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Latest 25 from a total of 248 transactions
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Swap | 17708242 | 525 days ago | IN | 0 ETH | 0.00388488 | ||||
Swap | 17533006 | 550 days ago | IN | 0 ETH | 0.00194209 | ||||
Swap | 17489412 | 556 days ago | IN | 0 ETH | 0.00211947 | ||||
Swap | 17439552 | 563 days ago | IN | 0 ETH | 0.00337409 | ||||
Swap | 17421995 | 565 days ago | IN | 0 ETH | 0.00544697 | ||||
Swap | 17375220 | 572 days ago | IN | 0 ETH | 0.00421948 | ||||
Swap | 17328770 | 578 days ago | IN | 0 ETH | 0.00543522 | ||||
Swap | 17328597 | 578 days ago | IN | 0 ETH | 0.00932883 | ||||
Swap | 17324862 | 579 days ago | IN | 0 ETH | 0.00817325 | ||||
Swap | 17280110 | 585 days ago | IN | 0 ETH | 0.01715668 | ||||
Swap | 17191736 | 598 days ago | IN | 0 ETH | 0.01282972 | ||||
Swap | 17157810 | 602 days ago | IN | 0 ETH | 0.00559446 | ||||
Swap | 17071929 | 615 days ago | IN | 0 ETH | 0.00576702 | ||||
Swap | 17056092 | 617 days ago | IN | 0 ETH | 0.00402811 | ||||
Swap | 17040723 | 619 days ago | IN | 0 ETH | 0.00586164 | ||||
Swap | 17038654 | 619 days ago | IN | 0 ETH | 0.00510763 | ||||
Swap | 16975221 | 628 days ago | IN | 0 ETH | 0.00305697 | ||||
Swap | 16975068 | 628 days ago | IN | 0 ETH | 0.00292607 | ||||
Swap | 16960951 | 630 days ago | IN | 0 ETH | 0.00269673 | ||||
Swap | 16946549 | 632 days ago | IN | 0 ETH | 0.00333675 | ||||
Swap | 16946545 | 632 days ago | IN | 0 ETH | 0.00336849 | ||||
Swap | 16924668 | 635 days ago | IN | 0 ETH | 0.00414298 | ||||
Swap | 16913290 | 637 days ago | IN | 0 ETH | 0.00372314 | ||||
Swap | 16895364 | 640 days ago | IN | 0 ETH | 0.00187799 | ||||
Swap | 16882791 | 641 days ago | IN | 0 ETH | 0.00166318 |
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Contract Name:
Swap
Compiler Version
v0.8.7+commit.e28d00a7
Optimization Enabled:
Yes with 999999 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT /* solhint-disable var-name-mixedcase */ pragma solidity ^0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "./interfaces/ISwap.sol"; /** * @title AirSwap: Atomic Token Swap * @notice https://www.airswap.io/ */ contract Swap is ISwap, Ownable { using SafeERC20 for IERC20; bytes32 public constant DOMAIN_TYPEHASH = keccak256( abi.encodePacked( "EIP712Domain(", "string name,", "string version,", "uint256 chainId,", "address verifyingContract", ")" ) ); bytes32 public constant ORDER_TYPEHASH = keccak256( abi.encodePacked( "Order(", "uint256 nonce,", "uint256 expiry,", "address signerWallet,", "address signerToken,", "uint256 signerAmount,", "uint256 protocolFee,", "address senderWallet,", "address senderToken,", "uint256 senderAmount", ")" ) ); bytes32 public constant DOMAIN_NAME = keccak256("SWAP"); bytes32 public constant DOMAIN_VERSION = keccak256("3"); uint256 public immutable DOMAIN_CHAIN_ID; bytes32 public immutable DOMAIN_SEPARATOR; uint256 internal constant MAX_PERCENTAGE = 100; uint256 internal constant MAX_SCALE = 77; uint256 internal constant MAX_ERROR_COUNT = 6; uint256 public constant FEE_DIVISOR = 10000; /** * @notice Double mapping of signers to nonce groups to nonce states * @dev The nonce group is computed as nonce / 256, so each group of 256 sequential nonces uses the same key * @dev The nonce states are encoded as 256 bits, for each nonce in the group 0 means available and 1 means used */ mapping(address => mapping(uint256 => uint256)) internal _nonceGroups; mapping(address => address) public override authorized; uint256 public protocolFee; uint256 public protocolFeeLight; address public protocolFeeWallet; uint256 public rebateScale; uint256 public rebateMax; address public staking; constructor( uint256 _protocolFee, uint256 _protocolFeeLight, address _protocolFeeWallet, uint256 _rebateScale, uint256 _rebateMax, address _staking ) { require(_protocolFee < FEE_DIVISOR, "INVALID_FEE"); require(_protocolFeeLight < FEE_DIVISOR, "INVALID_FEE"); require(_protocolFeeWallet != address(0), "INVALID_FEE_WALLET"); require(_rebateScale <= MAX_SCALE, "SCALE_TOO_HIGH"); require(_rebateMax <= MAX_PERCENTAGE, "MAX_TOO_HIGH"); require(_staking != address(0), "INVALID_STAKING"); uint256 currentChainId = getChainId(); DOMAIN_CHAIN_ID = currentChainId; DOMAIN_SEPARATOR = keccak256( abi.encode( DOMAIN_TYPEHASH, DOMAIN_NAME, DOMAIN_VERSION, currentChainId, this ) ); protocolFee = _protocolFee; protocolFeeLight = _protocolFeeLight; protocolFeeWallet = _protocolFeeWallet; rebateScale = _rebateScale; rebateMax = _rebateMax; staking = _staking; } /** * @notice Atomic ERC20 Swap * @param nonce uint256 Unique and should be sequential * @param expiry uint256 Expiry in seconds since 1 January 1970 * @param signerWallet address Wallet of the signer * @param signerToken address ERC20 token transferred from the signer * @param signerAmount uint256 Amount transferred from the signer * @param senderToken address ERC20 token transferred from the sender * @param senderAmount uint256 Amount transferred from the sender * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function swap( address recipient, uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) external override { // Ensure the order is valid _checkValidOrder( nonce, expiry, signerWallet, signerToken, signerAmount, senderToken, senderAmount, v, r, s ); // Transfer token from sender to signer IERC20(senderToken).safeTransferFrom( msg.sender, signerWallet, senderAmount ); // Transfer token from signer to recipient IERC20(signerToken).safeTransferFrom(signerWallet, recipient, signerAmount); // Calculate and transfer protocol fee and any rebate _transferProtocolFee(signerToken, signerWallet, signerAmount); // Emit a Swap event emit Swap( nonce, block.timestamp, signerWallet, signerToken, signerAmount, protocolFee, msg.sender, senderToken, senderAmount ); } /** * @notice Swap Atomic ERC20 Swap (Low Gas Usage) * @param nonce uint256 Unique and should be sequential * @param expiry uint256 Expiry in seconds since 1 January 1970 * @param signerWallet address Wallet of the signer * @param signerToken address ERC20 token transferred from the signer * @param signerAmount uint256 Amount transferred from the signer * @param senderToken address ERC20 token transferred from the sender * @param senderAmount uint256 Amount transferred from the sender * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function light( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) external override { require(DOMAIN_CHAIN_ID == getChainId(), "CHAIN_ID_CHANGED"); // Ensure the expiry is not passed require(expiry > block.timestamp, "EXPIRY_PASSED"); // Recover the signatory from the hash and signature address signatory = ecrecover( keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256( abi.encode( ORDER_TYPEHASH, nonce, expiry, signerWallet, signerToken, signerAmount, protocolFeeLight, msg.sender, senderToken, senderAmount ) ) ) ), v, r, s ); // Ensure the signatory is not null require(signatory != address(0), "SIGNATURE_INVALID"); // Ensure the nonce is not yet used and if not mark it used require(_markNonceAsUsed(signatory, nonce), "NONCE_ALREADY_USED"); // Ensure the signatory is authorized by the signer wallet if (signerWallet != signatory) { require(authorized[signerWallet] == signatory, "UNAUTHORIZED"); } // Transfer token from sender to signer IERC20(senderToken).safeTransferFrom( msg.sender, signerWallet, senderAmount ); // Transfer token from signer to recipient IERC20(signerToken).safeTransferFrom( signerWallet, msg.sender, signerAmount ); // Transfer fee from signer to feeWallet IERC20(signerToken).safeTransferFrom( signerWallet, protocolFeeWallet, (signerAmount * protocolFeeLight) / FEE_DIVISOR ); // Emit a Swap event emit Swap( nonce, block.timestamp, signerWallet, signerToken, signerAmount, protocolFeeLight, msg.sender, senderToken, senderAmount ); } /** * @notice Sender Buys an NFT (ERC721) * @param nonce uint256 Unique and should be sequential * @param expiry uint256 Expiry in seconds since 1 January 1970 * @param signerWallet address Wallet of the signer * @param signerToken address ERC721 token transferred from the signer * @param signerID uint256 Token ID transferred from the signer * @param senderToken address ERC20 token transferred from the sender * @param senderAmount uint256 Amount transferred from the sender * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function buyNFT( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerID, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) public override { _checkValidOrder( nonce, expiry, signerWallet, signerToken, signerID, senderToken, senderAmount, v, r, s ); // Transfer token from sender to signer IERC20(senderToken).safeTransferFrom( msg.sender, signerWallet, senderAmount ); // Transfer token from signer to recipient IERC721(signerToken).transferFrom(signerWallet, msg.sender, signerID); // Calculate and transfer protocol fee and rebate _transferProtocolFee(senderToken, msg.sender, senderAmount); emit Swap( nonce, block.timestamp, signerWallet, signerToken, signerID, protocolFee, msg.sender, senderToken, senderAmount ); } /** * @notice Sender Sells an NFT (ERC721) * @param nonce uint256 Unique and should be sequential * @param expiry uint256 Expiry in seconds since 1 January 1970 * @param signerWallet address Wallet of the signer * @param signerToken address ERC20 token transferred from the signer * @param signerAmount uint256 Amount transferred from the signer * @param senderToken address ERC721 token transferred from the sender * @param senderID uint256 Token ID transferred from the sender * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function sellNFT( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderID, uint8 v, bytes32 r, bytes32 s ) public override { _checkValidOrder( nonce, expiry, signerWallet, signerToken, signerAmount, senderToken, senderID, v, r, s ); // Transfer token from sender to signer IERC721(senderToken).transferFrom(msg.sender, signerWallet, senderID); // Transfer token from signer to recipient IERC20(signerToken).safeTransferFrom( signerWallet, msg.sender, signerAmount ); // Calculate and transfer protocol fee and rebate _transferProtocolFee(signerToken, signerWallet, signerAmount); emit Swap( nonce, block.timestamp, signerWallet, signerToken, signerAmount, protocolFee, msg.sender, senderToken, senderID ); } /** * @notice Signer and sender swap NFTs (ERC721) * @param nonce uint256 Unique and should be sequential * @param expiry uint256 Expiry in seconds since 1 January 1970 * @param signerWallet address Wallet of the signer * @param signerToken address ERC721 token transferred from the signer * @param signerID uint256 Token ID transferred from the signer * @param senderToken address ERC721 token transferred from the sender * @param senderID uint256 Token ID transferred from the sender * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function swapNFTs( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerID, address senderToken, uint256 senderID, uint8 v, bytes32 r, bytes32 s ) public override { _checkValidOrder( nonce, expiry, signerWallet, signerToken, signerID, senderToken, senderID, v, r, s ); // Transfer token from sender to signer IERC721(senderToken).transferFrom(msg.sender, signerWallet, senderID); // Transfer token from signer to sender IERC721(signerToken).transferFrom(signerWallet, msg.sender, signerID); emit Swap( nonce, block.timestamp, signerWallet, signerToken, signerID, 0, msg.sender, senderToken, senderID ); } /** * @notice Set the fee * @param _protocolFee uint256 Value of the fee in basis points */ function setProtocolFee(uint256 _protocolFee) external onlyOwner { // Ensure the fee is less than divisor require(_protocolFee < FEE_DIVISOR, "INVALID_FEE"); protocolFee = _protocolFee; emit SetProtocolFee(_protocolFee); } /** * @notice Set the light fee * @param _protocolFeeLight uint256 Value of the fee in basis points */ function setProtocolFeeLight(uint256 _protocolFeeLight) external onlyOwner { // Ensure the fee is less than divisor require(_protocolFeeLight < FEE_DIVISOR, "INVALID_FEE_LIGHT"); protocolFeeLight = _protocolFeeLight; emit SetProtocolFeeLight(_protocolFeeLight); } /** * @notice Set the fee wallet * @param _protocolFeeWallet address Wallet to transfer fee to */ function setProtocolFeeWallet(address _protocolFeeWallet) external onlyOwner { // Ensure the new fee wallet is not null require(_protocolFeeWallet != address(0), "INVALID_FEE_WALLET"); protocolFeeWallet = _protocolFeeWallet; emit SetProtocolFeeWallet(_protocolFeeWallet); } /** * @notice Set scale * @dev Only owner * @param _rebateScale uint256 */ function setRebateScale(uint256 _rebateScale) external onlyOwner { require(_rebateScale <= MAX_SCALE, "SCALE_TOO_HIGH"); rebateScale = _rebateScale; emit SetRebateScale(_rebateScale); } /** * @notice Set max * @dev Only owner * @param _rebateMax uint256 */ function setRebateMax(uint256 _rebateMax) external onlyOwner { require(_rebateMax <= MAX_PERCENTAGE, "MAX_TOO_HIGH"); rebateMax = _rebateMax; emit SetRebateMax(_rebateMax); } /** * @notice Set the staking token * @param newstaking address Token to check balances on */ function setStaking(address newstaking) external onlyOwner { // Ensure the new staking token is not null require(newstaking != address(0), "INVALID_STAKING"); staking = newstaking; emit SetStaking(newstaking); } /** * @notice Authorize a signer * @param signer address Wallet of the signer to authorize * @dev Emits an Authorize event */ function authorize(address signer) external override { require(signer != address(0), "SIGNER_INVALID"); authorized[msg.sender] = signer; emit Authorize(signer, msg.sender); } /** * @notice Revoke the signer * @dev Emits a Revoke event */ function revoke() external override { address tmp = authorized[msg.sender]; delete authorized[msg.sender]; emit Revoke(tmp, msg.sender); } /** * @notice Cancel one or more nonces * @dev Cancelled nonces are marked as used * @dev Emits a Cancel event * @dev Out of gas may occur in arrays of length > 400 * @param nonces uint256[] List of nonces to cancel */ function cancel(uint256[] calldata nonces) external override { for (uint256 i = 0; i < nonces.length; i++) { uint256 nonce = nonces[i]; if (_markNonceAsUsed(msg.sender, nonce)) { emit Cancel(nonce, msg.sender); } } } /** * @notice Validates Swap Order for any potential errors * @param senderWallet address Wallet that would send the order * @param nonce uint256 Unique and should be sequential * @param expiry uint256 Expiry in seconds since 1 January 1970 * @param signerWallet address Wallet of the signer * @param signerToken address ERC20 token transferred from the signer * @param signerAmount uint256 Amount transferred from the signer * @param senderToken address ERC20 token transferred from the sender * @param senderAmount uint256 Amount transferred from the sender * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature * @return tuple of error count and bytes32[] memory array of error messages */ function check( address senderWallet, uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) public view returns (uint256, bytes32[] memory) { bytes32[] memory errors = new bytes32[](MAX_ERROR_COUNT); Order memory order; uint256 errCount; order.nonce = nonce; order.expiry = expiry; order.signerWallet = signerWallet; order.signerToken = signerToken; order.signerAmount = signerAmount; order.senderToken = senderToken; order.senderAmount = senderAmount; order.v = v; order.r = r; order.s = s; order.senderWallet = senderWallet; bytes32 hashed = _getOrderHash( order.nonce, order.expiry, order.signerWallet, order.signerToken, order.signerAmount, order.senderWallet, order.senderToken, order.senderAmount ); address signatory = _getSignatory(hashed, order.v, order.r, order.s); if (signatory == address(0)) { errors[errCount] = "SIGNATURE_INVALID"; errCount++; } if (order.expiry < block.timestamp) { errors[errCount] = "EXPIRY_PASSED"; errCount++; } if ( order.signerWallet != signatory && authorized[order.signerWallet] != signatory ) { errors[errCount] = "UNAUTHORIZED"; errCount++; } else { if (nonceUsed(signatory, order.nonce)) { errors[errCount] = "NONCE_ALREADY_USED"; errCount++; } } uint256 signerBalance = IERC20(order.signerToken).balanceOf( order.signerWallet ); uint256 signerAllowance = IERC20(order.signerToken).allowance( order.signerWallet, address(this) ); uint256 feeAmount = (order.signerAmount * protocolFee) / FEE_DIVISOR; if (signerAllowance < order.signerAmount + feeAmount) { errors[errCount] = "SIGNER_ALLOWANCE_LOW"; errCount++; } if (signerBalance < order.signerAmount + feeAmount) { errors[errCount] = "SIGNER_BALANCE_LOW"; errCount++; } return (errCount, errors); } /** * @notice Calculate output amount for an input score * @param stakingBalance uint256 * @param feeAmount uint256 */ function calculateDiscount(uint256 stakingBalance, uint256 feeAmount) public view returns (uint256) { uint256 divisor = (uint256(10)**rebateScale) + stakingBalance; return (rebateMax * stakingBalance * feeAmount) / divisor / 100; } /** * @notice Calculates and refers fee amount * @param wallet address * @param amount uint256 */ function calculateProtocolFee(address wallet, uint256 amount) public view override returns (uint256) { // Transfer fee from signer to feeWallet uint256 feeAmount = (amount * protocolFee) / FEE_DIVISOR; if (feeAmount > 0) { uint256 discountAmount = calculateDiscount( IERC20(staking).balanceOf(wallet), feeAmount ); return feeAmount - discountAmount; } return feeAmount; } /** * @notice Returns true if the nonce has been used * @param signer address Address of the signer * @param nonce uint256 Nonce being checked */ function nonceUsed(address signer, uint256 nonce) public view override returns (bool) { uint256 groupKey = nonce / 256; uint256 indexInGroup = nonce % 256; return (_nonceGroups[signer][groupKey] >> indexInGroup) & 1 == 1; } /** * @notice Returns the current chainId using the chainid opcode * @return id uint256 The chain id */ function getChainId() public view returns (uint256 id) { // no-inline-assembly assembly { id := chainid() } } /** * @notice Marks a nonce as used for the given signer * @param signer address Address of the signer for which to mark the nonce as used * @param nonce uint256 Nonce to be marked as used * @return bool True if the nonce was not marked as used already */ function _markNonceAsUsed(address signer, uint256 nonce) internal returns (bool) { uint256 groupKey = nonce / 256; uint256 indexInGroup = nonce % 256; uint256 group = _nonceGroups[signer][groupKey]; // If it is already used, return false if ((group >> indexInGroup) & 1 == 1) { return false; } _nonceGroups[signer][groupKey] = group | (uint256(1) << indexInGroup); return true; } /** * @notice Checks Order Expiry, Nonce, Signature * @param nonce uint256 Unique and should be sequential * @param expiry uint256 Expiry in seconds since 1 January 1970 * @param signerWallet address Wallet of the signer * @param signerToken address ERC20 token transferred from the signer * @param signerAmount uint256 Amount transferred from the signer * @param senderToken address ERC20 token transferred from the sender * @param senderAmount uint256 Amount transferred from the sender * @param v uint8 "v" value of the ECDSA signature * @param r bytes32 "r" value of the ECDSA signature * @param s bytes32 "s" value of the ECDSA signature */ function _checkValidOrder( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) internal { require(DOMAIN_CHAIN_ID == getChainId(), "CHAIN_ID_CHANGED"); // Ensure the expiry is not passed require(expiry > block.timestamp, "EXPIRY_PASSED"); bytes32 hashed = _getOrderHash( nonce, expiry, signerWallet, signerToken, signerAmount, msg.sender, senderToken, senderAmount ); // Recover the signatory from the hash and signature address signatory = _getSignatory(hashed, v, r, s); // Ensure the signatory is not null require(signatory != address(0), "SIGNATURE_INVALID"); // Ensure the nonce is not yet used and if not mark it used require(_markNonceAsUsed(signatory, nonce), "NONCE_ALREADY_USED"); // Ensure the signatory is authorized by the signer wallet if (signerWallet != signatory) { require(authorized[signerWallet] == signatory, "UNAUTHORIZED"); } } /** * @notice Hash order parameters * @param nonce uint256 * @param expiry uint256 * @param signerWallet address * @param signerToken address * @param signerAmount uint256 * @param senderToken address * @param senderAmount uint256 * @return bytes32 */ function _getOrderHash( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderWallet, address senderToken, uint256 senderAmount ) internal view returns (bytes32) { return keccak256( abi.encode( ORDER_TYPEHASH, nonce, expiry, signerWallet, signerToken, signerAmount, protocolFee, senderWallet, senderToken, senderAmount ) ); } /** * @notice Recover the signatory from a signature * @param hash bytes32 * @param v uint8 * @param r bytes32 * @param s bytes32 */ function _getSignatory( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal view returns (address) { return ecrecover( keccak256(abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR, hash)), v, r, s ); } /** * @notice Calculates and transfers protocol fee and rebate * @param sourceToken address * @param sourceWallet address * @param amount uint256 */ function _transferProtocolFee( address sourceToken, address sourceWallet, uint256 amount ) internal { // Transfer fee from signer to feeWallet uint256 feeAmount = (amount * protocolFee) / FEE_DIVISOR; if (feeAmount > 0) { uint256 discountAmount = calculateDiscount( IERC20(staking).balanceOf(msg.sender), feeAmount ); if (discountAmount > 0) { // Transfer fee from signer to sender IERC20(sourceToken).safeTransferFrom( sourceWallet, msg.sender, discountAmount ); // Transfer fee from signer to feeWallet IERC20(sourceToken).safeTransferFrom( sourceWallet, protocolFeeWallet, feeAmount - discountAmount ); } else { IERC20(sourceToken).safeTransferFrom( sourceWallet, protocolFeeWallet, feeAmount ); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol) pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits a {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface ISwap { struct Order { uint256 nonce; uint256 expiry; address signerWallet; address signerToken; uint256 signerAmount; address senderWallet; address senderToken; uint256 senderAmount; uint8 v; bytes32 r; bytes32 s; } event Swap( uint256 indexed nonce, uint256 timestamp, address indexed signerWallet, address signerToken, uint256 signerAmount, uint256 protocolFee, address indexed senderWallet, address senderToken, uint256 senderAmount ); event Cancel(uint256 indexed nonce, address indexed signerWallet); event Authorize(address indexed signer, address indexed signerWallet); event Revoke(address indexed signer, address indexed signerWallet); event SetProtocolFee(uint256 protocolFee); event SetProtocolFeeLight(uint256 protocolFeeLight); event SetProtocolFeeWallet(address indexed feeWallet); event SetRebateScale(uint256 rebateScale); event SetRebateMax(uint256 rebateMax); event SetStaking(address indexed staking); function swap( address recipient, uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) external; function light( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) external; function buyNFT( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) external; function sellNFT( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) external; function swapNFTs( uint256 nonce, uint256 expiry, address signerWallet, address signerToken, uint256 signerAmount, address senderToken, uint256 senderAmount, uint8 v, bytes32 r, bytes32 s ) external; function authorize(address sender) external; function revoke() external; function cancel(uint256[] calldata nonces) external; function nonceUsed(address, uint256) external view returns (bool); function authorized(address) external view returns (address); function calculateProtocolFee(address, uint256) external view returns (uint256); }
// 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 (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Address.sol) pragma solidity ^0.8.0; /** * @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 * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
{ "optimizer": { "enabled": true, "runs": 999999 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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t","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rebateMax","type":"uint256"}],"name":"setRebateMax","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rebateScale","type":"uint256"}],"name":"setRebateScale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newstaking","type":"address"}],"name":"setStaking","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"staking","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"address","name":"signerWallet","type":"address"},{"internalType":"address","name":"signerToken","type":"address"},{"internalType":"uint256","name":"signerAmount","type":"uint256"},{"internalType":"address","name":"senderToken","type":"address"},{"internalType":"uint256","name":"senderAmount","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"swap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"address","name":"signerWallet","type":"address"},{"internalType":"address","name":"signerToken","type":"address"},{"internalType":"uint256","name":"signerID","type":"uint256"},{"internalType":"address","name":"senderToken","type":"address"},{"internalType":"uint256","name":"senderID","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"swapNFTs","outputs":[],"stateMutability":"nonpayable","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)
00000000000000000000000000000000000000000000000000000000000000070000000000000000000000000000000000000000000000000000000000000007000000000000000000000000191a6da5543772779caba4730cedb2ff030b8b13000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000640000000000000000000000006d88b09805b90dad911e5c5a512eedd984d6860b
-----Decoded View---------------
Arg [0] : _protocolFee (uint256): 7
Arg [1] : _protocolFeeLight (uint256): 7
Arg [2] : _protocolFeeWallet (address): 0x191A6Da5543772779CaBa4730cEdb2fF030b8b13
Arg [3] : _rebateScale (uint256): 10
Arg [4] : _rebateMax (uint256): 100
Arg [5] : _staking (address): 0x6d88B09805b90dad911E5C5A512eEDd984D6860B
-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000007
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000007
Arg [2] : 000000000000000000000000191a6da5543772779caba4730cedb2ff030b8b13
Arg [3] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000064
Arg [5] : 0000000000000000000000006d88b09805b90dad911e5c5a512eedd984d6860b
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Multichain Portfolio | 30 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.