mirror of
https://github.com/Instadapp/dsa-connectors.git
synced 2024-07-29 22:37:00 +00:00
105 lines
3.3 KiB
Solidity
105 lines
3.3 KiB
Solidity
pragma solidity ^0.7.0;
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// import files from common directory
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import { TokenInterface , MemoryInterface } from "../common/interfaces.sol";
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import { Stores } from "../common/stores.sol";
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import { DSMath } from "../common/math.sol";
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interface ICurve {
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function underlying_coins(int128 tokenId) external view returns (address token);
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function get_dy(int128 sellTokenId, int128 buyTokenId, uint256 sellTokenAmt) external returns (uint256 buyTokenAmt);
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function exchange(int128 sellTokenId, int128 buyTokenId, uint256 sellTokenAmt, uint256 minBuyToken) external;
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}
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abstract contract CurveHelpers is Stores, DSMath {
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/**
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* @dev Return Curve 3pool Swap Address
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*/
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function getCurveSwapAddr() internal pure returns (address) {
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return 0xbEbc44782C7dB0a1A60Cb6fe97d0b483032FF1C7;
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}
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/**
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* @dev Return Curve 3pool Token Address
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*/
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function getCurveTokenAddr() internal pure returns (address) {
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return 0x6c3F90f043a72FA612cbac8115EE7e52BDe6E490;
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}
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function convert18ToDec(uint _dec, uint256 _amt) internal pure returns (uint256 amt) {
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amt = (_amt / 10 ** (18 - _dec));
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}
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function convertTo18(uint _dec, uint256 _amt) internal pure returns (uint256 amt) {
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amt = mul(_amt, 10 ** (18 - _dec));
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}
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function getTokenI(address token) internal pure returns (int128 i) {
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if (token == address(0x6B175474E89094C44Da98b954EedeAC495271d0F)) {
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// DAI Token
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i = 0;
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} else if (token == address(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48)) {
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// USDC Token
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i = 1;
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} else if (token == address(0xdAC17F958D2ee523a2206206994597C13D831ec7)) {
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// USDT Token
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i = 2;
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} else {
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revert("token-not-found.");
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}
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}
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}
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abstract contract CurveProtocol is CurveHelpers {
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event LogSell(
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address indexed buyToken,
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address indexed sellToken,
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uint256 buyAmt,
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uint256 sellAmt,
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uint256 getId,
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uint256 setId
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);
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/**
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* @dev Sell Stable ERC20_Token.
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* @param buyAddr buying token address.
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* @param sellAddr selling token amount.
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* @param sellAmt selling token amount.
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* @param unitAmt unit amount of buyAmt/sellAmt with slippage.
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* @param getId Get token amount at this ID from `InstaMemory` Contract.
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* @param setId Set token amount at this ID in `InstaMemory` Contract.
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*/
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function sell(
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address buyAddr,
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address sellAddr,
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uint sellAmt,
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uint unitAmt,
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uint getId,
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uint setId
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) external payable {
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uint _sellAmt = getUint(getId, sellAmt);
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ICurve curve = ICurve(getCurveSwapAddr());
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TokenInterface _buyToken = TokenInterface(buyAddr);
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TokenInterface _sellToken = TokenInterface(sellAddr);
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_sellAmt = _sellAmt == uint(-1) ? _sellToken.balanceOf(address(this)) : _sellAmt;
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_sellToken.approve(address(curve), _sellAmt);
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uint _slippageAmt = convert18ToDec(_buyToken.decimals(), wmul(unitAmt, convertTo18(_sellToken.decimals(), _sellAmt)));
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uint intialBal = _buyToken.balanceOf(address(this));
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curve.exchange(getTokenI(sellAddr), getTokenI(buyAddr), _sellAmt, _slippageAmt);
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uint finalBal = _buyToken.balanceOf(address(this));
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uint _buyAmt = sub(finalBal, intialBal);
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setUint(setId, _buyAmt);
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emit LogSell(buyAddr, sellAddr, _buyAmt, _sellAmt, getId, setId);
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}
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}
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contract ConnectCurveThreePool is CurveProtocol {
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string public name = "Curve-3pool-v1.0";
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}
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