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https://github.com/Instadapp/dsa-connectors-old.git
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Merge branch 'master' of github.com:InstaDApp/dsa-connectors
This commit is contained in:
Thrilok Kumar
commit
c4a58a1fea
245
contracts/connectors/curvey.sol
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245
contracts/connectors/curvey.sol
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pragma solidity ^0.6.0;
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// import files from common directory
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import { TokenInterface , MemoryInterface, EventInterface} 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 calc_token_amount(uint256[4] calldata amounts, bool deposit) external view returns (uint256 amount);
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function get_dy(int128 sellTokenId, int128 buyTokenId, uint256 sellTokenAmt) external returns (uint256 buyTokenAmt);
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function exchange_underlying(int128 sellTokenId, int128 buyTokenId, uint256 sellTokenAmt, uint256 minBuyToken) external;
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function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount) external;
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function remove_liquidity_imbalance(uint256[4] calldata amounts, uint256 max_burn_amount) external;
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}
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interface ICurveZap {
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function calc_withdraw_one_coin(uint256 _token_amount, int128 i) external returns (uint256 amount);
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function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount) external;
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function remove_liquidity_imbalance(uint256[4] calldata amounts, uint256 max_burn_amount) external;
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}
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interface YTokenInterface {
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function getPricePerFullShare() external view returns (uint256 amount);
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}
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contract CurveHelpers is Stores, DSMath {
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/**
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* @dev Return ycurve Swap Address
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*/
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function getCurveSwapAddr() internal pure returns (address) {
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return 0x45F783CCE6B7FF23B2ab2D70e416cdb7D6055f51;
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}
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/**
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* @dev Return ycurve zap Address
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*/
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function getCurveZapAddr() internal pure returns (address) {
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return 0xbBC81d23Ea2c3ec7e56D39296F0cbB648873a5d3;
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}
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/**
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* @dev Return Curve Token Address
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*/
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function getCurveTokenAddr() internal pure returns (address) {
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return 0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8;
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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 if (token == address(0x0000000000085d4780B73119b644AE5ecd22b376)) {
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// USDT Token
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i = 3;
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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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function getYtoken(address token) internal pure returns (address yTkn) {
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if (token == address(0x6B175474E89094C44Da98b954EedeAC495271d0F)) {
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// DAI Token
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yTkn = 0x16de59092dAE5CcF4A1E6439D611fd0653f0Bd01;
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} else if (token == address(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48)) {
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// USDC Token
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yTkn = 0xd6aD7a6750A7593E092a9B218d66C0A814a3436e;
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} else if (token == address(0xdAC17F958D2ee523a2206206994597C13D831ec7)) {
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// USDT Token
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yTkn = 0x83f798e925BcD4017Eb265844FDDAbb448f1707D;
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} else if (token == address(0x0000000000085d4780B73119b644AE5ecd22b376)) {
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// USDT Token
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yTkn = 0x73a052500105205d34Daf004eAb301916DA8190f;
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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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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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event LogDeposit(address token, uint256 amt, uint256 mintAmt, uint256 getId, uint256 setId);
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event LogWithdraw(address token, uint256 amt, uint256 burnAmt, uint256 getId, uint256 setId);
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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_underlying(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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bytes32 _eventCode = keccak256("LogSell(address,address,uint256,uint256,uint256,uint256)");
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bytes memory _eventParam = abi.encode(buyAddr, sellAddr, _buyAmt, _sellAmt, getId, setId);
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emitEvent(_eventCode, _eventParam);
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}
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/**
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* @dev Deposit Token.
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* @param token token address.
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* @param amt token amount.
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* @param unitAmt unit amount of curve_amt/token_amt 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 deposit(
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address token,
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uint amt,
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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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uint256 _amt = getUint(getId, amt);
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TokenInterface tokenContract = TokenInterface(token);
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_amt = _amt == uint(-1) ? tokenContract.balanceOf(address(this)) : _amt;
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uint[4] memory _amts;
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_amts[uint(getTokenI(token))] = _amt;
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tokenContract.approve(getCurveZapAddr(), _amt);
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uint _amt18 = convertTo18(tokenContract.decimals(), _amt);
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uint _slippageAmt = wmul(unitAmt, _amt18);
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TokenInterface curveTokenContract = TokenInterface(getCurveTokenAddr());
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uint initialCurveBal = curveTokenContract.balanceOf(address(this));
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ICurve(getCurveSwapAddr()).add_liquidity(_amts, _slippageAmt);
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uint finalCurveBal = curveTokenContract.balanceOf(address(this));
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uint mintAmt = sub(finalCurveBal, initialCurveBal);
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setUint(setId, mintAmt);
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emit LogDeposit(token, _amt, mintAmt, getId, setId);
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bytes32 _eventCode = keccak256("LogDeposit(address,uint256,uint256,uint256,uint256)");
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bytes memory _eventParam = abi.encode(token, _amt, mintAmt, getId, setId);
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emitEvent(_eventCode, _eventParam);
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}
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/**
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* @dev Withdraw Token.
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* @param token token address.
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* @param amt token amount.
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* @param unitAmt unit amount of curve_amt/token_amt 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 withdraw(
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address token,
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uint256 amt,
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uint256 unitAmt,
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uint getId,
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uint setId
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) external payable {
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uint _amt = getUint(getId, amt);
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int128 tokenId = getTokenI(token);
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TokenInterface curveTokenContract = TokenInterface(getCurveTokenAddr());
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ICurveZap curveZap = ICurveZap(getCurveZapAddr());
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ICurve curveSwap = ICurve(getCurveSwapAddr());
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uint _curveAmt;
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uint[4] memory _amts;
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if (_amt == uint(-1)) {
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_curveAmt = curveTokenContract.balanceOf(address(this));
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_amt = curveZap.calc_withdraw_one_coin(_curveAmt, tokenId);
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_amts[uint(tokenId)] = _amt;
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} else {
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_amts[uint(tokenId)] = _amt;
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_curveAmt = curveSwap.calc_token_amount(_amts, false);
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}
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uint _amt18 = convertTo18(TokenInterface(token).decimals(), _amt);
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uint _slippageAmt = wmul(unitAmt, _amt18);
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curveTokenContract.approve(address(curveZap), 0);
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curveTokenContract.approve(address(curveZap), _slippageAmt);
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curveZap.remove_liquidity_imbalance(_amts, _slippageAmt);
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setUint(setId, _amt);
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emit LogWithdraw(token, _amt, _curveAmt, getId, setId);
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bytes32 _eventCode = keccak256("LogWithdraw(address,uint256,uint256,uint256,uint256)");
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bytes memory _eventParam = abi.encode(token, _amt, _curveAmt, getId, setId);
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emitEvent(_eventCode, _eventParam);
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}
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}
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contract ConnectCurveY is CurveProtocol {
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string public name = "Curve-y-v1";
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}
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