Strategy[CurveSBTC]: 2020-08-26

https://etherscan.io/address/0x4FEeaecED575239b46d70b50E13532ECB62e4ea8#code

contracts/strategies/StrategyCurveSBTC.sol

@@ -0,0 +1,191 @@
+// 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/curve/Curve.sol";
+import "../../interfaces/curve/Gauge.sol";
+import "../../interfaces/uniswap/Uni.sol";
+
+import "../../interfaces/yearn/IController.sol";
+import "../../interfaces/yearn/Mintr.sol";
+import "../../interfaces/yearn/Token.sol";
+
+contract StrategyCurveSBTC {
+    using SafeERC20 for IERC20;
+    using Address for address;
+    using SafeMath for uint256;
+
+    address constant public want = address(0x075b1bb99792c9E1041bA13afEf80C91a1e70fB3);
+    address constant public pool = address(0x705350c4BcD35c9441419DdD5d2f097d7a55410F);
+    address constant public mintr = address(0xd061D61a4d941c39E5453435B6345Dc261C2fcE0);
+    address constant public crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
+    address constant public uni = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
+    address constant public weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2); // used for crv <> weth <> wbtc route
+
+    address constant public wbtc = address(0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599);
+    address constant public curve = address(0x7fC77b5c7614E1533320Ea6DDc2Eb61fa00A9714);
+
+    uint public performanceFee = 500;
+    uint constant public performanceMax = 10000;
+
+    uint public withdrawalFee = 50;
+    uint constant public withdrawalMax = 10000;
+
+    uint public keepCRV = 1000;
+    uint constant public keepCRVMax = 10000;
+
+    address public governance;
+    address public controller;
+    address public strategist;
+
+    constructor(address _controller) public {
+        governance = msg.sender;
+        strategist = msg.sender;
+        controller = _controller;
+    }
+
+    function getName() external pure returns (string memory) {
+        return "StrategyCurveSBTC";
+    }
+
+    function setStrategist(address _strategist) external {
+        require(msg.sender == governance, "!governance");
+        strategist = _strategist;
+    }
+
+    function setKeepCRV(uint _keepCRV) external {
+        require(msg.sender == governance, "!governance");
+        keepCRV = _keepCRV;
+    }
+
+    function setWithdrawalFee(uint _withdrawalFee) external {
+        require(msg.sender == governance, "!governance");
+        withdrawalFee = _withdrawalFee;
+    }
+
+    function setPerformanceFee(uint _performanceFee) external {
+        require(msg.sender == governance, "!governance");
+        performanceFee = _performanceFee;
+    }
+
+    function deposit() public {
+        uint _want = IERC20(want).balanceOf(address(this));
+        if (_want > 0) {
+            IERC20(want).safeApprove(pool, 0);
+            IERC20(want).safeApprove(pool, _want);
+            Gauge(pool).deposit(_want);
+        }
+    }
+
+    // Controller only function for creating additional rewards from dust
+    function withdraw(IERC20 _asset) external returns (uint balance) {
+        require(msg.sender == controller, "!controller");
+        require(want != address(_asset), "want");
+        require(wbtc != address(_asset), "wbtc");
+        require(crv != address(_asset), "crv");
+        balance = _asset.balanceOf(address(this));
+        _asset.safeTransfer(controller, balance);
+    }
+
+    // Withdraw partial funds, normally used with a vault withdrawal
+    function withdraw(uint _amount) external {
+        require(msg.sender == controller, "!controller");
+        uint _balance = IERC20(want).balanceOf(address(this));
+        if (_balance < _amount) {
+            _amount = _withdrawSome(_amount.sub(_balance));
+            _amount = _amount.add(_balance);
+        }
+
+        uint _fee = _amount.mul(withdrawalFee).div(withdrawalMax);
+
+        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));
+    }
+
+    // Withdraw all funds, normally used when migrating strategies
+    function withdrawAll() external returns (uint 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 {
+        Gauge(pool).withdraw(Gauge(pool).balanceOf(address(this)));
+    }
+
+    function harvest() public {
+        require(msg.sender == strategist || msg.sender == governance, "!authorized");
+        Mintr(mintr).mint(pool);
+        uint _crv = IERC20(crv).balanceOf(address(this));
+
+        uint _keepCRV = _crv.mul(keepCRV).div(keepCRVMax);
+        IERC20(crv).safeTransfer(IController(controller).rewards(), _keepCRV);
+        _crv = _crv.sub(_keepCRV);
+
+        if (_crv > 0) {
+            IERC20(crv).safeApprove(uni, 0);
+            IERC20(crv).safeApprove(uni, _crv);
+
+            address[] memory path = new address[](3);
+            path[0] = crv;
+            path[1] = weth;
+            path[2] = wbtc;
+
+            Uni(uni).swapExactTokensForTokens(_crv, uint(0), path, address(this), now.add(1800));
+        }
+        uint _wbtc = IERC20(wbtc).balanceOf(address(this));
+        if (_wbtc > 0) {
+            IERC20(wbtc).safeApprove(curve, 0);
+            IERC20(wbtc).safeApprove(curve, _wbtc);
+            ICurveFi(curve).add_liquidity([0,_wbtc,0],0);
+        }
+        uint _want = IERC20(want).balanceOf(address(this));
+        if (_want > 0) {
+            uint _fee = _want.mul(performanceFee).div(performanceMax);
+            IERC20(want).safeTransfer(IController(controller).rewards(), _fee);
+            deposit();
+        }
+    }
+
+    function _withdrawSome(uint256 _amount) internal returns (uint) {
+        Gauge(pool).withdraw(_amount);
+        return _amount;
+    }
+
+    function balanceOfWant() public view returns (uint) {
+        return IERC20(want).balanceOf(address(this));
+    }
+
+    function balanceOfPool() public view returns (uint) {
+        return Gauge(pool).balanceOf(address(this));
+    }
+
+    function balanceOf() public view returns (uint) {
+        return balanceOfWant()
+               .add(balanceOfPool());
+    }
+
+    function setGovernance(address _governance) external {
+        require(msg.sender == governance, "!governance");
+        governance = _governance;
+    }
+
+    function setController(address _controller) external {
+        require(msg.sender == governance, "!governance");
+        controller = _controller;
+    }
+}

interfaces/curve/Curve.sol

@@ -5,7 +5,11 @@ pragma solidity ^0.5.17;
 interface ICurveFi {
 
   function get_virtual_price() external view returns (uint);
-  function add_liquidity(
+  function add_liquidity( // sBTC pool
+    uint256[3] calldata amounts,
+    uint256 min_mint_amount
+  ) external;
+  function add_liquidity( // bUSD pool
     uint256[4] calldata amounts,
     uint256 min_mint_amount
   ) external;