55 lines
2.0 KiB
Solidity
55 lines
2.0 KiB
Solidity
/*
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Copyright 2020 DODO ZOO.
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SPDX-License-Identifier: Apache-2.0
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*/
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pragma solidity 0.6.9;
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import {IDODOAdapter} from "../intf/IDODOAdapter.sol";
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import {IUni} from "../intf/IUni.sol";
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import {IERC20} from "../../intf/IERC20.sol";
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import {SafeMath} from "../../lib/SafeMath.sol";
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contract UniAdapter is IDODOAdapter {
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using SafeMath for uint;
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//fromToken == token0
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function sellBase(address to, address pool, bytes memory) external override {
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address baseToken = IUni(pool).token0();
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(uint reserveIn, uint reserveOut,) = IUni(pool).getReserves();
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require(reserveIn > 0 && reserveOut > 0, 'UniAdapter: INSUFFICIENT_LIQUIDITY');
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uint balance0 = IERC20(baseToken).balanceOf(pool);
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uint sellBaseAmount = balance0 - reserveIn;
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uint receiveQuoteAmount = 0;
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{
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uint sellBaseAmountWithFee = sellBaseAmount.mul(997);
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uint numerator = sellBaseAmountWithFee.mul(reserveOut);
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uint denominator = reserveIn.mul(1000).add(sellBaseAmountWithFee);
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receiveQuoteAmount = numerator / denominator;
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}
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IUni(pool).swap(0, receiveQuoteAmount, to, new bytes(0));
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}
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//fromToken == token1
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function sellQuote(address to, address pool, bytes memory) external override {
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address quoteToken = IUni(pool).token1();
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(uint reserveOut, uint reserveIn,) = IUni(pool).getReserves();
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require(reserveIn > 0 && reserveOut > 0, 'UniAdapter: INSUFFICIENT_LIQUIDITY');
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uint balance1 = IERC20(quoteToken).balanceOf(pool);
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uint sellQuoteAmount = balance1 - reserveIn;
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uint receiveBaseAmount = 0;
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{
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uint sellQuoteAmountWithFee = sellQuoteAmount.mul(997);
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uint numerator = sellQuoteAmountWithFee.mul(reserveOut);
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uint denominator = reserveIn.mul(1000).add(sellQuoteAmountWithFee);
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receiveBaseAmount = numerator / denominator;
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}
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IUni(pool).swap(receiveBaseAmount, 0, to, new bytes(0));
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}
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} |