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Minimal Proxy Contract for 0x8cb738e7448a0aea7f3df2bfcdef834ee56b101b
Contract Name:
TwoFiveSixProject
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT /* 222222222222222 555555555555555555 66666666 2:::::::::::::::22 5::::::::::::::::5 6::::::6 2::::::222222:::::2 5::::::::::::::::5 6::::::6 2222222 2:::::2 5:::::555555555555 6::::::6 2:::::2 5:::::5 6::::::6 2:::::2 5:::::5 6::::::6 2222::::2 5:::::5555555555 6::::::6 22222::::::22 5:::::::::::::::5 6::::::::66666 22::::::::222 555555555555:::::5 6::::::::::::::66 2:::::22222 5:::::56::::::66666:::::6 2:::::2 5:::::56:::::6 6:::::6 2:::::2 5555555 5:::::56:::::6 6:::::6 2:::::2 2222225::::::55555::::::56::::::66666::::::6 2::::::2222222:::::2 55:::::::::::::55 66:::::::::::::66 2::::::::::::::::::2 55:::::::::55 66:::::::::66 22222222222222222222 555555555 666666666 Using this contract? A shout out to @Mint256Art is appreciated! */ pragma solidity ^0.8.7; import "./helpers/OwnableUpgradeable.sol"; import "./helpers/ERC721EnumerableUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/utils/Base64Upgradeable.sol"; contract TwoFiveSixProject is ERC721EnumerableUpgradeable, OwnableUpgradeable { uint256[180] public memberShipFlags; uint256[4] public gmTokenFlags; string public baseURI; bool public memberSaleIsActive; bool public gmDaoSaleIsActive; bool public publicSaleIsActive; uint256 public maxPerTx; uint256 public twoFiveSixShare; mapping(uint256 => bytes32) public tokenIdToHash; mapping(address => bool) public projectProxy; mapping(address => bool) public addressToRegistryDisabled; struct Project { string name; string symbol; address payable artistAddress; address payable twoFiveSixFundsAddress; address artScriptAddress; address royaltyAddress; address owner; address twoFiveSixGenesisAddress; address gmTokenAddress; address proxyRegistryAddress; uint256 maxSupply; uint256 showCaseAmount; uint256 memberPrice; uint256 publicPrice; uint256 royalty; } Project internal project; function initProject( Project calldata p, uint256 _twoFiveSixShare, uint256 _maxPerTx ) public initializer { __ERC721_init(p.name, p.symbol); __Ownable_init(p.owner); project = p; maxPerTx = _maxPerTx; twoFiveSixShare = _twoFiveSixShare; } function tokenURI(uint256 _tokenId) public view override returns (string memory) { require(_exists(_tokenId), "Token not found"); return string( abi.encodePacked(baseURI, StringsUpgradeable.toString(_tokenId)) ); } function showCaseMint(uint256[] calldata the256ArtIds) public onlyOwner { uint256 count = the256ArtIds.length; uint256 totalSupply = _owners.length; require(totalSupply == 0, "Not first mint"); require(count == project.showCaseAmount, "Must mint all"); require(project.showCaseAmount % 2 == 0, "Must be even."); IERC721Upgradeable twoFiveSix = IERC721Upgradeable( project.twoFiveSixGenesisAddress ); for (uint256 i; i < count; i++) { require( twoFiveSix.ownerOf(the256ArtIds[i]) == _msgSender(), "Membership not owned" ); uint256 storedValue = getTokenIdForMembershipId(the256ArtIds[i]); bool unset = storedValue == 0; require(unset, "Membership already used"); } for (uint256 i; i < (project.showCaseAmount / 2); i++) { uint256 tokenId = totalSupply + i; uint256 tokenIdTwo = totalSupply + i + (project.showCaseAmount / 2); bytes32 hashOne = createHash(tokenId, msg.sender); tokenIdToHash[tokenId] = hashOne; _setTokenIdForMembershipId(the256ArtIds[i], tokenId); _mint(project.artistAddress, tokenId); bytes32 hashTwo = createHash(tokenIdTwo, msg.sender); tokenIdToHash[tokenIdTwo] = hashTwo; _setTokenIdForMembershipId( the256ArtIds[i + (project.showCaseAmount / 2)], tokenIdTwo ); _mint(project.twoFiveSixFundsAddress, tokenIdTwo); } } function memberMint(uint256[] calldata the256ArtIds, address a) public payable { uint256 totalSupply = _owners.length; uint256 count = the256ArtIds.length; require(memberSaleIsActive, "Member mint not active."); require(count > 0, "Mint at least one"); require(totalSupply + count < project.maxSupply, "Exceeds max supply."); require(count < maxPerTx, "Exceeds max per transaction."); require( count * project.memberPrice <= msg.value, "Invalid funds provided." ); require(msg.sender == tx.origin, "No contract minting"); IERC721Upgradeable twoFiveSix = IERC721Upgradeable( project.twoFiveSixGenesisAddress ); for (uint256 i; i < count; i++) { require( twoFiveSix.ownerOf(the256ArtIds[i]) == _msgSender(), "Membership not owned" ); uint256 tokenId = totalSupply + i; uint256 storedValue = getTokenIdForMembershipId(the256ArtIds[i]); bool unset = (storedValue == 0); require(unset, "Membership already used"); _setTokenIdForMembershipId(the256ArtIds[i], tokenId); bytes32 hashOne = createHash(tokenId, msg.sender); tokenIdToHash[tokenId] = hashOne; _mint(a, tokenId); } } function gmTokenMint(uint256[] calldata gmTokenIds, address a) public payable { uint256 totalSupply = _owners.length; uint256 count = gmTokenIds.length; require(gmDaoSaleIsActive, "GmToken mint not active."); require(count > 0, "Mint at least one"); require(totalSupply + count < project.maxSupply, "Exceeds max supply."); require(count < maxPerTx, "Exceeds max per transaction."); require( count * project.memberPrice <= msg.value, "Invalid funds provided." ); require(msg.sender == tx.origin, "No contract minting"); IERC721Upgradeable gmToken = IERC721Upgradeable(project.gmTokenAddress); for (uint256 i; i < count; i++) { require( gmToken.ownerOf(gmTokenIds[i]) == _msgSender(), "GmToken not owned" ); uint256 tokenId = totalSupply + i; bool isUsed = getGmTokenUsed(gmTokenIds[i]); require(!isUsed, "GmToken already used"); _setGmTokenUsed(gmTokenIds[i]); bytes32 hashOne = createHash(tokenId, msg.sender); tokenIdToHash[tokenId] = hashOne; _mint(a, tokenId); } } function publicMint(uint256 count, address a) public payable { uint256 totalSupply = _owners.length; require(publicSaleIsActive, "Public mint not active."); require(count > 0, "Mint at least one"); require(totalSupply + count < project.maxSupply, "Exceeds max supply."); require(count < maxPerTx, "Exceeds max per transaction."); require( count * project.publicPrice <= msg.value, "Invalid funds provided." ); require(msg.sender == tx.origin, "No contract minting"); for (uint256 i; i < count; i++) { uint256 tokenId = totalSupply + i; bytes32 hashOne = createHash(tokenId, msg.sender); tokenIdToHash[tokenId] = hashOne; _mint(a, tokenId); } } function createHash(uint256 tokenId, address sender) private view returns (bytes32) { return keccak256( abi.encodePacked( tokenId, sender, blockhash(block.number - 2), blockhash(block.number - 4), blockhash(block.number - 8) ) ); } function getHashFromTokenId(uint256 _id) public view returns (bytes32) { return tokenIdToHash[_id]; } function _setTokenIdForMembershipId(uint256 _membershipId, uint256 _tokenId) private { uint256 index = _membershipId / 23; uint256 bit = (_membershipId % 23) * 11; memberShipFlags[index] = (memberShipFlags[index] & ~(0x7FF << bit)) | (_tokenId << bit); } function _setGmTokenUsed(uint256 _gmTokenId) private { uint256 index = _gmTokenId / 256; uint256 bit = _gmTokenId % 256; gmTokenFlags[index] = gmTokenFlags[index] | (1 << bit); } function getTokenIdForMembershipId(uint256 _membershipId) public view returns (uint256) { uint256 index = _membershipId / 23; uint256 bit = (_membershipId % 23) * 11; uint256 storedValue = (memberShipFlags[index] >> bit) & 0x7FF; return storedValue; } function getMembershipIdForTokenId(uint256 tokenId) public view returns (uint256) { require(_exists(tokenId), "Token not found"); uint256[] memory allTokenIdsForMembershipIds = getAllTokenIdForMembershipId(); uint256 membershipId; for (uint256 i = 1; i < allTokenIdsForMembershipIds.length; i++) { if (allTokenIdsForMembershipIds[i] == tokenId) { membershipId = i; break; } } return membershipId; } function getGmTokenUsed(uint256 _gmTokenid) public view returns (bool) { uint256 index = _gmTokenid / 256; uint256 bit = _gmTokenid % 256; bool storedValue = ((gmTokenFlags[index] >> bit) & 1) > 0; return storedValue; } function getAllTokenIdForMembershipId() public view returns (uint256[] memory) { uint256[] memory res = new uint256[](4096); for (uint256 i = 0; i < 4096; i++) { res[i] = getTokenIdForMembershipId(i); } return res; } function setBaseURI(string memory _baseURI) public onlyOwner { baseURI = _baseURI; } function setProxyRegistryAddress(address _proxyRegistryAddress) external onlyOwner { project.proxyRegistryAddress = _proxyRegistryAddress; } function setArtistAddress(address payable _artistAddress) external onlyOwner { project.artistAddress = _artistAddress; } function setTwoFiveSixFundsAddress(address payable _twoFiveSixFundsAddress) external onlyOwner { project.twoFiveSixFundsAddress = _twoFiveSixFundsAddress; } function setRoyalty(uint256 _royalty) external onlyOwner { project.royalty = _royalty; } function setRoyaltyAddress(address payable _royaltyAddress) external onlyOwner { project.royaltyAddress = _royaltyAddress; } function setArtScriptAddress(address _artScriptAddress) external onlyOwner { project.artScriptAddress = _artScriptAddress; } function setTwoFiveSixGenesisAddress(address _twoFiveSixGenesisAddress) external onlyOwner { project.twoFiveSixGenesisAddress = _twoFiveSixGenesisAddress; } function setMemberSaleIsActive(bool isActive) external onlyOwner { memberSaleIsActive = isActive; } function setMemberPrice(uint256 _price) external onlyOwner { project.memberPrice = _price; } function setPublicPrice(uint256 _price) external onlyOwner { project.publicPrice = _price; } function artScriptAddress() external view returns (address) { return project.artScriptAddress; } function maxSupply() external view returns (uint256) { return project.maxSupply; } function memberPrice() external view returns (uint256) { return project.memberPrice; } function publicPrice() external view returns (uint256) { return project.publicPrice; } function setPublicSaleIsActive(bool isActive) public onlyOwner { publicSaleIsActive = isActive; } function setPresaleIsActive(bool isActive) public onlyOwner { memberSaleIsActive = isActive; gmDaoSaleIsActive = isActive; } function setGmDaoSaleIsActive(bool isActive) public onlyOwner { gmDaoSaleIsActive = isActive; } function withdraw() public onlyOwner { uint256 balance = address(this).balance; project.twoFiveSixFundsAddress.transfer( (balance / 10000) * twoFiveSixShare ); project.artistAddress.transfer( (balance / 10000) * (10000 - twoFiveSixShare) ); } function walletOfOwner(address _owner) public view returns (uint256[] memory) { uint256 tokenCount = balanceOf(_owner); if (tokenCount == 0) return new uint256[](0); uint256[] memory tokensId = new uint256[](tokenCount); for (uint256 i; i < tokenCount; i++) { tokensId[i] = tokenOfOwnerByIndex(_owner, i); } return tokensId; } function batchTransferFrom( address _from, address _to, uint256[] memory _tokenIds ) public { for (uint256 i = 0; i < _tokenIds.length; i++) { transferFrom(_from, _to, _tokenIds[i]); } } function batchSafeTransferFrom( address _from, address _to, uint256[] memory _tokenIds, bytes memory data_ ) public { for (uint256 i = 0; i < _tokenIds.length; i++) { safeTransferFrom(_from, _to, _tokenIds[i], data_); } } function isOwnerOf(address account, uint256[] calldata _tokenIds) external view returns (bool) { for (uint256 i; i < _tokenIds.length; ++i) { if (_owners[_tokenIds[i]] != account) return false; } return true; } function flipProxyState(address proxyAddress) external onlyOwner { projectProxy[proxyAddress] = !projectProxy[proxyAddress]; } function toggleRegistryAccess() public virtual { addressToRegistryDisabled[msg.sender] = !addressToRegistryDisabled[ msg.sender ]; } function isApprovedForAll(address owner, address spender) public view override returns (bool) { OpenSeaProxyRegistry proxyRegistry = OpenSeaProxyRegistry( project.proxyRegistryAddress ); if ( address(proxyRegistry.proxies(owner)) == spender && !addressToRegistryDisabled[owner] ) return true; return super.isApprovedForAll(owner, spender); } function _mint(address to, uint256 tokenId) internal virtual override { _owners.push(to); emit Transfer(address(0), to, tokenId); } function royaltyInfo(uint256, uint256 _salePrice) external view returns (address receiver, uint256 royaltyAmount) { return (project.royaltyAddress, (_salePrice * project.royalty) / 10000); } function toHex16(bytes16 data) internal pure returns (bytes32 result) { result = (bytes32(data) & 0xFFFFFFFFFFFFFFFF000000000000000000000000000000000000000000000000) | ((bytes32(data) & 0x0000000000000000FFFFFFFFFFFFFFFF00000000000000000000000000000000) >> 64); result = (result & 0xFFFFFFFF000000000000000000000000FFFFFFFF000000000000000000000000) | ((result & 0x00000000FFFFFFFF000000000000000000000000FFFFFFFF0000000000000000) >> 32); result = (result & 0xFFFF000000000000FFFF000000000000FFFF000000000000FFFF000000000000) | ((result & 0x0000FFFF000000000000FFFF000000000000FFFF000000000000FFFF00000000) >> 16); result = (result & 0xFF000000FF000000FF000000FF000000FF000000FF000000FF000000FF000000) | ((result & 0x00FF000000FF000000FF000000FF000000FF000000FF000000FF000000FF0000) >> 8); result = ((result & 0xF000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F000) >> 4) | ((result & 0x0F000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F00) >> 8); result = bytes32( 0x3030303030303030303030303030303030303030303030303030303030303030 + uint256(result) + (((uint256(result) + 0x0606060606060606060606060606060606060606060606060606060606060606) >> 4) & 0x0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F) * 7 ); } function toHex(bytes32 data) internal pure returns (string memory) { return string( abi.encodePacked( "0x", toHex16(bytes16(data)), toHex16(bytes16(data << 128)) ) ); } function getArtFromChain(uint256 tokenId) external view returns (string memory artwork) { require(_exists(tokenId), "Token not found"); uint256 membershipId = getMembershipIdForTokenId(tokenId); IArtScript artscript = IArtScript(project.artScriptAddress); return string( abi.encodePacked( "data:text/html;base64,", Base64Upgradeable.encode( abi.encodePacked( "<html><head><script>let inputData={'tokenId': ", StringsUpgradeable.toString(tokenId), ",'membershipId': ", StringsUpgradeable.toString(membershipId), ",'hash': '", toHex(getHashFromTokenId(tokenId)), "'}</script>", artscript.head(), "</head><body><script src='", artscript.externalLibrary(), "'></script>", "<script src='", artscript.twoFiveSixLibrary(), "'></script><script defer>", artscript.artScript(), "</script></body></html>" ) ) ) ); } } contract OwnableDelegateProxy {} contract OpenSeaProxyRegistry { mapping(address => OwnableDelegateProxy) public proxies; } interface IArtScript { function projectName() external pure returns (string memory); function artistName() external pure returns (string memory); function externalLibrary() external pure returns (string memory); function twoFiveSixLibrary() external pure returns (string memory); function license() external pure returns (string memory); function artScript() external pure returns (string memory); function head() external pure returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { address private _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init(address _ownerOnInit) internal onlyInitializing { __Ownable_init_unchained(_ownerOnInit); } function __Ownable_init_unchained(address _ownerOnInit) internal onlyInitializing { _transferOwnership(_ownerOnInit); } /** * @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 { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require( newOwner != address(0), "Ownable: new owner is the zero address" ); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "./ERC721Upgradeable.sol"; import "@openzeppelin/contracts-upgradeable/token/ERC721/extensions/IERC721EnumerableUpgradeable.sol"; /** * @dev This implements an optional extension of {ERC721} defined in the EIP that adds * enumerability of all the token ids in the contract as well as all token ids owned by each * account but rips out the core of the gas-wasting processing that comes from OpenZeppelin. */ abstract contract ERC721EnumerableUpgradeable is ERC721Upgradeable, IERC721EnumerableUpgradeable { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165Upgradeable, ERC721Upgradeable) returns (bool) { return interfaceId == type(IERC721EnumerableUpgradeable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _owners.length; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { require( index < _owners.length, "ERC721Enumerable: global index out of bounds" ); return index; } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256 tokenId) { require( index < balanceOf(owner), "ERC721Enumerable: owner index out of bounds" ); uint256 count; for (uint256 i; i < _owners.length; i++) { if (owner == _owners[i]) { if (count == index) return i; else count++; } } revert("ERC721Enumerable: owner index out of bounds"); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol) pragma solidity ^0.8.0; /** * @dev Provides a set of functions to operate with Base64 strings. * * _Available since v4.5._ */ library Base64Upgradeable { /** * @dev Base64 Encoding/Decoding Table */ string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; /** * @dev Converts a `bytes` to its Bytes64 `string` representation. */ function encode(bytes memory data) internal pure returns (string memory) { /** * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol */ if (data.length == 0) return ""; // Loads the table into memory string memory table = _TABLE; // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter // and split into 4 numbers of 6 bits. // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up // - `data.length + 2` -> Round up // - `/ 3` -> Number of 3-bytes chunks // - `4 *` -> 4 characters for each chunk string memory result = new string(4 * ((data.length + 2) / 3)); /// @solidity memory-safe-assembly assembly { // Prepare the lookup table (skip the first "length" byte) let tablePtr := add(table, 1) // Prepare result pointer, jump over length let resultPtr := add(result, 32) // Run over the input, 3 bytes at a time for { let dataPtr := data let endPtr := add(data, mload(data)) } lt(dataPtr, endPtr) { } { // Advance 3 bytes dataPtr := add(dataPtr, 3) let input := mload(dataPtr) // To write each character, shift the 3 bytes (18 bits) chunk // 4 times in blocks of 6 bits for each character (18, 12, 6, 0) // and apply logical AND with 0x3F which is the number of // the previous character in the ASCII table prior to the Base64 Table // The result is then added to the table to get the character to write, // and finally write it in the result pointer but with a left shift // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F)))) resultPtr := add(resultPtr, 1) // Advance } // When data `bytes` is not exactly 3 bytes long // it is padded with `=` characters at the end switch mod(mload(data), 3) case 1 { mstore8(sub(resultPtr, 1), 0x3d) mstore8(sub(resultPtr, 2), 0x3d) } case 2 { mstore8(sub(resultPtr, 1), 0x3d) } } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ``` * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original * initialization step. This is essential to configure modules that are added through upgrades and that require * initialization. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized < type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } }
// 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 AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [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 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 pragma solidity ^0.8.7; import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol"; import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721ReceiverUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/token/ERC721/extensions/IERC721MetadataUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol"; import "./Address.sol"; abstract contract ERC721Upgradeable is ContextUpgradeable, ERC165Upgradeable, IERC721Upgradeable, IERC721MetadataUpgradeable { using Address for address; using StringsUpgradeable for uint256; string private _name; string private _symbol; // Mapping from token ID to owner address address[] internal _owners; mapping(uint256 => address) private _tokenApprovals; mapping(address => mapping(address => bool)) private _operatorApprovals; function __ERC721_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC721_init_unchained(name_, symbol_); } function __ERC721_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) { return interfaceId == type(IERC721Upgradeable).interfaceId || interfaceId == type(IERC721MetadataUpgradeable).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" ); uint256 count; for (uint256 i; i < _owners.length; ++i) { if (owner == _owners[i]) ++count; } return count; } /** * @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 {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721Upgradeable.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, 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[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) { 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 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 tokenId < _owners.length && _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 = ERC721Upgradeable.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); _owners.push(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(uint256 tokenId) internal virtual { address owner = ERC721Upgradeable.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _owners[tokenId] = address(0); 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( ERC721Upgradeable.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), tokenId); _owners[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721Upgradeable.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 IERC721ReceiverUpgradeable(to).onERC721Received( _msgSender(), from, tokenId, _data ) returns (bytes4 retval) { return retval == IERC721ReceiverUpgradeable.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 // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; import "../IERC721Upgradeable.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721EnumerableUpgradeable is IERC721Upgradeable { /** * @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); /** * @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 // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165Upgradeable.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721Upgradeable is IERC165Upgradeable { /** * @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 IERC721ReceiverUpgradeable { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721Upgradeable.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721MetadataUpgradeable is IERC721Upgradeable { /** * @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/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library StringsUpgradeable { 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 "./IERC165Upgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable { function __ERC165_init() internal onlyInitializing { } function __ERC165_init_unchained() internal onlyInitializing { } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165Upgradeable).interfaceId; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.6; library Address { function isContract(address account) internal view returns (bool) { uint256 size; assembly { size := extcodesize(account) } return size > 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165Upgradeable { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
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Multichain Portfolio | 30 Chains
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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.