Address Contract Partially Verified
Address
0x2De055fec2b826ed4A7478CeDDBefF82C1EdFA70
Balance
0 ETH
Nonce
1
Code Size
12445 bytes
Creator
0x2D407dDb...d45C at tx 0xd35257d8...37c7b6
Last Active
Indexed Transactions
23 (10,613,474 → 10,623,932)
Gas Used (indexed)
9,865,135
Contract Bytecode
12445 bytes
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Verified Source Code Partial Match
Compiler: v0.5.17+commit.d19bba13
EVM: istanbul
Optimization: No
StrategyYfii.sol 303 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function decimals() external view returns (uint);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
interface Controller {
function vaults(address) external view returns (address);
function rewards() external view returns (address);
}
/*
A strategy must implement the following calls;
- deposit()
- withdraw(address) must exclude any tokens used in the yield - Controller role - withdraw should return to Controller
- withdraw(uint) - Controller | Vault role - withdraw should always return to vault
- withdrawAll() - Controller | Vault role - withdraw should always return to vault
- balanceOf()
Where possible, strategies must remain as immutable as possible, instead of updating variables, we update the contract by linking it in the controller
*/
interface Yfii {
function withdraw(uint) external;
function getReward() external;
function stake(uint) external;
function balanceOf(address) external view returns (uint);
function exit() external;
}
contract Balancer {
function joinPool(uint poolAmountOut, uint[] calldata maxAmountsIn) external;
function exitPool(uint poolAmountIn, uint[] calldata minAmountsOut) external;
function swapExactAmountIn(
address tokenIn,
uint tokenAmountIn,
address tokenOut,
uint minAmountOut,
uint maxPrice
) external returns (uint tokenAmountOut, uint spotPriceAfter);
function swapExactAmountOut(
address tokenIn,
uint maxAmountIn,
address tokenOut,
uint tokenAmountOut,
uint maxPrice
) external returns (uint tokenAmountIn, uint spotPriceAfter);
function joinswapExternAmountIn(address tokenIn, uint tokenAmountIn, uint minPoolAmountOut) external returns (uint poolAmountOut);
function exitswapPoolAmountIn(address tokenOut, uint poolAmountIn, uint minAmountOut) external returns (uint tokenAmountOut);
}
interface yERC20 {
function deposit(uint256 _amount) external;
function withdraw(uint256 _amount) external;
}
interface ICurveFi {
function get_virtual_price() external view returns (uint);
function add_liquidity(
uint256[4] calldata amounts,
uint256 min_mint_amount
) external;
function remove_liquidity_imbalance(
uint256[4] calldata amounts,
uint256 max_burn_amount
) external;
function remove_liquidity(
uint256 _amount,
uint256[4] calldata amounts
) external;
function exchange(
int128 from, int128 to, uint256 _from_amount, uint256 _min_to_amount
) external;
}
contract StrategyYfii {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address constant public want = address(0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8);
address constant public pool = address(0xb81D3cB2708530ea990a287142b82D058725C092);
address constant public yfii = address(0xa1d0E215a23d7030842FC67cE582a6aFa3CCaB83);
address constant public balancer = address(0x16cAC1403377978644e78769Daa49d8f6B6CF565);
address constant public curve = address(0x45F783CCE6B7FF23B2ab2D70e416cdb7D6055f51);
address constant public dai = address(0x6B175474E89094C44Da98b954EedeAC495271d0F);
address constant public ydai = address(0x16de59092dAE5CcF4A1E6439D611fd0653f0Bd01);
uint constant public fee = 50;
uint constant public max = 10000;
address public governance;
address public controller;
constructor(address _controller) public {
governance = msg.sender;
controller = _controller;
}
function deposit() external {
IERC20(want).safeApprove(pool, 0);
IERC20(want).safeApprove(pool, IERC20(want).balanceOf(address(this)));
Yfii(pool).stake(IERC20(want).balanceOf(address(this)));
}
// 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");
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);
}
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);
}
// 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 {
Yfii(pool).exit();
}
function harvest() public {
Yfii(pool).getReward();
IERC20(yfii).safeApprove(balancer, 0);
IERC20(yfii).safeApprove(balancer, IERC20(yfii).balanceOf(address(this)));
Balancer(balancer).swapExactAmountIn(yfii, IERC20(yfii).balanceOf(address(this)), dai, 0, uint(-1));
IERC20(dai).safeApprove(ydai, 0);
IERC20(dai).safeApprove(ydai, IERC20(dai).balanceOf(address(this)));
yERC20(ydai).deposit(IERC20(dai).balanceOf(address(this)));
IERC20(ydai).safeApprove(curve, 0);
IERC20(ydai).safeApprove(curve, IERC20(ydai).balanceOf(address(this)));
uint _before = IERC20(want).balanceOf(address(this));
ICurveFi(curve).add_liquidity([IERC20(ydai).balanceOf(address(this)),0,0,0],0);
uint _after = IERC20(want).balanceOf(address(this));
uint _fee = _after.sub(_before).mul(fee).div(max);
IERC20(want).safeTransfer(Controller(controller).rewards(), _fee);
IERC20(want).safeApprove(pool, 0);
IERC20(want).safeApprove(pool, IERC20(want).balanceOf(address(this)));
Yfii(pool).stake(IERC20(want).balanceOf(address(this)));
}
function _withdrawSome(uint256 _amount) internal returns (uint) {
Yfii(pool).withdraw(_amount);
return _amount;
}
function balanceOfCurve() public view returns (uint) {
return IERC20(want).balanceOf(address(this));
}
function balanceOfYfii() public view returns (uint) {
return Yfii(pool).balanceOf(address(this));
}
function balanceOf() public view returns (uint) {
return balanceOfCurve()
.add(balanceOfYfii());
}
function setGovernance(address _governance) external {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function setController(address _controller) external {
require(msg.sender == governance, "!governance");
controller = _controller;
}
}
Read Contract
balanceOf 0x722713f7 → uint256
balanceOfCurve 0x4e0212ab → uint256
balanceOfYfii 0xfd0afef7 → uint256
balancer 0xe563037e → address
controller 0xf77c4791 → address
curve 0x7165485d → address
dai 0xf4b9fa75 → address
fee 0xddca3f43 → uint256
governance 0x5aa6e675 → address
max 0x6ac5db19 → uint256
pool 0x16f0115b → address
want 0x1f1fcd51 → address
ydai 0x366cd4f3 → address
yfii 0xd2a9d862 → address
Write Contract 7 functions
These functions modify contract state and require a wallet transaction to execute.
deposit 0xd0e30db0
No parameters
harvest 0x4641257d
No parameters
setController 0x92eefe9b
address _controller
setGovernance 0xab033ea9
address _governance
withdraw 0x2e1a7d4d
uint256 _amount
withdraw 0x51cff8d9
address _asset
returns: uint256
withdrawAll 0x853828b6
No parameters
returns: uint256
Top Interactions
| Address | Txns | Sent | Received |
|---|---|---|---|
| 0x2D407dDb...d45C | 10 | 10 |
Recent Transactions
|
| Hash | Block | Age | From/To | Value | |
|---|---|---|---|---|---|
| 0xd0873f5d...db48bf | 10,623,932 | IN | 0x2D407dDb...d45C | 0 ETH | |
| 0x9ca0f4e1...4e4119 | 10,623,565 | IN | 0x2D407dDb...d45C | 0 ETH | |
| 0x5c056663...ffc716 | 10,621,076 | IN | 0x2D407dDb...d45C | 0 ETH | |
| 0x4ec16abb...5ca0c3 | 10,620,144 | IN | 0x2D407dDb...d45C | 0 ETH | |
| 0xa595d364...9ef78b | 10,619,980 | IN | 0x2D407dDb...d45C | 0 ETH | |
| 0x98dfe75a...df5aef | 10,619,008 | IN | 0x2D407dDb...d45C | 0 ETH | |
| 0x73671353...e68cf9 | 10,617,392 | IN | 0x2D407dDb...d45C | 0 ETH | |
| 0x09df7d6d...995207 | 10,614,574 | IN | 0x2D407dDb...d45C | 0 ETH | |
| 0xf8ef0006...6f0b87 | 10,614,020 | IN | 0x2D407dDb...d45C | 0 ETH | |
| 0x58091cf0...2cf1c2 | 10,613,474 | IN | 0x2D407dDb...d45C | 0 ETH |