Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
8,734.630805 uUSDC
Holders
12 (0.00%)
Market
Price
$1.09 @ 0.000348 ETH (+0.07%)
Onchain Market Cap
$9,494.54
Circulating Supply Market Cap
$0.00
Other Info
Token Contract (WITH 6 Decimals)
Balance
0 uUSDCValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
Vault
Compiler Version
v0.6.11+commit.5ef660b1
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion, Audited
Contract Source Code (Solidity Standard Json-Input format)Audit Report
// SPDX-License-Identifier: AGPL-3.0-or-later pragma solidity 0.6.11; import "@openzeppelin/contracts/math/SafeMath.sol"; import "@openzeppelin/contracts/utils/ReentrancyGuard.sol"; import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "./protocol/IStrategy.sol"; import "./protocol/IVault.sol"; import "./protocol/IController.sol"; contract Vault is IVault, ERC20, ReentrancyGuard { using SafeERC20 for IERC20; using SafeMath for uint; event SetStrategy(address strategy); event ApproveStrategy(address strategy); event RevokeStrategy(address strategy); event SetWhitelist(address addr, bool approved); address public override admin; address public override controller; address public override timeLock; address public immutable override token; address public override strategy; // mapping of approved strategies mapping(address => bool) public override strategies; // percentange of token reserved in vault for cheap withdraw uint public override reserveMin = 500; uint private constant RESERVE_MAX = 10000; // Denominator used to calculate fees uint private constant FEE_MAX = 10000; uint public override withdrawFee; uint private constant WITHDRAW_FEE_CAP = 500; // upper limit to withdrawFee bool public override paused; // whitelisted addresses // used to prevent flash loah attacks mapping(address => bool) public override whitelist; /* @dev vault decimals must be equal to token decimals */ constructor( address _controller, address _timeLock, address _token ) public ERC20( string(abi.encodePacked("unagii_", ERC20(_token).name())), string(abi.encodePacked("u", ERC20(_token).symbol())) ) { require(_controller != address(0), "controller = zero address"); require(_timeLock != address(0), "time lock = zero address"); _setupDecimals(ERC20(_token).decimals()); admin = msg.sender; controller = _controller; token = _token; timeLock = _timeLock; } modifier onlyAdmin() { require(msg.sender == admin, "!admin"); _; } modifier onlyTimeLock() { require(msg.sender == timeLock, "!time lock"); _; } modifier onlyAdminOrController() { require(msg.sender == admin || msg.sender == controller, "!authorized"); _; } modifier whenStrategyDefined() { require(strategy != address(0), "strategy = zero address"); _; } modifier whenNotPaused() { require(!paused, "paused"); _; } /* @dev modifier to prevent flash loan @dev caller is restricted to EOA or whitelisted contract @dev Warning: Users can have their funds stuck if shares is transferred to a contract */ modifier guard() { require((msg.sender == tx.origin) || whitelist[msg.sender], "!whitelist"); _; } function setAdmin(address _admin) external override onlyAdmin { require(_admin != address(0), "admin = zero address"); admin = _admin; } function setController(address _controller) external override onlyAdmin { require(_controller != address(0), "controller = zero address"); controller = _controller; } function setTimeLock(address _timeLock) external override onlyTimeLock { require(_timeLock != address(0), "time lock = zero address"); timeLock = _timeLock; } function setPause(bool _paused) external override onlyAdmin { paused = _paused; } function setWhitelist(address _addr, bool _approve) external override onlyAdmin { whitelist[_addr] = _approve; emit SetWhitelist(_addr, _approve); } function setReserveMin(uint _reserveMin) external override onlyAdmin { require(_reserveMin <= RESERVE_MAX, "reserve min > max"); reserveMin = _reserveMin; } function setWithdrawFee(uint _fee) external override onlyAdmin { require(_fee <= WITHDRAW_FEE_CAP, "withdraw fee > cap"); withdrawFee = _fee; } function _balanceInVault() private view returns (uint) { return IERC20(token).balanceOf(address(this)); } /* @notice Returns balance of tokens in vault @return Amount of token in vault */ function balanceInVault() external view override returns (uint) { return _balanceInVault(); } function _balanceInStrategy() private view returns (uint) { if (strategy == address(0)) { return 0; } return IStrategy(strategy).totalAssets(); } /* @notice Returns the estimate amount of token in strategy @dev Output may vary depending on price of liquidity provider token where the underlying token is invested */ function balanceInStrategy() external view override returns (uint) { return _balanceInStrategy(); } function _totalDebtInStrategy() private view returns (uint) { if (strategy == address(0)) { return 0; } return IStrategy(strategy).totalDebt(); } /* @notice Returns amount of tokens invested strategy */ function totalDebtInStrategy() external view override returns (uint) { return _totalDebtInStrategy(); } function _totalAssets() private view returns (uint) { return _balanceInVault().add(_totalDebtInStrategy()); } /* @notice Returns the total amount of tokens in vault + total debt @return Total amount of tokens in vault + total debt */ function totalAssets() external view override returns (uint) { return _totalAssets(); } function _minReserve() private view returns (uint) { return _totalAssets().mul(reserveMin) / RESERVE_MAX; } /* @notice Returns minimum amount of tokens that should be kept in vault for cheap withdraw @return Reserve amount */ function minReserve() external view override returns (uint) { return _minReserve(); } function _availableToInvest() private view returns (uint) { if (strategy == address(0)) { return 0; } uint balInVault = _balanceInVault(); uint reserve = _minReserve(); if (balInVault <= reserve) { return 0; } return balInVault - reserve; } /* @notice Returns amount of token available to be invested into strategy @return Amount of token available to be invested into strategy */ function availableToInvest() external view override returns (uint) { return _availableToInvest(); } /* @notice Approve strategy @param _strategy Address of strategy to revoke */ function approveStrategy(address _strategy) external override onlyTimeLock { require(_strategy != address(0), "strategy = zero address"); strategies[_strategy] = true; emit ApproveStrategy(_strategy); } /* @notice Revoke strategy @param _strategy Address of strategy to revoke */ function revokeStrategy(address _strategy) external override onlyAdmin { require(_strategy != address(0), "strategy = zero address"); strategies[_strategy] = false; emit RevokeStrategy(_strategy); } /* @notice Set strategy to approved strategy @param _strategy Address of strategy used @param _min Minimum undelying token current strategy must return. Prevents slippage */ function setStrategy(address _strategy, uint _min) external override onlyAdminOrController { require(strategies[_strategy], "!approved"); require(_strategy != strategy, "new strategy = current strategy"); require( IStrategy(_strategy).underlying() == token, "strategy.token != vault.token" ); require( IStrategy(_strategy).vault() == address(this), "strategy.vault != vault" ); // withdraw from current strategy if (strategy != address(0)) { IERC20(token).safeApprove(strategy, 0); uint balBefore = _balanceInVault(); IStrategy(strategy).exit(); uint balAfter = _balanceInVault(); require(balAfter.sub(balBefore) >= _min, "withdraw < min"); } strategy = _strategy; emit SetStrategy(strategy); } /* @notice Invest token from vault into strategy. Some token are kept in vault for cheap withdraw. */ function invest() external override whenStrategyDefined whenNotPaused onlyAdminOrController { uint amount = _availableToInvest(); require(amount > 0, "available = 0"); IERC20(token).safeApprove(strategy, 0); IERC20(token).safeApprove(strategy, amount); IStrategy(strategy).deposit(amount); IERC20(token).safeApprove(strategy, 0); } /* @notice Deposit token into vault @param _amount Amount of token to transfer from `msg.sender` */ function deposit(uint _amount) external override whenNotPaused nonReentrant guard { require(_amount > 0, "amount = 0"); uint totalUnderlying = _totalAssets(); uint totalShares = totalSupply(); /* s = shares to mint T = total shares before mint d = deposit amount A = total assets in vault + strategy before deposit s / (T + s) = d / (A + d) s = d / A * T */ uint shares; if (totalShares == 0) { shares = _amount; } else { shares = _amount.mul(totalShares).div(totalUnderlying); } _mint(msg.sender, shares); IERC20(token).safeTransferFrom(msg.sender, address(this), _amount); } function _getExpectedReturn( uint _shares, uint _balInVault, uint _balInStrat ) private view returns (uint) { /* s = shares T = total supply of shares w = amount of underlying token to withdraw U = total amount of redeemable underlying token in vault + strategy s / T = w / U w = s / T * U */ /* total underlying = bal in vault + min(total debt, bal in strat) if bal in strat > total debt, redeemable = total debt else redeemable = bal in strat */ uint totalDebt = _totalDebtInStrategy(); uint totalUnderlying; if (_balInStrat > totalDebt) { totalUnderlying = _balInVault.add(totalDebt); } else { totalUnderlying = _balInVault.add(_balInStrat); } uint totalShares = totalSupply(); if (totalShares > 0) { return _shares.mul(totalUnderlying) / totalShares; } return 0; } /* @notice Calculate amount of underlying token that can be withdrawn @param _shares Amount of shares @return Amount of underlying token that can be withdrawn */ function getExpectedReturn(uint _shares) external view override returns (uint) { uint balInVault = _balanceInVault(); uint balInStrat = _balanceInStrategy(); return _getExpectedReturn(_shares, balInVault, balInStrat); } /* @notice Withdraw underlying token @param _shares Amount of shares to burn @param _min Minimum amount of underlying token to return @dev Keep `guard` modifier, else attacker can deposit and then use smart contract to attack from withdraw */ function withdraw(uint _shares, uint _min) external override nonReentrant guard { require(_shares > 0, "shares = 0"); uint balInVault = _balanceInVault(); uint balInStrat = _balanceInStrategy(); uint withdrawAmount = _getExpectedReturn(_shares, balInVault, balInStrat); // Must burn after calculating withdraw amount _burn(msg.sender, _shares); if (balInVault < withdrawAmount) { // maximize withdraw amount from strategy uint amountFromStrat = withdrawAmount; if (balInStrat < withdrawAmount) { amountFromStrat = balInStrat; } IStrategy(strategy).withdraw(amountFromStrat); uint balAfter = _balanceInVault(); uint diff = balAfter.sub(balInVault); if (diff < amountFromStrat) { // withdraw amount - withdraw amount from strat = amount to withdraw from vault // diff = actual amount returned from strategy // NOTE: withdrawAmount >= amountFromStrat withdrawAmount = (withdrawAmount - amountFromStrat).add(diff); } // transfer to treasury uint fee = withdrawAmount.mul(withdrawFee) / FEE_MAX; if (fee > 0) { address treasury = IController(controller).treasury(); require(treasury != address(0), "treasury = zero address"); withdrawAmount = withdrawAmount - fee; IERC20(token).safeTransfer(treasury, fee); } } require(withdrawAmount >= _min, "withdraw < min"); IERC20(token).safeTransfer(msg.sender, withdrawAmount); } /* @notice Transfer token != underlying token in vault to admin @param _token Address of token to transfer @dev Must transfer token to admin @dev _token must not be equal to underlying token @dev Used to transfer token that was accidentally sent to this vault */ function sweep(address _token) external override onlyAdmin { require(_token != token, "token = vault.token"); IERC20(_token).safeTransfer(admin, IERC20(_token).balanceOf(address(this))); } }
// SPDX-License-Identifier: AGPL-3.0-or-later pragma solidity 0.6.11; interface IController { function ADMIN_ROLE() external view returns (bytes32); function HARVESTER_ROLE() external view returns (bytes32); function admin() external view returns (address); function treasury() external view returns (address); function setAdmin(address _admin) external; function setTreasury(address _treasury) external; function grantRole(bytes32 _role, address _addr) external; function revokeRole(bytes32 _role, address _addr) external; /* @notice Set strategy for vault @param _vault Address of vault @param _strategy Address of strategy @param _min Minimum undelying token current strategy must return. Prevents slippage */ function setStrategy( address _vault, address _strategy, uint _min ) external; // calls to strategy /* @notice Invest token in vault into strategy @param _vault Address of vault */ function invest(address _vault) external; function harvest(address _strategy) external; function skim(address _strategy) external; /* @notice Withdraw from strategy to vault @param _strategy Address of strategy @param _amount Amount of underlying token to withdraw @param _min Minimum amount of underlying token to withdraw */ function withdraw( address _strategy, uint _amount, uint _min ) external; /* @notice Withdraw all from strategy to vault @param _strategy Address of strategy @param _min Minimum amount of underlying token to withdraw */ function withdrawAll(address _strategy, uint _min) external; /* @notice Exit from strategy @param _strategy Address of strategy @param _min Minimum amount of underlying token to withdraw */ function exit(address _strategy, uint _min) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () internal { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; import "./IERC20.sol"; import "../../math/SafeMath.sol"; import "../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ 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)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length 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)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "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"); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; import "../../GSN/Context.sol"; import "./IERC20.sol"; import "../../math/SafeMath.sol"; import "../../utils/Address.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { 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); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } }
// SPDX-License-Identifier: AGPL-3.0-or-later pragma solidity 0.6.11; interface IStrategy { function admin() external view returns (address); function controller() external view returns (address); function vault() external view returns (address); /* @notice Returns address of underlying token */ function underlying() external view returns (address); /* @notice Returns total amount of underlying transferred from vault */ function totalDebt() external view returns (uint); function performanceFee() external view returns (uint); /* @notice Returns true if token cannot be swept */ function assets(address _token) external view returns (bool); function setAdmin(address _admin) external; function setController(address _controller) external; function setPerformanceFee(uint _fee) external; /* @notice Returns amount of underlying stable coin locked in this contract @dev Output may vary depending on price of liquidity provider token where the underlying token is invested */ function totalAssets() external view returns (uint); /* @notice Deposit `amount` underlying token for yield token @param amount Amount of underlying token to deposit */ function deposit(uint _amount) external; /* @notice Withdraw `amount` yield token to withdraw @param amount Amount of yield token to withdraw */ function withdraw(uint _amount) external; /* @notice Withdraw all underlying token from strategy */ function withdrawAll() external; function harvest() external; /* @notice Exit from strategy @dev Must transfer all underlying tokens back to vault */ function exit() external; /* @notice Transfer profit over total debt to vault */ function skim() external; /* @notice Transfer token in strategy to admin @param _token Address of token to transfer @dev Must transfer token to admin @dev _token must not be equal to underlying token @dev Used to transfer token that was accidentally sent or claim dust created from this strategy */ function sweep(address _token) external; }
// SPDX-License-Identifier: AGPL-3.0-or-later pragma solidity 0.6.11; interface IVault { function admin() external view returns (address); function controller() external view returns (address); function timeLock() external view returns (address); function token() external view returns (address); function strategy() external view returns (address); function strategies(address _strategy) external view returns (bool); function reserveMin() external view returns (uint); function withdrawFee() external view returns (uint); function paused() external view returns (bool); function whitelist(address _addr) external view returns (bool); function setWhitelist(address _addr, bool _approve) external; function setAdmin(address _admin) external; function setController(address _controller) external; function setTimeLock(address _timeLock) external; function setPause(bool _paused) external; function setReserveMin(uint _reserveMin) external; function setWithdrawFee(uint _fee) external; /* @notice Returns the amount of token in the vault */ function balanceInVault() external view returns (uint); /* @notice Returns the estimate amount of token in strategy @dev Output may vary depending on price of liquidity provider token where the underlying token is invested */ function balanceInStrategy() external view returns (uint); /* @notice Returns amount of tokens invested strategy */ function totalDebtInStrategy() external view returns (uint); /* @notice Returns the total amount of token in vault + total debt */ function totalAssets() external view returns (uint); /* @notice Returns minimum amount of tokens that should be kept in vault for cheap withdraw @return Reserve amount */ function minReserve() external view returns (uint); /* @notice Returns the amount of tokens available to be invested */ function availableToInvest() external view returns (uint); /* @notice Approve strategy @param _strategy Address of strategy */ function approveStrategy(address _strategy) external; /* @notice Revoke strategy @param _strategy Address of strategy */ function revokeStrategy(address _strategy) external; /* @notice Set strategy @param _min Minimum undelying token current strategy must return. Prevents slippage */ function setStrategy(address _strategy, uint _min) external; /* @notice Transfers token in vault to strategy */ function invest() external; /* @notice Deposit undelying token into this vault @param _amount Amount of token to deposit */ function deposit(uint _amount) external; /* @notice Calculate amount of token that can be withdrawn @param _shares Amount of shares @return Amount of token that can be withdrawn */ function getExpectedReturn(uint _shares) external view returns (uint); /* @notice Withdraw token @param _shares Amount of shares to burn @param _min Minimum amount of token expected to return */ function withdraw(uint _shares, uint _min) external; /* @notice Transfer token in vault to admin @param _token Address of token to transfer @dev _token must not be equal to vault token */ function sweep(address _token) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.2; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "libraries": {} }
Contract Security Audit
- Certik - December 23rd, 2020 - Security Audit Report
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:"_admin","type":"address"}],"name":"setAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_controller","type":"address"}],"name":"setController","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_paused","type":"bool"}],"name":"setPause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_reserveMin","type":"uint256"}],"name":"setReserveMin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_strategy","type":"address"},{"internalType":"uint256","name":"_min","type":"uint256"}],"name":"setStrategy","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_timeLock","type":"address"}],"name":"setTimeLock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_addr","type":"address"},{"internalType":"bool","name":"_approve","type":"bool"}],"name":"setWhitelist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_fee","type":"uint256"}],"name":"setWithdrawFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"strategies","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"strategy","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"sweep","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"timeLock","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAssets","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalDebtInStrategy","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"whitelist","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_shares","type":"uint256"},{"internalType":"uint256","name":"_min","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000013195fa27de3fc1b5adcfb9b005989157600efcc00000000000000000000000086d10751b18f3fe331c146546868a07224a8598b000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
-----Decoded View---------------
Arg [0] : _controller (address): 0x13195FA27De3FC1b5AdcFB9b005989157600EFCC
Arg [1] : _timeLock (address): 0x86d10751B18F3fE331C146546868a07224A8598B
Arg [2] : _token (address): 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000013195fa27de3fc1b5adcfb9b005989157600efcc
Arg [1] : 00000000000000000000000086d10751b18f3fe331c146546868a07224a8598b
Arg [2] : 000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
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