Overview
ETH Balance
0 ETH
Eth Value
$0.00More Info
Private Name Tags
ContractCreator
Latest 25 from a total of 1,154 transactions
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Withdraw | 13866363 | 942 days ago | IN | 0 ETH | 0.00197891 | ||||
Mint To | 13863829 | 943 days ago | IN | 0 ETH | 0.01106712 | ||||
Mint To | 13863817 | 943 days ago | IN | 0 ETH | 0.00954731 | ||||
Mint To | 13863714 | 943 days ago | IN | 0 ETH | 0.02695813 | ||||
Mint To | 13863692 | 943 days ago | IN | 0 ETH | 0.02226026 | ||||
Mint To | 13863690 | 943 days ago | IN | 0 ETH | 0.01751887 | ||||
Mint To | 13863689 | 943 days ago | IN | 0 ETH | 0.01803259 | ||||
Mint To | 13863683 | 943 days ago | IN | 0 ETH | 0.02710849 | ||||
Mint To | 13863681 | 943 days ago | IN | 0 ETH | 0.021161 | ||||
Mint To | 13863679 | 943 days ago | IN | 0 ETH | 0.01325884 | ||||
Mint To | 13863676 | 943 days ago | IN | 0 ETH | 0.01740315 | ||||
Mint To | 13863674 | 943 days ago | IN | 0 ETH | 0.02075311 | ||||
Mint To | 13863672 | 943 days ago | IN | 0 ETH | 0.01424671 | ||||
Mint To | 13863671 | 943 days ago | IN | 0 ETH | 0.02254679 | ||||
Mint To | 13863670 | 943 days ago | IN | 0 ETH | 0.0236109 | ||||
Mint To | 13863669 | 943 days ago | IN | 0 ETH | 0.02260472 | ||||
Mint To | 13863668 | 943 days ago | IN | 0 ETH | 0.03184888 | ||||
Mint To | 13863664 | 943 days ago | IN | 0 ETH | 0.01264692 | ||||
Mint To | 13863663 | 943 days ago | IN | 0 ETH | 0.02161571 | ||||
Mint To | 13863662 | 943 days ago | IN | 0 ETH | 0.02268444 | ||||
Mint To | 13863660 | 943 days ago | IN | 0 ETH | 0.01329351 | ||||
Mint To | 13863659 | 943 days ago | IN | 0 ETH | 0.01891781 | ||||
Mint To | 13863657 | 943 days ago | IN | 0 ETH | 0.02011813 | ||||
Mint To | 13863655 | 943 days ago | IN | 0 ETH | 0.0136374 | ||||
Mint To | 13863653 | 943 days ago | IN | 0 ETH | 0.0200785 |
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Contract Name:
FirstDrop
Compiler Version
v0.8.10+commit.fc410830
Optimization Enabled:
Yes with 2000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; import "./QueensAndKingsAvatars.sol"; contract FirstDrop is Ownable { modifier callerIsUser() { require(tx.origin == msg.sender, "The caller is another contract"); _; } address public avatarContractAddress; address public signerAddress; address public sAddress; uint16 public sMintLimit = 300; uint16 public sMintedTokens = 0; uint16 public totalAvatars = 2000; uint256 public mintPrice = 0.423 ether; string public ipfsAvatars; mapping(uint16 => uint16) private tokenMatrix; mapping(address => uint8) public mintsPerUser; // DEBUG function setTotalAvatars(uint16 _totalAvatars) external onlyOwner { totalAvatars = _totalAvatars; } // ONLY OWNER /** * @dev Allows to withdraw the Ether in the contract */ function withdraw() external onlyOwner { payable(msg.sender).transfer(address(this).balance); } /** * @dev Sets the mint price */ function setMintPrice(uint256 _mintPrice) external onlyOwner { mintPrice = _mintPrice; } /** * @dev Sets the avatar contract address */ function setAvatarContractAddress(address _address) external onlyOwner { avatarContractAddress = _address; } /** * @dev Sets the address that generates the signatures for whitelisting */ function setSignerAddress(address _signerAddress) external onlyOwner { signerAddress = _signerAddress; } /** * @dev Sets the address that can call mintTo */ function setSAddress(address _sAddress) external onlyOwner { sAddress = _sAddress; } /** * @dev Sets how many mints can the sAddress do */ function setSMintLimit(uint16 _sMintLimit) external onlyOwner { sMintLimit = _sMintLimit; } function setIPFSAvatars(string memory _ipfsAvatars) external onlyOwner { ipfsAvatars = _ipfsAvatars; } // END ONLY OWNER /** * @dev Mint function */ function mint( uint8 _quantity, uint256 _fromTimestamp, uint256 _toTimestamp, uint8 _maxQuantity, bytes calldata _signature ) external payable callerIsUser { bytes32 messageHash = generateMessageHash(msg.sender, _fromTimestamp, _toTimestamp, _maxQuantity); address recoveredWallet = ECDSA.recover(messageHash, _signature); require(recoveredWallet == signerAddress, "Invalid signature for the caller"); require(block.timestamp >= _fromTimestamp, "Too early to mint"); require(block.timestamp <= _toTimestamp, "The signature has expired"); QueensAndKingsAvatars qakContract = QueensAndKingsAvatars(avatarContractAddress); uint16 tmpTotalSupply = qakContract.totalSupply(); uint256 tokensLeft = totalAvatars - tmpTotalSupply; require(tokensLeft > 0, "No tokens left to be minted"); if (_quantity + mintsPerUser[msg.sender] > _maxQuantity) { _quantity = _maxQuantity - mintsPerUser[msg.sender]; } if (_quantity > tokensLeft) { _quantity = uint8(tokensLeft); } uint256 totalMintPrice = mintPrice * _quantity; require(msg.value >= totalMintPrice, "Not enough Ether provided to mint"); if (msg.value > totalMintPrice) { payable(msg.sender).transfer(msg.value - totalMintPrice); } require(_quantity != 0, "Address mint limit reached"); mintsPerUser[msg.sender] += _quantity; for (uint16 i; i < _quantity; i++) { uint16 _tokenId = _getTokenToBeMinted(tmpTotalSupply); qakContract.mint(_tokenId, msg.sender); tmpTotalSupply++; } } /** * @dev mint to address */ function mintTo(address[] memory _addresses) external { require(msg.sender == sAddress, "Caller is not allowed to mint"); require(_addresses.length > 0, "At least one token should be minted"); require(sMintedTokens + _addresses.length <= sMintLimit, "Mint limit reached"); QueensAndKingsAvatars qakContract = QueensAndKingsAvatars(avatarContractAddress); uint16 tmpTotalSupply = qakContract.totalSupply(); sMintedTokens += uint16(_addresses.length); for (uint256 i; i < _addresses.length; i++) { qakContract.mint(_getTokenToBeMinted(tmpTotalSupply), _addresses[i]); tmpTotalSupply++; } } /** * @dev mint to address */ function mintToDev(address[] memory _addresses) external onlyOwner { require(_addresses.length > 0, "At least one token should be minted"); QueensAndKingsAvatars qakContract = QueensAndKingsAvatars(avatarContractAddress); uint16 tmpTotalSupply = qakContract.totalSupply(); uint256 tokensLeft = totalAvatars - tmpTotalSupply; require(tokensLeft > 0, "No tokens left to be minted"); for (uint256 i; i < _addresses.length; i++) { qakContract.mint(_getTokenToBeMinted(tmpTotalSupply), _addresses[i]); tmpTotalSupply++; } } /** * @dev gets the amount of available tokens left to be minted */ function getAvailableTokens() external view returns (uint16) { QueensAndKingsAvatars qakContract = QueensAndKingsAvatars(avatarContractAddress); return totalAvatars - qakContract.totalSupply(); } /** * @dev Generates the message hash for the given parameters */ function generateMessageHash( address _address, uint256 _fromTimestamp, uint256 _toTimestamp, uint8 _maxQuantity ) internal pure returns (bytes32) { return keccak256( abi.encodePacked( "\x19Ethereum Signed Message:\n85", _address, _fromTimestamp, _toTimestamp, _maxQuantity ) ); } /** * @dev Returns a random available token to be minted */ function _getTokenToBeMinted(uint16 _totalMintedTokens) private returns (uint16) { uint16 maxIndex = totalAvatars + sMintLimit - _totalMintedTokens; uint16 random = _getRandomNumber(maxIndex, _totalMintedTokens); uint16 tokenId = tokenMatrix[random]; if (tokenMatrix[random] == 0) { tokenId = random; } tokenMatrix[maxIndex - 1] == 0 ? tokenMatrix[random] = maxIndex - 1 : tokenMatrix[random] = tokenMatrix[ maxIndex - 1 ]; // IDs start from 1 instead of 0 return tokenId + 1; } /** * @dev Generates a pseudo-random number. */ function _getRandomNumber(uint16 _upper, uint16 _totalMintedTokens) private view returns (uint16) { uint16 random = uint16( uint256( keccak256( abi.encodePacked( _totalMintedTokens, blockhash(block.number - 1), block.coinbase, block.difficulty, msg.sender ) ) ) ); return (random % _upper); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract 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); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @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; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @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); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT 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); } } } }
// SPDX-License-Identifier: MIT 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; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // 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); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { // Check the signature length // - case 65: r,s,v signature (standard) // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._ if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else if (signature.length == 64) { bytes32 r; bytes32 vs; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } return tryRecover(hash, r, vs); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s; uint8 v; assembly { s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) v := add(shr(255, vs), 27) } return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } if (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT 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); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol"; import "@openzeppelin/contracts/utils/Address.sol"; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; import "./ProtectedMint.sol"; import "./IOpenSeaProxy.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, ProtectedMint { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) internal _owners; // Mapping owner address to token count mapping(address => uint16) internal _balances; // Mapping from token ID to approved address mapping(uint16 => address) internal _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) internal _operatorApprovals; // OpenSea's proxy registry address address proxyRegistryAddress; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, uint16(tokenId)); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[uint16(tokenId)]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { if (proxyRegistryAddress != address(0)) { ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress); if (address(proxyRegistry.proxies(owner)) == operator) { return true; } } return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Sets OpenSea's proxy registry address */ function setProxyRegistryAddress(address _proxyRegistryAddress) external onlyOwner { proxyRegistryAddress = _proxyRegistryAddress; } /** * @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. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint16 tokenId) internal virtual { address owner = ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), uint16(tokenId)); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint16 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ownerOf(tokenId), to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract OwnableDelegateProxy {} contract ProxyRegistry { mapping(address => OwnableDelegateProxy) public proxies; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; interface ITrait is IERC721 { function onTraitAddedToAvatar(uint16 _tokenId, uint16 _avatarId) external; function onAvatarTransfer( address _from, address _to, uint16 _tokenId ) external; function onTraitRemovedFromAvatar(uint16 _tokenId, address _owner) external; function traitToAvatar(uint16) external returns (uint16); function mint(uint256 _tokenId, address _to) external; function burn(uint16 _tokenId) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; abstract contract ProtectedMint is Ownable { address[] public minterAddresses; modifier onlyMinter() { bool isAllowed; for (uint256 i; i < minterAddresses.length; i++) { if (minterAddresses[i] == msg.sender) { isAllowed = true; break; } } require(isAllowed, "Minter: caller is not an allowed minter"); _; } /** * @dev Adds an address that is allowed to mint */ function addMinterAddress(address _minterAddress) external onlyOwner { minterAddresses.push(_minterAddress); } /** * @dev Removes */ function removeMinterAddress(address _minterAddress) external onlyOwner { for (uint256 i; i < minterAddresses.length; i++) { if (minterAddresses[i] != _minterAddress) { continue; } minterAddresses[i] = minterAddresses[minterAddresses.length - 1]; minterAddresses.pop(); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; import "./ERC721.sol"; import "./ITrait.sol"; contract QueensAndKingsAvatars is ERC721 { using Strings for uint256; modifier onlyAvatarOwner(uint256 _tokenId) { require(ownerOf(_tokenId) == msg.sender, "Caller is not the owner of the avatar"); _; } address public signerAddress; string public baseURI = "ipfs://HASH/"; uint16 public totalTokens = 6900; uint16 public totalSupply = 0; uint256 public latestExternalTokenId = totalTokens + 1; address[] public traitTypeToAddress; // TokenId => Trait => TraitId mapping(uint16 => mapping(uint8 => uint16)) public avatarTraits; mapping(uint16 => bool) public hasMintedTraits; mapping(uint256 => uint16) public externalToInternalMapping; mapping(uint16 => uint256) public internalToExternalMapping; mapping(uint16 => bool) public frozenAvatars; bool isFreezeAllowed; constructor() ERC721("Queens+KingsAvatars", "Q+KA") {} // ONLY OWNER /** * @dev Sets the address that generates the signatures for whitelisting */ function setSignerAddress(address _signerAddress) external onlyOwner { signerAddress = _signerAddress; } /** * @dev Sets the base URI for the API that provides the NFT data. */ function setBaseTokenURI(string memory _uri) external onlyOwner { baseURI = _uri; } /** * @dev Adds the contract address of a trait type */ function addTraitType(address _traitAddress) external onlyOwner { traitTypeToAddress.push(_traitAddress); } /** * @dev Adds the contract address of a trait type */ function resetTraitTypes() external onlyOwner { delete traitTypeToAddress; } function setFreezedAllowed(bool _isFreezeAllowed) external onlyOwner { isFreezeAllowed = _isFreezeAllowed; } // END ONLY OWNER // ONLY MINTER /** * @dev Mints a avatars */ function mint(uint16 _tokenId, address _to) external onlyMinter { require(_tokenId > 0 && _tokenId <= totalTokens, "Token ID cannot be 0"); require(totalSupply < totalTokens, "Cannot mint more avatars"); externalToInternalMapping[_tokenId] = _tokenId; internalToExternalMapping[_tokenId] = _tokenId; totalSupply++; _mint(_to, _tokenId); } // END ONLY MITNER // ONLY AVATAR OWNER /** * @dev Adds full traits to an avatar */ function setTraitsToAvatar(uint256 _tokenId, uint16[] memory _traits) external onlyAvatarOwner(_tokenId) { require(traitTypeToAddress.length == _traits.length, "Invalid amount of traits"); uint16 _iTokenId = getInternalMapping(_tokenId); require(hasMintedTraits[_iTokenId], "Can not modify avatar until original traits are minted"); require(!frozenAvatars[_iTokenId], "Can not change the traits of a frozen avatar"); bool regenerate; uint256[] memory traitsPreviousAvatar = new uint256[](_traits.length); uint256 regeneratePreviousAvatarCounter; for (uint8 i; i < _traits.length; i++) { if (_traits[i] == avatarTraits[_iTokenId][i]) { continue; } ITrait trait = ITrait(traitTypeToAddress[i]); require(_traits[i] == 0 || trait.ownerOf(_traits[i]) == msg.sender, "Caller is not the owner of the trait"); uint16 newTraitCurrentAvatarId = trait.traitToAvatar(_traits[i]); if (newTraitCurrentAvatarId != 0 && newTraitCurrentAvatarId != _iTokenId) { avatarTraits[newTraitCurrentAvatarId][i] = 0; traitsPreviousAvatar[regeneratePreviousAvatarCounter] = getExternalMapping(newTraitCurrentAvatarId); regeneratePreviousAvatarCounter++; } if (avatarTraits[_iTokenId][i] != 0) { regenerate = true; trait.onTraitRemovedFromAvatar(avatarTraits[_iTokenId][i], ownerOf(_tokenId)); } avatarTraits[_iTokenId][i] = _traits[i]; if (_traits[i] != 0) { trait.onTraitAddedToAvatar(_traits[i], _iTokenId); } } for (uint256 i; i < regeneratePreviousAvatarCounter; i++) { if (_exists(traitsPreviousAvatar[i])) { regenerateAvatar(traitsPreviousAvatar[i]); } } if (regenerate) { regenerateAvatar(_tokenId); } } /** * @dev mints the traits for a given avatar */ function mintTraits( uint16 _tokenId, uint16[] memory _traits, bytes calldata _signature ) external { require(ownerOf(_tokenId) == msg.sender, "Caller is not the owner of the avatar"); require(_tokenId <= totalTokens, "Invalid token Id"); require(!hasMintedTraits[_tokenId], "Traits already minted"); bytes32 messageHash = generateMessageHash(_tokenId, _traits); address recoveredWallet = ECDSA.recover(messageHash, _signature); require(recoveredWallet == signerAddress, "Invalid signature for the caller"); hasMintedTraits[_tokenId] = true; for (uint8 i; i < _traits.length; i++) { if (_traits[i] == 0) { continue; } ITrait trait = ITrait(traitTypeToAddress[i]); trait.mint(_traits[i], msg.sender); avatarTraits[_tokenId][i] = _traits[i]; trait.onTraitAddedToAvatar(_traits[i], _tokenId); } } function freeze(uint256 _tokenId) external { require(isFreezeAllowed, "Cannot freeze at this stage"); uint16 _iTokenId = getInternalMapping(_tokenId); require(ownerOf(_tokenId) == msg.sender, "Caller is not the owner of the avatar"); require(hasMintedTraits[_iTokenId], "Traits have not been minted"); require(!frozenAvatars[_iTokenId], "Avatar is already frozen"); frozenAvatars[_iTokenId] = true; for (uint8 i; i < traitTypeToAddress.length; i++) { if (avatarTraits[_iTokenId][i] == 0) { continue; } ITrait trait = ITrait(traitTypeToAddress[i]); trait.burn(avatarTraits[_iTokenId][i]); } } // END ONLY AVATAR OWNER // ONLY TRAIT CONTRACTS /** * @dev removes a single trait from an avatar * by it's contract type */ function removeTrait(uint16 _iTokenId) external { require(!frozenAvatars[_iTokenId], "Avatar is already frozen"); bool found; uint256 _tokenId = getExternalMapping(_iTokenId); for (uint8 i; i < traitTypeToAddress.length; i++) { if (traitTypeToAddress[i] == msg.sender) { avatarTraits[getInternalMapping(_tokenId)][i] = 0; found = true; break; } } require(found, "Caller is not allowed"); regenerateAvatar(_tokenId); } // END ONLY TRAIT CONTRACTS // CUSTOM ERC721 /** * @dev See {ERC721}. * * Calls avatarTransfer for all the traits that the avatar has * in order to emit the transfer event for all the traits */ function _transfer( address from, address to, uint256 tokenId ) internal override { require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); uint16 _iTokenId = getInternalMapping(tokenId); // Clear approvals from the previous owner _approve(address(0), uint16(tokenId)); _balances[from] -= 1; _balances[to] += 1; _owners[_iTokenId] = to; emit Transfer(from, to, tokenId); for (uint8 i; i < traitTypeToAddress.length; i++) { if (avatarTraits[_iTokenId][i] == 0) { continue; } ITrait traitContract = ITrait(traitTypeToAddress[i]); traitContract.onAvatarTransfer(from, to, avatarTraits[_iTokenId][i]); } } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { uint16 _iTokenId; if (tokenId > totalTokens) { _iTokenId = getInternalMapping(tokenId); } else { _iTokenId = uint16(tokenId); } address owner = _owners[_iTokenId]; require(owner != address(0), "ERC721 Avatar: owner query for nonexistent token"); return owner; } /** * @dev See {IRC721-_exists}. */ function _exists(uint256 tokenId) internal view override returns (bool) { uint16 _iTokenId = externalToInternalMapping[tokenId]; return _owners[_iTokenId] != address(0); } /** * @dev See {ERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[getInternalMapping(tokenId)]; } /** * @dev See {ERC721-_approve}. */ function _approve(address to, uint16 tokenId) internal virtual override { _tokenApprovals[getInternalMapping(tokenId)] = to; emit Approval(ownerOf(tokenId), to, tokenId); } // END CUSTOM ERC721 /** * @dev Returns the traits for the given token id */ function getAvatarTraits(uint256 _tokenId) external view returns (uint16[] memory) { require(_exists(_tokenId), "ERC721: operator query for nonexistent token"); uint16 _iTokenId = getInternalMapping(_tokenId); uint16[] memory traits = new uint16[](traitTypeToAddress.length); for (uint8 i; i < traitTypeToAddress.length; i++) { traits[i] = avatarTraits[_iTokenId][i]; } return traits; } // INTERNAL /** * @dev to avoid users receiving offers for their complete avatars, removing * the parts and accepting the offers; The NFT changes ID every time a part is removed * or replaced */ function regenerateAvatar(uint256 _tokenId) internal returns (uint256) { address _owner = ownerOf(_tokenId); emit Transfer(_owner, address(0), _tokenId); emit Transfer(address(0), _owner, latestExternalTokenId); uint16 _iTokenId = getInternalMapping(_tokenId); externalToInternalMapping[latestExternalTokenId] = _iTokenId; internalToExternalMapping[_iTokenId] = latestExternalTokenId; delete externalToInternalMapping[_tokenId]; latestExternalTokenId++; return latestExternalTokenId - 1; } /** * @dev returns the original id for the given avatar */ function getInternalMapping(uint256 _tokenId) internal view returns (uint16) { require(externalToInternalMapping[_tokenId] != 0, "getInternalMapping: Invalid mapping"); return externalToInternalMapping[_tokenId]; } /** 8 @dev returns the external id for the original given id */ function getExternalMapping(uint16 _iTokenId) internal view returns (uint256) { require(internalToExternalMapping[_iTokenId] != 0, "getExternalMapping: Invalid mapping"); return internalToExternalMapping[_iTokenId]; } /** * @dev See {ERC721}. */ function _baseURI() internal view override returns (string memory) { return baseURI; } /** * @dev Generate a message hash for the given parameters */ function generateMessageHash(uint256 _avatarId, uint16[] memory _traitIds) internal pure returns (bytes32) { uint256 signatureBytes = 32 + _traitIds.length * 32; return keccak256( abi.encodePacked("\x19Ethereum Signed Message:\n", signatureBytes.toString(), _avatarId, _traitIds) ); } }
{ "remappings": [], "optimizer": { "enabled": true, "runs": 2000 }, "evmVersion": "london", "libraries": {}, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"avatarContractAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAvailableTokens","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ipfsAvatars","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"_quantity","type":"uint8"},{"internalType":"uint256","name":"_fromTimestamp","type":"uint256"},{"internalType":"uint256","name":"_toTimestamp","type":"uint256"},{"internalType":"uint8","name":"_maxQuantity","type":"uint8"},{"internalType":"bytes","name":"_signature","type":"bytes"}],"name":"mint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"mintPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"_addresses","type":"address[]"}],"name":"mintTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_addresses","type":"address[]"}],"name":"mintToDev","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"mintsPerUser","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sMintLimit","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sMintedTokens","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_address","type":"address"}],"name":"setAvatarContractAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_ipfsAvatars","type":"string"}],"name":"setIPFSAvatars","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_mintPrice","type":"uint256"}],"name":"setMintPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_sAddress","type":"address"}],"name":"setSAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"_sMintLimit","type":"uint16"}],"name":"setSMintLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_signerAddress","type":"address"}],"name":"setSignerAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"_totalAvatars","type":"uint16"}],"name":"setTotalAvatars","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"signerAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAvatars","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.