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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x2c9BBC37...8746bA7a7 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
VirtualBalanceRewardPool
Compiler Version
v0.6.12+commit.27d51765
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; /** *Submitted for verification at Etherscan.io on 2020-07-17 */ /* ____ __ __ __ _ / __/__ __ ___ / /_ / / ___ / /_ (_)__ __ _\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ / /___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\ /___/ * Synthetix: VirtualBalanceRewardPool.sol * * Docs: https://docs.synthetix.io/ * * * MIT License * =========== * * Copyright (c) 2020 Synthetix * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */ import "./Interfaces.sol"; import "./interfaces/MathUtil.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; abstract contract VirtualBalanceWrapper { using SafeMath for uint256; using SafeERC20 for IERC20; IDeposit public immutable deposits; constructor(address deposit_) internal { deposits = IDeposit(deposit_); } function totalSupply() public view returns (uint256) { return deposits.totalSupply(); } function balanceOf(address account) public view returns (uint256) { return deposits.balanceOf(account); } } /** * @title VirtualBalanceRewardPool * @author ConvexFinance * @notice Reward pool used for ExtraRewards in Booster lockFees (3crv) and * Extra reward stashes * @dev The rewards are sent to this contract for distribution to stakers. This * contract does not hold any of the staking tokens it just maintains a virtual * balance of what a user has staked in the staking pool (BaseRewardPool). * For example the Booster sends veCRV fees (3Crv) to a VirtualBalanceRewardPool * which tracks the virtual balance of cxvCRV stakers and distributes their share * of 3Crv rewards */ contract VirtualBalanceRewardPool is VirtualBalanceWrapper { using SafeERC20 for IERC20; IERC20 public immutable rewardToken; uint256 public constant duration = 7 days; address public immutable operator; uint256 public periodFinish = 0; uint256 public rewardRate = 0; uint256 public lastUpdateTime; uint256 public rewardPerTokenStored; uint256 public queuedRewards = 0; uint256 public currentRewards = 0; uint256 public historicalRewards = 0; uint256 public constant newRewardRatio = 830; mapping(address => uint256) public userRewardPerTokenPaid; mapping(address => uint256) public rewards; event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Withdrawn(address indexed user, uint256 amount); event RewardPaid(address indexed user, uint256 reward); /** * @param deposit_ Parent deposit pool e.g cvxCRV staking in BaseRewardPool * @param reward_ The rewards token e.g 3Crv * @param op_ Operator contract (Booster) */ constructor( address deposit_, address reward_, address op_ ) public VirtualBalanceWrapper(deposit_) { rewardToken = IERC20(reward_); operator = op_; } /** * @notice Update rewards earned by this account */ modifier updateReward(address account) { rewardPerTokenStored = rewardPerToken(); lastUpdateTime = lastTimeRewardApplicable(); if (account != address(0)) { rewards[account] = earned(account); userRewardPerTokenPaid[account] = rewardPerTokenStored; } _; } function lastTimeRewardApplicable() public view returns (uint256) { return MathUtil.min(block.timestamp, periodFinish); } function rewardPerToken() public view returns (uint256) { if (totalSupply() == 0) { return rewardPerTokenStored; } return rewardPerTokenStored.add( lastTimeRewardApplicable() .sub(lastUpdateTime) .mul(rewardRate) .mul(1e18) .div(totalSupply()) ); } function earned(address account) public view returns (uint256) { return balanceOf(account) .mul(rewardPerToken().sub(userRewardPerTokenPaid[account])) .div(1e18) .add(rewards[account]); } /** * @notice Update reward, emit, call linked reward's stake * @dev Callable by the deposits address which is the BaseRewardPool * this updates the virtual balance of this user as this contract doesn't * actually hold any staked tokens it just diributes reward tokens */ function stake(address _account, uint256 amount) external updateReward(_account) { require(msg.sender == address(deposits), "!authorized"); // require(amount > 0, 'VirtualDepositRewardPool: Cannot stake 0'); emit Staked(_account, amount); } /** * @notice Withdraw stake and update reward, emit, call linked reward's stake * @dev See stake */ function withdraw(address _account, uint256 amount) public updateReward(_account) { require(msg.sender == address(deposits), "!authorized"); //require(amount > 0, 'VirtualDepositRewardPool : Cannot withdraw 0'); emit Withdrawn(_account, amount); } /** * @notice Get rewards for this account * @dev This can be called directly but it is usually called by the * BaseRewardPool getReward when the BaseRewardPool loops through * it's extraRewards array calling getReward on all of them */ function getReward(address _account) public updateReward(_account){ uint256 reward = earned(_account); if (reward > 0) { rewards[_account] = 0; rewardToken.safeTransfer(_account, reward); emit RewardPaid(_account, reward); } } function getReward() external{ getReward(msg.sender); } function donate(uint256 _amount) external returns(bool){ IERC20(rewardToken).safeTransferFrom(msg.sender, address(this), _amount); queuedRewards = queuedRewards.add(_amount); } function queueNewRewards(uint256 _rewards) external{ require(msg.sender == operator, "!authorized"); _rewards = _rewards.add(queuedRewards); if (block.timestamp >= periodFinish) { notifyRewardAmount(_rewards); queuedRewards = 0; return; } //et = now - (finish-duration) uint256 elapsedTime = block.timestamp.sub(periodFinish.sub(duration)); //current at now: rewardRate * elapsedTime uint256 currentAtNow = rewardRate * elapsedTime; uint256 queuedRatio = currentAtNow.mul(1000).div(_rewards); if(queuedRatio < newRewardRatio){ notifyRewardAmount(_rewards); queuedRewards = 0; }else{ queuedRewards = _rewards; } } function notifyRewardAmount(uint256 reward) internal updateReward(address(0)) { historicalRewards = historicalRewards.add(reward); if (block.timestamp >= periodFinish) { rewardRate = reward.div(duration); } else { uint256 remaining = periodFinish.sub(block.timestamp); uint256 leftover = remaining.mul(rewardRate); reward = reward.add(leftover); rewardRate = reward.div(duration); } currentRewards = reward; lastUpdateTime = block.timestamp; periodFinish = block.timestamp.add(duration); emit RewardAdded(reward); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title ArbitratorVault * @author ConvexFinance * @notice Hold extra reward tokens on behalf of pools that have the same token as a reward (e.g. stkAAVE fro multiple aave pools) * @dev Sits on top of the STASH to basically handle the re-distribution of rewards to multiple stashes. * Because anyone can call gauge.claim_rewards(address) for the convex staking contract, rewards * could be forced to the wrong pool. Hold tokens here and distribute fairly(or at least more fairly), * to both pools at a later timing. */ contract ArbitratorVault{ using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public operator; address public immutable depositor; /** * @param _depositor Booster address */ constructor(address _depositor)public { operator = msg.sender; depositor = _depositor; } function setOperator(address _op) external { require(msg.sender == operator, "!auth"); operator = _op; } /** * @notice Permissioned fn to distribute any accrued rewards to a relevant stash * @dev Only called by operator: ConvexMultisig */ function distribute(address _token, uint256[] calldata _toPids, uint256[] calldata _amounts) external { require(msg.sender == operator, "!auth"); for(uint256 i = 0; i < _toPids.length; i++){ //get stash from pid (,,,,address stashAddress,bool shutdown) = IDeposit(depositor).poolInfo(_toPids[i]); //if sent to a shutdown pool, could get trapped require(shutdown==false,"pool closed"); //transfer IERC20(_token).safeTransfer(stashAddress, _amounts[i]); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; interface ICurveGauge { function deposit(uint256) external; function balanceOf(address) external view returns (uint256); function withdraw(uint256) external; function claim_rewards() external; function reward_tokens(uint256) external view returns(address);//v2 function rewarded_token() external view returns(address);//v1 function lp_token() external view returns(address); } interface ICurveVoteEscrow { function create_lock(uint256, uint256) external; function increase_amount(uint256) external; function increase_unlock_time(uint256) external; function withdraw() external; function smart_wallet_checker() external view returns (address); function commit_smart_wallet_checker(address) external; function apply_smart_wallet_checker() external; } interface IWalletChecker { function check(address) external view returns (bool); function approveWallet(address) external; function dao() external view returns (address); } interface IVoting{ function vote(uint256, bool, bool) external; //voteId, support, executeIfDecided function getVote(uint256) external view returns(bool,bool,uint64,uint64,uint64,uint64,uint256,uint256,uint256,bytes memory); function vote_for_gauge_weights(address,uint256) external; } interface IMinter{ function mint(address) external; } interface IStaker{ function deposit(address, address) external returns (bool); function withdraw(address) external returns (uint256); function withdraw(address, address, uint256) external returns (bool); function withdrawAll(address, address) external returns (bool); function createLock(uint256, uint256) external returns(bool); function increaseAmount(uint256) external returns(bool); function increaseTime(uint256) external returns(bool); function release() external returns(bool); function claimCrv(address) external returns (uint256); function claimRewards(address) external returns(bool); function claimFees(address,address) external returns (uint256); function setStashAccess(address, bool) external returns (bool); function vote(uint256,address,bool) external returns(bool); function voteGaugeWeight(address,uint256) external returns(bool); function balanceOfPool(address) external view returns (uint256); function operator() external view returns (address); function execute(address _to, uint256 _value, bytes calldata _data) external returns (bool, bytes memory); function setVote(bytes32 hash, bool valid) external; function migrate(address to) external; } interface IRewards{ function stake(address, uint256) external; function stakeFor(address, uint256) external; function withdraw(address, uint256) external; function exit(address) external; function getReward(address) external; function queueNewRewards(uint256) external; function notifyRewardAmount(uint256) external; function addExtraReward(address) external; function extraRewardsLength() external view returns (uint256); function stakingToken() external view returns (address); function rewardToken() external view returns(address); function earned(address account) external view returns (uint256); } interface IStash{ function stashRewards() external returns (bool); function processStash() external returns (bool); function claimRewards() external returns (bool); function initialize(uint256 _pid, address _operator, address _staker, address _gauge, address _rewardFactory) external; } interface IFeeDistributor { function claimToken(address user, address token) external returns (uint256); function claimTokens(address user, address[] calldata tokens) external returns (uint256[] memory); function getTokenTimeCursor(address token) external view returns (uint256); } interface ITokenMinter{ function mint(address,uint256) external; function burn(address,uint256) external; } interface IDeposit{ function isShutdown() external view returns(bool); function balanceOf(address _account) external view returns(uint256); function totalSupply() external view returns(uint256); function poolInfo(uint256) external view returns(address,address,address,address,address, bool); function rewardClaimed(uint256,address,uint256) external; function withdrawTo(uint256,uint256,address) external; function claimRewards(uint256,address) external returns(bool); function rewardArbitrator() external returns(address); function setGaugeRedirect(uint256 _pid) external returns(bool); function owner() external returns(address); function deposit(uint256 _pid, uint256 _amount, bool _stake) external returns(bool); } interface ICrvDeposit{ function deposit(uint256, bool) external; function lockIncentive() external view returns(uint256); } interface IRewardFactory{ function setAccess(address,bool) external; function CreateCrvRewards(uint256,address,address) external returns(address); function CreateTokenRewards(address,address,address) external returns(address); function activeRewardCount(address) external view returns(uint256); function addActiveReward(address,uint256) external returns(bool); function removeActiveReward(address,uint256) external returns(bool); } interface IStashFactory{ function CreateStash(uint256,address,address,uint256) external returns(address); } interface ITokenFactory{ function CreateDepositToken(address) external returns(address); } interface IPools{ function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool); function forceAddPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool); function shutdownPool(uint256 _pid) external returns(bool); function poolInfo(uint256) external view returns(address,address,address,address,address,bool); function poolLength() external view returns (uint256); function gaugeMap(address) external view returns(bool); function setPoolManager(address _poolM) external; } interface IVestedEscrow{ function fund(address[] calldata _recipient, uint256[] calldata _amount) external returns(bool); } interface IRewardDeposit { function addReward(address, uint256) external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @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, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } /** * @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) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } /** * @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) { 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, reverting 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) { require(b > 0, "SafeMath: division by zero"); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting 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) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * 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); return a - b; } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * 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); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.2 <0.8.0; /** * @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"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(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) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(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) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "./IERC20.sol"; import "../../math/SafeMath.sol"; import "../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title VoterProxy * @author ConvexFinance * @notice VoterProxy whitelisted in the curve SmartWalletWhitelist that * participates in Curve governance. Also handles all deposits since this is * the address that has the voting power. */ contract VoterProxy { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public mintr; address public immutable crv; address public immutable crvBpt; address public immutable escrow; address public gaugeController; address public rewardDeposit; address public withdrawer; address public owner; address public operator; address public depositor; mapping (address => bool) private stashPool; mapping (address => bool) private protectedTokens; mapping (bytes32 => bool) private votes; bytes4 constant internal EIP1271_MAGIC_VALUE = 0x1626ba7e; event VoteSet(bytes32 hash, bool valid); /** * @param _mintr CRV minter * @param _crv CRV Token address * @param _crvBpt CRV:ETH 80-20 BPT Token address * @param _escrow Curve Voting escrow contract * @param _gaugeController Curve Gauge Controller * Controls liquidity gauges and the issuance of coins through the gauges */ constructor( address _mintr, address _crv, address _crvBpt, address _escrow, address _gaugeController ) public { mintr = _mintr; crv = _crv; crvBpt = _crvBpt; escrow = _escrow; gaugeController = _gaugeController; owner = msg.sender; protectedTokens[_crv] = true; protectedTokens[_crvBpt] = true; } function getName() external pure returns (string memory) { return "BalancerVoterProxy"; } function setOwner(address _owner) external { require(msg.sender == owner, "!auth"); owner = _owner; } /** * @notice Allows dao to set the reward withdrawal address * @param _withdrawer Whitelisted withdrawer * @param _rewardDeposit Distributor address */ function setRewardDeposit(address _withdrawer, address _rewardDeposit) external { require(msg.sender == owner, "!auth"); withdrawer = _withdrawer; rewardDeposit = _rewardDeposit; } /** * @notice Allows dao to set the external system config, should it change in the future * @param _gaugeController External gauge controller address * @param _mintr Token minter address for claiming rewards */ function setSystemConfig(address _gaugeController, address _mintr) external returns (bool) { require(msg.sender == owner, "!auth"); gaugeController = _gaugeController; mintr = _mintr; return true; } /** * @notice Set the operator of the VoterProxy * @param _operator Address of the operator (Booster) */ function setOperator(address _operator) external { require(msg.sender == owner, "!auth"); require(operator == address(0) || IDeposit(operator).isShutdown() == true, "needs shutdown"); operator = _operator; } /** * @notice Set the depositor of the VoterProxy * @param _depositor Address of the depositor (CrvDepositor) */ function setDepositor(address _depositor) external { require(msg.sender == owner, "!auth"); depositor = _depositor; } function setStashAccess(address _stash, bool _status) external returns(bool){ require(msg.sender == operator, "!auth"); if(_stash != address(0)){ stashPool[_stash] = _status; } return true; } /** * @notice Save a vote hash so when snapshot.org asks this contract if * a vote signature is valid we are able to check for a valid hash * and return the appropriate response inline with EIP 1721 * @param _hash Hash of vote signature that was sent to snapshot.org * @param _valid Is the hash valid */ function setVote(bytes32 _hash, bool _valid) external { require(msg.sender == operator, "!auth"); votes[_hash] = _valid; emit VoteSet(_hash, _valid); } /** * @notice Verifies that the hash is valid * @dev Snapshot Hub will call this function when a vote is submitted using * snapshot.js on behalf of this contract. Snapshot Hub will call this * function with the hash and the signature of the vote that was cast. * @param _hash Hash of the message that was sent to Snapshot Hub to cast a vote * @return EIP1271 magic value if the signature is value */ function isValidSignature(bytes32 _hash, bytes memory) public view returns (bytes4) { if(votes[_hash]) { return EIP1271_MAGIC_VALUE; } else { return 0xffffffff; } } /** * @notice Deposit tokens into the Curve Gauge * @dev Only can be called by the operator (Booster) once this contract has been * whitelisted by the Curve DAO * @param _token Deposit LP token address * @param _gauge Gauge contract to deposit to */ function deposit(address _token, address _gauge) external returns(bool){ require(msg.sender == operator, "!auth"); if(protectedTokens[_token] == false){ protectedTokens[_token] = true; } if(protectedTokens[_gauge] == false){ protectedTokens[_gauge] = true; } uint256 balance = IERC20(_token).balanceOf(address(this)); if (balance > 0) { IERC20(_token).safeApprove(_gauge, 0); IERC20(_token).safeApprove(_gauge, balance); ICurveGauge(_gauge).deposit(balance); } return true; } /** * @notice Withdraw ERC20 tokens that have been distributed as extra rewards * @dev Tokens shouldn't end up here if they can help it. However, dao can * set a withdrawer that can process these to some ExtraRewardDistribution. */ function withdraw(IERC20 _asset) external returns (uint256 balance) { require(msg.sender == withdrawer, "!auth"); require(protectedTokens[address(_asset)] == false, "protected"); balance = _asset.balanceOf(address(this)); _asset.safeApprove(rewardDeposit, 0); _asset.safeApprove(rewardDeposit, balance); IRewardDeposit(rewardDeposit).addReward(address(_asset), balance); return balance; } /** * @notice Withdraw LP tokens from a gauge * @dev Only callable by the operator * @param _token LP token address * @param _gauge Gauge for this LP token * @param _amount Amount of LP token to withdraw */ function withdraw(address _token, address _gauge, uint256 _amount) public returns(bool){ require(msg.sender == operator, "!auth"); uint256 _balance = IERC20(_token).balanceOf(address(this)); if (_balance < _amount) { _amount = _withdrawSome(_gauge, _amount.sub(_balance)); _amount = _amount.add(_balance); } IERC20(_token).safeTransfer(msg.sender, _amount); return true; } /** * @notice Withdraw all LP tokens from a gauge * @dev Only callable by the operator * @param _token LP token address * @param _gauge Gauge for this LP token */ function withdrawAll(address _token, address _gauge) external returns(bool){ require(msg.sender == operator, "!auth"); uint256 amount = balanceOfPool(_gauge).add(IERC20(_token).balanceOf(address(this))); withdraw(_token, _gauge, amount); return true; } function _withdrawSome(address _gauge, uint256 _amount) internal returns (uint256) { ICurveGauge(_gauge).withdraw(_amount); return _amount; } /** * @notice Lock CRV in Curve's voting escrow contract * @dev Called by the CrvDepositor contract * @param _value Amount of crv to lock * @param _unlockTime Timestamp to unlock (max is 4 years) */ function createLock(uint256 _value, uint256 _unlockTime) external returns(bool){ require(msg.sender == depositor, "!auth"); IERC20(crvBpt).safeApprove(escrow, 0); IERC20(crvBpt).safeApprove(escrow, _value); ICurveVoteEscrow(escrow).create_lock(_value, _unlockTime); return true; } /** * @notice Called by the CrvDepositor to increase amount of locked curve */ function increaseAmount(uint256 _value) external returns(bool){ require(msg.sender == depositor, "!auth"); IERC20(crvBpt).safeApprove(escrow, 0); IERC20(crvBpt).safeApprove(escrow, _value); ICurveVoteEscrow(escrow).increase_amount(_value); return true; } /** * @notice Called by the CrvDepositor to increase unlocked time of curve * @param _value Timestamp to increase locking to */ function increaseTime(uint256 _value) external returns(bool){ require(msg.sender == depositor, "!auth"); ICurveVoteEscrow(escrow).increase_unlock_time(_value); return true; } /** * @notice Withdraw all CRV from Curve's voting escrow contract * @dev Only callable by CrvDepositor and can only withdraw if lock has expired */ function release() external returns(bool){ require(msg.sender == depositor, "!auth"); ICurveVoteEscrow(escrow).withdraw(); return true; } /** * @notice Vote on CRV DAO for proposal */ function vote(uint256 _voteId, address _votingAddress, bool _support) external returns(bool){ require(msg.sender == operator, "!auth"); IVoting(_votingAddress).vote(_voteId,_support,false); return true; } /** * @notice Vote for a single gauge weight via the controller */ function voteGaugeWeight(address _gauge, uint256 _weight) external returns(bool){ require(msg.sender == operator, "!auth"); //vote IVoting(gaugeController).vote_for_gauge_weights(_gauge, _weight); return true; } /** * @notice Claim CRV from Curve * @dev Claim CRV for LP token staking from the CRV minter contract */ function claimCrv(address _gauge) external returns (uint256){ require(msg.sender == operator, "!auth"); uint256 _balance = 0; try IMinter(mintr).mint(_gauge){ _balance = IERC20(crv).balanceOf(address(this)); IERC20(crv).safeTransfer(operator, _balance); }catch{} return _balance; } /** * @notice Claim extra rewards from gauge * @dev Called by operator (Booster) to claim extra rewards */ function claimRewards(address _gauge) external returns(bool){ require(msg.sender == operator, "!auth"); ICurveGauge(_gauge).claim_rewards(); return true; } /** * @notice Claim fees (3crv) from staking lp tokens * @dev Only callable by the operator Booster * @param _distroContract Fee distribution contract * @param _token LP token to claim fees for */ function claimFees(address _distroContract, address _token) external returns (uint256){ require(msg.sender == operator, "!auth"); IFeeDistributor(_distroContract).claimToken(address(this), _token); uint256 _balance = IERC20(_token).balanceOf(address(this)); IERC20(_token).safeTransfer(operator, _balance); return _balance; } function balanceOfPool(address _gauge) public view returns (uint256) { return ICurveGauge(_gauge).balanceOf(address(this)); } function execute( address _to, uint256 _value, bytes calldata _data ) external returns (bool, bytes memory) { require(msg.sender == operator,"!auth"); (bool success, bytes memory result) = _to.call{value:_value}(_data); require(success, "!success"); return (success, result); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "./DepositToken.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title TokenFactory * @author ConvexFinance * @notice Token factory used to create Deposit Tokens. These are the tokenized * pool deposit tokens e.g cvx3crv */ contract TokenFactory { using Address for address; address public immutable operator; string public namePostfix; string public symbolPrefix; event DepositTokenCreated(address token, address lpToken); /** * @param _operator Operator is Booster * @param _namePostfix Postfixes lpToken name * @param _symbolPrefix Prefixed lpToken symbol */ constructor( address _operator, string memory _namePostfix, string memory _symbolPrefix ) public { operator = _operator; namePostfix = _namePostfix; symbolPrefix = _symbolPrefix; } function CreateDepositToken(address _lptoken) external returns(address){ require(msg.sender == operator, "!authorized"); DepositToken dtoken = new DepositToken(operator,_lptoken,namePostfix,symbolPrefix); emit DepositTokenCreated(address(dtoken), _lptoken); return address(dtoken); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/ERC20.sol"; /** * @title DepositToken * @author ConvexFinance * @notice Simply creates a token that can be minted and burned from the operator */ contract DepositToken is ERC20 { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public operator; /** * @param _operator Booster * @param _lptoken Underlying LP token for deposits * @param _namePostfix Postfixes lpToken name * @param _symbolPrefix Prefixed lpToken symbol */ constructor( address _operator, address _lptoken, string memory _namePostfix, string memory _symbolPrefix ) public ERC20( string( abi.encodePacked(ERC20(_lptoken).name(), _namePostfix) ), string(abi.encodePacked(_symbolPrefix, ERC20(_lptoken).symbol())) ) { operator = _operator; } function mint(address _to, uint256 _amount) external { require(msg.sender == operator, "!authorized"); _mint(_to, _amount); } function burn(address _from, uint256 _amount) external { require(msg.sender == operator, "!authorized"); _burn(_from, _amount); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "../../utils/Context.sol"; import "./IERC20.sol"; import "../../math/SafeMath.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; 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 virtual returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual 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 virtual returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual 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 virtual { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <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 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; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "./interfaces/IProxyFactory.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title StashFactoryV2 * @author ConvexFinance * @notice Factory to deploy reward stash contracts that handle extra rewards */ contract StashFactoryV2 { using Address for address; bytes4 private constant rewarded_token = 0x16fa50b1; //rewarded_token() bytes4 private constant reward_tokens = 0x54c49fe9; //reward_tokens(uint256) bytes4 private constant rewards_receiver = 0x01ddabf1; //rewards_receiver(address) address public immutable operator; address public immutable rewardFactory; address public immutable proxyFactory; address public v1Implementation; address public v2Implementation; address public v3Implementation; event StashCreated(address stash, uint256 stashVersion); /** * @param _operator Operator is Booster * @param _rewardFactory Factory that creates reward contract that are * VirtualBalanceRewardPool's used for extra pool rewards * @param _proxyFactory Deploy proxies with stash implementation */ constructor(address _operator, address _rewardFactory, address _proxyFactory) public { operator = _operator; rewardFactory = _rewardFactory; proxyFactory = _proxyFactory; } function setImplementation(address _v1, address _v2, address _v3) external{ require(msg.sender == IDeposit(operator).owner(),"!auth"); v1Implementation = _v1; v2Implementation = _v2; v3Implementation = _v3; } //Create a stash contract for the given gauge. //function calls are different depending on the version of curve gauges so determine which stash type is needed function CreateStash(uint256 _pid, address _gauge, address _staker, uint256 _stashVersion) external returns(address){ require(msg.sender == operator, "!authorized"); require(_gauge != address(0), "!gauge"); if(_stashVersion == uint256(3) && IsV3(_gauge)){ //v3 require(v3Implementation!=address(0),"0 impl"); address stash = IProxyFactory(proxyFactory).clone(v3Implementation); IStash(stash).initialize(_pid,operator,_staker,_gauge,rewardFactory); emit StashCreated(stash, _stashVersion); return stash; }else if(_stashVersion == uint256(1) && IsV1(_gauge)){ //v1 require(v1Implementation!=address(0),"0 impl"); address stash = IProxyFactory(proxyFactory).clone(v1Implementation); IStash(stash).initialize(_pid,operator,_staker,_gauge,rewardFactory); emit StashCreated(stash, _stashVersion); return stash; }else if(_stashVersion == uint256(2) && !IsV3(_gauge) && IsV2(_gauge)){ //v2 require(v2Implementation!=address(0),"0 impl"); address stash = IProxyFactory(proxyFactory).clone(v2Implementation); IStash(stash).initialize(_pid,operator,_staker,_gauge,rewardFactory); emit StashCreated(stash, _stashVersion); return stash; } bool isV1 = IsV1(_gauge); bool isV2 = IsV2(_gauge); bool isV3 = IsV3(_gauge); require(!isV1 && !isV2 && !isV3,"stash version mismatch"); return address(0); } function IsV1(address _gauge) private returns(bool){ bytes memory data = abi.encode(rewarded_token); (bool success,) = _gauge.call(data); return success; } function IsV2(address _gauge) private returns(bool){ bytes memory data = abi.encodeWithSelector(reward_tokens,uint256(0)); (bool success,) = _gauge.call(data); return success; } function IsV3(address _gauge) private returns(bool){ bytes memory data = abi.encodeWithSelector(rewards_receiver,address(0)); (bool success,) = _gauge.call(data); return success; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; interface IProxyFactory { function clone(address _target) external returns(address); }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; /** * @title RewardHook * @author ConvexFinance * @notice Example Reward hook for stash * @dev ExtraRewardStash contracts call this hook if it is set. This hook * can be used to pull rewards during a claim. For example pulling * rewards from master chef. */ contract RewardHook{ using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public immutable stash; address public immutable rewardToken; /** * @param _stash Address of the reward stash * @param _reward Reward token */ constructor(address _stash, address _reward) public { stash = _stash; rewardToken = _reward; } /** * @dev Called when claimRewards is called in ExtraRewardStash can implement * logic to pull rewards i.e from a master chef contract. This is just an example * and assumes rewards are just sent directly to this hook contract */ function onRewardClaim() external{ //get balance uint256 bal = IERC20(rewardToken).balanceOf(address(this)); //send IERC20(rewardToken).safeTransfer(stash,bal); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; /** * @dev Standard math utilities missing in the Solidity language. */ library MathUtil { /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; /** *Submitted for verification at Etherscan.io on 2020-07-17 */ /* ____ __ __ __ _ / __/__ __ ___ / /_ / / ___ / /_ (_)__ __ _\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ / /___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\ /___/ * Synthetix: BaseRewardPool.sol * * Docs: https://docs.synthetix.io/ * * * MIT License * =========== * * Copyright (c) 2020 Synthetix * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */ import "./Interfaces.sol"; import "./interfaces/MathUtil.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title BaseRewardPool * @author Synthetix -> ConvexFinance * @notice Unipool rewards contract that is re-deployed from rFactory for each staking pool. * @dev Changes made here by ConvexFinance are to do with the delayed reward allocation. Curve is queued for * rewards and the distribution only begins once the new rewards are sufficiently large, or the epoch * has ended. Additionally, enables hooks for `extraRewards` that can be enabled at any point to * distribute a child reward token (i.e. a secondary one from Curve, or a seperate one). */ contract BaseRewardPool { using SafeMath for uint256; using SafeERC20 for IERC20; IERC20 public immutable rewardToken; IERC20 public immutable stakingToken; uint256 public constant duration = 7 days; address public immutable operator; address public immutable rewardManager; uint256 public immutable pid; uint256 public periodFinish = 0; uint256 public rewardRate = 0; uint256 public lastUpdateTime; uint256 public rewardPerTokenStored; uint256 public queuedRewards = 0; uint256 public currentRewards = 0; uint256 public historicalRewards = 0; uint256 public constant newRewardRatio = 830; uint256 private _totalSupply; mapping(address => uint256) public userRewardPerTokenPaid; mapping(address => uint256) public rewards; mapping(address => uint256) private _balances; address[] public extraRewards; event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Withdrawn(address indexed user, uint256 amount); event RewardPaid(address indexed user, uint256 reward); /** * @dev This is called directly from RewardFactory * @param pid_ Effectively the pool identifier - used in the Booster * @param stakingToken_ Pool LP token * @param rewardToken_ Crv * @param operator_ Booster * @param rewardManager_ RewardFactory */ constructor( uint256 pid_, address stakingToken_, address rewardToken_, address operator_, address rewardManager_ ) public { pid = pid_; stakingToken = IERC20(stakingToken_); rewardToken = IERC20(rewardToken_); operator = operator_; rewardManager = rewardManager_; } function totalSupply() public view virtual returns (uint256) { return _totalSupply; } function balanceOf(address account) public view virtual returns (uint256) { return _balances[account]; } function extraRewardsLength() external view returns (uint256) { return extraRewards.length; } function addExtraReward(address _reward) external returns(bool){ require(msg.sender == rewardManager, "!authorized"); require(_reward != address(0),"!reward setting"); if(extraRewards.length >= 12){ return false; } extraRewards.push(_reward); return true; } function clearExtraRewards() external{ require(msg.sender == rewardManager, "!authorized"); delete extraRewards; } modifier updateReward(address account) { rewardPerTokenStored = rewardPerToken(); lastUpdateTime = lastTimeRewardApplicable(); if (account != address(0)) { rewards[account] = earned(account); userRewardPerTokenPaid[account] = rewardPerTokenStored; } _; } function lastTimeRewardApplicable() public view returns (uint256) { return MathUtil.min(block.timestamp, periodFinish); } function rewardPerToken() public view returns (uint256) { if (totalSupply() == 0) { return rewardPerTokenStored; } return rewardPerTokenStored.add( lastTimeRewardApplicable() .sub(lastUpdateTime) .mul(rewardRate) .mul(1e18) .div(totalSupply()) ); } function earned(address account) public view returns (uint256) { return balanceOf(account) .mul(rewardPerToken().sub(userRewardPerTokenPaid[account])) .div(1e18) .add(rewards[account]); } function stake(uint256 _amount) public returns(bool) { _processStake(_amount, msg.sender); stakingToken.safeTransferFrom(msg.sender, address(this), _amount); emit Staked(msg.sender, _amount); return true; } function stakeAll() external returns(bool){ uint256 balance = stakingToken.balanceOf(msg.sender); stake(balance); return true; } function stakeFor(address _for, uint256 _amount) public returns(bool) { _processStake(_amount, _for); //take away from sender stakingToken.safeTransferFrom(msg.sender, address(this), _amount); emit Staked(_for, _amount); return true; } /** * @dev Generic internal staking function that basically does 3 things: update rewards based * on previous balance, trigger also on any child contracts, then update balances. * @param _amount Units to add to the users balance * @param _receiver Address of user who will receive the stake */ function _processStake(uint256 _amount, address _receiver) internal updateReward(_receiver) { require(_amount > 0, 'RewardPool : Cannot stake 0'); //also stake to linked rewards for(uint i=0; i < extraRewards.length; i++){ IRewards(extraRewards[i]).stake(_receiver, _amount); } _totalSupply = _totalSupply.add(_amount); _balances[_receiver] = _balances[_receiver].add(_amount); } function withdraw(uint256 amount, bool claim) public updateReward(msg.sender) returns(bool) { require(amount > 0, 'RewardPool : Cannot withdraw 0'); //also withdraw from linked rewards for(uint i=0; i < extraRewards.length; i++){ IRewards(extraRewards[i]).withdraw(msg.sender, amount); } _totalSupply = _totalSupply.sub(amount); _balances[msg.sender] = _balances[msg.sender].sub(amount); stakingToken.safeTransfer(msg.sender, amount); emit Withdrawn(msg.sender, amount); if(claim){ getReward(msg.sender,true); } return true; } function withdrawAll(bool claim) external{ withdraw(_balances[msg.sender],claim); } function withdrawAndUnwrap(uint256 amount, bool claim) public returns(bool){ _withdrawAndUnwrapTo(amount, msg.sender, msg.sender); //get rewards too if(claim){ getReward(msg.sender,true); } return true; } function _withdrawAndUnwrapTo(uint256 amount, address from, address receiver) internal updateReward(from) returns(bool){ //also withdraw from linked rewards for(uint i=0; i < extraRewards.length; i++){ IRewards(extraRewards[i]).withdraw(from, amount); } _totalSupply = _totalSupply.sub(amount); _balances[from] = _balances[from].sub(amount); //tell operator to withdraw from here directly to user IDeposit(operator).withdrawTo(pid,amount,receiver); emit Withdrawn(from, amount); return true; } function withdrawAllAndUnwrap(bool claim) external{ withdrawAndUnwrap(_balances[msg.sender],claim); } /** * @dev Gives a staker their rewards, with the option of claiming extra rewards * @param _account Account for which to claim * @param _claimExtras Get the child rewards too? */ function getReward(address _account, bool _claimExtras) public updateReward(_account) returns(bool){ uint256 reward = earned(_account); if (reward > 0) { rewards[_account] = 0; rewardToken.safeTransfer(_account, reward); IDeposit(operator).rewardClaimed(pid, _account, reward); emit RewardPaid(_account, reward); } //also get rewards from linked rewards if(_claimExtras){ for(uint i=0; i < extraRewards.length; i++){ IRewards(extraRewards[i]).getReward(_account); } } return true; } /** * @dev Called by a staker to get their allocated rewards */ function getReward() external returns(bool){ getReward(msg.sender,true); return true; } /** * @dev Donate some extra rewards to this contract */ function donate(uint256 _amount) external returns(bool){ IERC20(rewardToken).safeTransferFrom(msg.sender, address(this), _amount); queuedRewards = queuedRewards.add(_amount); } /** * @dev Processes queued rewards in isolation, providing the period has finished. * This allows a cheaper way to trigger rewards on low value pools. */ function processIdleRewards() external { if (block.timestamp >= periodFinish && queuedRewards > 0) { notifyRewardAmount(queuedRewards); queuedRewards = 0; } } /** * @dev Called by the booster to allocate new Crv rewards to this pool * Curve is queued for rewards and the distribution only begins once the new rewards are sufficiently * large, or the epoch has ended. */ function queueNewRewards(uint256 _rewards) external returns(bool){ require(msg.sender == operator, "!authorized"); _rewards = _rewards.add(queuedRewards); if (block.timestamp >= periodFinish) { notifyRewardAmount(_rewards); queuedRewards = 0; return true; } //et = now - (finish-duration) uint256 elapsedTime = block.timestamp.sub(periodFinish.sub(duration)); //current at now: rewardRate * elapsedTime uint256 currentAtNow = rewardRate * elapsedTime; uint256 queuedRatio = currentAtNow.mul(1000).div(_rewards); //uint256 queuedRatio = currentRewards.mul(1000).div(_rewards); if(queuedRatio < newRewardRatio){ notifyRewardAmount(_rewards); queuedRewards = 0; }else{ queuedRewards = _rewards; } return true; } function notifyRewardAmount(uint256 reward) internal updateReward(address(0)) { historicalRewards = historicalRewards.add(reward); if (block.timestamp >= periodFinish) { rewardRate = reward.div(duration); } else { uint256 remaining = periodFinish.sub(block.timestamp); uint256 leftover = remaining.mul(rewardRate); reward = reward.add(leftover); rewardRate = reward.div(duration); } currentRewards = reward; lastUpdateTime = block.timestamp; periodFinish = block.timestamp.add(duration); emit RewardAdded(reward); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import { BaseRewardPool, IDeposit } from "./BaseRewardPool.sol"; import { IERC4626, IERC20Metadata } from "./interfaces/IERC4626.sol"; import { IERC20 } from "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import { ReentrancyGuard } from "@openzeppelin/contracts-0.6/utils/ReentrancyGuard.sol"; import { SafeERC20 } from "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title BaseRewardPool4626 * @notice Simply wraps the BaseRewardPool with the new IERC4626 Vault standard functions. * @dev See https://github.com/fei-protocol/ERC4626/blob/main/src/interfaces/IERC4626.sol#L58 * This is not so much a vault as a Reward Pool, therefore asset:share ratio is always 1:1. * To create most utility for this RewardPool, the "asset" has been made to be the crvLP token, * as opposed to the cvxLP token. Therefore, users can easily deposit crvLP, and it will first * go to the Booster and mint the cvxLP before performing the normal staking function. */ contract BaseRewardPool4626 is BaseRewardPool, ReentrancyGuard, IERC4626 { using SafeERC20 for IERC20; /** * @notice The address of the underlying ERC20 token used for * the Vault for accounting, depositing, and withdrawing. */ address public override asset; mapping (address => mapping (address => uint256)) private _allowances; /** * @dev See BaseRewardPool.sol */ constructor( uint256 pid_, address stakingToken_, address rewardToken_, address operator_, address rewardManager_, address lptoken_ ) public BaseRewardPool(pid_, stakingToken_, rewardToken_, operator_, rewardManager_) { asset = lptoken_; IERC20(asset).safeApprove(operator_, type(uint256).max); } /** * @notice Total amount of the underlying asset that is "managed" by Vault. */ function totalAssets() external view virtual override returns(uint256){ return totalSupply(); } /** * @notice Mints `shares` Vault shares to `receiver`. * @dev Because `asset` is not actually what is collected here, first wrap to required token in the booster. */ function deposit(uint256 assets, address receiver) public virtual override nonReentrant returns (uint256) { // Transfer "asset" (crvLP) from sender IERC20(asset).safeTransferFrom(msg.sender, address(this), assets); // Convert crvLP to cvxLP through normal booster deposit process, but don't stake uint256 balBefore = stakingToken.balanceOf(address(this)); IDeposit(operator).deposit(pid, assets, false); uint256 balAfter = stakingToken.balanceOf(address(this)); require(balAfter.sub(balBefore) >= assets, "!deposit"); // Perform stake manually, now that the funds have been received _processStake(assets, receiver); emit Deposit(msg.sender, receiver, assets, assets); emit Staked(receiver, assets); return assets; } /** * @notice Mints exactly `shares` Vault shares to `receiver` * by depositing `assets` of underlying tokens. */ function mint(uint256 shares, address receiver) external virtual override returns (uint256) { return deposit(shares, receiver); } /** * @notice Redeems `shares` from `owner` and sends `assets` * of underlying tokens to `receiver`. */ function withdraw( uint256 assets, address receiver, address owner ) public virtual override nonReentrant returns (uint256) { if (msg.sender != owner) { _approve(owner, msg.sender, _allowances[owner][msg.sender].sub(assets, "ERC4626: withdrawal amount exceeds allowance")); } _withdrawAndUnwrapTo(assets, owner, receiver); emit Withdraw(msg.sender, receiver, owner, assets, assets); return assets; } /** * @notice Redeems `shares` from `owner` and sends `assets` * of underlying tokens to `receiver`. */ function redeem( uint256 shares, address receiver, address owner ) external virtual override returns (uint256) { return withdraw(shares, receiver, owner); } /** * @notice The amount of shares that the vault would * exchange for the amount of assets provided, in an * ideal scenario where all the conditions are met. */ function convertToShares(uint256 assets) public view virtual override returns (uint256) { return assets; } /** * @notice The amount of assets that the vault would * exchange for the amount of shares provided, in an * ideal scenario where all the conditions are met. */ function convertToAssets(uint256 shares) public view virtual override returns (uint256) { return shares; } /** * @notice Total number of underlying assets that can * be deposited by `owner` into the Vault, where `owner` * corresponds to the input parameter `receiver` of a * `deposit` call. */ function maxDeposit(address /* owner */) public view virtual override returns (uint256) { return type(uint256).max; } /** * @notice Allows an on-chain or off-chain user to simulate * the effects of their deposit at the current block, given * current on-chain conditions. */ function previewDeposit(uint256 assets) external view virtual override returns(uint256){ return convertToShares(assets); } /** * @notice Total number of underlying shares that can be minted * for `owner`, where `owner` corresponds to the input * parameter `receiver` of a `mint` call. */ function maxMint(address owner) external view virtual override returns (uint256) { return maxDeposit(owner); } /** * @notice Allows an on-chain or off-chain user to simulate * the effects of their mint at the current block, given * current on-chain conditions. */ function previewMint(uint256 shares) external view virtual override returns(uint256){ return convertToAssets(shares); } /** * @notice Total number of underlying assets that can be * withdrawn from the Vault by `owner`, where `owner` * corresponds to the input parameter of a `withdraw` call. */ function maxWithdraw(address owner) public view virtual override returns (uint256) { return balanceOf(owner); } /** * @notice Allows an on-chain or off-chain user to simulate * the effects of their withdrawal at the current block, * given current on-chain conditions. */ function previewWithdraw(uint256 assets) public view virtual override returns(uint256 shares){ return convertToShares(assets); } /** * @notice Total number of underlying shares that can be * redeemed from the Vault by `owner`, where `owner` corresponds * to the input parameter of a `redeem` call. */ function maxRedeem(address owner) external view virtual override returns (uint256) { return maxWithdraw(owner); } /** * @notice Allows an on-chain or off-chain user to simulate * the effects of their redeemption at the current block, * given current on-chain conditions. */ function previewRedeem(uint256 shares) external view virtual override returns(uint256){ return previewWithdraw(shares); } /* ========== IERC20 ========== */ /** * @dev Returns the name of the token. */ function name() external view override returns (string memory) { return string( abi.encodePacked(IERC20Metadata(address(stakingToken)).name(), " Vault") ); } /** * @dev Returns the symbol of the token. */ function symbol() external view override returns (string memory) { return string( abi.encodePacked(IERC20Metadata(address(stakingToken)).symbol(), "-vault") ); } /** * @dev Returns the decimals places of the token. */ function decimals() external view override returns (uint8) { return 18; } /** * @dev Returns the amount of tokens in existence. */ function totalSupply() public view override(BaseRewardPool, IERC20) returns (uint256) { return BaseRewardPool.totalSupply(); } /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) public view override(BaseRewardPool, IERC20) returns (uint256) { return BaseRewardPool.balanceOf(account); } /** * @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 override returns (bool) { revert("ERC4626: Not supported"); } /** * @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(msg.sender, spender, amount); return true; } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC4626: approve from the zero address"); require(spender != address(0), "ERC4626: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. */ function transferFrom(address /* sender */, address /* recipient */, uint256 /* amount */) external override returns (bool) { revert("ERC4626: Not supported"); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import { IERC20Metadata } from "./IERC20Metadata.sol"; /// @title ERC4626 interface /// See: https://eips.ethereum.org/EIPS/eip-4626 abstract contract IERC4626 is IERC20Metadata { /*//////////////////////////////////////////////////////// Events ////////////////////////////////////////////////////////*/ /// @notice `caller` has exchanged `assets` for `shares`, and transferred those `shares` to `owner` event Deposit( address indexed caller, address indexed owner, uint256 assets, uint256 shares ); /// @notice `caller` has exchanged `shares`, owned by `owner`, for /// `assets`, and transferred those `assets` to `receiver`. event Withdraw( address indexed caller, address indexed receiver, address indexed owner, uint256 assets, uint256 shares ); /*//////////////////////////////////////////////////////// Vault properties ////////////////////////////////////////////////////////*/ /// @notice The address of the underlying ERC20 token used for /// the Vault for accounting, depositing, and withdrawing. function asset() external view virtual returns(address); /// @notice Total amount of the underlying asset that /// is "managed" by Vault. function totalAssets() external view virtual returns(uint256); /*//////////////////////////////////////////////////////// Deposit/Withdrawal Logic ////////////////////////////////////////////////////////*/ /// @notice Mints `shares` Vault shares to `receiver` by /// depositing exactly `assets` of underlying tokens. function deposit(uint256 assets, address receiver) external virtual returns(uint256 shares); /// @notice Mints exactly `shares` Vault shares to `receiver` /// by depositing `assets` of underlying tokens. function mint(uint256 shares, address receiver) external virtual returns(uint256 assets); /// @notice Redeems `shares` from `owner` and sends `assets` /// of underlying tokens to `receiver`. function withdraw(uint256 assets, address receiver, address owner) external virtual returns(uint256 shares); /// @notice Redeems `shares` from `owner` and sends `assets` /// of underlying tokens to `receiver`. function redeem(uint256 shares, address receiver, address owner) external virtual returns(uint256 assets); /*//////////////////////////////////////////////////////// Vault Accounting Logic ////////////////////////////////////////////////////////*/ /// @notice The amount of shares that the vault would /// exchange for the amount of assets provided, in an /// ideal scenario where all the conditions are met. function convertToShares(uint256 assets) external view virtual returns(uint256 shares); /// @notice The amount of assets that the vault would /// exchange for the amount of shares provided, in an /// ideal scenario where all the conditions are met. function convertToAssets(uint256 shares) external view virtual returns(uint256 assets); /// @notice Total number of underlying assets that can /// be deposited by `owner` into the Vault, where `owner` /// corresponds to the input parameter `receiver` of a /// `deposit` call. function maxDeposit(address owner) external view virtual returns(uint256 maxAssets); /// @notice Allows an on-chain or off-chain user to simulate /// the effects of their deposit at the current block, given /// current on-chain conditions. function previewDeposit(uint256 assets) external view virtual returns(uint256 shares); /// @notice Total number of underlying shares that can be minted /// for `owner`, where `owner` corresponds to the input /// parameter `receiver` of a `mint` call. function maxMint(address owner) external view virtual returns(uint256 maxShares); /// @notice Allows an on-chain or off-chain user to simulate /// the effects of their mint at the current block, given /// current on-chain conditions. function previewMint(uint256 shares) external view virtual returns(uint256 assets); /// @notice Total number of underlying assets that can be /// withdrawn from the Vault by `owner`, where `owner` /// corresponds to the input parameter of a `withdraw` call. function maxWithdraw(address owner) external view virtual returns(uint256 maxAssets); /// @notice Allows an on-chain or off-chain user to simulate /// the effects of their withdrawal at the current block, /// given current on-chain conditions. function previewWithdraw(uint256 assets) external view virtual returns(uint256 shares); /// @notice Total number of underlying shares that can be /// redeemed from the Vault by `owner`, where `owner` corresponds /// to the input parameter of a `redeem` call. function maxRedeem(address owner) external view virtual returns(uint256 maxShares); /// @notice Allows an on-chain or off-chain user to simulate /// the effects of their redeemption at the current block, /// given current on-chain conditions. function previewRedeem(uint256 shares) external view virtual returns(uint256 assets); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <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 () internal { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import { IERC20 } from "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "./BaseRewardPool4626.sol"; import "./VirtualBalanceRewardPool.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title RewardFactory * @author ConvexFinance * @notice Used to deploy reward pools when a new pool is added to the Booster * contract. This contract deploys two types of reward pools: * - BaseRewardPool handles CRV rewards for guages * - VirtualBalanceRewardPool for extra rewards */ contract RewardFactory { using Address for address; address public immutable operator; address public immutable crv; mapping (address => bool) private rewardAccess; mapping(address => uint256[]) public rewardActiveList; event RewardPoolCreated(address rewardPool, uint256 _pid, address depositToken); event TokenRewardPoolCreated(address rewardPool, address token, address mainRewards, address operator); event AccessChanged(address stash, bool hasAccess); /** * @param _operator Contract operator is Booster * @param _crv CRV token address */ constructor(address _operator, address _crv) public { operator = _operator; crv = _crv; } //stash contracts need access to create new Virtual balance pools for extra gauge incentives(ex. snx) function setAccess(address _stash, bool _status) external{ require(msg.sender == operator, "!auth"); rewardAccess[_stash] = _status; emit AccessChanged(_stash, _status); } /** * @notice Create a Managed Reward Pool to handle distribution of all crv mined in a pool */ function CreateCrvRewards(uint256 _pid, address _depositToken, address _lptoken) external returns (address) { require(msg.sender == operator, "!auth"); //operator = booster(deposit) contract so that new crv can be added and distributed //reward manager = this factory so that extra incentive tokens(ex. snx) can be linked to the main managed reward pool BaseRewardPool4626 rewardPool = new BaseRewardPool4626(_pid,_depositToken,crv,operator, address(this), _lptoken); emit RewardPoolCreated(address(rewardPool), _pid, _depositToken); return address(rewardPool); } /** * @notice Create a virtual balance reward pool that mimics the balance of a pool's main reward contract * used for extra incentive tokens(ex. snx) as well as vecrv fees */ function CreateTokenRewards(address _token, address _mainRewards, address _operator) external returns (address) { require(msg.sender == operator || rewardAccess[msg.sender] == true, "!auth"); //create new pool, use main pool for balance lookup VirtualBalanceRewardPool rewardPool = new VirtualBalanceRewardPool(_mainRewards,_token,_operator); address rAddress = address(rewardPool); //add the new pool to main pool's list of extra rewards, assuming this factory has "reward manager" role IRewards(_mainRewards).addExtraReward(rAddress); emit TokenRewardPoolCreated(rAddress, _token, _mainRewards, _operator); //return new pool's address return rAddress; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "./interfaces/IGaugeController.sol"; /** * @title PoolManagerV3 * @author ConvexFinance * @notice Pool Manager v3 * PoolManagerV3 calls addPool on PoolManagerShutdownProxy which calls * addPool on PoolManagerProxy which calls addPool on Booster. * PoolManager-ception * @dev Add pools to the Booster contract */ contract PoolManagerV3{ address public immutable pools; address public immutable gaugeController; address public operator; bool public protectAddPool; /** * @param _pools Currently PoolManagerSecondaryProxy * @param _gaugeController Curve gauge controller e.g: (0x2F50D538606Fa9EDD2B11E2446BEb18C9D5846bB) * @param _operator Convex multisig */ constructor( address _pools, address _gaugeController, address _operator ) public { pools = _pools; gaugeController = _gaugeController; operator = _operator; protectAddPool = true; } function setOperator(address _operator) external { require(msg.sender == operator, "!auth"); operator = _operator; } /** * @notice set if addPool is only callable by operator */ function setProtectPool(bool _protectAddPool) external { require(msg.sender == operator, "!auth"); protectAddPool = _protectAddPool; } /** * @notice Add a new curve pool to the system. (default stash to v3) */ function addPool(address _gauge) external returns(bool){ _addPool(_gauge,3); return true; } /** * @notice Add a new curve pool to the system */ function addPool(address _gauge, uint256 _stashVersion) external returns(bool){ _addPool(_gauge,_stashVersion); return true; } function _addPool(address _gauge, uint256 _stashVersion) internal{ if(protectAddPool) { require(msg.sender == operator, "!auth"); } //get lp token from gauge address lptoken = ICurveGauge(_gauge).lp_token(); //gauge/lptoken address checks will happen in the next call IPools(pools).addPool(lptoken,_gauge,_stashVersion); } function forceAddPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool){ require(msg.sender==operator, "!auth"); //force add pool without weight checks (can only be used on new token and gauge addresses) return IPools(pools).forceAddPool(_lptoken, _gauge, _stashVersion); } function shutdownPool(uint256 _pid) external returns(bool){ require(msg.sender==operator, "!auth"); IPools(pools).shutdownPool(_pid); return true; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; interface IGaugeController { function get_gauge_weight(address _gauge) external view returns(uint256); function vote_user_slopes(address,address) external view returns(uint256,uint256,uint256);//slope,power,end function vote_for_gauge_weights(address,uint256) external; function add_gauge(address,int128,uint256) external; }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "./interfaces/IGaugeController.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; /** * @title PoolManagerSecondaryProxy * @author ConvexFinance * @notice Basically a PoolManager that has a better shutdown and calls addPool on PoolManagerProxy. * Immutable pool manager proxy to enforce that when a pool is shutdown, the proper number * of lp tokens are returned to the booster contract for withdrawal. */ contract PoolManagerSecondaryProxy{ using SafeMath for uint256; address public immutable gaugeController; address public immutable pools; address public immutable booster; address public owner; address public operator; bool public isShutdown; mapping(address => bool) public usedMap; /** * @param _gaugeController Curve Gauge controller (0x2F50D538606Fa9EDD2B11E2446BEb18C9D5846bB) * @param _pools PoolManagerProxy (0x5F47010F230cE1568BeA53a06eBAF528D05c5c1B) * @param _booster Booster * @param _owner Executoor */ constructor( address _gaugeController, address _pools, address _booster, address _owner ) public { gaugeController = _gaugeController; pools = _pools; booster = _booster; owner = _owner; operator = msg.sender; } modifier onlyOwner() { require(owner == msg.sender, "!owner"); _; } modifier onlyOperator() { require(operator == msg.sender, "!op"); _; } //set owner - only OWNER function setOwner(address _owner) external onlyOwner{ owner = _owner; } //set operator - only OWNER function setOperator(address _operator) external onlyOwner{ operator = _operator; } //manual set an address to used state function setUsedAddress(address[] memory usedList) external onlyOwner{ for(uint i=0; i < usedList.length; i++){ usedMap[usedList[i]] = true; } } //shutdown pool management and disallow new pools. change is immutable function shutdownSystem() external onlyOwner{ isShutdown = true; } /** * @notice Shutdown a pool - only OPERATOR * @dev Shutdowns a pool and ensures all the LP tokens are properly * withdrawn to the Booster contract */ function shutdownPool(uint256 _pid) external onlyOperator returns(bool){ //get pool info (address lptoken, address depositToken,,,,bool isshutdown) = IPools(booster).poolInfo(_pid); require(!isshutdown, "already shutdown"); //shutdown pool and get before and after amounts uint256 beforeBalance = IERC20(lptoken).balanceOf(booster); IPools(pools).shutdownPool(_pid); uint256 afterBalance = IERC20(lptoken).balanceOf(booster); //check that proper amount of tokens were withdrawn(will also fail if already shutdown) require( afterBalance.sub(beforeBalance) >= IERC20(depositToken).totalSupply(), "supply mismatch"); return true; } //add a new pool if it has weight on the gauge controller - only OPERATOR function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external onlyOperator returns(bool){ //check that the pool as weight uint256 weight = IGaugeController(gaugeController).get_gauge_weight(_gauge); require(weight > 0, "must have weight"); return _addPool(_lptoken, _gauge, _stashVersion); } //force add a new pool, but only for addresses that have never been used before - only OPERATOR function forceAddPool(address _lptoken, address _gauge, uint256 _stashVersion) external onlyOperator returns(bool){ require(!usedMap[_lptoken] && !usedMap[_gauge], "cant force used pool"); return _addPool(_lptoken, _gauge, _stashVersion); } //internal add pool and updated used list function _addPool(address _lptoken, address _gauge, uint256 _stashVersion) internal returns(bool){ require(!isShutdown, "shutdown"); usedMap[_lptoken] = true; usedMap[_gauge] = true; return IPools(pools).addPool(_lptoken,_gauge,_stashVersion); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; /** * @title PoolManagerProxy * @author ConvexFinance * @notice Immutable pool manager proxy to enforce that there are no multiple pools of the same gauge * as well as new lp tokens are not gauge tokens * @dev Called by PoolManagerShutdownProxy */ contract PoolManagerProxy{ address public immutable pools; address public owner; address public operator; /** * @param _pools Contract can call addPool currently Booster * @param _owner Contract owner currently multisig */ constructor( address _pools, address _owner ) public { pools = _pools; owner = _owner; operator = msg.sender; } modifier onlyOwner() { require(owner == msg.sender, "!owner"); _; } modifier onlyOperator() { require(operator == msg.sender, "!op"); _; } //set owner - only OWNER function setOwner(address _owner) external onlyOwner{ owner = _owner; } //set operator - only OWNER function setOperator(address _operator) external onlyOwner{ operator = _operator; } // sealed to be immutable // function revertControl() external{ // } //shutdown a pool - only OPERATOR function shutdownPool(uint256 _pid) external onlyOperator returns(bool){ return IPools(pools).shutdownPool(_pid); } /** * @notice Add pool to system * @dev Only callable by the operator looks up the gauge from the gaugeMap in Booster to ensure * it hasn't already been added */ function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external onlyOperator returns(bool){ require(_gauge != address(0),"gauge is 0"); require(_lptoken != address(0),"lp token is 0"); //check if a pool with this gauge already exists bool gaugeExists = IPools(pools).gaugeMap(_gauge); require(!gaugeExists, "already registered gauge"); //must also check that the lp token is not a registered gauge //because curve gauges are tokenized gaugeExists = IPools(pools).gaugeMap(_lptoken); require(!gaugeExists, "already registered lptoken"); return IPools(pools).addPool(_lptoken,_gauge,_stashVersion); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "./interfaces/IRewardHook.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title ExtraRewardStashV3 * @author ConvexFinance * @notice ExtraRewardStash for pools added to the Booster to handle extra rewards * that aren't CRV that can be claimed from a gauge. * - v3.0: Support for curve gauge reward redirect * The Booster contract has a function called setGaugeRedirect. This function calls set_rewards_receiver * On the Curve Guage. This tells the Gauge where to send rewards. The Booster crafts the calldata for this * transaction and then calls execute on the VoterProxy which executes this transaction on the Curve Gauge * - v3.1: Support for arbitrary token rewards outside of gauge rewards add * reward hook to pull rewards during claims * - v3.2: Move constuctor to init function for proxy creation */ contract ExtraRewardStashV3 { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public immutable crv; uint256 private constant maxRewards = 8; uint256 public pid; address public operator; address public staker; address public gauge; address public rewardFactory; mapping(address => uint256) public historicalRewards; bool public hasRedirected; bool public hasCurveRewards; struct TokenInfo { address token; address rewardAddress; } //use mapping+array so that we dont have to loop check each time setToken is called mapping(address => TokenInfo) public tokenInfo; address[] public tokenList; //address to call for reward pulls address public rewardHook; /** * @param _crv CRV token address */ constructor(address _crv) public { crv = _crv; } /** * @param _pid Pool ID * @param _operator Operator (Booster) * @param _staker Staker (VoterProxy) * @param _gauge Gauge * @param _rFactory Reward factory */ function initialize(uint256 _pid, address _operator, address _staker, address _gauge, address _rFactory) external { require(gauge == address(0),"!init"); pid = _pid; operator = _operator; staker = _staker; gauge = _gauge; rewardFactory = _rFactory; } function getName() external pure returns (string memory) { return "ExtraRewardStashV3.2"; } function tokenCount() external view returns (uint256){ return tokenList.length; } /** * @notice Claim rewards from the gauge * @dev The Stash's claimRewards function calls claimRewards on the Booster contract * which calls claimRewards on the VoterProxy which calls claim_rewards on the gauge * If a RewardHook is set onRewardClaim is also called on that * Called by Booster earmarkRewards * Guage rewards are sent directly to this stash even though the Curve method claim_rewards * is being called by the VoterProxy. This is because Curves guages have the ability to redirect * rewards to somewhere other than msg.sender. This is setup in Booster setGaugeRedirect */ function claimRewards() external returns (bool) { require(msg.sender == operator, "!operator"); //this is updateable from v2 gauges now so must check each time. checkForNewRewardTokens(); //make sure we're redirected if(!hasRedirected){ IDeposit(operator).setGaugeRedirect(pid); hasRedirected = true; } if(hasCurveRewards){ //claim rewards on gauge for staker //using reward_receiver so all rewards will be moved to this stash IDeposit(operator).claimRewards(pid,gauge); } //hook for reward pulls if(rewardHook != address(0)){ try IRewardHook(rewardHook).onRewardClaim(){ }catch{} } return true; } //check if gauge rewards have changed function checkForNewRewardTokens() internal { for(uint256 i = 0; i < maxRewards; i++){ address token = ICurveGauge(gauge).reward_tokens(i); if (token == address(0)) { break; } if(!hasCurveRewards){ hasCurveRewards = true; } setToken(token); } } //register an extra reward token to be handled // (any new incentive that is not directly on curve gauges) function setExtraReward(address _token) external{ //owner of booster can set extra rewards require(IDeposit(operator).owner() == msg.sender, "!owner"); require(tokenList.length < 4, "too many rewards"); setToken(_token); } function setRewardHook(address _hook) external{ //owner of booster can set reward hook require(IDeposit(operator).owner() == msg.sender, "!owner"); rewardHook = _hook; } /** * @notice Add a reward token to the token list so it can be claimed * @dev For each token that is added as a claimable reward a VirtualRewardsPool * is deployed to handle virtual distribution of tokens */ function setToken(address _token) internal { TokenInfo storage t = tokenInfo[_token]; if(t.token == address(0)){ //set token address t.token = _token; //check if crv if(_token != crv){ //create new reward contract (for NON-crv tokens only) (,,,address mainRewardContract,,) = IDeposit(operator).poolInfo(pid); address rewardContract = IRewardFactory(rewardFactory).CreateTokenRewards( _token, mainRewardContract, address(this)); t.rewardAddress = rewardContract; } //add token to list of known rewards tokenList.push(_token); } } //pull assigned tokens from staker to stash function stashRewards() external pure returns(bool){ //after depositing/withdrawing, extra incentive tokens are claimed //but from v3 this is default to off, and this stash is the reward receiver too. return true; } /** * @notice Distribute rewards * @dev Send all CRV to the Booster contract and send all extra token * rewards to the rewardContract VirtualRewardsPool * Called by Booster earmarkRewards */ function processStash() external returns(bool){ require(msg.sender == operator, "!operator"); uint256 tCount = tokenList.length; for(uint i=0; i < tCount; i++){ TokenInfo storage t = tokenInfo[tokenList[i]]; address token = t.token; if(token == address(0)) continue; uint256 amount = IERC20(token).balanceOf(address(this)); if (amount > 0) { historicalRewards[token] = historicalRewards[token].add(amount); if(token == crv){ //if crv, send back to booster to distribute IERC20(token).safeTransfer(operator, amount); continue; } //add to reward contract address rewards = t.rewardAddress; if(rewards == address(0)) continue; IERC20(token).safeTransfer(rewards, amount); IRewards(rewards).queueNewRewards(amount); } } return true; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; interface IRewardHook { function onRewardClaim() external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <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 () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { 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 { emit OwnershipTransferred(_owner, address(0)); _owner = 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"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import { ReentrancyGuard } from "@openzeppelin/contracts-0.6/utils/ReentrancyGuard.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Context.sol"; import "@openzeppelin/contracts-0.6/access/Ownable.sol"; import "./interfaces/IRewarder.sol"; /** * @title ConvexMasterChef * @author ConvexFinance * @notice Masterchef can distribute rewards to n pools over x time * @dev There are some caveats with this usage - once it's turned on it can't be turned off, * and thus it can over complicate the distribution of these rewards. * To kick things off, just transfer CVX here and add some pools - rewards will be distributed * pro-rata based on the allocation points in each pool vs the total alloc. */ contract ConvexMasterChef is Ownable, ReentrancyGuard { using SafeMath for uint256; using SafeERC20 for IERC20; // Info of each user. struct UserInfo { uint256 amount; // How many LP tokens the user has provided. uint256 rewardDebt; // Reward debt. See explanation below. // // We do some fancy math here. Basically, any point in time, the amount of CVXs // entitled to a user but is pending to be distributed is: // // pending reward = (user.amount * pool.accCvxPerShare) - user.rewardDebt // // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens: // 1. The pool's `accCvxPerShare` (and `lastRewardBlock`) gets updated. // 2. User receives the pending reward sent to his/her address. // 3. User's `amount` gets updated. // 4. User's `rewardDebt` gets updated. } // Info of each pool. struct PoolInfo { IERC20 lpToken; // Address of LP token contract. uint256 allocPoint; // How many allocation points assigned to this pool. CVX to distribute per block. uint256 lastRewardBlock; // Last block number that CVXs distribution occurs. uint256 accCvxPerShare; // Accumulated CVXs per share, times 1e12. See below. IRewarder rewarder; } //cvx IERC20 public immutable cvx; // CVX tokens created per block. uint256 public immutable rewardPerBlock; // Bonus muliplier for early cvx makers. uint256 public constant BONUS_MULTIPLIER = 2; // Info of each pool. PoolInfo[] public poolInfo; mapping(address => bool) public isAddedPool; // Info of each user that stakes LP tokens. mapping(uint256 => mapping(address => UserInfo)) public userInfo; // Total allocation points. Must be the sum of all allocation points in all pools. uint256 public totalAllocPoint = 0; // The block number when CVX mining starts. uint256 public immutable startBlock; uint256 public immutable endBlock; // Events event Deposit(address indexed user, uint256 indexed pid, uint256 amount); event Withdraw(address indexed user, uint256 indexed pid, uint256 amount); event RewardPaid(address indexed user, uint256 indexed pid, uint256 amount); event EmergencyWithdraw( address indexed user, uint256 indexed pid, uint256 amount ); constructor( IERC20 _cvx, uint256 _rewardPerBlock, uint256 _startBlock, uint256 _endBlock ) public { cvx = _cvx; isAddedPool[address(_cvx)] = true; rewardPerBlock = _rewardPerBlock; startBlock = _startBlock; endBlock = _endBlock; } function poolLength() external view returns (uint256) { return poolInfo.length; } // Add a new lp to the pool. Can only be called by the owner. // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do. function add( uint256 _allocPoint, IERC20 _lpToken, IRewarder _rewarder ) public onlyOwner nonReentrant { require(poolInfo.length < 32, "max pools"); require(!isAddedPool[address(_lpToken)], "add: Duplicated LP Token"); isAddedPool[address(_lpToken)] = true; massUpdatePools(); uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock; totalAllocPoint = totalAllocPoint.add(_allocPoint); poolInfo.push( PoolInfo({ lpToken: _lpToken, allocPoint: _allocPoint, lastRewardBlock: lastRewardBlock, accCvxPerShare: 0, rewarder: _rewarder }) ); } // Update the given pool's CVX allocation point. Can only be called by the owner. function set( uint256 _pid, uint256 _allocPoint, IRewarder _rewarder, bool _updateRewarder ) public onlyOwner nonReentrant { massUpdatePools(); totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add( _allocPoint ); require(totalAllocPoint > 0, "!alloc"); poolInfo[_pid].allocPoint = _allocPoint; if(_updateRewarder){ poolInfo[_pid].rewarder = _rewarder; } } // Return reward multiplier over the given _from to _to block. function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) { uint256 clampedTo = _to > endBlock ? endBlock : _to; uint256 clampedFrom = _from > endBlock ? endBlock : _from; return clampedTo.sub(clampedFrom); } // View function to see pending CVXs on frontend. function pendingCvx(uint256 _pid, address _user) external view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_user]; uint256 accCvxPerShare = pool.accCvxPerShare; uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (block.number > pool.lastRewardBlock && lpSupply != 0) { uint256 multiplier = getMultiplier( pool.lastRewardBlock, block.number ); uint256 cvxReward = multiplier .mul(rewardPerBlock) .mul(pool.allocPoint) .div(totalAllocPoint); accCvxPerShare = accCvxPerShare.add( cvxReward.mul(1e12).div(lpSupply) ); } return user.amount.mul(accCvxPerShare).div(1e12).sub(user.rewardDebt); } // Update reward vairables for all pools. Be careful of gas spending! function massUpdatePools() public { uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { updatePool(pid); } } // Update reward variables of the given pool to be up-to-date. function updatePool(uint256 _pid) public { PoolInfo storage pool = poolInfo[_pid]; if (block.number <= pool.lastRewardBlock) { return; } uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (lpSupply == 0) { pool.lastRewardBlock = block.number; return; } uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number); uint256 cvxReward = multiplier .mul(rewardPerBlock) .mul(pool.allocPoint) .div(totalAllocPoint); //cvx.mint(address(this), cvxReward); pool.accCvxPerShare = pool.accCvxPerShare.add( cvxReward.mul(1e12).div(lpSupply) ); pool.lastRewardBlock = block.number; } // Deposit LP tokens to MasterChef for CVX allocation. function deposit(uint256 _pid, uint256 _amount) public nonReentrant { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; updatePool(_pid); if (user.amount > 0) { uint256 pending = user .amount .mul(pool.accCvxPerShare) .div(1e12) .sub(user.rewardDebt); safeRewardTransfer(msg.sender, pending); } pool.lpToken.safeTransferFrom( address(msg.sender), address(this), _amount ); user.amount = user.amount.add(_amount); user.rewardDebt = user.amount.mul(pool.accCvxPerShare).div(1e12); //extra rewards IRewarder _rewarder = pool.rewarder; if (address(_rewarder) != address(0)) { _rewarder.onReward(_pid, msg.sender, msg.sender, 0, user.amount); } emit Deposit(msg.sender, _pid, _amount); } // Withdraw LP tokens from MasterChef. function withdraw(uint256 _pid, uint256 _amount) public nonReentrant { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; require(user.amount >= _amount, "withdraw: not good"); updatePool(_pid); uint256 pending = user.amount.mul(pool.accCvxPerShare).div(1e12).sub( user.rewardDebt ); safeRewardTransfer(msg.sender, pending); user.amount = user.amount.sub(_amount); user.rewardDebt = user.amount.mul(pool.accCvxPerShare).div(1e12); pool.lpToken.safeTransfer(address(msg.sender), _amount); //extra rewards IRewarder _rewarder = pool.rewarder; if (address(_rewarder) != address(0)) { _rewarder.onReward(_pid, msg.sender, msg.sender, pending, user.amount); } emit RewardPaid(msg.sender, _pid, pending); emit Withdraw(msg.sender, _pid, _amount); } function claim(uint256 _pid, address _account) external nonReentrant { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_account]; updatePool(_pid); uint256 pending = user.amount.mul(pool.accCvxPerShare).div(1e12).sub( user.rewardDebt ); safeRewardTransfer(_account, pending); user.rewardDebt = user.amount.mul(pool.accCvxPerShare).div(1e12); //extra rewards IRewarder _rewarder = pool.rewarder; if (address(_rewarder) != address(0)) { _rewarder.onReward(_pid, _account, _account, pending, user.amount); } emit RewardPaid(_account, _pid, pending); } // Withdraw without caring about rewards. EMERGENCY ONLY. function emergencyWithdraw(uint256 _pid) public nonReentrant { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; pool.lpToken.safeTransfer(address(msg.sender), user.amount); emit EmergencyWithdraw(msg.sender, _pid, user.amount); user.amount = 0; user.rewardDebt = 0; //extra rewards IRewarder _rewarder = pool.rewarder; if (address(_rewarder) != address(0)) { _rewarder.onReward(_pid, msg.sender, msg.sender, 0, 0); } } // Safe cvx transfer function, just in case if rounding error causes pool to not have enough CVXs. function safeRewardTransfer(address _to, uint256 _amount) internal { uint256 cvxBal = cvx.balanceOf(address(this)); if (_amount > cvxBal) { cvx.safeTransfer(_to, cvxBal); } else { cvx.safeTransfer(_to, _amount); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; interface IRewarder { using SafeERC20 for IERC20; function onReward(uint256 pid, address user, address recipient, uint256 sushiAmount, uint256 newLpAmount) external; function pendingTokens(uint256 pid, address user, uint256 sushiAmount) external view returns (IERC20[] memory, uint256[] memory); }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/ERC20.sol"; /** * @title cvxCrvToken * @author ConvexFinance * @notice Dumb ERC20 token that allows the operator (crvDepositor) to mint and burn tokens */ contract cvxCrvToken is ERC20 { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public operator; constructor(string memory _nameArg, string memory _symbolArg) public ERC20( _nameArg, _symbolArg ) { operator = msg.sender; } /** * @notice Allows the initial operator (deployer) to set the operator. * Note - crvDepositor has no way to change this back, so it's effectively immutable */ function setOperator(address _operator) external { require(msg.sender == operator, "!auth"); operator = _operator; } /** * @notice Allows the crvDepositor to mint */ function mint(address _to, uint256 _amount) external { require(msg.sender == operator, "!authorized"); _mint(_to, _amount); } /** * @notice Allows the crvDepositor to burn */ function burn(address _from, uint256 _amount) external { require(msg.sender == operator, "!authorized"); _burn(_from, _amount); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title CrvDepositor * @author ConvexFinance * @notice This is the entry point for CRV > cvxCRV wrapping. It accepts CRV, sends to 'staker' * for depositing into Curves VotingEscrow, and then mints cvxCRV at 1:1 via the 'minter' (cCrv) minus * the lockIncentive (initially 1%) which is used to basically compensate users who call the `lock` function on Curves * system (larger depositors would likely want to lock). */ contract CrvDepositor{ using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public immutable crvBpt; address public immutable escrow; uint256 private constant MAXTIME = 1 * 364 * 86400; uint256 private constant WEEK = 7 * 86400; uint256 public lockIncentive = 10; //incentive to users who spend gas to lock crvBpt uint256 public constant FEE_DENOMINATOR = 10000; address public feeManager; address public daoOperator; address public immutable staker; address public immutable minter; uint256 public incentiveCrv = 0; uint256 public unlockTime; bool public cooldown; /** * @param _staker CVX VoterProxy (0x989AEb4d175e16225E39E87d0D97A3360524AD80) * @param _minter cvxCRV token (0x62B9c7356A2Dc64a1969e19C23e4f579F9810Aa7) * @param _crvBpt crvBPT for veCRV deposits * @param _escrow CRV VotingEscrow (0x5f3b5DfEb7B28CDbD7FAba78963EE202a494e2A2) */ constructor( address _staker, address _minter, address _crvBpt, address _escrow, address _daoOperator ) public { staker = _staker; minter = _minter; crvBpt = _crvBpt; escrow = _escrow; feeManager = msg.sender; daoOperator = _daoOperator; } function setFeeManager(address _feeManager) external { require(msg.sender == feeManager, "!auth"); feeManager = _feeManager; } function setDaoOperator(address _daoOperator) external { require(msg.sender == daoOperator, "!auth"); daoOperator = _daoOperator; } function setFees(uint256 _lockIncentive) external{ require(msg.sender==feeManager, "!auth"); if(_lockIncentive >= 0 && _lockIncentive <= 30){ lockIncentive = _lockIncentive; } } function setCooldown(bool _cooldown) external { require(msg.sender == daoOperator, "!auth"); cooldown = _cooldown; } /** * @notice Called once to deposit the balance of CRV in this contract to the VotingEscrow */ function initialLock() external{ require(!cooldown, "cooldown"); require(msg.sender==feeManager, "!auth"); uint256 vecrv = IERC20(escrow).balanceOf(staker); if(vecrv == 0){ uint256 unlockAt = block.timestamp + MAXTIME; uint256 unlockInWeeks = (unlockAt/WEEK)*WEEK; //release old lock if exists IStaker(staker).release(); //create new lock uint256 crvBalanceStaker = IERC20(crvBpt).balanceOf(staker); IStaker(staker).createLock(crvBalanceStaker, unlockAt); unlockTime = unlockInWeeks; } } //lock curve function _lockCurve() internal { if(cooldown) { return; } uint256 crvBalance = IERC20(crvBpt).balanceOf(address(this)); if(crvBalance > 0){ IERC20(crvBpt).safeTransfer(staker, crvBalance); } //increase ammount uint256 crvBalanceStaker = IERC20(crvBpt).balanceOf(staker); if(crvBalanceStaker == 0){ return; } //increase amount IStaker(staker).increaseAmount(crvBalanceStaker); uint256 unlockAt = block.timestamp + MAXTIME; uint256 unlockInWeeks = (unlockAt/WEEK)*WEEK; //increase time too if over 1 week buffer if(unlockInWeeks.sub(unlockTime) >= WEEK){ IStaker(staker).increaseTime(unlockAt); unlockTime = unlockInWeeks; } } /** * @notice Locks the balance of CRV, and gives out an incentive to the caller */ function lockCurve() external { require(!cooldown, "cooldown"); _lockCurve(); //mint incentives if(incentiveCrv > 0){ ITokenMinter(minter).mint(msg.sender,incentiveCrv); incentiveCrv = 0; } } /** * @notice Deposit crvBpt for cvxCrv on behalf of another user * @dev See depositFor(address, uint256, bool, address) */ function deposit(uint256 _amount, bool _lock, address _stakeAddress) public { depositFor(msg.sender, _amount, _lock, _stakeAddress); } /** * @notice Deposit crvBpt for cvxCrv * @dev Can lock immediately or defer locking to someone else by paying a fee. * while users can choose to lock or defer, this is mostly in place so that * the cvx reward contract isnt costly to claim rewards. * @param _amount Units of CRV to deposit * @param _lock Lock now? or pay ~1% to the locker * @param _stakeAddress Stake in cvxCrv staking? */ function depositFor(address to, uint256 _amount, bool _lock, address _stakeAddress) public { require(_amount > 0,"!>0"); require(!cooldown, "cooldown"); if(_lock){ //lock immediately, transfer directly to staker to skip an erc20 transfer IERC20(crvBpt).safeTransferFrom(msg.sender, staker, _amount); _lockCurve(); if(incentiveCrv > 0){ //add the incentive tokens here so they can be staked together _amount = _amount.add(incentiveCrv); incentiveCrv = 0; } }else{ //move tokens here IERC20(crvBpt).safeTransferFrom(msg.sender, address(this), _amount); //defer lock cost to another user uint256 callIncentive = _amount.mul(lockIncentive).div(FEE_DENOMINATOR); _amount = _amount.sub(callIncentive); //add to a pool for lock caller incentiveCrv = incentiveCrv.add(callIncentive); } bool depositOnly = _stakeAddress == address(0); if(depositOnly){ //mint for to ITokenMinter(minter).mint(to,_amount); }else{ //mint here ITokenMinter(minter).mint(address(this),_amount); //stake for to IERC20(minter).safeApprove(_stakeAddress,0); IERC20(minter).safeApprove(_stakeAddress,_amount); IRewards(_stakeAddress).stakeFor(to,_amount); } } function deposit(uint256 _amount, bool _lock) external { deposit(_amount,_lock,address(0)); } function depositAll(bool _lock, address _stakeAddress) external{ uint256 crvBal = IERC20(crvBpt).balanceOf(msg.sender); deposit(crvBal,_lock,_stakeAddress); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./Interfaces.sol"; import "@openzeppelin/contracts-0.6/math/SafeMath.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts-0.6/utils/Address.sol"; import "@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol"; /** * @title Booster * @author ConvexFinance * @notice Main deposit contract; keeps track of pool info & user deposits; distributes rewards. * @dev They say all paths lead to Rome, and the cvxBooster is no different. This is where it all goes down. * It is responsible for tracking all the pools, it collects rewards from all pools and redirects it. */ contract Booster{ using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public immutable crv; address public immutable voteOwnership; address public immutable voteParameter; uint256 public lockIncentive = 825; //incentive to crv stakers uint256 public stakerIncentive = 825; //incentive to native token stakers uint256 public earmarkIncentive = 50; //incentive to users who spend gas to make calls uint256 public platformFee = 0; //possible fee to build treasury uint256 public constant MaxFees = 2500; uint256 public constant FEE_DENOMINATOR = 10000; address public owner; address public feeManager; address public poolManager; address public immutable staker; address public immutable minter; address public rewardFactory; address public stashFactory; address public tokenFactory; address public rewardArbitrator; address public voteDelegate; address public treasury; address public stakerRewards; //cvx rewards address public lockRewards; //cvxCrv rewards(crv) mapping(address => FeeDistro) public feeTokens; struct FeeDistro { address distro; address rewards; bool active; } bool public isShutdown; struct PoolInfo { address lptoken; address token; address gauge; address crvRewards; address stash; bool shutdown; } //index(pid) -> pool PoolInfo[] public poolInfo; mapping(address => bool) public gaugeMap; event Deposited(address indexed user, uint256 indexed poolid, uint256 amount); event Withdrawn(address indexed user, uint256 indexed poolid, uint256 amount); event PoolAdded(address lpToken, address gauge, address token, address rewardPool, address stash, uint256 pid); event PoolShutdown(uint256 poolId); event OwnerUpdated(address newOwner); event FeeManagerUpdated(address newFeeManager); event PoolManagerUpdated(address newPoolManager); event FactoriesUpdated(address rewardFactory, address stashFactory, address tokenFactory); event ArbitratorUpdated(address newArbitrator); event VoteDelegateUpdated(address newVoteDelegate); event RewardContractsUpdated(address lockRewards, address stakerRewards); event FeesUpdated(uint256 lockIncentive, uint256 stakerIncentive, uint256 earmarkIncentive, uint256 platformFee); event TreasuryUpdated(address newTreasury); event FeeInfoUpdated(address feeDistro, address lockFees, address feeToken); event FeeInfoChanged(address feeDistro, bool active); /** * @dev Constructor doing what constructors do. It is noteworthy that * a lot of basic config is set to 0 - expecting subsequent calls to setFeeInfo etc. * @param _staker VoterProxy (locks the crv and adds to all gauges) * @param _minter CVX token, or the thing that mints it * @param _crv CRV * @param _voteOwnership Address of the Curve DAO responsible for ownership stuff * @param _voteParameter Address of the Curve DAO responsible for param updates */ constructor( address _staker, address _minter, address _crv, address _voteOwnership, address _voteParameter ) public { staker = _staker; minter = _minter; crv = _crv; voteOwnership = _voteOwnership; voteParameter = _voteParameter; isShutdown = false; owner = msg.sender; voteDelegate = msg.sender; feeManager = msg.sender; poolManager = msg.sender; treasury = address(0); emit OwnerUpdated(msg.sender); emit VoteDelegateUpdated(msg.sender); emit FeeManagerUpdated(msg.sender); emit PoolManagerUpdated(msg.sender); } /// SETTER SECTION /// /** * @notice Owner is responsible for setting initial config, updating vote delegate and shutting system */ function setOwner(address _owner) external { require(msg.sender == owner, "!auth"); owner = _owner; emit OwnerUpdated(_owner); } /** * @notice Fee Manager can update the fees (lockIncentive, stakeIncentive, earmarkIncentive, platformFee) */ function setFeeManager(address _feeM) external { require(msg.sender == owner, "!auth"); feeManager = _feeM; emit FeeManagerUpdated(_feeM); } /** * @notice Pool manager is responsible for adding new pools */ function setPoolManager(address _poolM) external { require(msg.sender == poolManager, "!auth"); poolManager = _poolM; emit PoolManagerUpdated(_poolM); } /** * @notice Factories are used when deploying new pools. Only the stash factory is mutable after init */ function setFactories(address _rfactory, address _sfactory, address _tfactory) external { require(msg.sender == owner, "!auth"); //stash factory should be considered more safe to change //updating may be required to handle new types of gauges stashFactory = _sfactory; //reward factory only allow this to be called once even if owner //removes ability to inject malicious staking contracts //token factory can also be immutable if(rewardFactory == address(0)){ rewardFactory = _rfactory; tokenFactory = _tfactory; emit FactoriesUpdated(_rfactory, _sfactory, _tfactory); } else { emit FactoriesUpdated(address(0), _sfactory, address(0)); } } /** * @notice Arbitrator handles tokens that are used as secondary rewards across multiple pools */ function setArbitrator(address _arb) external { require(msg.sender==owner, "!auth"); rewardArbitrator = _arb; emit ArbitratorUpdated(_arb); } /** * @notice Vote Delegate has the rights to cast votes on the VoterProxy via the Booster */ function setVoteDelegate(address _voteDelegate) external { require(msg.sender==owner, "!auth"); voteDelegate = _voteDelegate; emit VoteDelegateUpdated(_voteDelegate); } /** * @notice Only called once, to set the addresses of cvxCrv (lockRewards) and cvx staking (stakerRewards) */ function setRewardContracts(address _rewards, address _stakerRewards) external { require(msg.sender == owner, "!auth"); //reward contracts are immutable or else the owner //has a means to redeploy and mint cvx via rewardClaimed() if(lockRewards == address(0)){ lockRewards = _rewards; stakerRewards = _stakerRewards; emit RewardContractsUpdated(_rewards, _stakerRewards); } } /** * @notice Set reward token and claim contract * @dev This creates a secondary (VirtualRewardsPool) rewards contract for the vcxCrv staking contract */ function setFeeInfo(address _feeToken, address _feeDistro) external { require(msg.sender == owner, "!auth"); require(!isShutdown, "shutdown"); require(lockRewards != address(0) && rewardFactory != address(0), "!initialised"); require(_feeToken != address(0) && _feeDistro != address(0), "!addresses"); require(IFeeDistributor(_feeDistro).getTokenTimeCursor(_feeToken) > 0, "!distro"); if(feeTokens[_feeToken].distro == address(0)){ require(!gaugeMap[_feeToken], "!token"); // Distributed directly if(_feeToken == crv){ feeTokens[crv] = FeeDistro({ distro: _feeDistro, rewards: lockRewards, active: true }); emit FeeInfoUpdated(_feeDistro, lockRewards, crv); } else { //create a new reward contract for the new token require(IRewards(lockRewards).extraRewardsLength() < 10, "too many rewards"); address rewards = IRewardFactory(rewardFactory).CreateTokenRewards(_feeToken, lockRewards, address(this)); feeTokens[_feeToken] = FeeDistro({ distro: _feeDistro, rewards: rewards, active: true }); emit FeeInfoUpdated(_feeDistro, rewards, _feeToken); } } else { feeTokens[_feeToken].distro = _feeDistro; emit FeeInfoUpdated(_feeDistro, address(0), _feeToken); } } /** * @notice Allows turning off or on for fee distro */ function updateFeeInfo(address _feeToken, bool _active) external { require(msg.sender==owner, "!auth"); require(feeTokens[_feeToken].distro != address(0), "Fee doesn't exist"); feeTokens[_feeToken].active = _active; emit FeeInfoChanged(_feeToken, _active); } /** * @notice Fee manager can set all the relevant fees * @param _lockFees % for cvxCrv stakers where 1% == 100 * @param _stakerFees % for CVX stakers where 1% == 100 * @param _callerFees % for whoever calls the claim where 1% == 100 * @param _platform % for "treasury" or vlCVX where 1% == 100 */ function setFees(uint256 _lockFees, uint256 _stakerFees, uint256 _callerFees, uint256 _platform) external{ require(msg.sender==feeManager, "!auth"); uint256 total = _lockFees.add(_stakerFees).add(_callerFees).add(_platform); require(total <= MaxFees, ">MaxFees"); require(_lockFees >= 300 && _lockFees <= 1500, "!lockFees"); require(_stakerFees >= 300 && _stakerFees <= 1500, "!stakerFees"); require(_callerFees >= 10 && _callerFees <= 100, "!callerFees"); require(_platform <= 200, "!platform"); lockIncentive = _lockFees; stakerIncentive = _stakerFees; earmarkIncentive = _callerFees; platformFee = _platform; emit FeesUpdated(_lockFees, _stakerFees, _callerFees, _platform); } /** * @notice Set the address of the treasury (i.e. vlCVX) */ function setTreasury(address _treasury) external { require(msg.sender==feeManager, "!auth"); treasury = _treasury; emit TreasuryUpdated(_treasury); } /// END SETTER SECTION /// function poolLength() external view returns (uint256) { return poolInfo.length; } /** * @notice Called by the PoolManager (i.e. PoolManagerProxy) to add a new pool - creates all the required * contracts (DepositToken, RewardPool, Stash) and then adds to the list! */ function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool){ require(msg.sender==poolManager && !isShutdown, "!add"); require(_gauge != address(0) && _lptoken != address(0),"!param"); require(feeTokens[_gauge].distro == address(0), "!gauge"); //the next pool's pid uint256 pid = poolInfo.length; //create a tokenized deposit address token = ITokenFactory(tokenFactory).CreateDepositToken(_lptoken); //create a reward contract for crv rewards address newRewardPool = IRewardFactory(rewardFactory).CreateCrvRewards(pid,token,_lptoken); //create a stash to handle extra incentives address stash = IStashFactory(stashFactory).CreateStash(pid,_gauge,staker,_stashVersion); //add the new pool poolInfo.push( PoolInfo({ lptoken: _lptoken, token: token, gauge: _gauge, crvRewards: newRewardPool, stash: stash, shutdown: false }) ); gaugeMap[_gauge] = true; //give stashes access to rewardfactory and voteproxy // voteproxy so it can grab the incentive tokens off the contract after claiming rewards // reward factory so that stashes can make new extra reward contracts if a new incentive is added to the gauge if(stash != address(0)){ poolInfo[pid].stash = stash; IStaker(staker).setStashAccess(stash,true); IRewardFactory(rewardFactory).setAccess(stash,true); } emit PoolAdded(_lptoken, _gauge, token, newRewardPool, stash, pid); return true; } /** * @notice Shuts down the pool by withdrawing everything from the gauge to here (can later be * claimed from depositors by using the withdraw fn) and marking it as shut down */ function shutdownPool(uint256 _pid) external returns(bool){ require(msg.sender==poolManager, "!auth"); PoolInfo storage pool = poolInfo[_pid]; //withdraw from gauge try IStaker(staker).withdrawAll(pool.lptoken,pool.gauge){ }catch{} pool.shutdown = true; gaugeMap[pool.gauge] = false; emit PoolShutdown(_pid); return true; } /** * @notice Shuts down the WHOLE SYSTEM by withdrawing all the LP tokens to here and then allowing * for subsequent withdrawal by any depositors. */ function shutdownSystem() external{ require(msg.sender == owner, "!auth"); isShutdown = true; for(uint i=0; i < poolInfo.length; i++){ PoolInfo storage pool = poolInfo[i]; if (pool.shutdown) continue; address token = pool.lptoken; address gauge = pool.gauge; //withdraw from gauge try IStaker(staker).withdrawAll(token,gauge){ pool.shutdown = true; }catch{} } } /** * @notice Deposits an "_amount" to a given gauge (specified by _pid), mints a `DepositToken` * and subsequently stakes that on Convex BaseRewardPool */ function deposit(uint256 _pid, uint256 _amount, bool _stake) public returns(bool){ require(!isShutdown,"shutdown"); PoolInfo storage pool = poolInfo[_pid]; require(pool.shutdown == false, "pool is closed"); //send to proxy to stake address lptoken = pool.lptoken; IERC20(lptoken).safeTransferFrom(msg.sender, staker, _amount); //stake address gauge = pool.gauge; require(gauge != address(0),"!gauge setting"); IStaker(staker).deposit(lptoken,gauge); //some gauges claim rewards when depositing, stash them in a seperate contract until next claim address stash = pool.stash; if(stash != address(0)){ IStash(stash).stashRewards(); } address token = pool.token; if(_stake){ //mint here and send to rewards on user behalf ITokenMinter(token).mint(address(this),_amount); address rewardContract = pool.crvRewards; IERC20(token).safeApprove(rewardContract,0); IERC20(token).safeApprove(rewardContract,_amount); IRewards(rewardContract).stakeFor(msg.sender,_amount); }else{ //add user balance directly ITokenMinter(token).mint(msg.sender,_amount); } emit Deposited(msg.sender, _pid, _amount); return true; } /** * @notice Deposits all a senders balance to a given gauge (specified by _pid), mints a `DepositToken` * and subsequently stakes that on Convex BaseRewardPool */ function depositAll(uint256 _pid, bool _stake) external returns(bool){ address lptoken = poolInfo[_pid].lptoken; uint256 balance = IERC20(lptoken).balanceOf(msg.sender); deposit(_pid,balance,_stake); return true; } /** * @notice Withdraws LP tokens from a given PID (& user). * 1. Burn the cvxLP balance from "_from" (implicit balance check) * 2. If pool !shutdown.. withdraw from gauge * 3. If stash, stash rewards * 4. Transfer out the LP tokens */ function _withdraw(uint256 _pid, uint256 _amount, address _from, address _to) internal { PoolInfo storage pool = poolInfo[_pid]; address lptoken = pool.lptoken; address gauge = pool.gauge; //remove lp balance address token = pool.token; ITokenMinter(token).burn(_from,_amount); //pull from gauge if not shutdown // if shutdown tokens will be in this contract if (!pool.shutdown) { IStaker(staker).withdraw(lptoken,gauge, _amount); } //some gauges claim rewards when withdrawing, stash them in a seperate contract until next claim //do not call if shutdown since stashes wont have access address stash = pool.stash; if(stash != address(0) && !isShutdown && !pool.shutdown){ IStash(stash).stashRewards(); } //return lp tokens IERC20(lptoken).safeTransfer(_to, _amount); emit Withdrawn(_to, _pid, _amount); } /** * @notice Withdraw a given amount from a pool (must already been unstaked from the Convex Reward Pool - * BaseRewardPool uses withdrawAndUnwrap to get around this) */ function withdraw(uint256 _pid, uint256 _amount) public returns(bool){ _withdraw(_pid,_amount,msg.sender,msg.sender); return true; } /** * @notice Withdraw all the senders LP tokens from a given gauge */ function withdrawAll(uint256 _pid) public returns(bool){ address token = poolInfo[_pid].token; uint256 userBal = IERC20(token).balanceOf(msg.sender); withdraw(_pid, userBal); return true; } /** * @notice Allows the actual BaseRewardPool to withdraw and send directly to the user */ function withdrawTo(uint256 _pid, uint256 _amount, address _to) external returns(bool){ address rewardContract = poolInfo[_pid].crvRewards; require(msg.sender == rewardContract,"!auth"); _withdraw(_pid,_amount,msg.sender,_to); return true; } /** * @notice set valid vote hash on VoterProxy */ function setVote(bytes32 _hash, bool valid) external returns(bool){ require(msg.sender == voteDelegate, "!auth"); IStaker(staker).setVote(_hash, valid); return true; } /** * @notice Delegate address votes on dao via VoterProxy */ function vote(uint256 _voteId, address _votingAddress, bool _support) external returns(bool){ require(msg.sender == voteDelegate, "!auth"); require(_votingAddress == voteOwnership || _votingAddress == voteParameter, "!voteAddr"); IStaker(staker).vote(_voteId,_votingAddress,_support); return true; } /** * @notice Delegate address votes on gauge weight via VoterProxy */ function voteGaugeWeight(address[] calldata _gauge, uint256[] calldata _weight ) external returns(bool){ require(msg.sender == voteDelegate, "!auth"); for(uint256 i = 0; i < _gauge.length; i++){ IStaker(staker).voteGaugeWeight(_gauge[i],_weight[i]); } return true; } /** * @notice Allows a stash to claim secondary rewards from a gauge */ function claimRewards(uint256 _pid, address _gauge) external returns(bool){ address stash = poolInfo[_pid].stash; require(msg.sender == stash,"!auth"); IStaker(staker).claimRewards(_gauge); return true; } /** * @notice Tells the Curve gauge to redirect any accrued rewards to the given stash via the VoterProxy */ function setGaugeRedirect(uint256 _pid) external returns(bool){ address stash = poolInfo[_pid].stash; require(msg.sender == stash,"!auth"); address gauge = poolInfo[_pid].gauge; bytes memory data = abi.encodeWithSelector(bytes4(keccak256("set_rewards_receiver(address)")), stash); IStaker(staker).execute(gauge,uint256(0),data); return true; } /** * @notice Basically a hugely pivotal function. * Responsible for collecting the crv from gauge, and then redistributing to the correct place. * Pays the caller a fee to process this. */ function _earmarkRewards(uint256 _pid) internal { PoolInfo storage pool = poolInfo[_pid]; require(pool.shutdown == false, "pool is closed"); address gauge = pool.gauge; //claim crv IStaker(staker).claimCrv(gauge); //check if there are extra rewards address stash = pool.stash; if(stash != address(0)){ //claim extra rewards IStash(stash).claimRewards(); //process extra rewards IStash(stash).processStash(); } //crv balance uint256 crvBal = IERC20(crv).balanceOf(address(this)); if (crvBal > 0) { // LockIncentive = cvxCrv stakers (currently 10%) uint256 _lockIncentive = crvBal.mul(lockIncentive).div(FEE_DENOMINATOR); // StakerIncentive = cvx stakers (currently 5%) uint256 _stakerIncentive = crvBal.mul(stakerIncentive).div(FEE_DENOMINATOR); // CallIncentive = caller of this contract (currently 1%) uint256 _callIncentive = crvBal.mul(earmarkIncentive).div(FEE_DENOMINATOR); // Treasury = vlCVX (currently 1%) if(treasury != address(0) && treasury != address(this) && platformFee > 0){ //only subtract after address condition check uint256 _platform = crvBal.mul(platformFee).div(FEE_DENOMINATOR); crvBal = crvBal.sub(_platform); IERC20(crv).safeTransfer(treasury, _platform); } //remove incentives from balance crvBal = crvBal.sub(_lockIncentive).sub(_callIncentive).sub(_stakerIncentive); //send incentives for calling IERC20(crv).safeTransfer(msg.sender, _callIncentive); //send crv to lp provider reward contract address rewardContract = pool.crvRewards; IERC20(crv).safeTransfer(rewardContract, crvBal); IRewards(rewardContract).queueNewRewards(crvBal); //send lockers' share of crv to reward contract IERC20(crv).safeTransfer(lockRewards, _lockIncentive); IRewards(lockRewards).queueNewRewards(_lockIncentive); //send stakers's share of crv to reward contract IERC20(crv).safeTransfer(stakerRewards, _stakerIncentive); } } /** * @notice Basically a hugely pivotal function. * Responsible for collecting the crv from gauge, and then redistributing to the correct place. * Pays the caller a fee to process this. */ function earmarkRewards(uint256 _pid) external returns(bool){ require(!isShutdown,"shutdown"); _earmarkRewards(_pid); return true; } /** * @notice Claim fees from curve distro contract, put in lockers' reward contract. * lockFees is the secondary reward contract that uses the virtual balances from cvxCrv */ function earmarkFees(address _feeToken) external returns(bool){ require(!isShutdown,"shutdown"); FeeDistro memory feeDistro = feeTokens[_feeToken]; require(feeDistro.active, "Inactive distro"); require(!gaugeMap[_feeToken], "Invalid token"); //claim fee rewards uint256 tokenBalanceBefore = IERC20(_feeToken).balanceOf(address(this)); IStaker(staker).claimFees(feeDistro.distro, _feeToken); uint256 tokenBalanceAfter = IERC20(_feeToken).balanceOf(address(this)); uint256 feesClaimed = tokenBalanceAfter.sub(tokenBalanceBefore); //send fee rewards to reward contract IERC20(_feeToken).safeTransfer(feeDistro.rewards, feesClaimed); IRewards(feeDistro.rewards).queueNewRewards(feesClaimed); return true; } /** * @notice Callback from reward contract when crv is received. * @dev Goes off and mints a relative amount of `CVX` based on the distribution schedule. */ function rewardClaimed(uint256 _pid, address _address, uint256 _amount) external returns(bool){ address rewardContract = poolInfo[_pid].crvRewards; require(msg.sender == rewardContract || msg.sender == lockRewards, "!auth"); //mint reward tokens ITokenMinter(minter).mint(_address,_amount); return true; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"rewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Deployed Bytecode
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Multichain Portfolio | 26 Chains
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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.