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StrategyDForceUSDT.sol
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StrategyDForceUSDT.sol
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// 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/dforce/Rewards.sol";
import "../../interfaces/dforce/Token.sol";
import "../../interfaces/uniswap/Uni.sol";
import "../../interfaces/yearn/Controller.sol";
contract StrategyDForceUSDT {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address constant public want = address(0xdAC17F958D2ee523a2206206994597C13D831ec7);
address constant public d = address(0x868277d475E0e475E38EC5CdA2d9C83B5E1D9fc8);
address constant public pool = address(0x324EebDAa45829c6A8eE903aFBc7B61AF48538df);
address constant public df = address(0x431ad2ff6a9C365805eBaD47Ee021148d6f7DBe0);
address constant public uni = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address constant public weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2); // used for df <> weth <> usdc route
uint public performanceFee = 5000;
uint constant public performanceMax = 10000;
uint public withdrawalFee = 50;
uint constant public withdrawalMax = 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 "StrategyDForceUSDT";
}
function setStrategist(address _strategist) external {
require(msg.sender == governance, "!governance");
strategist = _strategist;
}
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(d, 0);
IERC20(want).safeApprove(d, _want);
dERC20(d).mint(address(this), _want);
}
uint _d = IERC20(d).balanceOf(address(this));
if (_d > 0) {
IERC20(d).safeApprove(pool, 0);
IERC20(d).safeApprove(pool, _d);
dRewards(pool).stake(_d);
}
}
// 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(d != address(_asset), "d");
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(Controller(controller).rewards(), _fee);
address _vault = Controller(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 = Controller(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 {
dRewards(pool).exit();
uint _d = IERC20(d).balanceOf(address(this));
if (_d > 0) {
dERC20(d).redeem(address(this),_d);
}
}
function harvest() public {
require(msg.sender == strategist || msg.sender == governance, "!authorized");
dRewards(pool).getReward();
uint _df = IERC20(df).balanceOf(address(this));
if (_df > 0) {
IERC20(df).safeApprove(uni, 0);
IERC20(df).safeApprove(uni, _df);
address[] memory path = new address[](3);
path[0] = df;
path[1] = weth;
path[2] = want;
Uni(uni).swapExactTokensForTokens(_df, uint(0), path, address(this), now.add(1800));
}
uint _want = IERC20(want).balanceOf(address(this));
if (_want > 0) {
uint _fee = _want.mul(performanceFee).div(performanceMax);
IERC20(want).safeTransfer(Controller(controller).rewards(), _fee);
deposit();
}
}
function _withdrawSome(uint256 _amount) internal returns (uint) {
uint _d = _amount.mul(1e18).div(dERC20(d).getExchangeRate());
uint _before = IERC20(d).balanceOf(address(this));
dRewards(pool).withdraw(_d);
uint _after = IERC20(d).balanceOf(address(this));
uint _withdrew = _after.sub(_before);
_before = IERC20(want).balanceOf(address(this));
dERC20(d).redeem(address(this), _withdrew);
_after = IERC20(want).balanceOf(address(this));
_withdrew = _after.sub(_before);
return _withdrew;
}
function balanceOfWant() public view returns (uint) {
return IERC20(want).balanceOf(address(this));
}
function balanceOfPool() public view returns (uint) {
return (dRewards(pool).balanceOf(address(this))).mul(dERC20(d).getExchangeRate()).div(1e18);
}
function getExchangeRate() public view returns (uint) {
return dERC20(d).getExchangeRate();
}
function balanceOfD() public view returns (uint) {
return dERC20(d).getTokenBalance(address(this));
}
function balanceOf() public view returns (uint) {
return balanceOfWant()
.add(balanceOfD())
.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;
}
}