Contract Source Code:
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "./EnumerableSet.sol";
import "./Address.sol";
import "./Context.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* 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:
*
* ```
* 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}:
*
* ```
* 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.
*/
abstract contract AccessControl is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @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 {_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) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index)
public
view
returns (address)
{
return _roles[role].members.at(index);
}
/**
* @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 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.
*/
function grantRole(bytes32 role, address account) public virtual {
require(
hasRole(_roles[role].adminRole, _msgSender()),
"AccessControl: sender must be an admin to grant"
);
_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.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(
hasRole(_roles[role].adminRole, _msgSender()),
"AccessControl: sender must be an admin to revoke"
);
_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 granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
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.
*
* [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}.
* ====
*/
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 {
emit RoleAdminChanged(role, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @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
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash
= 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly {
codehash := extcodehash(account)
}
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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://diligence.consensys.net/posts/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/v0.5.11/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"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(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 functionCall(target, data, "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"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
if (success) {
return returndata;
} else {
// 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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
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pragma solidity >=0.6.0;
interface AggregatorInterface {
function latestAnswer() external view returns (int256);
function latestTimestamp() external view returns (uint256);
function latestRound() external view returns (uint256);
function getAnswer(uint256 roundId) external view returns (int256);
function getTimestamp(uint256 roundId) external view returns (uint256);
event AnswerUpdated(
int256 indexed current,
uint256 indexed roundId,
uint256 timestamp
);
event NewRound(
uint256 indexed roundId,
address indexed startedBy,
uint256 startedAt
);
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "./Context.sol";
import "./IERC20.sol";
import "./SafeMath.sol";
import "./Address.sol";
import "./AccessControl.sol";
import "./PriceFeed.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
*/
contract Brrr is Context, IERC20, AccessControl, PriceFeed {
bool public Online = true;
modifier isOffline {
_;
require(!Online, "Contract is running still");
}
modifier isOnline {
_;
require(Online, "Contract has been turned off");
}
using SafeMath for uint256;
using Address for address;
IERC20 Tether;
bytes32 public constant FOUNDING_FATHER = keccak256("FOUNDING_FATHER");
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
//list of accepted coins for transferring
mapping(address => bool) public _acceptedStableCoins;
//address of the oracle price feed for accept coins
mapping(address => address) private _contract_address_to_oracle;
//deposits for each user in eth
mapping(address => uint256) public _deposits_eth;
//total withdrawals per user
mapping(address => uint256) public _total_withdrawals;
//deposits for each user in their coins
mapping(address => mapping(address => uint256)) public _coin_deposits;
//claimed stimulus per user per stimulus
mapping(address => mapping(uint128 => bool)) public _claimed_stimulus;
//all stimulus ids
mapping(uint128 => bool) public _all_Claim_ids;
//stimulus id to stimulus info
mapping(uint128 => Claims) public _all_Claims;
//tether total supply checks/history
supplyCheck[] public _all_supply_checks;
//total coins related to tether in reserves
uint256 public TreasuryReserve;
uint256 private _totalSupply;
//max limit
uint256 public TOTALCAP = 8000000000000000 * 10**18;
//total coins in circulation
uint256 public _circulatingSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
//usdt address
address public tether = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
//brrr3x address
address public brrr3x;
//brrr10x address
address public brrr10x;
struct Claims {
uint256 _amount;
uint256 _ending;
uint256 _amount_to_give;
}
struct supplyCheck {
uint256 _last_check;
uint256 _totalSupply;
}
event Withdraw(address indexed _reciever, uint256 indexed _amount);
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* Sets the total supply from tether
*
* Gives founding father liquidity share for uniswap
*
* Sets first supply check
*
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setupRole(FOUNDING_FATHER, msg.sender);
Tether = IERC20(tether);
uint256 d = Tether.totalSupply();
TreasuryReserve = d * 10**13;
_balances[msg.sender] = 210000000 * 10**18;
_circulatingSupply = 210000000 * 10**18;
_totalSupply = TreasuryReserve.sub(_circulatingSupply);
TreasuryReserve = TreasuryReserve.sub(_circulatingSupply);
supplyCheck memory sa = supplyCheck(block.timestamp, d);
_all_supply_checks.push(sa);
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _circulatingSupply.add(TreasuryReserve);
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* If address is approved brrr3x or brrr10x address don't check allowance and allow 1 transaction transfer (no approval needed)
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
if (msg.sender != brrr3x && msg.sender != brrr10x) {
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens from tether burning tokens
*
* Cannot go past cap.
*
* Emits a {Transfer} event with `from` set to the zero address.
*/
function _printerGoesBrrr(uint256 amount) internal returns (bool) {
require(amount > 0, "Can't mint 0 tokens");
require(TreasuryReserve.add(amount) < cap(), "Cannot exceed cap");
TreasuryReserve = TreasuryReserve.add(amount);
_totalSupply = TreasuryReserve;
emit Transfer(address(0), address(this), amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual isOnline {
require(account != address(0), "ERC20: mint to the zero address");
require(amount <= TreasuryReserve, "More than the reserve holds");
_circulatingSupply = _circulatingSupply.add(amount);
TreasuryReserve = TreasuryReserve.sub(amount);
_totalSupply = TreasuryReserve;
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `TreasuryReserve`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `Treasury Reserve` must have at least `amount` tokens.
*/
function _burn(uint256 amount) internal virtual {
if (amount <= TreasuryReserve) {
TreasuryReserve = TreasuryReserve.sub(
amount,
"ERC20: burn amount exceeds Treasury Reserve"
);
_totalSupply = TreasuryReserve;
emit Transfer(address(this), address(0), amount);
} else {
TreasuryReserve = 0;
_totalSupply = TreasuryReserve;
emit Transfer(address(this), address(0), amount);
}
}
/**
* @dev Returns the users deposit in ETH and changes the circulating supply and treasury reserves based off the brrr sent back
*
*
* Emits withdraw event.
*
*
*/
function _payBackBrrrETH(
uint256 _brrrAmount,
address payable _owner,
uint256 _returnAmount
) internal returns (bool) {
require(
_deposits_eth[_owner] >= _returnAmount,
"More than deposit amount"
);
_balances[_owner] = _balances[_owner].sub(_brrrAmount);
TreasuryReserve = TreasuryReserve.add(_brrrAmount);
_totalSupply = TreasuryReserve;
_circulatingSupply = _circulatingSupply.sub(_brrrAmount);
emit Transfer(address(_owner), address(this), _brrrAmount);
_deposits_eth[_owner] = _deposits_eth[_owner].sub(_returnAmount);
_transferEth(_owner, _returnAmount);
emit Withdraw(address(_owner), _returnAmount);
return true;
}
/**
* @dev Returns the users deposit in alt coins and changes the circulating supply and treasury reserves based off the brrr sent back
*
*
* Emits withdraw event.
*
*
*/
function _payBackBrrrCoins(
uint256 _brrrAmount,
address payable _owner,
address _contract,
uint256 _returnAmount
) internal returns (bool) {
require(
_coin_deposits[_owner][_contract] >= _returnAmount,
"More than deposit amount"
);
_balances[_owner] = _balances[_owner].sub(_brrrAmount);
TreasuryReserve = TreasuryReserve.add(_brrrAmount);
_totalSupply = TreasuryReserve;
_circulatingSupply = _circulatingSupply.sub(_brrrAmount);
emit Transfer(address(_owner), address(this), _brrrAmount);
_coin_deposits[_owner][_contract] = _coin_deposits[_owner][_contract]
.sub(_returnAmount);
_transferCoin(_owner, _contract, _returnAmount);
emit Withdraw(address(_owner), _returnAmount);
return true;
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Gives user reward for updating the total supply.
*/
function _giveReward(uint256 reward) internal returns (bool) {
_circulatingSupply = _circulatingSupply.add(reward);
_balances[_msgSender()] = _balances[_msgSender()].add(reward);
emit Transfer(address(this), address(_msgSender()), reward);
return true;
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Returns the cap on the token's total supply.
*/
function cap() public view returns (uint256) {
return TOTALCAP;
}
/**
* @dev Returns the price of the bonding curve divided by number of withdrawals the user has already made.
*
* Prevents spamming deposit -> withdrawal -> deposit... to drain all brrr.
*/
function calculateWithdrawalPrice() internal view returns (uint256) {
uint256 p = calculateCurve();
uint256 w = _total_withdrawals[_msgSender()];
if (w < 1) {
w = 1;
}
p = p.div(w);
return p;
}
/**
* @dev Internal transfer eth function
*
*/
function _transferEth(address payable _recipient, uint256 _amount)
internal
returns (bool)
{
_recipient.transfer(_amount);
return true;
}
/**
* @dev Internal transfer altcoin function
*
*/
function _transferCoin(
address _owner,
address _contract,
uint256 _returnAmount
) internal returns (bool) {
IERC20 erc;
erc = IERC20(_contract);
require(
erc.balanceOf(address(this)) >= _returnAmount,
"Not enough funds to transfer"
);
require(erc.transfer(_owner, _returnAmount));
return true;
}
/**@dev Adds another token to the accepted coins for printing
*
*
* Calling conditions:
*
* - Address of the contract to be added
* - Only can be added by founding fathers
* */
function addAcceptedStableCoin(address _contract, address _oracleAddress)
public
isOnline
returns (bool)
{
require(
hasRole(FOUNDING_FATHER, msg.sender),
"Caller is not a Founding Father"
);
_acceptedStableCoins[_contract] = true;
_contract_address_to_oracle[_contract] = _oracleAddress;
return _acceptedStableCoins[_contract];
}
/**@dev Adds stimulus package to be claimed by users
*
*
* Calling conditions:
* - Only can be added by founding fathers
* */
function addStimulus(
uint128 _id,
uint256 _total_amount,
uint256 _ending_in_days,
uint256 _amount_to_get
) public isOnline returns (bool) {
require(
hasRole(FOUNDING_FATHER, msg.sender),
"Caller is not a Founding Father"
);
require(_all_Claim_ids[_id] == false, "ID already used");
require(_total_amount <= TreasuryReserve);
_all_Claim_ids[_id] = true;
_all_Claims[_id]._amount = _total_amount * 10**18;
_all_Claims[_id]._amount_to_give = _amount_to_get;
_all_Claims[_id]._ending = block.timestamp + (_ending_in_days * 1 days);
return true;
}
/**@dev Claim a stimulus package.
*
* requires _id of stimulus package.
* Calling conditions:
* - can only claim once
* - must not be ended
* - must not be out of funds.
* */
function claimStimulus(uint128 _id) public isOnline returns (bool) {
require(_all_Claim_ids[_id], "Claim not valid");
require(
_claimed_stimulus[_msgSender()][_id] == false,
"Already claimed!"
);
require(
block.timestamp <= _all_Claims[_id]._ending,
"Stimulus package has ended"
);
require(
_all_Claims[_id]._amount >= _all_Claims[_id]._amount_to_give,
"Out of money :("
);
_claimed_stimulus[_msgSender()][_id] = true;
_all_Claims[_id]._amount = _all_Claims[_id]._amount.sub(
_all_Claims[_id]._amount_to_give * 10**18
);
_mint(_msgSender(), _all_Claims[_id]._amount_to_give * 10**18);
return true;
}
/** Bonding curve
* circulating * reserve ratio / total supply
* circulating * .10 / totalSupply
*
* */
function calculateCurve() public override view returns (uint256) {
uint256 p = (
(_circulatingSupply.mul(10).div(100) * 10**18).div(TreasuryReserve)
);
if (p <= 0) {
p = 1;
}
return p;
}
/**@dev Deposit eth and get the value of brrr based off bonding curve
*
*
* */
function printWithETH() public payable isOnline returns (bool) {
require(
msg.value > 0,
"Please send money to make the printer go brrrrrrrr"
);
uint256 p = calculateCurve();
uint256 amount = (msg.value.mul(10**18).div(p));
require(amount > 0, "Not enough sent for 1 brrr");
_deposits_eth[_msgSender()] = _deposits_eth[_msgSender()].add(
msg.value
);
_mint(_msgSender(), amount);
return true;
}
/**@dev Deposit alt coins and get the value of brrr based off bonding curve
*
*
* */
function printWithStablecoin(address _contract, uint256 _amount)
public
isOnline
returns (bool)
{
require(
_acceptedStableCoins[_contract],
"Not accepted as a form of payment"
);
IERC20 erc;
erc = IERC20(_contract);
uint256 al = erc.allowance(_msgSender(), address(this));
require(al >= _amount, "Token allowance not enough");
uint256 p = calculateCurve();
uint256 tp = getLatestPrice(_contract_address_to_oracle[_contract]);
uint256 a = _amount.mul(tp).div(p);
require(a > 0, "Not enough sent for 1 brrr");
require(
erc.transferFrom(_msgSender(), address(this), _amount),
"Transfer failed"
);
_coin_deposits[_msgSender()][_contract] = _coin_deposits[_msgSender()][_contract]
.add(_amount);
_mint(_msgSender(), a);
return true;
}
/**@dev Internal transfer from brrr3x or brrr10x in order to transfer and update balances
*
*
* */
function _transferBrr(address _contract) internal returns (bool) {
IERC20 brr;
brr = IERC20(_contract);
uint256 brrbalance = brr.balanceOf(_msgSender());
if (brrbalance > 0) {
require(
brr.transferFrom(_msgSender(), address(this), brrbalance),
"Transfer failed"
);
_mint(_msgSender(), brrbalance);
}
return true;
}
/**@dev Transfers entire brrrX balance into brrr at 1 to 1
* Deposits on brrrX will not be cleared.
*
* */
function convertBrrrXintoBrrr() public isOnline returns (bool) {
_transferBrr(address(brrr3x));
_transferBrr(address(brrr10x));
return true;
}
/**@dev Deposit brrr and get the value of eth for that amount of brrr based off bonding curve
*
*
* */
function returnBrrrForETH() public isOnline returns (bool) {
require(_deposits_eth[_msgSender()] > 0, "You have no deposits");
require(_balances[_msgSender()] > 0, "No brrr balance");
uint256 p = calculateWithdrawalPrice();
uint256 r = _deposits_eth[_msgSender()].div(p).mul(10**18);
if (_balances[_msgSender()] >= r) {
_payBackBrrrETH(r, _msgSender(), _deposits_eth[_msgSender()]);
} else {
uint256 t = _balances[_msgSender()].mul(p).div(10**18);
require(
t <= _balances[_msgSender()],
"More than in your balance, error with math"
);
_payBackBrrrETH(_balances[_msgSender()], _msgSender(), t);
}
_total_withdrawals[_msgSender()] = _total_withdrawals[_msgSender()].add(
1
);
}
/**@dev Deposit brrr and get the value of alt coins for that amount of brrr based off bonding curve
*
*
* */
function returnBrrrForCoins(address _contract)
public
isOnline
returns (bool)
{
require(
_acceptedStableCoins[_contract],
"Not accepted as a form of payment"
);
require(
_coin_deposits[_msgSender()][_contract] != 0,
"You have no deposits"
);
require(_balances[_msgSender()] > 0, "No brrr balance");
uint256 o = calculateWithdrawalPrice();
uint256 rg = getLatestPrice(_contract_address_to_oracle[_contract]);
uint256 y = _coin_deposits[_msgSender()][_contract].mul(rg).div(o);
if (_balances[_msgSender()] >= y) {
_payBackBrrrCoins(
y,
_msgSender(),
_contract,
_coin_deposits[_msgSender()][_contract]
);
} else {
uint256 t = _balances[_msgSender()].mul(o).div(rg).div(10**18);
require(
t <= _balances[_msgSender()],
"More than in your balance, error with math"
);
_payBackBrrrCoins(
_balances[_msgSender()],
_msgSender(),
_contract,
t
);
}
_total_withdrawals[_msgSender()] = _total_withdrawals[_msgSender()].add(
1
);
}
/**@dev Update the total supply from tether - if tether has changed total supply.
*
* Makes the money printer go brrrrrrrr
* Reward is given to whoever updates
* */
function brrrEvent() public isOnline returns (uint256) {
require(
block.timestamp >
_all_supply_checks[_all_supply_checks.length.sub(1)]
._last_check,
"Already checked!"
);
uint256 l = _all_supply_checks[_all_supply_checks.length.sub(1)]
._last_check;
uint256 s = _all_supply_checks[_all_supply_checks.length.sub(1)]
._totalSupply;
uint256 d = Tether.totalSupply();
require(d != s, "The supply hasn't changed");
if (d < s) {
supplyCheck memory sa = supplyCheck(block.timestamp, d);
_all_supply_checks.push(sa);
d = (s.sub(d)) * 10**12;
uint256 reward = d.div(1000);
d = d.sub(reward);
_printerGoesBrrr(d);
_giveReward(reward);
return reward;
}
if (d > s) {
supplyCheck memory sa = supplyCheck(block.timestamp, d);
_all_supply_checks.push(sa);
d = (d.sub(s)) * 10**12;
uint256 reward = d.div(1000);
d = d.sub(reward);
_burn(d);
_giveReward(reward);
return reward;
}
}
/**@dev In case of emgergency - withdrawal all eth.
*
* Contract must be offline
*
* */
function EmergencyWithdrawalETH() public isOffline returns (bool) {
require(!Online, "Contract is not turned off");
require(_deposits_eth[_msgSender()] > 0, "You have no deposits");
_payBackBrrrETH(
_balances[_msgSender()],
_msgSender(),
_deposits_eth[_msgSender()]
);
return true;
}
/**@dev In case of emgergency - withdrawal all coins.
*
* Contract must be offline
*
* */
function EmergencyWithdrawalCoins(address _contract)
public
isOffline
returns (bool)
{
require(!Online, "Contract is not turned off");
require(
_acceptedStableCoins[_contract],
"Not accepted as a form of payment"
);
require(
_coin_deposits[_msgSender()][_contract] != 0,
"You have no deposits"
);
_payBackBrrrCoins(
_balances[_msgSender()],
_msgSender(),
_contract,
_coin_deposits[_msgSender()][_contract]
);
return true;
}
/**@dev In case of emgergency - turn offline.
*
* Must be admin
*
* */
function toggleOffline() public returns (bool) {
require(
hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
"Caller is not an admin"
);
Online = !Online;
return true;
}
/**@dev Set brrrX addresses. One time, cannot be changed.
*
* Must be admin
*
* */
function setBrrrXAddress(address _brrr3xcontract, address _brrr10xcontract)
public
returns (bool)
{
require(
hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
"Caller is not an admin"
);
require(
brrr3x == address(0x0) && brrr10x == address(0x0),
"Already set the addresses"
);
if (_brrr3xcontract != address(0x0)) {
brrr3x = _brrr3xcontract;
}
if (_brrr10xcontract != address(0x0)) {
brrr10x = _brrr10xcontract;
}
}
fallback() external payable {
printWithETH();
}
}
<i class='far fa-question-circle text-muted ms-2' data-bs-trigger='hover' data-bs-toggle='tooltip' data-bs-html='true' data-bs-title='Click on the check box to select individual contract to compare. Only 1 contract can be selected from each side.'></i>
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "./Context.sol";
import "./IERC20.sol";
import "./SafeMath.sol";
import "./Address.sol";
import "./AccessControl.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
*/
contract Brrr10x is Context, IERC20, AccessControl {
bool public Online = true;
modifier isOffline {
_;
require(!Online, "Contract is running still");
}
modifier isOnline {
_;
require(Online, "Contract has been turned off");
}
using SafeMath for uint256;
using Address for address;
IERC20 Tether;
bytes32 public constant FOUNDING_FATHER = keccak256("FOUNDING_FATHER");
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => uint256) public _deposits_brrr;
mapping(address => uint256) public _total_withdrawals;
supplyCheck[] public _all_supply_checks;
uint256 public TreasuryReserve;
uint256 private _totalSupply;
uint256 public TOTALCAP = 8000000000000000 * 10**18;
uint256 private _circulatingSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
address public tether = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
address public brrr;
struct supplyCheck {
uint256 _last_check;
uint256 _totalSupply;
}
event Withdraw(address indexed _reciever, uint256 indexed _amount);
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(
string memory name,
string memory symbol,
address _brrr
) public {
_name = name;
_symbol = symbol;
_decimals = 18;
brrr = _brrr;
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setupRole(FOUNDING_FATHER, msg.sender);
Tether = IERC20(tether);
_balances[msg.sender] = 100000000 * 10**18;
_circulatingSupply = 100000000 * 10**18;
uint256 d = Tether.totalSupply();
TreasuryReserve = d * 10**12;
_totalSupply = TreasuryReserve;
supplyCheck memory sa = supplyCheck(block.timestamp, d);
_all_supply_checks.push(sa);
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _circulatingSupply.add(TreasuryReserve);
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
if (msg.sender != brrr) {
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens from tether burning tokens
*
*
* Emits a {Transfer} event with `from` set to the zero address.
*/
function _printerGoesBrrr(uint256 amount) internal returns (bool) {
require(amount > 0, "Can't mint 0 tokens");
require(TreasuryReserve.add(amount) < cap(), "Cannot exceed cap");
TreasuryReserve = TreasuryReserve.add(amount);
_totalSupply = TreasuryReserve;
emit Transfer(address(0), address(this), amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual isOnline {
require(account != address(0), "ERC20: mint to the zero address");
require(amount <= TreasuryReserve, "More than the reserve holds");
_circulatingSupply = _circulatingSupply.add(amount);
_totalSupply = _totalSupply.sub(amount);
TreasuryReserve = TreasuryReserve.sub(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `TreasuryReserve`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `Treasury Reserve` must have at least `amount` tokens.
*/
function _burn(uint256 amount) internal virtual {
if (amount <= TreasuryReserve) {
TreasuryReserve = TreasuryReserve.sub(
amount,
"ERC20: burn amount exceeds Treasury Reserve"
);
_totalSupply = TreasuryReserve;
emit Transfer(address(this), address(0), amount);
} else {
TreasuryReserve = 0;
_totalSupply = TreasuryReserve;
emit Transfer(address(this), address(0), amount);
}
}
function _payBackBrrr(
uint256 _brrrAmount,
address payable _owner,
uint256 _returnAmount
) internal returns (bool) {
require(
_deposits_brrr[_owner] >= _returnAmount,
"More than deposit amount"
);
_balances[_owner] = _balances[_owner].sub(_brrrAmount);
TreasuryReserve = TreasuryReserve.add(_brrrAmount);
_totalSupply = TreasuryReserve;
_circulatingSupply = _circulatingSupply.sub(_brrrAmount);
emit Transfer(address(_owner), address(this), _brrrAmount);
_deposits_brrr[_owner] = _deposits_brrr[_owner].sub(_returnAmount);
_transferCoin(_owner, brrr, _returnAmount);
emit Withdraw(address(_owner), _returnAmount);
return true;
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Returns the cap on the token's total supply.
*/
function cap() public view returns (uint256) {
return TOTALCAP;
}
function calculateWithdrawalPrice() internal view returns (uint256) {
uint256 p = calculateCurve();
uint256 w = _total_withdrawals[_msgSender()];
if (w < 1) {
w = 1;
}
p = p.div(w);
return p;
}
function _transferEth(address payable _recipient, uint256 _amount)
internal
returns (bool)
{
_recipient.transfer(_amount);
return true;
}
function _transferCoin(
address _owner,
address _contract,
uint256 _returnAmount
) internal returns (bool) {
IERC20 erc;
erc = IERC20(_contract);
require(
erc.balanceOf(address(this)) >= _returnAmount,
"Not enough funds to transfer"
);
require(erc.transfer(_owner, _returnAmount));
return true;
}
/** Bonding curve
* circulating * reserve ratio / total supply
* circulating * .50 / totalSupply
*
* */
function calculateCurve() public override view returns (uint256) {
return (
(_circulatingSupply.mul(50).div(100) * 10**18).div(TreasuryReserve)
);
}
function printWithBrrr(uint256 _amount) public isOnline returns (bool) {
require(brrr != address(0x0), "Brrr contract not set");
IERC20 brr;
brr = IERC20(brrr);
uint256 al = brr.balanceOf(_msgSender());
require(al >= _amount, "Token balance not enough");
uint256 p = calculateCurve();
uint256 tp = brr.calculateCurve();
uint256 a = _amount.mul(tp).div(p);
require(a > 0, "Not enough sent for 1 brrr");
require(
brr.transferFrom(_msgSender(), address(this), _amount),
"Transfer failed"
);
_deposits_brrr[_msgSender()] = _deposits_brrr[_msgSender()].add(
_amount
);
_mint(_msgSender(), a);
return true;
}
function returnBrrrForBrrr() public isOnline returns (bool) {
require(brrr != address(0x0), "Brrr contract not set");
require(_deposits_brrr[_msgSender()] != 0, "You have no deposits");
require(_balances[_msgSender()] > 0, "No brrr balance");
uint256 o = calculateWithdrawalPrice();
uint256 rg = _deposits_brrr[_msgSender()].div(o).mul(10**18);
if (_balances[_msgSender()] >= rg) {
_payBackBrrr(rg, _msgSender(), _deposits_brrr[_msgSender()]);
} else {
uint256 t = _balances[_msgSender()].mul(o).div(10**18);
require(
t <= _balances[_msgSender()],
"More than in your balance, error with math"
);
_payBackBrrr(_balances[_msgSender()], _msgSender(), t);
}
_total_withdrawals[_msgSender()] = _total_withdrawals[_msgSender()].add(
1
);
}
/**@dev Update the total supply from tether - if tether has changed total supply.
*
* Makes the money printer go brrrrrrrr
* Reward is given to whoever updates
* */
function brrrEvent() public isOnline returns (uint256) {
require(
block.timestamp >
_all_supply_checks[_all_supply_checks.length.sub(1)]
._last_check,
"Already checked!"
);
uint256 l = _all_supply_checks[_all_supply_checks.length.sub(1)]
._last_check;
uint256 s = _all_supply_checks[_all_supply_checks.length.sub(1)]
._totalSupply;
uint256 d = Tether.totalSupply();
require(d != s, "The supply hasn't changed");
if (d < s) {
supplyCheck memory sa = supplyCheck(block.timestamp, d);
_all_supply_checks.push(sa);
d = (s.sub(d)) * 10**12;
uint256 reward = d.div(1000);
d = d.sub(reward);
_printerGoesBrrr(d.mul(10));
_circulatingSupply = _circulatingSupply.add(reward);
_balances[_msgSender()] = _balances[_msgSender()].add(reward);
emit Transfer(address(this), address(_msgSender()), reward);
return reward;
}
if (d > s) {
supplyCheck memory sa = supplyCheck(block.timestamp, d);
_all_supply_checks.push(sa);
d = (d.sub(s)) * 10**12;
uint256 reward = d.div(1000);
d = d.sub(reward);
_burn(d.mul(10));
_circulatingSupply = _circulatingSupply.add(reward);
_balances[_msgSender()] = _balances[_msgSender()].add(reward);
emit Transfer(address(this), address(_msgSender()), reward);
return reward;
}
}
function EmergencyWithdrawal() public isOffline returns (bool) {
require(!Online, "Contract is not turned off");
require(_deposits_brrr[_msgSender()] > 0, "You have no deposits");
_payBackBrrr(
_balances[_msgSender()],
_msgSender(),
_deposits_brrr[_msgSender()]
);
return true;
}
function toggleOffline() public returns (bool) {
require(
hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
"Caller is not an admin"
);
Online = !Online;
return true;
}
function setBrrrAddress(address _brrrcontract) public returns (bool) {
require(
hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
"Caller is not an admin"
);
require(_brrrcontract != address(0x0), "Invalid address!");
brrr = _brrrcontract;
}
fallback() external payable {
revert();
}
}
<i class='far fa-question-circle text-muted ms-2' data-bs-trigger='hover' data-bs-toggle='tooltip' data-bs-html='true' data-bs-title='Click on the check box to select individual contract to compare. Only 1 contract can be selected from each side.'></i>
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "./Context.sol";
import "./IERC20.sol";
import "./SafeMath.sol";
import "./Address.sol";
import "./AccessControl.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
*/
contract Brrr3x is Context, IERC20, AccessControl {
bool public Online = true;
modifier isOffline {
_;
require(!Online, "Contract is running still");
}
modifier isOnline {
_;
require(Online, "Contract has been turned off");
}
using SafeMath for uint256;
using Address for address;
IERC20 Tether;
bytes32 public constant FOUNDING_FATHER = keccak256("FOUNDING_FATHER");
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => uint256) public _deposits_brrr;
mapping(address => uint256) public _total_withdrawals;
supplyCheck[] public _all_supply_checks;
uint256 public TreasuryReserve;
uint256 private _totalSupply;
uint256 public TOTALCAP = 8000000000000000 * 10**18;
uint256 private _circulatingSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
address public tether = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
address public brrr;
struct supplyCheck {
uint256 _last_check;
uint256 _totalSupply;
}
event Withdraw(address indexed _reciever, uint256 indexed _amount);
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(
string memory name,
string memory symbol,
address _brrr
) public {
_name = name;
_symbol = symbol;
_decimals = 18;
brrr = _brrr;
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setupRole(FOUNDING_FATHER, msg.sender);
Tether = IERC20(tether);
_balances[msg.sender] = 100000000 * 10**18;
_circulatingSupply = 100000000 * 10**18;
uint256 d = Tether.totalSupply();
TreasuryReserve = d * 10**12;
_totalSupply = TreasuryReserve;
supplyCheck memory sa = supplyCheck(block.timestamp, d);
_all_supply_checks.push(sa);
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _circulatingSupply.add(TreasuryReserve);
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
if (msg.sender != brrr) {
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
}
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens from tether burning tokens
*
*
* Emits a {Transfer} event with `from` set to the zero address.
*/
function _printerGoesBrrr(uint256 amount) internal returns (bool) {
require(amount > 0, "Can't mint 0 tokens");
require(TreasuryReserve.add(amount) < cap(), "Cannot exceed cap");
TreasuryReserve = TreasuryReserve.add(amount);
_totalSupply = TreasuryReserve;
emit Transfer(address(0), address(this), amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual isOnline {
require(account != address(0), "ERC20: mint to the zero address");
require(amount <= TreasuryReserve, "More than the reserve holds");
_circulatingSupply = _circulatingSupply.add(amount);
_totalSupply = _totalSupply.sub(amount);
TreasuryReserve = TreasuryReserve.sub(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `TreasuryReserve`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `Treasury Reserve` must have at least `amount` tokens.
*/
function _burn(uint256 amount) internal virtual {
if (amount <= TreasuryReserve) {
TreasuryReserve = TreasuryReserve.sub(
amount,
"ERC20: burn amount exceeds Treasury Reserve"
);
_totalSupply = TreasuryReserve;
emit Transfer(address(this), address(0), amount);
} else {
TreasuryReserve = 0;
_totalSupply = TreasuryReserve;
emit Transfer(address(this), address(0), amount);
}
}
function _payBackBrrr(
uint256 _brrrAmount,
address payable _owner,
uint256 _returnAmount
) internal returns (bool) {
require(
_deposits_brrr[_owner] >= _returnAmount,
"More than deposit amount"
);
_balances[_owner] = _balances[_owner].sub(_brrrAmount);
TreasuryReserve = TreasuryReserve.add(_brrrAmount);
_totalSupply = TreasuryReserve;
_circulatingSupply = _circulatingSupply.sub(_brrrAmount);
emit Transfer(address(_owner), address(this), _brrrAmount);
_deposits_brrr[_owner] = _deposits_brrr[_owner].sub(_returnAmount);
_transferCoin(_owner, brrr, _returnAmount);
emit Withdraw(address(_owner), _returnAmount);
return true;
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Returns the cap on the token's total supply.
*/
function cap() public view returns (uint256) {
return TOTALCAP;
}
function calculateWithdrawalPrice() internal view returns (uint256) {
uint256 p = calculateCurve();
uint256 w = _total_withdrawals[_msgSender()];
if (w < 1) {
w = 1;
}
p = p.div(w);
return p;
}
function _transferEth(address payable _recipient, uint256 _amount)
internal
returns (bool)
{
_recipient.transfer(_amount);
return true;
}
function _transferCoin(
address _owner,
address _contract,
uint256 _returnAmount
) internal returns (bool) {
IERC20 erc;
erc = IERC20(_contract);
require(
erc.balanceOf(address(this)) >= _returnAmount,
"Not enough funds to transfer"
);
require(erc.transfer(_owner, _returnAmount));
return true;
}
/** Bonding curve
* circulating * reserve ratio / total supply
* circulating * .50 / totalSupply
*
* */
function calculateCurve() public override view returns (uint256) {
return (
(_circulatingSupply.mul(50).div(100) * 10**18).div(TreasuryReserve)
);
}
function printWithBrrr(uint256 _amount) public isOnline returns (bool) {
require(brrr != address(0x0), "Brrr contract not set");
IERC20 brr;
brr = IERC20(brrr);
uint256 al = brr.balanceOf(_msgSender());
require(al >= _amount, "Token balance not enough");
uint256 p = calculateCurve();
uint256 tp = brr.calculateCurve();
uint256 a = _amount.mul(tp).div(p);
require(a > 0, "Not enough sent for 1 brrr");
require(
brr.transferFrom(_msgSender(), address(this), _amount),
"Transfer failed"
);
_deposits_brrr[_msgSender()] = _deposits_brrr[_msgSender()].add(
_amount
);
_mint(_msgSender(), a);
return true;
}
function returnBrrrForBrrr() public isOnline returns (bool) {
require(brrr != address(0x0), "Brrr contract not set");
require(_deposits_brrr[_msgSender()] != 0, "You have no deposits");
require(_balances[_msgSender()] > 0, "No brrr balance");
uint256 o = calculateWithdrawalPrice();
uint256 rg = _deposits_brrr[_msgSender()].div(o).mul(10**18);
if (_balances[_msgSender()] >= rg) {
_payBackBrrr(rg, _msgSender(), _deposits_brrr[_msgSender()]);
} else {
uint256 t = _balances[_msgSender()].mul(o).div(10**18);
require(
t <= _balances[_msgSender()],
"More than in your balance, error with math"
);
_payBackBrrr(_balances[_msgSender()], _msgSender(), t);
}
_total_withdrawals[_msgSender()] = _total_withdrawals[_msgSender()].add(
1
);
}
/**@dev Update the total supply from tether - if tether has changed total supply.
*
* Makes the money printer go brrrrrrrr
* Reward is given to whoever updates
* */
function brrrEvent() public isOnline returns (uint256) {
require(
block.timestamp >
_all_supply_checks[_all_supply_checks.length.sub(1)]
._last_check,
"Already checked!"
);
uint256 l = _all_supply_checks[_all_supply_checks.length.sub(1)]
._last_check;
uint256 s = _all_supply_checks[_all_supply_checks.length.sub(1)]
._totalSupply;
uint256 d = Tether.totalSupply();
require(d != s, "The supply hasn't changed");
if (d < s) {
supplyCheck memory sa = supplyCheck(block.timestamp, d);
_all_supply_checks.push(sa);
d = (s.sub(d)) * 10**12;
uint256 reward = d.div(1000);
d = d.sub(reward);
_printerGoesBrrr(d.mul(3));
_circulatingSupply = _circulatingSupply.add(reward);
_balances[_msgSender()] = _balances[_msgSender()].add(reward);
emit Transfer(address(this), address(_msgSender()), reward);
return reward;
}
if (d > s) {
supplyCheck memory sa = supplyCheck(block.timestamp, d);
_all_supply_checks.push(sa);
d = (d.sub(s)) * 10**12;
uint256 reward = d.div(1000);
d = d.sub(reward);
_burn(d.mul(3));
_circulatingSupply = _circulatingSupply.add(reward);
_balances[_msgSender()] = _balances[_msgSender()].add(reward);
emit Transfer(address(this), address(_msgSender()), reward);
return reward;
}
}
function EmergencyWithdrawal() public isOffline returns (bool) {
require(!Online, "Contract is not turned off");
require(_deposits_brrr[_msgSender()] > 0, "You have no deposits");
_payBackBrrr(
_balances[_msgSender()],
_msgSender(),
_deposits_brrr[_msgSender()]
);
return true;
}
function toggleOffline() public returns (bool) {
require(
hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
"Caller is not an admin"
);
Online = !Online;
return true;
}
function setBrrrAddress(address _brrrcontract) public returns (bool) {
require(
hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
"Caller is not an admin"
);
require(_brrrcontract != address(0x0), "Invalid address!");
brrr = _brrrcontract;
}
fallback() external payable {
revert();
}
}
<i class='far fa-question-circle text-muted ms-2' data-bs-trigger='hover' data-bs-toggle='tooltip' data-bs-html='true' data-bs-title='Click on the check box to select individual contract to compare. Only 1 contract can be selected from each side.'></i>
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/*
* @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 GSN 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 Context {
function _msgSender() internal virtual view returns (address payable) {
return msg.sender;
}
function _msgData() internal virtual view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
<i class='far fa-question-circle text-muted ms-2' data-bs-trigger='hover' data-bs-toggle='tooltip' data-bs-html='true' data-bs-title='Click on the check box to select individual contract to compare. Only 1 contract can be selected from each side.'></i>
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
* (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping(bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) {
// Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value)
private
view
returns (bool)
{
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index)
private
view
returns (bytes32)
{
require(
set._values.length > index,
"EnumerableSet: index out of bounds"
);
return set._values[index];
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value)
internal
returns (bool)
{
return _add(set._inner, bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value)
internal
returns (bool)
{
return _remove(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value)
internal
view
returns (bool)
{
return _contains(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index)
internal
view
returns (address)
{
return address(uint256(_at(set._inner, index)));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value)
internal
returns (bool)
{
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value)
internal
view
returns (bool)
{
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index)
internal
view
returns (uint256)
{
return uint256(_at(set._inner, index));
}
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
function calculateCurve() external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
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pragma solidity ^0.6.7;
import "./AggregatorInterface.sol";
contract PriceFeed {
/**
* Network: Rinkeby
* Aggregator: ETH/USD
* Address: 0x0bF4e7bf3e1f6D6Dc29AA516A33134985cC3A5aA
*/
/**
* Returns the latest price
*/
function getLatestPrice(address _address) internal view returns (uint256) {
AggregatorInterface priceFeed = AggregatorInterface(_address);
int256 p = priceFeed.latestAnswer();
require(p > 0, "Invalid price feed!");
return uint256(p);
}
/**
* Returns the timestamp of the latest price update
*/
function getLatestPriceTimestamp(address _address)
internal
view
returns (uint256)
{
AggregatorInterface priceFeed = AggregatorInterface(_address);
return priceFeed.latestTimestamp();
}
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when 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.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// 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 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}