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Diffstat (limited to 'contracts/utils')
19 files changed, 2241 insertions, 0 deletions
diff --git a/contracts/utils/.solhint.json b/contracts/utils/.solhint.json new file mode 100644 index 000000000..076afe9f3 --- /dev/null +++ b/contracts/utils/.solhint.json @@ -0,0 +1,20 @@ +{ + "extends": "default", + "rules": { + "avoid-low-level-calls": false, + "avoid-tx-origin": "warn", + "bracket-align": false, + "code-complexity": false, + "const-name-snakecase": "error", + "expression-indent": "error", + "function-max-lines": false, + "func-order": "error", + "indent": ["error", 4], + "max-line-length": ["warn", 160], + "no-inline-assembly": false, + "quotes": ["error", "double"], + "separate-by-one-line-in-contract": "error", + "space-after-comma": "error", + "statement-indent": "error" + } +} diff --git a/contracts/utils/README.md b/contracts/utils/README.md new file mode 100644 index 000000000..e7c7b49ff --- /dev/null +++ b/contracts/utils/README.md @@ -0,0 +1,70 @@ +## Contracts utils + +Smart contracts utils used in the 0x protocol. + +## Usage + +Contracts can be found in the [contracts](./contracts) directory. The contents of this directory are broken down into the following subdirectories: + +* [utils](./contracts/utils) + * This directory contains libraries and utils. +* [test](./contracts/test) + * This directory contains mocks and other contracts that are used solely for testing contracts within the other directories. + +## Contributing + +We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository. + +For proposals regarding the 0x protocol's smart contract architecture, message format, or additional functionality, go to the [0x Improvement Proposals (ZEIPs)](https://github.com/0xProject/ZEIPs) repository and follow the contribution guidelines provided therein. + +Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started. + +### Install Dependencies + +If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them: + +```bash +yarn config set workspaces-experimental true +``` + +Then install dependencies + +```bash +yarn install +``` + +### Build + +To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory: + +```bash +PKG=@0x/contracts-utils yarn build +``` + +Or continuously rebuild on change: + +```bash +PKG=@0x/contracts-utils yarn watch +``` + +### Clean + +```bash +yarn clean +``` + +### Lint + +```bash +yarn lint +``` + +### Run Tests + +```bash +yarn test +``` + +#### Testing options + +Contracts testing options like coverage, profiling, revert traces or backing node choosing - are described [here](../TESTING.md). diff --git a/contracts/utils/compiler.json b/contracts/utils/compiler.json new file mode 100644 index 000000000..1524c1eaa --- /dev/null +++ b/contracts/utils/compiler.json @@ -0,0 +1,22 @@ +{ + "artifactsDir": "./generated-artifacts", + "contractsDir": "./contracts", + "compilerSettings": { + "optimizer": { + "enabled": true, + "runs": 1000000 + }, + "outputSelection": { + "*": { + "*": [ + "abi", + "evm.bytecode.object", + "evm.bytecode.sourceMap", + "evm.deployedBytecode.object", + "evm.deployedBytecode.sourceMap" + ] + } + } + }, + "contracts": ["TestConstants", "TestLibBytes", "LibBytes", "Ownable", "IOwnable", "ReentrancyGuard", "SafeMath"] +} diff --git a/contracts/utils/contracts/test/TestConstants/TestConstants.sol b/contracts/utils/contracts/test/TestConstants/TestConstants.sol new file mode 100644 index 000000000..3c852173b --- /dev/null +++ b/contracts/utils/contracts/test/TestConstants/TestConstants.sol @@ -0,0 +1,57 @@ +/* + + 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; + +import "@0x/contracts-utils/contracts/utils/LibBytes/LibBytes.sol"; + + +// solhint-disable max-line-length +contract TestConstants { + + using LibBytes for bytes; + + bytes4 constant internal ERC20_PROXY_ID = bytes4(keccak256("ERC20Token(address)")); + + address constant internal KOVAN_ZRX_ADDRESS = 0x6Ff6C0Ff1d68b964901F986d4C9FA3ac68346570; + bytes constant internal KOVAN_ZRX_ASSET_DATA = "\xf4\x72\x61\xb0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x6f\xf6\xc0\xff\x1d\x68\xb9\x64\x90\x1f\x98\x6d\x4c\x9f\xa3\xac\x68\x34\x65\x70"; + + address constant internal MAINNET_ZRX_ADDRESS = 0xE41d2489571d322189246DaFA5ebDe1F4699F498; + bytes constant public MAINNET_ZRX_ASSET_DATA = "\xf4\x72\x61\xb0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe4\x1d\x24\x89\x57\x1d\x32\x21\x89\x24\x6d\xaf\xa5\xeb\xde\x1f\x46\x99\xf4\x98"; + + function assertValidZrxAssetData() + public + pure + returns (bool) + { + bytes memory kovanZrxAssetData = abi.encodeWithSelector(ERC20_PROXY_ID, KOVAN_ZRX_ADDRESS); + require( + kovanZrxAssetData.equals(KOVAN_ZRX_ASSET_DATA), + "INVALID_KOVAN_ZRX_ASSET_DATA" + ); + + bytes memory mainetZrxAssetData = abi.encodeWithSelector(ERC20_PROXY_ID, MAINNET_ZRX_ADDRESS); + require( + mainetZrxAssetData.equals(MAINNET_ZRX_ASSET_DATA), + "INVALID_MAINNET_ZRX_ASSET_DATA" + ); + + return true; + } +} +// solhint-enable max-line-length
\ No newline at end of file diff --git a/contracts/utils/contracts/test/TestLibBytes/TestLibBytes.sol b/contracts/utils/contracts/test/TestLibBytes/TestLibBytes.sol new file mode 100644 index 000000000..444a3e717 --- /dev/null +++ b/contracts/utils/contracts/test/TestLibBytes/TestLibBytes.sol @@ -0,0 +1,269 @@ +/* + + 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; + +import "@0x/contracts-utils/contracts/utils/LibBytes/LibBytes.sol"; + + +contract TestLibBytes { + + using LibBytes for bytes; + + /// @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 publicPopLastByte(bytes memory b) + public + pure + returns (bytes memory, bytes1 result) + { + result = b.popLastByte(); + return (b, 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 publicPopLast20Bytes(bytes memory b) + public + pure + returns (bytes memory, address result) + { + result = b.popLast20Bytes(); + return (b, 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 publicEquals(bytes memory lhs, bytes memory rhs) + public + pure + returns (bool equal) + { + equal = lhs.equals(rhs); + return equal; + } + + function publicEqualsPop1(bytes memory lhs, bytes memory rhs) + public + pure + returns (bool equal) + { + lhs.popLastByte(); + rhs.popLastByte(); + equal = lhs.equals(rhs); + return equal; + } + + /// @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 publicDeepCopyBytes( + bytes memory dest, + bytes memory source + ) + public + pure + returns (bytes memory) + { + LibBytes.deepCopyBytes(dest, source); + return dest; + } + + /// @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 publicReadAddress( + bytes memory b, + uint256 index + ) + public + pure + returns (address result) + { + result = b.readAddress(index); + 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 publicWriteAddress( + bytes memory b, + uint256 index, + address input + ) + public + pure + returns (bytes memory) + { + b.writeAddress(index, input); + return b; + } + + /// @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 publicReadBytes32( + bytes memory b, + uint256 index + ) + public + pure + returns (bytes32 result) + { + result = b.readBytes32(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 publicWriteBytes32( + bytes memory b, + uint256 index, + bytes32 input + ) + public + pure + returns (bytes memory) + { + b.writeBytes32(index, input); + return b; + } + + /// @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 publicReadUint256( + bytes memory b, + uint256 index + ) + public + pure + returns (uint256 result) + { + result = b.readUint256(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 publicWriteUint256( + bytes memory b, + uint256 index, + uint256 input + ) + public + pure + returns (bytes memory) + { + b.writeUint256(index, input); + return b; + } + + /// @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 publicReadBytes4( + bytes memory b, + uint256 index + ) + public + pure + returns (bytes4 result) + { + result = b.readBytes4(index); + return result; + } + + /// @dev Reads nested bytes from a specific position. + /// @param b Byte array containing nested bytes. + /// @param index Index of nested bytes. + /// @return result Nested bytes. + function publicReadBytesWithLength( + bytes memory b, + uint256 index + ) + public + pure + returns (bytes memory result) + { + result = b.readBytesWithLength(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. + /// @return b Updated input byte array + function publicWriteBytesWithLength( + bytes memory b, + uint256 index, + bytes memory input + ) + public + pure + returns (bytes memory) + { + b.writeBytesWithLength(index, input); + return b; + } + + /// @dev Copies a block of memory from one location to another. + /// @param mem Memory contents we want to apply memCopy to + /// @param dest Destination offset into <mem>. + /// @param source Source offset into <mem>. + /// @param length Length of bytes to copy from <source> to <dest> + /// @return mem Memory contents after calling memCopy. + function testMemcpy( + bytes mem, + uint256 dest, + uint256 source, + uint256 length + ) + public // not external, we need input in memory + pure + returns (bytes) + { + // Sanity check. Overflows are not checked. + require(source + length <= mem.length); + require(dest + length <= mem.length); + + // Get pointer to memory contents + uint256 offset = mem.contentAddress(); + + // Execute memCopy adjusted for memory array location + LibBytes.memCopy(offset + dest, offset + source, length); + + // Return modified memory contents + return mem; + } +} diff --git a/contracts/utils/contracts/utils/LibBytes/LibBytes.sol b/contracts/utils/contracts/utils/LibBytes/LibBytes.sol new file mode 100644 index 000000000..369f588ad --- /dev/null +++ b/contracts/utils/contracts/utils/LibBytes/LibBytes.sol @@ -0,0 +1,567 @@ +/* + + 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 + ); + } +} diff --git a/contracts/utils/contracts/utils/Ownable/IOwnable.sol b/contracts/utils/contracts/utils/Ownable/IOwnable.sol new file mode 100644 index 000000000..5deb13497 --- /dev/null +++ b/contracts/utils/contracts/utils/Ownable/IOwnable.sol @@ -0,0 +1,8 @@ +pragma solidity 0.4.24; + + +contract IOwnable { + + function transferOwnership(address newOwner) + public; +} diff --git a/contracts/utils/contracts/utils/Ownable/Ownable.sol b/contracts/utils/contracts/utils/Ownable/Ownable.sol new file mode 100644 index 000000000..0c830be68 --- /dev/null +++ b/contracts/utils/contracts/utils/Ownable/Ownable.sol @@ -0,0 +1,33 @@ +pragma solidity 0.4.24; + +import "./IOwnable.sol"; + + +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; + } + } +} diff --git a/contracts/utils/contracts/utils/ReentrancyGuard/ReentrancyGuard.sol b/contracts/utils/contracts/utils/ReentrancyGuard/ReentrancyGuard.sol new file mode 100644 index 000000000..9f98a7a16 --- /dev/null +++ b/contracts/utils/contracts/utils/ReentrancyGuard/ReentrancyGuard.sol @@ -0,0 +1,45 @@ +/* + + 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 ReentrancyGuard { + + // Locked state of mutex + bool private locked = false; + + /// @dev Functions with this modifer cannot be reentered. The mutex will be locked + /// before function execution and unlocked after. + modifier nonReentrant() { + // Ensure mutex is unlocked + require( + !locked, + "REENTRANCY_ILLEGAL" + ); + + // Lock mutex before function call + locked = true; + + // Perform function call + _; + + // Unlock mutex after function call + locked = false; + } +} diff --git a/contracts/utils/contracts/utils/SafeMath/SafeMath.sol b/contracts/utils/contracts/utils/SafeMath/SafeMath.sol new file mode 100644 index 000000000..2855edb9d --- /dev/null +++ b/contracts/utils/contracts/utils/SafeMath/SafeMath.sol @@ -0,0 +1,87 @@ +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; + } +} diff --git a/contracts/utils/package.json b/contracts/utils/package.json new file mode 100644 index 000000000..94b3cb7c7 --- /dev/null +++ b/contracts/utils/package.json @@ -0,0 +1,89 @@ +{ + "private": true, + "name": "@0x/contracts-utils", + "version": "1.0.0", + "engines": { + "node": ">=6.12" + }, + "description": "Smart contract utils of 0x protocol", + "main": "lib/src/index.js", + "directories": { + "test": "test" + }, + "scripts": { + "build": "yarn pre_build && tsc -b", + "build:ci": "yarn build", + "pre_build": "run-s compile generate_contract_wrappers", + "test": "yarn run_mocha", + "rebuild_and_test": "run-s build test", + "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov", + "test:profiler": "SOLIDITY_PROFILER=true run-s build run_mocha profiler:report:html", + "test:trace": "SOLIDITY_REVERT_TRACE=true run-s build run_mocha", + "run_mocha": + "mocha --require source-map-support/register --require make-promises-safe 'lib/test/**/*.js' --timeout 100000 --bail --exit", + "compile": "sol-compiler --contracts-dir contracts", + "clean": "shx rm -rf lib generated-artifacts generated-wrappers", + "generate_contract_wrappers": "abi-gen --abis ${npm_package_config_abis} --template ../../node_modules/@0x/abi-gen-templates/contract.handlebars --partials '../../node_modules/@0x/abi-gen-templates/partials/**/*.handlebars' --output generated-wrappers --backend ethers", + "lint": "tslint --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts", + "coverage:report:text": "istanbul report text", + "coverage:report:html": "istanbul report html && open coverage/index.html", + "profiler:report:html": "istanbul report html && open coverage/index.html", + "coverage:report:lcov": "istanbul report lcov", + "test:circleci": "yarn test", + "lint-contracts": "solhint contracts/**/**/**/**/*.sol" + }, + "config": { + "abis": "generated-artifacts/@(IOwnable|Ownable|LibBytes|ReentrancyGuard|SafeMath|TestConstants|TestLibBytes).json" + }, + "repository": { + "type": "git", + "url": "https://github.com/0xProject/0x-monorepo.git" + }, + "license": "Apache-2.0", + "bugs": { + "url": "https://github.com/0xProject/0x-monorepo/issues" + }, + "homepage": "https://github.com/0xProject/0x-monorepo/contracts/core/README.md", + "devDependencies": { + "@0x/contracts-test-utils": "^1.0.0", + "@0x/abi-gen": "^1.0.17", + "@0x/dev-utils": "^1.0.19", + "@0x/sol-compiler": "^1.1.14", + "@0x/sol-cov": "^2.1.14", + "@0x/subproviders": "^2.1.6", + "@0x/tslint-config": "^1.0.10", + "@types/bn.js": "^4.11.0", + "@types/lodash": "4.14.104", + "@types/node": "*", + "@types/yargs": "^10.0.0", + "chai": "^4.0.1", + "chai-as-promised": "^7.1.0", + "chai-bignumber": "^2.0.1", + "dirty-chai": "^2.0.1", + "make-promises-safe": "^1.1.0", + "ethereumjs-abi": "0.6.5", + "mocha": "^4.1.0", + "npm-run-all": "^4.1.2", + "shx": "^0.2.2", + "solc": "^0.4.24", + "solhint": "^1.2.1", + "tslint": "5.11.0", + "typescript": "3.0.1", + "yargs": "^10.0.3" + }, + "dependencies": { + "@0x/base-contract": "^3.0.8", + "@0x/order-utils": "^3.0.4", + "@0x/contracts-multisig": "^1.0.0", + "@0x/types": "^1.3.0", + "@0x/typescript-typings": "^3.0.4", + "@0x/utils": "^2.0.6", + "@0x/web3-wrapper": "^3.1.6", + "ethereum-types": "^1.1.2", + "ethereumjs-util": "^5.1.1", + "lodash": "^4.17.5" + }, + "publishConfig": { + "access": "public" + } +} diff --git a/contracts/utils/src/artifacts/index.ts b/contracts/utils/src/artifacts/index.ts new file mode 100644 index 000000000..a5c2b215c --- /dev/null +++ b/contracts/utils/src/artifacts/index.ts @@ -0,0 +1,19 @@ +import { ContractArtifact } from 'ethereum-types'; + +import * as IOwnable from '../../generated-artifacts/IOwnable.json'; +import * as LibBytes from '../../generated-artifacts/LibBytes.json'; +import * as Ownable from '../../generated-artifacts/Ownable.json'; +import * as ReentrancyGuard from '../../generated-artifacts/ReentrancyGuard.json'; +import * as SafeMath from '../../generated-artifacts/SafeMath.json'; +import * as TestConstants from '../../generated-artifacts/TestConstants.json'; +import * as TestLibBytes from '../../generated-artifacts/TestLibBytes.json'; + +export const artifacts = { + TestConstants: TestConstants as ContractArtifact, + TestLibBytes: TestLibBytes as ContractArtifact, + IOwnable: IOwnable as ContractArtifact, + LibBytes: LibBytes as ContractArtifact, + Ownable: Ownable as ContractArtifact, + SafeMath: SafeMath as ContractArtifact, + ReentrancyGuard: ReentrancyGuard as ContractArtifact, +}; diff --git a/contracts/utils/src/index.ts b/contracts/utils/src/index.ts new file mode 100644 index 000000000..d55f08ea2 --- /dev/null +++ b/contracts/utils/src/index.ts @@ -0,0 +1,2 @@ +export * from './artifacts'; +export * from './wrappers'; diff --git a/contracts/utils/src/wrappers/index.ts b/contracts/utils/src/wrappers/index.ts new file mode 100644 index 000000000..823b7fa4b --- /dev/null +++ b/contracts/utils/src/wrappers/index.ts @@ -0,0 +1,2 @@ +export * from '../../generated-wrappers/test_constants'; +export * from '../../generated-wrappers/test_lib_bytes'; diff --git a/contracts/utils/test/global_hooks.ts b/contracts/utils/test/global_hooks.ts new file mode 100644 index 000000000..f8ace376a --- /dev/null +++ b/contracts/utils/test/global_hooks.ts @@ -0,0 +1,17 @@ +import { env, EnvVars } from '@0x/dev-utils'; + +import { coverage, profiler, provider } from '@0x/contracts-test-utils'; +before('start web3 provider', () => { + provider.start(); +}); +after('generate coverage report', async () => { + if (env.parseBoolean(EnvVars.SolidityCoverage)) { + const coverageSubprovider = coverage.getCoverageSubproviderSingleton(); + await coverageSubprovider.writeCoverageAsync(); + } + if (env.parseBoolean(EnvVars.SolidityProfiler)) { + const profilerSubprovider = profiler.getProfilerSubproviderSingleton(); + await profilerSubprovider.writeProfilerOutputAsync(); + } + provider.stop(); +}); diff --git a/contracts/utils/test/lib_bytes.ts b/contracts/utils/test/lib_bytes.ts new file mode 100644 index 000000000..985a98943 --- /dev/null +++ b/contracts/utils/test/lib_bytes.ts @@ -0,0 +1,875 @@ +import { + chaiSetup, + constants, + expectContractCallFailedAsync, + provider, + txDefaults, + typeEncodingUtils, + web3Wrapper, +} from '@0x/contracts-test-utils'; +import { BlockchainLifecycle } from '@0x/dev-utils'; +import { generatePseudoRandomSalt } from '@0x/order-utils'; +import { RevertReason } from '@0x/types'; +import { BigNumber } from '@0x/utils'; +import BN = require('bn.js'); +import * as chai from 'chai'; +import ethUtil = require('ethereumjs-util'); +import * as _ from 'lodash'; + +import { TestLibBytesContract } from '../generated-wrappers/test_lib_bytes'; +import { artifacts } from '../src'; + +chaiSetup.configure(); +const expect = chai.expect; +const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper); + +// BUG: Ideally we would use Buffer.from(memory).toString('hex') +// https://github.com/Microsoft/TypeScript/issues/23155 +const toHex = (buf: Uint8Array): string => buf.reduce((a, v) => a + ('00' + v.toString(16)).slice(-2), '0x'); + +const fromHex = (str: string): Uint8Array => Uint8Array.from(Buffer.from(str.slice(2), 'hex')); + +describe('LibBytes', () => { + let libBytes: TestLibBytesContract; + const byteArrayShorterThan32Bytes = '0x012345'; + const byteArrayShorterThan20Bytes = byteArrayShorterThan32Bytes; + const byteArrayLongerThan32Bytes = + '0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef'; + const byteArrayLongerThan32BytesFirstBytesSwapped = + '0x2301456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef'; + const byteArrayLongerThan32BytesLastBytesSwapped = + '0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abefcd'; + let testAddress: string; + let testAddressB: string; + const testBytes32 = '0x102030405060708090a0b0c0d0e0f0102030405060708090a0b0c0d0e0f01020'; + const testBytes32B = '0x534877abd8443578526845cdfef020047528759477fedef87346527659aced32'; + const testUint256 = new BigNumber(testBytes32, 16); + const testUint256B = new BigNumber(testBytes32B, 16); + const testBytes4 = '0xabcdef12'; + const testByte = '0xab'; + let shortData: string; + let shortTestBytes: string; + let shortTestBytesAsBuffer: Buffer; + let wordOfData: string; + let wordOfTestBytes: string; + let wordOfTestBytesAsBuffer: Buffer; + let longData: string; + let longTestBytes: string; + let longTestBytesAsBuffer: Buffer; + + before(async () => { + await blockchainLifecycle.startAsync(); + }); + after(async () => { + await blockchainLifecycle.revertAsync(); + }); + before(async () => { + // Setup accounts & addresses + const accounts = await web3Wrapper.getAvailableAddressesAsync(); + testAddress = accounts[1]; + testAddressB = accounts[2]; + // Deploy LibBytes + libBytes = await TestLibBytesContract.deployFrom0xArtifactAsync(artifacts.TestLibBytes, provider, txDefaults); + // Verify lengths of test data + const byteArrayShorterThan32BytesLength = ethUtil.toBuffer(byteArrayShorterThan32Bytes).byteLength; + expect(byteArrayShorterThan32BytesLength).to.be.lessThan(32); + const byteArrayLongerThan32BytesLength = ethUtil.toBuffer(byteArrayLongerThan32Bytes).byteLength; + expect(byteArrayLongerThan32BytesLength).to.be.greaterThan(32); + const testBytes32Length = ethUtil.toBuffer(testBytes32).byteLength; + expect(testBytes32Length).to.be.equal(32); + // Create short test bytes + shortData = '0xffffaa'; + const encodedShortData = ethUtil.toBuffer(shortData); + const shortDataLength = new BigNumber(encodedShortData.byteLength); + const encodedShortDataLength = typeEncodingUtils.encodeUint256(shortDataLength); + shortTestBytesAsBuffer = Buffer.concat([encodedShortDataLength, encodedShortData]); + shortTestBytes = ethUtil.bufferToHex(shortTestBytesAsBuffer); + // Create test bytes one word in length + wordOfData = ethUtil.bufferToHex(typeEncodingUtils.encodeUint256(generatePseudoRandomSalt())); + const encodedWordOfData = ethUtil.toBuffer(wordOfData); + const wordOfDataLength = new BigNumber(encodedWordOfData.byteLength); + const encodedWordOfDataLength = typeEncodingUtils.encodeUint256(wordOfDataLength); + wordOfTestBytesAsBuffer = Buffer.concat([encodedWordOfDataLength, encodedWordOfData]); + wordOfTestBytes = ethUtil.bufferToHex(wordOfTestBytesAsBuffer); + // Create long test bytes (combines short test bytes with word of test bytes) + longData = ethUtil.bufferToHex(Buffer.concat([encodedShortData, encodedWordOfData])); + const longDataLength = new BigNumber(encodedShortData.byteLength + encodedWordOfData.byteLength); + const encodedLongDataLength = typeEncodingUtils.encodeUint256(longDataLength); + longTestBytesAsBuffer = Buffer.concat([encodedLongDataLength, encodedShortData, encodedWordOfData]); + longTestBytes = ethUtil.bufferToHex(longTestBytesAsBuffer); + }); + beforeEach(async () => { + await blockchainLifecycle.startAsync(); + }); + afterEach(async () => { + await blockchainLifecycle.revertAsync(); + }); + + describe('popLastByte', () => { + it('should revert if length is 0', async () => { + return expectContractCallFailedAsync( + libBytes.publicPopLastByte.callAsync(constants.NULL_BYTES), + RevertReason.LibBytesGreaterThanZeroLengthRequired, + ); + }); + it('should pop the last byte from the input and return it when array holds more than 1 byte', async () => { + const [newBytes, poppedByte] = await libBytes.publicPopLastByte.callAsync(byteArrayLongerThan32Bytes); + const expectedNewBytes = byteArrayLongerThan32Bytes.slice(0, -2); + const expectedPoppedByte = `0x${byteArrayLongerThan32Bytes.slice(-2)}`; + expect(newBytes).to.equal(expectedNewBytes); + expect(poppedByte).to.equal(expectedPoppedByte); + }); + it('should pop the last byte from the input and return it when array is exactly 1 byte', async () => { + const [newBytes, poppedByte] = await libBytes.publicPopLastByte.callAsync(testByte); + const expectedNewBytes = '0x'; + expect(newBytes).to.equal(expectedNewBytes); + return expect(poppedByte).to.be.equal(testByte); + }); + }); + + describe('popLast20Bytes', () => { + it('should revert if length is less than 20', async () => { + return expectContractCallFailedAsync( + libBytes.publicPopLast20Bytes.callAsync(byteArrayShorterThan20Bytes), + RevertReason.LibBytesGreaterOrEqualTo20LengthRequired, + ); + }); + it('should pop the last 20 bytes from the input and return it when array holds more than 20 bytes', async () => { + const [newBytes, poppedAddress] = await libBytes.publicPopLast20Bytes.callAsync(byteArrayLongerThan32Bytes); + const expectedNewBytes = byteArrayLongerThan32Bytes.slice(0, -40); + const expectedPoppedAddress = `0x${byteArrayLongerThan32Bytes.slice(-40)}`; + expect(newBytes).to.equal(expectedNewBytes); + expect(poppedAddress).to.equal(expectedPoppedAddress); + }); + it('should pop the last 20 bytes from the input and return it when array is exactly 20 bytes', async () => { + const [newBytes, poppedAddress] = await libBytes.publicPopLast20Bytes.callAsync(testAddress); + const expectedNewBytes = '0x'; + const expectedPoppedAddress = testAddress; + expect(newBytes).to.equal(expectedNewBytes); + expect(poppedAddress).to.equal(expectedPoppedAddress); + }); + }); + + describe('equals', () => { + it('should return true if byte arrays are equal (both arrays < 32 bytes)', async () => { + const isEqual = await libBytes.publicEquals.callAsync( + byteArrayShorterThan32Bytes, + byteArrayShorterThan32Bytes, + ); + return expect(isEqual).to.be.true(); + }); + it('should return true if byte arrays are equal (both arrays > 32 bytes)', async () => { + const isEqual = await libBytes.publicEquals.callAsync( + byteArrayLongerThan32Bytes, + byteArrayLongerThan32Bytes, + ); + return expect(isEqual).to.be.true(); + }); + it('should return false if byte arrays are not equal (first array < 32 bytes, second array > 32 bytes)', async () => { + const isEqual = await libBytes.publicEquals.callAsync( + byteArrayShorterThan32Bytes, + byteArrayLongerThan32Bytes, + ); + return expect(isEqual).to.be.false(); + }); + it('should return false if byte arrays are not equal (first array > 32 bytes, second array < 32 bytes)', async () => { + const isEqual = await libBytes.publicEquals.callAsync( + byteArrayLongerThan32Bytes, + byteArrayShorterThan32Bytes, + ); + return expect(isEqual).to.be.false(); + }); + it('should return false if byte arrays are not equal (same length, but a byte in first word differs)', async () => { + const isEqual = await libBytes.publicEquals.callAsync( + byteArrayLongerThan32BytesFirstBytesSwapped, + byteArrayLongerThan32Bytes, + ); + return expect(isEqual).to.be.false(); + }); + it('should return false if byte arrays are not equal (same length, but a byte in last word differs)', async () => { + const isEqual = await libBytes.publicEquals.callAsync( + byteArrayLongerThan32BytesLastBytesSwapped, + byteArrayLongerThan32Bytes, + ); + return expect(isEqual).to.be.false(); + }); + + describe('should ignore trailing data', () => { + it('should return true when both < 32 bytes', async () => { + const isEqual = await libBytes.publicEqualsPop1.callAsync('0x0102', '0x0103'); + return expect(isEqual).to.be.true(); + }); + }); + }); + + describe('deepCopyBytes', () => { + it('should revert if dest is shorter than source', async () => { + return expectContractCallFailedAsync( + libBytes.publicDeepCopyBytes.callAsync(byteArrayShorterThan32Bytes, byteArrayLongerThan32Bytes), + RevertReason.LibBytesGreaterOrEqualToSourceBytesLengthRequired, + ); + }); + it('should overwrite dest with source if source and dest have equal length', async () => { + const zeroedByteArrayLongerThan32Bytes = `0x${_.repeat('0', byteArrayLongerThan32Bytes.length - 2)}`; + const zeroedBytesAfterCopy = await libBytes.publicDeepCopyBytes.callAsync( + zeroedByteArrayLongerThan32Bytes, + byteArrayLongerThan32Bytes, + ); + return expect(zeroedBytesAfterCopy).to.be.equal(byteArrayLongerThan32Bytes); + }); + it('should overwrite the leftmost len(source) bytes of dest if dest is larger than source', async () => { + const zeroedByteArrayLongerThan32Bytes = `0x${_.repeat('0', byteArrayLongerThan32Bytes.length * 2)}`; + const zeroedBytesAfterCopy = await libBytes.publicDeepCopyBytes.callAsync( + zeroedByteArrayLongerThan32Bytes, + byteArrayLongerThan32Bytes, + ); + const copiedBytes = zeroedBytesAfterCopy.slice(0, byteArrayLongerThan32Bytes.length); + return expect(copiedBytes).to.be.equal(byteArrayLongerThan32Bytes); + }); + it('should not overwrite the rightmost bytes of dest if dest is larger than source', async () => { + const zeroedByteArrayLongerThan32Bytes = `0x${_.repeat('0', byteArrayLongerThan32Bytes.length * 2)}`; + const zeroedBytesAfterCopy = await libBytes.publicDeepCopyBytes.callAsync( + zeroedByteArrayLongerThan32Bytes, + byteArrayLongerThan32Bytes, + ); + const expectedNotCopiedBytes = zeroedByteArrayLongerThan32Bytes.slice(byteArrayLongerThan32Bytes.length); + const notCopiedBytes = zeroedBytesAfterCopy.slice(byteArrayLongerThan32Bytes.length); + return expect(notCopiedBytes).to.be.equal(expectedNotCopiedBytes); + }); + }); + + describe('readAddress', () => { + it('should successfully read address when the address takes up the whole array', async () => { + const byteArray = ethUtil.addHexPrefix(testAddress); + const testAddressOffset = new BigNumber(0); + const address = await libBytes.publicReadAddress.callAsync(byteArray, testAddressOffset); + return expect(address).to.be.equal(testAddress); + }); + it('should successfully read address when it is offset in the array', async () => { + const addressByteArrayBuffer = ethUtil.toBuffer(testAddress); + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, addressByteArrayBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testAddressOffset = new BigNumber(prefixByteArrayBuffer.byteLength); + const address = await libBytes.publicReadAddress.callAsync(combinedByteArray, testAddressOffset); + return expect(address).to.be.equal(testAddress); + }); + it('should fail if the byte array is too short to hold an address', async () => { + const shortByteArray = '0xabcdef'; + const offset = new BigNumber(0); + return expectContractCallFailedAsync( + libBytes.publicReadAddress.callAsync(shortByteArray, offset), + RevertReason.LibBytesGreaterOrEqualTo20LengthRequired, + ); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold an address', async () => { + const byteArray = testAddress; + const badOffset = new BigNumber(ethUtil.toBuffer(byteArray).byteLength); + return expectContractCallFailedAsync( + libBytes.publicReadAddress.callAsync(byteArray, badOffset), + RevertReason.LibBytesGreaterOrEqualTo20LengthRequired, + ); + }); + }); + + describe('writeAddress', () => { + it('should successfully write address when the address takes up the whole array', async () => { + const byteArray = testAddress; + const testAddressOffset = new BigNumber(0); + const newByteArray = await libBytes.publicWriteAddress.callAsync( + byteArray, + testAddressOffset, + testAddressB, + ); + return expect(newByteArray).to.be.equal(testAddressB); + }); + it('should successfully write address when it is offset in the array', async () => { + const addressByteArrayBuffer = ethUtil.toBuffer(testAddress); + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, addressByteArrayBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testAddressOffset = new BigNumber(prefixByteArrayBuffer.byteLength); + const newByteArray = await libBytes.publicWriteAddress.callAsync( + combinedByteArray, + testAddressOffset, + testAddressB, + ); + const newByteArrayBuffer = ethUtil.toBuffer(newByteArray); + const addressFromOffsetBuffer = newByteArrayBuffer.slice(prefixByteArrayBuffer.byteLength); + const addressFromOffset = ethUtil.addHexPrefix(ethUtil.bufferToHex(addressFromOffsetBuffer)); + return expect(addressFromOffset).to.be.equal(testAddressB); + }); + it('should fail if the byte array is too short to hold an address', async () => { + const offset = new BigNumber(0); + return expectContractCallFailedAsync( + libBytes.publicWriteAddress.callAsync(byteArrayShorterThan20Bytes, offset, testAddress), + RevertReason.LibBytesGreaterOrEqualTo20LengthRequired, + ); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold an address', async () => { + const byteArray = byteArrayLongerThan32Bytes; + const badOffset = new BigNumber(ethUtil.toBuffer(byteArray).byteLength); + return expectContractCallFailedAsync( + libBytes.publicWriteAddress.callAsync(byteArray, badOffset, testAddress), + RevertReason.LibBytesGreaterOrEqualTo20LengthRequired, + ); + }); + }); + + describe('readBytes32', () => { + it('should successfully read bytes32 when the bytes32 takes up the whole array', async () => { + const testBytes32Offset = new BigNumber(0); + const bytes32 = await libBytes.publicReadBytes32.callAsync(testBytes32, testBytes32Offset); + return expect(bytes32).to.be.equal(testBytes32); + }); + it('should successfully read bytes32 when it is offset in the array', async () => { + const bytes32ByteArrayBuffer = ethUtil.toBuffer(testBytes32); + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, bytes32ByteArrayBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testBytes32Offset = new BigNumber(prefixByteArrayBuffer.byteLength); + const bytes32 = await libBytes.publicReadBytes32.callAsync(combinedByteArray, testBytes32Offset); + return expect(bytes32).to.be.equal(testBytes32); + }); + it('should fail if the byte array is too short to hold a bytes32', async () => { + const offset = new BigNumber(0); + return expectContractCallFailedAsync( + libBytes.publicReadBytes32.callAsync(byteArrayShorterThan32Bytes, offset), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold a bytes32', async () => { + const badOffset = new BigNumber(ethUtil.toBuffer(testBytes32).byteLength); + return expectContractCallFailedAsync( + libBytes.publicReadBytes32.callAsync(testBytes32, badOffset), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + }); + + describe('writeBytes32', () => { + it('should successfully write bytes32 when the address takes up the whole array', async () => { + const byteArray = testBytes32; + const testBytes32Offset = new BigNumber(0); + const newByteArray = await libBytes.publicWriteBytes32.callAsync( + byteArray, + testBytes32Offset, + testBytes32B, + ); + return expect(newByteArray).to.be.equal(testBytes32B); + }); + it('should successfully write bytes32 when it is offset in the array', async () => { + const bytes32ByteArrayBuffer = ethUtil.toBuffer(testBytes32); + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, bytes32ByteArrayBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testBytes32Offset = new BigNumber(prefixByteArrayBuffer.byteLength); + const newByteArray = await libBytes.publicWriteBytes32.callAsync( + combinedByteArray, + testBytes32Offset, + testBytes32B, + ); + const newByteArrayBuffer = ethUtil.toBuffer(newByteArray); + const bytes32FromOffsetBuffer = newByteArrayBuffer.slice(prefixByteArrayBuffer.byteLength); + const bytes32FromOffset = ethUtil.addHexPrefix(ethUtil.bufferToHex(bytes32FromOffsetBuffer)); + return expect(bytes32FromOffset).to.be.equal(testBytes32B); + }); + it('should fail if the byte array is too short to hold a bytes32', async () => { + const offset = new BigNumber(0); + return expectContractCallFailedAsync( + libBytes.publicWriteBytes32.callAsync(byteArrayShorterThan32Bytes, offset, testBytes32), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold a bytes32', async () => { + const byteArray = byteArrayLongerThan32Bytes; + const badOffset = new BigNumber(ethUtil.toBuffer(byteArray).byteLength); + return expectContractCallFailedAsync( + libBytes.publicWriteBytes32.callAsync(byteArray, badOffset, testBytes32), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + }); + + describe('readUint256', () => { + it('should successfully read uint256 when the uint256 takes up the whole array', async () => { + const formattedTestUint256 = new BN(testUint256.toString(10)); + const testUint256AsBuffer = ethUtil.toBuffer(formattedTestUint256); + const byteArray = ethUtil.bufferToHex(testUint256AsBuffer); + const testUint256Offset = new BigNumber(0); + const uint256 = await libBytes.publicReadUint256.callAsync(byteArray, testUint256Offset); + return expect(uint256).to.bignumber.equal(testUint256); + }); + it('should successfully read uint256 when it is offset in the array', async () => { + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const formattedTestUint256 = new BN(testUint256.toString(10)); + const testUint256AsBuffer = ethUtil.toBuffer(formattedTestUint256); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, testUint256AsBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength); + const uint256 = await libBytes.publicReadUint256.callAsync(combinedByteArray, testUint256Offset); + return expect(uint256).to.bignumber.equal(testUint256); + }); + it('should fail if the byte array is too short to hold a uint256', async () => { + const offset = new BigNumber(0); + return expectContractCallFailedAsync( + libBytes.publicReadUint256.callAsync(byteArrayShorterThan32Bytes, offset), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold a uint256', async () => { + const formattedTestUint256 = new BN(testUint256.toString(10)); + const testUint256AsBuffer = ethUtil.toBuffer(formattedTestUint256); + const byteArray = ethUtil.bufferToHex(testUint256AsBuffer); + const badOffset = new BigNumber(testUint256AsBuffer.byteLength); + return expectContractCallFailedAsync( + libBytes.publicReadUint256.callAsync(byteArray, badOffset), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + }); + + describe('writeUint256', () => { + it('should successfully write uint256 when the address takes up the whole array', async () => { + const byteArray = testBytes32; + const testUint256Offset = new BigNumber(0); + const newByteArray = await libBytes.publicWriteUint256.callAsync( + byteArray, + testUint256Offset, + testUint256B, + ); + const newByteArrayAsUint256 = new BigNumber(newByteArray, 16); + return expect(newByteArrayAsUint256).to.be.bignumber.equal(testUint256B); + }); + it('should successfully write uint256 when it is offset in the array', async () => { + const bytes32ByteArrayBuffer = ethUtil.toBuffer(testBytes32); + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, bytes32ByteArrayBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength); + const newByteArray = await libBytes.publicWriteUint256.callAsync( + combinedByteArray, + testUint256Offset, + testUint256B, + ); + const newByteArrayBuffer = ethUtil.toBuffer(newByteArray); + const uint256FromOffsetBuffer = newByteArrayBuffer.slice(prefixByteArrayBuffer.byteLength); + const uint256FromOffset = new BigNumber( + ethUtil.addHexPrefix(ethUtil.bufferToHex(uint256FromOffsetBuffer)), + 16, + ); + return expect(uint256FromOffset).to.be.bignumber.equal(testUint256B); + }); + it('should fail if the byte array is too short to hold a uint256', async () => { + const offset = new BigNumber(0); + return expectContractCallFailedAsync( + libBytes.publicWriteUint256.callAsync(byteArrayShorterThan32Bytes, offset, testUint256), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold a uint256', async () => { + const byteArray = byteArrayLongerThan32Bytes; + const badOffset = new BigNumber(ethUtil.toBuffer(byteArray).byteLength); + return expectContractCallFailedAsync( + libBytes.publicWriteUint256.callAsync(byteArray, badOffset, testUint256), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + }); + + describe('readBytes4', () => { + // AssertionError: expected promise to be rejected with an error including 'revert' but it was fulfilled with '0x08c379a0' + it('should revert if byte array has a length < 4', async () => { + const byteArrayLessThan4Bytes = '0x010101'; + const offset = new BigNumber(0); + return expectContractCallFailedAsync( + libBytes.publicReadBytes4.callAsync(byteArrayLessThan4Bytes, offset), + RevertReason.LibBytesGreaterOrEqualTo4LengthRequired, + ); + }); + it('should return the first 4 bytes of a byte array of arbitrary length', async () => { + const first4Bytes = await libBytes.publicReadBytes4.callAsync(byteArrayLongerThan32Bytes, new BigNumber(0)); + const expectedFirst4Bytes = byteArrayLongerThan32Bytes.slice(0, 10); + expect(first4Bytes).to.equal(expectedFirst4Bytes); + }); + it('should successfully read bytes4 when the bytes4 takes up the whole array', async () => { + const testBytes4Offset = new BigNumber(0); + const bytes4 = await libBytes.publicReadBytes4.callAsync(testBytes4, testBytes4Offset); + return expect(bytes4).to.be.equal(testBytes4); + }); + it('should successfully read bytes4 when it is offset in the array', async () => { + const bytes4ByteArrayBuffer = ethUtil.toBuffer(testBytes4); + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, bytes4ByteArrayBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testBytes4Offset = new BigNumber(prefixByteArrayBuffer.byteLength); + const bytes4 = await libBytes.publicReadBytes4.callAsync(combinedByteArray, testBytes4Offset); + return expect(bytes4).to.be.equal(testBytes4); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold a bytes4', async () => { + const badOffset = new BigNumber(ethUtil.toBuffer(testBytes4).byteLength); + return expectContractCallFailedAsync( + libBytes.publicReadBytes4.callAsync(testBytes4, badOffset), + RevertReason.LibBytesGreaterOrEqualTo4LengthRequired, + ); + }); + }); + + describe('readBytesWithLength', () => { + it('should successfully read short, nested array of bytes when it takes up the whole array', async () => { + const testBytesOffset = new BigNumber(0); + const bytes = await libBytes.publicReadBytesWithLength.callAsync(shortTestBytes, testBytesOffset); + return expect(bytes).to.be.equal(shortData); + }); + it('should successfully read short, nested array of bytes when it is offset in the array', async () => { + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, shortTestBytesAsBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength); + const bytes = await libBytes.publicReadBytesWithLength.callAsync(combinedByteArray, testUint256Offset); + return expect(bytes).to.be.equal(shortData); + }); + it('should successfully read a nested array of bytes - one word in length - when it takes up the whole array', async () => { + const testBytesOffset = new BigNumber(0); + const bytes = await libBytes.publicReadBytesWithLength.callAsync(wordOfTestBytes, testBytesOffset); + return expect(bytes).to.be.equal(wordOfData); + }); + it('should successfully read a nested array of bytes - one word in length - when it is offset in the array', async () => { + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, wordOfTestBytesAsBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength); + const bytes = await libBytes.publicReadBytesWithLength.callAsync(combinedByteArray, testUint256Offset); + return expect(bytes).to.be.equal(wordOfData); + }); + it('should successfully read long, nested array of bytes when it takes up the whole array', async () => { + const testBytesOffset = new BigNumber(0); + const bytes = await libBytes.publicReadBytesWithLength.callAsync(longTestBytes, testBytesOffset); + return expect(bytes).to.be.equal(longData); + }); + it('should successfully read long, nested array of bytes when it is offset in the array', async () => { + const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef'); + const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, longTestBytesAsBuffer]); + const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer); + const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength); + const bytes = await libBytes.publicReadBytesWithLength.callAsync(combinedByteArray, testUint256Offset); + return expect(bytes).to.be.equal(longData); + }); + it('should fail if the byte array is too short to hold the length of a nested byte array', async () => { + // The length of the nested array is 32 bytes. By storing less than 32 bytes, a length cannot be read. + const offset = new BigNumber(0); + return expectContractCallFailedAsync( + libBytes.publicReadBytesWithLength.callAsync(byteArrayShorterThan32Bytes, offset), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + it('should fail if we store a nested byte array length, without a nested byte array', async () => { + const offset = new BigNumber(0); + return expectContractCallFailedAsync( + libBytes.publicReadBytesWithLength.callAsync(testBytes32, offset), + RevertReason.LibBytesGreaterOrEqualToNestedBytesLengthRequired, + ); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold the length of a nested byte array', async () => { + const badOffset = new BigNumber(ethUtil.toBuffer(byteArrayShorterThan32Bytes).byteLength); + return expectContractCallFailedAsync( + libBytes.publicReadBytesWithLength.callAsync(byteArrayShorterThan32Bytes, badOffset), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold the nested byte array', async () => { + const badOffset = new BigNumber(ethUtil.toBuffer(testBytes32).byteLength); + return expectContractCallFailedAsync( + libBytes.publicReadBytesWithLength.callAsync(testBytes32, badOffset), + RevertReason.LibBytesGreaterOrEqualTo32LengthRequired, + ); + }); + }); + + describe('writeBytesWithLength', () => { + it('should successfully write short, nested array of bytes when it takes up the whole array', async () => { + const testBytesOffset = new BigNumber(0); + const emptyByteArray = ethUtil.bufferToHex(new Buffer(shortTestBytesAsBuffer.byteLength)); + const bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync( + emptyByteArray, + testBytesOffset, + shortData, + ); + const bytesRead = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset); + return expect(bytesRead).to.be.equal(shortData); + }); + it('should successfully write short, nested array of bytes when it is offset in the array', async () => { + // Write a prefix to the array + const prefixData = '0xabcdef'; + const prefixDataAsBuffer = ethUtil.toBuffer(prefixData); + const prefixOffset = new BigNumber(0); + const emptyByteArray = ethUtil.bufferToHex( + new Buffer(prefixDataAsBuffer.byteLength + shortTestBytesAsBuffer.byteLength), + ); + let bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync( + emptyByteArray, + prefixOffset, + prefixData, + ); + // Write data after prefix + const testBytesOffset = new BigNumber(prefixDataAsBuffer.byteLength); + bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync( + bytesWritten, + testBytesOffset, + shortData, + ); + // Read data after prefix and validate + const bytes = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset); + return expect(bytes).to.be.equal(shortData); + }); + it('should successfully write a nested array of bytes - one word in length - when it takes up the whole array', async () => { + const testBytesOffset = new BigNumber(0); + const emptyByteArray = ethUtil.bufferToHex(new Buffer(wordOfTestBytesAsBuffer.byteLength)); + const bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync( + emptyByteArray, + testBytesOffset, + wordOfData, + ); + const bytesRead = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset); + return expect(bytesRead).to.be.equal(wordOfData); + }); + it('should successfully write a nested array of bytes - one word in length - when it is offset in the array', async () => { + // Write a prefix to the array + const prefixData = '0xabcdef'; + const prefixDataAsBuffer = ethUtil.toBuffer(prefixData); + const prefixOffset = new BigNumber(0); + const emptyByteArray = ethUtil.bufferToHex( + new Buffer(prefixDataAsBuffer.byteLength + wordOfTestBytesAsBuffer.byteLength), + ); + let bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync( + emptyByteArray, + prefixOffset, + prefixData, + ); + // Write data after prefix + const testBytesOffset = new BigNumber(prefixDataAsBuffer.byteLength); + bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync( + bytesWritten, + testBytesOffset, + wordOfData, + ); + // Read data after prefix and validate + const bytes = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset); + return expect(bytes).to.be.equal(wordOfData); + }); + it('should successfully write a long, nested bytes when it takes up the whole array', async () => { + const testBytesOffset = new BigNumber(0); + const emptyByteArray = ethUtil.bufferToHex(new Buffer(longTestBytesAsBuffer.byteLength)); + const bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync( + emptyByteArray, + testBytesOffset, + longData, + ); + const bytesRead = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset); + return expect(bytesRead).to.be.equal(longData); + }); + it('should successfully write long, nested array of bytes when it is offset in the array', async () => { + // Write a prefix to the array + const prefixData = '0xabcdef'; + const prefixDataAsBuffer = ethUtil.toBuffer(prefixData); + const prefixOffset = new BigNumber(0); + const emptyByteArray = ethUtil.bufferToHex( + new Buffer(prefixDataAsBuffer.byteLength + longTestBytesAsBuffer.byteLength), + ); + let bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync( + emptyByteArray, + prefixOffset, + prefixData, + ); + // Write data after prefix + const testBytesOffset = new BigNumber(prefixDataAsBuffer.byteLength); + bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(bytesWritten, testBytesOffset, longData); + // Read data after prefix and validate + const bytes = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset); + return expect(bytes).to.be.equal(longData); + }); + it('should fail if the byte array is too short to hold the length of a nested byte array', async () => { + const offset = new BigNumber(0); + const emptyByteArray = ethUtil.bufferToHex(new Buffer(1)); + return expectContractCallFailedAsync( + libBytes.publicWriteBytesWithLength.callAsync(emptyByteArray, offset, longData), + RevertReason.LibBytesGreaterOrEqualToNestedBytesLengthRequired, + ); + }); + it('should fail if the length between the offset and end of the byte array is too short to hold the length of a nested byte array', async () => { + const emptyByteArray = ethUtil.bufferToHex(new Buffer(shortTestBytesAsBuffer.byteLength)); + const badOffset = new BigNumber(ethUtil.toBuffer(shortTestBytesAsBuffer).byteLength); + return expectContractCallFailedAsync( + libBytes.publicWriteBytesWithLength.callAsync(emptyByteArray, badOffset, shortData), + RevertReason.LibBytesGreaterOrEqualToNestedBytesLengthRequired, + ); + }); + }); + + describe('memCopy', () => { + // Create memory 0x000102...FF + const memSize = 256; + // tslint:disable:no-shadowed-variable + const memory = new Uint8Array(memSize).map((_, i) => i); + const memHex = toHex(memory); + + // Reference implementation to test against + const refMemcpy = (mem: Uint8Array, dest: number, source: number, length: number): Uint8Array => + Uint8Array.from(mem).copyWithin(dest, source, source + length); + + // Test vectors: destination, source, length, job description + type Tests = Array<[number, number, number, string]>; + + const test = (tests: Tests) => + tests.forEach(([dest, source, length, job]) => + it(job, async () => { + const expected = refMemcpy(memory, dest, source, length); + const resultStr = await libBytes.testMemcpy.callAsync( + memHex, + new BigNumber(dest), + new BigNumber(source), + new BigNumber(length), + ); + const result = fromHex(resultStr); + expect(result).to.deep.equal(expected); + }), + ); + + test([[0, 0, 0, 'copies zero bytes with overlap']]); + + describe('copies forward', () => + test([ + [128, 0, 0, 'zero bytes'], + [128, 0, 1, 'one byte'], + [128, 0, 11, 'eleven bytes'], + [128, 0, 31, 'thirty-one bytes'], + [128, 0, 32, 'one word'], + [128, 0, 64, 'two words'], + [128, 0, 96, 'three words'], + [128, 0, 33, 'one word and one byte'], + [128, 0, 72, 'two words and eight bytes'], + [128, 0, 100, 'three words and four bytes'], + ])); + + describe('copies forward within one word', () => + test([ + [16, 0, 0, 'zero bytes'], + [16, 0, 1, 'one byte'], + [16, 0, 11, 'eleven bytes'], + [16, 0, 16, 'sixteen bytes'], + ])); + + describe('copies forward with one byte overlap', () => + test([ + [0, 0, 1, 'one byte'], + [10, 0, 11, 'eleven bytes'], + [30, 0, 31, 'thirty-one bytes'], + [31, 0, 32, 'one word'], + [32, 0, 33, 'one word and one byte'], + [71, 0, 72, 'two words and eight bytes'], + [99, 0, 100, 'three words and four bytes'], + ])); + + describe('copies forward with thirty-one bytes overlap', () => + test([ + [0, 0, 31, 'thirty-one bytes'], + [1, 0, 32, 'one word'], + [2, 0, 33, 'one word and one byte'], + [41, 0, 72, 'two words and eight bytes'], + [69, 0, 100, 'three words and four bytes'], + ])); + + describe('copies forward with one word overlap', () => + test([ + [0, 0, 32, 'one word'], + [1, 0, 33, 'one word and one byte'], + [41, 0, 72, 'two words and eight bytes'], + [69, 0, 100, 'three words and four bytes'], + ])); + + describe('copies forward with one word and one byte overlap', () => + test([ + [0, 0, 33, 'one word and one byte'], + [40, 0, 72, 'two words and eight bytes'], + [68, 0, 100, 'three words and four bytes'], + ])); + + describe('copies forward with two words overlap', () => + test([ + [0, 0, 64, 'two words'], + [8, 0, 72, 'two words and eight bytes'], + [36, 0, 100, 'three words and four bytes'], + ])); + + describe('copies forward within one word and one byte overlap', () => + test([[0, 0, 1, 'one byte'], [10, 0, 11, 'eleven bytes'], [15, 0, 16, 'sixteen bytes']])); + + describe('copies backward', () => + test([ + [0, 128, 0, 'zero bytes'], + [0, 128, 1, 'one byte'], + [0, 128, 11, 'eleven bytes'], + [0, 128, 31, 'thirty-one bytes'], + [0, 128, 32, 'one word'], + [0, 128, 64, 'two words'], + [0, 128, 96, 'three words'], + [0, 128, 33, 'one word and one byte'], + [0, 128, 72, 'two words and eight bytes'], + [0, 128, 100, 'three words and four bytes'], + ])); + + describe('copies backward within one word', () => + test([ + [0, 16, 0, 'zero bytes'], + [0, 16, 1, 'one byte'], + [0, 16, 11, 'eleven bytes'], + [0, 16, 16, 'sixteen bytes'], + ])); + + describe('copies backward with one byte overlap', () => + test([ + [0, 0, 1, 'one byte'], + [0, 10, 11, 'eleven bytes'], + [0, 30, 31, 'thirty-one bytes'], + [0, 31, 32, 'one word'], + [0, 32, 33, 'one word and one byte'], + [0, 71, 72, 'two words and eight bytes'], + [0, 99, 100, 'three words and four bytes'], + ])); + + describe('copies backward with thirty-one bytes overlap', () => + test([ + [0, 0, 31, 'thirty-one bytes'], + [0, 1, 32, 'one word'], + [0, 2, 33, 'one word and one byte'], + [0, 41, 72, 'two words and eight bytes'], + [0, 69, 100, 'three words and four bytes'], + ])); + + describe('copies backward with one word overlap', () => + test([ + [0, 0, 32, 'one word'], + [0, 1, 33, 'one word and one byte'], + [0, 41, 72, 'two words and eight bytes'], + [0, 69, 100, 'three words and four bytes'], + ])); + + describe('copies backward with one word and one byte overlap', () => + test([ + [0, 0, 33, 'one word and one byte'], + [0, 40, 72, 'two words and eight bytes'], + [0, 68, 100, 'three words and four bytes'], + ])); + + describe('copies backward with two words overlap', () => + test([ + [0, 0, 64, 'two words'], + [0, 8, 72, 'two words and eight bytes'], + [0, 36, 100, 'three words and four bytes'], + ])); + + describe('copies forward within one word and one byte overlap', () => + test([[0, 0, 1, 'one byte'], [0, 10, 11, 'eleven bytes'], [0, 15, 16, 'sixteen bytes']])); + }); +}); +// tslint:disable:max-file-line-count diff --git a/contracts/utils/test/libs.ts b/contracts/utils/test/libs.ts new file mode 100644 index 000000000..81596b2e4 --- /dev/null +++ b/contracts/utils/test/libs.ts @@ -0,0 +1,34 @@ +import { chaiSetup, provider, txDefaults, web3Wrapper } from '@0x/contracts-test-utils'; +import { BlockchainLifecycle } from '@0x/dev-utils'; +import * as chai from 'chai'; + +import { TestConstantsContract } from '../generated-wrappers/test_constants'; +import { artifacts } from '../src'; + +chaiSetup.configure(); +const expect = chai.expect; + +const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper); + +describe('Libs', () => { + beforeEach(async () => { + await blockchainLifecycle.startAsync(); + }); + afterEach(async () => { + await blockchainLifecycle.revertAsync(); + }); + + describe('LibConstants', () => { + describe('ZRX_ASSET_DATA', () => { + it('should have the correct ZRX_ASSET_DATA', async () => { + const testConstants = await TestConstantsContract.deployFrom0xArtifactAsync( + artifacts.TestConstants, + provider, + txDefaults, + ); + const isValid = await testConstants.assertValidZrxAssetData.callAsync(); + expect(isValid).to.be.equal(true); + }); + }); + }); +}); diff --git a/contracts/utils/tsconfig.json b/contracts/utils/tsconfig.json new file mode 100644 index 000000000..68251e6b0 --- /dev/null +++ b/contracts/utils/tsconfig.json @@ -0,0 +1,19 @@ +{ + "extends": "../../tsconfig", + "compilerOptions": { + "outDir": "lib", + "rootDir": ".", + "resolveJsonModule": true + }, + "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"], + "files": [ + "./generated-artifacts/TestConstants.json", + "./generated-artifacts/TestLibBytes.json", + "./generated-artifacts/IOwnable.json", + "./generated-artifacts/Ownable.json", + "./generated-artifacts/LibBytes.json", + "./generated-artifacts/SafeMath.json", + "./generated-artifacts/ReentrancyGuard.json" + ], + "exclude": ["./deploy/solc/solc_bin"] +} diff --git a/contracts/utils/tslint.json b/contracts/utils/tslint.json new file mode 100644 index 000000000..1bb3ac2a2 --- /dev/null +++ b/contracts/utils/tslint.json @@ -0,0 +1,6 @@ +{ + "extends": ["@0x/tslint-config"], + "rules": { + "custom-no-magic-numbers": false + } +} |