Overview
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0 ETH
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$0.00More Info
Private Name Tags
ContractCreator
TokenTracker
Latest 25 from a total of 1,002 transactions
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Set Approval For... | 20070938 | 70 days ago | IN | 0 ETH | 0.00072343 | ||||
Set Approval For... | 19612094 | 135 days ago | IN | 0 ETH | 0.00178969 | ||||
Set Approval For... | 19530771 | 146 days ago | IN | 0 ETH | 0.00097957 | ||||
Transfer From | 19105492 | 206 days ago | IN | 0 ETH | 0.00082041 | ||||
Set Approval For... | 19086054 | 208 days ago | IN | 0 ETH | 0.00104132 | ||||
Set Approval For... | 18887548 | 236 days ago | IN | 0 ETH | 0.00176617 | ||||
Safe Transfer Fr... | 18851099 | 241 days ago | IN | 0 ETH | 0.00183951 | ||||
Transfer From | 18830090 | 244 days ago | IN | 0 ETH | 0.00273575 | ||||
Set Approval For... | 18803524 | 248 days ago | IN | 0 ETH | 0.00066015 | ||||
Set Approval For... | 18803523 | 248 days ago | IN | 0 ETH | 0.0006906 | ||||
Set Approval For... | 18803522 | 248 days ago | IN | 0 ETH | 0.00068952 | ||||
Set Approval For... | 18720587 | 260 days ago | IN | 0 ETH | 0.00158932 | ||||
Safe Transfer Fr... | 18655508 | 269 days ago | IN | 0 ETH | 0.00143936 | ||||
Set Approval For... | 18387047 | 306 days ago | IN | 0 ETH | 0.00056072 | ||||
Set Approval For... | 18382106 | 307 days ago | IN | 0 ETH | 0.00026651 | ||||
Set Approval For... | 18379728 | 307 days ago | IN | 0 ETH | 0.00053057 | ||||
Set Approval For... | 18379573 | 307 days ago | IN | 0 ETH | 0.00042783 | ||||
Set Approval For... | 18362319 | 310 days ago | IN | 0 ETH | 0.00028549 | ||||
Set Approval For... | 18361773 | 310 days ago | IN | 0 ETH | 0.00033213 | ||||
Set Approval For... | 18332056 | 314 days ago | IN | 0 ETH | 0.00024772 | ||||
Set Approval For... | 18245892 | 326 days ago | IN | 0 ETH | 0.00029402 | ||||
Set Approval For... | 18229729 | 328 days ago | IN | 0 ETH | 0.00053446 | ||||
Set Approval For... | 18186152 | 334 days ago | IN | 0 ETH | 0.00097265 | ||||
Set Approval For... | 18176992 | 336 days ago | IN | 0 ETH | 0.00056604 | ||||
Set Approval For... | 18164264 | 338 days ago | IN | 0 ETH | 0.00151578 |
Latest 1 internal transaction
Advanced mode:
Parent Transaction Hash | Block | From | To | |||
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15623654 | 694 days ago | 0.006 ETH |
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Contract Name:
OmegaComic
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
Yes with 10000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: Unlicensed pragma solidity 0.8.9; import '@openzeppelin/contracts/token/ERC721/ERC721.sol'; import '@openzeppelin/contracts/access/Ownable.sol'; import '@openzeppelin/contracts/interfaces/IERC2981.sol'; import '@openzeppelin/contracts/utils/cryptography/MerkleProof.sol'; /* ██▜█▟███████████████▜▛▙▛▛▛▟▜▟▞▛▛▛▛█▞▙▙█▜▜▜▙███████ ████████▜█▛█▙██▟█▟█▟▜▝▖▞▖▌▞▄▗▐▗▚▐▗▖▞▖▖▖▘▚▜▛██▜█▛██ █▛████▜▟████████▛█▟▜▗▚▛▙▛▛▙▜▜▚▛▙▛▙▜▜▟▜▚▚▜▜████████ ████▙████████▛▙██▜▞▚▐▚▛▟▝▀▞▀▞▀▞▚▀▞▜▚▙▀▖▟▜█▙███████ ███████████▜▟███▟▜▝▞▟▜▞▖▌▙▐▐▗▚▞▄▝▗▛▙▀▞▟▜█▙██▙█▙███ ██▟█▜█████▜████▟▜▘▚▛▙▛▖▄▝▖▞▖▚▖▄▗▚▛▟▚▚▟▟▛▙█████████ ██████▛██▟███▙█▞▚▐▜▟▙▜▜▟▛█▟▜▙▜▟▚▛▟▚▘▟▟▙████▛███▜▙█ █▙██████████▙█▟▝▄▜▙▙▜▜▛▙█▙▛▙▜▙▜▜▜▚▚▟▙█▟███████▟███ ████▜███▜█▜▟▙▙▘▞▟▙▚▌▚▘▜▜▟▙█▜▚▝▝▝▝▖▟▟▟▛███▜▟███████ ██▜███▟█████▟▝▐▟▚▙▀▖▙▜▗▜▟▟▙▛▙▝▜▜▛▛▙█▜███▟████▟████ ████████▛▙█▟▝▐▚▛▙▌▚▟▟▜▖▚▙▙▙█▟▐▐▜▟█████████████████ █▛██▛█▛▙██▙▘▞▙▜▞▌▞▟▟▟▜▟▗▚▙▚▙▚▙▗▜▙█▙██▛▙█████▜█▛▙██ █████████▙▚▘▞▗▘▚▘▟▟▟▙█▙▌▖▞▝▖▚▗▘▟▟▙██▙█████▜███████ ███▛█████▟█▜▟▛█▙█▛█▙█▙▛█▜▟▛█▜▙█▙██████████████████ */ contract OmegaComic is Ownable, ERC721, IERC2981 { /* -------------------------------------------------------------------------- */ /* Config */ /* -------------------------------------------------------------------------- */ /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. */ string public baseTokenURI; /** * @notice Max supply of tokens */ uint256 public immutable maxSupply; /** * @notice NFT royalties (ERC2981) * 10% = 1000 bps * (royaltyBps * _salePrice) / 10000 */ uint256 public royaltyBps; /** * @notice Royalty fee receiver address * this address will received royalty fee from second market sales */ address public royaltyReceiver; /** * @notice Merkle root hash used for whitelist mint */ bytes32 public merkleRoot; /** * @notice mapping between owner address -> flag if token is already claimed */ mapping(address => uint256) public tokensClaimedPerUser; /** * @notice current token id - this ID will be used for next minted token */ uint256 public currentTokenId = 1; /** * @notice Max tokens per user */ uint256 public constant MAX_TOKENS_PER_USER = 4; /** * @notice Max royalty(bps) allowed = 10% */ uint16 public constant MAX_ROYALTY_BPS_ALLOWED = 1000; /** * @notice Address that can execute claims up to the limit of the total supply */ address public whitelistedClaimer; /* -------------------------------------------------------------------------- */ /* EVENTS */ /* -------------------------------------------------------------------------- */ /** * @notice Emitted when royalty BPS is updated */ event RoyaltyBpsUpdated(uint256 royaltyBps); /** * @notice Emitted when new merkle root is set */ event MerkleRootUpdated(bytes32 newMerkleRoot); /** * @notice Emitted when new base url is set */ event BaseURIUpdated(string newBaseURI); /** * @notice Emitted royalty receiver is updated */ event RoyaltyReceiverUpdated(address newRoyaltyReceiver); /** * @notice Emitted when whitelisted claimer is updated */ event WhitelistedClaimerUpdated(address newWhitelistedClaimer); /* ---------------------------------------------------------------------------- */ /* ERRORS */ /* ---------------------------------------------------------------------------- */ /** * @notice thrown if tokens claimed + tokens to claim exceeds quantity user is allowed to claim */ error AlreadyClaimed(); /** * @notice thrown if combination of user address / number of tokens is not in merkle tree root */ error NotInWhitelist(); /** * @notice caller of contract is another contract */ error CallerIsContract(); /** * @notice thrown if address is 0x */ error AddressCannotBe0(); /** * @notice Max supply of tokens reached */ error MaxSupplyReached(); /** * @notice Invalid number of tokens to claim */ error InvalidNumberOfTokensToClaim(); /** * @notice Invalid number of claimed tokens */ error InvalidNumberOfClaimedTokens(); /** * @notice Royalty exceeds limit allowed */ error RoyaltyExceedsLimitAllowed(); /** * @notice User is not a whitelisted account */ error UserIsNotAWhitelistedAccount(); /* -------------------------------------------------------------------------- */ /* CONSTRUCTOR */ /* -------------------------------------------------------------------------- */ /** * @dev Initializes the Omega contract by * @param setMaxSupply - Max supply of tokens * @param initialName - Initial name of the token * @param initialSymbol - Initial symbol of the token * @param initialBaseTokenURI - Initial base URI of the token * @param initialRoyaltyBps - Initial royalty BPS of the token * @param initialRoyaltyReceiverAddress - Initial royalty receiver address of the token * @param initialMerkleRoot - Initial merkle root of the token * @param initialWhitelistedClaimer - Initial whitelisted claimer address */ constructor( uint256 setMaxSupply, string memory initialName, string memory initialSymbol, string memory initialBaseTokenURI, uint256 initialRoyaltyBps, address initialRoyaltyReceiverAddress, bytes32 initialMerkleRoot, address initialWhitelistedClaimer ) ERC721(initialName, initialSymbol) { if ( initialRoyaltyReceiverAddress == address(0) || initialWhitelistedClaimer == address(0) ) revert AddressCannotBe0(); if (initialRoyaltyBps > MAX_ROYALTY_BPS_ALLOWED) revert RoyaltyExceedsLimitAllowed(); maxSupply = setMaxSupply; baseTokenURI = initialBaseTokenURI; royaltyBps = initialRoyaltyBps; royaltyReceiver = initialRoyaltyReceiverAddress; merkleRoot = initialMerkleRoot; whitelistedClaimer = initialWhitelistedClaimer; } /* -------------------------------------------------------------------------- */ /* External functions */ /* -------------------------------------------------------------------------- */ /** * @notice Interface for the NFT Royalty Standard. * * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal * support for royalty payments across all NFT marketplaces and ecosystem participants. * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of * exchange. The royalty amount is denominated and should be payed in that same unit of exchange. * * @param salePrice Sale price of the token * @return receiver receiver address for royalty fee * @return royaltyAmount Royalty amount */ function royaltyInfo(uint256, uint256 salePrice) external view override returns (address receiver, uint256 royaltyAmount) { receiver = royaltyReceiver; royaltyAmount = (salePrice * royaltyBps) / 10_000; } /** * @notice Set new royalty bps settings * @param newRoyaltyBps New BPS settings (10% = 1000 bps) */ function setRoyaltyBps(uint256 newRoyaltyBps) external onlyOwner { if (newRoyaltyBps > MAX_ROYALTY_BPS_ALLOWED) revert RoyaltyExceedsLimitAllowed(); royaltyBps = newRoyaltyBps; emit RoyaltyBpsUpdated(newRoyaltyBps); } /** * @notice Set new merkle tree root for whitelist mint * @param newMerkleRoot new merkle root tree */ function setMerkleRoot(bytes32 newMerkleRoot) external onlyOwner { merkleRoot = newMerkleRoot; emit MerkleRootUpdated(newMerkleRoot); } /** * @notice helper function for exposing _baseURI() * @return base URI */ function baseURI() external view returns (string memory) { return _baseURI(); } /** * @notice Set new bse URI * @param newBaseURI New base URI */ function setBaseURI(string calldata newBaseURI) external onlyOwner { baseTokenURI = newBaseURI; emit BaseURIUpdated(newBaseURI); } /** * @notice Set new royalty receiver address * @param newRoyaltyReceiver New royalty receiver address */ function setRoyaltyReceiver(address newRoyaltyReceiver) external onlyOwner { if (newRoyaltyReceiver == address(0)) revert AddressCannotBe0(); royaltyReceiver = newRoyaltyReceiver; emit RoyaltyReceiverUpdated(newRoyaltyReceiver); } /** * @notice Set new whitelisted claimer address * @param newWhitelistedClaimer New whitelisted claimer address */ function setWhitelistedClaimer(address newWhitelistedClaimer) external onlyOwner { if (newWhitelistedClaimer == address(0)) revert AddressCannotBe0(); whitelistedClaimer = newWhitelistedClaimer; emit WhitelistedClaimerUpdated(newWhitelistedClaimer); } /** * @notice Claim function * @param merkleProof - merkle proof * @param numberOfTokensAllowedToClaim - the total number of tokens a user is allowed to claim * @param numberOfTokensToClaim - number of tokens to be redeemed */ function claim( bytes32[] calldata merkleProof, uint256 numberOfTokensAllowedToClaim, uint256 numberOfTokensToClaim ) external { if ( numberOfTokensAllowedToClaim < 1 || numberOfTokensAllowedToClaim > MAX_TOKENS_PER_USER ) revert InvalidNumberOfTokensToClaim(); if ( numberOfTokensToClaim < 1 || numberOfTokensToClaim > MAX_TOKENS_PER_USER ) revert InvalidNumberOfClaimedTokens(); if (currentTokenId + (numberOfTokensToClaim - 1) > maxSupply) revert MaxSupplyReached(); _checkWhitelistRequirements( merkleProof, numberOfTokensAllowedToClaim, numberOfTokensToClaim ); uint256 tokenId = currentTokenId; for (uint256 i = 0; i < numberOfTokensToClaim; i++) { _safeMint(msg.sender, tokenId); unchecked { tokenId += 1; } } currentTokenId = tokenId; tokensClaimedPerUser[msg.sender] += numberOfTokensToClaim; } /** * @notice Whitelisted claim function * @param quantity - number of tokens to be redeemed */ function claimWithWhitelistedAddress( uint256 quantity ) external { if (msg.sender != whitelistedClaimer) revert UserIsNotAWhitelistedAccount(); if (quantity < 1) revert InvalidNumberOfTokensToClaim(); uint256 tokenId = currentTokenId; if (tokenId + (quantity - 1) > maxSupply) revert MaxSupplyReached(); for (uint256 i = 0; i < quantity; i++) { _safeMint(msg.sender, tokenId); unchecked { tokenId += 1; } } currentTokenId = tokenId; tokensClaimedPerUser[msg.sender] += quantity; } /** * @notice Returns the Uniform Resource Identifier (URI) for `tokenId` token. * @param tokenId ID of token * @return uri for token */ function tokenURI(uint256 tokenId) public view override returns (string memory) { return super.tokenURI(tokenId); } /* -------------------------------------------------------------------------- */ /* Public functions */ /* -------------------------------------------------------------------------- */ /** * @notice Returns if contract supports interface */ function supportsInterface(bytes4 interfaceId) public view override(ERC721, IERC165) returns (bool) { return super.supportsInterface(interfaceId) || interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC2981).interfaceId; } /* -------------------------------------------------------------------------- */ /* Internal functions */ /* -------------------------------------------------------------------------- */ /** * @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 overridden in child contracts. */ function _baseURI() internal view override returns (string memory) { return baseTokenURI; } /* -------------------------------------------------------------------------- */ /* Private functions */ /* -------------------------------------------------------------------------- */ /** * @notice Check whitelist requirements * @param merkleProof - merkle proof * @param numberOfTokensAllowedToClaim - number of tokens a user is allowed to claim * @param numberOfTokensToClaim - number of tokens to redeem */ function _checkWhitelistRequirements( bytes32[] calldata merkleProof, uint256 numberOfTokensAllowedToClaim, uint256 numberOfTokensToClaim ) private view { bytes32 leaf = keccak256( abi.encodePacked(msg.sender, numberOfTokensAllowedToClaim) ); bool isValidLeaf = MerkleProof.verify(merkleProof, merkleRoot, leaf); if (!isValidLeaf) revert NotInWhitelist(); if ( tokensClaimedPerUser[msg.sender] + numberOfTokensToClaim > numberOfTokensAllowedToClaim ) revert AlreadyClaimed(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/ERC721.sol) pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.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 { 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) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @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: address zero is not a valid owner"); 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: invalid token ID"); 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) { _requireMinted(tokenId); 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 overridden 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 = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not token owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { _requireMinted(tokenId); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { 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: caller is not token 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: caller is not token owner nor approved"); _safeTransfer(from, to, tokenId, data); } /** * @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) { address owner = ERC721.ownerOf(tokenId); return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == 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); _afterTokenTransfer(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(uint256 tokenId) internal virtual { address owner = ERC721.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); _afterTokenTransfer(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(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits an {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits an {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Reverts if the `tokenId` has not been minted yet. */ function _requireMinted(uint256 tokenId) internal view virtual { require(_exists(tokenId), "ERC721: invalid token ID"); } /** * @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 { /// @solidity memory-safe-assembly 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 {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) 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() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions 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 { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol) pragma solidity ^0.8.0; import "../utils/introspection/IERC165.sol"; /** * @dev Interface for the NFT Royalty Standard. * * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal * support for royalty payments across all NFT marketplaces and ecosystem participants. * * _Available since v4.5._ */ interface IERC2981 is IERC165 { /** * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of * exchange. The royalty amount is denominated and should be paid in that same unit of exchange. */ function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/cryptography/MerkleProof.sol) pragma solidity ^0.8.0; /** * @dev These functions deal with verification of Merkle Tree proofs. * * The proofs can be generated using the JavaScript library * https://github.com/miguelmota/merkletreejs[merkletreejs]. * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled. * * See `test/utils/cryptography/MerkleProof.test.js` for some examples. * * WARNING: You should avoid using leaf values that are 64 bytes long prior to * hashing, or use a hash function other than keccak256 for hashing leaves. * This is because the concatenation of a sorted pair of internal nodes in * the merkle tree could be reinterpreted as a leaf value. */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify( bytes32[] memory proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProof(proof, leaf) == root; } /** * @dev Calldata version of {verify} * * _Available since v4.7._ */ function verifyCalldata( bytes32[] calldata proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProofCalldata(proof, leaf) == root; } /** * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt * hash matches the root of the tree. When processing the proof, the pairs * of leafs & pre-images are assumed to be sorted. * * _Available since v4.4._ */ function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { computedHash = _hashPair(computedHash, proof[i]); } return computedHash; } /** * @dev Calldata version of {processProof} * * _Available since v4.7._ */ function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { computedHash = _hashPair(computedHash, proof[i]); } return computedHash; } /** * @dev Returns true if the `leaves` can be proved to be a part of a Merkle tree defined by * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}. * * _Available since v4.7._ */ function multiProofVerify( bytes32[] memory proof, bool[] memory proofFlags, bytes32 root, bytes32[] memory leaves ) internal pure returns (bool) { return processMultiProof(proof, proofFlags, leaves) == root; } /** * @dev Calldata version of {multiProofVerify} * * _Available since v4.7._ */ function multiProofVerifyCalldata( bytes32[] calldata proof, bool[] calldata proofFlags, bytes32 root, bytes32[] memory leaves ) internal pure returns (bool) { return processMultiProofCalldata(proof, proofFlags, leaves) == root; } /** * @dev Returns the root of a tree reconstructed from `leaves` and the sibling nodes in `proof`, * consuming from one or the other at each step according to the instructions given by * `proofFlags`. * * _Available since v4.7._ */ function processMultiProof( bytes32[] memory proof, bool[] memory proofFlags, bytes32[] memory leaves ) internal pure returns (bytes32 merkleRoot) { // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of // the merkle tree. uint256 leavesLen = leaves.length; uint256 totalHashes = proofFlags.length; // Check proof validity. require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof"); // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop". bytes32[] memory hashes = new bytes32[](totalHashes); uint256 leafPos = 0; uint256 hashPos = 0; uint256 proofPos = 0; // At each step, we compute the next hash using two values: // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we // get the next hash. // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the // `proof` array. for (uint256 i = 0; i < totalHashes; i++) { bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++]; bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++]; hashes[i] = _hashPair(a, b); } if (totalHashes > 0) { return hashes[totalHashes - 1]; } else if (leavesLen > 0) { return leaves[0]; } else { return proof[0]; } } /** * @dev Calldata version of {processMultiProof} * * _Available since v4.7._ */ function processMultiProofCalldata( bytes32[] calldata proof, bool[] calldata proofFlags, bytes32[] memory leaves ) internal pure returns (bytes32 merkleRoot) { // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of // the merkle tree. uint256 leavesLen = leaves.length; uint256 totalHashes = proofFlags.length; // Check proof validity. require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof"); // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop". bytes32[] memory hashes = new bytes32[](totalHashes); uint256 leafPos = 0; uint256 hashPos = 0; uint256 proofPos = 0; // At each step, we compute the next hash using two values: // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we // get the next hash. // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the // `proof` array. for (uint256 i = 0; i < totalHashes; i++) { bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++]; bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++]; hashes[i] = _hashPair(a, b); } if (totalHashes > 0) { return hashes[totalHashes - 1]; } else if (leavesLen > 0) { return leaves[0]; } else { return proof[0]; } } function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) { return a < b ? _efficientHash(a, b) : _efficientHash(b, a); } function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) { /// @solidity memory-safe-assembly assembly { mstore(0x00, a) mstore(0x20, b) value := keccak256(0x00, 0x40) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol) 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`. * * 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; /** * @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 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 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 the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface 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 `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) 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 // OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @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 * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://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 /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // 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); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) 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 // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface 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); }
{ "optimizer": { "enabled": true, "runs": 10000, "details": { "yul": false } }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"uint256","name":"setMaxSupply","type":"uint256"},{"internalType":"string","name":"initialName","type":"string"},{"internalType":"string","name":"initialSymbol","type":"string"},{"internalType":"string","name":"initialBaseTokenURI","type":"string"},{"internalType":"uint256","name":"initialRoyaltyBps","type":"uint256"},{"internalType":"address","name":"initialRoyaltyReceiverAddress","type":"address"},{"internalType":"bytes32","name":"initialMerkleRoot","type":"bytes32"},{"internalType":"address","name":"initialWhitelistedClaimer","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AddressCannotBe0","type":"error"},{"inputs":[],"name":"AlreadyClaimed","type":"error"},{"inputs":[],"name":"CallerIsContract","type":"error"},{"inputs":[],"name":"InvalidNumberOfClaimedTokens","type":"error"},{"inputs":[],"name":"InvalidNumberOfTokensToClaim","type":"error"},{"inputs":[],"name":"MaxSupplyReached","type":"error"},{"inputs":[],"name":"NotInWhitelist","type":"error"},{"inputs":[],"name":"RoyaltyExceedsLimitAllowed","type":"error"},{"inputs":[],"name":"UserIsNotAWhitelistedAccount","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"newBaseURI","type":"string"}],"name":"BaseURIUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"newMerkleRoot","type":"bytes32"}],"name":"MerkleRootUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"royaltyBps","type":"uint256"}],"name":"RoyaltyBpsUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newRoyaltyReceiver","type":"address"}],"name":"RoyaltyReceiverUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newWhitelistedClaimer","type":"address"}],"name":"WhitelistedClaimerUpdated","type":"event"},{"inputs":[],"name":"MAX_ROYALTY_BPS_ALLOWED","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_TOKENS_PER_USER","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseTokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"merkleProof","type":"bytes32[]"},{"internalType":"uint256","name":"numberOfTokensAllowedToClaim","type":"uint256"},{"internalType":"uint256","name":"numberOfTokensToClaim","type":"uint256"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"quantity","type":"uint256"}],"name":"claimWithWhitelistedAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"currentTokenId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"addres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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : setMaxSupply (uint256): 1000
Arg [1] : initialName (string): Omega
Arg [2] : initialSymbol (string): 1ED
Arg [3] : initialBaseTokenURI (string): https://whav75az7wbtor4znoc4vnil3e6ush7q2bjxby24jbd6dbxtl56q.arweave.net/scFf9Bn9gzdHmWuFyrUL2T1JH_DQU3DjXEhH4YbzX30/
Arg [4] : initialRoyaltyBps (uint256): 750
Arg [5] : initialRoyaltyReceiverAddress (address): 0x3eB207f36EDF94f7F68e0C515a829FA6276Fc383
Arg [6] : initialMerkleRoot (bytes32): 0xf075f51ae780a43bf405d140ad5d83632a4bd1b163c8c0d4532ca6fa4d675564
Arg [7] : initialWhitelistedClaimer (address): 0x16EC4d8D8a503f427a40fE5F527df024E06D18e7
-----Encoded View---------------
17 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000003e8
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000100
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000140
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000180
Arg [4] : 00000000000000000000000000000000000000000000000000000000000002ee
Arg [5] : 0000000000000000000000003eb207f36edf94f7f68e0c515a829fa6276fc383
Arg [6] : f075f51ae780a43bf405d140ad5d83632a4bd1b163c8c0d4532ca6fa4d675564
Arg [7] : 00000000000000000000000016ec4d8d8a503f427a40fe5f527df024e06d18e7
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000005
Arg [9] : 4f6d656761000000000000000000000000000000000000000000000000000000
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [11] : 3145440000000000000000000000000000000000000000000000000000000000
Arg [12] : 0000000000000000000000000000000000000000000000000000000000000075
Arg [13] : 68747470733a2f2f776861763735617a377762746f72347a6e6f6334766e696c
Arg [14] : 336536757368377132626a78627932346a626436646278746c3536712e617277
Arg [15] : 656176652e6e65742f7363466639426e39677a64486d5775467972554c325431
Arg [16] : 4a485f44515533446a584568483459627a5833302f0000000000000000000000
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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.