NFT
Overview
TokenID
2816
Total Transfers
-
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
CashCows
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 pragma solidity ^0.8.0; //------------------------------------------------------------------------------------------- // // /$$$$$$ /$$ /$$$$$$ // /$$__ $$ | $$ /$$__ $$ // | $$ \__/ /$$$$$$ /$$$$$$$| $$$$$$$ | $$ \__/ /$$$$$$ /$$ /$$ /$$ /$$$$$$$ // | $$ |____ $$ /$$_____/| $$__ $$ | $$ /$$__ $$| $$ | $$ | $$ /$$_____/ // | $$ /$$$$$$$| $$$$$$ | $$ \ $$ | $$ | $$ \ $$| $$ | $$ | $$| $$$$$$ // | $$ $$ /$$__ $$ \____ $$| $$ | $$ | $$ $$| $$ | $$| $$ | $$ | $$ \____ $$ // | $$$$$$/| $$$$$$$ /$$$$$$$/| $$ | $$ | $$$$$$/| $$$$$$/| $$$$$/$$$$/ /$$$$$$$/ // \______/ \_______/|_______/ |__/ |__/ \______/ \______/ \_____/\___/ |_______/ // //------------------------------------------------------------------------------------------- // // Moo. import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; import "./CashCowsAbstract.sol"; /** * @dev Specifics of the Cash Cows collection */ contract CashCows is ReentrancyGuard, CashCowsAbstract { // ============ Constants ============ //additional roles bytes32 private constant _MINTER_ROLE = keccak256("MINTER_ROLE"); //max amount that can be minted in this collection uint16 public constant MAX_SUPPLY = 7777; //the sale price per token uint256 public constant MINT_PRICE = 0.005 ether; //maximum amount that can be purchased per wallet in the public sale uint256 public constant MAX_PER_WALLET = 9; // ============ Storage ============ //mapping of address to amount minted mapping(address => uint256) public minted; //flag for if the mint is open to the public bool public mintOpened; //maximum amount free per wallet in the public sale uint256 public maxFreePerWallet = 1; // ============ Deploy ============ /** * @dev Sets the base token uri */ constructor( string memory preview, address admin ) CashCowsAbstract(preview, admin) {} // ============ Read Methods ============ /** * @dev Returns the token collection name. */ function name() external pure returns(string memory) { return "Cash Cows Crew"; } /** * @dev Returns the token collection symbol. */ function symbol() external pure returns(string memory) { return "MOO"; } // ============ Write Methods ============ /** * @dev Mints new tokens for the `recipient`. Its token ID will be * automatically assigned */ function mint(uint256 quantity) external payable nonReentrant { address recipient = _msgSender(); //no contracts sorry.. if (recipient.code.length > 0 //has the sale started? || !mintOpened //the quantity here plus the current amount already minted //should be less than the max purchase amount || (quantity + minted[recipient]) > MAX_PER_WALLET //the quantity being minted should not exceed the max supply || (super.totalSupply() + quantity) > MAX_SUPPLY ) revert InvalidCall(); //if there are still some free if (minted[recipient] < maxFreePerWallet) { //find out how much left is free uint256 freeLeft = maxFreePerWallet - minted[recipient]; //if some of the quantity still needs to be paid if (freeLeft < quantity // and what is sent is less than what needs to be paid && ((quantity - freeLeft) * MINT_PRICE) > msg.value ) revert InvalidCall(); //the value sent should be the price times quantity } else if ((quantity * MINT_PRICE) > msg.value) revert InvalidCall(); minted[recipient] += quantity; _safeMint(recipient, quantity); } /** * @dev Allows anyone to mint tokens that was approved by the owner */ function mint( uint256 quantity, uint256 maxMint, uint256 maxFree, bytes memory proof ) external payable nonReentrant { address recipient = _msgSender(); //free cannot be more than max if (maxMint < maxFree //the quantity here plus the current amount already minted //should be less than the max purchase amount || (quantity + minted[recipient]) > maxMint //the quantity being minted should not exceed the max supply || (super.totalSupply() + quantity) > MAX_SUPPLY //make sure the minter signed this off || !hasRole(_MINTER_ROLE, ECDSA.recover( ECDSA.toEthSignedMessageHash( keccak256(abi.encodePacked( "mint", recipient, maxMint, maxFree )) ), proof )) ) revert InvalidCall(); //if there are still some free if (minted[recipient] < maxFree) { //find out how much left is free uint256 freeLeft = maxFree - minted[recipient]; //if some of the quantity still needs to be paid if (freeLeft < quantity // and what is sent is less than what needs to be paid && ((quantity - freeLeft) * MINT_PRICE) > msg.value ) revert InvalidCall(); //the value sent should be the price times quantity } else if ((quantity * MINT_PRICE) > msg.value) revert InvalidCall(); minted[recipient] += quantity; _safeMint(recipient, quantity); } // ============ Admin Methods ============ /** * @dev Allows the _MINTER_ROLE to mint any to anyone (in the case of * a no sell out) */ function mint( address recipient, uint256 quantity ) external onlyRole(_MINTER_ROLE) nonReentrant { //the quantity being minted should not exceed the max supply if ((super.totalSupply() + quantity) > MAX_SUPPLY) revert InvalidCall(); _safeMint(recipient, quantity); } /** * @dev Starts the sale */ function openMint(bool yes) external onlyRole(_CURATOR_ROLE) { mintOpened = yes; } /** * @dev Allows the admin to change the public max free */ function setMaxFree(uint256 max) external onlyRole(_CURATOR_ROLE) { maxFreePerWallet = max; } /** * @dev Allows the proceeds to be withdrawn. This wont be allowed * until the metadata has been set to discourage rug pull */ function withdraw(address recipient) external onlyOwner nonReentrant { //cannot withdraw without setting a base URI first if (address(_metadata) == address(0)) revert InvalidCall(); payable(recipient).transfer(address(this).balance); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { // Check the signature length // - case 65: r,s,v signature (standard) // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._ if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else if (signature.length == 64) { bytes32 r; bytes32 vs; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } return tryRecover(hash, r, vs); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s; uint8 v; assembly { s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) v := add(shr(255, vs), 27) } return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } if (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol"; import "@openzeppelin/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "./ERC721BAbstract.sol"; import "./IMetadata.sol"; import "./IRoyaltySplitter.sol"; /** * @dev Adds access control, metadata, erc2981 and royalties, and * marketplace proxies. Opens set sontract URI */ abstract contract CashCowsAbstract is Ownable, AccessControl, ERC721BAbstract, IERC721Metadata { // ============ Constants ============ //roles bytes32 internal constant _DAO_ROLE = keccak256("DAO_ROLE"); bytes32 internal constant _CURATOR_ROLE = keccak256("CURATOR_ROLE"); bytes32 internal constant _APPROVED_ROLE = keccak256("APPROVED_ROLE"); //bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a bytes4 private constant _INTERFACE_ID_ERC2981 = 0x2a55205a; //immutable preview uri json string private _PREVIEW_URI; // ============ Storage ============ //the treasury where your money at. IRoyaltySplitter public treasury; //where 10000 == 100.00% uint256 public royaltyPercent = 1000; //the location of the metadata generator IMetadata internal _metadata; // ============ Deploy ============ /** * @dev Sets the base token uri */ constructor(string memory preview, address admin) { _setupRole(DEFAULT_ADMIN_ROLE, admin); _PREVIEW_URI = preview; } // ============ Read Methods ============ /** * @dev Override isApprovedForAll to whitelist marketplaces * to enable gas-less listings. */ function isApprovedForAll( address owner, address operator ) public view override(ERC721B, IERC721) returns(bool) { return hasRole(_APPROVED_ROLE, operator) || super.isApprovedForAll(owner, operator); } /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI( uint256 tokenId ) external view returns(string memory) { //if token does not exist if(!_exists(tokenId)) revert InvalidCall(); //if metadata is not set if (address(_metadata) == address(0)) return _PREVIEW_URI; return _metadata.tokenURI(tokenId); } // ============ Write Methods ============ /** * @dev ERC165 bytes to add to interface array - set in parent contract * implementing this standard */ function royaltyInfo( uint256 _tokenId, uint256 _salePrice ) external view returns ( address receiver, uint256 royaltyAmount ) { if (address(treasury) == address(0) || !_exists(_tokenId)) revert InvalidCall(); return ( payable(address(treasury)), (_salePrice * royaltyPercent) / 10000 ); } /** * @dev Adding support for ERC2981 */ function supportsInterface( bytes4 interfaceId ) public view override(AccessControl, ERC721B, IERC165) returns(bool) { //support ERC721 return interfaceId == type(IERC721Metadata).interfaceId //support ERC2981 || interfaceId == _INTERFACE_ID_ERC2981 //support other things || super.supportsInterface(interfaceId); } // ============ Admin Methods ============ /** * @dev Sets the contract URI */ function setURI(string memory uri) external onlyRole(_CURATOR_ROLE) { _setURI(uri); } /** * @dev Updates the metadata location */ function updateMetadata( IMetadata metadata ) external onlyRole(_CURATOR_ROLE) { _metadata = metadata; } /** * @dev Updates the royalty (provisions for Cow DAO) * where `percent` up to 1000 == 10.00% */ function updateRoyalty(uint256 percent) external onlyRole(_DAO_ROLE) { if (percent > 1000) revert InvalidCall(); royaltyPercent = percent; } /** * @dev Updates the treasury location, (in the case treasury needs to * be updated) */ function updateTreasury(IRoyaltySplitter splitter) external onlyRole(_CURATOR_ROLE) { treasury = splitter; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT // 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 v4.4.1 (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role, _msgSender()); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(uint160(account), 20), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (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 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); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "erc721b/contracts/ERC721B.sol"; /** * @dev Packages all the specific ERC721B features needed including * contract URI, burnable */ abstract contract ERC721BAbstract is ERC721B { // ============ Constants ============ //contract URI string private _CONTRACT_URI; // ============ Storage ============ //mapping of token id to who burned? mapping(uint256 => address) public burned; //count of how many burned uint256 private _totalBurned; // ============ Read Methods ============ /** * @dev Returns the contract URI. */ function contractURI() external view returns(string memory) { return _CONTRACT_URI; } /** * @dev Adds a provision for burnt tokens. */ function ownerOf( uint256 tokenId ) public view override returns(address) { //error if burned if (burned[tokenId] != address(0)) revert NonExistentToken(); return super.ownerOf(tokenId); } /** * @dev Returns all the owner's tokens. This is an incredibly * ineffecient method and should not be used by other contracts. * It's recommended to call this on your dApp then call `ownsAll` * from your other contract instead. */ function ownerTokens( address owner ) external view returns(uint256[] memory) { //get the balance uint256 balance = balanceOf(owner); //if no balance if (balance == 0) { //return empty array return new uint256[](0); } //this is how we can fix the array size uint256[] memory tokenIds = new uint256[](balance); //next get the total supply uint256 supply = totalSupply(); //next declare the array index uint256 index; //loop through the supply for (uint256 i = 1; i <= supply; i++) { //if we found a token owner ows if (owner == ownerOf(i)) { //add it to the token ids tokenIds[index++] = i; //if the index is equal to the balance if (index == balance) { //break out to save time break; } } } //finally return the token ids return tokenIds; } /** * @dev Returns true if `owner` owns all the `tokenIds` */ function ownsAll( address owner, uint256[] memory tokenIds ) external view returns(bool) { for (uint256 i = 0; i < tokenIds.length; i++) { if (owner != ownerOf(tokenIds[i])) { return false; } } return true; } /** * @dev Shows the overall amount of tokens generated in the contract */ function totalSupply() public view override returns(uint256) { return super.totalSupply() - _totalBurned; } // ============ Write Methods ============ /** * @dev Burns `tokenId`. See {ERC721B-_burn}. * * Requirements: * * - The caller must own `tokenId` or be an approved operator. */ function burn(uint256 tokenId) external { address owner = ERC721B.ownerOf(tokenId); if (!_isApprovedOrOwner(_msgSender(), tokenId, owner)) revert InvalidCall(); _beforeTokenTransfers(owner, address(0), tokenId, 1); // Clear approvals _approve(address(0), tokenId, owner); unchecked { //this is the situation when _owners are not normalized //get the next token id uint256 nextTokenId = tokenId + 1; //if token exists and yet it is address 0 if (_exists(nextTokenId) && _owners[nextTokenId] == address(0)) { _owners[nextTokenId] = owner; } //this is the situation when _owners are normalized burned[tokenId] = owner; _balances[owner] -= 1; _owners[tokenId] = address(0); _totalBurned++; } _afterTokenTransfers(owner, address(0), tokenId, 1); emit Transfer(owner, address(0), tokenId); } // ============ Internal Methods ============ /** * @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`). * * The parent defines `_exists` as greater than 0 and less than * the last token id */ function _exists( uint256 tokenId ) internal view virtual override returns(bool) { return burned[tokenId] == address(0) && super._exists(tokenId); } /** * @dev Sets the contract URI */ function _setURI(string memory uri) internal { _CONTRACT_URI = uri; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IMetadata { function tokenURI(uint256 tokenId) external view returns(string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; interface IRoyaltySplitter { function releaseable(uint256 tokenId) external view returns(uint256); function releaseable(IERC20 token, uint256 tokenId) external view returns(uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (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`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT // 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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// 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 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 pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol"; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; error InvalidCall(); error BalanceQueryZeroAddress(); error NonExistentToken(); error ApprovalToCurrentOwner(); error ApprovalOwnerIsOperator(); error NotERC721Receiver(); error ERC721ReceiverNotReceived(); /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] * Non-Fungible Token Standard, including the Metadata extension and * token Auto-ID generation. * * You must provide `name()` `symbol()` and `tokenURI(uint256 tokenId)` * to conform with IERC721Metadata */ abstract contract ERC721B is Context, ERC165, IERC721 { // ============ Storage ============ // The last token id minted uint256 private _lastTokenId; // Mapping from token ID to owner address mapping(uint256 => address) internal _owners; // Mapping owner address to token count mapping(address => uint256) internal _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; // ============ Read Methods ============ /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns(uint256) { if (owner == address(0)) revert BalanceQueryZeroAddress(); return _balances[owner]; } /** * @dev Shows the overall amount of tokens generated in the contract */ function totalSupply() public view virtual returns(uint256) { return _lastTokenId; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns(address) { unchecked { //this is the situation when _owners normalized uint256 id = tokenId; if (_owners[id] != address(0)) { return _owners[id]; } //this is the situation when _owners is not normalized if (id > 0 && id <= _lastTokenId) { //there will never be a case where token 1 is address(0) while(true) { id--; if (id == 0) { break; } else if (_owners[id] != address(0)) { return _owners[id]; } } } } revert NonExistentToken(); } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns(bool) { return interfaceId == type(IERC721).interfaceId || super.supportsInterface(interfaceId); } // ============ Approval Methods ============ /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721B.ownerOf(tokenId); if (to == owner) revert ApprovalToCurrentOwner(); address sender = _msgSender(); if (sender != owner && !isApprovedForAll(owner, sender)) revert ApprovalToCurrentOwner(); _approve(to, tokenId, owner); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns(address) { if (!_exists(tokenId)) revert NonExistentToken(); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId, address owner) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } /** * @dev transfers token considering approvals */ function _approveTransfer( address spender, address from, address to, uint256 tokenId ) internal virtual { if (!_isApprovedOrOwner(spender, tokenId, from)) revert InvalidCall(); _transfer(from, to, tokenId); } /** * @dev Safely transfers token considering approvals */ function _approveSafeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _approveTransfer(_msgSender(), from, to, tokenId); //see: @openzep/utils/Address.sol if (to.code.length > 0 && !_checkOnERC721Received(from, to, tokenId, _data) ) revert ERC721ReceiverNotReceived(); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner( address spender, uint256 tokenId, address owner ) internal view virtual returns(bool) { return spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits a {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { if (owner == operator) revert ApprovalOwnerIsOperator(); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } // ============ Mint Methods ============ /** * @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 amount, bytes memory _data, bool safeCheck ) private { if(amount == 0 || to == address(0)) revert InvalidCall(); uint256 startTokenId = _lastTokenId + 1; _beforeTokenTransfers(address(0), to, startTokenId, amount); unchecked { _lastTokenId += amount; _balances[to] += amount; _owners[startTokenId] = to; _afterTokenTransfers(address(0), to, startTokenId, amount); uint256 updatedIndex = startTokenId; uint256 endIndex = updatedIndex + amount; //if do safe check and, //check if contract one time (instead of loop) //see: @openzep/utils/Address.sol if (safeCheck && to.code.length > 0) { //loop emit transfer and received check do { emit Transfer(address(0), to, updatedIndex); if (!_checkOnERC721Received(address(0), to, updatedIndex++, _data)) revert ERC721ReceiverNotReceived(); } while (updatedIndex != endIndex); return; } do { emit Transfer(address(0), to, updatedIndex++); } while (updatedIndex != endIndex); } } /** * @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 amount) internal virtual { _safeMint(to, amount, ""); } /** * @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 amount, bytes memory _data ) internal virtual { _mint(to, amount, _data, true); } // ============ Transfer Methods ============ /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { _approveTransfer(_msgSender(), 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 { _approveSafeTransfer(from, to, tokenId, _data); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} * on a target address. The call is not executed if the target address * is not a contract. */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { 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 NotERC721Receiver(); } else { assembly { revert(add(32, reason), mload(reason)) } } } } /** * @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 > 0 && tokenId <= _lastTokenId; } /** * @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); //see: @openzep/utils/Address.sol if (to.code.length > 0 && !_checkOnERC721Received(from, to, tokenId, _data) ) revert ERC721ReceiverNotReceived(); } /** * @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) private { //if transfer to null or not the owner if (to == address(0) || from != ERC721B.ownerOf(tokenId)) revert InvalidCall(); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, from); unchecked { //this is the situation when _owners are normalized _balances[to] += 1; _balances[from] -= 1; _owners[tokenId] = to; //this is the situation when _owners are not normalized uint256 nextTokenId = tokenId + 1; if (nextTokenId <= _lastTokenId && _owners[nextTokenId] == address(0)) { _owners[nextTokenId] = from; } } _afterTokenTransfers(from, to, tokenId, 1); emit Transfer(from, to, tokenId); } // ============ TODO Methods ============ /** * @dev Hook that is called before a set of serially-ordered token ids * are about to be transferred. This includes minting. * * startTokenId - the first token id to be transferred * amount - the amount to be transferred * * 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`. */ function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 amount ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids * have been transferred. This includes minting. * * startTokenId - the first token id to be transferred * amount - the amount to be transferred * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (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 `IERC721.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/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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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)
0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000bf77342243b2f6dfb7a0b37793b0ffdeef669bb80000000000000000000000000000000000000000000000000000000000000035697066733a2f2f516d64546370414a4d384c6f554d7362435239695a78554d6e546b5769626574623541514d55686e3558515a55580000000000000000000000
-----Decoded View---------------
Arg [0] : preview (string): ipfs://QmdTcpAJM8LoUMsbCR9iZxUMnTkWibetb5AQMUhn5XQZUX
Arg [1] : admin (address): 0xbF77342243B2f6dfb7a0b37793b0ffdEeF669bb8
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [1] : 000000000000000000000000bf77342243b2f6dfb7a0b37793b0ffdeef669bb8
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000035
Arg [3] : 697066733a2f2f516d64546370414a4d384c6f554d7362435239695a78554d6e
Arg [4] : 546b5769626574623541514d55686e3558515a55580000000000000000000000
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