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https://github.com/Instadapp/dsa-resolvers-deprecated.git
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Done with curve y resolver
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Thrilok Kumar
parent
25ac9cb464
commit
19d87d7cb2
273
contracts/protocols/curve_y.sol
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273
contracts/protocols/curve_y.sol
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pragma solidity ^0.6.0;
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pragma experimental ABIEncoderV2;
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interface ICurve {
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function get_virtual_price() external view returns (uint256 out);
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function coins(int128 tokenId) external view returns (address token);
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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_underlying(int128 sellTokenId, int128 buyTokenId, uint256 sellTokenAmt) external view returns (uint256 buyTokenAmt);
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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 view returns (uint256 amount);
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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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interface TokenInterface {
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function decimals() external view returns (uint);
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function totalSupply() external view returns (uint256);
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function balanceOf(address) external view returns (uint);
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}
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interface IStakingRewards {
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function balanceOf(address) external view returns (uint256);
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function earned(address) external view returns (uint256);
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}
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contract DSMath {
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function add(uint x, uint y) internal pure returns (uint z) {
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require((z = x + y) >= x, "math-not-safe");
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}
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function mul(uint x, uint y) internal pure returns (uint z) {
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require(y == 0 || (z = x * y) / y == x, "math-not-safe");
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}
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function sub(uint x, uint y) internal pure returns (uint z) {
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require((z = x - y) <= x, "sub-overflow");
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}
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uint constant WAD = 10 ** 18;
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function wmul(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, y), WAD / 2) / WAD;
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}
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function wdiv(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, WAD), y / 2) / y;
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}
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}
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contract CurveHelpers is 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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/**
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* @dev Return Curve y Staking Address
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*/
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function getCurveStakingAddr() internal pure returns (address) {
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return 0x0001FB050Fe7312791bF6475b96569D83F695C9f;
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}
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/**
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* @dev Return yfi reward Address
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*/
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function getYFItoken() internal pure returns (address) {
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return 0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e;
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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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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 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 getBuyUnitAmt(
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address buyAddr,
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address sellAddr,
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uint sellAmt,
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uint buyAmt,
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uint slippage
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) internal view returns (uint unitAmt) {
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uint _sellAmt = convertTo18(TokenInterface(sellAddr).decimals(), sellAmt);
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uint _buyAmt = convertTo18(TokenInterface(buyAddr).decimals(), buyAmt);
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unitAmt = wdiv(_buyAmt, _sellAmt);
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unitAmt = wmul(unitAmt, sub(WAD, slippage));
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}
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function getDepositUnitAmt(
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address token,
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uint depositAmt,
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uint curveAmt,
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uint slippage
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) internal view returns (uint unitAmt) {
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uint _depositAmt = convertTo18(TokenInterface(token).decimals(), depositAmt);
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uint _curveAmt = convertTo18(TokenInterface(getCurveTokenAddr()).decimals(), curveAmt);
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unitAmt = wdiv(_curveAmt, _depositAmt);
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unitAmt = wmul(unitAmt, sub(WAD, slippage));
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}
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function getWithdrawtUnitAmt(
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address token,
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uint withdrawAmt,
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uint curveAmt,
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uint slippage
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) internal view returns (uint unitAmt) {
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uint _withdrawAmt = convertTo18(TokenInterface(token).decimals(), withdrawAmt);
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uint _curveAmt = convertTo18(TokenInterface(getCurveTokenAddr()).decimals(), curveAmt);
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unitAmt = wdiv(_curveAmt, _withdrawAmt);
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unitAmt = wmul(unitAmt, add(WAD, slippage));
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}
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}
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contract Resolver is CurveHelpers {
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function getBuyAmount(address buyAddr, address sellAddr, uint sellAmt, uint slippage)
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public
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view
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returns (uint buyAmt, uint unitAmt, uint virtualPrice)
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{
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ICurve curve = ICurve(getCurveSwapAddr());
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buyAmt = curve.get_dy_underlying(getTokenI(sellAddr), getTokenI(buyAddr), sellAmt);
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virtualPrice = curve.get_virtual_price();
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unitAmt = getBuyUnitAmt(buyAddr, sellAddr, sellAmt, buyAmt, slippage);
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}
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function getDepositAmount(address token, uint depositAmt, uint slippage)
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public
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view
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returns (uint curveAmt, uint unitAmt, uint virtualPrice)
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{
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uint sharePrice = YTokenInterface(getYtoken(token)).getPricePerFullShare();
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uint yAmt = wdiv(depositAmt, sharePrice);
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uint[4] memory amts;
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amts[uint(getTokenI(token))] = yAmt;
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ICurve curve = ICurve(getCurveSwapAddr());
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curveAmt = curve.calc_token_amount(amts, true);
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virtualPrice = curve.get_virtual_price();
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unitAmt = getDepositUnitAmt(token, yAmt, curveAmt, slippage);
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}
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function getWithdrawAmount(address token, uint withdrawAmt, uint slippage)
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public
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view
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returns (uint curveAmt, uint unitAmt, uint virtualPrice)
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{
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uint sharePrice = YTokenInterface(getYtoken(token)).getPricePerFullShare();
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uint yAmt = wdiv(withdrawAmt, sharePrice);
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uint[4] memory amts;
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amts[uint(getTokenI(token))] = yAmt;
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ICurve curve = ICurve(getCurveSwapAddr());
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curveAmt = curve.calc_token_amount(amts, false);
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virtualPrice = curve.get_virtual_price();
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unitAmt = getWithdrawtUnitAmt(token, yAmt, curveAmt, slippage);
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}
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function getWithdrawTokenAmount(address token, uint curveAmt, uint slippage)
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public
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view
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returns (uint tokenAmt, uint unitAmt, uint virtualPrice)
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{
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tokenAmt = ICurveZap(getCurveZapAddr()).calc_withdraw_one_coin(curveAmt, getTokenI(token));
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virtualPrice = ICurve(getCurveSwapAddr()).get_virtual_price();
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unitAmt = getWithdrawtUnitAmt(token, tokenAmt, curveAmt, slippage);
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}
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function getPosition(
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address user
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) public view returns (
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uint userBal,
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uint totalSupply,
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uint virtualPrice,
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uint userShare,
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uint poolyDaiBal,
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uint poolyUsdcBal,
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uint poolyUsdtBal,
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uint poolyTusdBal,
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uint stakedBal,
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uint rewardsEarned,
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uint yfiBal
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) {
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TokenInterface curveToken = TokenInterface(getCurveTokenAddr());
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userBal = curveToken.balanceOf(user);
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totalSupply = curveToken.totalSupply();
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userShare = wdiv(userBal, totalSupply);
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ICurve curveContract = ICurve(getCurveSwapAddr());
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virtualPrice = curveContract.get_virtual_price();
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poolyDaiBal = TokenInterface(curveContract.coins(0)).balanceOf(getCurveSwapAddr());
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poolyUsdcBal = TokenInterface(curveContract.coins(1)).balanceOf(getCurveSwapAddr());
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poolyUsdtBal = TokenInterface(curveContract.coins(2)).balanceOf(getCurveSwapAddr());
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poolyTusdBal = TokenInterface(curveContract.coins(3)).balanceOf(getCurveSwapAddr());
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// Staking Details.
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(stakedBal, rewardsEarned, yfiBal) = getStakingPosition(user);
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}
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function getStakingPosition(address user) public view returns (
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uint stakedBal,
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uint rewardsEarned,
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uint yfiBal
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) {
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IStakingRewards stakingContract = IStakingRewards(getCurveStakingAddr());
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stakedBal = stakingContract.balanceOf(user);
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rewardsEarned = stakingContract.earned(user);
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yfiBal = TokenInterface(getYFItoken()).balanceOf(user);
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}
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}
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contract InstaCurveYResolver is Resolver {
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string public constant name = "Curve-Y-Resolver-v1.1";
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}
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