Address Contract Partially Verified
Address
0x29E240CFD7946BA20895a7a02eDb25C210f9f324
Balance
0 ETH
Nonce
1
Code Size
17787 bytes
Creator
0x2D407dDb...d45C at tx 0xdfff5f22...07cb7c
Indexed Transactions
0
Contract Bytecode
17787 bytes
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Verified Source Code Partial Match
Compiler: v0.5.17+commit.d19bba13
EVM: istanbul
Optimization: No
yDelegatedVault.sol 595 lines
/**
*Submitted for verification at Etherscan.io on 2020-08-04
*/
pragma solidity ^0.5.16;
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 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);
}
contract Context {
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
_owner = _msgSender();
emit OwnershipTransferred(address(0), _owner);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
function isOwner() public view returns (bool) {
return _msgSender() == _owner;
}
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
}
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 safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
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 withdraw(address, uint) external;
function balanceOf(address) external view returns (uint);
function earn(address, uint) external;
function want(address) external view returns (address);
}
interface Aave {
function borrow(address _reserve, uint _amount, uint _interestRateModel, uint16 _referralCode) external;
function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external;
function repay(address _reserve, uint _amount, address payable _onBehalfOf) external payable;
function getUserAccountData(address _user)
external
view
returns (
uint totalLiquidityETH,
uint totalCollateralETH,
uint totalBorrowsETH,
uint totalFeesETH,
uint availableBorrowsETH,
uint currentLiquidationThreshold,
uint ltv,
uint healthFactor
);
function getUserReserveData(address _reserve, address _user)
external
view
returns (
uint currentATokenBalance,
uint currentBorrowBalance,
uint principalBorrowBalance,
uint borrowRateMode,
uint borrowRate,
uint liquidityRate,
uint originationFee,
uint variableBorrowIndex,
uint lastUpdateTimestamp,
bool usageAsCollateralEnabled
);
}
interface AaveToken {
function underlyingAssetAddress() external view returns (address);
}
interface Oracle {
function getAssetPrice(address reserve) external view returns (uint);
function latestAnswer() external view returns (uint);
}
interface LendingPoolAddressesProvider {
function getLendingPool() external view returns (address);
function getLendingPoolCore() external view returns (address);
function getPriceOracle() external view returns (address);
}
contract yDelegatedVault is ERC20, ERC20Detailed {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
IERC20 public token;
address public governance;
address public controller;
uint public insurance;
uint public healthFactor = 4;
uint public ltv = 65;
uint public max = 100;
address public constant aave = address(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8);
constructor (address _token, address _controller) public ERC20Detailed(
string(abi.encodePacked("yearn ", ERC20Detailed(_token).name())),
string(abi.encodePacked("y", ERC20Detailed(_token).symbol())),
ERC20Detailed(_token).decimals()
) {
token = IERC20(_token);
governance = msg.sender;
controller = _controller;
}
function debt() public view returns (uint) {
address _reserve = Controller(controller).want(address(this));
(,uint currentBorrowBalance,,,,,,,,) = Aave(getAave()).getUserReserveData(_reserve, address(this));
return currentBorrowBalance;
}
function credit() public view returns (uint) {
return Controller(controller).balanceOf(address(this));
}
// % of tokens locked and cannot be withdrawn per user
// this is impermanent locked, unless the debt out accrues the strategy
function locked() public view returns (uint) {
return credit().mul(1e18).div(debt());
}
function debtShare(address _lp) public view returns (uint) {
return debt().mul(balanceOf(_lp)).mul(totalSupply());
}
function getAave() public view returns (address) {
return LendingPoolAddressesProvider(aave).getLendingPool();
}
function getAaveCore() public view returns (address) {
return LendingPoolAddressesProvider(aave).getLendingPoolCore();
}
function setHealthFactor(uint _hf) external {
require(msg.sender == governance, "!governance");
healthFactor = _hf;
}
function activate() public {
Aave(getAave()).setUserUseReserveAsCollateral(underlying(), true);
}
function repay(address reserve, uint amount) public {
// Required for certain stable coins (USDT for example)
IERC20(reserve).approve(address(getAaveCore()), 0);
IERC20(reserve).approve(address(getAaveCore()), amount);
Aave(getAave()).repay(reserve, amount, address(uint160(address(this))));
}
function repayAll() public {
address _reserve = reserve();
uint _amount = IERC20(_reserve).balanceOf(address(this));
repay(_reserve, _amount);
}
// Used to swap any borrowed reserve over the debt limit to liquidate to 'token'
function harvest(address reserve, uint amount) external {
require(msg.sender == controller, "!controller");
require(reserve != address(token), "token");
IERC20(reserve).safeTransfer(controller, amount);
}
// Ignore insurance fund for balance calculations
function balance() public view returns (uint) {
return token.balanceOf(address(this)).sub(insurance);
}
function setController(address _controller) external {
require(msg.sender == governance, "!governance");
controller = _controller;
}
function getAaveOracle() public view returns (address) {
return LendingPoolAddressesProvider(aave).getPriceOracle();
}
function getReservePriceETH(address reserve) public view returns (uint) {
return Oracle(getAaveOracle()).getAssetPrice(reserve);
}
function shouldRebalance() external view returns (bool) {
return (over() > 0);
}
function over() public view returns (uint) {
over(0);
}
function getUnderlyingPriceETH(uint _amount) public view returns (uint) {
_amount = _amount.mul(getUnderlyingPrice()).div(uint(10)**ERC20Detailed(address(token)).decimals()); // Calculate the amount we are withdrawing in ETH
return _amount.mul(ltv).div(max).div(healthFactor);
}
function over(uint _amount) public view returns (uint) {
address _reserve = reserve();
uint _eth = getUnderlyingPriceETH(_amount);
(uint _maxSafeETH,uint _totalBorrowsETH,) = maxSafeETH();
_maxSafeETH = _maxSafeETH.mul(105).div(100); // 5% buffer so we don't go into a earn/rebalance loop
if (_eth > _maxSafeETH) {
_maxSafeETH = 0;
} else {
_maxSafeETH = _maxSafeETH.sub(_eth); // Add the ETH we are withdrawing
}
if (_maxSafeETH < _totalBorrowsETH) {
uint _over = _totalBorrowsETH.mul(_totalBorrowsETH.sub(_maxSafeETH)).div(_totalBorrowsETH);
_over = _over.mul(uint(10)**ERC20Detailed(_reserve).decimals()).div(getReservePrice());
return _over;
} else {
return 0;
}
}
function _rebalance(uint _amount) internal {
uint _over = over(_amount);
if (_over > 0) {
if (_over > credit()) {
_over = credit();
}
if (_over > 0) {
Controller(controller).withdraw(address(this), _over);
repayAll();
}
}
}
function rebalance() external {
_rebalance(0);
}
function claimInsurance() external {
require(msg.sender == controller, "!controller");
token.safeTransfer(controller, insurance);
insurance = 0;
}
function maxSafeETH() public view returns (uint maxBorrowsETH, uint totalBorrowsETH, uint availableBorrowsETH) {
(,,uint _totalBorrowsETH,,uint _availableBorrowsETH,,,) = Aave(getAave()).getUserAccountData(address(this));
uint _maxBorrowETH = (_totalBorrowsETH.add(_availableBorrowsETH));
return (_maxBorrowETH.div(healthFactor), _totalBorrowsETH, _availableBorrowsETH);
}
function shouldBorrow() external view returns (bool) {
return (availableToBorrowReserve() > 0);
}
function availableToBorrowETH() public view returns (uint) {
(uint _maxSafeETH,uint _totalBorrowsETH, uint _availableBorrowsETH) = maxSafeETH();
_maxSafeETH = _maxSafeETH.mul(95).div(100); // 5% buffer so we don't go into a earn/rebalance loop
if (_maxSafeETH > _totalBorrowsETH) {
return _availableBorrowsETH.mul(_maxSafeETH.sub(_totalBorrowsETH)).div(_availableBorrowsETH);
} else {
return 0;
}
}
function availableToBorrowReserve() public view returns (uint) {
address _reserve = reserve();
uint _available = availableToBorrowETH();
if (_available > 0) {
return _available.mul(uint(10)**ERC20Detailed(_reserve).decimals()).div(getReservePrice());
} else {
return 0;
}
}
function getReservePrice() public view returns (uint) {
return getReservePriceETH(reserve());
}
function getUnderlyingPrice() public view returns (uint) {
return getReservePriceETH(underlying());
}
function earn() external {
address _reserve = reserve();
uint _borrow = availableToBorrowReserve();
if (_borrow > 0) {
Aave(getAave()).borrow(_reserve, _borrow, 2, 7);
}
//rebalance here
uint _balance = IERC20(_reserve).balanceOf(address(this));
if (_balance > 0) {
IERC20(_reserve).safeTransfer(controller, _balance);
Controller(controller).earn(address(this), _balance);
}
}
function depositAll() external {
deposit(token.balanceOf(msg.sender));
}
function deposit(uint _amount) public {
uint _pool = balance();
token.safeTransferFrom(msg.sender, address(this), _amount);
// 0.5% of deposits go into an insurance fund incase of negative profits to protect withdrawals
// At a 4 health factor, this is a -2% position
uint _insurance = _amount.mul(50).div(10000);
_amount = _amount.sub(_insurance);
insurance = insurance.add(_insurance);
//Controller can claim insurance to liquidate to cover interest
uint shares = 0;
if (totalSupply() == 0) {
shares = _amount;
} else {
shares = (_amount.mul(totalSupply())).div(_pool);
}
_mint(msg.sender, shares);
}
function reserve() public view returns (address) {
return Controller(controller).want(address(this));
}
function underlying() public view returns (address) {
return AaveToken(address(token)).underlyingAssetAddress();
}
function withdrawAll() public {
withdraw(balanceOf(msg.sender));
}
// Calculates in impermanent lock due to debt
function maxWithdrawal(address account) public view returns (uint) {
uint _balance = balanceOf(account);
uint _safeWithdraw = _balance.mul(locked()).div(1e18);
if (_safeWithdraw > _balance) {
return _balance;
} else {
uint _diff = _balance.sub(_safeWithdraw);
return _balance.sub(_diff.mul(healthFactor)); // technically 150%, not 200%, but adding buffer
}
}
function safeWithdraw() external {
withdraw(maxWithdrawal(msg.sender));
}
// No rebalance implementation for lower fees and faster swaps
function withdraw(uint _shares) public {
uint r = (balance().mul(_shares)).div(totalSupply());
_burn(msg.sender, _shares);
_rebalance(r);
token.safeTransfer(msg.sender, r);
}
function getPricePerFullShare() external view returns (uint) {
return balance().mul(1e18).div(totalSupply());
}
}
Read Contract
aave 0x819faf7b → address
allowance 0xdd62ed3e → uint256
availableToBorrowETH 0xb040785a → uint256
availableToBorrowReserve 0x929c8849 → uint256
balance 0xb69ef8a8 → uint256
balanceOf 0x70a08231 → uint256
controller 0xf77c4791 → address
credit 0xa06d083c → uint256
debt 0x0dca59c1 → uint256
debtShare 0x2851e2e0 → uint256
decimals 0x313ce567 → uint8
getAave 0xf7c1ec77 → address
getAaveCore 0xf82ce27d → address
getAaveOracle 0x9f287e16 → address
getPricePerFullShare 0x77c7b8fc → uint256
getReservePrice 0xf0722322 → uint256
getReservePriceETH 0x11dddca4 → uint256
getUnderlyingPrice 0x468f02d2 → uint256
getUnderlyingPriceETH 0xdd90a791 → uint256
governance 0x5aa6e675 → address
healthFactor 0x22841f01 → uint256
insurance 0x89cf3204 → uint256
locked 0xcf309012 → uint256
ltv 0x6fb49d73 → uint256
max 0x6ac5db19 → uint256
maxSafeETH 0x62f5548d → uint256, uint256, uint256
maxWithdrawal 0x27afd028 → uint256
name 0x06fdde03 → string
over 0x6ad4e251 → uint256
over 0x7eaef50c → uint256
reserve 0xcd3293de → address
shouldBorrow 0x1b93e5b0 → bool
shouldRebalance 0xae2c1d5f → bool
symbol 0x95d89b41 → string
token 0xfc0c546a → address
totalSupply 0x18160ddd → uint256
underlying 0x6f307dc3 → address
Write Contract 19 functions
These functions modify contract state and require a wallet transaction to execute.
activate 0x0f15f4c0
No parameters
approve 0x095ea7b3
address spender
uint256 amount
returns: bool
claimInsurance 0xa75ac608
No parameters
decreaseAllowance 0xa457c2d7
address spender
uint256 subtractedValue
returns: bool
deposit 0xb6b55f25
uint256 _amount
depositAll 0xde5f6268
No parameters
earn 0xd389800f
No parameters
harvest 0x018ee9b7
address reserve
uint256 amount
increaseAllowance 0x39509351
address spender
uint256 addedValue
returns: bool
rebalance 0x7d7c2a1c
No parameters
repay 0x22867d78
address reserve
uint256 amount
repayAll 0xfa3ae6dc
No parameters
safeWithdraw 0x7fd42617
No parameters
setController 0x92eefe9b
address _controller
setHealthFactor 0x31111708
uint256 _hf
transfer 0xa9059cbb
address recipient
uint256 amount
returns: bool
transferFrom 0x23b872dd
address sender
address recipient
uint256 amount
returns: bool
withdraw 0x2e1a7d4d
uint256 _shares
withdrawAll 0x853828b6
No parameters
Token Balances (2)
View Transfers →Recent Transactions
No transactions found for this address