Contract Source Code:
File 1 of 1 : Skills
// File: contracts/MetadataUtils.sol
pragma solidity ^0.8.0;
function toString(uint256 value) pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT license
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/// [MIT License]
/// @title Base64
/// @notice Provides a function for encoding some bytes in base64
/// @author Brecht Devos <brecht@loopring.org>
library Base64 {
bytes internal constant TABLE =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/// @notice Encodes some bytes to the base64 representation
function encode(bytes memory data) internal pure returns (string memory) {
uint256 len = data.length;
if (len == 0) return "";
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((len + 2) / 3);
// Add some extra buffer at the end
bytes memory result = new bytes(encodedLen + 32);
bytes memory table = TABLE;
assembly {
let tablePtr := add(table, 1)
let resultPtr := add(result, 32)
for {
let i := 0
} lt(i, len) {
} {
i := add(i, 3)
let input := and(mload(add(data, i)), 0xffffff)
let out := mload(add(tablePtr, and(shr(18, input), 0x3F)))
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF)
)
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF)
)
out := shl(8, out)
out := add(
out,
and(mload(add(tablePtr, and(input, 0x3F))), 0xFF)
)
out := shl(224, out)
mstore(resultPtr, out)
resultPtr := add(resultPtr, 4)
}
switch mod(len, 3)
case 1 {
mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
}
case 2 {
mstore(sub(resultPtr, 1), shl(248, 0x3d))
}
mstore(result, encodedLen)
}
return string(result);
}
}
// File: contracts/Context.sol
pragma solidity ^0.8.0;
/**
* @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 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 view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: contracts/Ownable.sol
pragma solidity ^0.8.0;
/**
* @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 Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: contracts/ReentrancyGuard.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// File: contracts/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 IERC165 {
/**
* @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);
}
// File: contracts/IERC1155.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
// File: contracts/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: contracts/IERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: contracts/ERC165.sol
pragma solidity ^0.8.0;
/**
* @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 ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: contracts/Address.sol
pragma solidity ^0.8.0;
/**
* @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) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 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://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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(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) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(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) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason 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 {
// 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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: contracts/IERC1155MetadataURI.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
// File: contracts/IERC1155Receiver.sol
pragma solidity ^0.8.0;
/**
* @dev _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@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.
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. 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);
}
// File: contracts/ERC1155.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
using Address for address;
// Mapping from token ID to account balances
mapping(uint256 => mapping(address => uint256)) internal _balances;
// Mapping from account to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/**
* @dev See {_setURI}.
*/
constructor(string memory uri_) {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC1155).interfaceId ||
interfaceId == type(IERC1155MetadataURI).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256) public view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
require(account != address(0), "ERC1155: balance query for the zero address");
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
public
view
virtual
override
returns (uint256[] memory)
{
require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(_msgSender() != operator, "ERC1155: setting approval status for self");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `account`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - If `account` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(
address account,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(account != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][account] += amount;
emit TransferSingle(operator, address(0), account, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), account, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `account`
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address account,
uint256 id,
uint256 amount
) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - amount;
}
emit TransferSingle(operator, account, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(
address account,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - amount;
}
}
emit TransferBatch(operator, account, address(0), ids, amounts);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {}
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155Receiver.onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) private {
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
bytes4 response
) {
if (response != IERC1155Receiver.onERC1155BatchReceived.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
// File: contracts/Skills.sol
//SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.7;
contract Skills is ERC1155, ReentrancyGuard, Ownable {
// first 4 are Epic, second 4 are Rare, remaining are Common
string[] private meleeAttacks = [
"Mortal Wound", // 0
"Heart Thrust", // 1
"Berserker", // 2
"Killing Spree", // 3
"Rage of the Ape", // 4
"Spinal Slice", // 5
"Death Blow", // 6
"Ocular Slash ", // 7
"Grasp of the Kraken", // 8
"Heroic Strike", // 9
"Sweep", // 10
"Backstab", // 11
"Silent Strike", // 12
"Skull Bash", // 13
"Garrote", // 14
"Mutilating Blow", // 15
"Tiger Maul", // 16
"Rune Strike", // 17
"Cleave", // 18
"Dragon Tail Swipe", // 19
"Punch in the Mouth" // 20
];
string[] private rangeAttacks = [
"Multishot", // 0
"Kill Shot", // 1
"Shot Through The Heart", // 2
"Hit and Run", // 3
"Blot Out the Sun", // 4
"Barrage of Bullets", // 5
"Ancestral Arrow", // 6
"Arrow of Armageddon", // 7
"Double Strafe", // 8
"Poison Arrow", // 9
"Tranquilizing Dart", // 10
"Frost Shot", // 11
"Burning Arrow", // 12
"Blinding Bolt", // 13
"Degenerate Dart", // 14
"Shaft of Glory" // 15
];
string[] private elementalSpells = [
"Meteor", // 0
"Earthquake", // 1
"Ball Lightning", // 2
"Blizzard", // 3
"Cataclysm", // 4
"Maelstrom Bolt", // 5
"Black Dragon Breath", // 6
"Comet Strike", // 7
"Fireball", // 8
"Firewall", // 9
"Firestorm", // 10
"Dragon Breath", // 11
"Ice Spear", // 12
"Frost Touch", // 13
"Frozen Heart", // 14
"Frost Cone", // 15
"Electric Personality", // 16
"Lightning Strike", // 17
"Chain Lightning", // 18
"Electric Boogaloo", // 19
"Landslide", // 20
"Sinking Sand", // 21
"Earth Spike", // 22
"Drowning Deluge" // 23
];
string[] private spiritualSpells = [
"Searing Sun", // 0
"Divine Indignation", // 1
"Death and Decay", // 2
"Hurricane of the Mother", // 3
"Divine Retribution", // 4
"Demonic Despair", // 5
"Praise The Sun", // 6
"Pandemonium", // 7
"Light of the Moon", // 8
"Spear of Brilliance", // 9
"Raise Dead", // 10
"Seraph Smite", // 11
"Soul Arrow", // 12
"Arrow of Evil", // 13
"Bolt of Rage", // 14
"Wroth of the Mother", // 15
"Devilish Deed", // 16
"Demon Soul" // 17
];
string[] private curses = [
"Doom", // 0
"Regress to the Mean", // 1
"Curse of the Winner", // 2
"Not Gonna Make It", // 3
"Plague of Frogs", // 4
"Curse of the Ape", // 5
"Bad Morning", // 6
"Demise of the Degenerate", // 7
"Touch of Sorrow", // 8
"Curse of Down Bad", // 9
"Kiss of Death", // 10
"Blight of the Moon", // 11
"Morbid Sun", // 12
"Torment of Titans", // 13
"Agonizing Gaze", // 14
"Change of Heart", // 15
"Curse of Anger" // 16
];
string[] private heals = [
"Divine Touch", // 0
"Soul Glow", // 1
"Time Heals All Wounds", // 2
"Innervate", // 3
"Infectious Heal", // 4
"Raise the Dead", // 5
"Healed and Shield", // 6
"You're Gonna Make It", // 7
"Healing Touch", // 8
"Restoring Wind", // 9
"Healing Current", // 10
"Wellspring", // 11
"Reviving Touch", // 12
"Rejuvenating Surge" // 13
];
string[] private buffs = [
"We're All Gonna Make It", // 0
"Vigor of the Twins", // 1
"Fury of the Ape", // 2
"Invigorating Touch", // 3
"Frozen Touch", // 4
"Blessing of Good Morning", // 5
"Ancient Vitriol", // 6
"Luck and Leverage", // 7
"Dragonskin", // 8
"Sight of Enlightenment", // 9
"Wind In Your Back", // 10
"Fury of Giants", // 11
"Song of Power", // 12
"Cleverness of the Fox", // 13
"Strength of Vengeance", // 14
"Wind Walker", // 15
"Scent of Blood", // 16
"Thick Skin", // 17
"Hymn of Protection", // 18
"Blessing of Light", // 19
"Iron Flesh" // 20
];
string[] private defensiveSkills = [
"Haste of the Fox", // 0
"Blessing of Protection", // 1
"Vanish", // 2
"Sacrifice of the Martyr", // 3
"Evasive Maneuver", // 4
"Perfect Roll", // 5
"Taunt 'Em All", // 6
"Determination of a Degenerate", // 7
"Dodge", // 8
"Protect", // 9
"Taunt", // 10
"Feign Death", // 11
"Counter", // 12
"Shield Block" // 13
];
string[] private namePrefixes = [
"", // 0
"Dom", // 1
"Hoffman", // 2
"Nish", // 3
"Nuge", // 4
"Orgeos", // 5
"Looter", // 6
"Italik", // 7
"Reppap", // 8
"Oni", // 9
"Zurhahs", // 10
"Ackson", // 11
"gm enjoyer", // 12
"Chad", // 13
"Adventurer" // 14
];
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
IERC721Enumerable constant lootContract = IERC721Enumerable(0xFF9C1b15B16263C61d017ee9F65C50e4AE0113D7);
mapping(uint256 => uint256) _genSkillCooldown;
uint256 constant skillIdOffset = 57896044618658097711785492504343953926634992332820282019728792003956564819968; // offset skill ids to halfway into the token id range
uint16 constant setCap = 16000;
uint256 lastMintedSetId = 8223;
// Minting functions
function _claimSet(uint256 setId) private {
uint256[] memory tokenIds = _getSetSkillIds(setId);
uint256[] memory amounts = new uint256[](9);
amounts[0] = uint256(1);
amounts[1] = uint256(1);
amounts[2] = uint256(1);
amounts[3] = uint256(1);
amounts[4] = uint256(1);
amounts[5] = uint256(1);
amounts[6] = uint256(1);
amounts[7] = uint256(1);
amounts[8] = uint256(1);
_mintBatch(_msgSender(), tokenIds, amounts, "");
_owners[setId] = _msgSender();
}
function claimAvailableSet() public {
require(lastMintedSetId <= setCap, "All available sets have been claimed");
_claimSet(lastMintedSetId);
lastMintedSetId++;
}
function claimWithLoot(uint256 tokenId) public {
require(lootContract.ownerOf(tokenId) == _msgSender(), "you do not own the lootbag for this set of skill");
require(!_exists(tokenId), "Set has already been claimed");
_claimSet(tokenId);
}
function claimAllWithLoot() public {
uint256 tokenBalanceOwner = lootContract.balanceOf(_msgSender());
require(tokenBalanceOwner > 0, "You do not own any Loot bags");
for (uint256 i = 0; i < tokenBalanceOwner; i++) {
uint256 lootId = lootContract.tokenOfOwnerByIndex(_msgSender(), i);
if(!_exists(lootId)) {
_claimSet(lootId);
}
}
}
function ownerClaimSet(uint256 setId) public onlyOwner {
require( setId > 8000 && setId < 8223, "Not a reserved Set ID");
require(!_exists(setId), "You already own this set");
_claimSet(setId);
}
function skillUp(uint256 skillId) public {
require(skillId < skillIdOffset, "Please use the Skill ID, not the token ID");
skillId += skillIdOffset;
_burn(_msgSender(), skillId, 2);
uint256 skillId1Up = skillId + 2175; // total skills * total name prefixes
_mint(_msgSender(), skillId1Up, 1, "");
}
function skillDown(uint256 skillId) public {
require(skillId < skillIdOffset, "Please use the Skill ID, not the token ID");
skillId += skillIdOffset;
_burn(_msgSender(), skillId, 1);
uint256 skillId1Down = skillId - 2175;
_mint(_msgSender(), skillId1Down, 2, "");
}
function skillUpMulti(uint256 skillId, uint256 steps) public {
require(skillId < skillIdOffset, "Please use the Skill ID, not the token ID");
require(steps > 0, "Invalid amount of steps");
skillId += skillIdOffset;
_burn(_msgSender(), skillId, 1 << steps);
uint256 skillId1Up = skillId + (2175 * steps) ; // total skills * total name prefixes
_mint(_msgSender(), skillId1Up, 1, "");
}
function skillDownMulti(uint256 skillId, uint256 steps) public {
require(skillId < skillIdOffset, "Please use the Skill ID, not the token ID");
require(steps > 0, "Invalid amount of steps");
skillId += skillIdOffset;
_burn(_msgSender(), skillId, 1);
uint256 skillId1Up = skillId - (2175 * steps) ; // total skills * total name prefixes
_mint(_msgSender(), skillId1Up, 1 << steps, "");
}
function generateSkill(uint256 setId) public {
require(_balances[setId][_msgSender()] > 0, "You do not own this set");
uint256 lastBlock = _genSkillCooldown[setId];
require(lastBlock == 0 || block.number >= lastBlock, "This set has generated a skill too recently");
uint256 rand = uint256(keccak256(abi.encodePacked(setId, block.number ^ block.basefee ^ tx.gasprice )));
uint8 categoryIndex = uint8(rand % 8);
uint8 categoryLength;
if(categoryIndex == 0) categoryLength = 21;
else if(categoryIndex == 1) categoryLength = 16;
else if(categoryIndex == 2) categoryLength = 24;
else if(categoryIndex == 3) categoryLength = 18;
else if(categoryIndex == 4) categoryLength = 17;
else if(categoryIndex == 5) categoryLength = 14;
else if(categoryIndex == 6) categoryLength = 21;
else categoryLength = 14;
uint256 skillId = _getSkillId(rand, categoryIndex, categoryLength) + skillIdOffset;
_mint(_msgSender(), skillId, 1, "");
if( ownsWholeSet(setId) ) _genSkillCooldown[setId] = block.number + 50000;
else _genSkillCooldown[setId] = block.number + 250000;
}
function _exists(uint256 setId) internal view returns (bool) {
return _owners[setId] != address(0);
}
function ownsWholeSet(uint256 setId) public view returns( bool ){
uint256[] memory tokenIds = _getSetSkillIds(setId);
for( uint256 i = 0; i < 9; i++)
{
if( _balances[tokenIds[i]][_msgSender()] == 0 ) return false;
}
return true;
}
// Transfer functions
function transferSkill(address from, address to, uint256 skillId, uint256 amount, bytes memory data) public {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
require(skillId < skillIdOffset, "Please use the Skill ID, not the token ID");
_safeTransferFrom(from, to, skillId + skillIdOffset, amount, data);
}
function batchTransferSkills(address from, address to, uint256[] memory skillIds, uint256[] memory amounts, bytes memory data) public {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
for( uint256 i = 0; i < 145; i++)
{
require(skillIds[i] < skillIdOffset, "Please use the Skill ID, not the token ID");
skillIds[i] += skillIdOffset;
}
_safeBatchTransferFrom(from, to, skillIds, amounts, data);
}
function transferSet(address from, address to, uint256 setId, bytes memory data) public {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
uint256[] memory tokenIds = _getSetSkillIds(setId);
uint256[] memory amounts = new uint256[](9);
amounts[0] = uint256(1);
amounts[1] = uint256(1);
amounts[2] = uint256(1);
amounts[3] = uint256(1);
amounts[4] = uint256(1);
amounts[5] = uint256(1);
amounts[6] = uint256(1);
amounts[7] = uint256(1);
amounts[8] = uint256(1);
_safeBatchTransferFrom(from, to, tokenIds, amounts, data);
}
// Override 1155 transfer functions to handle Set/Skill ID offset
function safeTransferFrom( address from, address to, uint256 id, uint256 amount, bytes memory data ) public override {
if( id >= skillIdOffset )
{
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(from, to, id, amount, data);
}
else
{
transferSet(from, to, id, data);
}
}
function safeBatchTransferFrom( address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
bool setFound = false;
bool skillFound = false;
for( uint256 i = 0; i < ids.length; i++ )
{
if( ids[i] >= skillIdOffset )
{
skillFound = true;
}
else
{
require(amounts[i] == 1, "You cannot transfer more than 1 set as there is only 1 of each");
setFound = true;
}
}
require( !(setFound && skillFound), "Please attempt to only transfer Set IDs or Skill IDs in one batch" );
if( skillFound )
{
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
else
{
for( uint256 i = 0; i < ids.length; i++ )
{
transferSet(from, to, ids[i], data);
}
}
}
// Skill data
function getSkillString(uint256 skillId) public view returns (string memory)
{
string memory output;
uint256 skillIndex = skillId / 145;
uint256 skillBaseId = skillId % 145;
if( skillBaseId < 21 )
{
output = meleeAttacks[skillBaseId];
}
else if( skillBaseId < 37 )
{
output = rangeAttacks[skillBaseId - 21];
}
else if( skillBaseId < 61 )
{
output = elementalSpells[skillBaseId - 37];
}
else if( skillBaseId < 79 )
{
output = spiritualSpells[skillBaseId - 61];
}
else if( skillBaseId < 96 )
{
output = curses[skillBaseId - 79];
}
else if( skillBaseId < 110 )
{
output = heals[skillBaseId - 96];
}
else if( skillBaseId < 131 )
{
output = buffs[skillBaseId - 110];
}
else
{
output = defensiveSkills[skillBaseId - 131];
}
uint256 skillNamePrefix = skillIndex % 15; // namePrefixes.length
if( skillNamePrefix > 0 )
{
output = string(abi.encodePacked(namePrefixes[skillNamePrefix], "'s ", output));
}
uint256 skillLevel = skillIndex / 15; // namePrefixes.length
if( skillLevel > 0 )
{
output = string(abi.encodePacked(output, " +", toString(skillLevel)));
}
return output;
}
function _getSkillId(uint256 setId, uint8 categoryIndex, uint8 categoryLength) internal view returns (uint256 skillId) {
uint256 rand = uint256(keccak256(abi.encodePacked(setId, categoryIndex)));
uint256 rarity = rand % 1000;
if (rarity < 4)
{
skillId = rand % categoryLength % 4;
}
else if (rarity < 40)
{
skillId = rand % categoryLength % 4 + 4;
}
else
{
skillId = rand % (categoryLength - 8) + 8;
}
skillId += categoryIndex;
uint256 nameRand = uint256(keccak256(abi.encodePacked(rand))) % 1000;
if (nameRand < 40)
{
skillId = (nameRand % 15) * 145 + skillId;
}
return skillId;
}
function _getSetSkillIds(uint256 setId) internal view returns (uint256[] memory) {
uint256[] memory tokenIds = new uint256[](9);
tokenIds[0] = _getSkillId(setId, 0, 21) + skillIdOffset; // meleeAttacks
tokenIds[1] = _getSkillId(setId, 21, 16) + skillIdOffset; // rangeAttacks
tokenIds[2] = _getSkillId(setId, 37, 24) + skillIdOffset; // elementalSpells
tokenIds[3] = _getSkillId(setId, 61, 18) + skillIdOffset; // spiritualSpells
tokenIds[4] = _getSkillId(setId, 79, 17) + skillIdOffset; // curses
tokenIds[5] = _getSkillId(setId, 96, 14) + skillIdOffset; // heals
tokenIds[6] = _getSkillId(setId, 110, 21) + skillIdOffset; // buffs
tokenIds[7] = _getSkillId(setId, 131, 14) + skillIdOffset; // defensiveSkills
tokenIds[8] = setId;
return tokenIds;
}
// get functions
function getGenSkillCooldown(uint256 setId) public view returns (uint256) {
require( setId < skillIdOffset, "Not a valid Set ID");
return _genSkillCooldown[setId];
}
function balanceOfSkill(address account, uint256 skillId) public view returns (uint256) {
require( skillId < skillIdOffset, "Please use the Skill ID, not the token ID");
return _balances[skillId + skillIdOffset][account];
}
function getMeleeAttack(uint256 setId) public view returns (string memory) {
require( setId < skillIdOffset, "Not a valid Set ID");
return getSkillString(_getSkillId(setId, 0, 21));
}
function getRangeAttack(uint256 setId) public view returns (string memory) {
require( setId < skillIdOffset, "Not a valid Set ID");
return getSkillString(_getSkillId(setId, 21, 16));
}
function getElementalSpell(uint256 setId) public view returns (string memory) {
require( setId < skillIdOffset, "Not a valid Set ID");
return getSkillString(_getSkillId(setId, 37, 24));
}
function getSpiritualSpell(uint256 setId) public view returns (string memory) {
require( setId < skillIdOffset, "Not a valid Set ID");
return getSkillString(_getSkillId(setId, 61, 18));
}
function getCurse(uint256 setId) public view returns (string memory) {
require( setId < skillIdOffset, "Not a valid Set ID");
return getSkillString(_getSkillId(setId, 79, 17));
}
function getHeal(uint256 setId) public view returns (string memory) {
require( setId < skillIdOffset, "Not a valid Set ID");
return getSkillString(_getSkillId(setId, 96, 14));
}
function getBuff(uint256 setId) public view returns (string memory) {
require( setId < skillIdOffset, "Not a valid Set ID");
return getSkillString(_getSkillId(setId, 110, 21));
}
function getDefensiveSkill(uint256 setId) public view returns (string memory) {
require( setId < skillIdOffset, "Not a valid Set ID");
return getSkillString(_getSkillId(setId, 131, 14));
}
function uri(uint256 tokenId) override public view returns (string memory) {
if( tokenId > skillIdOffset )
{
string[3] memory parts;
parts[0] = '<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMinYMin meet" viewBox="0 0 350 350"><style>.base { fill: white; font-family: serif; font-size: 14px; }</style><rect width="100%" height="100%" fill="black" /><text x="10" y="20" class="base">';
parts[1] = getSkillString(tokenId - skillIdOffset);
parts[2] = '</text></svg>';
string memory output = string(abi.encodePacked(parts[0], parts[1], parts[2]));
string memory json = Base64.encode(bytes(string(abi.encodePacked('{"name": "Skill #', toString(tokenId - skillIdOffset), '", "description": "Skills are randomized adventurer abilities generated and stored on chain.", "image": "data:image/svg+xml;base64,', Base64.encode(bytes(output)), '"}'))));
output = string(abi.encodePacked('data:application/json;base64,', json));
return output;
}
else
{
string[17] memory parts;
parts[0] = '<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMinYMin meet" viewBox="0 0 350 350"><style>.base { fill: white; font-family: serif; font-size: 14px; }</style><rect width="100%" height="100%" fill="black" /><text x="10" y="20" class="base">';
parts[1] = getMeleeAttack(tokenId);
parts[2] = '</text><text x="10" y="40" class="base">';
parts[3] = getRangeAttack(tokenId);
parts[4] = '</text><text x="10" y="60" class="base">';
parts[5] = getElementalSpell(tokenId);
parts[6] = '</text><text x="10" y="80" class="base">';
parts[7] = getSpiritualSpell(tokenId);
parts[8] = '</text><text x="10" y="100" class="base">';
parts[9] = getCurse(tokenId);
parts[10] = '</text><text x="10" y="120" class="base">';
parts[11] = getHeal(tokenId);
parts[12] = '</text><text x="10" y="140" class="base">';
parts[13] = getBuff(tokenId);
parts[14] = '</text><text x="10" y="160" class="base">';
parts[15] = getDefensiveSkill(tokenId);
parts[16] = '</text></svg>';
string memory output = string(abi.encodePacked(parts[0], parts[1], parts[2], parts[3], parts[4], parts[5], parts[6], parts[7], parts[8]));
output = string(abi.encodePacked(output, parts[9], parts[10], parts[11], parts[12], parts[13], parts[14], parts[15], parts[16]));
string memory json = Base64.encode(bytes(string(abi.encodePacked('{"name": "Set #', toString(tokenId), '", "description": "Skills are randomized adventurer abilities generated and stored on chain.", "image": "data:image/svg+xml;base64,', Base64.encode(bytes(output)), '"}'))));
output = string(abi.encodePacked('data:application/json;base64,', json));
return output;
}
}
constructor() ERC1155("Skills") Ownable() {}
}