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Latest 25 from a total of 515 transactions
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Market Sell Orde... | 7676325 | 1951 days ago | IN | 0.00614892 ETH | 0.0065355 | ||||
Market Sell Orde... | 7670997 | 1952 days ago | IN | 0.05 ETH | 0.00653166 | ||||
Market Sell Orde... | 7647003 | 1956 days ago | IN | 0.322248 ETH | 0.00703437 | ||||
Market Sell Orde... | 7646992 | 1956 days ago | IN | 0.322248 ETH | 0.00655275 | ||||
Market Sell Orde... | 7646985 | 1956 days ago | IN | 0.322248 ETH | 0.00702261 | ||||
Market Sell Orde... | 7636694 | 1957 days ago | IN | 0.30382208 ETH | 0.006561 | ||||
Market Sell Orde... | 7626258 | 1959 days ago | IN | 0.000001 ETH | 0.00653166 | ||||
Market Sell Orde... | 7624731 | 1959 days ago | IN | 0.09 ETH | 0.00640536 | ||||
Market Sell Orde... | 7624592 | 1959 days ago | IN | 0.001 ETH | 0.00601461 | ||||
Market Buy Order... | 7589199 | 1965 days ago | IN | 0.00035458 ETH | 0.00174606 | ||||
Market Buy Order... | 7557951 | 1969 days ago | IN | 0.00000354 ETH | 0.0001746 | ||||
Market Sell Orde... | 7550559 | 1971 days ago | IN | 0.00606207 ETH | 0.00520404 | ||||
Market Sell Orde... | 7548876 | 1971 days ago | IN | 0.0120751 ETH | 0.00749814 | ||||
Market Sell Orde... | 7548032 | 1971 days ago | IN | 0.00605216 ETH | 0.00520404 | ||||
Market Sell Orde... | 7547541 | 1971 days ago | IN | 0.0060709 ETH | 0.01016475 | ||||
Market Sell Orde... | 7545104 | 1971 days ago | IN | 0.00005839 ETH | 0.0068281 | ||||
Market Sell Orde... | 7544723 | 1971 days ago | IN | 0.00291086 ETH | 0.0081318 | ||||
Market Buy Order... | 7455587 | 1985 days ago | IN | 0.00035458 ETH | 0.00319212 | ||||
Market Buy Order... | 7455433 | 1985 days ago | IN | 0.00028366 ETH | 0.00207487 | ||||
Market Sell Orde... | 7409305 | 1993 days ago | IN | 0.00716691 ETH | 0.00069412 | ||||
Market Sell Orde... | 7356046 | 2001 days ago | IN | 0.00750694 ETH | 0.00069361 | ||||
Market Sell Orde... | 7345809 | 2002 days ago | IN | 0.00733245 ETH | 0.00069387 | ||||
Market Sell Orde... | 7345807 | 2002 days ago | IN | 0.00732976 ETH | 0.00069387 | ||||
Market Sell Orde... | 7345734 | 2002 days ago | IN | 0.0073046 ETH | 0.00061081 | ||||
Market Sell Orde... | 7345732 | 2002 days ago | IN | 0.00732332 ETH | 0.00069336 |
Latest 25 internal transactions (View All)
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Parent Transaction Hash | Block | From | To | |||
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7676325 | 1951 days ago | 0.00030744 ETH | ||||
7676325 | 1951 days ago | 0.00030744 ETH | ||||
7676325 | 1951 days ago | 0.00614892 ETH | ||||
7670997 | 1952 days ago | 0.0025 ETH | ||||
7670997 | 1952 days ago | 0.0025 ETH | ||||
7670997 | 1952 days ago | 0.05 ETH | ||||
7647003 | 1956 days ago | 0.0161124 ETH | ||||
7647003 | 1956 days ago | 0.0161124 ETH | ||||
7647003 | 1956 days ago | 0.322248 ETH | ||||
7646992 | 1956 days ago | 0.0161124 ETH | ||||
7646992 | 1956 days ago | 0.0161124 ETH | ||||
7646992 | 1956 days ago | 0.322248 ETH | ||||
7646985 | 1956 days ago | 0.0161124 ETH | ||||
7646985 | 1956 days ago | 0.0161124 ETH | ||||
7646985 | 1956 days ago | 0.322248 ETH | ||||
7636694 | 1957 days ago | 0.0151911 ETH | ||||
7636694 | 1957 days ago | 0.0151911 ETH | ||||
7636694 | 1957 days ago | 0.30382208 ETH | ||||
7626258 | 1959 days ago | 0.00000005 ETH | ||||
7626258 | 1959 days ago | 0.00000005 ETH | ||||
7626258 | 1959 days ago | 0.000001 ETH | ||||
7624731 | 1959 days ago | 0.0045 ETH | ||||
7624731 | 1959 days ago | 0.0045 ETH | ||||
7624731 | 1959 days ago | 0.09 ETH | ||||
7624592 | 1959 days ago | 0.00005 ETH |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0xDc4587Cb...066290e6A The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
Forwarder
Compiler Version
v0.4.24+commit.e67f0147
Optimization Enabled:
Yes with 1000000 runs
Other Settings:
byzantium EvmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2019-07-13 */ /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; pragma experimental ABIEncoderV2; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; pragma solidity 0.4.24; contract SafeMath { function safeMul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require( c / a == b, "UINT256_OVERFLOW" ); return c; } function safeDiv(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a / b; return c; } function safeSub(uint256 a, uint256 b) internal pure returns (uint256) { require( b <= a, "UINT256_UNDERFLOW" ); return a - b; } function safeAdd(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require( c >= a, "UINT256_OVERFLOW" ); return c; } function max64(uint64 a, uint64 b) internal pure returns (uint256) { return a >= b ? a : b; } function min64(uint64 a, uint64 b) internal pure returns (uint256) { return a < b ? a : b; } function max256(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } function min256(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } } contract LibMath is SafeMath { /// @dev Calculates partial value given a numerator and denominator rounded down. /// Reverts if rounding error is >= 0.1% /// @param numerator Numerator. /// @param denominator Denominator. /// @param target Value to calculate partial of. /// @return Partial value of target rounded down. function safeGetPartialAmountFloor( uint256 numerator, uint256 denominator, uint256 target ) internal pure returns (uint256 partialAmount) { require( denominator > 0, "DIVISION_BY_ZERO" ); require( !isRoundingErrorFloor( numerator, denominator, target ), "ROUNDING_ERROR" ); partialAmount = safeDiv( safeMul(numerator, target), denominator ); return partialAmount; } /// @dev Calculates partial value given a numerator and denominator rounded down. /// Reverts if rounding error is >= 0.1% /// @param numerator Numerator. /// @param denominator Denominator. /// @param target Value to calculate partial of. /// @return Partial value of target rounded up. function safeGetPartialAmountCeil( uint256 numerator, uint256 denominator, uint256 target ) internal pure returns (uint256 partialAmount) { require( denominator > 0, "DIVISION_BY_ZERO" ); require( !isRoundingErrorCeil( numerator, denominator, target ), "ROUNDING_ERROR" ); // safeDiv computes `floor(a / b)`. We use the identity (a, b integer): // ceil(a / b) = floor((a + b - 1) / b) // To implement `ceil(a / b)` using safeDiv. partialAmount = safeDiv( safeAdd( safeMul(numerator, target), safeSub(denominator, 1) ), denominator ); return partialAmount; } /// @dev Calculates partial value given a numerator and denominator rounded down. /// @param numerator Numerator. /// @param denominator Denominator. /// @param target Value to calculate partial of. /// @return Partial value of target rounded down. function getPartialAmountFloor( uint256 numerator, uint256 denominator, uint256 target ) internal pure returns (uint256 partialAmount) { require( denominator > 0, "DIVISION_BY_ZERO" ); partialAmount = safeDiv( safeMul(numerator, target), denominator ); return partialAmount; } /// @dev Calculates partial value given a numerator and denominator rounded down. /// @param numerator Numerator. /// @param denominator Denominator. /// @param target Value to calculate partial of. /// @return Partial value of target rounded up. function getPartialAmountCeil( uint256 numerator, uint256 denominator, uint256 target ) internal pure returns (uint256 partialAmount) { require( denominator > 0, "DIVISION_BY_ZERO" ); // safeDiv computes `floor(a / b)`. We use the identity (a, b integer): // ceil(a / b) = floor((a + b - 1) / b) // To implement `ceil(a / b)` using safeDiv. partialAmount = safeDiv( safeAdd( safeMul(numerator, target), safeSub(denominator, 1) ), denominator ); return partialAmount; } /// @dev Checks if rounding error >= 0.1% when rounding down. /// @param numerator Numerator. /// @param denominator Denominator. /// @param target Value to multiply with numerator/denominator. /// @return Rounding error is present. function isRoundingErrorFloor( uint256 numerator, uint256 denominator, uint256 target ) internal pure returns (bool isError) { require( denominator > 0, "DIVISION_BY_ZERO" ); // The absolute rounding error is the difference between the rounded // value and the ideal value. The relative rounding error is the // absolute rounding error divided by the absolute value of the // ideal value. This is undefined when the ideal value is zero. // // The ideal value is `numerator * target / denominator`. // Let's call `numerator * target % denominator` the remainder. // The absolute error is `remainder / denominator`. // // When the ideal value is zero, we require the absolute error to // be zero. Fortunately, this is always the case. The ideal value is // zero iff `numerator == 0` and/or `target == 0`. In this case the // remainder and absolute error are also zero. if (target == 0 || numerator == 0) { return false; } // Otherwise, we want the relative rounding error to be strictly // less than 0.1%. // The relative error is `remainder / (numerator * target)`. // We want the relative error less than 1 / 1000: // remainder / (numerator * denominator) < 1 / 1000 // or equivalently: // 1000 * remainder < numerator * target // so we have a rounding error iff: // 1000 * remainder >= numerator * target uint256 remainder = mulmod( target, numerator, denominator ); isError = safeMul(1000, remainder) >= safeMul(numerator, target); return isError; } /// @dev Checks if rounding error >= 0.1% when rounding up. /// @param numerator Numerator. /// @param denominator Denominator. /// @param target Value to multiply with numerator/denominator. /// @return Rounding error is present. function isRoundingErrorCeil( uint256 numerator, uint256 denominator, uint256 target ) internal pure returns (bool isError) { require( denominator > 0, "DIVISION_BY_ZERO" ); // See the comments in `isRoundingError`. if (target == 0 || numerator == 0) { // When either is zero, the ideal value and rounded value are zero // and there is no rounding error. (Although the relative error // is undefined.) return false; } // Compute remainder as before uint256 remainder = mulmod( target, numerator, denominator ); remainder = safeSub(denominator, remainder) % denominator; isError = safeMul(1000, remainder) >= safeMul(numerator, target); return isError; } } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; library LibBytes { using LibBytes for bytes; /// @dev Gets the memory address for a byte array. /// @param input Byte array to lookup. /// @return memoryAddress Memory address of byte array. This /// points to the header of the byte array which contains /// the length. function rawAddress(bytes memory input) internal pure returns (uint256 memoryAddress) { assembly { memoryAddress := input } return memoryAddress; } /// @dev Gets the memory address for the contents of a byte array. /// @param input Byte array to lookup. /// @return memoryAddress Memory address of the contents of the byte array. function contentAddress(bytes memory input) internal pure returns (uint256 memoryAddress) { assembly { memoryAddress := add(input, 32) } return memoryAddress; } /// @dev Copies `length` bytes from memory location `source` to `dest`. /// @param dest memory address to copy bytes to. /// @param source memory address to copy bytes from. /// @param length number of bytes to copy. function memCopy( uint256 dest, uint256 source, uint256 length ) internal pure { if (length < 32) { // Handle a partial word by reading destination and masking // off the bits we are interested in. // This correctly handles overlap, zero lengths and source == dest assembly { let mask := sub(exp(256, sub(32, length)), 1) let s := and(mload(source), not(mask)) let d := and(mload(dest), mask) mstore(dest, or(s, d)) } } else { // Skip the O(length) loop when source == dest. if (source == dest) { return; } // For large copies we copy whole words at a time. The final // word is aligned to the end of the range (instead of after the // previous) to handle partial words. So a copy will look like this: // // #### // #### // #### // #### // // We handle overlap in the source and destination range by // changing the copying direction. This prevents us from // overwriting parts of source that we still need to copy. // // This correctly handles source == dest // if (source > dest) { assembly { // We subtract 32 from `sEnd` and `dEnd` because it // is easier to compare with in the loop, and these // are also the addresses we need for copying the // last bytes. length := sub(length, 32) let sEnd := add(source, length) let dEnd := add(dest, length) // Remember the last 32 bytes of source // This needs to be done here and not after the loop // because we may have overwritten the last bytes in // source already due to overlap. let last := mload(sEnd) // Copy whole words front to back // Note: the first check is always true, // this could have been a do-while loop. // solhint-disable-next-line no-empty-blocks for {} lt(source, sEnd) {} { mstore(dest, mload(source)) source := add(source, 32) dest := add(dest, 32) } // Write the last 32 bytes mstore(dEnd, last) } } else { assembly { // We subtract 32 from `sEnd` and `dEnd` because those // are the starting points when copying a word at the end. length := sub(length, 32) let sEnd := add(source, length) let dEnd := add(dest, length) // Remember the first 32 bytes of source // This needs to be done here and not after the loop // because we may have overwritten the first bytes in // source already due to overlap. let first := mload(source) // Copy whole words back to front // We use a signed comparisson here to allow dEnd to become // negative (happens when source and dest < 32). Valid // addresses in local memory will never be larger than // 2**255, so they can be safely re-interpreted as signed. // Note: the first check is always true, // this could have been a do-while loop. // solhint-disable-next-line no-empty-blocks for {} slt(dest, dEnd) {} { mstore(dEnd, mload(sEnd)) sEnd := sub(sEnd, 32) dEnd := sub(dEnd, 32) } // Write the first 32 bytes mstore(dest, first) } } } } /// @dev Returns a slices from a byte array. /// @param b The byte array to take a slice from. /// @param from The starting index for the slice (inclusive). /// @param to The final index for the slice (exclusive). /// @return result The slice containing bytes at indices [from, to) function slice( bytes memory b, uint256 from, uint256 to ) internal pure returns (bytes memory result) { require( from <= to, "FROM_LESS_THAN_TO_REQUIRED" ); require( to < b.length, "TO_LESS_THAN_LENGTH_REQUIRED" ); // Create a new bytes structure and copy contents result = new bytes(to - from); memCopy( result.contentAddress(), b.contentAddress() + from, result.length ); return result; } /// @dev Returns a slice from a byte array without preserving the input. /// @param b The byte array to take a slice from. Will be destroyed in the process. /// @param from The starting index for the slice (inclusive). /// @param to The final index for the slice (exclusive). /// @return result The slice containing bytes at indices [from, to) /// @dev When `from == 0`, the original array will match the slice. In other cases its state will be corrupted. function sliceDestructive( bytes memory b, uint256 from, uint256 to ) internal pure returns (bytes memory result) { require( from <= to, "FROM_LESS_THAN_TO_REQUIRED" ); require( to < b.length, "TO_LESS_THAN_LENGTH_REQUIRED" ); // Create a new bytes structure around [from, to) in-place. assembly { result := add(b, from) mstore(result, sub(to, from)) } return result; } /// @dev Pops the last byte off of a byte array by modifying its length. /// @param b Byte array that will be modified. /// @return The byte that was popped off. function popLastByte(bytes memory b) internal pure returns (bytes1 result) { require( b.length > 0, "GREATER_THAN_ZERO_LENGTH_REQUIRED" ); // Store last byte. result = b[b.length - 1]; assembly { // Decrement length of byte array. let newLen := sub(mload(b), 1) mstore(b, newLen) } return result; } /// @dev Pops the last 20 bytes off of a byte array by modifying its length. /// @param b Byte array that will be modified. /// @return The 20 byte address that was popped off. function popLast20Bytes(bytes memory b) internal pure returns (address result) { require( b.length >= 20, "GREATER_OR_EQUAL_TO_20_LENGTH_REQUIRED" ); // Store last 20 bytes. result = readAddress(b, b.length - 20); assembly { // Subtract 20 from byte array length. let newLen := sub(mload(b), 20) mstore(b, newLen) } return result; } /// @dev Tests equality of two byte arrays. /// @param lhs First byte array to compare. /// @param rhs Second byte array to compare. /// @return True if arrays are the same. False otherwise. function equals( bytes memory lhs, bytes memory rhs ) internal pure returns (bool equal) { // Keccak gas cost is 30 + numWords * 6. This is a cheap way to compare. // We early exit on unequal lengths, but keccak would also correctly // handle this. return lhs.length == rhs.length && keccak256(lhs) == keccak256(rhs); } /// @dev Reads an address from a position in a byte array. /// @param b Byte array containing an address. /// @param index Index in byte array of address. /// @return address from byte array. function readAddress( bytes memory b, uint256 index ) internal pure returns (address result) { require( b.length >= index + 20, // 20 is length of address "GREATER_OR_EQUAL_TO_20_LENGTH_REQUIRED" ); // Add offset to index: // 1. Arrays are prefixed by 32-byte length parameter (add 32 to index) // 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index) index += 20; // Read address from array memory assembly { // 1. Add index to address of bytes array // 2. Load 32-byte word from memory // 3. Apply 20-byte mask to obtain address result := and(mload(add(b, index)), 0xffffffffffffffffffffffffffffffffffffffff) } return result; } /// @dev Writes an address into a specific position in a byte array. /// @param b Byte array to insert address into. /// @param index Index in byte array of address. /// @param input Address to put into byte array. function writeAddress( bytes memory b, uint256 index, address input ) internal pure { require( b.length >= index + 20, // 20 is length of address "GREATER_OR_EQUAL_TO_20_LENGTH_REQUIRED" ); // Add offset to index: // 1. Arrays are prefixed by 32-byte length parameter (add 32 to index) // 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index) index += 20; // Store address into array memory assembly { // The address occupies 20 bytes and mstore stores 32 bytes. // First fetch the 32-byte word where we'll be storing the address, then // apply a mask so we have only the bytes in the word that the address will not occupy. // Then combine these bytes with the address and store the 32 bytes back to memory with mstore. // 1. Add index to address of bytes array // 2. Load 32-byte word from memory // 3. Apply 12-byte mask to obtain extra bytes occupying word of memory where we'll store the address let neighbors := and( mload(add(b, index)), 0xffffffffffffffffffffffff0000000000000000000000000000000000000000 ) // Make sure input address is clean. // (Solidity does not guarantee this) input := and(input, 0xffffffffffffffffffffffffffffffffffffffff) // Store the neighbors and address into memory mstore(add(b, index), xor(input, neighbors)) } } /// @dev Reads a bytes32 value from a position in a byte array. /// @param b Byte array containing a bytes32 value. /// @param index Index in byte array of bytes32 value. /// @return bytes32 value from byte array. function readBytes32( bytes memory b, uint256 index ) internal pure returns (bytes32 result) { require( b.length >= index + 32, "GREATER_OR_EQUAL_TO_32_LENGTH_REQUIRED" ); // Arrays are prefixed by a 256 bit length parameter index += 32; // Read the bytes32 from array memory assembly { result := mload(add(b, index)) } return result; } /// @dev Writes a bytes32 into a specific position in a byte array. /// @param b Byte array to insert <input> into. /// @param index Index in byte array of <input>. /// @param input bytes32 to put into byte array. function writeBytes32( bytes memory b, uint256 index, bytes32 input ) internal pure { require( b.length >= index + 32, "GREATER_OR_EQUAL_TO_32_LENGTH_REQUIRED" ); // Arrays are prefixed by a 256 bit length parameter index += 32; // Read the bytes32 from array memory assembly { mstore(add(b, index), input) } } /// @dev Reads a uint256 value from a position in a byte array. /// @param b Byte array containing a uint256 value. /// @param index Index in byte array of uint256 value. /// @return uint256 value from byte array. function readUint256( bytes memory b, uint256 index ) internal pure returns (uint256 result) { result = uint256(readBytes32(b, index)); return result; } /// @dev Writes a uint256 into a specific position in a byte array. /// @param b Byte array to insert <input> into. /// @param index Index in byte array of <input>. /// @param input uint256 to put into byte array. function writeUint256( bytes memory b, uint256 index, uint256 input ) internal pure { writeBytes32(b, index, bytes32(input)); } /// @dev Reads an unpadded bytes4 value from a position in a byte array. /// @param b Byte array containing a bytes4 value. /// @param index Index in byte array of bytes4 value. /// @return bytes4 value from byte array. function readBytes4( bytes memory b, uint256 index ) internal pure returns (bytes4 result) { require( b.length >= index + 4, "GREATER_OR_EQUAL_TO_4_LENGTH_REQUIRED" ); // Arrays are prefixed by a 32 byte length field index += 32; // Read the bytes4 from array memory assembly { result := mload(add(b, index)) // Solidity does not require us to clean the trailing bytes. // We do it anyway result := and(result, 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000) } return result; } /// @dev Reads nested bytes from a specific position. /// @dev NOTE: the returned value overlaps with the input value. /// Both should be treated as immutable. /// @param b Byte array containing nested bytes. /// @param index Index of nested bytes. /// @return result Nested bytes. function readBytesWithLength( bytes memory b, uint256 index ) internal pure returns (bytes memory result) { // Read length of nested bytes uint256 nestedBytesLength = readUint256(b, index); index += 32; // Assert length of <b> is valid, given // length of nested bytes require( b.length >= index + nestedBytesLength, "GREATER_OR_EQUAL_TO_NESTED_BYTES_LENGTH_REQUIRED" ); // Return a pointer to the byte array as it exists inside `b` assembly { result := add(b, index) } return result; } /// @dev Inserts bytes at a specific position in a byte array. /// @param b Byte array to insert <input> into. /// @param index Index in byte array of <input>. /// @param input bytes to insert. function writeBytesWithLength( bytes memory b, uint256 index, bytes memory input ) internal pure { // Assert length of <b> is valid, given // length of input require( b.length >= index + 32 + input.length, // 32 bytes to store length "GREATER_OR_EQUAL_TO_NESTED_BYTES_LENGTH_REQUIRED" ); // Copy <input> into <b> memCopy( b.contentAddress() + index, input.rawAddress(), // includes length of <input> input.length + 32 // +32 bytes to store <input> length ); } /// @dev Performs a deep copy of a byte array onto another byte array of greater than or equal length. /// @param dest Byte array that will be overwritten with source bytes. /// @param source Byte array to copy onto dest bytes. function deepCopyBytes( bytes memory dest, bytes memory source ) internal pure { uint256 sourceLen = source.length; // Dest length must be >= source length, or some bytes would not be copied. require( dest.length >= sourceLen, "GREATER_OR_EQUAL_TO_SOURCE_BYTES_LENGTH_REQUIRED" ); memCopy( dest.contentAddress(), source.contentAddress(), sourceLen ); } } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract LibEIP712 { // EIP191 header for EIP712 prefix string constant internal EIP191_HEADER = "\x19\x01"; // EIP712 Domain Name value string constant internal EIP712_DOMAIN_NAME = "0x Protocol"; // EIP712 Domain Version value string constant internal EIP712_DOMAIN_VERSION = "2"; // Hash of the EIP712 Domain Separator Schema bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(abi.encodePacked( "EIP712Domain(", "string name,", "string version,", "address verifyingContract", ")" )); // Hash of the EIP712 Domain Separator data // solhint-disable-next-line var-name-mixedcase bytes32 public EIP712_DOMAIN_HASH; constructor () public { EIP712_DOMAIN_HASH = keccak256(abi.encodePacked( EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH, keccak256(bytes(EIP712_DOMAIN_NAME)), keccak256(bytes(EIP712_DOMAIN_VERSION)), bytes32(address(this)) )); } /// @dev Calculates EIP712 encoding for a hash struct in this EIP712 Domain. /// @param hashStruct The EIP712 hash struct. /// @return EIP712 hash applied to this EIP712 Domain. function hashEIP712Message(bytes32 hashStruct) internal view returns (bytes32 result) { bytes32 eip712DomainHash = EIP712_DOMAIN_HASH; // Assembly for more efficient computing: // keccak256(abi.encodePacked( // EIP191_HEADER, // EIP712_DOMAIN_HASH, // hashStruct // )); assembly { // Load free memory pointer let memPtr := mload(64) mstore(memPtr, 0x1901000000000000000000000000000000000000000000000000000000000000) // EIP191 header mstore(add(memPtr, 2), eip712DomainHash) // EIP712 domain hash mstore(add(memPtr, 34), hashStruct) // Hash of struct // Compute hash result := keccak256(memPtr, 66) } return result; } } contract LibOrder is LibEIP712 { // Hash for the EIP712 Order Schema bytes32 constant internal EIP712_ORDER_SCHEMA_HASH = keccak256(abi.encodePacked( "Order(", "address makerAddress,", "address takerAddress,", "address feeRecipientAddress,", "address senderAddress,", "uint256 makerAssetAmount,", "uint256 takerAssetAmount,", "uint256 makerFee,", "uint256 takerFee,", "uint256 expirationTimeSeconds,", "uint256 salt,", "bytes makerAssetData,", "bytes takerAssetData", ")" )); // A valid order remains fillable until it is expired, fully filled, or cancelled. // An order's state is unaffected by external factors, like account balances. enum OrderStatus { INVALID, // Default value INVALID_MAKER_ASSET_AMOUNT, // Order does not have a valid maker asset amount INVALID_TAKER_ASSET_AMOUNT, // Order does not have a valid taker asset amount FILLABLE, // Order is fillable EXPIRED, // Order has already expired FULLY_FILLED, // Order is fully filled CANCELLED // Order has been cancelled } // solhint-disable max-line-length struct Order { address makerAddress; // Address that created the order. address takerAddress; // Address that is allowed to fill the order. If set to 0, any address is allowed to fill the order. address feeRecipientAddress; // Address that will recieve fees when order is filled. address senderAddress; // Address that is allowed to call Exchange contract methods that affect this order. If set to 0, any address is allowed to call these methods. uint256 makerAssetAmount; // Amount of makerAsset being offered by maker. Must be greater than 0. uint256 takerAssetAmount; // Amount of takerAsset being bid on by maker. Must be greater than 0. uint256 makerFee; // Amount of ZRX paid to feeRecipient by maker when order is filled. If set to 0, no transfer of ZRX from maker to feeRecipient will be attempted. uint256 takerFee; // Amount of ZRX paid to feeRecipient by taker when order is filled. If set to 0, no transfer of ZRX from taker to feeRecipient will be attempted. uint256 expirationTimeSeconds; // Timestamp in seconds at which order expires. uint256 salt; // Arbitrary number to facilitate uniqueness of the order's hash. bytes makerAssetData; // Encoded data that can be decoded by a specified proxy contract when transferring makerAsset. The last byte references the id of this proxy. bytes takerAssetData; // Encoded data that can be decoded by a specified proxy contract when transferring takerAsset. The last byte references the id of this proxy. } // solhint-enable max-line-length struct OrderInfo { uint8 orderStatus; // Status that describes order's validity and fillability. bytes32 orderHash; // EIP712 hash of the order (see LibOrder.getOrderHash). uint256 orderTakerAssetFilledAmount; // Amount of order that has already been filled. } /// @dev Calculates Keccak-256 hash of the order. /// @param order The order structure. /// @return Keccak-256 EIP712 hash of the order. function getOrderHash(Order memory order) internal view returns (bytes32 orderHash) { orderHash = hashEIP712Message(hashOrder(order)); return orderHash; } /// @dev Calculates EIP712 hash of the order. /// @param order The order structure. /// @return EIP712 hash of the order. function hashOrder(Order memory order) internal pure returns (bytes32 result) { bytes32 schemaHash = EIP712_ORDER_SCHEMA_HASH; bytes32 makerAssetDataHash = keccak256(order.makerAssetData); bytes32 takerAssetDataHash = keccak256(order.takerAssetData); // Assembly for more efficiently computing: // keccak256(abi.encodePacked( // EIP712_ORDER_SCHEMA_HASH, // bytes32(order.makerAddress), // bytes32(order.takerAddress), // bytes32(order.feeRecipientAddress), // bytes32(order.senderAddress), // order.makerAssetAmount, // order.takerAssetAmount, // order.makerFee, // order.takerFee, // order.expirationTimeSeconds, // order.salt, // keccak256(order.makerAssetData), // keccak256(order.takerAssetData) // )); assembly { // Calculate memory addresses that will be swapped out before hashing let pos1 := sub(order, 32) let pos2 := add(order, 320) let pos3 := add(order, 352) // Backup let temp1 := mload(pos1) let temp2 := mload(pos2) let temp3 := mload(pos3) // Hash in place mstore(pos1, schemaHash) mstore(pos2, makerAssetDataHash) mstore(pos3, takerAssetDataHash) result := keccak256(pos1, 416) // Restore mstore(pos1, temp1) mstore(pos2, temp2) mstore(pos3, temp3) } return result; } } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract LibFillResults is SafeMath { struct FillResults { uint256 makerAssetFilledAmount; // Total amount of makerAsset(s) filled. uint256 takerAssetFilledAmount; // Total amount of takerAsset(s) filled. uint256 makerFeePaid; // Total amount of ZRX paid by maker(s) to feeRecipient(s). uint256 takerFeePaid; // Total amount of ZRX paid by taker to feeRecipients(s). } struct MatchedFillResults { FillResults left; // Amounts filled and fees paid of left order. FillResults right; // Amounts filled and fees paid of right order. uint256 leftMakerAssetSpreadAmount; // Spread between price of left and right order, denominated in the left order's makerAsset, paid to taker. } /// @dev Adds properties of both FillResults instances. /// Modifies the first FillResults instance specified. /// @param totalFillResults Fill results instance that will be added onto. /// @param singleFillResults Fill results instance that will be added to totalFillResults. function addFillResults(FillResults memory totalFillResults, FillResults memory singleFillResults) internal pure { totalFillResults.makerAssetFilledAmount = safeAdd(totalFillResults.makerAssetFilledAmount, singleFillResults.makerAssetFilledAmount); totalFillResults.takerAssetFilledAmount = safeAdd(totalFillResults.takerAssetFilledAmount, singleFillResults.takerAssetFilledAmount); totalFillResults.makerFeePaid = safeAdd(totalFillResults.makerFeePaid, singleFillResults.makerFeePaid); totalFillResults.takerFeePaid = safeAdd(totalFillResults.takerFeePaid, singleFillResults.takerFeePaid); } } contract IExchangeCore { /// @dev Cancels all orders created by makerAddress with a salt less than or equal to the targetOrderEpoch /// and senderAddress equal to msg.sender (or null address if msg.sender == makerAddress). /// @param targetOrderEpoch Orders created with a salt less or equal to this value will be cancelled. function cancelOrdersUpTo(uint256 targetOrderEpoch) external; /// @dev Fills the input order. /// @param order Order struct containing order specifications. /// @param takerAssetFillAmount Desired amount of takerAsset to sell. /// @param signature Proof that order has been created by maker. /// @return Amounts filled and fees paid by maker and taker. function fillOrder( LibOrder.Order memory order, uint256 takerAssetFillAmount, bytes memory signature ) public returns (LibFillResults.FillResults memory fillResults); /// @dev After calling, the order can not be filled anymore. /// @param order Order struct containing order specifications. function cancelOrder(LibOrder.Order memory order) public; /// @dev Gets information about an order: status, hash, and amount filled. /// @param order Order to gather information on. /// @return OrderInfo Information about the order and its state. /// See LibOrder.OrderInfo for a complete description. function getOrderInfo(LibOrder.Order memory order) public view returns (LibOrder.OrderInfo memory orderInfo); } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract IMatchOrders { /// @dev Match two complementary orders that have a profitable spread. /// Each order is filled at their respective price point. However, the calculations are /// carried out as though the orders are both being filled at the right order's price point. /// The profit made by the left order goes to the taker (who matched the two orders). /// @param leftOrder First order to match. /// @param rightOrder Second order to match. /// @param leftSignature Proof that order was created by the left maker. /// @param rightSignature Proof that order was created by the right maker. /// @return matchedFillResults Amounts filled and fees paid by maker and taker of matched orders. function matchOrders( LibOrder.Order memory leftOrder, LibOrder.Order memory rightOrder, bytes memory leftSignature, bytes memory rightSignature ) public returns (LibFillResults.MatchedFillResults memory matchedFillResults); } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract ISignatureValidator { /// @dev Approves a hash on-chain using any valid signature type. /// After presigning a hash, the preSign signature type will become valid for that hash and signer. /// @param signerAddress Address that should have signed the given hash. /// @param signature Proof that the hash has been signed by signer. function preSign( bytes32 hash, address signerAddress, bytes signature ) external; /// @dev Approves/unnapproves a Validator contract to verify signatures on signer's behalf. /// @param validatorAddress Address of Validator contract. /// @param approval Approval or disapproval of Validator contract. function setSignatureValidatorApproval( address validatorAddress, bool approval ) external; /// @dev Verifies that a signature is valid. /// @param hash Message hash that is signed. /// @param signerAddress Address of signer. /// @param signature Proof of signing. /// @return Validity of order signature. function isValidSignature( bytes32 hash, address signerAddress, bytes memory signature ) public view returns (bool isValid); } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract ITransactions { /// @dev Executes an exchange method call in the context of signer. /// @param salt Arbitrary number to ensure uniqueness of transaction hash. /// @param signerAddress Address of transaction signer. /// @param data AbiV2 encoded calldata. /// @param signature Proof of signer transaction by signer. function executeTransaction( uint256 salt, address signerAddress, bytes data, bytes signature ) external; } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract IAssetProxyDispatcher { /// @dev Registers an asset proxy to its asset proxy id. /// Once an asset proxy is registered, it cannot be unregistered. /// @param assetProxy Address of new asset proxy to register. function registerAssetProxy(address assetProxy) external; /// @dev Gets an asset proxy. /// @param assetProxyId Id of the asset proxy. /// @return The asset proxy registered to assetProxyId. Returns 0x0 if no proxy is registered. function getAssetProxy(bytes4 assetProxyId) external view returns (address); } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract IWrapperFunctions { /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled. /// @param order LibOrder.Order struct containing order specifications. /// @param takerAssetFillAmount Desired amount of takerAsset to sell. /// @param signature Proof that order has been created by maker. function fillOrKillOrder( LibOrder.Order memory order, uint256 takerAssetFillAmount, bytes memory signature ) public returns (LibFillResults.FillResults memory fillResults); /// @dev Fills an order with specified parameters and ECDSA signature. /// Returns false if the transaction would otherwise revert. /// @param order LibOrder.Order struct containing order specifications. /// @param takerAssetFillAmount Desired amount of takerAsset to sell. /// @param signature Proof that order has been created by maker. /// @return Amounts filled and fees paid by maker and taker. function fillOrderNoThrow( LibOrder.Order memory order, uint256 takerAssetFillAmount, bytes memory signature ) public returns (LibFillResults.FillResults memory fillResults); /// @dev Synchronously executes multiple calls of fillOrder. /// @param orders Array of order specifications. /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. /// @param signatures Proofs that orders have been created by makers. /// @return Amounts filled and fees paid by makers and taker. function batchFillOrders( LibOrder.Order[] memory orders, uint256[] memory takerAssetFillAmounts, bytes[] memory signatures ) public returns (LibFillResults.FillResults memory totalFillResults); /// @dev Synchronously executes multiple calls of fillOrKill. /// @param orders Array of order specifications. /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. /// @param signatures Proofs that orders have been created by makers. /// @return Amounts filled and fees paid by makers and taker. function batchFillOrKillOrders( LibOrder.Order[] memory orders, uint256[] memory takerAssetFillAmounts, bytes[] memory signatures ) public returns (LibFillResults.FillResults memory totalFillResults); /// @dev Fills an order with specified parameters and ECDSA signature. /// Returns false if the transaction would otherwise revert. /// @param orders Array of order specifications. /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. /// @param signatures Proofs that orders have been created by makers. /// @return Amounts filled and fees paid by makers and taker. function batchFillOrdersNoThrow( LibOrder.Order[] memory orders, uint256[] memory takerAssetFillAmounts, bytes[] memory signatures ) public returns (LibFillResults.FillResults memory totalFillResults); /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker. /// @param orders Array of order specifications. /// @param takerAssetFillAmount Desired amount of takerAsset to sell. /// @param signatures Proofs that orders have been created by makers. /// @return Amounts filled and fees paid by makers and taker. function marketSellOrders( LibOrder.Order[] memory orders, uint256 takerAssetFillAmount, bytes[] memory signatures ) public returns (LibFillResults.FillResults memory totalFillResults); /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker. /// Returns false if the transaction would otherwise revert. /// @param orders Array of order specifications. /// @param takerAssetFillAmount Desired amount of takerAsset to sell. /// @param signatures Proofs that orders have been signed by makers. /// @return Amounts filled and fees paid by makers and taker. function marketSellOrdersNoThrow( LibOrder.Order[] memory orders, uint256 takerAssetFillAmount, bytes[] memory signatures ) public returns (LibFillResults.FillResults memory totalFillResults); /// @dev Synchronously executes multiple calls of fillOrder until total amount of makerAsset is bought by taker. /// @param orders Array of order specifications. /// @param makerAssetFillAmount Desired amount of makerAsset to buy. /// @param signatures Proofs that orders have been signed by makers. /// @return Amounts filled and fees paid by makers and taker. function marketBuyOrders( LibOrder.Order[] memory orders, uint256 makerAssetFillAmount, bytes[] memory signatures ) public returns (LibFillResults.FillResults memory totalFillResults); /// @dev Synchronously executes multiple fill orders in a single transaction until total amount is bought by taker. /// Returns false if the transaction would otherwise revert. /// @param orders Array of order specifications. /// @param makerAssetFillAmount Desired amount of makerAsset to buy. /// @param signatures Proofs that orders have been signed by makers. /// @return Amounts filled and fees paid by makers and taker. function marketBuyOrdersNoThrow( LibOrder.Order[] memory orders, uint256 makerAssetFillAmount, bytes[] memory signatures ) public returns (LibFillResults.FillResults memory totalFillResults); /// @dev Synchronously cancels multiple orders in a single transaction. /// @param orders Array of order specifications. function batchCancelOrders(LibOrder.Order[] memory orders) public; /// @dev Fetches information for all passed in orders /// @param orders Array of order specifications. /// @return Array of OrderInfo instances that correspond to each order. function getOrdersInfo(LibOrder.Order[] memory orders) public view returns (LibOrder.OrderInfo[] memory); } // solhint-disable no-empty-blocks contract IExchange is IExchangeCore, IMatchOrders, ISignatureValidator, ITransactions, IAssetProxyDispatcher, IWrapperFunctions {} /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract IERC20Token { // solhint-disable no-simple-event-func-name event Transfer( address indexed _from, address indexed _to, uint256 _value ); event Approval( address indexed _owner, address indexed _spender, uint256 _value ); /// @dev send `value` token to `to` from `msg.sender` /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return True if transfer was successful function transfer(address _to, uint256 _value) external returns (bool); /// @dev send `value` token to `to` from `from` on the condition it is approved by `from` /// @param _from The address of the sender /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return True if transfer was successful function transferFrom( address _from, address _to, uint256 _value ) external returns (bool); /// @dev `msg.sender` approves `_spender` to spend `_value` tokens /// @param _spender The address of the account able to transfer the tokens /// @param _value The amount of wei to be approved for transfer /// @return Always true if the call has enough gas to complete execution function approve(address _spender, uint256 _value) external returns (bool); /// @dev Query total supply of token /// @return Total supply of token function totalSupply() external view returns (uint256); /// @param _owner The address from which the balance will be retrieved /// @return Balance of owner function balanceOf(address _owner) external view returns (uint256); /// @param _owner The address of the account owning tokens /// @param _spender The address of the account able to transfer the tokens /// @return Amount of remaining tokens allowed to spent function allowance(address _owner, address _spender) external view returns (uint256); } contract IEtherToken is IERC20Token { function deposit() public payable; function withdraw(uint256 amount) public; } contract LibConstants { using LibBytes for bytes; bytes4 constant internal ERC20_DATA_ID = bytes4(keccak256("ERC20Token(address)")); bytes4 constant internal ERC721_DATA_ID = bytes4(keccak256("ERC721Token(address,uint256)")); uint256 constant internal MAX_UINT = 2**256 - 1; uint256 constant internal PERCENTAGE_DENOMINATOR = 10**18; uint256 constant internal MAX_FEE_PERCENTAGE = 5 * PERCENTAGE_DENOMINATOR / 100; // 5% uint256 constant internal MAX_WETH_FILL_PERCENTAGE = 95 * PERCENTAGE_DENOMINATOR / 100; // 95% // solhint-disable var-name-mixedcase IExchange internal EXCHANGE; IEtherToken internal ETHER_TOKEN; IERC20Token internal ZRX_TOKEN; bytes internal ZRX_ASSET_DATA; bytes internal WETH_ASSET_DATA; // solhint-enable var-name-mixedcase constructor ( address _exchange, bytes memory _zrxAssetData, bytes memory _wethAssetData ) public { EXCHANGE = IExchange(_exchange); ZRX_ASSET_DATA = _zrxAssetData; WETH_ASSET_DATA = _wethAssetData; address etherToken = _wethAssetData.readAddress(16); address zrxToken = _zrxAssetData.readAddress(16); ETHER_TOKEN = IEtherToken(etherToken); ZRX_TOKEN = IERC20Token(zrxToken); } } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract MWeth { /// @dev Converts message call's ETH value into WETH. function convertEthToWeth() internal; /// @dev Transfers feePercentage of WETH spent on primary orders to feeRecipient. /// Refunds any excess ETH to msg.sender. /// @param wethSoldExcludingFeeOrders Amount of WETH sold when filling primary orders. /// @param wethSoldForZrx Amount of WETH sold when purchasing ZRX required for primary order fees. /// @param feePercentage Percentage of WETH sold that will payed as fee to forwarding contract feeRecipient. /// @param feeRecipient Address that will receive ETH when orders are filled. function transferEthFeeAndRefund( uint256 wethSoldExcludingFeeOrders, uint256 wethSoldForZrx, uint256 feePercentage, address feeRecipient ) internal; } contract MixinWeth is LibMath, LibConstants, MWeth { /// @dev Default payabale function, this allows us to withdraw WETH function () public payable { require( msg.sender == address(ETHER_TOKEN), "DEFAULT_FUNCTION_WETH_CONTRACT_ONLY" ); } /// @dev Converts message call's ETH value into WETH. function convertEthToWeth() internal { require( msg.value > 0, "INVALID_MSG_VALUE" ); ETHER_TOKEN.deposit.value(msg.value)(); } /// @dev Transfers feePercentage of WETH spent on primary orders to feeRecipient. /// Refunds any excess ETH to msg.sender. /// @param wethSoldExcludingFeeOrders Amount of WETH sold when filling primary orders. /// @param wethSoldForZrx Amount of WETH sold when purchasing ZRX required for primary order fees. /// @param feePercentage Percentage of WETH sold that will payed as fee to forwarding contract feeRecipient. /// @param feeRecipient Address that will receive ETH when orders are filled. function transferEthFeeAndRefund( uint256 wethSoldExcludingFeeOrders, uint256 wethSoldForZrx, uint256 feePercentage, address feeRecipient ) internal { // Ensure feePercentage is less than 5%. require( feePercentage <= MAX_FEE_PERCENTAGE, "FEE_PERCENTAGE_TOO_LARGE" ); // Ensure that no extra WETH owned by this contract has been sold. uint256 wethSold = safeAdd(wethSoldExcludingFeeOrders, wethSoldForZrx); require( wethSold <= msg.value, "OVERSOLD_WETH" ); // Calculate amount of WETH that hasn't been sold. uint256 wethRemaining = safeSub(msg.value, wethSold); // Calculate ETH fee to pay to feeRecipient. uint256 ethFee = getPartialAmountFloor( feePercentage, PERCENTAGE_DENOMINATOR, wethSoldExcludingFeeOrders ); // Ensure fee is less than amount of WETH remaining. require( ethFee <= wethRemaining, "INSUFFICIENT_ETH_REMAINING" ); // Do nothing if no WETH remaining if (wethRemaining > 0) { // Convert remaining WETH to ETH ETHER_TOKEN.withdraw(wethRemaining); // Pay ETH to feeRecipient if (ethFee > 0) { feeRecipient.transfer(ethFee); } // Refund remaining ETH to msg.sender. uint256 ethRefund = safeSub(wethRemaining, ethFee); if (ethRefund > 0) { msg.sender.transfer(ethRefund); } } } } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract IAssets { /// @dev Withdraws assets from this contract. The contract requires a ZRX balance in order to /// function optimally, and this function allows the ZRX to be withdrawn by owner. It may also be /// used to withdraw assets that were accidentally sent to this contract. /// @param assetData Byte array encoded for the respective asset proxy. /// @param amount Amount of ERC20 token to withdraw. function withdrawAsset( bytes assetData, uint256 amount ) external; } contract MAssets is IAssets { /// @dev Transfers given amount of asset to sender. /// @param assetData Byte array encoded for the respective asset proxy. /// @param amount Amount of asset to transfer to sender. function transferAssetToSender( bytes memory assetData, uint256 amount ) internal; /// @dev Decodes ERC20 assetData and transfers given amount to sender. /// @param assetData Byte array encoded for the respective asset proxy. /// @param amount Amount of asset to transfer to sender. function transferERC20Token( bytes memory assetData, uint256 amount ) internal; /// @dev Decodes ERC721 assetData and transfers given amount to sender. /// @param assetData Byte array encoded for the respective asset proxy. /// @param amount Amount of asset to transfer to sender. function transferERC721Token( bytes memory assetData, uint256 amount ) internal; } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract MExchangeWrapper { /// @dev Fills the input order. /// Returns false if the transaction would otherwise revert. /// @param order Order struct containing order specifications. /// @param takerAssetFillAmount Desired amount of takerAsset to sell. /// @param signature Proof that order has been created by maker. /// @return Amounts filled and fees paid by maker and taker. function fillOrderNoThrow( LibOrder.Order memory order, uint256 takerAssetFillAmount, bytes memory signature ) internal returns (LibFillResults.FillResults memory fillResults); /// @dev Synchronously executes multiple calls of fillOrder until total amount of WETH has been sold by taker. /// Returns false if the transaction would otherwise revert. /// @param orders Array of order specifications. /// @param wethSellAmount Desired amount of WETH to sell. /// @param signatures Proofs that orders have been signed by makers. /// @return Amounts filled and fees paid by makers and taker. function marketSellWeth( LibOrder.Order[] memory orders, uint256 wethSellAmount, bytes[] memory signatures ) internal returns (LibFillResults.FillResults memory totalFillResults); /// @dev Synchronously executes multiple fill orders in a single transaction until total amount is bought by taker. /// Returns false if the transaction would otherwise revert. /// The asset being sold by taker must always be WETH. /// @param orders Array of order specifications. /// @param makerAssetFillAmount Desired amount of makerAsset to buy. /// @param signatures Proofs that orders have been signed by makers. /// @return Amounts filled and fees paid by makers and taker. function marketBuyExactAmountWithWeth( LibOrder.Order[] memory orders, uint256 makerAssetFillAmount, bytes[] memory signatures ) internal returns (LibFillResults.FillResults memory totalFillResults); /// @dev Buys zrxBuyAmount of ZRX fee tokens, taking into account ZRX fees for each order. This will guarantee /// that at least zrxBuyAmount of ZRX is purchased (sometimes slightly over due to rounding issues). /// It is possible that a request to buy 200 ZRX will require purchasing 202 ZRX /// as 2 ZRX is required to purchase the 200 ZRX fee tokens. This guarantees at least 200 ZRX for future purchases. /// The asset being sold by taker must always be WETH. /// @param orders Array of order specifications containing ZRX as makerAsset and WETH as takerAsset. /// @param zrxBuyAmount Desired amount of ZRX to buy. /// @param signatures Proofs that orders have been created by makers. /// @return totalFillResults Amounts filled and fees paid by maker and taker. function marketBuyExactZrxWithWeth( LibOrder.Order[] memory orders, uint256 zrxBuyAmount, bytes[] memory signatures ) internal returns (LibFillResults.FillResults memory totalFillResults); } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract IForwarderCore { /// @dev Purchases as much of orders' makerAssets as possible by selling up to 95% of transaction's ETH value. /// Any ZRX required to pay fees for primary orders will automatically be purchased by this contract. /// 5% of ETH value is reserved for paying fees to order feeRecipients (in ZRX) and forwarding contract feeRecipient (in ETH). /// Any ETH not spent will be refunded to sender. /// @param orders Array of order specifications used containing desired makerAsset and WETH as takerAsset. /// @param signatures Proofs that orders have been created by makers. /// @param feeOrders Array of order specifications containing ZRX as makerAsset and WETH as takerAsset. Used to purchase ZRX for primary order fees. /// @param feeSignatures Proofs that feeOrders have been created by makers. /// @param feePercentage Percentage of WETH sold that will payed as fee to forwarding contract feeRecipient. /// @param feeRecipient Address that will receive ETH when orders are filled. /// @return Amounts filled and fees paid by maker and taker for both sets of orders. function marketSellOrdersWithEth( LibOrder.Order[] memory orders, bytes[] memory signatures, LibOrder.Order[] memory feeOrders, bytes[] memory feeSignatures, uint256 feePercentage, address feeRecipient ) public payable returns ( LibFillResults.FillResults memory orderFillResults, LibFillResults.FillResults memory feeOrderFillResults ); /// @dev Attempt to purchase makerAssetFillAmount of makerAsset by selling ETH provided with transaction. /// Any ZRX required to pay fees for primary orders will automatically be purchased by this contract. /// Any ETH not spent will be refunded to sender. /// @param orders Array of order specifications used containing desired makerAsset and WETH as takerAsset. /// @param makerAssetFillAmount Desired amount of makerAsset to purchase. /// @param signatures Proofs that orders have been created by makers. /// @param feeOrders Array of order specifications containing ZRX as makerAsset and WETH as takerAsset. Used to purchase ZRX for primary order fees. /// @param feeSignatures Proofs that feeOrders have been created by makers. /// @param feePercentage Percentage of WETH sold that will payed as fee to forwarding contract feeRecipient. /// @param feeRecipient Address that will receive ETH when orders are filled. /// @return Amounts filled and fees paid by maker and taker for both sets of orders. function marketBuyOrdersWithEth( LibOrder.Order[] memory orders, uint256 makerAssetFillAmount, bytes[] memory signatures, LibOrder.Order[] memory feeOrders, bytes[] memory feeSignatures, uint256 feePercentage, address feeRecipient ) public payable returns ( LibFillResults.FillResults memory orderFillResults, LibFillResults.FillResults memory feeOrderFillResults ); } contract MixinForwarderCore is LibFillResults, LibMath, LibConstants, MWeth, MAssets, MExchangeWrapper, IForwarderCore { using LibBytes for bytes; /// @dev Constructor approves ERC20 proxy to transfer ZRX and WETH on this contract's behalf. constructor () public { address proxyAddress = EXCHANGE.getAssetProxy(ERC20_DATA_ID); require( proxyAddress != address(0), "UNREGISTERED_ASSET_PROXY" ); ETHER_TOKEN.approve(proxyAddress, MAX_UINT); ZRX_TOKEN.approve(proxyAddress, MAX_UINT); } /// @dev Purchases as much of orders' makerAssets as possible by selling up to 95% of transaction's ETH value. /// Any ZRX required to pay fees for primary orders will automatically be purchased by this contract. /// 5% of ETH value is reserved for paying fees to order feeRecipients (in ZRX) and forwarding contract feeRecipient (in ETH). /// Any ETH not spent will be refunded to sender. /// @param orders Array of order specifications used containing desired makerAsset and WETH as takerAsset. /// @param signatures Proofs that orders have been created by makers. /// @param feeOrders Array of order specifications containing ZRX as makerAsset and WETH as takerAsset. Used to purchase ZRX for primary order fees. /// @param feeSignatures Proofs that feeOrders have been created by makers. /// @param feePercentage Percentage of WETH sold that will payed as fee to forwarding contract feeRecipient. /// @param feeRecipient Address that will receive ETH when orders are filled. /// @return Amounts filled and fees paid by maker and taker for both sets of orders. function marketSellOrdersWithEth( LibOrder.Order[] memory orders, bytes[] memory signatures, LibOrder.Order[] memory feeOrders, bytes[] memory feeSignatures, uint256 feePercentage, address feeRecipient ) public payable returns ( FillResults memory orderFillResults, FillResults memory feeOrderFillResults ) { // Convert ETH to WETH. convertEthToWeth(); uint256 wethSellAmount; uint256 zrxBuyAmount; uint256 makerAssetAmountPurchased; if (orders[0].makerAssetData.equals(ZRX_ASSET_DATA)) { // Calculate amount of WETH that won't be spent on ETH fees. wethSellAmount = getPartialAmountFloor( PERCENTAGE_DENOMINATOR, safeAdd(PERCENTAGE_DENOMINATOR, feePercentage), msg.value ); // Market sell available WETH. // ZRX fees are paid with this contract's balance. orderFillResults = marketSellWeth( orders, wethSellAmount, signatures ); // The fee amount must be deducted from the amount transfered back to sender. makerAssetAmountPurchased = safeSub(orderFillResults.makerAssetFilledAmount, orderFillResults.takerFeePaid); } else { // 5% of WETH is reserved for filling feeOrders and paying feeRecipient. wethSellAmount = getPartialAmountFloor( MAX_WETH_FILL_PERCENTAGE, PERCENTAGE_DENOMINATOR, msg.value ); // Market sell 95% of WETH. // ZRX fees are payed with this contract's balance. orderFillResults = marketSellWeth( orders, wethSellAmount, signatures ); // Buy back all ZRX spent on fees. zrxBuyAmount = orderFillResults.takerFeePaid; feeOrderFillResults = marketBuyExactZrxWithWeth( feeOrders, zrxBuyAmount, feeSignatures ); makerAssetAmountPurchased = orderFillResults.makerAssetFilledAmount; } // Transfer feePercentage of total ETH spent on primary orders to feeRecipient. // Refund remaining ETH to msg.sender. transferEthFeeAndRefund( orderFillResults.takerAssetFilledAmount, feeOrderFillResults.takerAssetFilledAmount, feePercentage, feeRecipient ); // Transfer purchased assets to msg.sender. transferAssetToSender(orders[0].makerAssetData, makerAssetAmountPurchased); } /// @dev Attempt to purchase makerAssetFillAmount of makerAsset by selling ETH provided with transaction. /// Any ZRX required to pay fees for primary orders will automatically be purchased by this contract. /// Any ETH not spent will be refunded to sender. /// @param orders Array of order specifications used containing desired makerAsset and WETH as takerAsset. /// @param makerAssetFillAmount Desired amount of makerAsset to purchase. /// @param signatures Proofs that orders have been created by makers. /// @param feeOrders Array of order specifications containing ZRX as makerAsset and WETH as takerAsset. Used to purchase ZRX for primary order fees. /// @param feeSignatures Proofs that feeOrders have been created by makers. /// @param feePercentage Percentage of WETH sold that will payed as fee to forwarding contract feeRecipient. /// @param feeRecipient Address that will receive ETH when orders are filled. /// @return Amounts filled and fees paid by maker and taker for both sets of orders. function marketBuyOrdersWithEth( LibOrder.Order[] memory orders, uint256 makerAssetFillAmount, bytes[] memory signatures, LibOrder.Order[] memory feeOrders, bytes[] memory feeSignatures, uint256 feePercentage, address feeRecipient ) public payable returns ( FillResults memory orderFillResults, FillResults memory feeOrderFillResults ) { // Convert ETH to WETH. convertEthToWeth(); uint256 zrxBuyAmount; uint256 makerAssetAmountPurchased; if (orders[0].makerAssetData.equals(ZRX_ASSET_DATA)) { // If the makerAsset is ZRX, it is not necessary to pay fees out of this // contracts's ZRX balance because fees are factored into the price of the order. orderFillResults = marketBuyExactZrxWithWeth( orders, makerAssetFillAmount, signatures ); // The fee amount must be deducted from the amount transfered back to sender. makerAssetAmountPurchased = safeSub(orderFillResults.makerAssetFilledAmount, orderFillResults.takerFeePaid); } else { // Attemp to purchase desired amount of makerAsset. // ZRX fees are payed with this contract's balance. orderFillResults = marketBuyExactAmountWithWeth( orders, makerAssetFillAmount, signatures ); // Buy back all ZRX spent on fees. zrxBuyAmount = orderFillResults.takerFeePaid; feeOrderFillResults = marketBuyExactZrxWithWeth( feeOrders, zrxBuyAmount, feeSignatures ); makerAssetAmountPurchased = orderFillResults.makerAssetFilledAmount; } // Transfer feePercentage of total ETH spent on primary orders to feeRecipient. // Refund remaining ETH to msg.sender. transferEthFeeAndRefund( orderFillResults.takerAssetFilledAmount, feeOrderFillResults.takerAssetFilledAmount, feePercentage, feeRecipient ); // Transfer purchased assets to msg.sender. transferAssetToSender(orders[0].makerAssetData, makerAssetAmountPurchased); } } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; pragma solidity 0.4.24; pragma solidity 0.4.24; contract IOwnable { function transferOwnership(address newOwner) public; } contract Ownable is IOwnable { address public owner; constructor () public { owner = msg.sender; } modifier onlyOwner() { require( msg.sender == owner, "ONLY_CONTRACT_OWNER" ); _; } function transferOwnership(address newOwner) public onlyOwner { if (newOwner != address(0)) { owner = newOwner; } } } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract IERC721Token { /// @dev This emits when ownership of any NFT changes by any mechanism. /// This event emits when NFTs are created (`from` == 0) and destroyed /// (`to` == 0). Exception: during contract creation, any number of NFTs /// may be created and assigned without emitting Transfer. At the time of /// any transfer, the approved address for that NFT (if any) is reset to none. event Transfer( address indexed _from, address indexed _to, uint256 indexed _tokenId ); /// @dev This emits when the approved address for an NFT is changed or /// reaffirmed. The zero address indicates there is no approved address. /// When a Transfer event emits, this also indicates that the approved /// address for that NFT (if any) is reset to none. event Approval( address indexed _owner, address indexed _approved, uint256 indexed _tokenId ); /// @dev This emits when an operator is enabled or disabled for an owner. /// The operator can manage all NFTs of the owner. event ApprovalForAll( address indexed _owner, address indexed _operator, bool _approved ); /// @notice Transfers the ownership of an NFT from one address to another address /// @dev Throws unless `msg.sender` is the current owner, an authorized /// perator, or the approved address for this NFT. Throws if `_from` is /// not the current owner. Throws if `_to` is the zero address. Throws if /// `_tokenId` is not a valid NFT. When transfer is complete, this function /// checks if `_to` is a smart contract (code size > 0). If so, it calls /// `onERC721Received` on `_to` and throws if the return value is not /// `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`. /// @param _from The current owner of the NFT /// @param _to The new owner /// @param _tokenId The NFT to transfer /// @param _data Additional data with no specified format, sent in call to `_to` function safeTransferFrom( address _from, address _to, uint256 _tokenId, bytes _data ) external; /// @notice Transfers the ownership of an NFT from one address to another address /// @dev This works identically to the other function with an extra data parameter, /// except this function just sets data to "". /// @param _from The current owner of the NFT /// @param _to The new owner /// @param _tokenId The NFT to transfer function safeTransferFrom( address _from, address _to, uint256 _tokenId ) external; /// @notice Change or reaffirm the approved address for an NFT /// @dev The zero address indicates there is no approved address. /// Throws unless `msg.sender` is the current NFT owner, or an authorized /// operator of the current owner. /// @param _approved The new approved NFT controller /// @param _tokenId The NFT to approve function approve(address _approved, uint256 _tokenId) external; /// @notice Enable or disable approval for a third party ("operator") to manage /// all of `msg.sender`'s assets /// @dev Emits the ApprovalForAll event. The contract MUST allow /// multiple operators per owner. /// @param _operator Address to add to the set of authorized operators /// @param _approved True if the operator is approved, false to revoke approval function setApprovalForAll(address _operator, bool _approved) external; /// @notice Count all NFTs assigned to an owner /// @dev NFTs assigned to the zero address are considered invalid, and this /// function throws for queries about the zero address. /// @param _owner An address for whom to query the balance /// @return The number of NFTs owned by `_owner`, possibly zero function balanceOf(address _owner) external view returns (uint256); /// @notice Transfer ownership of an NFT -- THE CALLER IS RESPONSIBLE /// TO CONFIRM THAT `_to` IS CAPABLE OF RECEIVING NFTS OR ELSE /// THEY MAY BE PERMANENTLY LOST /// @dev Throws unless `msg.sender` is the current owner, an authorized /// operator, or the approved address for this NFT. Throws if `_from` is /// not the current owner. Throws if `_to` is the zero address. Throws if /// `_tokenId` is not a valid NFT. /// @param _from The current owner of the NFT /// @param _to The new owner /// @param _tokenId The NFT to transfer function transferFrom( address _from, address _to, uint256 _tokenId ) public; /// @notice Find the owner of an NFT /// @dev NFTs assigned to zero address are considered invalid, and queries /// about them do throw. /// @param _tokenId The identifier for an NFT /// @return The address of the owner of the NFT function ownerOf(uint256 _tokenId) public view returns (address); /// @notice Get the approved address for a single NFT /// @dev Throws if `_tokenId` is not a valid NFT. /// @param _tokenId The NFT to find the approved address for /// @return The approved address for this NFT, or the zero address if there is none function getApproved(uint256 _tokenId) public view returns (address); /// @notice Query if an address is an authorized operator for another address /// @param _owner The address that owns the NFTs /// @param _operator The address that acts on behalf of the owner /// @return True if `_operator` is an approved operator for `_owner`, false otherwise function isApprovedForAll(address _owner, address _operator) public view returns (bool); } contract MixinAssets is Ownable, LibConstants, MAssets { using LibBytes for bytes; bytes4 constant internal ERC20_TRANSFER_SELECTOR = bytes4(keccak256("transfer(address,uint256)")); /// @dev Withdraws assets from this contract. The contract requires a ZRX balance in order to /// function optimally, and this function allows the ZRX to be withdrawn by owner. It may also be /// used to withdraw assets that were accidentally sent to this contract. /// @param assetData Byte array encoded for the respective asset proxy. /// @param amount Amount of ERC20 token to withdraw. function withdrawAsset( bytes assetData, uint256 amount ) external onlyOwner { transferAssetToSender(assetData, amount); } /// @dev Transfers given amount of asset to sender. /// @param assetData Byte array encoded for the respective asset proxy. /// @param amount Amount of asset to transfer to sender. function transferAssetToSender( bytes memory assetData, uint256 amount ) internal { bytes4 proxyId = assetData.readBytes4(0); if (proxyId == ERC20_DATA_ID) { transferERC20Token(assetData, amount); } else if (proxyId == ERC721_DATA_ID) { transferERC721Token(assetData, amount); } else { revert("UNSUPPORTED_ASSET_PROXY"); } } /// @dev Decodes ERC20 assetData and transfers given amount to sender. /// @param assetData Byte array encoded for the respective asset proxy. /// @param amount Amount of asset to transfer to sender. function transferERC20Token( bytes memory assetData, uint256 amount ) internal { address token = assetData.readAddress(16); // Transfer tokens. // We do a raw call so we can check the success separate // from the return data. bool success = token.call(abi.encodeWithSelector( ERC20_TRANSFER_SELECTOR, msg.sender, amount )); require( success, "TRANSFER_FAILED" ); // Check return data. // If there is no return data, we assume the token incorrectly // does not return a bool. In this case we expect it to revert // on failure, which was handled above. // If the token does return data, we require that it is a single // value that evaluates to true. assembly { if returndatasize { success := 0 if eq(returndatasize, 32) { // First 64 bytes of memory are reserved scratch space returndatacopy(0, 0, 32) success := mload(0) } } } require( success, "TRANSFER_FAILED" ); } /// @dev Decodes ERC721 assetData and transfers given amount to sender. /// @param assetData Byte array encoded for the respective asset proxy. /// @param amount Amount of asset to transfer to sender. function transferERC721Token( bytes memory assetData, uint256 amount ) internal { require( amount == 1, "INVALID_AMOUNT" ); // Decode asset data. address token = assetData.readAddress(16); uint256 tokenId = assetData.readUint256(36); // Perform transfer. IERC721Token(token).transferFrom( address(this), msg.sender, tokenId ); } } /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; /* Copyright 2018 ZeroEx Intl. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ pragma solidity 0.4.24; contract LibAbiEncoder { /// @dev ABI encodes calldata for `fillOrder`. /// @param order Order struct containing order specifications. /// @param takerAssetFillAmount Desired amount of takerAsset to sell. /// @param signature Proof that order has been created by maker. /// @return ABI encoded calldata for `fillOrder`. function abiEncodeFillOrder( LibOrder.Order memory order, uint256 takerAssetFillAmount, bytes memory signature ) internal pure returns (bytes memory fillOrderCalldata) { // We need to call MExchangeCore.fillOrder using a delegatecall in // assembly so that we can intercept a call that throws. For this, we // need the input encoded in memory in the Ethereum ABIv2 format [1]. // | Area | Offset | Length | Contents | // | -------- |--------|---------|-------------------------------------------- | // | Header | 0x00 | 4 | function selector | // | Params | | 3 * 32 | function parameters: | // | | 0x00 | | 1. offset to order (*) | // | | 0x20 | | 2. takerAssetFillAmount | // | | 0x40 | | 3. offset to signature (*) | // | Data | | 12 * 32 | order: | // | | 0x000 | | 1. senderAddress | // | | 0x020 | | 2. makerAddress | // | | 0x040 | | 3. takerAddress | // | | 0x060 | | 4. feeRecipientAddress | // | | 0x080 | | 5. makerAssetAmount | // | | 0x0A0 | | 6. takerAssetAmount | // | | 0x0C0 | | 7. makerFeeAmount | // | | 0x0E0 | | 8. takerFeeAmount | // | | 0x100 | | 9. expirationTimeSeconds | // | | 0x120 | | 10. salt | // | | 0x140 | | 11. Offset to makerAssetData (*) | // | | 0x160 | | 12. Offset to takerAssetData (*) | // | | 0x180 | 32 | makerAssetData Length | // | | 0x1A0 | ** | makerAssetData Contents | // | | 0x1C0 | 32 | takerAssetData Length | // | | 0x1E0 | ** | takerAssetData Contents | // | | 0x200 | 32 | signature Length | // | | 0x220 | ** | signature Contents | // * Offsets are calculated from the beginning of the current area: Header, Params, Data: // An offset stored in the Params area is calculated from the beginning of the Params section. // An offset stored in the Data area is calculated from the beginning of the Data section. // ** The length of dynamic array contents are stored in the field immediately preceeding the contents. // [1]: https://solidity.readthedocs.io/en/develop/abi-spec.html assembly { // Areas below may use the following variables: // 1. <area>Start -- Start of this area in memory // 2. <area>End -- End of this area in memory. This value may // be precomputed (before writing contents), // or it may be computed as contents are written. // 3. <area>Offset -- Current offset into area. If an area's End // is precomputed, this variable tracks the // offsets of contents as they are written. /////// Setup Header Area /////// // Load free memory pointer fillOrderCalldata := mload(0x40) // bytes4(keccak256("fillOrder((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),uint256,bytes)")) // = 0xb4be83d5 // Leave 0x20 bytes to store the length mstore(add(fillOrderCalldata, 0x20), 0xb4be83d500000000000000000000000000000000000000000000000000000000) let headerAreaEnd := add(fillOrderCalldata, 0x24) /////// Setup Params Area /////// // This area is preallocated and written to later. // This is because we need to fill in offsets that have not yet been calculated. let paramsAreaStart := headerAreaEnd let paramsAreaEnd := add(paramsAreaStart, 0x60) let paramsAreaOffset := paramsAreaStart /////// Setup Data Area /////// let dataAreaStart := paramsAreaEnd let dataAreaEnd := dataAreaStart // Offset from the source data we're reading from let sourceOffset := order // arrayLenBytes and arrayLenWords track the length of a dynamically-allocated bytes array. let arrayLenBytes := 0 let arrayLenWords := 0 /////// Write order Struct /////// // Write memory location of Order, relative to the start of the // parameter list, then increment the paramsAreaOffset respectively. mstore(paramsAreaOffset, sub(dataAreaEnd, paramsAreaStart)) paramsAreaOffset := add(paramsAreaOffset, 0x20) // Write values for each field in the order // It would be nice to use a loop, but we save on gas by writing // the stores sequentially. mstore(dataAreaEnd, mload(sourceOffset)) // makerAddress mstore(add(dataAreaEnd, 0x20), mload(add(sourceOffset, 0x20))) // takerAddress mstore(add(dataAreaEnd, 0x40), mload(add(sourceOffset, 0x40))) // feeRecipientAddress mstore(add(dataAreaEnd, 0x60), mload(add(sourceOffset, 0x60))) // senderAddress mstore(add(dataAreaEnd, 0x80), mload(add(sourceOffset, 0x80))) // makerAssetAmount mstore(add(dataAreaEnd, 0xA0), mload(add(sourceOffset, 0xA0))) // takerAssetAmount mstore(add(dataAreaEnd, 0xC0), mload(add(sourceOffset, 0xC0))) // makerFeeAmount mstore(add(dataAreaEnd, 0xE0), mload(add(sourceOffset, 0xE0))) // takerFeeAmount mstore(add(dataAreaEnd, 0x100), mload(add(sourceOffset, 0x100))) // expirationTimeSeconds mstore(add(dataAreaEnd, 0x120), mload(add(sourceOffset, 0x120))) // salt mstore(add(dataAreaEnd, 0x140), mload(add(sourceOffset, 0x140))) // Offset to makerAssetData mstore(add(dataAreaEnd, 0x160), mload(add(sourceOffset, 0x160))) // Offset to takerAssetData dataAreaEnd := add(dataAreaEnd, 0x180) sourceOffset := add(sourceOffset, 0x180) // Write offset to <order.makerAssetData> mstore(add(dataAreaStart, mul(10, 0x20)), sub(dataAreaEnd, dataAreaStart)) // Calculate length of <order.makerAssetData> sourceOffset := mload(add(order, 0x140)) // makerAssetData arrayLenBytes := mload(sourceOffset) sourceOffset := add(sourceOffset, 0x20) arrayLenWords := div(add(arrayLenBytes, 0x1F), 0x20) // Write length of <order.makerAssetData> mstore(dataAreaEnd, arrayLenBytes) dataAreaEnd := add(dataAreaEnd, 0x20) // Write contents of <order.makerAssetData> for {let i := 0} lt(i, arrayLenWords) {i := add(i, 1)} { mstore(dataAreaEnd, mload(sourceOffset)) dataAreaEnd := add(dataAreaEnd, 0x20) sourceOffset := add(sourceOffset, 0x20) } // Write offset to <order.takerAssetData> mstore(add(dataAreaStart, mul(11, 0x20)), sub(dataAreaEnd, dataAreaStart)) // Calculate length of <order.takerAssetData> sourceOffset := mload(add(order, 0x160)) // takerAssetData arrayLenBytes := mload(sourceOffset) sourceOffset := add(sourceOffset, 0x20) arrayLenWords := div(add(arrayLenBytes, 0x1F), 0x20) // Write length of <order.takerAssetData> mstore(dataAreaEnd, arrayLenBytes) dataAreaEnd := add(dataAreaEnd, 0x20) // Write contents of <order.takerAssetData> for {let i := 0} lt(i, arrayLenWords) {i := add(i, 1)} { mstore(dataAreaEnd, mload(sourceOffset)) dataAreaEnd := add(dataAreaEnd, 0x20) sourceOffset := add(sourceOffset, 0x20) } /////// Write takerAssetFillAmount /////// mstore(paramsAreaOffset, takerAssetFillAmount) paramsAreaOffset := add(paramsAreaOffset, 0x20) /////// Write signature /////// // Write offset to paramsArea mstore(paramsAreaOffset, sub(dataAreaEnd, paramsAreaStart)) // Calculate length of signature sourceOffset := signature arrayLenBytes := mload(sourceOffset) sourceOffset := add(sourceOffset, 0x20) arrayLenWords := div(add(arrayLenBytes, 0x1F), 0x20) // Write length of signature mstore(dataAreaEnd, arrayLenBytes) dataAreaEnd := add(dataAreaEnd, 0x20) // Write contents of signature for {let i := 0} lt(i, arrayLenWords) {i := add(i, 1)} { mstore(dataAreaEnd, mload(sourceOffset)) dataAreaEnd := add(dataAreaEnd, 0x20) sourceOffset := add(sourceOffset, 0x20) } // Set length of calldata mstore(fillOrderCalldata, sub(dataAreaEnd, add(fillOrderCalldata, 0x20))) // Increment free memory pointer mstore(0x40, dataAreaEnd) } return fillOrderCalldata; } } contract MixinExchangeWrapper is LibAbiEncoder, LibFillResults, LibMath, LibConstants, MExchangeWrapper { /// @dev Fills the input order. /// Returns false if the transaction would otherwise revert. /// @param order Order struct containing order specifications. /// @param takerAssetFillAmount Desired amount of takerAsset to sell. /// @param signature Proof that order has been created by maker. /// @return Amounts filled and fees paid by maker and taker. function fillOrderNoThrow( LibOrder.Order memory order, uint256 takerAssetFillAmount, bytes memory signature ) internal returns (FillResults memory fillResults) { // ABI encode calldata for `fillOrder` bytes memory fillOrderCalldata = abiEncodeFillOrder( order, takerAssetFillAmount, signature ); address exchange = address(EXCHANGE); // Call `fillOrder` and handle any exceptions gracefully assembly { let success := call( gas, // forward all gas exchange, // call address of Exchange contract 0, // transfer 0 wei add(fillOrderCalldata, 32), // pointer to start of input (skip array length in first 32 bytes) mload(fillOrderCalldata), // length of input fillOrderCalldata, // write output over input 128 // output size is 128 bytes ) if success { mstore(fillResults, mload(fillOrderCalldata)) mstore(add(fillResults, 32), mload(add(fillOrderCalldata, 32))) mstore(add(fillResults, 64), mload(add(fillOrderCalldata, 64))) mstore(add(fillResults, 96), mload(add(fillOrderCalldata, 96))) } } // fillResults values will be 0 by default if call was unsuccessful return fillResults; } /// @dev Synchronously executes multiple calls of fillOrder until total amount of WETH has been sold by taker. /// Returns false if the transaction would otherwise revert. /// @param orders Array of order specifications. /// @param wethSellAmount Desired amount of WETH to sell. /// @param signatures Proofs that orders have been signed by makers. /// @return Amounts filled and fees paid by makers and taker. function marketSellWeth( LibOrder.Order[] memory orders, uint256 wethSellAmount, bytes[] memory signatures ) internal returns (FillResults memory totalFillResults) { bytes memory makerAssetData = orders[0].makerAssetData; bytes memory wethAssetData = WETH_ASSET_DATA; uint256 ordersLength = orders.length; for (uint256 i = 0; i != ordersLength; i++) { // We assume that asset being bought by taker is the same for each order. // We assume that asset being sold by taker is WETH for each order. orders[i].makerAssetData = makerAssetData; orders[i].takerAssetData = wethAssetData; // Calculate the remaining amount of WETH to sell uint256 remainingTakerAssetFillAmount = safeSub(wethSellAmount, totalFillResults.takerAssetFilledAmount); // Attempt to sell the remaining amount of WETH FillResults memory singleFillResults = fillOrderNoThrow( orders[i], remainingTakerAssetFillAmount, signatures[i] ); // Update amounts filled and fees paid by maker and taker addFillResults(totalFillResults, singleFillResults); // Stop execution if the entire amount of takerAsset has been sold if (totalFillResults.takerAssetFilledAmount >= wethSellAmount) { break; } } return totalFillResults; } /// @dev Synchronously executes multiple fill orders in a single transaction until total amount is bought by taker. /// Returns false if the transaction would otherwise revert. /// The asset being sold by taker must always be WETH. /// @param orders Array of order specifications. /// @param makerAssetFillAmount Desired amount of makerAsset to buy. /// @param signatures Proofs that orders have been signed by makers. /// @return Amounts filled and fees paid by makers and taker. function marketBuyExactAmountWithWeth( LibOrder.Order[] memory orders, uint256 makerAssetFillAmount, bytes[] memory signatures ) internal returns (FillResults memory totalFillResults) { bytes memory makerAssetData = orders[0].makerAssetData; bytes memory wethAssetData = WETH_ASSET_DATA; uint256 ordersLength = orders.length; for (uint256 i = 0; i != ordersLength; i++) { // We assume that asset being bought by taker is the same for each order. // We assume that asset being sold by taker is WETH for each order. orders[i].makerAssetData = makerAssetData; orders[i].takerAssetData = wethAssetData; // Calculate the remaining amount of makerAsset to buy uint256 remainingMakerAssetFillAmount = safeSub(makerAssetFillAmount, totalFillResults.makerAssetFilledAmount); // Convert the remaining amount of makerAsset to buy into remaining amount // of takerAsset to sell, assuming entire amount can be sold in the current order uint256 remainingTakerAssetFillAmount = getPartialAmountFloor( orders[i].takerAssetAmount, orders[i].makerAssetAmount, remainingMakerAssetFillAmount ); // Attempt to sell the remaining amount of takerAsset FillResults memory singleFillResults = fillOrderNoThrow( orders[i], remainingTakerAssetFillAmount, signatures[i] ); // Update amounts filled and fees paid by maker and taker addFillResults(totalFillResults, singleFillResults); // Stop execution if the entire amount of makerAsset has been bought uint256 makerAssetFilledAmount = totalFillResults.makerAssetFilledAmount; if (makerAssetFilledAmount >= makerAssetFillAmount) { break; } } require( makerAssetFilledAmount >= makerAssetFillAmount, "COMPLETE_FILL_FAILED" ); return totalFillResults; } /// @dev Buys zrxBuyAmount of ZRX fee tokens, taking into account ZRX fees for each order. This will guarantee /// that at least zrxBuyAmount of ZRX is purchased (sometimes slightly over due to rounding issues). /// It is possible that a request to buy 200 ZRX will require purchasing 202 ZRX /// as 2 ZRX is required to purchase the 200 ZRX fee tokens. This guarantees at least 200 ZRX for future purchases. /// The asset being sold by taker must always be WETH. /// @param orders Array of order specifications containing ZRX as makerAsset and WETH as takerAsset. /// @param zrxBuyAmount Desired amount of ZRX to buy. /// @param signatures Proofs that orders have been created by makers. /// @return totalFillResults Amounts filled and fees paid by maker and taker. function marketBuyExactZrxWithWeth( LibOrder.Order[] memory orders, uint256 zrxBuyAmount, bytes[] memory signatures ) internal returns (FillResults memory totalFillResults) { // Do nothing if zrxBuyAmount == 0 if (zrxBuyAmount == 0) { return totalFillResults; } bytes memory zrxAssetData = ZRX_ASSET_DATA; bytes memory wethAssetData = WETH_ASSET_DATA; uint256 zrxPurchased = 0; uint256 ordersLength = orders.length; for (uint256 i = 0; i != ordersLength; i++) { // All of these are ZRX/WETH, so we can drop the respective assetData from calldata. orders[i].makerAssetData = zrxAssetData; orders[i].takerAssetData = wethAssetData; // Calculate the remaining amount of ZRX to buy. uint256 remainingZrxBuyAmount = safeSub(zrxBuyAmount, zrxPurchased); // Convert the remaining amount of ZRX to buy into remaining amount // of WETH to sell, assuming entire amount can be sold in the current order. uint256 remainingWethSellAmount = getPartialAmountFloor( orders[i].takerAssetAmount, safeSub(orders[i].makerAssetAmount, orders[i].takerFee), // our exchange rate after fees remainingZrxBuyAmount ); // Attempt to sell the remaining amount of WETH. FillResults memory singleFillResult = fillOrderNoThrow( orders[i], safeAdd(remainingWethSellAmount, 1), // we add 1 wei to the fill amount to make up for rounding errors signatures[i] ); // Update amounts filled and fees paid by maker and taker. addFillResults(totalFillResults, singleFillResult); zrxPurchased = safeSub(totalFillResults.makerAssetFilledAmount, totalFillResults.takerFeePaid); // Stop execution if the entire amount of ZRX has been bought. if (zrxPurchased >= zrxBuyAmount) { break; } } require( zrxPurchased >= zrxBuyAmount, "COMPLETE_FILL_FAILED" ); return totalFillResults; } } // solhint-disable no-empty-blocks contract Forwarder is LibConstants, MixinWeth, MixinAssets, MixinExchangeWrapper, MixinForwarderCore { constructor ( address _exchange, bytes memory _zrxAssetData, bytes memory _wethAssetData ) public LibConstants( _exchange, _zrxAssetData, _wethAssetData ) MixinForwarderCore() {} }
Contract Security Audit
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[{"constant":false,"inputs":[{"components":[{"name":"makerAddress","type":"address"},{"name":"takerAddress","type":"address"},{"name":"feeRecipientAddress","type":"address"},{"name":"senderAddress","type":"address"},{"name":"makerAssetAmount","type":"uint256"},{"name":"takerAssetAmount","type":"uint256"},{"name":"makerFee","type":"uint256"},{"name":"takerFee","type":"uint256"},{"name":"expirationTimeSeconds","type":"uint256"},{"name":"salt","type":"uint256"},{"name":"makerAssetData","type":"bytes"},{"name":"takerAssetData","type":"bytes"}],"name":"orders","type":"tuple[]"},{"name":"makerAssetFillAmount","type":"uint256"},{"name":"signatures","type":"bytes[]"},{"components":[{"name":"makerAddress","type":"address"},{"name":"takerAddress","type":"address"},{"name":"feeRecipientAddress","type":"address"},{"name":"senderAddress","type":"address"},{"name":"makerAssetAmount","type":"uint256"},{"name":"takerAssetAmount","type":"uint256"},{"name":"makerFee","type":"uint256"},{"name":"takerFee","type":"uint256"},{"name":"expirationTimeSeconds","type":"uint256"},{"name":"salt","type":"uint256"},{"name":"makerAssetData","type":"bytes"},{"name":"takerAssetData","type":"bytes"}],"name":"feeOrders","type":"tuple[]"},{"name":"feeSignatures","type":"bytes[]"},{"name":"feePercentage","type":"uint256"},{"name":"feeRecipient","type":"address"}],"name":"marketBuyOrdersWithEth","outputs":[{"components":[{"name":"makerAssetFilledAmount","type":"uint256"},{"name":"takerAssetFilledAmount","type":"uint256"},{"name":"makerFeePaid","type":"uint256"},{"name":"takerFeePaid","type":"uint256"}],"name":"orderFillResults","type":"tuple"},{"components":[{"name":"makerAssetFilledAmount","type":"uint256"},{"name":"takerAssetFilledAmount","type":"uint256"},{"name":"makerFeePaid","type":"uint256"},{"name":"takerFeePaid","type":"uint256"}],"name":"feeOrderFillResults","type":"tuple"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"assetData","type":"bytes"},{"name":"amount","type":"uint256"}],"name":"withdrawAsset","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"components":[{"name":"makerAddress","type":"address"},{"name":"takerAddress","type":"address"},{"name":"feeRecipientAddress","type":"address"},{"name":"senderAddress","type":"address"},{"name":"makerAssetAmount","type":"uint256"},{"name":"takerAssetAmount","type":"uint256"},{"name":"makerFee","type":"uint256"},{"name":"takerFee","type":"uint256"},{"name":"expirationTimeSeconds","type":"uint256"},{"name":"salt","type":"uint256"},{"name":"makerAssetData","type":"bytes"},{"name":"takerAssetData","type":"bytes"}],"name":"orders","type":"tuple[]"},{"name":"signatures","type":"bytes[]"},{"components":[{"name":"makerAddress","type":"address"},{"name":"takerAddress","type":"address"},{"name":"feeRecipientAddress","type":"address"},{"name":"senderAddress","type":"address"},{"name":"makerAssetAmount","type":"uint256"},{"name":"takerAssetAmount","type":"uint256"},{"name":"makerFee","type":"uint256"},{"name":"takerFee","type":"uint256"},{"name":"expirationTimeSeconds","type":"uint256"},{"name":"salt","type":"uint256"},{"name":"makerAssetData","type":"bytes"},{"name":"takerAssetData","type":"bytes"}],"name":"feeOrders","type":"tuple[]"},{"name":"feeSignatures","type":"bytes[]"},{"name":"feePercentage","type":"uint256"},{"name":"feeRecipient","type":"address"}],"name":"marketSellOrdersWithEth","outputs":[{"components":[{"name":"makerAssetFilledAmount","type":"uint256"},{"name":"takerAssetFilledAmount","type":"uint256"},{"name":"makerFeePaid","type":"uint256"},{"name":"takerFeePaid","type":"uint256"}],"name":"orderFillResults","type":"tuple"},{"components":[{"name":"makerAssetFilledAmount","type":"uint256"},{"name":"takerAssetFilledAmount","type":"uint256"},{"name":"makerFeePaid","type":"uint256"},{"name":"takerFeePaid","type":"uint256"}],"name":"feeOrderFillResults","type":"tuple"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_exchange","type":"address"},{"name":"_zrxAssetData","type":"bytes"},{"name":"_wethAssetData","type":"bytes"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"}]
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Swarm Source
bzzr://185af4a5e8525b0c20983bf22c09773a1cab3f704716cba4c8da3b112601cd66
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Multichain Portfolio | 26 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.