99f5be8378
* Refactor excess interfaces * Compiles on 0.6 * Refactored into try/catch * Rebase and Refactored to v06 * Handle invalid registry in LP * Update packages/asset-swapper/contracts/src/LiquidityProviderSampler.sol Co-authored-by: Lawrence Forman <lawrence@0xproject.com> * chore: [asset-swapper] Move Bridge Addresses and Gas schedule * curve->pool * lint * Refactor to fix module load order * Move FEE Schedule * rollup: Swerve/Sushi/SnowSwap/DODO (#7) * rollup: Swerve/Sushi * DODO Rollup + Snowswap Swerve * hardcode addresses temporarily * rebase * rename to SUSHISWAP_ROUTER * CHANGELOGs * CHANGELOGs Co-authored-by: Lawrence Forman <lawrence@0xproject.com>
82 lines
2.7 KiB
Solidity
82 lines
2.7 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 ^0.6;
|
|
pragma experimental ABIEncoderV2;
|
|
|
|
import "./interfaces/IMultiBridge.sol";
|
|
|
|
|
|
contract MultiBridgeSampler {
|
|
|
|
/// @dev Default gas limit for multibridge calls.
|
|
uint256 constant private DEFAULT_CALL_GAS = 400e3; // 400k
|
|
|
|
/// @dev Sample sell quotes from MultiBridge.
|
|
/// @param multibridge Address of the MultiBridge contract.
|
|
/// @param takerToken Address of the taker token (what to sell).
|
|
/// @param intermediateToken The address of the intermediate token to
|
|
/// use in an indirect route.
|
|
/// @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 sampleSellsFromMultiBridge(
|
|
address multibridge,
|
|
address takerToken,
|
|
address intermediateToken,
|
|
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);
|
|
|
|
// If no address provided, return all zeros.
|
|
if (multibridge == address(0)) {
|
|
return makerTokenAmounts;
|
|
}
|
|
|
|
for (uint256 i = 0; i < numSamples; i++) {
|
|
(bool didSucceed, bytes memory resultData) =
|
|
multibridge.staticcall.gas(DEFAULT_CALL_GAS)(
|
|
abi.encodeWithSelector(
|
|
IMultiBridge(0).getSellQuote.selector,
|
|
takerToken,
|
|
intermediateToken,
|
|
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;
|
|
}
|
|
}
|
|
}
|