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author | Alex Browne <stephenalexbrowne@gmail.com> | 2018-10-02 07:44:13 +0800 |
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committer | Alex Browne <stephenalexbrowne@gmail.com> | 2018-10-16 04:36:09 +0800 |
commit | 81c48872415998e53ad653aabf183e18257ec327 (patch) | |
tree | 47e73fbdf817941414fa06035d5e568ee7d34ddb /packages/contracts/src/2.0.0/protocol/Exchange/libs/LibAbiEncoder.sol | |
parent | 83a36aff3fa750560cf6dd6b08b84a5915ea4c5d (diff) | |
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Move generated contract wrappers and artifacts into contracts package
Diffstat (limited to 'packages/contracts/src/2.0.0/protocol/Exchange/libs/LibAbiEncoder.sol')
-rw-r--r-- | packages/contracts/src/2.0.0/protocol/Exchange/libs/LibAbiEncoder.sol | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibAbiEncoder.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibAbiEncoder.sol deleted file mode 100644 index 4aad37709..000000000 --- a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibAbiEncoder.sol +++ /dev/null @@ -1,215 +0,0 @@ -/* - - 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; - -import "./LibOrder.sol"; - - -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; - } -} |