7698f21517
* feat: [asset-swapper] Shell * Deployed and Changelogs * Glue up the deployed address * Glue for FQT rollup
111 lines
3.9 KiB
Solidity
111 lines
3.9 KiB
Solidity
/*
|
|
|
|
Copyright 2020 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 ^0.5.9;
|
|
pragma experimental ABIEncoderV2;
|
|
|
|
import "@0x/contracts-utils/contracts/src/DeploymentConstants.sol";
|
|
import "./interfaces/IShell.sol";
|
|
|
|
contract ShellSampler is
|
|
DeploymentConstants
|
|
{
|
|
/// @dev Default gas limit for Shell calls.
|
|
uint256 constant private DEFAULT_CALL_GAS = 300e3; // 300k
|
|
|
|
/// @dev Sample sell quotes from the Shell contract
|
|
/// @param takerToken Address of the taker token (what to sell).
|
|
/// @param makerToken Address of the maker token (what to buy).
|
|
/// @param takerTokenAmounts Taker token sell amount for each sample.
|
|
/// @return makerTokenAmounts Maker amounts bought at each taker token
|
|
/// amount.
|
|
function sampleSellsFromShell(
|
|
address takerToken,
|
|
address makerToken,
|
|
uint256[] memory takerTokenAmounts
|
|
)
|
|
public
|
|
view
|
|
returns (uint256[] memory makerTokenAmounts)
|
|
{
|
|
// Initialize array of maker token amounts.
|
|
uint256 numSamples = takerTokenAmounts.length;
|
|
makerTokenAmounts = new uint256[](numSamples);
|
|
|
|
for (uint256 i = 0; i < numSamples; i++) {
|
|
(bool didSucceed, bytes memory resultData) =
|
|
address(_getShellAddress()).staticcall.gas(DEFAULT_CALL_GAS)(
|
|
abi.encodeWithSelector(
|
|
IShell(0).viewOriginSwap.selector,
|
|
takerToken,
|
|
makerToken,
|
|
takerTokenAmounts[i]
|
|
));
|
|
uint256 buyAmount = 0;
|
|
if (didSucceed) {
|
|
buyAmount = abi.decode(resultData, (uint256));
|
|
}
|
|
// Exit early if the amount is too high for the source to serve
|
|
if (buyAmount == 0) {
|
|
break;
|
|
}
|
|
makerTokenAmounts[i] = buyAmount;
|
|
}
|
|
}
|
|
|
|
/// @dev Sample buy quotes from Shell contract
|
|
/// @param takerToken Address of the taker token (what to sell).
|
|
/// @param makerToken Address of the maker token (what to buy).
|
|
/// @param makerTokenAmounts Maker token buy amount for each sample.
|
|
/// @return takerTokenAmounts Taker amounts sold at each maker token
|
|
/// amount.
|
|
function sampleBuysFromShell(
|
|
address takerToken,
|
|
address makerToken,
|
|
uint256[] memory makerTokenAmounts
|
|
)
|
|
public
|
|
view
|
|
returns (uint256[] memory takerTokenAmounts)
|
|
{
|
|
// Initialize array of maker token amounts.
|
|
uint256 numSamples = makerTokenAmounts.length;
|
|
takerTokenAmounts = new uint256[](numSamples);
|
|
|
|
for (uint256 i = 0; i < numSamples; i++) {
|
|
(bool didSucceed, bytes memory resultData) =
|
|
address(_getShellAddress()).staticcall.gas(DEFAULT_CALL_GAS)(
|
|
abi.encodeWithSelector(
|
|
IShell(0).viewTargetSwap.selector,
|
|
takerToken,
|
|
makerToken,
|
|
makerTokenAmounts[i]
|
|
));
|
|
uint256 sellAmount = 0;
|
|
if (didSucceed) {
|
|
sellAmount = abi.decode(resultData, (uint256));
|
|
}
|
|
// Exit early if the amount is too high for the source to serve
|
|
if (sellAmount == 0) {
|
|
break;
|
|
}
|
|
takerTokenAmounts[i] = sellAmount;
|
|
}
|
|
}
|
|
}
|