From 2fe777f569e34f56d2134117cf89db449d40fbd7 Mon Sep 17 00:00:00 2001 From: Andre Cronje Date: Sun, 25 Oct 2020 15:18:56 +0200 Subject: [PATCH] Curve Deposit interface StrategyCurveGUSDProxyV2 Signed-off-by: Andre Cronje --- .../strategies/StrategyCurveGUSDProxyV2.sol | 229 ++++++++++++++++++ interfaces/curve/Curve.sol | 5 + 2 files changed, 234 insertions(+) create mode 100644 contracts/strategies/StrategyCurveGUSDProxyV2.sol diff --git a/contracts/strategies/StrategyCurveGUSDProxyV2.sol b/contracts/strategies/StrategyCurveGUSDProxyV2.sol new file mode 100644 index 00000000..727e8e22 --- /dev/null +++ b/contracts/strategies/StrategyCurveGUSDProxyV2.sol @@ -0,0 +1,229 @@ +// SPDX-License-Identifier: MIT + +pragma solidity ^0.5.17; + +import "@openzeppelinV2/contracts/token/ERC20/IERC20.sol"; +import "@openzeppelinV2/contracts/math/SafeMath.sol"; +import "@openzeppelinV2/contracts/utils/Address.sol"; +import "@openzeppelinV2/contracts/token/ERC20/SafeERC20.sol"; + +import "../../interfaces/yearn/IController.sol"; +import "../../interfaces/curve/Gauge.sol"; +import "../../interfaces/curve/Mintr.sol"; +import "../../interfaces/uniswap/Uni.sol"; +import "../../interfaces/curve/Curve.sol"; +import "../../interfaces/yearn/IToken.sol"; +import "../../interfaces/yearn/IVoterProxy.sol"; + +contract StrategyCurveGUSDProxyV2 { + using SafeERC20 for IERC20; + using Address for address; + using SafeMath for uint256; + + address public constant want = address(0x056Fd409E1d7A124BD7017459dFEa2F387b6d5Cd); // GUSD + address public constant gusd3CRV = address(0xD2967f45c4f384DEEa880F807Be904762a3DeA07); + address public constant crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52); + address public constant uni = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); + address public constant weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2); // used for crv <> weth <> dai route + + address public constant dai = address(0x6B175474E89094C44Da98b954EedeAC495271d0F); + ICurveDeposit public constant curveDeposit = ICurveDeposit(0x0aE274c98c0415C0651AF8cF52b010136E4a0082); + + address public constant gauge = address(0xC5cfaDA84E902aD92DD40194f0883ad49639b023); + address public constant voter = address(0xF147b8125d2ef93FB6965Db97D6746952a133934); + + ICurveFi public constant SWAP = ICurveFi(0x4f062658EaAF2C1ccf8C8e36D6824CDf41167956); + + uint256 public keepCRV = 1000; + uint256 public performanceFee = 450; + uint256 public strategistReward = 50; + uint256 public withdrawalFee = 50; + uint256 public constant FEE_DENOMINATOR = 10000; + + address public proxy; + + address public governance; + address public controller; + address public strategist; + + uint256 public earned; // lifetime strategy earnings denominated in `want` token + + event Harvested(uint wantEarned, uint lifetimeEarned); + + constructor(address _controller, address _governance, address _proxy) public { + governance = _governance; + strategist = msg.sender; + controller = _controller; + proxy = _proxy; + } + + function getName() external pure returns (string memory) { + return "StrategyCurveGUSDProxyV2"; + } + + function setStrategist(address _strategist) external { + require(msg.sender == governance || msg.sender == strategist, "!authorized"); + strategist = _strategist; + } + + function setKeepCRV(uint256 _keepCRV) external { + require(msg.sender == governance, "!governance"); + keepCRV = _keepCRV; + } + + function setWithdrawalFee(uint256 _withdrawalFee) external { + require(msg.sender == governance, "!governance"); + withdrawalFee = _withdrawalFee; + } + + function setPerformanceFee(uint256 _performanceFee) external { + require(msg.sender == governance, "!governance"); + performanceFee = _performanceFee; + } + + function setStrategistReward(uint _strategistReward) external { + require(msg.sender == governance, "!governance"); + strategistReward = _strategistReward; + } + + function setProxy(address _proxy) external { + require(msg.sender == governance, "!governance"); + proxy = _proxy; + } + + function deposit() public { + uint _want = IERC20(want).balanceOf(address(this)); + if (_want > 0) { + IERC20(want).safeApprove(address(curveDeposit), 0); + IERC20(want).safeApprove(address(curveDeposit), _want); + curveDeposit.add_liquidity([_want,0,0,0], 0); // Dangerous to not add a min_mint_amount + } + uint256 _gusd3CRV = IERC20(gusd3CRV).balanceOf(address(this)); + if (_gusd3CRV > 0) { + IERC20(gusd3CRV).safeTransfer(proxy, _gusd3CRV); + IVoterProxy(proxy).deposit(gauge, gusd3CRV); + } + } + + // Controller only function for creating additional rewards from dust + function withdraw(IERC20 _asset) external returns (uint256 balance) { + require(msg.sender == controller, "!controller"); + require(want != address(_asset), "want"); + require(gusd3CRV != address(_asset), "gusd3CRV"); + require(crv != address(_asset), "crv"); + require(dai != address(_asset), "dai"); + balance = _asset.balanceOf(address(this)); + _asset.safeTransfer(controller, balance); + } + + // Withdraw partial funds, normally used with a vault withdrawal + function withdraw(uint256 _amount) external { + require(msg.sender == controller, "!controller"); + uint256 _balance = IERC20(want).balanceOf(address(this)); + if (_balance < _amount) { + _amount = _withdrawSome(_amount.sub(_balance)); + _amount = _amount.add(_balance); + } + + uint256 _fee = _amount.mul(withdrawalFee).div(FEE_DENOMINATOR); + + IERC20(want).safeTransfer(IController(controller).rewards(), _fee); + address _vault = IController(controller).vaults(address(want)); + require(_vault != address(0), "!vault"); // additional protection so we don't burn the funds + IERC20(want).safeTransfer(_vault, _amount.sub(_fee)); + } + + function _withdrawSome(uint256 _amount) internal returns (uint256) { + uint _toWithdraw = _amount.mul(1e16).mul(1e18).div(SWAP.get_virtual_price()); + uint _withdrawn = VoterProxy(proxy).withdraw(gauge, gusd3CRV, _toWithdraw); + IERC20(gusd3CRV).safeApprove(address(curveDeposit), 0); + IERC20(gusd3CRV).safeApprove(address(curveDeposit), _withdrawn); + uint _before = IERC20(want).balanceOf(address(this)); + curveDeposit.remove_liquidity_one_coin(_withdrawn, 0, 0); // Need a withdraw fallback, but GUSD needs more liquidity first + uint _after = IERC20(want).balanceOf(address(this)); + return _after.sub(_before); + } + + // Withdraw all funds, normally used when migrating strategies + function withdrawAll() external returns (uint256 balance) { + require(msg.sender == controller, "!controller"); + _withdrawAll(); + + balance = IERC20(want).balanceOf(address(this)); + + address _vault = IController(controller).vaults(address(want)); + require(_vault != address(0), "!vault"); // additional protection so we don't burn the funds + IERC20(want).safeTransfer(_vault, balance); + } + + function _withdrawAll() internal { + IVoterProxy(proxy).withdrawAll(gauge, gusd3CRV); + IERC20(gusd3CRV).safeApprove(address(curveDeposit), 0); + IERC20(gusd3CRV).safeApprove(address(curveDeposit), IERC20(gusd3CRV).balanceOf(address(this))); + curveDeposit.remove_liquidity_one_coin(IERC20(gusd3CRV).balanceOf(address(this)), 0, 0); // Can have massive slippage, incredibly dangerous + } + + function harvest() public { + require(msg.sender == strategist || msg.sender == governance || msg.sender == tx.origin, "!authorized"); + IVoterProxy(proxy).harvest(gauge); + uint256 _crv = IERC20(crv).balanceOf(address(this)); + if (_crv > 0) { + uint256 _keepCRV = _crv.mul(keepCRV).div(FEE_DENOMINATOR); + IERC20(crv).safeTransfer(voter, _keepCRV); + _crv = _crv.sub(_keepCRV); + + IERC20(crv).safeApprove(uni, 0); + IERC20(crv).safeApprove(uni, _crv); + + address[] memory path = new address[](3); + path[0] = crv; + path[1] = weth; + path[2] = dai; + + Uni(uni).swapExactTokensForTokens(_crv, uint256(0), path, address(this), now.add(1800)); + } + uint256 _dai = IERC20(dai).balanceOf(address(this)); + if (_dai > 0) { + IERC20(dai).safeApprove(address(curveDeposit), 0); + IERC20(dai).safeApprove(address(curveDeposit), _dai); + curveDeposit.add_liquidity([0, _dai, 0, 0], 0); + } + uint256 _gusd3CRV = IERC20(gusd3CRV).balanceOf(address(this)); + if (_gusd3CRV > 0) { + uint256 _fee = _gusd3CRV.mul(performanceFee).div(FEE_DENOMINATOR); + uint256 _reward = _gusd3CRV.mul(strategistReward).div(FEE_DENOMINATOR); + IERC20(gusd3CRV).safeTransfer(IController(controller).rewards(), _fee); + IERC20(gusd3CRV).safeTransfer(strategist, _reward); + deposit(); + } + IVoterProxy(proxy).lock(); + earned = earned.add(_gusd3CRV); + emit Harvested(_gusd3CRV, earned); + } + + function balanceOfWant() public view returns (uint256) { + return IERC20(want).balanceOf(address(this)); + } + + function balanceOfPoolInWant() public view returns (uint256) { + return (balanceOfPool().mul(SWAP.get_virtual_price()).div(1e18)).div(1e16); + } + + function balanceOfPool() public view returns (uint256) { + return VoterProxy(proxy).balanceOf(gauge); + } + + function balanceOf() public view returns (uint256) { + return balanceOfWant().add(balanceOfPoolInWant()); + } + + function setGovernance(address _governance) external { + require(msg.sender == governance, "!governance"); + governance = _governance; + } + + function setController(address _controller) external { + require(msg.sender == governance, "!governance"); + controller = _controller; + } +} diff --git a/interfaces/curve/Curve.sol b/interfaces/curve/Curve.sol index 8224da58..639dddf5 100644 --- a/interfaces/curve/Curve.sol +++ b/interfaces/curve/Curve.sol @@ -36,3 +36,8 @@ interface Zap { uint256 ) external; } + +interface ICurveDeposit { + function add_liquidity(uint[4] calldata, uint) external; + function remove_liquidity_one_coin(uint, int128, uint) external; +}