40 lines
1.1 KiB
Solidity
40 lines
1.1 KiB
Solidity
pragma solidity ^0.6;
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pragma experimental ABIEncoderV2;
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import "./interfaces/IGMX.sol";
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contract GMXSampler
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{
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/// @dev Gas limit for UniswapV2 calls.
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function sampleSellsFromGMX(
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address reader,
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address vault,
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address[] memory path,
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uint256[] memory takerTokenAmounts
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)
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public
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view
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returns (uint256[] memory makerTokenAmounts)
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{
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uint256 numSamples = takerTokenAmounts.length;
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makerTokenAmounts = new uint256[](numSamples);
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for (uint256 i = 0; i < numSamples; i++) {
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try
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IGMX(reader).getAmountOut(IVault(vault), path[0], path[1], takerTokenAmounts[i])
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returns (uint256 amountAfterFees, uint256 feeAmount)
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{
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makerTokenAmounts[i] = amountAfterFees;
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// Break early if there are 0 amounts
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if (makerTokenAmounts[i] == 0) {
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break;
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}
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} catch (bytes memory) {
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// Swallow failures, leaving all results as zero.
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break;
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}
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}
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}
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} |