Source Code
Latest 25 from a total of 56 transactions
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| Harvest | 13065774 | 1609 days ago | IN | 0 ETH | 0.03114181 | ||||
| Harvest | 13061323 | 1609 days ago | IN | 0 ETH | 0.03870473 | ||||
| Harvest | 13040881 | 1612 days ago | IN | 0 ETH | 0.04406096 | ||||
| Harvest | 13009814 | 1617 days ago | IN | 0 ETH | 0.04211328 | ||||
| Harvest | 12982225 | 1621 days ago | IN | 0 ETH | 0.04709691 | ||||
| Harvest | 12958360 | 1625 days ago | IN | 0 ETH | 0.03710296 | ||||
| Harvest | 12930194 | 1630 days ago | IN | 0 ETH | 0.03181741 | ||||
| Harvest | 12893092 | 1635 days ago | IN | 0 ETH | 0.01875241 | ||||
| Harvest | 12868445 | 1639 days ago | IN | 0 ETH | 0.03050518 | ||||
| Harvest | 12841338 | 1644 days ago | IN | 0 ETH | 0.03652148 | ||||
| Harvest | 12808259 | 1649 days ago | IN | 0 ETH | 0.01694732 | ||||
| Harvest | 12789782 | 1652 days ago | IN | 0 ETH | 0.02868008 | ||||
| Harvest | 12757067 | 1657 days ago | IN | 0 ETH | 0.00902328 | ||||
| Harvest | 12746361 | 1658 days ago | IN | 0 ETH | 0.0150057 | ||||
| Harvest | 12732474 | 1661 days ago | IN | 0 ETH | 0.01750665 | ||||
| Harvest | 12714320 | 1663 days ago | IN | 0 ETH | 0.01125428 | ||||
| Harvest | 12702771 | 1665 days ago | IN | 0 ETH | 0.01499732 | ||||
| Harvest | 12688349 | 1667 days ago | IN | 0 ETH | 0.01625618 | ||||
| Harvest | 12668118 | 1671 days ago | IN | 0 ETH | 0.01048207 | ||||
| Harvest | 12650673 | 1673 days ago | IN | 0 ETH | 0.01547687 | ||||
| Harvest | 12635606 | 1676 days ago | IN | 0 ETH | 0.01376752 | ||||
| Harvest | 12619944 | 1678 days ago | IN | 0 ETH | 0.0127477 | ||||
| Harvest | 12603872 | 1681 days ago | IN | 0 ETH | 0.01529724 | ||||
| Harvest | 12591787 | 1682 days ago | IN | 0 ETH | 0.02240699 | ||||
| Harvest | 12564092 | 1687 days ago | IN | 0 ETH | 0.02170024 |
Latest 25 internal transactions (View All)
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| Parent Transaction Hash | Method | Block |
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| - | 13065774 | 1609 days ago | 0.42594363 ETH | ||||
| - | 13065774 | 1609 days ago | 0.42594363 ETH | ||||
| - | 13065774 | 1609 days ago | 0.85188727 ETH | ||||
| - | 13061323 | 1609 days ago | 2.17192523 ETH | ||||
| - | 13061323 | 1609 days ago | 2.17192523 ETH | ||||
| - | 13061323 | 1609 days ago | 4.34385046 ETH | ||||
| - | 13040881 | 1612 days ago | 1.97351647 ETH | ||||
| - | 13040881 | 1612 days ago | 1.97351647 ETH | ||||
| - | 13040881 | 1612 days ago | 3.94703295 ETH | ||||
| - | 13009814 | 1617 days ago | 2.1015768 ETH | ||||
| - | 13009814 | 1617 days ago | 2.1015768 ETH | ||||
| - | 13009814 | 1617 days ago | 4.2031536 ETH | ||||
| - | 12982225 | 1621 days ago | 2.3508764 ETH | ||||
| - | 12982225 | 1621 days ago | 2.3508764 ETH | ||||
| - | 12982225 | 1621 days ago | 4.70175281 ETH | ||||
| - | 12958360 | 1625 days ago | 2.15788973 ETH | ||||
| - | 12958360 | 1625 days ago | 2.15788973 ETH | ||||
| - | 12958360 | 1625 days ago | 4.31577947 ETH | ||||
| - | 12930194 | 1630 days ago | 2.00691822 ETH | ||||
| - | 12930194 | 1630 days ago | 2.00691822 ETH | ||||
| - | 12930194 | 1630 days ago | 4.01383644 ETH | ||||
| - | 12893092 | 1635 days ago | 1.12185632 ETH | ||||
| - | 12893092 | 1635 days ago | 1.12185632 ETH | ||||
| - | 12893092 | 1635 days ago | 2.24371264 ETH | ||||
| - | 12868445 | 1639 days ago | 1.21725837 ETH |
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This contract may be a proxy contract. Click on More Options and select Is this a proxy? to confirm and enable the "Read as Proxy" & "Write as Proxy" tabs.
Contract Name:
StrategyCurveSteCRV
Compiler Version
v0.6.7+commit.b8d736ae
Optimization Enabled:
Yes with 9999 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/**
*Submitted for verification at Etherscan.io on 2021-01-27
*/
// hevm: flattened sources of src/strategies/curve/strategy-curve-stecrv.sol
pragma solidity >=0.6.0 <0.7.0 >=0.6.2 <0.7.0 >=0.6.7 <0.7.0;
////// src/interfaces/controller.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.0; */
interface IController {
function jars(address) external view returns (address);
function rewards() external view returns (address);
function devfund() external view returns (address);
function treasury() external view returns (address);
function balanceOf(address) external view returns (uint256);
function withdraw(address, uint256) external;
function earn(address, uint256) external;
}
////// src/interfaces/curve.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.7; */
interface ICurveFi_2 {
function get_virtual_price() external view returns (uint256);
function add_liquidity(uint256[2] calldata amounts, uint256 min_mint_amount)
external;
function remove_liquidity_imbalance(
uint256[2] calldata amounts,
uint256 max_burn_amount
) external;
function remove_liquidity(uint256 _amount, uint256[2] calldata amounts)
external;
function exchange(
int128 from,
int128 to,
uint256 _from_amount,
uint256 _min_to_amount
) external;
function balances(int128) external view returns (uint256);
}
interface ICurveFi_3 {
function get_virtual_price() external view returns (uint256);
function add_liquidity(uint256[3] calldata amounts, uint256 min_mint_amount)
external;
function remove_liquidity_imbalance(
uint256[3] calldata amounts,
uint256 max_burn_amount
) external;
function remove_liquidity(uint256 _amount, uint256[3] calldata amounts)
external;
function exchange(
int128 from,
int128 to,
uint256 _from_amount,
uint256 _min_to_amount
) external;
function balances(uint256) external view returns (uint256);
}
interface ICurveFi_4 {
function get_virtual_price() external view returns (uint256);
function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount)
external;
// stETH pool
function add_liquidity(
uint256[2] calldata amounts,
uint256 min_mint_amount
) external payable;
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;
function balances(int128) external view returns (uint256);
}
interface ICurveZap_4 {
function add_liquidity(
uint256[4] calldata uamounts,
uint256 min_mint_amount
) external;
function remove_liquidity(uint256 _amount, uint256[4] calldata min_uamounts)
external;
function remove_liquidity_imbalance(
uint256[4] calldata uamounts,
uint256 max_burn_amount
) external;
function calc_withdraw_one_coin(uint256 _token_amount, int128 i)
external
returns (uint256);
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_uamount
) external;
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_uamount,
bool donate_dust
) external;
function withdraw_donated_dust() external;
function coins(int128 arg0) external returns (address);
function underlying_coins(int128 arg0) external returns (address);
function curve() external returns (address);
function token() external returns (address);
}
interface ICurveZap {
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_uamount
) external;
}
interface ICurveGauge {
function deposit(uint256 _value) external;
function deposit(uint256 _value, address addr) external;
function balanceOf(address arg0) external view returns (uint256);
function withdraw(uint256 _value) external;
function withdraw(uint256 _value, bool claim_rewards) external;
function claim_rewards() external;
function claim_rewards(address addr) external;
function claimable_tokens(address addr) external returns (uint256);
function claimable_reward(address addr) external view returns (uint256);
function claimable_reward(address, address) external view returns (uint256);
function integrate_fraction(address arg0) external view returns (uint256);
}
interface ICurveMintr {
function mint(address) external;
function minted(address arg0, address arg1) external view returns (uint256);
}
interface ICurveVotingEscrow {
function locked(address arg0)
external
view
returns (int128 amount, uint256 end);
function locked__end(address _addr) external view returns (uint256);
function create_lock(uint256, uint256) external;
function increase_amount(uint256) external;
function increase_unlock_time(uint256 _unlock_time) external;
function withdraw() external;
function smart_wallet_checker() external returns (address);
}
interface ICurveSmartContractChecker {
function wallets(address) external returns (bool);
function approveWallet(address _wallet) external;
}
////// src/lib/context.sol
// 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;
}
}
////// src/lib/safe-math.sol
// 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;
}
}
////// src/lib/erc20.sol
// File: contracts/GSN/Context.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.0; */
/* import "./safe-math.sol"; */
/* import "./context.sol"; */
// File: contracts/token/ERC20/IERC20.sol
/**
* @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);
}
// File: contracts/utils/Address.sol
/**
* @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 on 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);
}
}
}
}
// File: contracts/token/ERC20/ERC20.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 { }
}
/**
* @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");
}
}
}
////// src/interfaces/jar.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.2; */
/* import "../lib/erc20.sol"; */
interface IJar is IERC20 {
function token() external view returns (address);
function claimInsurance() external; // NOTE: Only yDelegatedVault implements this
function getRatio() external view returns (uint256);
function depositAll() external;
function deposit(uint256) external;
function withdrawAll() external;
function withdraw(uint256) external;
function earn() external;
function decimals() external view returns (uint8);
}
////// src/interfaces/masterchef.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.7; */
interface IMasterchef {
function BONUS_MULTIPLIER() external view returns (uint256);
function add(
uint256 _allocPoint,
address _lpToken,
bool _withUpdate
) external;
function bonusEndBlock() external view returns (uint256);
function deposit(uint256 _pid, uint256 _amount) external;
function dev(address _devaddr) external;
function devFundDivRate() external view returns (uint256);
function devaddr() external view returns (address);
function emergencyWithdraw(uint256 _pid) external;
function getMultiplier(uint256 _from, uint256 _to)
external
view
returns (uint256);
function massUpdatePools() external;
function owner() external view returns (address);
function pendingPickle(uint256 _pid, address _user)
external
view
returns (uint256);
function pickle() external view returns (address);
function picklePerBlock() external view returns (uint256);
function poolInfo(uint256)
external
view
returns (
address lpToken,
uint256 allocPoint,
uint256 lastRewardBlock,
uint256 accPicklePerShare
);
function poolLength() external view returns (uint256);
function renounceOwnership() external;
function set(
uint256 _pid,
uint256 _allocPoint,
bool _withUpdate
) external;
function setBonusEndBlock(uint256 _bonusEndBlock) external;
function setDevFundDivRate(uint256 _devFundDivRate) external;
function setPicklePerBlock(uint256 _picklePerBlock) external;
function startBlock() external view returns (uint256);
function totalAllocPoint() external view returns (uint256);
function transferOwnership(address newOwner) external;
function updatePool(uint256 _pid) external;
function userInfo(uint256, address)
external
view
returns (uint256 amount, uint256 rewardDebt);
function withdraw(uint256 _pid, uint256 _amount) external;
}
////// src/interfaces/staking-rewards.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.2; */
interface IStakingRewards {
function balanceOf(address account) external view returns (uint256);
function earned(address account) external view returns (uint256);
function exit() external;
function getReward() external;
function getRewardForDuration() external view returns (uint256);
function lastTimeRewardApplicable() external view returns (uint256);
function lastUpdateTime() external view returns (uint256);
function notifyRewardAmount(uint256 reward) external;
function periodFinish() external view returns (uint256);
function rewardPerToken() external view returns (uint256);
function rewardPerTokenStored() external view returns (uint256);
function rewardRate() external view returns (uint256);
function rewards(address) external view returns (uint256);
function rewardsDistribution() external view returns (address);
function rewardsDuration() external view returns (uint256);
function rewardsToken() external view returns (address);
function stake(uint256 amount) external;
function stakeWithPermit(
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
function stakingToken() external view returns (address);
function totalSupply() external view returns (uint256);
function userRewardPerTokenPaid(address) external view returns (uint256);
function withdraw(uint256 amount) external;
}
interface IStakingRewardsFactory {
function deploy(address stakingToken, uint256 rewardAmount) external;
function isOwner() external view returns (bool);
function notifyRewardAmount(address stakingToken) external;
function notifyRewardAmounts() external;
function owner() external view returns (address);
function renounceOwnership() external;
function rewardsToken() external view returns (address);
function stakingRewardsGenesis() external view returns (uint256);
function stakingRewardsInfoByStakingToken(address)
external
view
returns (address stakingRewards, uint256 rewardAmount);
function stakingTokens(uint256) external view returns (address);
function transferOwnership(address newOwner) external;
}
////// src/interfaces/steth.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.0; */
/* import "../lib/erc20.sol"; */
interface IStEth is IERC20 {
function submit(address) external payable returns (uint256);
}
////// src/interfaces/uniswapv2.sol
// SPDX-License-Identifier: MIT
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.2; */
interface UniswapRouterV2 {
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
////// src/interfaces/weth.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.0; */
interface WETH {
function name() external view returns (string memory);
function approve(address guy, uint256 wad) external returns (bool);
function totalSupply() external view returns (uint256);
function transferFrom(
address src,
address dst,
uint256 wad
) external returns (bool);
function withdraw(uint256 wad) external;
function decimals() external view returns (uint8);
function balanceOf(address) external view returns (uint256);
function symbol() external view returns (string memory);
function transfer(address dst, uint256 wad) external returns (bool);
function deposit() external payable;
function allowance(address, address) external view returns (uint256);
}
////// src/strategies/strategy-base.sol
/* pragma solidity ^0.6.7; */
/* import "../lib/erc20.sol"; */
/* import "../lib/safe-math.sol"; */
/* import "../interfaces/jar.sol"; */
/* import "../interfaces/staking-rewards.sol"; */
/* import "../interfaces/masterchef.sol"; */
/* import "../interfaces/uniswapv2.sol"; */
/* import "../interfaces/controller.sol"; */
// Strategy Contract Basics
abstract contract StrategyBase {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
// Perfomance fees - start with 20%
uint256 public performanceTreasuryFee = 2000;
uint256 public constant performanceTreasuryMax = 10000;
uint256 public performanceDevFee = 0;
uint256 public constant performanceDevMax = 10000;
// Withdrawal fee 0%
// - 0% to treasury
// - 0% to dev fund
uint256 public withdrawalTreasuryFee = 0;
uint256 public constant withdrawalTreasuryMax = 100000;
uint256 public withdrawalDevFundFee = 0;
uint256 public constant withdrawalDevFundMax = 100000;
// Tokens
address public want;
address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
// User accounts
address public governance;
address public controller;
address public strategist;
address public timelock;
// Dex
address public univ2Router2 = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address public sushiRouter = 0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F;
mapping(address => bool) public harvesters;
constructor(
address _want,
address _governance,
address _strategist,
address _controller,
address _timelock
) public {
require(_want != address(0));
require(_governance != address(0));
require(_strategist != address(0));
require(_controller != address(0));
require(_timelock != address(0));
want = _want;
governance = _governance;
strategist = _strategist;
controller = _controller;
timelock = _timelock;
}
// **** Modifiers **** //
modifier onlyBenevolent {
require(
harvesters[msg.sender] ||
msg.sender == governance ||
msg.sender == strategist
);
_;
}
// **** Views **** //
function balanceOfWant() public view returns (uint256) {
return IERC20(want).balanceOf(address(this));
}
function balanceOfPool() public virtual view returns (uint256);
function balanceOf() public view returns (uint256) {
return balanceOfWant().add(balanceOfPool());
}
function getName() external virtual pure returns (string memory);
// **** Setters **** //
function whitelistHarvester(address _harvester) external {
require(msg.sender == governance ||
msg.sender == strategist, "not authorized");
harvesters[_harvester] = true;
}
function revokeHarvester(address _harvester) external {
require(msg.sender == governance ||
msg.sender == strategist, "not authorized");
harvesters[_harvester] = false;
}
function setWithdrawalDevFundFee(uint256 _withdrawalDevFundFee) external {
require(msg.sender == timelock, "!timelock");
withdrawalDevFundFee = _withdrawalDevFundFee;
}
function setWithdrawalTreasuryFee(uint256 _withdrawalTreasuryFee) external {
require(msg.sender == timelock, "!timelock");
withdrawalTreasuryFee = _withdrawalTreasuryFee;
}
function setPerformanceDevFee(uint256 _performanceDevFee) external {
require(msg.sender == timelock, "!timelock");
performanceDevFee = _performanceDevFee;
}
function setPerformanceTreasuryFee(uint256 _performanceTreasuryFee)
external
{
require(msg.sender == timelock, "!timelock");
performanceTreasuryFee = _performanceTreasuryFee;
}
function setStrategist(address _strategist) external {
require(msg.sender == governance, "!governance");
strategist = _strategist;
}
function setGovernance(address _governance) external {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function setTimelock(address _timelock) external {
require(msg.sender == timelock, "!timelock");
timelock = _timelock;
}
function setController(address _controller) external {
require(msg.sender == timelock, "!timelock");
controller = _controller;
}
// **** State mutations **** //
function deposit() public virtual;
// Controller only function for creating additional rewards from dust
function withdraw(IERC20 _asset) external returns (uint256 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 jar withdrawal
function withdraw(uint256 _amount) external {
require(msg.sender == controller, "!controller");
uint256 _balance = IERC20(want).balanceOf(address(this));
if (_balance < _amount) {
_amount = _withdrawSome(_amount.sub(_balance));
_amount = _amount.add(_balance);
}
uint256 _feeDev = _amount.mul(withdrawalDevFundFee).div(
withdrawalDevFundMax
);
IERC20(want).safeTransfer(IController(controller).devfund(), _feeDev);
uint256 _feeTreasury = _amount.mul(withdrawalTreasuryFee).div(
withdrawalTreasuryMax
);
IERC20(want).safeTransfer(
IController(controller).treasury(),
_feeTreasury
);
address _jar = IController(controller).jars(address(want));
require(_jar != address(0), "!jar"); // additional protection so we don't burn the funds
IERC20(want).safeTransfer(_jar, _amount.sub(_feeDev).sub(_feeTreasury));
}
// Withdraw funds, used to swap between strategies
function withdrawForSwap(uint256 _amount)
external
returns (uint256 balance)
{
require(msg.sender == controller, "!controller");
_withdrawSome(_amount);
balance = IERC20(want).balanceOf(address(this));
address _jar = IController(controller).jars(address(want));
require(_jar != address(0), "!jar");
IERC20(want).safeTransfer(_jar, balance);
}
// Withdraw all funds, normally used when migrating strategies
function withdrawAll() external returns (uint256 balance) {
require(msg.sender == controller, "!controller");
_withdrawAll();
balance = IERC20(want).balanceOf(address(this));
address _jar = IController(controller).jars(address(want));
require(_jar != address(0), "!jar"); // additional protection so we don't burn the funds
IERC20(want).safeTransfer(_jar, balance);
}
function _withdrawAll() internal {
_withdrawSome(balanceOfPool());
}
function _withdrawSome(uint256 _amount) internal virtual returns (uint256);
function harvest() public virtual;
// **** Emergency functions ****
function execute(address _target, bytes memory _data)
public
payable
returns (bytes memory response)
{
require(msg.sender == timelock, "!timelock");
require(_target != address(0), "!target");
// call contract in current context
assembly {
let succeeded := delegatecall(
sub(gas(), 5000),
_target,
add(_data, 0x20),
mload(_data),
0,
0
)
let size := returndatasize()
response := mload(0x40)
mstore(
0x40,
add(response, and(add(add(size, 0x20), 0x1f), not(0x1f)))
)
mstore(response, size)
returndatacopy(add(response, 0x20), 0, size)
switch iszero(succeeded)
case 1 {
// throw if delegatecall failed
revert(add(response, 0x20), size)
}
}
}
// **** Internal functions ****
function _swapUniswap(
address _from,
address _to,
uint256 _amount
) internal {
require(_to != address(0));
// Swap with uniswap
IERC20(_from).safeApprove(univ2Router2, 0);
IERC20(_from).safeApprove(univ2Router2, _amount);
address[] memory path;
if (_from == weth || _to == weth) {
path = new address[](2);
path[0] = _from;
path[1] = _to;
} else {
path = new address[](3);
path[0] = _from;
path[1] = weth;
path[2] = _to;
}
UniswapRouterV2(univ2Router2).swapExactTokensForTokens(
_amount,
0,
path,
address(this),
now.add(60)
);
}
function _swapUniswapWithPath(
address[] memory path,
uint256 _amount
) internal {
require(path[1] != address(0));
// Swap with uniswap
IERC20(path[0]).safeApprove(univ2Router2, 0);
IERC20(path[0]).safeApprove(univ2Router2, _amount);
UniswapRouterV2(univ2Router2).swapExactTokensForTokens(
_amount,
0,
path,
address(this),
now.add(60)
);
}
function _swapSushiswap(
address _from,
address _to,
uint256 _amount
) internal {
require(_to != address(0));
// Swap with uniswap
IERC20(_from).safeApprove(sushiRouter, 0);
IERC20(_from).safeApprove(sushiRouter, _amount);
address[] memory path;
if (_from == weth || _to == weth) {
path = new address[](2);
path[0] = _from;
path[1] = _to;
} else {
path = new address[](3);
path[0] = _from;
path[1] = weth;
path[2] = _to;
}
UniswapRouterV2(sushiRouter).swapExactTokensForTokens(
_amount,
0,
path,
address(this),
now.add(60)
);
}
function _swapSushiswapWithPath(
address[] memory path,
uint256 _amount
) internal {
require(path[1] != address(0));
// Swap with uniswap
IERC20(path[0]).safeApprove(sushiRouter, 0);
IERC20(path[0]).safeApprove(sushiRouter, _amount);
UniswapRouterV2(sushiRouter).swapExactTokensForTokens(
_amount,
0,
path,
address(this),
now.add(60)
);
}
function _distributePerformanceFeesAndDeposit() internal {
uint256 _want = IERC20(want).balanceOf(address(this));
if (_want > 0) {
// Treasury fees
IERC20(want).safeTransfer(
IController(controller).treasury(),
_want.mul(performanceTreasuryFee).div(performanceTreasuryMax)
);
// Performance fee
IERC20(want).safeTransfer(
IController(controller).devfund(),
_want.mul(performanceDevFee).div(performanceDevMax)
);
deposit();
}
}
}
////// src/strategies/curve/strategy-curve-stecrv.sol
// SPDX-License-Identifier: MIT
/* pragma solidity ^0.6.2; */
/* import "../../lib/erc20.sol"; */
/* import "../../lib/safe-math.sol"; */
/* import "../../interfaces/jar.sol"; */
/* import "../../interfaces/steth.sol"; */
/* import "../../interfaces/weth.sol"; */
/* import "../../interfaces/curve.sol"; */
/* import "../../interfaces/uniswapv2.sol"; */
/* import "../../interfaces/controller.sol"; */
/* import "../strategy-base.sol"; */
interface ICurveFi {
function add_liquidity(
// stETH pool
uint256[2] calldata amounts,
uint256 min_mint_amount
) external payable;
function balances(int128) external view returns (uint256);
}
contract StrategyCurveSteCRV is StrategyBase {
// Curve
IStEth public stEth = IStEth(0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84); // lido stEth
IERC20 public steCRV = IERC20(0x06325440D014e39736583c165C2963BA99fAf14E); // ETH-stETH curve lp
// curve dao
ICurveGauge public gauge = ICurveGauge(0x182B723a58739a9c974cFDB385ceaDb237453c28); // stEthGauge
ICurveFi public curve = ICurveFi(0xDC24316b9AE028F1497c275EB9192a3Ea0f67022); // stEthSwap
address public mintr = 0xd061D61a4d941c39E5453435B6345Dc261C2fcE0;
// tokens we're farming
IERC20 public constant crv = IERC20(0xD533a949740bb3306d119CC777fa900bA034cd52);
IERC20 public constant ldo = IERC20(0x5A98FcBEA516Cf06857215779Fd812CA3beF1B32);
// How much CRV tokens to keep
uint256 public keepCRV = 500;
uint256 public keepCRVMax = 10000;
constructor(
address _governance,
address _strategist,
address _controller,
address _timelock
)
public
StrategyBase(address(steCRV), _governance, _strategist, _controller, _timelock)
{
steCRV.approve(address(gauge), uint256(-1));
stEth.approve(address(curve), uint256(-1));
ldo.safeApprove(address(univ2Router2), uint256(-1));
crv.approve(address(univ2Router2), uint256(-1));
}
// swap for eth
receive() external payable {}
// **** Getters ****
function balanceOfPool() public override view returns (uint256) {
return gauge.balanceOf(address(this));
}
function getName() external override pure returns (string memory) {
return "StrategyCurveStETH";
}
function getHarvestable() external view returns (uint256) {
return gauge.claimable_reward(address(this), address(crv));
}
function getHarvestableEth() external view returns (uint256) {
uint256 claimableLdo = gauge.claimable_reward(address(this), address(ldo));
uint256 claimableCrv = gauge.claimable_reward(address(this), address(crv));
return _estimateSell(address(crv), claimableCrv).add(_estimateSell(address(ldo), claimableLdo));
}
function _estimateSell(address currency, uint256 amount) internal view returns (uint256 outAmount){
address[] memory path = new address[](2);
path[0] = currency;
path[1] = weth;
uint256[] memory amounts = UniswapRouterV2(univ2Router2).getAmountsOut(amount, path);
outAmount = amounts[amounts.length - 1];
return outAmount;
}
// **** Setters ****
function setKeepCRV(uint256 _keepCRV) external {
require(msg.sender == governance, "!governance");
keepCRV = _keepCRV;
}
// **** State Mutations ****
function deposit() public override {
uint256 _want = IERC20(want).balanceOf(address(this));
if (_want > 0) {
gauge.deposit(_want);
}
}
function _withdrawSome(uint256 _amount)
internal
override
returns (uint256)
{
gauge.withdraw(_amount);
return _amount;
}
function harvest() public override onlyBenevolent {
// Anyone can harvest it at any given time.
// I understand the possibility of being frontrun / sandwiched
// But ETH is a dark forest, and I wanna see how this plays out
// i.e. will be be heavily frontrunned/sandwiched?
// if so, a new strategy will be deployed.
gauge.claim_rewards();
ICurveMintr(mintr).mint(address(gauge));
uint256 _ldo = ldo.balanceOf(address(this));
uint256 _crv = crv.balanceOf(address(this));
if (_crv > 0) {
// How much CRV to keep to restake?
uint256 _keepCRV = _crv.mul(keepCRV).div(keepCRVMax);
// IERC20(crv).safeTransfer(address(crvLocker), _keepCRV);
if (_keepCRV > 0) {
IERC20(crv).safeTransfer(
IController(controller).treasury(),
_keepCRV
);
}
// How much CRV to swap?
_crv = _crv.sub(_keepCRV);
_swapUniswap(address(crv), weth, _crv);
}
if (_ldo > 0) {
_swapUniswap(address(ldo), weth, _ldo);
}
WETH(weth).withdraw(WETH(weth).balanceOf(address(this)));
uint256 _eth = address(this).balance;
stEth.submit{value: _eth/2}(strategist);
_eth = address(this).balance;
uint256 _stEth = stEth.balanceOf(address(this));
uint256[2] memory liquidity;
liquidity[0] = _eth;
liquidity[1] = _stEth;
curve.add_liquidity{value: _eth}(liquidity, 0);
// We want to get back sCRV
_distributePerformanceFeesAndDeposit();
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[{"internalType":"address","name":"_governance","type":"address"},{"internalType":"address","name":"_strategist","type":"address"},{"internalType":"address","name":"_controller","type":"address"},{"internalType":"address","name":"_timelock","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"balanceOfPool","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"balanceOfWant","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"controller","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"crv","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"curve","outputs":[{"internalType":"contract ICurveFi","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_target","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"execute","outputs":[{"internalType":"bytes","name":"response","type":"bytes"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"gauge","outputs":[{"internalType":"contract ICurveGauge","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getHarvestable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getHarvestableEth","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getName","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"governance","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"harvest","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"harvesters","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"keepCRV","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"keepCRVMax","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ldo","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"mintr","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"performanceDevFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"performanceDevMax","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"performanceTreasuryFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"performanceTreasuryMax","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_harvester","type":"address"}],"name":"revokeHarvester","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_controller","type":"address"}],"name":"setController","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_governance","type":"address"}],"name":"setGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_keepCRV","type":"uint256"}],"name":"setKeepCRV","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_performanceDevFee","type":"uint256"}],"name":"setPerformanceDevFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_performanceTreasuryFee","type":"uint256"}],"name":"setPerformanceTreasuryFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_strategist","type":"address"}],"name":"setStrategist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_timelock","type":"address"}],"name":"setTimelock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_withdrawalDevFundFee","type":"uint256"}],"name":"setWithdrawalDevFundFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_withdrawalTreasuryFee","type":"uint256"}],"name":"setWithdrawalTreasuryFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stEth","outputs":[{"internalType":"contract IStEth","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"steCRV","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"strategist","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sushiRouter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"timelock","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"univ2Router2","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"want","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"weth","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_harvester","type":"address"}],"name":"whitelistHarvester","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"_asset","type":"address"}],"name":"withdraw","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawAll","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdrawForSwap","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawalDevFundFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdrawalDevFundMax","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdrawalTreasuryFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdrawalTreasuryMax","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000d92c7faa0ca0e6ae4918f3a83d9832d9caeaa0d30000000000000000000000001cbf903de5d688eda7d6d895ea2f0a8f2a521e990000000000000000000000006847259b2b3a4c17e7c43c54409810af48ba5210000000000000000000000000d92c7faa0ca0e6ae4918f3a83d9832d9caeaa0d3
-----Decoded View---------------
Arg [0] : _governance (address): 0xD92c7fAa0Ca0e6AE4918f3a83d9832d9CAEAA0d3
Arg [1] : _strategist (address): 0x1CbF903De5D688eDa7D6D895ea2F0a8F2A521E99
Arg [2] : _controller (address): 0x6847259b2B3A4c17e7c43C54409810aF48bA5210
Arg [3] : _timelock (address): 0xD92c7fAa0Ca0e6AE4918f3a83d9832d9CAEAA0d3
-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000d92c7faa0ca0e6ae4918f3a83d9832d9caeaa0d3
Arg [1] : 0000000000000000000000001cbf903de5d688eda7d6d895ea2f0a8f2a521e99
Arg [2] : 0000000000000000000000006847259b2b3a4c17e7c43c54409810af48ba5210
Arg [3] : 000000000000000000000000d92c7faa0ca0e6ae4918f3a83d9832d9caeaa0d3
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Net Worth in USD
$2.32
Net Worth in ETH
0.000701
Token Allocations
LDO
100.00%
Multichain Portfolio | 35 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
|---|---|---|---|---|---|
| ETH | 100.00% | $0.618052 | 3.7471 | $2.32 |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.