Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @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].
*/
abstract 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() {
_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 making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// 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
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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);
/**
* @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 `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
uint256 amount
) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.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 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'
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) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @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
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @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
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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");
(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 functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// 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
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @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 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) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./interfaces/IPairInfo.sol";
import "./interfaces/IBribe.sol";
import {Constants} from "./libraries/Constants.sol";
interface IRewarder {
function onReward(
uint256 pid,
address user,
address recipient,
uint256 amount,
uint256 newLpAmount
) external;
}
interface IFeeVault {
function claimFees() external returns (uint256 claimed0, uint256 claimed1);
}
contract GaugeV2_CL is ReentrancyGuard, Ownable {
using SafeERC20 for IERC20;
address public constant TOKEN_WITHDRAWER = 0x4D5bCfc14282d930eE09bee96D3a7D5F338251C6;
bool public emergency;
IERC20 public rewardToken;
// IERC20 public _VE;
IERC20 public TOKEN;
address public DISTRIBUTION;
address public gaugeRewarder;
address public internal_bribe;
address public external_bribe;
address public feeVault;
address public feeVault2;
uint256 public rewarderPid; //default to 0
uint256 public DURATION;
uint256 public periodFinish;
uint256 public rewardRate;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
uint public fees0;
uint public fees1;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
uint256 public _totalSupply;
mapping(address => uint256) public _balances;
event RewardAdded(uint256 reward);
event Deposit(address indexed user, uint256 amount);
event Withdraw(address indexed user, uint256 amount);
event Harvest(address indexed user, uint256 reward);
event ClaimFees(address indexed from, uint claimed0, uint claimed1);
constructor(
address _rewardToken,
address /* _ve */,
address _token,
address _distribution,
address _internal_bribe,
address _external_bribe,
address _feeVault,
address _feeVault2
) {
rewardToken = IERC20(_rewardToken); // main reward
// _VE = IERC20(_ve); // vested
TOKEN = IERC20(_token); // underlying (LP)
DISTRIBUTION = _distribution; // distro address (voter)
DURATION = Constants.EPOCH_LENGTH; // distro time
internal_bribe = _internal_bribe; // lp fees goes here
external_bribe = _external_bribe; // bribe fees goes here
feeVault = _feeVault; // fee vault concentrated liqudity position (to send trading fees to internal bribe)
feeVault2 = _feeVault2; // fee vault concentrated liqudity position (to send trading fees to nft staking and treasury)
// emergency = false; // emergency flag
}
/* -----------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
ONLY OWNER
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
----------------------------------------------------------------------------- */
///@notice set distribution address (should be GaugeProxyL2)
function setDistribution(address _distribution) external onlyOwner {
require(_distribution != address(0) && _distribution != DISTRIBUTION);
DISTRIBUTION = _distribution;
}
///@notice set gauge rewarder address
function setGaugeRewarder(address _gaugeRewarder) external onlyOwner {
require(_gaugeRewarder != gaugeRewarder);
gaugeRewarder = _gaugeRewarder;
}
///@notice set feeVault address
function setFeeVaults(
address _feeVault,
address _feeVault2
) external onlyOwner {
require(
_feeVault != address(0) &&
_feeVault2 != address(0) &&
_feeVault != feeVault &&
_feeVault2 != feeVault2
);
feeVault = _feeVault;
feeVault2 = _feeVault2;
}
///@notice set extra rewarder pid
function setRewarderPid(uint256 _pid) external onlyOwner {
require(/* _pid >= 0 && */ _pid != rewarderPid);
rewarderPid = _pid;
}
///@notice set new internal bribe contract (where to send fees)
function setInternalBribe(address _int) external onlyOwner {
require(_int >= address(0));
internal_bribe = _int;
}
function activateEmergencyMode() external onlyOwner {
require(!emergency);
emergency = true;
}
function stopEmergencyMode() external onlyOwner {
require(emergency);
emergency = false;
}
function withdrawExcess(address token, uint256 amount) external {
require(msg.sender == TOKEN_WITHDRAWER);
require(address(TOKEN) != token && token != address(0) && amount > 0);
IERC20(token).safeTransfer(msg.sender, amount);
}
/* -----------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
VIEW FUNCTIONS
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
----------------------------------------------------------------------------- */
///@notice total supply held
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
///@notice balance of a user
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
///@notice last time reward
function lastTimeRewardApplicable() public view returns (uint256) {
return block.timestamp < periodFinish ? block.timestamp : periodFinish;
}
///@notice reward for a sinle token
function rewardPerToken() public view returns (uint256) {
if (_totalSupply == 0) {
return rewardPerTokenStored;
} else {
return
rewardPerTokenStored +
(((lastTimeRewardApplicable() - lastUpdateTime) *
rewardRate *
1e18) / _totalSupply);
}
}
///@notice see earned rewards for user
function earned(address account) public view returns (uint256) {
return
(_balances[account] *
(rewardPerToken() - userRewardPerTokenPaid[account])) /
1e18 +
rewards[account];
}
///@notice get total reward for the duration
function rewardForDuration() external view returns (uint256) {
// return rewardRate.mul(DURATION);
return rewardRate * DURATION;
}
function _periodFinish() external view returns (uint256) {
return periodFinish;
}
/* -----------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
USER INTERACTION
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
----------------------------------------------------------------------------- */
///@notice deposit all TOKEN of msg.sender
function depositAll() external {
_deposit(TOKEN.balanceOf(msg.sender), msg.sender);
}
///@notice deposit amount TOKEN
function deposit(uint256 amount) external {
_deposit(amount, msg.sender);
}
///@notice deposit internal
function _deposit(uint256 amount, address account) internal nonReentrant {
require(!emergency);
_updateReward(account);
require(amount > 0);
_balances[account] += amount;
_totalSupply += amount;
if (address(gaugeRewarder) != address(0)) {
IRewarder(gaugeRewarder).onReward(
rewarderPid,
account,
account,
0,
_balances[account]
);
}
TOKEN.safeTransferFrom(account, address(this), amount);
emit Deposit(account, amount);
}
///@notice withdraw all token
function withdrawAll() external {
_withdraw(_balances[msg.sender]);
}
///@notice withdraw a certain amount of TOKEN
function withdraw(uint256 amount) external {
_withdraw(amount);
}
///@notice withdraw internal
function _withdraw(uint256 amount) internal nonReentrant {
require(!emergency);
_updateReward(msg.sender);
require(
amount > 0 && _totalSupply >= amount && _balances[msg.sender] > 0
);
_totalSupply -= amount;
_balances[msg.sender] -= amount;
if (address(gaugeRewarder) != address(0)) {
IRewarder(gaugeRewarder).onReward(
rewarderPid,
msg.sender,
msg.sender,
0,
_balances[msg.sender]
);
}
TOKEN.safeTransfer(msg.sender, amount);
emit Withdraw(msg.sender, amount);
}
function emergencyWithdraw() external nonReentrant {
require(emergency);
require(_balances[msg.sender] > 0);
uint256 _amount = _balances[msg.sender];
_totalSupply -= _amount;
_balances[msg.sender] = 0;
if (address(gaugeRewarder) != address(0)) {
try
IRewarder(gaugeRewarder).onReward(
rewarderPid,
msg.sender,
msg.sender,
0,
_balances[msg.sender]
)
{
//
} catch {
//
}
}
TOKEN.safeTransfer(msg.sender, _amount);
emit Withdraw(msg.sender, _amount);
}
function emergencyWithdrawAmount(uint256 _amount) external nonReentrant {
require(emergency);
require(_balances[msg.sender] >= _amount);
_totalSupply -= _amount;
_balances[msg.sender] -= _amount;
if (address(gaugeRewarder) != address(0)) {
try
IRewarder(gaugeRewarder).onReward(
rewarderPid,
msg.sender,
msg.sender,
0,
_balances[msg.sender]
)
{
//
} catch {
//
}
}
TOKEN.safeTransfer(msg.sender, _amount);
emit Withdraw(msg.sender, _amount);
}
///@notice withdraw all TOKEN and harvest rewardToken
function withdrawAllAndHarvest() external {
_withdraw(_balances[msg.sender]);
getReward();
}
///@notice User harvest function called from distribution (voter allows harvest on multiple gauges)
function getReward(address _user) public nonReentrant {
require(msg.sender == DISTRIBUTION);
_updateReward(_user);
uint256 reward = rewards[_user];
if (reward > 0) {
rewards[_user] = 0;
rewardToken.safeTransfer(_user, reward);
emit Harvest(_user, reward);
}
if (gaugeRewarder != address(0)) {
IRewarder(gaugeRewarder).onReward(
rewarderPid,
_user,
_user,
reward,
_balances[_user]
);
}
}
///@notice User harvest function
function getReward() public nonReentrant {
_updateReward(msg.sender);
uint256 reward = rewards[msg.sender];
if (reward > 0) {
rewards[msg.sender] = 0;
rewardToken.safeTransfer(msg.sender, reward);
emit Harvest(msg.sender, reward);
}
if (gaugeRewarder != address(0)) {
IRewarder(gaugeRewarder).onReward(
rewarderPid,
msg.sender,
msg.sender,
reward,
_balances[msg.sender]
);
}
}
/* -----------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
DISTRIBUTION
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
----------------------------------------------------------------------------- */
/// @dev Receive rewards from distribution
function notifyRewardAmount(
address token,
uint reward
) external nonReentrant {
require(!emergency);
require(msg.sender == DISTRIBUTION);
_updateReward(address(0));
require(token == address(rewardToken));
rewardToken.safeTransferFrom(DISTRIBUTION, address(this), reward);
if (block.timestamp >= periodFinish) {
rewardRate = reward / DURATION;
} else {
uint256 remaining = periodFinish - block.timestamp;
uint256 leftover = remaining * rewardRate;
rewardRate = (reward + leftover) / DURATION;
}
// Ensure the provided reward amount is not more than the balance in the contract.
// This keeps the reward rate in the right range, preventing overflows due to
// very high values of rewardRate in the earned and rewardsPerToken functions;
// Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.
uint256 balance = rewardToken.balanceOf(address(this));
require(rewardRate <= balance / DURATION);
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp + DURATION;
emit RewardAdded(reward);
}
function claimFees()
external
nonReentrant
returns (uint claimed0, uint claimed1)
{
return _claimFees();
}
function _claimFees() internal returns (uint claimed0, uint claimed1) {
address _token = address(TOKEN);
(claimed0, claimed1) = IFeeVault(feeVault).claimFees();
IFeeVault(feeVault2).claimFees();
if (claimed0 > 0 || claimed1 > 0) {
uint _fees0 = fees0 + claimed0;
uint _fees1 = fees1 + claimed1;
address _token0 = IPairInfo(_token).token0();
address _token1 = IPairInfo(_token).token1();
if (_fees0 > 0) {
fees0 = 0;
IERC20(_token0).approve(internal_bribe, 0);
IERC20(_token0).approve(internal_bribe, _fees0);
IBribe(internal_bribe).notifyRewardAmount(_token0, _fees0);
} else {
fees0 = _fees0;
}
if (_fees1 > 0) {
fees1 = 0;
IERC20(_token1).approve(internal_bribe, 0);
IERC20(_token1).approve(internal_bribe, _fees1);
IBribe(internal_bribe).notifyRewardAmount(_token1, _fees1);
} else {
fees1 = _fees1;
}
emit ClaimFees(msg.sender, claimed0, claimed1);
}
}
function _updateReward(address account) private {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;
interface IBribe {
function _deposit(uint amount, uint tokenId) external;
function _withdraw(uint amount, uint tokenId) external;
function getRewardForOwner(uint tokenId, address[] memory tokens) external;
function getRewardForAddress(address _owner, address[] memory tokens) external;
function notifyRewardAmount(address token, uint amount) external;
function left(address token) external view returns (uint);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;
interface IPairInfo {
function token0() external view returns(address);
function reserve0() external view returns(uint);
function decimals0() external view returns(uint);
function token1() external view returns(address);
function reserve1() external view returns(uint);
function decimals1() external view returns(uint);
function isPair(address _pair) external view returns(bool);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;
library Constants {
uint256 internal constant EPOCH_LENGTH = 3600;//7 days;
}