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Eth Value
$0.00More Info
Private Name Tags
Latest 25 from a total of 12,061 transactions
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List Trait | 19916408 | 12 hrs ago | IN | 0 ETH | 0.00104759 | ||||
Buy Trait | 19908416 | 39 hrs ago | IN | 0.015 ETH | 0.00019996 | ||||
Buy Trait | 19908386 | 39 hrs ago | IN | 0.011 ETH | 0.00018022 | ||||
Buy Trait | 19908374 | 39 hrs ago | IN | 0.017 ETH | 0.00016775 | ||||
Buy Trait | 19908372 | 39 hrs ago | IN | 0.017 ETH | 0.00017407 | ||||
List Trait | 19908240 | 39 hrs ago | IN | 0 ETH | 0.00036044 | ||||
List Trait | 19903555 | 2 days ago | IN | 0 ETH | 0.00038205 | ||||
List Trait | 19903555 | 2 days ago | IN | 0 ETH | 0.00038205 | ||||
List Trait | 19903545 | 2 days ago | IN | 0 ETH | 0.00037827 | ||||
List Trait | 19903544 | 2 days ago | IN | 0 ETH | 0.00034944 | ||||
List Trait | 19903541 | 2 days ago | IN | 0 ETH | 0.00038892 | ||||
List Trait | 19903536 | 2 days ago | IN | 0 ETH | 0.00035199 | ||||
List Trait | 19903536 | 2 days ago | IN | 0 ETH | 0.00035199 | ||||
List Trait | 19903534 | 2 days ago | IN | 0 ETH | 0.00033159 | ||||
List Trait | 19903528 | 2 days ago | IN | 0 ETH | 0.00033682 | ||||
List Trait | 19903526 | 2 days ago | IN | 0 ETH | 0.0003454 | ||||
Cancel Listing | 19903524 | 2 days ago | IN | 0 ETH | 0.000094 | ||||
List Trait | 19903522 | 2 days ago | IN | 0 ETH | 0.00034643 | ||||
List Trait | 19903521 | 2 days ago | IN | 0 ETH | 0.00035617 | ||||
List Trait | 19903519 | 2 days ago | IN | 0 ETH | 0.00033438 | ||||
List Trait | 19903518 | 2 days ago | IN | 0 ETH | 0.0003419 | ||||
List Trait | 19903511 | 2 days ago | IN | 0 ETH | 0.00036018 | ||||
List Trait | 19903510 | 2 days ago | IN | 0 ETH | 0.00037449 | ||||
List Trait | 19903505 | 2 days ago | IN | 0 ETH | 0.00032713 | ||||
List Trait | 19903505 | 2 days ago | IN | 0 ETH | 0.00032721 |
Latest 25 internal transactions (View All)
Advanced mode:
Parent Transaction Hash | Block | From | To | Value | ||
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19908416 | 39 hrs ago | 0.013875 ETH | ||||
19908416 | 39 hrs ago | 0.001125 ETH | ||||
19908386 | 39 hrs ago | 0.010175 ETH | ||||
19908386 | 39 hrs ago | 0.000825 ETH | ||||
19908374 | 39 hrs ago | 0.015725 ETH | ||||
19908374 | 39 hrs ago | 0.001275 ETH | ||||
19908372 | 39 hrs ago | 0.015725 ETH | ||||
19908372 | 39 hrs ago | 0.001275 ETH | ||||
19887290 | 4 days ago | 0.0259 ETH | ||||
19887290 | 4 days ago | 0.0021 ETH | ||||
19672647 | 34 days ago | 0.01665 ETH | ||||
19672647 | 34 days ago | 0.00135 ETH | ||||
19445858 | 66 days ago | 0.00925 ETH | ||||
19445858 | 66 days ago | 0.00075 ETH | ||||
19437544 | 67 days ago | 0.01665 ETH | ||||
19437544 | 67 days ago | 0.00135 ETH | ||||
19433344 | 68 days ago | 0.04625 ETH | ||||
19433344 | 68 days ago | 0.00375 ETH | ||||
19398861 | 73 days ago | 0.00925 ETH | ||||
19398861 | 73 days ago | 0.00075 ETH | ||||
19398412 | 73 days ago | 0.0111 ETH | ||||
19398412 | 73 days ago | 0.0009 ETH | ||||
19323769 | 83 days ago | 0.023125 ETH | ||||
19323769 | 83 days ago | 0.001875 ETH | ||||
19308518 | 85 days ago | 0.069375 ETH |
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Contract Name:
NDTrading
Compiler Version
v0.8.18+commit.87f61d96
Optimization Enabled:
Yes with 5000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.13; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; /** * @author Asteria 🍖 * @title New Dawn Trading Contract * @notice Used to buy and sell traits on the New Dawn marketplace */ contract NDTrading is Ownable { using ECDSA for bytes32; /// @param 'Empty' transactionId hasn't been used yet /// @param 'Active' transactionId currently ongoing /// @param 'Finished' transactionId has been used enum TxState { Empty, Active, Finished } struct Transaction { uint256 price; address seller; address buyer; uint256 expireAt; TxState state; } event ListTrait(uint256 indexed transactionId); event CancelListing(uint256 indexed transactionId); event BuyTrait(uint256 indexed transactionId, address indexed wallet); event BuyingDisabled(); /// @notice signer used for ECDSA verification address private signer; /// @notice min amount of time to keep a trait listed uint48 public minExpiry = 1 days; /// @notice max amount of time to keep a trait listed uint48 public maxExpiry = 180 days; address payable public NDRoyaltyAddress; uint96 public NDRoyaltyPercentage; /// @notice safe guard from malicious royalty setting. Set to 10% uint256 public constant MAX_PERCENTAGE = 1000; /// @notice mapping from id to 'Transaction' to hold all empty, active, or finished transactions mapping(uint256 txId => Transaction txInfo) public transactions; /// @notice safe guard against compromised owner bool private buyingDisabled; /// @param _signer address of the expected recovered address for 'validSignature()' /// @param _ndRoyaltyAddress address where royalties are sent from 'buyTrait()' /// @param _ndRoyaltyPercentage percentage of royalties sent from 'buyTrait()' /// (eg. 100 -> 1%) constructor( address _signer, address payable _ndRoyaltyAddress, uint256 _ndRoyaltyPercentage ) { require( _ndRoyaltyPercentage < MAX_PERCENTAGE, "ND: percentage too high" ); signer = _signer; NDRoyaltyAddress = _ndRoyaltyAddress; NDRoyaltyPercentage = uint96(_ndRoyaltyPercentage); } // ---------------------------------------------------------- // // ------------------------ INTERNAL ------------------------ // // ---------------------------------------------------------- // function validSignature( uint256 price, uint256 expireAt, address buyer, uint256 transactionId, bytes memory signature ) internal view { bytes32 hash = keccak256( abi.encodePacked( "\x19Ethereum Signed Message:\n32", keccak256( abi.encodePacked( price, expireAt, buyer, transactionId, msg.sender ) ) ) ); require(signer == hash.recover(signature), "ND: unauthorized"); } function calcRoyalties( uint256 price ) internal view returns (uint256 toSeller, uint256 toRoyaltyAddr) { toRoyaltyAddr = (price * NDRoyaltyPercentage) / 1e4; toSeller = price - toRoyaltyAddr; } function transferPayments( address payable seller, uint256 toSeller, uint256 toRoyaltyAddr ) internal { (bool royaltySuccess, ) = NDRoyaltyAddress.call{value: toRoyaltyAddr}( "" ); require(royaltySuccess, "ND: royalty transfer failed"); (bool sellerSuccess, ) = seller.call{value: toSeller}(""); require(sellerSuccess, "ND: seller transfer failed"); } // ---------------------------------------------------------- // // ------------------------ EXTERNAL ------------------------ // // ---------------------------------------------------------- // /// @notice allows listing traits on the new dawn trait marketplace /// @param price amount in ETH to list the given trait for /// @param expireAt 'block.timestamp' of when to expire the current 'signature' /// @param buyer optional address of who can buy the specific trait /// @param transactionId specific id to be emitted and listened for off-chain /// @param signature bytes signature signed by 'signer' function listTrait( uint256 price, uint256 expireAt, address buyer, uint256 transactionId, bytes memory signature ) external { require(price > 0, "ND: invalid price"); require(expireAt < block.timestamp + maxExpiry, "ND: expiry too long"); require(expireAt > block.timestamp + minExpiry, "ND: expiry too short"); Transaction storage transaction = transactions[transactionId]; require(transaction.state == TxState.Empty, "ND: txId not empty"); validSignature(price, expireAt, buyer, transactionId, signature); transaction.price = price; transaction.seller = msg.sender; transaction.buyer = buyer; transaction.expireAt = expireAt; transaction.state = TxState.Active; emit ListTrait(transactionId); } /// @notice allows cancelling a previously listed trait(s) on the new dawn trait martetplace /// @param transactionId specific id mapped to a specific transaction to cancel /// custom:reverts if state isn't active or seller doesn't equal msg.sender /// it won't revert if the transaction's 'expireAt' has been met function cancelListing(uint256 transactionId) external { Transaction storage txn = transactions[transactionId]; if (txn.expireAt > block.timestamp) { require(txn.state == TxState.Active, "ND: listing not active"); require(msg.sender == txn.seller, "ND: not seller"); } txn.state = TxState.Finished; emit CancelListing(transactionId); } /// @notice allows users to buy previously listed trait(s) on the new dawn trait martetplace /// @param transactionId specific id mapped to a specific transaction to buy function buyTrait(uint256 transactionId) external payable { require(!buyingDisabled, "ND: buying disabled"); Transaction storage txn = transactions[transactionId]; (uint256 toSeller, uint256 toRoyaltyAddr) = calcRoyalties(txn.price); require(txn.state == TxState.Active, "ND: listing not active"); require(txn.expireAt > block.timestamp, "ND: transaction expired"); require(txn.price == msg.value, "ND: invalid value"); require(txn.seller != msg.sender, "ND: seller cannot be buyer"); if (txn.buyer != address(0)) require(txn.buyer == msg.sender, "ND: invalid buyer"); address payable seller = payable(txn.seller); txn.state = TxState.Finished; transferPayments(seller, toSeller, toRoyaltyAddr); emit BuyTrait(transactionId, msg.sender); } // ------------------------------------------------------------ // // ------------------------ ONLY OWNER ------------------------ // // ------------------------------------------------------------ // /// @notice sets 'signer' /// only callable by 'owner' function setSigner(address _signer) external onlyOwner { signer = _signer; } /// @notice sets 'NDRoyaltyAddress' 'NDRoyaltyPercentage' /// only callable by 'owner' function setRoyaltyInfo( address payable _royaltyAddress, uint256 _royaltyPercentage ) external onlyOwner { require(_royaltyPercentage < MAX_PERCENTAGE, "ND: percentage too high"); NDRoyaltyAddress = _royaltyAddress; NDRoyaltyPercentage = uint96(_royaltyPercentage); } /// @notice sets 'transactions['transactionId']' to '_txInfo' /// only callable by 'owner' function setTransactionDetails( uint256 transactionId, Transaction calldata _txInfo ) external onlyOwner { transactions[transactionId] = _txInfo; } /// @notice sets 'minExpiry' and 'maxExpiry /// only callable by 'owner' function setExpiries( uint48 newMinExpiry, uint48 newMaxExpiry ) external onlyOwner { minExpiry = newMinExpiry; maxExpiry = newMaxExpiry; } /// @notice sets 'BuyingDisabled' to true /// only callable by 'owner' function disableBuying() external onlyOwner { buyingDisabled = true; emit BuyingDisabled(); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (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 // Deprecated in v4.8 } 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"); } } /** * @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) { 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. /// @solidity memory-safe-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 { 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 = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 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 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 // 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); } }
{ "optimizer": { "enabled": true, "runs": 5000 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "remappings": [ "@openzeppelin/=lib/openzeppelin-contracts/", "ds-test/=lib/forge-std/lib/ds-test/src/", "forge-std/=lib/forge-std/src/", "murky/=lib/murky/src/", "openzeppelin-contracts/=lib/openzeppelin-contracts/" ], "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"_signer","type":"address"},{"internalType":"address payable","name":"_ndRoyaltyAddress","type":"address"},{"internalType":"uint256","name":"_ndRoyaltyPercentage","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"transactionId","type":"uint256"},{"indexed":true,"internalType":"address","name":"wallet","type":"address"}],"name":"BuyTrait","type":"event"},{"anonymous":false,"inputs":[],"name":"BuyingDisabled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"transactionId","type":"uint256"}],"name":"CancelListing","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"transactionId","type":"uint256"}],"name":"ListTrait","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"MAX_PERCENTAGE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"NDRoyaltyAddress","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"NDRoyaltyPercentage","outputs":[{"internalType":"uint96","name":"","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"transactionId","type":"uint256"}],"name":"buyTrait","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"transactionId","type":"uint256"}],"name":"cancelListing","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"disableBuying","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"expireAt","type":"uint256"},{"internalType":"address","name":"buyer","type":"address"},{"internalType":"uint256","name":"transactionId","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"listTrait","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxExpiry","outputs":[{"internalType":"uint48","name":"","type":"uint48"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minExpiry","outputs":[{"internalType":"uint48","name":"","type":"uint48"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint48","name":"newMinExpiry","type":"uint48"},{"internalType":"uint48","name":"newMaxExpiry","type":"uint48"}],"name":"setExpiries","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address payable","name":"_royaltyAddress","type":"address"},{"internalType":"uint256","name":"_royaltyPercentage","type":"uint256"}],"name":"setRoyaltyInfo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_signer","type":"address"}],"name":"setSigner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"transactionId","type":"uint256"},{"components":[{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"address","name":"buyer","type":"address"},{"internalType":"uint256","name":"expireAt","type":"uint256"},{"internalType":"enum NDTrading.TxState","name":"state","type":"uint8"}],"internalType":"struct NDTrading.Transaction","name":"_txInfo","type":"tuple"}],"name":"setTransactionDetails","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"txId","type":"uint256"}],"name":"transactions","outputs":[{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"address","name":"buyer","type":"address"},{"internalType":"uint256","name":"expireAt","type":"uint256"},{"internalType":"enum NDTrading.TxState","name":"state","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000034e80264f020b5ce469c3faf4374c1d8607a3930000000000000000000000000ddcc87f1d5801ba46dee90932fb83509d5c9947c00000000000000000000000000000000000000000000000000000000000002ee
-----Decoded View---------------
Arg [0] : _signer (address): 0x34e80264f020b5cE469c3faf4374c1d8607a3930
Arg [1] : _ndRoyaltyAddress (address): 0xddcc87F1D5801ba46dee90932fB83509d5C9947c
Arg [2] : _ndRoyaltyPercentage (uint256): 750
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000034e80264f020b5ce469c3faf4374c1d8607a3930
Arg [1] : 000000000000000000000000ddcc87f1d5801ba46dee90932fb83509d5c9947c
Arg [2] : 00000000000000000000000000000000000000000000000000000000000002ee
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Multichain Portfolio | 25 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.