Contract Overview
Balance:
0 BTT
My Name Tag:
Not Available
Txn Hash | Method |
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To
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0x6e751c2c7334f1d8893b2bb7196bf2049e5361cc8963a6ca871566601edb2080 | 0x60806040 | 14842204 | 492 days 11 hrs ago | 0x31003c2d5685c7d28d7174c3255307eb9a0f3015 | IN | Create: Voucher | 0 BTT | 1,564.1331 |
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Contract Name:
Voucher
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @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 v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv( uint256 x, uint256 y, uint256 denominator, Rounding rounding ) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10**64) { value /= 10**64; result += 64; } if (value >= 10**32) { value /= 10**32; result += 32; } if (value >= 10**16) { value /= 10**16; result += 16; } if (value >= 10**8) { value /= 10**8; result += 8; } if (value >= 10**4) { value /= 10**4; result += 4; } if (value >= 10**2) { value /= 10**2; result += 2; } if (value >= 10**1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _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) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @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] = _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 pragma solidity ^0.8.0; import "@openzeppelin/contracts/utils/introspection/IERC165.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; /** * @title ERC-3525 Semi-Fungible Token Standard * @dev See https://eips.ethereum.org/EIPS/eip-3525 * Note: the ERC-165 identifier for this interface is 0xc97ae3d5. */ interface IERC3525 is IERC165, IERC721 { /** * @dev MUST emit when value of a token is transferred to another token with the same slot, * including zero value transfers (_value == 0) as well as transfers when tokens are created * (`_fromTokenId` == 0) or destroyed (`_toTokenId` == 0). * @param _fromTokenId The token id to transfer value from * @param _toTokenId The token id to transfer value to * @param _value The transferred value */ event TransferValue( uint256 indexed _fromTokenId, uint256 indexed _toTokenId, uint256 _value ); /** * @dev MUST emits when the approval value of a token is set or changed. * @param _tokenId The token to approve * @param _operator The operator to approve for * @param _value The maximum value that `_operator` is allowed to manage */ event ApprovalValue( uint256 indexed _tokenId, address indexed _operator, uint256 _value ); /** * @dev MUST emit when the slot of a token is set or changed. * @param _tokenId The token of which slot is set or changed * @param _oldSlot The previous slot of the token * @param _newSlot The updated slot of the token */ event SlotChanged( uint256 indexed _tokenId, uint256 indexed _oldSlot, uint256 indexed _newSlot ); /** * @notice Get the number of decimals the token uses for value - e.g. 6, means the user * representation of the value of a token can be calculated by dividing it by 1,000,000. * Considering the compatibility with third-party wallets, this function is defined as * `valueDecimals()` instead of `decimals()` to avoid conflict with ERC20 tokens. * @return The number of decimals for value */ function valueDecimals() external view returns (uint8); /** * @notice Get the value of a token. * @param _tokenId The token for which to query the balance * @return The value of `_tokenId` */ function balanceOf(uint256 _tokenId) external view returns (uint256); /** * @notice Get the slot of a token. * @param _tokenId The identifier for a token * @return The slot of the token */ function slotOf(uint256 _tokenId) external view returns (uint256); /** * @notice Allow an operator to manage the value of a token, up to the `_value` amount. * @dev MUST revert unless caller is the current owner, an authorized operator, or the approved * address for `_tokenId`. * MUST emit ApprovalValue event. * @param _tokenId The token to approve * @param _operator The operator to be approved * @param _value The maximum value of `_toTokenId` that `_operator` is allowed to manage */ function approve( uint256 _tokenId, address _operator, uint256 _value ) external; /** * @notice Get the maximum value of a token that an operator is allowed to manage. * @param _tokenId The token for which to query the allowance * @param _operator The address of an operator * @return The current approval value of `_tokenId` that `_operator` is allowed to manage */ function allowance( uint256 _tokenId, address _operator ) external view returns (uint256); /** * @notice Transfer value from a specified token to another specified token with the same slot. * @dev Caller MUST be the current owner, an authorized operator or an operator who has been * approved the whole `_fromTokenId` or part of it. * MUST revert if `_fromTokenId` or `_toTokenId` is zero token id or does not exist. * MUST revert if slots of `_fromTokenId` and `_toTokenId` do not match. * MUST revert if `_value` exceeds the balance of `_fromTokenId` or its allowance to the * operator. * MUST emit `TransferValue` event. * @param _fromTokenId The token to transfer value from * @param _toTokenId The token to transfer value to * @param _value The transferred value */ function transferFrom( uint256 _fromTokenId, uint256 _toTokenId, uint256 _value ) external; /** * @notice Transfer value from a specified token to an address. The caller should confirm that * `_to` is capable of receiving ERC3525 tokens. * @dev This function MUST create a new ERC3525 token with the same slot for `_to` to receive * the transferred value. * MUST revert if `_fromTokenId` is zero token id or does not exist. * MUST revert if `_to` is zero address. * MUST revert if `_value` exceeds the balance of `_fromTokenId` or its allowance to the * operator. * MUST emit `Transfer` and `TransferValue` events. * @param _fromTokenId The token to transfer value from * @param _to The address to transfer value to * @param _value The transferred value * @return ID of the new token created for `_to` which receives the transferred value */ function transferFrom( uint256 _fromTokenId, address _to, uint256 _value ) external returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol"; import "./IERC3525.sol"; /** * @title ERC-3525 Semi-Fungible Token Standard, optional extension for metadata * @dev Interfaces for any contract that wants to support query of the Uniform Resource Identifier * (URI) for the ERC3525 contract as well as a specified slot. * Because of the higher reliability of data stored in smart contracts compared to data stored in * centralized systems, it is recommended that metadata, including `contractURI`, `slotURI` and * `tokenURI`, be directly returned in JSON format, instead of being returned with a url pointing * to any resource stored in a centralized system. * See https://eips.ethereum.org/EIPS/eip-3525 * Note: the ERC-165 identifier for this interface is 0xe1600902. */ interface IERC3525Metadata is IERC3525, IERC721Metadata { /** * @notice Returns the Uniform Resource Identifier (URI) for the current ERC3525 contract. * @dev This function SHOULD return the URI for this contract in JSON format, starting with * header `data:application/json;`. * See https://eips.ethereum.org/EIPS/eip-3525 for the JSON schema for contract URI. * @return The JSON formatted URI of the current ERC3525 contract */ function contractURI() external view returns (string memory); /** * @notice Returns the Uniform Resource Identifier (URI) for the specified slot. * @dev This function SHOULD return the URI for `_slot` in JSON format, starting with header * `data:application/json;`. * See https://eips.ethereum.org/EIPS/eip-3525 for the JSON schema for slot URI. * @return The JSON formatted URI of `_slot` */ function slotURI(uint256 _slot) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IERC3525MetadataDescriptor { function constructContractURI() external view returns (string memory); function constructSlotURI( uint256 slot ) external view returns (string memory); function constructTokenURI( uint256 tokenId ) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title EIP-3525 token receiver interface * @dev Interface for a smart contract that wants to be informed by EIP-3525 contracts when * receiving values from ANY addresses or EIP-3525 tokens. * Note: the EIP-165 identifier for this interface is 0x009ce20b. */ interface IERC3525Receiver { /** * @notice Handle the receipt of an EIP-3525 token value. * @dev An EIP-3525 smart contract MUST check whether this function is implemented by the * recipient contract, if the recipient contract implements this function, the EIP-3525 * contract MUST call this function after a value transfer (i.e. `transferFrom(uint256, * uint256,uint256,bytes)`). * MUST return 0x009ce20b (i.e. `bytes4(keccak256('onERC3525Received(address,uint256,uint256, * uint256,bytes)'))`) if the transfer is accepted. * MUST revert or return any value other than 0x009ce20b if the transfer is rejected. * @param _operator The address which triggered the transfer * @param _fromTokenId The token id to transfer value from * @param _toTokenId The token id to transfer value to * @param _value The transferred value * @param _data Additional data with no specified format * @return `bytes4(keccak256('onERC3525Received(address,uint256,uint256,uint256,bytes)'))` * unless the transfer is rejected. */ function onERC3525Received( address _operator, uint256 _fromTokenId, uint256 _toTokenId, uint256 _value, bytes calldata _data ) external returns (bytes4); }
// SPDX-License-Identifier: None pragma solidity ^0.8.0; /** @title IManagement contract @dev Provide interfaces that allow interaction to Management contract */ interface IManagement { function treasury() external view returns (address); function hasRole( bytes32 role, address account ) external view returns (bool); function paymentTokens(address _token) external view returns (bool); function paused() external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/utils/Address.sol"; import "../interfaces/IERC3525.sol"; import "../interfaces/IERC3525Receiver.sol"; import "../interfaces/IERC3525Metadata.sol"; import "../interfaces/IERC3525MetadataDescriptor.sol"; contract ERC3525 is Context, IERC3525Metadata, IERC721Enumerable { using Strings for address; using Strings for uint256; using Address for address; event SetMetadataDescriptor(address indexed metadataDescriptor); struct TokenData { uint256 id; uint256 slot; uint256 balance; address owner; address approved; address[] valueApprovals; } struct AddressData { uint256[] ownedTokens; mapping(uint256 => uint256) ownedTokensIndex; mapping(address => bool) approvals; } string private _name; string private _symbol; uint8 private _decimals; mapping(uint256 => mapping(address => uint256)) private _approvedValues; TokenData[] private _allTokens; mapping(uint256 => uint256) private _allTokensIndex; mapping(address => AddressData) private _addressData; IERC3525MetadataDescriptor public metadataDescriptor; constructor(string memory name_, string memory symbol_, uint8 decimals_) { _name = name_; _symbol = symbol_; _decimals = decimals_; } function supportsInterface( bytes4 interfaceId ) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId || interfaceId == type(IERC3525).interfaceId || interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC3525Metadata).interfaceId || interfaceId == type(IERC721Enumerable).interfaceId || interfaceId == type(IERC721Metadata).interfaceId; } function name() public view virtual override returns (string memory) { return _name; } function symbol() public view virtual override returns (string memory) { return _symbol; } function valueDecimals() public view virtual override returns (uint8) { return _decimals; } function balanceOf( uint256 tokenId_ ) public view virtual override returns (uint256) { _requireMinted(tokenId_); return _allTokens[_allTokensIndex[tokenId_]].balance; } function ownerOf( uint256 tokenId_ ) public view virtual override returns (address owner_) { _requireMinted(tokenId_); owner_ = _allTokens[_allTokensIndex[tokenId_]].owner; require(owner_ != address(0), "ERC3525: invalid token ID"); } function slotOf( uint256 tokenId_ ) public view virtual override returns (uint256) { _requireMinted(tokenId_); return _allTokens[_allTokensIndex[tokenId_]].slot; } function _baseURI() internal view virtual returns (string memory) { return ""; } function contractURI() public view virtual override returns (string memory) { string memory baseURI = _baseURI(); return address(metadataDescriptor) != address(0) ? metadataDescriptor.constructContractURI() : bytes(baseURI).length > 0 ? string( abi.encodePacked( baseURI, "contract/", Strings.toHexString(address(this)) ) ) : ""; } function slotURI( uint256 slot_ ) public view virtual override returns (string memory) { string memory baseURI = _baseURI(); return address(metadataDescriptor) != address(0) ? metadataDescriptor.constructSlotURI(slot_) : bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, "slot/", slot_.toString())) : ""; } function tokenURI( uint256 tokenId_ ) public view virtual override returns (string memory) { _requireMinted(tokenId_); string memory baseURI = _baseURI(); return address(metadataDescriptor) != address(0) ? metadataDescriptor.constructTokenURI(tokenId_) : bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId_.toString())) : ""; } function approve( uint256 tokenId_, address to_, uint256 value_ ) public virtual override { address owner = ERC3525.ownerOf(tokenId_); require(to_ != owner, "ERC3525: approval to current owner"); require( _msgSender() == owner || ERC3525.isApprovedForAll(owner, _msgSender()), "ERC3525: approve caller is not owner nor approved for all" ); _approveValue(tokenId_, to_, value_); } function allowance( uint256 tokenId_, address operator_ ) public view virtual override returns (uint256) { _requireMinted(tokenId_); return _approvedValues[tokenId_][operator_]; } function transferFrom( uint256 fromTokenId_, address to_, uint256 value_ ) public virtual override returns (uint256) { _spendAllowance(_msgSender(), fromTokenId_, value_); uint256 newTokenId = _createDerivedTokenId(fromTokenId_); _mint(to_, newTokenId, ERC3525.slotOf(fromTokenId_), 0); _transferValue(fromTokenId_, newTokenId, value_); return newTokenId; } function transferFrom( uint256 fromTokenId_, uint256 toTokenId_, uint256 value_ ) public virtual override { _spendAllowance(_msgSender(), fromTokenId_, value_); _transferValue(fromTokenId_, toTokenId_, value_); } function balanceOf( address owner_ ) public view virtual override returns (uint256 balance) { require( owner_ != address(0), "ERC3525: balance query for the zero address" ); return _addressData[owner_].ownedTokens.length; } function transferFrom( address from_, address to_, uint256 tokenId_ ) public virtual override { require( _isApprovedOrOwner(_msgSender(), tokenId_), "ERC3525: transfer caller is not owner nor approved" ); _transferTokenId(from_, to_, tokenId_); } function safeTransferFrom( address from_, address to_, uint256 tokenId_, bytes memory data_ ) public virtual override { require( _isApprovedOrOwner(_msgSender(), tokenId_), "ERC3525: transfer caller is not owner nor approved" ); _safeTransferTokenId(from_, to_, tokenId_, data_); } function safeTransferFrom( address from_, address to_, uint256 tokenId_ ) public virtual override { safeTransferFrom(from_, to_, tokenId_, ""); } function approve(address to_, uint256 tokenId_) public virtual override { address owner = ERC3525.ownerOf(tokenId_); require(to_ != owner, "ERC3525: approval to current owner"); require( _msgSender() == owner || ERC3525.isApprovedForAll(owner, _msgSender()), "ERC3525: approve caller is not owner nor approved for all" ); _approve(to_, tokenId_); } function getApproved( uint256 tokenId_ ) public view virtual override returns (address) { _requireMinted(tokenId_); return _allTokens[_allTokensIndex[tokenId_]].approved; } function setApprovalForAll( address operator_, bool approved_ ) public virtual override { _setApprovalForAll(_msgSender(), operator_, approved_); } function isApprovedForAll( address owner_, address operator_ ) public view virtual override returns (bool) { return _addressData[owner_].approvals[operator_]; } function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } function tokenByIndex( uint256 index_ ) public view virtual override returns (uint256) { require( index_ < ERC3525.totalSupply(), "ERC3525: global index out of bounds" ); return _allTokens[index_].id; } function tokenOfOwnerByIndex( address owner_, uint256 index_ ) public view virtual override returns (uint256) { require( index_ < ERC3525.balanceOf(owner_), "ERC3525: owner index out of bounds" ); return _addressData[owner_].ownedTokens[index_]; } function _setApprovalForAll( address owner_, address operator_, bool approved_ ) internal virtual { require(owner_ != operator_, "ERC3525: approve to caller"); _addressData[owner_].approvals[operator_] = approved_; emit ApprovalForAll(owner_, operator_, approved_); } function _isApprovedOrOwner( address operator_, uint256 tokenId_ ) internal view virtual returns (bool) { _requireMinted(tokenId_); address owner = ERC3525.ownerOf(tokenId_); return (operator_ == owner || ERC3525.isApprovedForAll(owner, operator_) || ERC3525.getApproved(tokenId_) == operator_); } function _spendAllowance( address operator_, uint256 tokenId_, uint256 value_ ) internal virtual { uint256 currentAllowance = ERC3525.allowance(tokenId_, operator_); if ( !_isApprovedOrOwner(operator_, tokenId_) && currentAllowance != type(uint256).max ) { require( currentAllowance >= value_, "ERC3525: insufficient allowance" ); _approveValue(tokenId_, operator_, currentAllowance - value_); } } function _exists(uint256 tokenId_) internal view virtual returns (bool) { return _allTokens.length != 0 && _allTokens[_allTokensIndex[tokenId_]].id == tokenId_; } function _requireMinted(uint256 tokenId_) internal view virtual { require(_exists(tokenId_), "ERC3525: invalid token ID"); } function _mint( address to_, uint256 slot_, uint256 value_ ) internal virtual returns (uint256) { uint256 tokenId = _createOriginalTokenId(); _mint(to_, tokenId, slot_, value_); return tokenId; } function _mint( address to_, uint256 tokenId_, uint256 slot_, uint256 value_ ) internal virtual { require(to_ != address(0), "ERC3525: mint to the zero address"); require(tokenId_ != 0, "ERC3525: cannot mint zero tokenId"); require(!_exists(tokenId_), "ERC3525: token already minted"); _beforeValueTransfer(address(0), to_, 0, tokenId_, slot_, value_); __mintToken(to_, tokenId_, slot_); __mintValue(tokenId_, value_); _afterValueTransfer(address(0), to_, 0, tokenId_, slot_, value_); } function _mintValue(uint256 tokenId_, uint256 value_) internal virtual { _requireMinted(tokenId_); address owner = ERC3525.ownerOf(tokenId_); uint256 slot = ERC3525.slotOf(tokenId_); _beforeValueTransfer(address(0), owner, 0, tokenId_, slot, value_); __mintValue(tokenId_, value_); _afterValueTransfer(address(0), owner, 0, tokenId_, slot, value_); } function __mintValue(uint256 tokenId_, uint256 value_) private { _allTokens[_allTokensIndex[tokenId_]].balance += value_; emit TransferValue(0, tokenId_, value_); } function __mintToken(address to_, uint256 tokenId_, uint256 slot_) private { TokenData memory tokenData = TokenData({ id: tokenId_, slot: slot_, balance: 0, owner: to_, approved: address(0), valueApprovals: new address[](0) }); _addTokenToAllTokensEnumeration(tokenData); _addTokenToOwnerEnumeration(to_, tokenId_); emit Transfer(address(0), to_, tokenId_); emit SlotChanged(tokenId_, 0, slot_); } function _burn(uint256 tokenId_) internal virtual { _requireMinted(tokenId_); TokenData storage tokenData = _allTokens[_allTokensIndex[tokenId_]]; address owner = tokenData.owner; uint256 slot = tokenData.slot; uint256 value = tokenData.balance; _beforeValueTransfer(owner, address(0), tokenId_, 0, slot, value); _clearApprovedValues(tokenId_); _removeTokenFromOwnerEnumeration(owner, tokenId_); _removeTokenFromAllTokensEnumeration(tokenId_); emit TransferValue(tokenId_, 0, value); emit SlotChanged(tokenId_, slot, 0); emit Transfer(owner, address(0), tokenId_); _afterValueTransfer(owner, address(0), tokenId_, 0, slot, value); } function _burnValue(uint256 tokenId_, uint256 burnValue_) internal virtual { _requireMinted(tokenId_); TokenData storage tokenData = _allTokens[_allTokensIndex[tokenId_]]; address owner = tokenData.owner; uint256 slot = tokenData.slot; uint256 value = tokenData.balance; require(value >= burnValue_, "ERC3525: burn value exceeds balance"); _beforeValueTransfer(owner, address(0), tokenId_, 0, slot, burnValue_); tokenData.balance -= burnValue_; emit TransferValue(tokenId_, 0, burnValue_); _afterValueTransfer(owner, address(0), tokenId_, 0, slot, burnValue_); } function _addTokenToOwnerEnumeration( address to_, uint256 tokenId_ ) private { _allTokens[_allTokensIndex[tokenId_]].owner = to_; _addressData[to_].ownedTokensIndex[tokenId_] = _addressData[to_] .ownedTokens .length; _addressData[to_].ownedTokens.push(tokenId_); } function _removeTokenFromOwnerEnumeration( address from_, uint256 tokenId_ ) private { _allTokens[_allTokensIndex[tokenId_]].owner = address(0); AddressData storage ownerData = _addressData[from_]; uint256 lastTokenIndex = ownerData.ownedTokens.length - 1; uint256 lastTokenId = ownerData.ownedTokens[lastTokenIndex]; uint256 tokenIndex = ownerData.ownedTokensIndex[tokenId_]; ownerData.ownedTokens[tokenIndex] = lastTokenId; ownerData.ownedTokensIndex[lastTokenId] = tokenIndex; delete ownerData.ownedTokensIndex[tokenId_]; ownerData.ownedTokens.pop(); } function _addTokenToAllTokensEnumeration( TokenData memory tokenData_ ) private { _allTokensIndex[tokenData_.id] = _allTokens.length; _allTokens.push(tokenData_); } function _removeTokenFromAllTokensEnumeration(uint256 tokenId_) private { uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId_]; TokenData memory lastTokenData = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenData; _allTokensIndex[lastTokenData.id] = tokenIndex; delete _allTokensIndex[tokenId_]; _allTokens.pop(); } function _approve(address to_, uint256 tokenId_) internal virtual { _allTokens[_allTokensIndex[tokenId_]].approved = to_; emit Approval(ERC3525.ownerOf(tokenId_), to_, tokenId_); } function _approveValue( uint256 tokenId_, address to_, uint256 value_ ) internal virtual { require( to_ != address(0), "ERC3525: approve value to the zero address" ); if (!_existApproveValue(to_, tokenId_)) { _allTokens[_allTokensIndex[tokenId_]].valueApprovals.push(to_); } _approvedValues[tokenId_][to_] = value_; emit ApprovalValue(tokenId_, to_, value_); } function _clearApprovedValues(uint256 tokenId_) internal virtual { TokenData storage tokenData = _allTokens[_allTokensIndex[tokenId_]]; uint256 length = tokenData.valueApprovals.length; for (uint256 i = 0; i < length; i++) { address approval = tokenData.valueApprovals[i]; delete _approvedValues[tokenId_][approval]; } } function _existApproveValue( address to_, uint256 tokenId_ ) internal view virtual returns (bool) { uint256 length = _allTokens[_allTokensIndex[tokenId_]] .valueApprovals .length; for (uint256 i = 0; i < length; i++) { if ( _allTokens[_allTokensIndex[tokenId_]].valueApprovals[i] == to_ ) { return true; } } return false; } function _transferValue( uint256 fromTokenId_, uint256 toTokenId_, uint256 value_ ) internal virtual { require( _exists(fromTokenId_), "ERC3525: transfer from invalid token ID" ); require(_exists(toTokenId_), "ERC3525: transfer to invalid token ID"); TokenData storage fromTokenData = _allTokens[ _allTokensIndex[fromTokenId_] ]; TokenData storage toTokenData = _allTokens[_allTokensIndex[toTokenId_]]; require( fromTokenData.balance >= value_, "ERC3525: insufficient balance for transfer" ); require( fromTokenData.slot == toTokenData.slot, "ERC3525: transfer to token with different slot" ); _beforeValueTransfer( fromTokenData.owner, toTokenData.owner, fromTokenId_, toTokenId_, fromTokenData.slot, value_ ); fromTokenData.balance -= value_; toTokenData.balance += value_; emit TransferValue(fromTokenId_, toTokenId_, value_); _afterValueTransfer( fromTokenData.owner, toTokenData.owner, fromTokenId_, toTokenId_, fromTokenData.slot, value_ ); require( _checkOnERC3525Received(fromTokenId_, toTokenId_, value_, ""), "ERC3525: transfer to non ERC3525Receiver" ); } function _transferTokenId( address from_, address to_, uint256 tokenId_ ) internal virtual { require( ERC3525.ownerOf(tokenId_) == from_, "ERC3525: transfer from invalid owner" ); require(to_ != address(0), "ERC3525: transfer to the zero address"); uint256 slot = ERC3525.slotOf(tokenId_); uint256 value = ERC3525.balanceOf(tokenId_); _beforeValueTransfer(from_, to_, tokenId_, tokenId_, slot, value); _approve(address(0), tokenId_); _clearApprovedValues(tokenId_); _removeTokenFromOwnerEnumeration(from_, tokenId_); _addTokenToOwnerEnumeration(to_, tokenId_); emit Transfer(from_, to_, tokenId_); _afterValueTransfer(from_, to_, tokenId_, tokenId_, slot, value); } function _safeTransferTokenId( address from_, address to_, uint256 tokenId_, bytes memory data_ ) internal virtual { _transferTokenId(from_, to_, tokenId_); require( _checkOnERC721Received(from_, to_, tokenId_, data_), "ERC3525: transfer to non ERC721Receiver" ); } function _checkOnERC3525Received( uint256 fromTokenId_, uint256 toTokenId_, uint256 value_, bytes memory data_ ) private returns (bool) { address to = ERC3525.ownerOf(toTokenId_); if ( to.isContract() && IERC165(to).supportsInterface(type(IERC3525Receiver).interfaceId) ) { try IERC3525Receiver(to).onERC3525Received( _msgSender(), fromTokenId_, toTokenId_, value_, data_ ) returns (bytes4 retval) { return retval == IERC3525Receiver.onERC3525Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC3525: transfer to non ERC3525Receiver"); } else { // solhint-disable-next-line assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } function _checkOnERC721Received( address from_, address to_, uint256 tokenId_, bytes memory data_ ) private returns (bool) { if ( to_.isContract() && IERC165(to_).supportsInterface(type(IERC721Receiver).interfaceId) ) { try IERC721Receiver(to_).onERC721Received( _msgSender(), from_, tokenId_, data_ ) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver"); } else { // solhint-disable-next-line assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /* solhint-disable */ function _beforeValueTransfer( address from_, address to_, uint256 fromTokenId_, uint256 toTokenId_, uint256 slot_, uint256 value_ ) internal virtual {} function _afterValueTransfer( address from_, address to_, uint256 fromTokenId_, uint256 toTokenId_, uint256 slot_, uint256 value_ ) internal virtual {} /* solhint-enable */ function _setMetadataDescriptor( address metadataDescriptor_ ) internal virtual { metadataDescriptor = IERC3525MetadataDescriptor(metadataDescriptor_); emit SetMetadataDescriptor(metadataDescriptor_); } function _createOriginalTokenId() internal virtual returns (uint256) { return _createDefaultTokenId(); } function _createDerivedTokenId( uint256 fromTokenId_ ) internal virtual returns (uint256) { fromTokenId_; return _createDefaultTokenId(); } function _createDefaultTokenId() private view returns (uint256) { return ERC3525.totalSupply() + 1; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./interfaces/IManagement.sol"; import "./utils/ERC3525.sol"; contract Voucher is ERC3525 { bytes32 private constant MANAGER_ROLE = keccak256("MANAGER_ROLE"); bytes32 private constant MINTER_ROLE = keccak256("MINTER_ROLE"); IManagement public management; // TokenURI = baseURI + tokenId.toString() string private baseURI_; event Issue( address indexed to, uint256 indexed ticketId, uint256 indexed typeOf, uint256 value ); event UpdateValue( uint256 indexed ticketId, uint256 indexed oValue, uint256 indexed nValue ); modifier onlyManager() { require(management.hasRole(MANAGER_ROLE, _msgSender()), "Only Manager"); _; } modifier onlyMinter() { require(management.hasRole(MINTER_ROLE, _msgSender()), "Only Minter"); _; } modifier onPaused() { require(!management.paused(), "On Paused"); _; } constructor( IManagement _management, string memory name_, string memory symbol_, string memory _uri, uint8 decimals_ ) ERC3525(name_, symbol_, decimals_) { management = _management; baseURI_ = _uri; } function updateBaseURI(string calldata _uri) external onlyManager { baseURI_ = _uri; } function issue( address _account, uint256 _ticketId, uint256 _type, uint256 _value ) external onlyMinter { _mint(_account, _ticketId, _type, _value); emit Issue(_account, _ticketId, _type, _value); } function updateValue( uint256 _ticketId, uint256 _value, bool _isAdded ) external onlyMinter { uint256 _oValue = balanceOf(_ticketId); if (_isAdded) _mintValue(_ticketId, _value); else _burnValue(_ticketId, _value); uint256 _nValue = balanceOf(_ticketId); emit UpdateValue(_ticketId, _oValue, _nValue); } function _baseURI() internal view override returns (string memory) { return baseURI_; } function _beforeValueTransfer( address _from, address _to, uint256 _fromTokenId, uint256 _toTokenId, uint256 _slot, uint256 _value ) internal override onPaused { super._beforeValueTransfer( _from, _to, _fromTokenId, _toTokenId, _slot, _value ); } }
{ "optimizer": { "enabled": false, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
[{"inputs":[{"internalType":"contract IManagement","name":"_management","type":"address"},{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"string","name":"_uri","type":"string"},{"internalType":"uint8","name":"decimals_","type":"uint8"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_tokenId","type":"uint256"},{"indexed":true,"internalType":"address","name":"_operator","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"ApprovalValue","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"ticketId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"typeOf","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Issue","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"metadataDescriptor","type":"address"}],"name":"SetMetadataDescriptor","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_tokenId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"_oldSlot","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"_newSlot","type":"uint256"}],"name":"SlotChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_fromTokenId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"_toTokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"TransferValue","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"ticketId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"oValue","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"nValue","type":"uint256"}],"name":"UpdateValue","type":"event"},{"inputs":[{"internalType":"uint256","name":"tokenId_","type":"uint256"},{"internalType":"address","name":"operator_","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to_","type":"address"},{"internalType":"uint256","name":"tokenId_","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId_","type":"uint256"},{"internalType":"address","name":"to_","type":"address"},{"internalType":"uint256","name":"value_","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId_","type":"uint256"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contractURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId_","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"},{"internalType":"address","name":"operator_","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"},{"internalType":"uint256","name":"_ticketId","type":"uint256"},{"internalType":"uint256","name":"_type","type":"uint256"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"issue","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"management","outputs":[{"internalType":"contract IManagement","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"metadataDescriptor","outputs":[{"internalType":"contract IERC3525MetadataDescriptor","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId_","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"owner_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from_","type":"address"},{"internalType":"address","name":"to_","type":"address"},{"internalType":"uint256","name":"tokenId_","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from_","type":"address"},{"internalType":"address","name":"to_","type":"address"},{"internalType":"uint256","name":"tokenId_","type":"uint256"},{"internalType":"bytes","name":"data_","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator_","type":"address"},{"internalType":"bool","name":"approved_","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId_","type":"uint256"}],"name":"slotOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"slot_","type":"uint256"}],"name":"slotURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index_","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"},{"internalType":"uint256","name":"index_","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId_","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"fromTokenId_","type":"uint256"},{"internalType":"address","name":"to_","type":"address"},{"internalType":"uint256","name":"value_","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from_","type":"address"},{"internalType":"address","name":"to_","type":"address"},{"internalType":"uint256","name":"tokenId_","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"fromTokenId_","type":"uint256"},{"internalType":"uint256","name":"toTokenId_","type":"uint256"},{"internalType":"uint256","name":"value_","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_uri","type":"string"}],"name":"updateBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_ticketId","type":"uint256"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"bool","name":"_isAdded","type":"bool"}],"name":"updateValue","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"valueDecimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000002f295e191147d406bc7c1b732243ff5d437ce71600000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e000000000000000000000000000000000000000000000000000000000000001200000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000c566f75636865722054657374000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044142434400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001368747470733a2f2f6578616d706c652e636f6d00000000000000000000000000
-----Decoded View---------------
Arg [0] : _management (address): 0x2f295e191147d406bc7c1b732243ff5d437ce716
Arg [1] : name_ (string): Voucher Test
Arg [2] : symbol_ (string): ABCD
Arg [3] : _uri (string): https://example.com
Arg [4] : decimals_ (uint8): 18
-----Encoded View---------------
11 Constructor Arguments found :
Arg [0] : 0000000000000000000000002f295e191147d406bc7c1b732243ff5d437ce716
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [5] : 000000000000000000000000000000000000000000000000000000000000000c
Arg [6] : 566f756368657220546573740000000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [8] : 4142434400000000000000000000000000000000000000000000000000000000
Arg [9] : 0000000000000000000000000000000000000000000000000000000000000013
Arg [10] : 68747470733a2f2f6578616d706c652e636f6d00000000000000000000000000
Age | Block | Fee Address | BC Fee Address | Voting Power | Jailed | Incoming |
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