the deliveryVAA.
*
* NOTE: These signedVaas are NOT verified by the Wormhole core contract prior to being provided
* to this call. Always make sure `parseAndVerify()` is called on the Wormhole core contract
* before trusting the content of a raw VAA, otherwise the VAA may be invalid or malicious.
*/
function receiveWormholeMessages(
bytes memory payload,
bytes[] memory additionalVaas,
bytes32 sourceAddress,
uint16 sourceChain,
bytes32 deliveryHash
) external payable;
}// SPDX-License-Identifier: Apache 2
pragma solidity ^0.8.0;
/**
* @title WormholeRelayer
* @author
* @notice This project allows developers to build cross-chain applications powered by Wormhole without needing to
* write and run their own relaying infrastructure
*
* We implement the IWormholeRelayer interface that allows users to request a delivery provider to relay a payload (and/or additional VAAs)
* to a chain and address of their choice.
*/
/**
* @notice VaaKey identifies a wormhole message
*
* @custom:member chainId Wormhole chain ID of the chain where this VAA was emitted from
* @custom:member emitterAddress Address of the emitter of the VAA, in Wormhole bytes32 format
* @custom:member sequence Sequence number of the VAA
*/
struct VaaKey {
uint16 chainId;
bytes32 emitterAddress;
uint64 sequence;
}
interface IWormholeRelayerBase {
event SendEvent(
uint64 indexed sequence,
uint256 deliveryQuote,
uint256 paymentForExtraReceiverValue
);
function getRegisteredWormholeRelayerContract(
uint16 chainId
) external view returns (bytes32);
}
/**
* @title IWormholeRelayerSend
* @notice The interface to request deliveries
*/
interface IWormholeRelayerSend is IWormholeRelayerBase {
/**
* @notice Publishes an instruction for the default delivery provider
* to relay a payload to the address `targetAddress` on chain `targetChain`
* with gas limit `gasLimit` and `msg.value` equal to `receiverValue`
*
* `targetAddress` must implement the IWormholeReceiver interface
*
* This function must be called with `msg.value` equal to `quoteEVMDeliveryPrice(targetChain, receiverValue, gasLimit)`
*
* Any refunds (from leftover gas) will be paid to the delivery provider. In order to receive the refunds, use the `sendPayloadToEvm` function
* with `refundChain` and `refundAddress` as parameters
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver)
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param gasLimit gas limit with which to call `targetAddress`.
* @return sequence sequence number of published VAA containing delivery instructions
*/
function sendPayloadToEvm(
uint16 targetChain,
address targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 gasLimit
) external payable returns (uint64 sequence);
/**
* @notice Publishes an instruction for the default delivery provider
* to relay a payload to the address `targetAddress` on chain `targetChain`
* with gas limit `gasLimit` and `msg.value` equal to `receiverValue`
*
* Any refunds (from leftover gas) will be sent to `refundAddress` on chain `refundChain`
* `targetAddress` must implement the IWormholeReceiver interface
*
* This function must be called with `msg.value` equal to `quoteEVMDeliveryPrice(targetChain, receiverValue, gasLimit)`
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver)
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param gasLimit gas limit with which to call `targetAddress`. Any units of gas unused will be refunded according to the
* `targetChainRefundPerGasUnused` rate quoted by the delivery provider
* @param refundChain The chain to deliver any refund to, in Wormhole Chain ID format
* @param refundAddress The address on `refundChain` to deliver any refund to
* @return sequence sequence number of published VAA containing delivery instructions
*/
function sendPayloadToEvm(
uint16 targetChain,
address targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 gasLimit,
uint16 refundChain,
address refundAddress
) external payable returns (uint64 sequence);
/**
* @notice Publishes an instruction for the default delivery provider
* to relay a payload and VAAs specified by `vaaKeys` to the address `targetAddress` on chain `targetChain`
* with gas limit `gasLimit` and `msg.value` equal to `receiverValue`
*
* `targetAddress` must implement the IWormholeReceiver interface
*
* This function must be called with `msg.value` equal to `quoteEVMDeliveryPrice(targetChain, receiverValue, gasLimit)`
*
* Any refunds (from leftover gas) will be paid to the delivery provider. In order to receive the refunds, use the `sendVaasToEvm` function
* with `refundChain` and `refundAddress` as parameters
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver)
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param gasLimit gas limit with which to call `targetAddress`.
* @param vaaKeys Additional VAAs to pass in as parameter in call to `targetAddress`
* @return sequence sequence number of published VAA containing delivery instructions
*/
function sendVaasToEvm(
uint16 targetChain,
address targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 gasLimit,
VaaKey[] memory vaaKeys
) external payable returns (uint64 sequence);
/**
* @notice Publishes an instruction for the default delivery provider
* to relay a payload and VAAs specified by `vaaKeys` to the address `targetAddress` on chain `targetChain`
* with gas limit `gasLimit` and `msg.value` equal to `receiverValue`
*
* Any refunds (from leftover gas) will be sent to `refundAddress` on chain `refundChain`
* `targetAddress` must implement the IWormholeReceiver interface
*
* This function must be called with `msg.value` equal to `quoteEVMDeliveryPrice(targetChain, receiverValue, gasLimit)`
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver)
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param gasLimit gas limit with which to call `targetAddress`. Any units of gas unused will be refunded according to the
* `targetChainRefundPerGasUnused` rate quoted by the delivery provider
* @param vaaKeys Additional VAAs to pass in as parameter in call to `targetAddress`
* @param refundChain The chain to deliver any refund to, in Wormhole Chain ID format
* @param refundAddress The address on `refundChain` to deliver any refund to
* @return sequence sequence number of published VAA containing delivery instructions
*/
function sendVaasToEvm(
uint16 targetChain,
address targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 gasLimit,
VaaKey[] memory vaaKeys,
uint16 refundChain,
address refundAddress
) external payable returns (uint64 sequence);
/**
* @notice Publishes an instruction for the delivery provider at `deliveryProviderAddress`
* to relay a payload and VAAs specified by `vaaKeys` to the address `targetAddress` on chain `targetChain`
* with gas limit `gasLimit` and `msg.value` equal to
* receiverValue + (arbitrary amount that is paid for by paymentForExtraReceiverValue of this chain's wei) in targetChain wei.
*
* Any refunds (from leftover gas) will be sent to `refundAddress` on chain `refundChain`
* `targetAddress` must implement the IWormholeReceiver interface
*
* This function must be called with `msg.value` equal to
* quoteEVMDeliveryPrice(targetChain, receiverValue, gasLimit, deliveryProviderAddress) + paymentForExtraReceiverValue
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver)
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param paymentForExtraReceiverValue amount (in current chain currency units) to spend on extra receiverValue
* (in addition to the `receiverValue` specified)
* @param gasLimit gas limit with which to call `targetAddress`. Any units of gas unused will be refunded according to the
* `targetChainRefundPerGasUnused` rate quoted by the delivery provider
* @param refundChain The chain to deliver any refund to, in Wormhole Chain ID format
* @param refundAddress The address on `refundChain` to deliver any refund to
* @param deliveryProviderAddress The address of the desired delivery provider's implementation of IDeliveryProvider
* @param vaaKeys Additional VAAs to pass in as parameter in call to `targetAddress`
* @param consistencyLevel Consistency level with which to publish the delivery instructions - see
* https://book.wormhole.com/wormhole/3_coreLayerContracts.html?highlight=consistency#consistency-levels
* @return sequence sequence number of published VAA containing delivery instructions
*/
function sendToEvm(
uint16 targetChain,
address targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 paymentForExtraReceiverValue,
uint256 gasLimit,
uint16 refundChain,
address refundAddress,
address deliveryProviderAddress,
VaaKey[] memory vaaKeys,
uint8 consistencyLevel
) external payable returns (uint64 sequence);
/**
* @notice Publishes an instruction for the delivery provider at `deliveryProviderAddress`
* to relay a payload and VAAs specified by `vaaKeys` to the address `targetAddress` on chain `targetChain`
* with `msg.value` equal to
* receiverValue + (arbitrary amount that is paid for by paymentForExtraReceiverValue of this chain's wei) in targetChain wei.
*
* Any refunds (from leftover gas) will be sent to `refundAddress` on chain `refundChain`
* `targetAddress` must implement the IWormholeReceiver interface
*
* This function must be called with `msg.value` equal to
* quoteDeliveryPrice(targetChain, receiverValue, encodedExecutionParameters, deliveryProviderAddress) + paymentForExtraReceiverValue
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver), in Wormhole bytes32 format
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param paymentForExtraReceiverValue amount (in current chain currency units) to spend on extra receiverValue
* (in addition to the `receiverValue` specified)
* @param encodedExecutionParameters encoded information on how to execute delivery that may impact pricing
* e.g. for version EVM_V1, this is a struct that encodes the `gasLimit` with which to call `targetAddress`
* @param refundChain The chain to deliver any refund to, in Wormhole Chain ID format
* @param refundAddress The address on `refundChain` to deliver any refund to, in Wormhole bytes32 format
* @param deliveryProviderAddress The address of the desired delivery provider's implementation of IDeliveryProvider
* @param vaaKeys Additional VAAs to pass in as parameter in call to `targetAddress`
* @param consistencyLevel Consistency level with which to publish the delivery instructions - see
* https://book.wormhole.com/wormhole/3_coreLayerContracts.html?highlight=consistency#consistency-levels
* @return sequence sequence number of published VAA containing delivery instructions
*/
function send(
uint16 targetChain,
bytes32 targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 paymentForExtraReceiverValue,
bytes memory encodedExecutionParameters,
uint16 refundChain,
bytes32 refundAddress,
address deliveryProviderAddress,
VaaKey[] memory vaaKeys,
uint8 consistencyLevel
) external payable returns (uint64 sequence);
/**
* @notice Performs the same function as a `send`, except:
* 1) Can only be used during a delivery (i.e. in execution of `receiveWormholeMessages`)
* 2) Is paid for (along with any other calls to forward) by (any msg.value passed in) + (refund leftover from current delivery)
* 3) Only executes after `receiveWormholeMessages` is completed (and thus does not return a sequence number)
*
* The refund from the delivery currently in progress will not be sent to the user; it will instead
* be paid to the delivery provider to perform the instruction specified here
*
* Publishes an instruction for the same delivery provider (or default, if the same one doesn't support the new target chain)
* to relay a payload to the address `targetAddress` on chain `targetChain`
* with gas limit `gasLimit` and with `msg.value` equal to `receiverValue`
*
* The following equation must be satisfied (sum_f indicates summing over all forwards requested in `receiveWormholeMessages`):
* (refund amount from current execution of receiveWormholeMessages) + sum_f [msg.value_f]
* >= sum_f [quoteEVMDeliveryPrice(targetChain_f, receiverValue_f, gasLimit_f)]
*
* The difference between the two sides of the above inequality will be added to `paymentForExtraReceiverValue` of the first forward requested
*
* Any refunds (from leftover gas) from this forward will be paid to the same refundChain and refundAddress specified for the current delivery.
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver), in Wormhole bytes32 format
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param gasLimit gas limit with which to call `targetAddress`.
*/
function forwardPayloadToEvm(
uint16 targetChain,
address targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 gasLimit
) external payable;
/**
* @notice Performs the same function as a `send`, except:
* 1) Can only be used during a delivery (i.e. in execution of `receiveWormholeMessages`)
* 2) Is paid for (along with any other calls to forward) by (any msg.value passed in) + (refund leftover from current delivery)
* 3) Only executes after `receiveWormholeMessages` is completed (and thus does not return a sequence number)
*
* The refund from the delivery currently in progress will not be sent to the user; it will instead
* be paid to the delivery provider to perform the instruction specified here
*
* Publishes an instruction for the same delivery provider (or default, if the same one doesn't support the new target chain)
* to relay a payload and VAAs specified by `vaaKeys` to the address `targetAddress` on chain `targetChain`
* with gas limit `gasLimit` and with `msg.value` equal to `receiverValue`
*
* The following equation must be satisfied (sum_f indicates summing over all forwards requested in `receiveWormholeMessages`):
* (refund amount from current execution of receiveWormholeMessages) + sum_f [msg.value_f]
* >= sum_f [quoteEVMDeliveryPrice(targetChain_f, receiverValue_f, gasLimit_f)]
*
* The difference between the two sides of the above inequality will be added to `paymentForExtraReceiverValue` of the first forward requested
*
* Any refunds (from leftover gas) from this forward will be paid to the same refundChain and refundAddress specified for the current delivery.
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver), in Wormhole bytes32 format
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param gasLimit gas limit with which to call `targetAddress`.
* @param vaaKeys Additional VAAs to pass in as parameter in call to `targetAddress`
*/
function forwardVaasToEvm(
uint16 targetChain,
address targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 gasLimit,
VaaKey[] memory vaaKeys
) external payable;
/**
* @notice Performs the same function as a `send`, except:
* 1) Can only be used during a delivery (i.e. in execution of `receiveWormholeMessages`)
* 2) Is paid for (along with any other calls to forward) by (any msg.value passed in) + (refund leftover from current delivery)
* 3) Only executes after `receiveWormholeMessages` is completed (and thus does not return a sequence number)
*
* The refund from the delivery currently in progress will not be sent to the user; it will instead
* be paid to the delivery provider to perform the instruction specified here
*
* Publishes an instruction for the delivery provider at `deliveryProviderAddress`
* to relay a payload and VAAs specified by `vaaKeys` to the address `targetAddress` on chain `targetChain`
* with gas limit `gasLimit` and with `msg.value` equal to
* receiverValue + (arbitrary amount that is paid for by paymentForExtraReceiverValue of this chain's wei) in targetChain wei.
*
* Any refunds (from leftover gas) will be sent to `refundAddress` on chain `refundChain`
* `targetAddress` must implement the IWormholeReceiver interface
*
* The following equation must be satisfied (sum_f indicates summing over all forwards requested in `receiveWormholeMessages`):
* (refund amount from current execution of receiveWormholeMessages) + sum_f [msg.value_f]
* >= sum_f [quoteEVMDeliveryPrice(targetChain_f, receiverValue_f, gasLimit_f, deliveryProviderAddress_f) + paymentForExtraReceiverValue_f]
*
* The difference between the two sides of the above inequality will be added to `paymentForExtraReceiverValue` of the first forward requested
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver), in Wormhole bytes32 format
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param paymentForExtraReceiverValue amount (in current chain currency units) to spend on extra receiverValue
* (in addition to the `receiverValue` specified)
* @param gasLimit gas limit with which to call `targetAddress`. Any units of gas unused will be refunded according to the
* `targetChainRefundPerGasUnused` rate quoted by the delivery provider
* @param refundChain The chain to deliver any refund to, in Wormhole Chain ID format
* @param refundAddress The address on `refundChain` to deliver any refund to, in Wormhole bytes32 format
* @param deliveryProviderAddress The address of the desired delivery provider's implementation of IDeliveryProvider
* @param vaaKeys Additional VAAs to pass in as parameter in call to `targetAddress`
* @param consistencyLevel Consistency level with which to publish the delivery instructions - see
* https://book.wormhole.com/wormhole/3_coreLayerContracts.html?highlight=consistency#consistency-levels
*/
function forwardToEvm(
uint16 targetChain,
address targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 paymentForExtraReceiverValue,
uint256 gasLimit,
uint16 refundChain,
address refundAddress,
address deliveryProviderAddress,
VaaKey[] memory vaaKeys,
uint8 consistencyLevel
) external payable;
/**
* @notice Performs the same function as a `send`, except:
* 1) Can only be used during a delivery (i.e. in execution of `receiveWormholeMessages`)
* 2) Is paid for (along with any other calls to forward) by (any msg.value passed in) + (refund leftover from current delivery)
* 3) Only executes after `receiveWormholeMessages` is completed (and thus does not return a sequence number)
*
* The refund from the delivery currently in progress will not be sent to the user; it will instead
* be paid to the delivery provider to perform the instruction specified here
*
* Publishes an instruction for the delivery provider at `deliveryProviderAddress`
* to relay a payload and VAAs specified by `vaaKeys` to the address `targetAddress` on chain `targetChain`
* with `msg.value` equal to
* receiverValue + (arbitrary amount that is paid for by paymentForExtraReceiverValue of this chain's wei) in targetChain wei.
*
* Any refunds (from leftover gas) will be sent to `refundAddress` on chain `refundChain`
* `targetAddress` must implement the IWormholeReceiver interface
*
* The following equation must be satisfied (sum_f indicates summing over all forwards requested in `receiveWormholeMessages`):
* (refund amount from current execution of receiveWormholeMessages) + sum_f [msg.value_f]
* >= sum_f [quoteDeliveryPrice(targetChain_f, receiverValue_f, encodedExecutionParameters_f, deliveryProviderAddress_f) + paymentForExtraReceiverValue_f]
*
* The difference between the two sides of the above inequality will be added to `paymentForExtraReceiverValue` of the first forward requested
*
* @param targetChain in Wormhole Chain ID format
* @param targetAddress address to call on targetChain (that implements IWormholeReceiver), in Wormhole bytes32 format
* @param payload arbitrary bytes to pass in as parameter in call to `targetAddress`
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param paymentForExtraReceiverValue amount (in current chain currency units) to spend on extra receiverValue
* (in addition to the `receiverValue` specified)
* @param encodedExecutionParameters encoded information on how to execute delivery that may impact pricing
* e.g. for version EVM_V1, this is a struct that encodes the `gasLimit` with which to call `targetAddress`
* @param refundChain The chain to deliver any refund to, in Wormhole Chain ID format
* @param refundAddress The address on `refundChain` to deliver any refund to, in Wormhole bytes32 format
* @param deliveryProviderAddress The address of the desired delivery provider's implementation of IDeliveryProvider
* @param vaaKeys Additional VAAs to pass in as parameter in call to `targetAddress`
* @param consistencyLevel Consistency level with which to publish the delivery instructions - see
* https://book.wormhole.com/wormhole/3_coreLayerContracts.html?highlight=consistency#consistency-levels
*/
function forward(
uint16 targetChain,
bytes32 targetAddress,
bytes memory payload,
uint256 receiverValue,
uint256 paymentForExtraReceiverValue,
bytes memory encodedExecutionParameters,
uint16 refundChain,
bytes32 refundAddress,
address deliveryProviderAddress,
VaaKey[] memory vaaKeys,
uint8 consistencyLevel
) external payable;
/**
* @notice Requests a previously published delivery instruction to be redelivered
* (e.g. with a different delivery provider)
*
* This function must be called with `msg.value` equal to
* quoteEVMDeliveryPrice(targetChain, newReceiverValue, newGasLimit, newDeliveryProviderAddress)
*
* @notice *** This will only be able to succeed if the following is true **
* - newGasLimit >= gas limit of the old instruction
* - newReceiverValue >= receiver value of the old instruction
* - newDeliveryProvider's `targetChainRefundPerGasUnused` >= old relay provider's `targetChainRefundPerGasUnused`
*
* @param deliveryVaaKey VaaKey identifying the wormhole message containing the
* previously published delivery instructions
* @param targetChain The target chain that the original delivery targeted. Must match targetChain from original delivery instructions
* @param newReceiverValue new msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param newGasLimit gas limit with which to call `targetAddress`. Any units of gas unused will be refunded according to the
* `targetChainRefundPerGasUnused` rate quoted by the delivery provider, to the refund chain and address specified in the original request
* @param newDeliveryProviderAddress The address of the desired delivery provider's implementation of IDeliveryProvider
* @return sequence sequence number of published VAA containing redelivery instructions
*
* @notice *** This will only be able to succeed if the following is true **
* - newGasLimit >= gas limit of the old instruction
* - newReceiverValue >= receiver value of the old instruction
* - newDeliveryProvider's `targetChainRefundPerGasUnused` >= old relay provider's `targetChainRefundPerGasUnused`
*/
function resendToEvm(
VaaKey memory deliveryVaaKey,
uint16 targetChain,
uint256 newReceiverValue,
uint256 newGasLimit,
address newDeliveryProviderAddress
) external payable returns (uint64 sequence);
/**
* @notice Requests a previously published delivery instruction to be redelivered
*
*
* This function must be called with `msg.value` equal to
* quoteDeliveryPrice(targetChain, newReceiverValue, newEncodedExecutionParameters, newDeliveryProviderAddress)
*
* @param deliveryVaaKey VaaKey identifying the wormhole message containing the
* previously published delivery instructions
* @param targetChain The target chain that the original delivery targeted. Must match targetChain from original delivery instructions
* @param newReceiverValue new msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param newEncodedExecutionParameters new encoded information on how to execute delivery that may impact pricing
* e.g. for version EVM_V1, this is a struct that encodes the `gasLimit` with which to call `targetAddress`
* @param newDeliveryProviderAddress The address of the desired delivery provider's implementation of IDeliveryProvider
* @return sequence sequence number of published VAA containing redelivery instructions
*
* @notice *** This will only be able to succeed if the following is true **
* - (For EVM_V1) newGasLimit >= gas limit of the old instruction
* - newReceiverValue >= receiver value of the old instruction
* - (For EVM_V1) newDeliveryProvider's `targetChainRefundPerGasUnused` >= old relay provider's `targetChainRefundPerGasUnused`
*/
function resend(
VaaKey memory deliveryVaaKey,
uint16 targetChain,
uint256 newReceiverValue,
bytes memory newEncodedExecutionParameters,
address newDeliveryProviderAddress
) external payable returns (uint64 sequence);
/**
* @notice Returns the price to request a relay to chain `targetChain`, using the default delivery provider
*
* @param targetChain in Wormhole Chain ID format
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param gasLimit gas limit with which to call `targetAddress`.
* @return nativePriceQuote Price, in units of current chain currency, that the delivery provider charges to perform the relay
* @return targetChainRefundPerGasUnused amount of target chain currency that will be refunded per unit of gas unused,
* if a refundAddress is specified
*/
function quoteEVMDeliveryPrice(
uint16 targetChain,
uint256 receiverValue,
uint256 gasLimit
)
external
view
returns (
uint256 nativePriceQuote,
uint256 targetChainRefundPerGasUnused
);
/**
* @notice Returns the price to request a relay to chain `targetChain`, using delivery provider `deliveryProviderAddress`
*
* @param targetChain in Wormhole Chain ID format
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param gasLimit gas limit with which to call `targetAddress`.
* @param deliveryProviderAddress The address of the desired delivery provider's implementation of IDeliveryProvider
* @return nativePriceQuote Price, in units of current chain currency, that the delivery provider charges to perform the relay
* @return targetChainRefundPerGasUnused amount of target chain currency that will be refunded per unit of gas unused,
* if a refundAddress is specified
*/
function quoteEVMDeliveryPrice(
uint16 targetChain,
uint256 receiverValue,
uint256 gasLimit,
address deliveryProviderAddress
)
external
view
returns (
uint256 nativePriceQuote,
uint256 targetChainRefundPerGasUnused
);
/**
* @notice Returns the price to request a relay to chain `targetChain`, using delivery provider `deliveryProviderAddress`
*
* @param targetChain in Wormhole Chain ID format
* @param receiverValue msg.value that delivery provider should pass in for call to `targetAddress` (in targetChain currency units)
* @param encodedExecutionParameters encoded information on how to execute delivery that may impact pricing
* e.g. for version EVM_V1, this is a struct that encodes the `gasLimit` with which to call `targetAddress`
* @param deliveryProviderAddress The address of the desired delivery provider's implementation of IDeliveryProvider
* @return nativePriceQuote Price, in units of current chain currency, that the delivery provider charges to perform the relay
* @return encodedExecutionInfo encoded information on how the delivery will be executed
* e.g. for version EVM_V1, this is a struct that encodes the `gasLimit` and `targetChainRefundPerGasUnused`
* (which is the amount of target chain currency that will be refunded per unit of gas unused,
* if a refundAddress is specified)
*/
function quoteDeliveryPrice(
uint16 targetChain,
uint256 receiverValue,
bytes memory encodedExecutionParameters,
address deliveryProviderAddress
)
external
view
returns (uint256 nativePriceQuote, bytes memory encodedExecutionInfo);
/**
* @notice Returns the (extra) amount of target chain currency that `targetAddress`
* will be called with, if the `paymentForExtraReceiverValue` field is set to `currentChainAmount`
*
* @param targetChain in Wormhole Chain ID format
* @param currentChainAmount The value that `paymentForExtraReceiverValue` will be set to
* @param deliveryProviderAddress The address of the desired delivery provider's implementation of IDeliveryProvider
* @return targetChainAmount The amount such that if `targetAddress` will be called with `msg.value` equal to
* receiverValue + targetChainAmount
*/
function quoteNativeForChain(
uint16 targetChain,
uint256 currentChainAmount,
address deliveryProviderAddress
) external view returns (uint256 targetChainAmount);
/**
* @notice Returns the address of the current default delivery provider
* @return deliveryProvider The address of (the default delivery provider)'s contract on this source
* chain. This must be a contract that implements IDeliveryProvider.
*/
function getDefaultDeliveryProvider()
external
view
returns (address deliveryProvider);
}
/**
* @title IWormholeRelayerDelivery
* @notice The interface to execute deliveries. Only relevant for Delivery Providers
*/
interface IWormholeRelayerDelivery is IWormholeRelayerBase {
enum DeliveryStatus {
SUCCESS,
RECEIVER_FAILURE,
FORWARD_REQUEST_FAILURE,
FORWARD_REQUEST_SUCCESS
}
enum RefundStatus {
REFUND_SENT,
REFUND_FAIL,
CROSS_CHAIN_REFUND_SENT,
CROSS_CHAIN_REFUND_FAIL_PROVIDER_NOT_SUPPORTED,
CROSS_CHAIN_REFUND_FAIL_NOT_ENOUGH
}
/**
* @custom:member recipientContract - The target contract address
* @custom:member sourceChain - The chain which this delivery was requested from (in wormhole
* ChainID format)
* @custom:member sequence - The wormhole sequence number of the delivery VAA on the source chain
* corresponding to this delivery request
* @custom:member deliveryVaaHash - The hash of the delivery VAA corresponding to this delivery
* request
* @custom:member gasUsed - The amount of gas that was used to call your target contract
* @custom:member status:
* - RECEIVER_FAILURE, if the target contract reverts
* - SUCCESS, if the target contract doesn't revert and no forwards were requested
* - FORWARD_REQUEST_FAILURE, if the target contract doesn't revert, forwards were requested,
* but provided/leftover funds were not sufficient to cover them all
* - FORWARD_REQUEST_SUCCESS, if the target contract doesn't revert and all forwards are covered
* @custom:member additionalStatusInfo:
* - If status is SUCCESS or FORWARD_REQUEST_SUCCESS, then this is empty.
* - If status is RECEIVER_FAILURE, this is `RETURNDATA_TRUNCATION_THRESHOLD` bytes of the
* return data (i.e. potentially truncated revert reason information).
* - If status is FORWARD_REQUEST_FAILURE, this is also the revert data - the reason the forward failed.
* This will be either an encoded Cancelled, DeliveryProviderReverted, or DeliveryProviderPaymentFailed error
* @custom:member refundStatus - Result of the refund. REFUND_SUCCESS or REFUND_FAIL are for
* refunds where targetChain=refundChain; the others are for targetChain!=refundChain,
* where a cross chain refund is necessary
* @custom:member overridesInfo:
* - If not an override: empty bytes array
* - Otherwise: An encoded `DeliveryOverride`
*/
event Delivery(
address indexed recipientContract,
uint16 indexed sourceChain,
uint64 indexed sequence,
bytes32 deliveryVaaHash,
DeliveryStatus status,
uint256 gasUsed,
RefundStatus refundStatus,
bytes additionalStatusInfo,
bytes overridesInfo
);
/**
* @notice The delivery provider calls `deliver` to relay messages as described by one delivery instruction
*
* The delivery provider must pass in the specified (by VaaKeys[]) signed wormhole messages (VAAs) from the source chain
* as well as the signed wormhole message with the delivery instructions (the delivery VAA)
*
* The messages will be relayed to the target address (with the specified gas limit and receiver value) iff the following checks are met:
* - the delivery VAA has a valid signature
* - the delivery VAA's emitter is one of these WormholeRelayer contracts
* - the delivery provider passed in at least enough of this chain's currency as msg.value (enough meaning the maximum possible refund)
* - the instruction's target chain is this chain
* - the relayed signed VAAs match the descriptions in container.messages (the VAA hashes match, or the emitter address, sequence number pair matches, depending on the description given)
*
* @param encodedVMs - An array of signed wormhole messages (all from the same source chain
* transaction)
* @param encodedDeliveryVAA - Signed wormhole message from the source chain's WormholeRelayer
* contract with payload being the encoded delivery instruction container
* @param relayerRefundAddress - The address to which any refunds to the delivery provider
* should be sent
* @param deliveryOverrides - Optional overrides field which must be either an empty bytes array or
* an encoded DeliveryOverride struct
*/
function deliver(
bytes[] memory encodedVMs,
bytes memory encodedDeliveryVAA,
address payable relayerRefundAddress,
bytes memory deliveryOverrides
) external payable;
}
interface IWormholeRelayer is IWormholeRelayerDelivery, IWormholeRelayerSend {}
/*
* Errors thrown by IWormholeRelayer contract
*/
// Bound chosen by the following formula: `memoryWord * 4 + selectorSize`.
// This means that an error identifier plus four fixed size arguments should be available to developers.
// In the case of a `require` revert with error message, this should provide 2 memory word's worth of data.
uint256 constant RETURNDATA_TRUNCATION_THRESHOLD = 132;
//When msg.value was not equal to `delivery provider's quoted delivery price` + `paymentForExtraReceiverValue`
error InvalidMsgValue(uint256 msgValue, uint256 totalFee);
error RequestedGasLimitTooLow();
error DeliveryProviderDoesNotSupportTargetChain(
address relayer,
uint16 chainId
);
error DeliveryProviderCannotReceivePayment();
//When calling `forward()` on the WormholeRelayer if no delivery is in progress
error NoDeliveryInProgress();
//When calling `delivery()` a second time even though a delivery is already in progress
error ReentrantDelivery(address msgSender, address lockedBy);
//When any other contract but the delivery target calls `forward()` on the WormholeRelayer while a
// delivery is in progress
error ForwardRequestFromWrongAddress(address msgSender, address deliveryTarget);
error InvalidPayloadId(uint8 parsed, uint8 expected);
error InvalidPayloadLength(uint256 received, uint256 expected);
error InvalidVaaKeyType(uint8 parsed);
error InvalidDeliveryVaa(string reason);
//When the delivery VAA (signed wormhole message with delivery instructions) was not emitted by the
// registered WormholeRelayer contract
error InvalidEmitter(bytes32 emitter, bytes32 registered, uint16 chainId);
error VaaKeysLengthDoesNotMatchVaasLength(uint256 keys, uint256 vaas);
error VaaKeysDoNotMatchVaas(uint8 index);
//When someone tries to call an external function of the WormholeRelayer that is only intended to be
// called by the WormholeRelayer itself (to allow retroactive reverts for atomicity)
error RequesterNotWormholeRelayer();
//When trying to relay a `DeliveryInstruction` to any other chain but the one it was specified for
error TargetChainIsNotThisChain(uint16 targetChain);
error ForwardNotSufficientlyFunded(
uint256 amountOfFunds,
uint256 amountOfFundsNeeded
);
//When a `DeliveryOverride` contains a gas limit that's less than the original
error InvalidOverrideGasLimit();
//When a `DeliveryOverride` contains a receiver value that's less than the original
error InvalidOverrideReceiverValue();
//When a `DeliveryOverride` contains a 'refund per unit of gas unused' that's less than the original
error InvalidOverrideRefundPerGasUnused();
//When the delivery provider doesn't pass in sufficient funds (i.e. msg.value does not cover the
// maximum possible refund to the user)
error InsufficientRelayerFunds(uint256 msgValue, uint256 minimum);
//When a bytes32 field can't be converted into a 20 byte EVM address, because the 12 padding bytes
// are non-zero (duplicated from Utils.sol)
error NotAnEvmAddress(bytes32);{
"viaIR": true,
"optimizer": {
"enabled": true,
"runs": 1
},
"metadata": {
"bytecodeHash": "none"
},
"evmVersion": "paris",
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[{"internalType":"bytes32","name":"_hubContractAddress","type":"bytes32"},{"internalType":"uint16","name":"_hubContractChainId","type":"uint16"},{"internalType":"contract IVotes","name":"_token","type":"address"},{"internalType":"uint256","name":"_targetSecondsPerBlock","type":"uint256"},{"internalType":"uint16","name":"_chainId","type":"uint16"},{"internalType":"address","name":"_wormholeRelayerAddress","type":"address"},{"internalType":"address","name":"_magistrateAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"AddressInsufficientBalance","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"inputs":[],"name":"InvalidIntendedRecipient","type":"error"},{"inputs":[{"internalType":"uint8","name":"support","type":"uint8"}],"name":"InvalidVoteType","type":"error"},{"inputs":[],"name":"MessageAlreadyProcessed","type":"error"},{"inputs":[],"name":"NotStartedVote","type":"error"},{"inputs":[],"name":"OnlyMessagesFromHub","type":"error"},{"inputs":[],"name":"OnlyRelayerAllowed","type":"error"},{"inputs":[],"name":"ProposalIdMustBeUnique","type":"error"},{"inputs":[],"name":"RelaySendFailed","type":"error"},{"inputs":[],"name":"VoteAlreadyCast","type":"error"},{"inputs":[],"name":"VoteFinished","type":"error"},{"inputs":[],"name":"VoteNotActive","type":"error"},{"inputs":[],"name":"VoteNotFinished","type":"error"},{"inputs":[],"name":"ZeroBalance","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousMagistrate","type":"address"},{"indexed":true,"internalType":"address","name":"newMagistrate","type":"address"}],"name":"MagistrateChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"voter","type":"address"},{"indexed":false,"internalType":"uint256","name":"proposalId","type":"uint256"},{"indexed":false,"internalType":"uint8","name":"support","type":"uint8"},{"indexed":false,"internalType":"uint256","name":"weight","type":"uint256"},{"indexed":false,"internalType":"string","name":"reason","type":"string"}],"name":"VoteCast","type":"event"},{"inputs":[{"internalType":"uint256","name":"proposalId","type":"uint256"},{"internalType":"uint8","name":"support","type":"uint8"}],"name":"castVote","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"chainId","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"proposalId","type":"uint256"},{"internalType":"address","name":"account","type":"address"}],"name":"hasVoted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"hubContractAddress","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"hubContractChainId","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"proposalId","type":"uint256"}],"name":"isProposal","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"magistrate","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"processedMessages","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"proposalVotes","outputs":[{"internalType":"uint256","name":"againstVotes","type":"uint256"},{"internalType":"uint256","name":"forVotes","type":"uint256"},{"internalType":"uint256","name":"abstainVotes","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"proposals","outputs":[{"internalType":"uint256","name":"proposalCreation","type":"uint256"},{"internalType":"uint256","name":"localVoteStart","type":"uint256"},{"internalType":"uint256","name":"localVoteEnd","type":"uint256"},{"internalType":"uint256","name":"localVoteStartBlock","type":"uint256"},{"internalType":"bool","name":"voteFinished","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"payload","type":"bytes"},{"internalType":"bytes[]","name":"","type":"bytes[]"},{"internalType":"bytes32","name":"sourceAddress","type":"bytes32"},{"internalType":"uint16","name":"sourceChain","type":"uint16"},{"internalType":"bytes32","name":"deliveryHash","type":"bytes32"}],"name":"receiveWormholeMessages","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"proposalId","type":"uint256"}],"name":"sendVoteResultToHub","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"targetSecondsPerBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"contract IVotes","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newMagistrate","type":"address"}],"name":"transferMagistrate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wormholeRelayer","outputs":[{"internalType":"contract IWormholeRelayer","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000098ca1cbcf337e500c7557f28b3b0770602f4bb810000000000000000000000000000000000000000000000000000000000000005000000000000000000000000c9232f71bfcace67372f2497a71a5c4fdcaf101f000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000200000000000000000000000027428dd2d3dd32a4d7f7c497eaaa23130d894911000000000000000000000000b5031602c25296ac7029b345fda15915a943aa86
-----Decoded View---------------
Arg [0] : _hubContractAddress (bytes32): 0x00000000000000000000000098ca1cbcf337e500c7557f28b3b0770602f4bb81
Arg [1] : _hubContractChainId (uint16): 5
Arg [2] : _token (address): 0xC9232f71bfCaCe67372f2497A71A5c4FdCAf101F
Arg [3] : _targetSecondsPerBlock (uint256): 12
Arg [4] : _chainId (uint16): 2
Arg [5] : _wormholeRelayerAddress (address): 0x27428DD2d3DD32A4D7f7C497eAaa23130d894911
Arg [6] : _magistrateAddress (address): 0xb5031602C25296ac7029B345FDa15915a943Aa86
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 00000000000000000000000098ca1cbcf337e500c7557f28b3b0770602f4bb81
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000005
Arg [2] : 000000000000000000000000c9232f71bfcace67372f2497a71a5c4fdcaf101f
Arg [3] : 000000000000000000000000000000000000000000000000000000000000000c
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [5] : 00000000000000000000000027428dd2d3dd32a4d7f7c497eaaa23130d894911
Arg [6] : 000000000000000000000000b5031602c25296ac7029b345fda15915a943aa86
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Net Worth in USD
$9.99
Net Worth in ETH
0.004991
Token Allocations
ETH
100.00%
Multichain Portfolio | 33 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
|---|---|---|---|---|---|
| ETH | 100.00% | $1,999.69 | 0.00499533 | $9.99 |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.