zellic-audit
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{
"language": "Solidity",
"sources": {
"convex-platform/contracts/contracts/ArbitartorVault.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n/**\n * @title ArbitratorVault\n * @author ConvexFinance\n * @notice Hold extra reward tokens on behalf of pools that have the same token as a reward (e.g. stkAAVE fro multiple aave pools)\n * @dev Sits on top of the STASH to basically handle the re-distribution of rewards to multiple stashes.\n * Because anyone can call gauge.claim_rewards(address) for the convex staking contract, rewards\n * could be forced to the wrong pool. Hold tokens here and distribute fairly(or at least more fairly),\n * to both pools at a later timing.\n */\ncontract ArbitratorVault{\n using SafeERC20 for IERC20;\n using Address for address;\n using SafeMath for uint256;\n\n address public operator;\n address public immutable depositor;\n\n\n /**\n * @param _depositor Booster address\n */\n constructor(address _depositor)public\n {\n operator = msg.sender;\n depositor = _depositor;\n }\n\n function setOperator(address _op) external {\n require(msg.sender == operator, \"!auth\");\n operator = _op;\n }\n\n /**\n * @notice Permissioned fn to distribute any accrued rewards to a relevant stash\n * @dev Only called by operator: ConvexMultisig\n */\n function distribute(address _token, uint256[] calldata _toPids, uint256[] calldata _amounts) external {\n require(msg.sender == operator, \"!auth\");\n\n for(uint256 i = 0; i < _toPids.length; i++){\n //get stash from pid\n (,,,,address stashAddress,bool shutdown) = IDeposit(depositor).poolInfo(_toPids[i]);\n\n //if sent to a shutdown pool, could get trapped\n require(shutdown==false,\"pool closed\");\n\n //transfer\n IERC20(_token).safeTransfer(stashAddress, _amounts[i]);\n }\n }\n\n}"
},
"convex-platform/contracts/contracts/Interfaces.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\n\n\ninterface ICurveGauge {\n function deposit(uint256) external;\n function balanceOf(address) external view returns (uint256);\n function withdraw(uint256) external;\n function claim_rewards() external;\n function reward_tokens(uint256) external view returns(address);//v2\n function rewarded_token() external view returns(address);//v1\n function lp_token() external view returns(address);\n}\n\ninterface ICurveVoteEscrow {\n function create_lock(uint256, uint256) external;\n function increase_amount(uint256) external;\n function increase_unlock_time(uint256) external;\n function withdraw() external;\n function smart_wallet_checker() external view returns (address);\n function commit_smart_wallet_checker(address) external;\n function apply_smart_wallet_checker() external;\n}\n\ninterface IWalletChecker {\n function check(address) external view returns (bool);\n function approveWallet(address) external;\n function dao() external view returns (address);\n}\n\ninterface IVoting{\n function vote(uint256, bool, bool) external; //voteId, support, executeIfDecided\n function getVote(uint256) external view returns(bool,bool,uint64,uint64,uint64,uint64,uint256,uint256,uint256,bytes memory); \n function vote_for_gauge_weights(address,uint256) external;\n}\n\ninterface IMinter{\n function mint(address) external;\n}\n\ninterface IStaker{\n function deposit(address, address) external returns (bool);\n function withdraw(address) external returns (uint256);\n function withdraw(address, address, uint256) external returns (bool);\n function withdrawAll(address, address) external returns (bool);\n function createLock(uint256, uint256) external returns(bool);\n function increaseAmount(uint256) external returns(bool);\n function increaseTime(uint256) external returns(bool);\n function release() external returns(bool);\n function claimCrv(address) external returns (uint256);\n function claimRewards(address) external returns(bool);\n function claimFees(address,address) external returns (uint256);\n function setStashAccess(address, bool) external returns (bool);\n function vote(uint256,address,bool) external returns(bool);\n function voteGaugeWeight(address,uint256) external returns(bool);\n function balanceOfPool(address) external view returns (uint256);\n function operator() external view returns (address);\n function execute(address _to, uint256 _value, bytes calldata _data) external returns (bool, bytes memory);\n function setVote(bytes32 hash, bool valid) external;\n function migrate(address to) external;\n}\n\ninterface IRewards{\n function stake(address, uint256) external;\n function stakeFor(address, uint256) external;\n function withdraw(address, uint256) external;\n function exit(address) external;\n function getReward(address) external;\n function queueNewRewards(uint256) external;\n function notifyRewardAmount(uint256) external;\n function addExtraReward(address) external;\n function extraRewardsLength() external view returns (uint256);\n function stakingToken() external view returns (address);\n function rewardToken() external view returns(address);\n function earned(address account) external view returns (uint256);\n}\n\ninterface IStash{\n function stashRewards() external returns (bool);\n function processStash() external returns (bool);\n function claimRewards() external returns (bool);\n function initialize(uint256 _pid, address _operator, address _staker, address _gauge, address _rewardFactory) external;\n}\n\ninterface IFeeDistributor {\n function claimToken(address user, address token) external returns (uint256);\n function claimTokens(address user, address[] calldata tokens) external returns (uint256[] memory);\n function getTokenTimeCursor(address token) external view returns (uint256);\n}\n\ninterface ITokenMinter{\n function mint(address,uint256) external;\n function burn(address,uint256) external;\n}\n\ninterface IDeposit{\n function isShutdown() external view returns(bool);\n function balanceOf(address _account) external view returns(uint256);\n function totalSupply() external view returns(uint256);\n function poolInfo(uint256) external view returns(address,address,address,address,address, bool);\n function rewardClaimed(uint256,address,uint256) external;\n function withdrawTo(uint256,uint256,address) external;\n function claimRewards(uint256,address) external returns(bool);\n function rewardArbitrator() external returns(address);\n function setGaugeRedirect(uint256 _pid) external returns(bool);\n function owner() external returns(address);\n function deposit(uint256 _pid, uint256 _amount, bool _stake) external returns(bool);\n}\n\ninterface ICrvDeposit{\n function deposit(uint256, bool) external;\n function lockIncentive() external view returns(uint256);\n}\n\ninterface IRewardFactory{\n function setAccess(address,bool) external;\n function CreateCrvRewards(uint256,address,address) external returns(address);\n function CreateTokenRewards(address,address,address) external returns(address);\n function activeRewardCount(address) external view returns(uint256);\n function addActiveReward(address,uint256) external returns(bool);\n function removeActiveReward(address,uint256) external returns(bool);\n}\n\ninterface IStashFactory{\n function CreateStash(uint256,address,address,uint256) external returns(address);\n}\n\ninterface ITokenFactory{\n function CreateDepositToken(address) external returns(address);\n}\n\ninterface IPools{\n function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool);\n function forceAddPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool);\n function shutdownPool(uint256 _pid) external returns(bool);\n function poolInfo(uint256) external view returns(address,address,address,address,address,bool);\n function poolLength() external view returns (uint256);\n function gaugeMap(address) external view returns(bool);\n function setPoolManager(address _poolM) external;\n}\n\ninterface IVestedEscrow{\n function fund(address[] calldata _recipient, uint256[] calldata _amount) external returns(bool);\n}\n\ninterface IRewardDeposit {\n function addReward(address, uint256) external;\n}\n"
},
"@openzeppelin/contracts-0.6/math/SafeMath.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\n/**\n * @dev Wrappers over Solidity's arithmetic operations with added overflow\n * checks.\n *\n * Arithmetic operations in Solidity wrap on overflow. This can easily result\n * in bugs, because programmers usually assume that an overflow raises an\n * error, which is the standard behavior in high level programming languages.\n * `SafeMath` restores this intuition by reverting the transaction when an\n * operation overflows.\n *\n * Using this library instead of the unchecked operations eliminates an entire\n * class of bugs, so it's recommended to use it always.\n */\nlibrary SafeMath {\n /**\n * @dev Returns the addition of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n uint256 c = a + b;\n if (c < a) return (false, 0);\n return (true, c);\n }\n\n /**\n * @dev Returns the substraction of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n if (b > a) return (false, 0);\n return (true, a - b);\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n // Gas optimization: this is cheaper than requiring 'a' not being zero, but the\n // benefit is lost if 'b' is also tested.\n // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n if (a == 0) return (true, 0);\n uint256 c = a * b;\n if (c / a != b) return (false, 0);\n return (true, c);\n }\n\n /**\n * @dev Returns the division of two unsigned integers, with a division by zero flag.\n *\n * _Available since v3.4._\n */\n function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n if (b == 0) return (false, 0);\n return (true, a / b);\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n *\n * _Available since v3.4._\n */\n function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n if (b == 0) return (false, 0);\n return (true, a % b);\n }\n\n /**\n * @dev Returns the addition of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `+` operator.\n *\n * Requirements:\n *\n * - Addition cannot overflow.\n */\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n require(c >= a, \"SafeMath: addition overflow\");\n return c;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting on\n * overflow (when the result is negative).\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n require(b <= a, \"SafeMath: subtraction overflow\");\n return a - b;\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `*` operator.\n *\n * Requirements:\n *\n * - Multiplication cannot overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n if (a == 0) return 0;\n uint256 c = a * b;\n require(c / a == b, \"SafeMath: multiplication overflow\");\n return c;\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n * `revert` opcode (which leaves remaining gas untouched) while Solidity\n * uses an invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n require(b > 0, \"SafeMath: division by zero\");\n return a / b;\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting when dividing by zero.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n require(b > 0, \"SafeMath: modulo by zero\");\n return a % b;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n * overflow (when the result is negative).\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {trySub}.\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n require(b <= a, errorMessage);\n return a - b;\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting with custom message on\n * division by zero. The result is rounded towards zero.\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {tryDiv}.\n *\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n * `revert` opcode (which leaves remaining gas untouched) while Solidity\n * uses an invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n require(b > 0, errorMessage);\n return a / b;\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting with custom message when dividing by zero.\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {tryMod}.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n require(b > 0, errorMessage);\n return a % b;\n }\n}\n"
},
"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `recipient`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address recipient, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `sender` to `recipient` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);\n\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n"
},
"@openzeppelin/contracts-0.6/utils/Address.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.2 <0.8.0;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize, which returns 0 for contracts in\n // construction, since the code is only stored at the end of the\n // constructor execution.\n\n uint256 size;\n // solhint-disable-next-line no-inline-assembly\n assembly { size := extcodesize(account) }\n return size > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n // solhint-disable-next-line avoid-low-level-calls, avoid-call-value\n (bool success, ) = recipient.call{ value: amount }(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain`call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n require(isContract(target), \"Address: call to non-contract\");\n\n // solhint-disable-next-line avoid-low-level-calls\n (bool success, bytes memory returndata) = target.call{ value: value }(data);\n return _verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n // solhint-disable-next-line avoid-low-level-calls\n (bool success, bytes memory returndata) = target.staticcall(data);\n return _verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {\n require(isContract(target), \"Address: delegate call to non-contract\");\n\n // solhint-disable-next-line avoid-low-level-calls\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return _verifyCallResult(success, returndata, errorMessage);\n }\n\n function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {\n if (success) {\n return returndata;\n } else {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n\n // solhint-disable-next-line no-inline-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n }\n}\n"
},
"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\nimport \"./IERC20.sol\";\nimport \"../../math/SafeMath.sol\";\nimport \"../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n using SafeMath for uint256;\n using Address for address;\n\n function safeTransfer(IERC20 token, address to, uint256 value) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n }\n\n function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n }\n\n /**\n * @dev Deprecated. This function has issues similar to the ones found in\n * {IERC20-approve}, and its usage is discouraged.\n *\n * Whenever possible, use {safeIncreaseAllowance} and\n * {safeDecreaseAllowance} instead.\n */\n function safeApprove(IERC20 token, address spender, uint256 value) internal {\n // safeApprove should only be called when setting an initial allowance,\n // or when resetting it to zero. To increase and decrease it, use\n // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n // solhint-disable-next-line max-line-length\n require((value == 0) || (token.allowance(address(this), spender) == 0),\n \"SafeERC20: approve from non-zero to non-zero allowance\"\n );\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n }\n\n function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n uint256 newAllowance = token.allowance(address(this), spender).add(value);\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n\n function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n uint256 newAllowance = token.allowance(address(this), spender).sub(value, \"SafeERC20: decreased allowance below zero\");\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n\n /**\n * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n * on the return value: the return value is optional (but if data is returned, it must not be false).\n * @param token The token targeted by the call.\n * @param data The call data (encoded using abi.encode or one of its variants).\n */\n function _callOptionalReturn(IERC20 token, bytes memory data) private {\n // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n // the target address contains contract code and also asserts for success in the low-level call.\n\n bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n if (returndata.length > 0) { // Return data is optional\n // solhint-disable-next-line max-line-length\n require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n }\n }\n}\n"
},
"convex-platform/contracts/contracts/VoterProxy.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n/**\n * @title VoterProxy\n * @author ConvexFinance\n * @notice VoterProxy whitelisted in the curve SmartWalletWhitelist that\n * participates in Curve governance. Also handles all deposits since this is \n * the address that has the voting power.\n */\ncontract VoterProxy {\n using SafeERC20 for IERC20;\n using Address for address;\n using SafeMath for uint256;\n\n address public mintr;\n address public immutable crv;\n address public immutable crvBpt;\n\n address public immutable escrow;\n address public gaugeController;\n address public rewardDeposit;\n address public withdrawer;\n\n address public owner;\n address public operator;\n address public depositor;\n \n mapping (address => bool) private stashPool;\n mapping (address => bool) private protectedTokens;\n mapping (bytes32 => bool) private votes;\n\n bytes4 constant internal EIP1271_MAGIC_VALUE = 0x1626ba7e;\n\n event VoteSet(bytes32 hash, bool valid);\n\n /**\n * @param _mintr CRV minter\n * @param _crv CRV Token address\n * @param _crvBpt CRV:ETH 80-20 BPT Token address\n * @param _escrow Curve Voting escrow contract\n * @param _gaugeController Curve Gauge Controller\n * Controls liquidity gauges and the issuance of coins through the gauges\n */\n constructor(\n address _mintr,\n address _crv,\n address _crvBpt,\n address _escrow,\n address _gaugeController\n ) public {\n mintr = _mintr; \n crv = _crv;\n crvBpt = _crvBpt;\n escrow = _escrow;\n gaugeController = _gaugeController;\n owner = msg.sender;\n\n protectedTokens[_crv] = true;\n protectedTokens[_crvBpt] = true;\n }\n\n function getName() external pure returns (string memory) {\n return \"BalancerVoterProxy\";\n }\n\n function setOwner(address _owner) external {\n require(msg.sender == owner, \"!auth\");\n owner = _owner;\n }\n\n /**\n * @notice Allows dao to set the reward withdrawal address\n * @param _withdrawer Whitelisted withdrawer\n * @param _rewardDeposit Distributor address\n */\n function setRewardDeposit(address _withdrawer, address _rewardDeposit) external {\n require(msg.sender == owner, \"!auth\");\n withdrawer = _withdrawer;\n rewardDeposit = _rewardDeposit;\n }\n\n /**\n * @notice Allows dao to set the external system config, should it change in the future\n * @param _gaugeController External gauge controller address\n * @param _mintr Token minter address for claiming rewards\n */\n function setSystemConfig(address _gaugeController, address _mintr) external returns (bool) {\n require(msg.sender == owner, \"!auth\");\n gaugeController = _gaugeController;\n mintr = _mintr;\n return true;\n }\n\n /**\n * @notice Set the operator of the VoterProxy\n * @param _operator Address of the operator (Booster)\n */\n function setOperator(address _operator) external {\n require(msg.sender == owner, \"!auth\");\n require(operator == address(0) || IDeposit(operator).isShutdown() == true, \"needs shutdown\");\n \n operator = _operator;\n }\n\n /**\n * @notice Set the depositor of the VoterProxy\n * @param _depositor Address of the depositor (CrvDepositor)\n */\n function setDepositor(address _depositor) external {\n require(msg.sender == owner, \"!auth\");\n\n depositor = _depositor;\n }\n\n function setStashAccess(address _stash, bool _status) external returns(bool){\n require(msg.sender == operator, \"!auth\");\n if(_stash != address(0)){\n stashPool[_stash] = _status;\n }\n return true;\n }\n\n /**\n * @notice Save a vote hash so when snapshot.org asks this contract if \n * a vote signature is valid we are able to check for a valid hash\n * and return the appropriate response inline with EIP 1721\n * @param _hash Hash of vote signature that was sent to snapshot.org\n * @param _valid Is the hash valid\n */\n function setVote(bytes32 _hash, bool _valid) external {\n require(msg.sender == operator, \"!auth\");\n votes[_hash] = _valid;\n emit VoteSet(_hash, _valid);\n }\n\n /**\n * @notice Verifies that the hash is valid\n * @dev Snapshot Hub will call this function when a vote is submitted using\n * snapshot.js on behalf of this contract. Snapshot Hub will call this\n * function with the hash and the signature of the vote that was cast.\n * @param _hash Hash of the message that was sent to Snapshot Hub to cast a vote\n * @return EIP1271 magic value if the signature is value \n */\n function isValidSignature(bytes32 _hash, bytes memory) public view returns (bytes4) {\n if(votes[_hash]) {\n return EIP1271_MAGIC_VALUE;\n } else {\n return 0xffffffff;\n } \n }\n\n /**\n * @notice Deposit tokens into the Curve Gauge\n * @dev Only can be called by the operator (Booster) once this contract has been\n * whitelisted by the Curve DAO\n * @param _token Deposit LP token address\n * @param _gauge Gauge contract to deposit to \n */ \n function deposit(address _token, address _gauge) external returns(bool){\n require(msg.sender == operator, \"!auth\");\n if(protectedTokens[_token] == false){\n protectedTokens[_token] = true;\n }\n if(protectedTokens[_gauge] == false){\n protectedTokens[_gauge] = true;\n }\n uint256 balance = IERC20(_token).balanceOf(address(this));\n if (balance > 0) {\n IERC20(_token).safeApprove(_gauge, 0);\n IERC20(_token).safeApprove(_gauge, balance);\n ICurveGauge(_gauge).deposit(balance);\n }\n return true;\n }\n\n /**\n * @notice Withdraw ERC20 tokens that have been distributed as extra rewards\n * @dev Tokens shouldn't end up here if they can help it. However, dao can\n * set a withdrawer that can process these to some ExtraRewardDistribution.\n */\n function withdraw(IERC20 _asset) external returns (uint256 balance) {\n require(msg.sender == withdrawer, \"!auth\");\n require(protectedTokens[address(_asset)] == false, \"protected\");\n\n balance = _asset.balanceOf(address(this));\n _asset.safeApprove(rewardDeposit, 0);\n _asset.safeApprove(rewardDeposit, balance);\n IRewardDeposit(rewardDeposit).addReward(address(_asset), balance);\n return balance;\n }\n\n /**\n * @notice Withdraw LP tokens from a gauge \n * @dev Only callable by the operator \n * @param _token LP token address\n * @param _gauge Gauge for this LP token\n * @param _amount Amount of LP token to withdraw\n */\n function withdraw(address _token, address _gauge, uint256 _amount) public returns(bool){\n require(msg.sender == operator, \"!auth\");\n uint256 _balance = IERC20(_token).balanceOf(address(this));\n if (_balance < _amount) {\n _amount = _withdrawSome(_gauge, _amount.sub(_balance));\n _amount = _amount.add(_balance);\n }\n IERC20(_token).safeTransfer(msg.sender, _amount);\n return true;\n }\n\n /**\n * @notice Withdraw all LP tokens from a gauge \n * @dev Only callable by the operator \n * @param _token LP token address\n * @param _gauge Gauge for this LP token\n */\n function withdrawAll(address _token, address _gauge) external returns(bool){\n require(msg.sender == operator, \"!auth\");\n uint256 amount = balanceOfPool(_gauge).add(IERC20(_token).balanceOf(address(this)));\n withdraw(_token, _gauge, amount);\n return true;\n }\n\n function _withdrawSome(address _gauge, uint256 _amount) internal returns (uint256) {\n ICurveGauge(_gauge).withdraw(_amount);\n return _amount;\n }\n \n \n /**\n * @notice Lock CRV in Curve's voting escrow contract\n * @dev Called by the CrvDepositor contract\n * @param _value Amount of crv to lock\n * @param _unlockTime Timestamp to unlock (max is 4 years)\n */\n function createLock(uint256 _value, uint256 _unlockTime) external returns(bool){\n require(msg.sender == depositor, \"!auth\");\n IERC20(crvBpt).safeApprove(escrow, 0);\n IERC20(crvBpt).safeApprove(escrow, _value);\n ICurveVoteEscrow(escrow).create_lock(_value, _unlockTime);\n return true;\n }\n \n /**\n * @notice Called by the CrvDepositor to increase amount of locked curve\n */\n function increaseAmount(uint256 _value) external returns(bool){\n require(msg.sender == depositor, \"!auth\");\n IERC20(crvBpt).safeApprove(escrow, 0);\n IERC20(crvBpt).safeApprove(escrow, _value);\n ICurveVoteEscrow(escrow).increase_amount(_value);\n return true;\n }\n\n /**\n * @notice Called by the CrvDepositor to increase unlocked time of curve\n * @param _value Timestamp to increase locking to\n */\n function increaseTime(uint256 _value) external returns(bool){\n require(msg.sender == depositor, \"!auth\");\n ICurveVoteEscrow(escrow).increase_unlock_time(_value);\n return true;\n }\n\n /**\n * @notice Withdraw all CRV from Curve's voting escrow contract\n * @dev Only callable by CrvDepositor and can only withdraw if lock has expired\n */\n function release() external returns(bool){\n require(msg.sender == depositor, \"!auth\");\n ICurveVoteEscrow(escrow).withdraw();\n return true;\n }\n\n /**\n * @notice Vote on CRV DAO for proposal\n */\n function vote(uint256 _voteId, address _votingAddress, bool _support) external returns(bool){\n require(msg.sender == operator, \"!auth\");\n IVoting(_votingAddress).vote(_voteId,_support,false);\n return true;\n }\n\n /**\n * @notice Vote for a single gauge weight via the controller\n */\n function voteGaugeWeight(address _gauge, uint256 _weight) external returns(bool){\n require(msg.sender == operator, \"!auth\");\n\n //vote\n IVoting(gaugeController).vote_for_gauge_weights(_gauge, _weight);\n return true;\n }\n\n /**\n * @notice Claim CRV from Curve\n * @dev Claim CRV for LP token staking from the CRV minter contract\n */\n function claimCrv(address _gauge) external returns (uint256){\n require(msg.sender == operator, \"!auth\");\n \n uint256 _balance = 0;\n try IMinter(mintr).mint(_gauge){\n _balance = IERC20(crv).balanceOf(address(this));\n IERC20(crv).safeTransfer(operator, _balance);\n }catch{}\n\n return _balance;\n }\n\n /**\n * @notice Claim extra rewards from gauge\n * @dev Called by operator (Booster) to claim extra rewards \n */\n function claimRewards(address _gauge) external returns(bool){\n require(msg.sender == operator, \"!auth\");\n ICurveGauge(_gauge).claim_rewards();\n return true;\n }\n\n /**\n * @notice Claim fees (3crv) from staking lp tokens\n * @dev Only callable by the operator Booster\n * @param _distroContract Fee distribution contract\n * @param _token LP token to claim fees for\n */\n function claimFees(address _distroContract, address _token) external returns (uint256){\n require(msg.sender == operator, \"!auth\");\n IFeeDistributor(_distroContract).claimToken(address(this), _token);\n uint256 _balance = IERC20(_token).balanceOf(address(this));\n IERC20(_token).safeTransfer(operator, _balance);\n return _balance;\n } \n\n function balanceOfPool(address _gauge) public view returns (uint256) {\n return ICurveGauge(_gauge).balanceOf(address(this));\n }\n\n function execute(\n address _to,\n uint256 _value,\n bytes calldata _data\n ) external returns (bool, bytes memory) {\n require(msg.sender == operator,\"!auth\");\n\n (bool success, bytes memory result) = _to.call{value:_value}(_data);\n require(success, \"!success\");\n\n return (success, result);\n }\n\n}\n"
},
"convex-platform/contracts/contracts/TokenFactory.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"./DepositToken.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n/**\n * @title TokenFactory\n * @author ConvexFinance\n * @notice Token factory used to create Deposit Tokens. These are the tokenized\n * pool deposit tokens e.g cvx3crv\n */\ncontract TokenFactory {\n using Address for address;\n\n address public immutable operator;\n string public namePostfix;\n string public symbolPrefix;\n\n event DepositTokenCreated(address token, address lpToken);\n\n /**\n * @param _operator Operator is Booster\n * @param _namePostfix Postfixes lpToken name\n * @param _symbolPrefix Prefixed lpToken symbol\n */\n constructor(\n address _operator,\n string memory _namePostfix,\n string memory _symbolPrefix\n ) public {\n operator = _operator;\n namePostfix = _namePostfix;\n symbolPrefix = _symbolPrefix;\n }\n\n function CreateDepositToken(address _lptoken) external returns(address){\n require(msg.sender == operator, \"!authorized\");\n\n DepositToken dtoken = new DepositToken(operator,_lptoken,namePostfix,symbolPrefix);\n emit DepositTokenCreated(address(dtoken), _lptoken);\n return address(dtoken);\n }\n}\n"
},
"convex-platform/contracts/contracts/DepositToken.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/ERC20.sol\";\n\n\n/**\n * @title DepositToken\n * @author ConvexFinance\n * @notice Simply creates a token that can be minted and burned from the operator\n */\ncontract DepositToken is ERC20 {\n using SafeERC20 for IERC20;\n using Address for address;\n using SafeMath for uint256;\n\n address public operator;\n\n /**\n * @param _operator Booster\n * @param _lptoken Underlying LP token for deposits\n * @param _namePostfix Postfixes lpToken name\n * @param _symbolPrefix Prefixed lpToken symbol\n */\n constructor(\n address _operator,\n address _lptoken,\n string memory _namePostfix,\n string memory _symbolPrefix\n )\n public\n ERC20(\n string(\n abi.encodePacked(ERC20(_lptoken).name(), _namePostfix)\n ),\n string(abi.encodePacked(_symbolPrefix, ERC20(_lptoken).symbol()))\n )\n {\n operator = _operator;\n }\n \n function mint(address _to, uint256 _amount) external {\n require(msg.sender == operator, \"!authorized\");\n \n _mint(_to, _amount);\n }\n\n function burn(address _from, uint256 _amount) external {\n require(msg.sender == operator, \"!authorized\");\n \n _burn(_from, _amount);\n }\n\n}\n"
},
"@openzeppelin/contracts-0.6/token/ERC20/ERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\nimport \"../../utils/Context.sol\";\nimport \"./IERC20.sol\";\nimport \"../../math/SafeMath.sol\";\n\n/**\n * @dev Implementation of the {IERC20} interface.\n *\n * This implementation is agnostic to the way tokens are created. This means\n * that a supply mechanism has to be added in a derived contract using {_mint}.\n * For a generic mechanism see {ERC20PresetMinterPauser}.\n *\n * TIP: For a detailed writeup see our guide\n * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\n *\n * We have followed general OpenZeppelin guidelines: functions revert instead\n * of returning `false` on failure. This behavior is nonetheless conventional\n * and does not conflict with the expectations of ERC20 applications.\n *\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n * This allows applications to reconstruct the allowance for all accounts just\n * by listening to said events. Other implementations of the EIP may not emit\n * these events, as it isn't required by the specification.\n *\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n * functions have been added to mitigate the well-known issues around setting\n * allowances. See {IERC20-approve}.\n */\ncontract ERC20 is Context, IERC20 {\n using SafeMath for uint256;\n\n mapping (address => uint256) private _balances;\n\n mapping (address => mapping (address => uint256)) private _allowances;\n\n uint256 private _totalSupply;\n\n string private _name;\n string private _symbol;\n uint8 private _decimals;\n\n /**\n * @dev Sets the values for {name} and {symbol}, initializes {decimals} with\n * a default value of 18.\n *\n * To select a different value for {decimals}, use {_setupDecimals}.\n *\n * All three of these values are immutable: they can only be set once during\n * construction.\n */\n constructor (string memory name_, string memory symbol_) public {\n _name = name_;\n _symbol = symbol_;\n _decimals = 18;\n }\n\n /**\n * @dev Returns the name of the token.\n */\n function name() public view virtual returns (string memory) {\n return _name;\n }\n\n /**\n * @dev Returns the symbol of the token, usually a shorter version of the\n * name.\n */\n function symbol() public view virtual returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev Returns the number of decimals used to get its user representation.\n * For example, if `decimals` equals `2`, a balance of `505` tokens should\n * be displayed to a user as `5,05` (`505 / 10 ** 2`).\n *\n * Tokens usually opt for a value of 18, imitating the relationship between\n * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is\n * called.\n *\n * NOTE: This information is only used for _display_ purposes: it in\n * no way affects any of the arithmetic of the contract, including\n * {IERC20-balanceOf} and {IERC20-transfer}.\n */\n function decimals() public view virtual returns (uint8) {\n return _decimals;\n }\n\n /**\n * @dev See {IERC20-totalSupply}.\n */\n function totalSupply() public view virtual override returns (uint256) {\n return _totalSupply;\n }\n\n /**\n * @dev See {IERC20-balanceOf}.\n */\n function balanceOf(address account) public view virtual override returns (uint256) {\n return _balances[account];\n }\n\n /**\n * @dev See {IERC20-transfer}.\n *\n * Requirements:\n *\n * - `recipient` cannot be the zero address.\n * - the caller must have a balance of at least `amount`.\n */\n function transfer(address recipient, uint256 amount) public virtual override returns (bool) {\n _transfer(_msgSender(), recipient, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-allowance}.\n */\n function allowance(address owner, address spender) public view virtual override returns (uint256) {\n return _allowances[owner][spender];\n }\n\n /**\n * @dev See {IERC20-approve}.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\n _approve(_msgSender(), spender, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-transferFrom}.\n *\n * Emits an {Approval} event indicating the updated allowance. This is not\n * required by the EIP. See the note at the beginning of {ERC20}.\n *\n * Requirements:\n *\n * - `sender` and `recipient` cannot be the zero address.\n * - `sender` must have a balance of at least `amount`.\n * - the caller must have allowance for ``sender``'s tokens of at least\n * `amount`.\n */\n function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {\n _transfer(sender, recipient, amount);\n _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, \"ERC20: transfer amount exceeds allowance\"));\n return true;\n }\n\n /**\n * @dev Atomically increases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\n _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));\n return true;\n }\n\n /**\n * @dev Atomically decreases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `spender` must have allowance for the caller of at least\n * `subtractedValue`.\n */\n function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\n _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, \"ERC20: decreased allowance below zero\"));\n return true;\n }\n\n /**\n * @dev Moves tokens `amount` from `sender` to `recipient`.\n *\n * This is internal function is equivalent to {transfer}, and can be used to\n * e.g. implement automatic token fees, slashing mechanisms, etc.\n *\n * Emits a {Transfer} event.\n *\n * Requirements:\n *\n * - `sender` cannot be the zero address.\n * - `recipient` cannot be the zero address.\n * - `sender` must have a balance of at least `amount`.\n */\n function _transfer(address sender, address recipient, uint256 amount) internal virtual {\n require(sender != address(0), \"ERC20: transfer from the zero address\");\n require(recipient != address(0), \"ERC20: transfer to the zero address\");\n\n _beforeTokenTransfer(sender, recipient, amount);\n\n _balances[sender] = _balances[sender].sub(amount, \"ERC20: transfer amount exceeds balance\");\n _balances[recipient] = _balances[recipient].add(amount);\n emit Transfer(sender, recipient, amount);\n }\n\n /** @dev Creates `amount` tokens and assigns them to `account`, increasing\n * the total supply.\n *\n * Emits a {Transfer} event with `from` set to the zero address.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n */\n function _mint(address account, uint256 amount) internal virtual {\n require(account != address(0), \"ERC20: mint to the zero address\");\n\n _beforeTokenTransfer(address(0), account, amount);\n\n _totalSupply = _totalSupply.add(amount);\n _balances[account] = _balances[account].add(amount);\n emit Transfer(address(0), account, amount);\n }\n\n /**\n * @dev Destroys `amount` tokens from `account`, reducing the\n * total supply.\n *\n * Emits a {Transfer} event with `to` set to the zero address.\n *\n * Requirements:\n *\n * - `account` cannot be the zero address.\n * - `account` must have at least `amount` tokens.\n */\n function _burn(address account, uint256 amount) internal virtual {\n require(account != address(0), \"ERC20: burn from the zero address\");\n\n _beforeTokenTransfer(account, address(0), amount);\n\n _balances[account] = _balances[account].sub(amount, \"ERC20: burn amount exceeds balance\");\n _totalSupply = _totalSupply.sub(amount);\n emit Transfer(account, address(0), amount);\n }\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n *\n * This internal function is equivalent to `approve`, and can be used to\n * e.g. set automatic allowances for certain subsystems, etc.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `owner` cannot be the zero address.\n * - `spender` cannot be the zero address.\n */\n function _approve(address owner, address spender, uint256 amount) internal virtual {\n require(owner != address(0), \"ERC20: approve from the zero address\");\n require(spender != address(0), \"ERC20: approve to the zero address\");\n\n _allowances[owner][spender] = amount;\n emit Approval(owner, spender, amount);\n }\n\n /**\n * @dev Sets {decimals} to a value other than the default one of 18.\n *\n * WARNING: This function should only be called from the constructor. Most\n * applications that interact with token contracts will not expect\n * {decimals} to ever change, and may work incorrectly if it does.\n */\n function _setupDecimals(uint8 decimals_) internal virtual {\n _decimals = decimals_;\n }\n\n /**\n * @dev Hook that is called before any transfer of tokens. This includes\n * minting and burning.\n *\n * Calling conditions:\n *\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n * will be to transferred to `to`.\n * - when `from` is zero, `amount` tokens will be minted for `to`.\n * - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n * - `from` and `to` are never both zero.\n *\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n */\n function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }\n}\n"
},
"@openzeppelin/contracts-0.6/utils/Context.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\n/*\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with GSN meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n function _msgSender() internal view virtual returns (address payable) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes memory) {\n this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691\n return msg.data;\n }\n}\n"
},
"convex-platform/contracts/contracts/StashFactoryV2.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"./interfaces/IProxyFactory.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n/**\n * @title StashFactoryV2\n * @author ConvexFinance\n * @notice Factory to deploy reward stash contracts that handle extra rewards\n */\ncontract StashFactoryV2 {\n using Address for address;\n\n bytes4 private constant rewarded_token = 0x16fa50b1; //rewarded_token()\n bytes4 private constant reward_tokens = 0x54c49fe9; //reward_tokens(uint256)\n bytes4 private constant rewards_receiver = 0x01ddabf1; //rewards_receiver(address)\n\n address public immutable operator;\n address public immutable rewardFactory;\n address public immutable proxyFactory;\n\n address public v1Implementation;\n address public v2Implementation;\n address public v3Implementation;\n\n event StashCreated(address stash, uint256 stashVersion);\n\n /**\n * @param _operator Operator is Booster\n * @param _rewardFactory Factory that creates reward contract that are \n * VirtualBalanceRewardPool's used for extra pool rewards\n * @param _proxyFactory Deploy proxies with stash implementation\n */\n constructor(address _operator, address _rewardFactory, address _proxyFactory) public {\n operator = _operator;\n rewardFactory = _rewardFactory;\n proxyFactory = _proxyFactory;\n }\n\n function setImplementation(address _v1, address _v2, address _v3) external{\n require(msg.sender == IDeposit(operator).owner(),\"!auth\");\n\n v1Implementation = _v1;\n v2Implementation = _v2;\n v3Implementation = _v3;\n }\n\n //Create a stash contract for the given gauge.\n //function calls are different depending on the version of curve gauges so determine which stash type is needed\n function CreateStash(uint256 _pid, address _gauge, address _staker, uint256 _stashVersion) external returns(address){\n require(msg.sender == operator, \"!authorized\");\n require(_gauge != address(0), \"!gauge\");\n\n if(_stashVersion == uint256(3) && IsV3(_gauge)){\n //v3\n require(v3Implementation!=address(0),\"0 impl\");\n address stash = IProxyFactory(proxyFactory).clone(v3Implementation);\n IStash(stash).initialize(_pid,operator,_staker,_gauge,rewardFactory);\n emit StashCreated(stash, _stashVersion);\n return stash;\n }else if(_stashVersion == uint256(1) && IsV1(_gauge)){\n //v1\n require(v1Implementation!=address(0),\"0 impl\");\n address stash = IProxyFactory(proxyFactory).clone(v1Implementation);\n IStash(stash).initialize(_pid,operator,_staker,_gauge,rewardFactory);\n emit StashCreated(stash, _stashVersion);\n return stash;\n }else if(_stashVersion == uint256(2) && !IsV3(_gauge) && IsV2(_gauge)){\n //v2\n require(v2Implementation!=address(0),\"0 impl\");\n address stash = IProxyFactory(proxyFactory).clone(v2Implementation);\n IStash(stash).initialize(_pid,operator,_staker,_gauge,rewardFactory);\n emit StashCreated(stash, _stashVersion);\n return stash;\n }\n bool isV1 = IsV1(_gauge);\n bool isV2 = IsV2(_gauge);\n bool isV3 = IsV3(_gauge);\n require(!isV1 && !isV2 && !isV3,\"stash version mismatch\");\n return address(0);\n }\n\n function IsV1(address _gauge) private returns(bool){\n bytes memory data = abi.encode(rewarded_token);\n (bool success,) = _gauge.call(data);\n return success;\n }\n\n function IsV2(address _gauge) private returns(bool){\n bytes memory data = abi.encodeWithSelector(reward_tokens,uint256(0));\n (bool success,) = _gauge.call(data);\n return success;\n }\n\n function IsV3(address _gauge) private returns(bool){\n bytes memory data = abi.encodeWithSelector(rewards_receiver,address(0));\n (bool success,) = _gauge.call(data);\n return success;\n }\n}\n"
},
"convex-platform/contracts/contracts/interfaces/IProxyFactory.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\ninterface IProxyFactory {\n function clone(address _target) external returns(address);\n}"
},
"convex-platform/contracts/contracts/RewardHook.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\n\n\n/**\n * @title RewardHook\n * @author ConvexFinance\n * @notice Example Reward hook for stash\n * @dev ExtraRewardStash contracts call this hook if it is set. This hook\n * can be used to pull rewards during a claim. For example pulling\n * rewards from master chef.\n */\ncontract RewardHook{\n using SafeERC20 for IERC20;\n using Address for address;\n using SafeMath for uint256;\n\n\n address public immutable stash;\n address public immutable rewardToken;\n\n\n /**\n * @param _stash Address of the reward stash\n * @param _reward Reward token\n */\n constructor(address _stash, address _reward) public {\n stash = _stash;\n rewardToken = _reward;\n }\n\n\n /**\n * @dev Called when claimRewards is called in ExtraRewardStash can implement\n * logic to pull rewards i.e from a master chef contract. This is just an example\n * and assumes rewards are just sent directly to this hook contract\n */\n function onRewardClaim() external{\n\n //get balance\n uint256 bal = IERC20(rewardToken).balanceOf(address(this));\n\n //send\n IERC20(rewardToken).safeTransfer(stash,bal);\n }\n}\n"
},
"convex-platform/contracts/contracts/VirtualBalanceRewardPool.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n/**\n *Submitted for verification at Etherscan.io on 2020-07-17\n */\n\n/*\n ____ __ __ __ _\n / __/__ __ ___ / /_ / / ___ / /_ (_)__ __\n _\\ \\ / // // _ \\/ __// _ \\/ -_)/ __// / \\ \\ /\n/___/ \\_, //_//_/\\__//_//_/\\__/ \\__//_/ /_\\_\\\n /___/\n\n* Synthetix: VirtualBalanceRewardPool.sol\n*\n* Docs: https://docs.synthetix.io/\n*\n*\n* MIT License\n* ===========\n*\n* Copyright (c) 2020 Synthetix\n*\n* Permission is hereby granted, free of charge, to any person obtaining a copy\n* of this software and associated documentation files (the \"Software\"), to deal\n* in the Software without restriction, including without limitation the rights\n* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n* copies of the Software, and to permit persons to whom the Software is\n* furnished to do so, subject to the following conditions:\n*\n* The above copyright notice and this permission notice shall be included in all\n* copies or substantial portions of the Software.\n*\n* THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n*/\n\nimport \"./Interfaces.sol\";\nimport \"./interfaces/MathUtil.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n\nabstract contract VirtualBalanceWrapper {\n using SafeMath for uint256;\n using SafeERC20 for IERC20;\n\n IDeposit public immutable deposits;\n\n constructor(address deposit_) internal {\n deposits = IDeposit(deposit_);\n }\n\n function totalSupply() public view returns (uint256) {\n return deposits.totalSupply();\n }\n\n function balanceOf(address account) public view returns (uint256) {\n return deposits.balanceOf(account);\n }\n}\n\n/**\n * @title VirtualBalanceRewardPool\n * @author ConvexFinance\n * @notice Reward pool used for ExtraRewards in Booster lockFees (3crv) and\n * Extra reward stashes\n * @dev The rewards are sent to this contract for distribution to stakers. This\n * contract does not hold any of the staking tokens it just maintains a virtual\n * balance of what a user has staked in the staking pool (BaseRewardPool).\n * For example the Booster sends veCRV fees (3Crv) to a VirtualBalanceRewardPool\n * which tracks the virtual balance of cxvCRV stakers and distributes their share\n * of 3Crv rewards\n */\ncontract VirtualBalanceRewardPool is VirtualBalanceWrapper {\n using SafeERC20 for IERC20;\n \n IERC20 public immutable rewardToken;\n uint256 public constant duration = 7 days;\n\n address public immutable operator;\n\n uint256 public periodFinish = 0;\n uint256 public rewardRate = 0;\n uint256 public lastUpdateTime;\n uint256 public rewardPerTokenStored;\n uint256 public queuedRewards = 0;\n uint256 public currentRewards = 0;\n uint256 public historicalRewards = 0;\n uint256 public constant newRewardRatio = 830;\n mapping(address => uint256) public userRewardPerTokenPaid;\n mapping(address => uint256) public rewards;\n\n event RewardAdded(uint256 reward);\n event Staked(address indexed user, uint256 amount);\n event Withdrawn(address indexed user, uint256 amount);\n event RewardPaid(address indexed user, uint256 reward);\n\n /**\n * @param deposit_ Parent deposit pool e.g cvxCRV staking in BaseRewardPool\n * @param reward_ The rewards token e.g 3Crv\n * @param op_ Operator contract (Booster)\n */\n constructor(\n address deposit_,\n address reward_,\n address op_\n ) public VirtualBalanceWrapper(deposit_) {\n rewardToken = IERC20(reward_);\n operator = op_;\n }\n\n\n /**\n * @notice Update rewards earned by this account\n */\n modifier updateReward(address account) {\n rewardPerTokenStored = rewardPerToken();\n lastUpdateTime = lastTimeRewardApplicable();\n if (account != address(0)) {\n rewards[account] = earned(account);\n userRewardPerTokenPaid[account] = rewardPerTokenStored;\n }\n _;\n }\n\n function lastTimeRewardApplicable() public view returns (uint256) {\n return MathUtil.min(block.timestamp, periodFinish);\n }\n\n function rewardPerToken() public view returns (uint256) {\n if (totalSupply() == 0) {\n return rewardPerTokenStored;\n }\n return\n rewardPerTokenStored.add(\n lastTimeRewardApplicable()\n .sub(lastUpdateTime)\n .mul(rewardRate)\n .mul(1e18)\n .div(totalSupply())\n );\n }\n\n function earned(address account) public view returns (uint256) {\n return\n balanceOf(account)\n .mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))\n .div(1e18)\n .add(rewards[account]);\n }\n\n /**\n * @notice Update reward, emit, call linked reward's stake\n * @dev Callable by the deposits address which is the BaseRewardPool\n * this updates the virtual balance of this user as this contract doesn't\n * actually hold any staked tokens it just diributes reward tokens\n */\n function stake(address _account, uint256 amount)\n external\n updateReward(_account)\n {\n require(msg.sender == address(deposits), \"!authorized\");\n // require(amount > 0, 'VirtualDepositRewardPool: Cannot stake 0');\n emit Staked(_account, amount);\n }\n\n /**\n * @notice Withdraw stake and update reward, emit, call linked reward's stake\n * @dev See stake\n */\n function withdraw(address _account, uint256 amount)\n public\n updateReward(_account)\n {\n require(msg.sender == address(deposits), \"!authorized\");\n //require(amount > 0, 'VirtualDepositRewardPool : Cannot withdraw 0');\n\n emit Withdrawn(_account, amount);\n }\n\n /**\n * @notice Get rewards for this account\n * @dev This can be called directly but it is usually called by the\n * BaseRewardPool getReward when the BaseRewardPool loops through\n * it's extraRewards array calling getReward on all of them\n */\n function getReward(address _account) public updateReward(_account){\n uint256 reward = earned(_account);\n if (reward > 0) {\n rewards[_account] = 0;\n rewardToken.safeTransfer(_account, reward);\n emit RewardPaid(_account, reward);\n }\n }\n\n function getReward() external{\n getReward(msg.sender);\n }\n\n function donate(uint256 _amount) external returns(bool){\n IERC20(rewardToken).safeTransferFrom(msg.sender, address(this), _amount);\n queuedRewards = queuedRewards.add(_amount);\n }\n\n function queueNewRewards(uint256 _rewards) external{\n require(msg.sender == operator, \"!authorized\");\n\n _rewards = _rewards.add(queuedRewards);\n\n if (block.timestamp >= periodFinish) {\n notifyRewardAmount(_rewards);\n queuedRewards = 0;\n return;\n }\n\n //et = now - (finish-duration)\n uint256 elapsedTime = block.timestamp.sub(periodFinish.sub(duration));\n //current at now: rewardRate * elapsedTime\n uint256 currentAtNow = rewardRate * elapsedTime;\n uint256 queuedRatio = currentAtNow.mul(1000).div(_rewards);\n if(queuedRatio < newRewardRatio){\n notifyRewardAmount(_rewards);\n queuedRewards = 0;\n }else{\n queuedRewards = _rewards;\n }\n }\n\n function notifyRewardAmount(uint256 reward)\n internal\n updateReward(address(0))\n {\n historicalRewards = historicalRewards.add(reward);\n if (block.timestamp >= periodFinish) {\n rewardRate = reward.div(duration);\n } else {\n uint256 remaining = periodFinish.sub(block.timestamp);\n uint256 leftover = remaining.mul(rewardRate);\n reward = reward.add(leftover);\n rewardRate = reward.div(duration);\n }\n currentRewards = reward;\n lastUpdateTime = block.timestamp;\n periodFinish = block.timestamp.add(duration);\n emit RewardAdded(reward);\n }\n}\n"
},
"convex-platform/contracts/contracts/interfaces/MathUtil.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary MathUtil {\n /**\n * @dev Returns the smallest of two numbers.\n */\n function min(uint256 a, uint256 b) internal pure returns (uint256) {\n return a < b ? a : b;\n }\n}"
},
"convex-platform/contracts/contracts/BaseRewardPool.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n/**\n *Submitted for verification at Etherscan.io on 2020-07-17\n */\n\n/*\n ____ __ __ __ _\n / __/__ __ ___ / /_ / / ___ / /_ (_)__ __\n _\\ \\ / // // _ \\/ __// _ \\/ -_)/ __// / \\ \\ /\n/___/ \\_, //_//_/\\__//_//_/\\__/ \\__//_/ /_\\_\\\n /___/\n\n* Synthetix: BaseRewardPool.sol\n*\n* Docs: https://docs.synthetix.io/\n*\n*\n* MIT License\n* ===========\n*\n* Copyright (c) 2020 Synthetix\n*\n* Permission is hereby granted, free of charge, to any person obtaining a copy\n* of this software and associated documentation files (the \"Software\"), to deal\n* in the Software without restriction, including without limitation the rights\n* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n* copies of the Software, and to permit persons to whom the Software is\n* furnished to do so, subject to the following conditions:\n*\n* The above copyright notice and this permission notice shall be included in all\n* copies or substantial portions of the Software.\n*\n* THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n*/\n\nimport \"./Interfaces.sol\";\nimport \"./interfaces/MathUtil.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n\n/**\n * @title BaseRewardPool\n * @author Synthetix -> ConvexFinance\n * @notice Unipool rewards contract that is re-deployed from rFactory for each staking pool.\n * @dev Changes made here by ConvexFinance are to do with the delayed reward allocation. Curve is queued for\n * rewards and the distribution only begins once the new rewards are sufficiently large, or the epoch\n * has ended. Additionally, enables hooks for `extraRewards` that can be enabled at any point to\n * distribute a child reward token (i.e. a secondary one from Curve, or a seperate one).\n */\ncontract BaseRewardPool {\n using SafeMath for uint256;\n using SafeERC20 for IERC20;\n\n IERC20 public immutable rewardToken;\n IERC20 public immutable stakingToken;\n uint256 public constant duration = 7 days;\n\n address public immutable operator;\n address public immutable rewardManager;\n\n uint256 public immutable pid;\n uint256 public periodFinish = 0;\n uint256 public rewardRate = 0;\n uint256 public lastUpdateTime;\n uint256 public rewardPerTokenStored;\n uint256 public queuedRewards = 0;\n uint256 public currentRewards = 0;\n uint256 public historicalRewards = 0;\n uint256 public constant newRewardRatio = 830;\n uint256 private _totalSupply;\n mapping(address => uint256) public userRewardPerTokenPaid;\n mapping(address => uint256) public rewards;\n mapping(address => uint256) private _balances;\n\n address[] public extraRewards;\n\n event RewardAdded(uint256 reward);\n event Staked(address indexed user, uint256 amount);\n event Withdrawn(address indexed user, uint256 amount);\n event RewardPaid(address indexed user, uint256 reward);\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev This is called directly from RewardFactory\n * @param pid_ Effectively the pool identifier - used in the Booster\n * @param stakingToken_ Pool LP token\n * @param rewardToken_ Crv\n * @param operator_ Booster\n * @param rewardManager_ RewardFactory\n */\n constructor(\n uint256 pid_,\n address stakingToken_,\n address rewardToken_,\n address operator_,\n address rewardManager_\n ) public {\n pid = pid_;\n stakingToken = IERC20(stakingToken_);\n rewardToken = IERC20(rewardToken_);\n operator = operator_;\n rewardManager = rewardManager_;\n }\n\n function totalSupply() public view virtual returns (uint256) {\n return _totalSupply;\n }\n\n function balanceOf(address account) public view virtual returns (uint256) {\n return _balances[account];\n }\n\n function extraRewardsLength() external view returns (uint256) {\n return extraRewards.length;\n }\n\n function addExtraReward(address _reward) external returns(bool){\n require(msg.sender == rewardManager, \"!authorized\");\n require(_reward != address(0),\"!reward setting\");\n \n if(extraRewards.length >= 12){\n return false;\n }\n \n extraRewards.push(_reward);\n return true;\n }\n function clearExtraRewards() external{\n require(msg.sender == rewardManager, \"!authorized\");\n delete extraRewards;\n }\n\n modifier updateReward(address account) {\n rewardPerTokenStored = rewardPerToken();\n lastUpdateTime = lastTimeRewardApplicable();\n if (account != address(0)) {\n rewards[account] = earned(account);\n userRewardPerTokenPaid[account] = rewardPerTokenStored;\n }\n _;\n }\n\n function lastTimeRewardApplicable() public view returns (uint256) {\n return MathUtil.min(block.timestamp, periodFinish);\n }\n\n function rewardPerToken() public view returns (uint256) {\n if (totalSupply() == 0) {\n return rewardPerTokenStored;\n }\n return\n rewardPerTokenStored.add(\n lastTimeRewardApplicable()\n .sub(lastUpdateTime)\n .mul(rewardRate)\n .mul(1e18)\n .div(totalSupply())\n );\n }\n\n function earned(address account) public view returns (uint256) {\n return\n balanceOf(account)\n .mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))\n .div(1e18)\n .add(rewards[account]);\n }\n\n function stake(uint256 _amount)\n public \n returns(bool)\n {\n _processStake(_amount, msg.sender);\n\n stakingToken.safeTransferFrom(msg.sender, address(this), _amount);\n emit Staked(msg.sender, _amount);\n\n return true;\n }\n\n function stakeAll() external returns(bool){\n uint256 balance = stakingToken.balanceOf(msg.sender);\n stake(balance);\n return true;\n }\n\n function stakeFor(address _for, uint256 _amount)\n public\n returns(bool)\n {\n _processStake(_amount, _for);\n\n //take away from sender\n stakingToken.safeTransferFrom(msg.sender, address(this), _amount);\n emit Staked(_for, _amount);\n \n return true;\n }\n\n /**\n * @dev Generic internal staking function that basically does 3 things: update rewards based\n * on previous balance, trigger also on any child contracts, then update balances.\n * @param _amount Units to add to the users balance\n * @param _receiver Address of user who will receive the stake\n */\n function _processStake(uint256 _amount, address _receiver) internal updateReward(_receiver) {\n require(_amount > 0, 'RewardPool : Cannot stake 0');\n \n //also stake to linked rewards\n for(uint i=0; i < extraRewards.length; i++){\n IRewards(extraRewards[i]).stake(_receiver, _amount);\n }\n\n _totalSupply = _totalSupply.add(_amount);\n _balances[_receiver] = _balances[_receiver].add(_amount);\n\n emit Transfer(address(0), _receiver, _amount);\n }\n\n function withdraw(uint256 amount, bool claim)\n public\n updateReward(msg.sender)\n returns(bool)\n {\n require(amount > 0, 'RewardPool : Cannot withdraw 0');\n\n //also withdraw from linked rewards\n for(uint i=0; i < extraRewards.length; i++){\n IRewards(extraRewards[i]).withdraw(msg.sender, amount);\n }\n\n _totalSupply = _totalSupply.sub(amount);\n _balances[msg.sender] = _balances[msg.sender].sub(amount);\n\n stakingToken.safeTransfer(msg.sender, amount);\n emit Withdrawn(msg.sender, amount);\n \n if(claim){\n getReward(msg.sender,true);\n }\n\n emit Transfer(msg.sender, address(0), amount);\n\n return true;\n }\n\n function withdrawAll(bool claim) external{\n withdraw(_balances[msg.sender],claim);\n }\n\n function withdrawAndUnwrap(uint256 amount, bool claim) public returns(bool){\n _withdrawAndUnwrapTo(amount, msg.sender, msg.sender);\n //get rewards too\n if(claim){\n getReward(msg.sender,true);\n }\n return true;\n }\n\n function _withdrawAndUnwrapTo(uint256 amount, address from, address receiver) internal updateReward(from) returns(bool){\n //also withdraw from linked rewards\n for(uint i=0; i < extraRewards.length; i++){\n IRewards(extraRewards[i]).withdraw(from, amount);\n }\n \n _totalSupply = _totalSupply.sub(amount);\n _balances[from] = _balances[from].sub(amount);\n\n //tell operator to withdraw from here directly to user\n IDeposit(operator).withdrawTo(pid,amount,receiver);\n emit Withdrawn(from, amount);\n\n emit Transfer(from, address(0), amount);\n\n return true;\n }\n\n function withdrawAllAndUnwrap(bool claim) external{\n withdrawAndUnwrap(_balances[msg.sender],claim);\n }\n\n /**\n * @dev Gives a staker their rewards, with the option of claiming extra rewards\n * @param _account Account for which to claim\n * @param _claimExtras Get the child rewards too?\n */\n function getReward(address _account, bool _claimExtras) public updateReward(_account) returns(bool){\n uint256 reward = earned(_account);\n if (reward > 0) {\n rewards[_account] = 0;\n rewardToken.safeTransfer(_account, reward);\n IDeposit(operator).rewardClaimed(pid, _account, reward);\n emit RewardPaid(_account, reward);\n }\n\n //also get rewards from linked rewards\n if(_claimExtras){\n for(uint i=0; i < extraRewards.length; i++){\n IRewards(extraRewards[i]).getReward(_account);\n }\n }\n return true;\n }\n\n /**\n * @dev Called by a staker to get their allocated rewards\n */\n function getReward() external returns(bool){\n getReward(msg.sender,true);\n return true;\n }\n\n /**\n * @dev Processes queued rewards in isolation, providing the period has finished.\n * This allows a cheaper way to trigger rewards on low value pools.\n */\n function processIdleRewards() external {\n if (block.timestamp >= periodFinish && queuedRewards > 0) {\n notifyRewardAmount(queuedRewards);\n queuedRewards = 0;\n }\n }\n\n /**\n * @dev Called by the booster to allocate new Crv rewards to this pool\n * Curve is queued for rewards and the distribution only begins once the new rewards are sufficiently\n * large, or the epoch has ended.\n */\n function queueNewRewards(uint256 _rewards) external returns(bool){\n require(msg.sender == operator, \"!authorized\");\n\n _rewards = _rewards.add(queuedRewards);\n\n if (block.timestamp >= periodFinish) {\n notifyRewardAmount(_rewards);\n queuedRewards = 0;\n return true;\n }\n\n //et = now - (finish-duration)\n uint256 elapsedTime = block.timestamp.sub(periodFinish.sub(duration));\n //current at now: rewardRate * elapsedTime\n uint256 currentAtNow = rewardRate * elapsedTime;\n uint256 queuedRatio = currentAtNow.mul(1000).div(_rewards);\n\n //uint256 queuedRatio = currentRewards.mul(1000).div(_rewards);\n if(queuedRatio < newRewardRatio){\n notifyRewardAmount(_rewards);\n queuedRewards = 0;\n }else{\n queuedRewards = _rewards;\n }\n return true;\n }\n\n function notifyRewardAmount(uint256 reward)\n internal\n updateReward(address(0))\n {\n historicalRewards = historicalRewards.add(reward);\n if (block.timestamp >= periodFinish) {\n rewardRate = reward.div(duration);\n } else {\n uint256 remaining = periodFinish.sub(block.timestamp);\n uint256 leftover = remaining.mul(rewardRate);\n reward = reward.add(leftover);\n rewardRate = reward.div(duration);\n }\n currentRewards = reward;\n lastUpdateTime = block.timestamp;\n periodFinish = block.timestamp.add(duration);\n emit RewardAdded(reward);\n }\n}\n"
},
"convex-platform/contracts/contracts/BaseRewardPool4626.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport { BaseRewardPool, IDeposit } from \"./BaseRewardPool.sol\";\nimport { IERC4626, IERC20Metadata } from \"./interfaces/IERC4626.sol\";\nimport { IERC20 } from \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport { ReentrancyGuard } from \"@openzeppelin/contracts-0.6/utils/ReentrancyGuard.sol\";\nimport { SafeERC20 } from \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n/**\n * @title BaseRewardPool4626\n * @notice Simply wraps the BaseRewardPool with the new IERC4626 Vault standard functions.\n * @dev See https://github.com/fei-protocol/ERC4626/blob/main/src/interfaces/IERC4626.sol#L58\n * This is not so much a vault as a Reward Pool, therefore asset:share ratio is always 1:1.\n * To create most utility for this RewardPool, the \"asset\" has been made to be the crvLP token,\n * as opposed to the cvxLP token. Therefore, users can easily deposit crvLP, and it will first\n * go to the Booster and mint the cvxLP before performing the normal staking function.\n */\ncontract BaseRewardPool4626 is BaseRewardPool, ReentrancyGuard, IERC4626 {\n using SafeERC20 for IERC20;\n\n /**\n * @notice The address of the underlying ERC20 token used for\n * the Vault for accounting, depositing, and withdrawing.\n */\n address public override asset;\n\n mapping (address => mapping (address => uint256)) private _allowances;\n\n /**\n * @dev See BaseRewardPool.sol\n */\n constructor(\n uint256 pid_,\n address stakingToken_,\n address rewardToken_,\n address operator_,\n address rewardManager_,\n address lptoken_\n ) public BaseRewardPool(pid_, stakingToken_, rewardToken_, operator_, rewardManager_) {\n asset = lptoken_;\n IERC20(asset).safeApprove(operator_, type(uint256).max);\n }\n\n /**\n * @notice Total amount of the underlying asset that is \"managed\" by Vault.\n */\n function totalAssets() external view virtual override returns(uint256){\n return totalSupply();\n }\n\n /**\n * @notice Mints `shares` Vault shares to `receiver`.\n * @dev Because `asset` is not actually what is collected here, first wrap to required token in the booster.\n */\n function deposit(uint256 assets, address receiver) public virtual override nonReentrant returns (uint256) {\n // Transfer \"asset\" (crvLP) from sender\n IERC20(asset).safeTransferFrom(msg.sender, address(this), assets);\n\n // Convert crvLP to cvxLP through normal booster deposit process, but don't stake\n uint256 balBefore = stakingToken.balanceOf(address(this));\n IDeposit(operator).deposit(pid, assets, false);\n uint256 balAfter = stakingToken.balanceOf(address(this));\n\n require(balAfter.sub(balBefore) >= assets, \"!deposit\");\n\n // Perform stake manually, now that the funds have been received\n _processStake(assets, receiver);\n\n emit Deposit(msg.sender, receiver, assets, assets);\n emit Staked(receiver, assets);\n return assets;\n }\n\n /**\n * @notice Mints exactly `shares` Vault shares to `receiver`\n * by depositing `assets` of underlying tokens.\n */\n function mint(uint256 shares, address receiver) external virtual override returns (uint256) {\n return deposit(shares, receiver);\n }\n\n /**\n * @notice Redeems `shares` from `owner` and sends `assets`\n * of underlying tokens to `receiver`.\n */\n function withdraw(\n uint256 assets,\n address receiver,\n address owner\n ) public virtual override nonReentrant returns (uint256) {\n if (msg.sender != owner) {\n _approve(owner, msg.sender, _allowances[owner][msg.sender].sub(assets, \"ERC4626: withdrawal amount exceeds allowance\"));\n }\n \n _withdrawAndUnwrapTo(assets, owner, receiver);\n\n emit Withdraw(msg.sender, receiver, owner, assets, assets);\n return assets;\n }\n\n /**\n * @notice Redeems `shares` from `owner` and sends `assets`\n * of underlying tokens to `receiver`.\n */\n function redeem(\n uint256 shares,\n address receiver,\n address owner\n ) external virtual override returns (uint256) {\n return withdraw(shares, receiver, owner);\n }\n\n /**\n * @notice The amount of shares that the vault would\n * exchange for the amount of assets provided, in an\n * ideal scenario where all the conditions are met.\n */\n function convertToShares(uint256 assets) public view virtual override returns (uint256) {\n return assets;\n }\n\n /**\n * @notice The amount of assets that the vault would\n * exchange for the amount of shares provided, in an\n * ideal scenario where all the conditions are met.\n */\n function convertToAssets(uint256 shares) public view virtual override returns (uint256) {\n return shares;\n }\n\n /**\n * @notice Total number of underlying assets that can\n * be deposited by `owner` into the Vault, where `owner`\n * corresponds to the input parameter `receiver` of a\n * `deposit` call.\n */\n function maxDeposit(address /* owner */) public view virtual override returns (uint256) {\n return type(uint256).max;\n }\n\n /**\n * @notice Allows an on-chain or off-chain user to simulate\n * the effects of their deposit at the current block, given\n * current on-chain conditions.\n */ \n function previewDeposit(uint256 assets) external view virtual override returns(uint256){\n return convertToShares(assets);\n }\n\n /**\n * @notice Total number of underlying shares that can be minted\n * for `owner`, where `owner` corresponds to the input\n * parameter `receiver` of a `mint` call.\n */\n function maxMint(address owner) external view virtual override returns (uint256) {\n return maxDeposit(owner);\n }\n\n /** \n * @notice Allows an on-chain or off-chain user to simulate\n * the effects of their mint at the current block, given\n * current on-chain conditions.\n */\n function previewMint(uint256 shares) external view virtual override returns(uint256){\n return convertToAssets(shares);\n }\n\n /**\n * @notice Total number of underlying assets that can be\n * withdrawn from the Vault by `owner`, where `owner`\n * corresponds to the input parameter of a `withdraw` call.\n */\n function maxWithdraw(address owner) public view virtual override returns (uint256) {\n return balanceOf(owner);\n }\n\n /** \n * @notice Allows an on-chain or off-chain user to simulate\n * the effects of their withdrawal at the current block,\n * given current on-chain conditions.\n */\n function previewWithdraw(uint256 assets) public view virtual override returns(uint256 shares){\n return convertToShares(assets);\n }\n\n /**\n * @notice Total number of underlying shares that can be\n * redeemed from the Vault by `owner`, where `owner` corresponds\n * to the input parameter of a `redeem` call.\n */\n function maxRedeem(address owner) external view virtual override returns (uint256) {\n return maxWithdraw(owner);\n }\n /** \n * @notice Allows an on-chain or off-chain user to simulate\n * the effects of their redeemption at the current block,\n * given current on-chain conditions.\n */\n function previewRedeem(uint256 shares) external view virtual override returns(uint256){\n return previewWithdraw(shares);\n }\n\n\n /* ========== IERC20 ========== */\n\n /**\n * @dev Returns the name of the token.\n */\n function name() external view override returns (string memory) {\n return string(\n abi.encodePacked(IERC20Metadata(address(stakingToken)).name(), \" Vault\")\n );\n }\n\n /**\n * @dev Returns the symbol of the token.\n */\n function symbol() external view override returns (string memory) {\n return string(\n abi.encodePacked(IERC20Metadata(address(stakingToken)).symbol(), \"-vault\")\n );\n }\n\n /**\n * @dev Returns the decimals places of the token.\n */\n function decimals() external view override returns (uint8) {\n return 18;\n }\n\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() public view override(BaseRewardPool, IERC20) returns (uint256) {\n return BaseRewardPool.totalSupply();\n }\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) public view override(BaseRewardPool, IERC20) returns (uint256) {\n return BaseRewardPool.balanceOf(account);\n }\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `recipient`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address /* recipient */, uint256 /* amount */) external override returns (bool) {\n revert(\"ERC4626: Not supported\");\n }\n\n\n /**\n * @dev See {IERC20-allowance}.\n */\n function allowance(address owner, address spender) public view virtual override returns (uint256) {\n return _allowances[owner][spender];\n }\n\n /**\n * @dev See {IERC20-approve}.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\n _approve(msg.sender, spender, amount);\n return true;\n }\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n */\n function _approve(address owner, address spender, uint256 amount) internal virtual {\n require(owner != address(0), \"ERC4626: approve from the zero address\");\n require(spender != address(0), \"ERC4626: approve to the zero address\");\n\n _allowances[owner][spender] = amount;\n emit Approval(owner, spender, amount);\n }\n\n /**\n * @dev Moves `amount` tokens from `sender` to `recipient` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n */\n function transferFrom(address /* sender */, address /* recipient */, uint256 /* amount */) external override returns (bool) {\n revert(\"ERC4626: Not supported\");\n }\n}"
},
"convex-platform/contracts/contracts/interfaces/IERC4626.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport { IERC20Metadata } from \"./IERC20Metadata.sol\";\n\n/// @title ERC4626 interface\n/// See: https://eips.ethereum.org/EIPS/eip-4626\n\nabstract contract IERC4626 is IERC20Metadata {\n\n /*////////////////////////////////////////////////////////\n Events\n ////////////////////////////////////////////////////////*/\n\n /// @notice `caller` has exchanged `assets` for `shares`, and transferred those `shares` to `owner`\n event Deposit(\n address indexed caller,\n address indexed owner,\n uint256 assets,\n uint256 shares\n );\n\n /// @notice `caller` has exchanged `shares`, owned by `owner`, for\n /// `assets`, and transferred those `assets` to `receiver`.\n event Withdraw(\n address indexed caller,\n address indexed receiver,\n address indexed owner,\n uint256 assets,\n uint256 shares\n );\n\n /*////////////////////////////////////////////////////////\n Vault properties\n ////////////////////////////////////////////////////////*/\n\n /// @notice The address of the underlying ERC20 token used for\n /// the Vault for accounting, depositing, and withdrawing.\n function asset() external view virtual returns(address);\n\n /// @notice Total amount of the underlying asset that\n /// is \"managed\" by Vault.\n function totalAssets() external view virtual returns(uint256);\n\n /*////////////////////////////////////////////////////////\n Deposit/Withdrawal Logic\n ////////////////////////////////////////////////////////*/\n\n /// @notice Mints `shares` Vault shares to `receiver` by\n /// depositing exactly `assets` of underlying tokens.\n function deposit(uint256 assets, address receiver) external virtual returns(uint256 shares);\n\n /// @notice Mints exactly `shares` Vault shares to `receiver`\n /// by depositing `assets` of underlying tokens.\n function mint(uint256 shares, address receiver) external virtual returns(uint256 assets);\n\n /// @notice Redeems `shares` from `owner` and sends `assets`\n /// of underlying tokens to `receiver`.\n function withdraw(uint256 assets, address receiver, address owner) external virtual returns(uint256 shares);\n\n /// @notice Redeems `shares` from `owner` and sends `assets`\n /// of underlying tokens to `receiver`.\n function redeem(uint256 shares, address receiver, address owner) external virtual returns(uint256 assets);\n\n /*////////////////////////////////////////////////////////\n Vault Accounting Logic\n ////////////////////////////////////////////////////////*/\n\n /// @notice The amount of shares that the vault would\n /// exchange for the amount of assets provided, in an\n /// ideal scenario where all the conditions are met.\n function convertToShares(uint256 assets) external view virtual returns(uint256 shares);\n\n /// @notice The amount of assets that the vault would\n /// exchange for the amount of shares provided, in an\n /// ideal scenario where all the conditions are met.\n function convertToAssets(uint256 shares) external view virtual returns(uint256 assets);\n\n /// @notice Total number of underlying assets that can\n /// be deposited by `owner` into the Vault, where `owner`\n /// corresponds to the input parameter `receiver` of a\n /// `deposit` call.\n function maxDeposit(address owner) external view virtual returns(uint256 maxAssets);\n\n /// @notice Allows an on-chain or off-chain user to simulate\n /// the effects of their deposit at the current block, given\n /// current on-chain conditions.\n function previewDeposit(uint256 assets) external view virtual returns(uint256 shares);\n\n /// @notice Total number of underlying shares that can be minted\n /// for `owner`, where `owner` corresponds to the input\n /// parameter `receiver` of a `mint` call.\n function maxMint(address owner) external view virtual returns(uint256 maxShares);\n\n /// @notice Allows an on-chain or off-chain user to simulate\n /// the effects of their mint at the current block, given\n /// current on-chain conditions.\n function previewMint(uint256 shares) external view virtual returns(uint256 assets);\n\n /// @notice Total number of underlying assets that can be\n /// withdrawn from the Vault by `owner`, where `owner`\n /// corresponds to the input parameter of a `withdraw` call.\n function maxWithdraw(address owner) external view virtual returns(uint256 maxAssets);\n\n /// @notice Allows an on-chain or off-chain user to simulate\n /// the effects of their withdrawal at the current block,\n /// given current on-chain conditions.\n function previewWithdraw(uint256 assets) external view virtual returns(uint256 shares);\n\n /// @notice Total number of underlying shares that can be\n /// redeemed from the Vault by `owner`, where `owner` corresponds\n /// to the input parameter of a `redeem` call.\n function maxRedeem(address owner) external view virtual returns(uint256 maxShares);\n\n /// @notice Allows an on-chain or off-chain user to simulate\n /// the effects of their redeemption at the current block,\n /// given current on-chain conditions.\n function previewRedeem(uint256 shares) external view virtual returns(uint256 assets);\n}"
},
"@openzeppelin/contracts-0.6/utils/ReentrancyGuard.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n // Booleans are more expensive than uint256 or any type that takes up a full\n // word because each write operation emits an extra SLOAD to first read the\n // slot's contents, replace the bits taken up by the boolean, and then write\n // back. This is the compiler's defense against contract upgrades and\n // pointer aliasing, and it cannot be disabled.\n\n // The values being non-zero value makes deployment a bit more expensive,\n // but in exchange the refund on every call to nonReentrant will be lower in\n // amount. Since refunds are capped to a percentage of the total\n // transaction's gas, it is best to keep them low in cases like this one, to\n // increase the likelihood of the full refund coming into effect.\n uint256 private constant _NOT_ENTERED = 1;\n uint256 private constant _ENTERED = 2;\n\n uint256 private _status;\n\n constructor () internal {\n _status = _NOT_ENTERED;\n }\n\n /**\n * @dev Prevents a contract from calling itself, directly or indirectly.\n * Calling a `nonReentrant` function from another `nonReentrant`\n * function is not supported. It is possible to prevent this from happening\n * by making the `nonReentrant` function external, and make it call a\n * `private` function that does the actual work.\n */\n modifier nonReentrant() {\n // On the first call to nonReentrant, _notEntered will be true\n require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n // Any calls to nonReentrant after this point will fail\n _status = _ENTERED;\n\n _;\n\n // By storing the original value once again, a refund is triggered (see\n // https://eips.ethereum.org/EIPS/eip-2200)\n _status = _NOT_ENTERED;\n }\n}\n"
},
"convex-platform/contracts/contracts/interfaces/IERC20Metadata.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport { IERC20 } from \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n *\n * _Available since v4.1._\n */\ninterface IERC20Metadata is IERC20 {\n /**\n * @dev Returns the name of the token.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the symbol of the token.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the decimals places of the token.\n */\n function decimals() external view returns (uint8);\n}\n\n"
},
"convex-platform/contracts/contracts/RewardFactory.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"./BaseRewardPool4626.sol\";\nimport \"./VirtualBalanceRewardPool.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n\n/**\n * @title RewardFactory\n * @author ConvexFinance\n * @notice Used to deploy reward pools when a new pool is added to the Booster\n * contract. This contract deploys two types of reward pools:\n * - BaseRewardPool handles CRV rewards for guages\n * - VirtualBalanceRewardPool for extra rewards\n */\ncontract RewardFactory {\n using Address for address;\n\n address public immutable operator;\n address public immutable crv;\n\n mapping (address => bool) private rewardAccess;\n mapping(address => uint256[]) public rewardActiveList;\n\n\n event RewardPoolCreated(address rewardPool, uint256 _pid, address depositToken);\n event TokenRewardPoolCreated(address rewardPool, address token, address mainRewards, address operator);\n\n event AccessChanged(address stash, bool hasAccess);\n\n /**\n * @param _operator Contract operator is Booster\n * @param _crv CRV token address\n */\n constructor(address _operator, address _crv) public {\n operator = _operator;\n crv = _crv;\n }\n\n //stash contracts need access to create new Virtual balance pools for extra gauge incentives(ex. snx)\n function setAccess(address _stash, bool _status) external{\n require(msg.sender == operator, \"!auth\");\n rewardAccess[_stash] = _status;\n\n emit AccessChanged(_stash, _status);\n }\n\n /**\n * @notice Create a Managed Reward Pool to handle distribution of all crv mined in a pool\n */\n function CreateCrvRewards(uint256 _pid, address _depositToken, address _lptoken) external returns (address) {\n require(msg.sender == operator, \"!auth\");\n\n //operator = booster(deposit) contract so that new crv can be added and distributed\n //reward manager = this factory so that extra incentive tokens(ex. snx) can be linked to the main managed reward pool\n BaseRewardPool4626 rewardPool = new BaseRewardPool4626(_pid,_depositToken,crv,operator, address(this), _lptoken);\n\n emit RewardPoolCreated(address(rewardPool), _pid, _depositToken);\n return address(rewardPool);\n }\n\n /**\n * @notice Create a virtual balance reward pool that mimics the balance of a pool's main reward contract\n * used for extra incentive tokens(ex. snx) as well as vecrv fees\n */\n function CreateTokenRewards(address _token, address _mainRewards, address _operator) external returns (address) {\n require(msg.sender == operator || rewardAccess[msg.sender] == true, \"!auth\");\n\n //create new pool, use main pool for balance lookup\n VirtualBalanceRewardPool rewardPool = new VirtualBalanceRewardPool(_mainRewards,_token,_operator);\n address rAddress = address(rewardPool);\n //add the new pool to main pool's list of extra rewards, assuming this factory has \"reward manager\" role\n IRewards(_mainRewards).addExtraReward(rAddress);\n\n emit TokenRewardPoolCreated(rAddress, _token, _mainRewards, _operator);\n //return new pool's address\n return rAddress;\n }\n}\n"
},
"convex-platform/contracts/contracts/PoolManagerV3.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"./interfaces/IGaugeController.sol\";\n\n/** \n * @title PoolManagerV3\n * @author ConvexFinance\n * @notice Pool Manager v3\n * PoolManagerV3 calls addPool on PoolManagerShutdownProxy which calls\n * addPool on PoolManagerProxy which calls addPool on Booster. \n * PoolManager-ception\n * @dev Add pools to the Booster contract\n */\ncontract PoolManagerV3{\n\n address public immutable pools;\n address public immutable gaugeController;\n address public operator;\n\n bool public protectAddPool;\n \n /**\n * @param _pools Currently PoolManagerSecondaryProxy\n * @param _gaugeController Curve gauge controller e.g: (0x2F50D538606Fa9EDD2B11E2446BEb18C9D5846bB)\n * @param _operator Convex multisig\n */\n constructor(\n address _pools, \n address _gaugeController, \n address _operator\n ) public {\n pools = _pools;\n gaugeController = _gaugeController;\n operator = _operator;\n protectAddPool = true;\n }\n\n function setOperator(address _operator) external {\n require(msg.sender == operator, \"!auth\");\n operator = _operator;\n }\n \n /**\n * @notice set if addPool is only callable by operator\n */\n function setProtectPool(bool _protectAddPool) external {\n require(msg.sender == operator, \"!auth\");\n protectAddPool = _protectAddPool;\n }\n\n /**\n * @notice Add a new curve pool to the system. (default stash to v3)\n */\n function addPool(address _gauge) external returns(bool){\n _addPool(_gauge,3);\n return true;\n }\n\n /**\n * @notice Add a new curve pool to the system\n */\n function addPool(address _gauge, uint256 _stashVersion) external returns(bool){\n _addPool(_gauge,_stashVersion);\n return true;\n }\n\n function _addPool(address _gauge, uint256 _stashVersion) internal{\n if(protectAddPool) {\n require(msg.sender == operator, \"!auth\");\n }\n //get lp token from gauge\n address lptoken = ICurveGauge(_gauge).lp_token();\n\n //gauge/lptoken address checks will happen in the next call\n IPools(pools).addPool(lptoken,_gauge,_stashVersion);\n }\n\n function forceAddPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool){\n require(msg.sender==operator, \"!auth\");\n \n //force add pool without weight checks (can only be used on new token and gauge addresses)\n return IPools(pools).forceAddPool(_lptoken, _gauge, _stashVersion);\n }\n\n function shutdownPool(uint256 _pid) external returns(bool){\n require(msg.sender==operator, \"!auth\");\n\n IPools(pools).shutdownPool(_pid);\n return true;\n }\n\n}\n"
},
"convex-platform/contracts/contracts/interfaces/IGaugeController.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity 0.6.12;\n\ninterface IGaugeController {\n function get_gauge_weight(address _gauge) external view returns(uint256);\n function vote_user_slopes(address,address) external view returns(uint256,uint256,uint256);//slope,power,end\n function vote_for_gauge_weights(address,uint256) external;\n function add_gauge(address,int128,uint256) external;\n}"
},
"convex-platform/contracts/contracts/PoolManagerSecondaryProxy.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"./interfaces/IGaugeController.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\n\n/**\n * @title PoolManagerSecondaryProxy\n * @author ConvexFinance\n * @notice Basically a PoolManager that has a better shutdown and calls addPool on PoolManagerProxy. \n * Immutable pool manager proxy to enforce that when a pool is shutdown, the proper number\n * of lp tokens are returned to the booster contract for withdrawal.\n */\ncontract PoolManagerSecondaryProxy{\n using SafeMath for uint256;\n\n address public immutable gaugeController;\n address public immutable pools;\n address public immutable booster;\n address public owner;\n address public operator;\n bool public isShutdown;\n\n mapping(address => bool) public usedMap;\n\n /**\n * @param _gaugeController Curve Gauge controller (0x2F50D538606Fa9EDD2B11E2446BEb18C9D5846bB)\n * @param _pools PoolManagerProxy (0x5F47010F230cE1568BeA53a06eBAF528D05c5c1B)\n * @param _booster Booster\n * @param _owner Executoor\n */\n constructor(\n address _gaugeController,\n address _pools,\n address _booster,\n address _owner\n ) public {\n gaugeController = _gaugeController;\n pools = _pools;\n booster = _booster;\n owner = _owner; \n operator = msg.sender;\n }\n\n modifier onlyOwner() {\n require(owner == msg.sender, \"!owner\");\n _;\n }\n\n modifier onlyOperator() {\n require(operator == msg.sender, \"!op\");\n _;\n }\n\n //set owner - only OWNER\n function setOwner(address _owner) external onlyOwner{\n owner = _owner;\n }\n\n //set operator - only OWNER\n function setOperator(address _operator) external onlyOwner{\n operator = _operator;\n }\n\n //manual set an address to used state\n function setUsedAddress(address[] memory usedList) external onlyOwner{\n for(uint i=0; i < usedList.length; i++){\n usedMap[usedList[i]] = true;\n }\n }\n\n //shutdown pool management and disallow new pools. change is immutable\n function shutdownSystem() external onlyOwner{\n isShutdown = true;\n }\n\n /**\n * @notice Shutdown a pool - only OPERATOR\n * @dev Shutdowns a pool and ensures all the LP tokens are properly\n * withdrawn to the Booster contract \n */\n function shutdownPool(uint256 _pid) external onlyOperator returns(bool){\n //get pool info\n (address lptoken, address depositToken,,,,bool isshutdown) = IPools(booster).poolInfo(_pid);\n require(!isshutdown, \"already shutdown\");\n\n //shutdown pool and get before and after amounts\n uint256 beforeBalance = IERC20(lptoken).balanceOf(booster);\n IPools(pools).shutdownPool(_pid);\n uint256 afterBalance = IERC20(lptoken).balanceOf(booster);\n\n //check that proper amount of tokens were withdrawn(will also fail if already shutdown)\n require( afterBalance.sub(beforeBalance) >= IERC20(depositToken).totalSupply(), \"supply mismatch\");\n\n return true;\n }\n\n //add a new pool if it has weight on the gauge controller - only OPERATOR\n function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external onlyOperator returns(bool){\n //check that the pool as weight\n uint256 weight = IGaugeController(gaugeController).get_gauge_weight(_gauge);\n require(weight > 0, \"must have weight\");\n\n return _addPool(_lptoken, _gauge, _stashVersion);\n }\n\n //force add a new pool, but only for addresses that have never been used before - only OPERATOR\n function forceAddPool(address _lptoken, address _gauge, uint256 _stashVersion) external onlyOperator returns(bool){\n require(!usedMap[_lptoken] && !usedMap[_gauge], \"cant force used pool\");\n\n return _addPool(_lptoken, _gauge, _stashVersion);\n }\n\n //internal add pool and updated used list\n function _addPool(address _lptoken, address _gauge, uint256 _stashVersion) internal returns(bool){\n require(!isShutdown, \"shutdown\");\n\n usedMap[_lptoken] = true;\n usedMap[_gauge] = true;\n\n return IPools(pools).addPool(_lptoken,_gauge,_stashVersion);\n }\n}\n"
},
"convex-platform/contracts/contracts/PoolManagerProxy.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\n\n/**\n * @title PoolManagerProxy\n * @author ConvexFinance\n * @notice Immutable pool manager proxy to enforce that there are no multiple pools of the same gauge\n * as well as new lp tokens are not gauge tokens\n * @dev Called by PoolManagerShutdownProxy \n */\ncontract PoolManagerProxy{\n\n address public immutable pools;\n address public owner;\n address public operator;\n\n /**\n * @param _pools Contract can call addPool currently Booster\n * @param _owner Contract owner currently multisig\n */\n constructor(\n address _pools, \n address _owner\n ) public {\n pools = _pools;\n owner = _owner;\n operator = msg.sender;\n }\n\n modifier onlyOwner() {\n require(owner == msg.sender, \"!owner\");\n _;\n }\n\n modifier onlyOperator() {\n require(operator == msg.sender, \"!op\");\n _;\n }\n\n //set owner - only OWNER\n function setOwner(address _owner) external onlyOwner{\n owner = _owner;\n }\n\n //set operator - only OWNER\n function setOperator(address _operator) external onlyOwner{\n operator = _operator;\n }\n\n // sealed to be immutable\n // function revertControl() external{\n // }\n\n //shutdown a pool - only OPERATOR\n function shutdownPool(uint256 _pid) external onlyOperator returns(bool){\n return IPools(pools).shutdownPool(_pid);\n }\n\n /**\n * @notice Add pool to system\n * @dev Only callable by the operator looks up the gauge from the gaugeMap in Booster to ensure\n * it hasn't already been added\n */\n function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external onlyOperator returns(bool){\n\n require(_gauge != address(0),\"gauge is 0\");\n require(_lptoken != address(0),\"lp token is 0\");\n\n //check if a pool with this gauge already exists\n bool gaugeExists = IPools(pools).gaugeMap(_gauge);\n require(!gaugeExists, \"already registered gauge\");\n\n //must also check that the lp token is not a registered gauge\n //because curve gauges are tokenized\n gaugeExists = IPools(pools).gaugeMap(_lptoken);\n require(!gaugeExists, \"already registered lptoken\");\n\n return IPools(pools).addPool(_lptoken,_gauge,_stashVersion);\n }\n}\n"
},
"convex-platform/contracts/contracts/ExtraRewardStashV3.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"./interfaces/IRewardHook.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n\n/**\n * @title ExtraRewardStashV3\n * @author ConvexFinance\n * @notice ExtraRewardStash for pools added to the Booster to handle extra rewards\n * that aren't CRV that can be claimed from a gauge.\n * - v3.0: Support for curve gauge reward redirect\n * The Booster contract has a function called setGaugeRedirect. This function calls set_rewards_receiver\n * On the Curve Guage. This tells the Gauge where to send rewards. The Booster crafts the calldata for this\n * transaction and then calls execute on the VoterProxy which executes this transaction on the Curve Gauge\n * - v3.1: Support for arbitrary token rewards outside of gauge rewards add \n * reward hook to pull rewards during claims\n * - v3.2: Move constuctor to init function for proxy creation\n */\ncontract ExtraRewardStashV3 {\n using SafeERC20 for IERC20;\n using Address for address;\n using SafeMath for uint256;\n\n address public immutable crv;\n uint256 private constant maxRewards = 8;\n\n uint256 public pid;\n address public operator;\n address public staker;\n address public gauge;\n address public rewardFactory;\n \n mapping(address => uint256) public historicalRewards;\n bool public hasRedirected;\n bool public hasCurveRewards;\n\n struct TokenInfo {\n address token;\n address rewardAddress;\n }\n\n //use mapping+array so that we dont have to loop check each time setToken is called\n mapping(address => TokenInfo) public tokenInfo;\n address[] public tokenList;\n\n //address to call for reward pulls\n address public rewardHook;\n \n /**\n * @param _crv CRV token address\n */\n constructor(address _crv) public {\n crv = _crv;\n }\n\n /**\n * @param _pid Pool ID\n * @param _operator Operator (Booster)\n * @param _staker Staker (VoterProxy)\n * @param _gauge Gauge\n * @param _rFactory Reward factory\n */\n function initialize(uint256 _pid, address _operator, address _staker, address _gauge, address _rFactory) external {\n require(gauge == address(0),\"!init\");\n pid = _pid;\n operator = _operator;\n staker = _staker;\n gauge = _gauge;\n rewardFactory = _rFactory;\n }\n\n function getName() external pure returns (string memory) {\n return \"ExtraRewardStashV3.2\";\n }\n\n function tokenCount() external view returns (uint256){\n return tokenList.length;\n }\n\n /**\n * @notice Claim rewards from the gauge\n * @dev The Stash's claimRewards function calls claimRewards on the Booster contract\n * which calls claimRewards on the VoterProxy which calls claim_rewards on the gauge\n * If a RewardHook is set onRewardClaim is also called on that\n * Called by Booster earmarkRewards\n * Guage rewards are sent directly to this stash even though the Curve method claim_rewards\n * is being called by the VoterProxy. This is because Curves guages have the ability to redirect\n * rewards to somewhere other than msg.sender. This is setup in Booster setGaugeRedirect\n */\n function claimRewards() external returns (bool) {\n require(msg.sender == operator, \"!operator\");\n\n //this is updateable from v2 gauges now so must check each time.\n checkForNewRewardTokens();\n\n //make sure we're redirected\n if(!hasRedirected){\n IDeposit(operator).setGaugeRedirect(pid);\n hasRedirected = true;\n }\n\n if(hasCurveRewards){\n //claim rewards on gauge for staker\n //using reward_receiver so all rewards will be moved to this stash\n IDeposit(operator).claimRewards(pid,gauge);\n }\n\n //hook for reward pulls\n if(rewardHook != address(0)){\n try IRewardHook(rewardHook).onRewardClaim(){\n }catch{}\n }\n return true;\n }\n \n\n //check if gauge rewards have changed\n function checkForNewRewardTokens() internal {\n for(uint256 i = 0; i < maxRewards; i++){\n address token = ICurveGauge(gauge).reward_tokens(i);\n if (token == address(0)) {\n break;\n }\n if(!hasCurveRewards){\n hasCurveRewards = true;\n }\n setToken(token);\n }\n }\n\n //register an extra reward token to be handled\n // (any new incentive that is not directly on curve gauges)\n function setExtraReward(address _token) external{\n //owner of booster can set extra rewards\n require(IDeposit(operator).owner() == msg.sender, \"!owner\");\n require(tokenList.length < 4, \"too many rewards\");\n\n setToken(_token);\n }\n\n function setRewardHook(address _hook) external{\n //owner of booster can set reward hook\n require(IDeposit(operator).owner() == msg.sender, \"!owner\");\n rewardHook = _hook;\n }\n\n\n /**\n * @notice Add a reward token to the token list so it can be claimed\n * @dev For each token that is added as a claimable reward a VirtualRewardsPool\n * is deployed to handle virtual distribution of tokens \n */\n function setToken(address _token) internal {\n TokenInfo storage t = tokenInfo[_token];\n\n if(t.token == address(0) && _token != crv){\n //set token address\n t.token = _token;\n\n // we only want to add rewards that are not CRV\n //create new reward contract (for NON-crv tokens only)\n (,,,address mainRewardContract,,) = IDeposit(operator).poolInfo(pid);\n address rewardContract = IRewardFactory(rewardFactory).CreateTokenRewards(\n _token,\n mainRewardContract,\n address(this));\n \n t.rewardAddress = rewardContract;\n\n //add token to list of known rewards\n tokenList.push(_token);\n }\n }\n\n //pull assigned tokens from staker to stash\n function stashRewards() external pure returns(bool){\n\n //after depositing/withdrawing, extra incentive tokens are claimed\n //but from v3 this is default to off, and this stash is the reward receiver too.\n\n return true;\n }\n\n /**\n * @notice Distribute rewards\n * @dev Send all extra token rewards to the rewardContract VirtualRewardsPool\n * Called by Booster earmarkRewards\n */\n function processStash() external returns(bool){\n require(msg.sender == operator, \"!operator\");\n\n uint256 tCount = tokenList.length;\n for(uint i=0; i < tCount; i++){\n TokenInfo storage t = tokenInfo[tokenList[i]];\n address token = t.token;\n if(token == address(0)) continue;\n \n uint256 amount = IERC20(token).balanceOf(address(this));\n if (amount > 0) {\n historicalRewards[token] = historicalRewards[token].add(amount);\n \t//add to reward contract\n \taddress rewards = t.rewardAddress;\n \tif(rewards == address(0)) continue;\n \tIERC20(token).safeTransfer(rewards, amount);\n \tIRewards(rewards).queueNewRewards(amount);\n }\n }\n return true;\n }\n\n}\n"
},
"convex-platform/contracts/contracts/interfaces/IRewardHook.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity 0.6.12;\n\ninterface IRewardHook {\n function onRewardClaim() external;\n}"
},
"@openzeppelin/contracts-0.6/access/Ownable.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.6.0 <0.8.0;\n\nimport \"../utils/Context.sol\";\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n constructor () internal {\n address msgSender = _msgSender();\n _owner = msgSender;\n emit OwnershipTransferred(address(0), msgSender);\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions anymore. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby removing any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n emit OwnershipTransferred(_owner, address(0));\n _owner = address(0);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n emit OwnershipTransferred(_owner, newOwner);\n _owner = newOwner;\n }\n}\n"
},
"convex-platform/contracts/contracts/ConvexMasterChef.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity 0.6.12;\n\nimport { ReentrancyGuard } from \"@openzeppelin/contracts-0.6/utils/ReentrancyGuard.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Context.sol\";\nimport \"@openzeppelin/contracts-0.6/access/Ownable.sol\";\nimport \"./interfaces/IRewarder.sol\";\n\n/**\n * @title ConvexMasterChef\n * @author ConvexFinance\n * @notice Masterchef can distribute rewards to n pools over x time\n * @dev There are some caveats with this usage - once it's turned on it can't be turned off,\n * and thus it can over complicate the distribution of these rewards.\n * To kick things off, just transfer CVX here and add some pools - rewards will be distributed\n * pro-rata based on the allocation points in each pool vs the total alloc.\n */\ncontract ConvexMasterChef is Ownable, ReentrancyGuard {\n using SafeMath for uint256;\n using SafeERC20 for IERC20;\n\n // Info of each user.\n struct UserInfo {\n uint256 amount; // How many LP tokens the user has provided.\n uint256 rewardDebt; // Reward debt. See explanation below.\n //\n // We do some fancy math here. Basically, any point in time, the amount of CVXs\n // entitled to a user but is pending to be distributed is:\n //\n // pending reward = (user.amount * pool.accCvxPerShare) - user.rewardDebt\n //\n // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:\n // 1. The pool's `accCvxPerShare` (and `lastRewardBlock`) gets updated.\n // 2. User receives the pending reward sent to his/her address.\n // 3. User's `amount` gets updated.\n // 4. User's `rewardDebt` gets updated.\n }\n\n // Info of each pool.\n struct PoolInfo {\n IERC20 lpToken; // Address of LP token contract.\n uint256 allocPoint; // How many allocation points assigned to this pool. CVX to distribute per block.\n uint256 lastRewardBlock; // Last block number that CVXs distribution occurs.\n uint256 accCvxPerShare; // Accumulated CVXs per share, times 1e12. See below.\n IRewarder rewarder;\n }\n\n //cvx\n IERC20 public immutable cvx;\n // CVX tokens created per block.\n uint256 public immutable rewardPerBlock;\n // Bonus muliplier for early cvx makers.\n uint256 public constant BONUS_MULTIPLIER = 2;\n\n // Info of each pool.\n PoolInfo[] public poolInfo;\n mapping(address => bool) public isAddedPool;\n // Info of each user that stakes LP tokens.\n mapping(uint256 => mapping(address => UserInfo)) public userInfo;\n // Total allocation points. Must be the sum of all allocation points in all pools.\n uint256 public totalAllocPoint = 0;\n // The block number when CVX mining starts.\n uint256 public immutable startBlock;\n uint256 public immutable endBlock;\n\n // Events\n event Deposit(address indexed user, uint256 indexed pid, uint256 amount);\n event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);\n event RewardPaid(address indexed user, uint256 indexed pid, uint256 amount);\n event EmergencyWithdraw(\n address indexed user,\n uint256 indexed pid,\n uint256 amount\n );\n\n constructor(\n IERC20 _cvx,\n uint256 _rewardPerBlock,\n uint256 _startBlock,\n uint256 _endBlock\n ) public {\n cvx = _cvx;\n isAddedPool[address(_cvx)] = true;\n rewardPerBlock = _rewardPerBlock;\n startBlock = _startBlock;\n endBlock = _endBlock;\n }\n\n function poolLength() external view returns (uint256) {\n return poolInfo.length;\n }\n\n // Add a new lp to the pool. Can only be called by the owner.\n // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.\n function add(\n uint256 _allocPoint,\n IERC20 _lpToken,\n IRewarder _rewarder\n ) public onlyOwner nonReentrant {\n require(poolInfo.length < 32, \"max pools\");\n\n require(!isAddedPool[address(_lpToken)], \"add: Duplicated LP Token\");\n isAddedPool[address(_lpToken)] = true;\n\n massUpdatePools();\n\n uint256 lastRewardBlock = block.number > startBlock\n ? block.number\n : startBlock;\n totalAllocPoint = totalAllocPoint.add(_allocPoint);\n poolInfo.push(\n PoolInfo({\n lpToken: _lpToken,\n allocPoint: _allocPoint,\n lastRewardBlock: lastRewardBlock,\n accCvxPerShare: 0,\n rewarder: _rewarder\n })\n );\n }\n\n // Update the given pool's CVX allocation point. Can only be called by the owner.\n function set(\n uint256 _pid,\n uint256 _allocPoint,\n IRewarder _rewarder,\n bool _updateRewarder\n ) public onlyOwner nonReentrant {\n massUpdatePools();\n\n totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(\n _allocPoint\n );\n require(totalAllocPoint > 0, \"!alloc\");\n\n poolInfo[_pid].allocPoint = _allocPoint;\n if(_updateRewarder){\n poolInfo[_pid].rewarder = _rewarder;\n }\n }\n\n // Return reward multiplier over the given _from to _to block.\n function getMultiplier(uint256 _from, uint256 _to)\n public\n view\n returns (uint256)\n {\n uint256 clampedTo = _to > endBlock ? endBlock : _to;\n uint256 clampedFrom = _from > endBlock ? endBlock : _from;\n return clampedTo.sub(clampedFrom);\n }\n\n // View function to see pending CVXs on frontend.\n function pendingCvx(uint256 _pid, address _user)\n external\n view\n returns (uint256)\n {\n PoolInfo storage pool = poolInfo[_pid];\n UserInfo storage user = userInfo[_pid][_user];\n uint256 accCvxPerShare = pool.accCvxPerShare;\n uint256 lpSupply = pool.lpToken.balanceOf(address(this));\n if (block.number > pool.lastRewardBlock && lpSupply != 0) {\n uint256 multiplier = getMultiplier(\n pool.lastRewardBlock,\n block.number\n );\n uint256 cvxReward = multiplier\n .mul(rewardPerBlock)\n .mul(pool.allocPoint)\n .div(totalAllocPoint);\n accCvxPerShare = accCvxPerShare.add(\n cvxReward.mul(1e12).div(lpSupply)\n );\n }\n return user.amount.mul(accCvxPerShare).div(1e12).sub(user.rewardDebt);\n }\n\n // Update reward vairables for all pools. Be careful of gas spending!\n function massUpdatePools() public {\n uint256 length = poolInfo.length;\n for (uint256 pid = 0; pid < length; ++pid) {\n updatePool(pid);\n }\n }\n\n // Update reward variables of the given pool to be up-to-date.\n function updatePool(uint256 _pid) public {\n PoolInfo storage pool = poolInfo[_pid];\n if (block.number <= pool.lastRewardBlock) {\n return;\n }\n uint256 lpSupply = pool.lpToken.balanceOf(address(this));\n if (lpSupply == 0) {\n pool.lastRewardBlock = block.number;\n return;\n }\n uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);\n uint256 cvxReward = multiplier\n .mul(rewardPerBlock)\n .mul(pool.allocPoint)\n .div(totalAllocPoint);\n //cvx.mint(address(this), cvxReward);\n pool.accCvxPerShare = pool.accCvxPerShare.add(\n cvxReward.mul(1e12).div(lpSupply)\n );\n pool.lastRewardBlock = block.number;\n }\n\n // Deposit LP tokens to MasterChef for CVX allocation.\n function deposit(uint256 _pid, uint256 _amount) public nonReentrant {\n PoolInfo storage pool = poolInfo[_pid];\n UserInfo storage user = userInfo[_pid][msg.sender];\n updatePool(_pid);\n if (user.amount > 0) {\n uint256 pending = user\n .amount\n .mul(pool.accCvxPerShare)\n .div(1e12)\n .sub(user.rewardDebt);\n safeRewardTransfer(msg.sender, pending);\n }\n pool.lpToken.safeTransferFrom(\n address(msg.sender),\n address(this),\n _amount\n );\n user.amount = user.amount.add(_amount);\n user.rewardDebt = user.amount.mul(pool.accCvxPerShare).div(1e12);\n\n //extra rewards\n IRewarder _rewarder = pool.rewarder;\n if (address(_rewarder) != address(0)) {\n _rewarder.onReward(_pid, msg.sender, msg.sender, 0, user.amount);\n }\n\n emit Deposit(msg.sender, _pid, _amount);\n }\n\n // Withdraw LP tokens from MasterChef.\n function withdraw(uint256 _pid, uint256 _amount) public nonReentrant {\n PoolInfo storage pool = poolInfo[_pid];\n UserInfo storage user = userInfo[_pid][msg.sender];\n require(user.amount >= _amount, \"withdraw: not good\");\n updatePool(_pid);\n uint256 pending = user.amount.mul(pool.accCvxPerShare).div(1e12).sub(\n user.rewardDebt\n );\n safeRewardTransfer(msg.sender, pending);\n user.amount = user.amount.sub(_amount);\n user.rewardDebt = user.amount.mul(pool.accCvxPerShare).div(1e12);\n pool.lpToken.safeTransfer(address(msg.sender), _amount);\n\n //extra rewards\n IRewarder _rewarder = pool.rewarder;\n if (address(_rewarder) != address(0)) {\n _rewarder.onReward(_pid, msg.sender, msg.sender, pending, user.amount);\n }\n\n emit RewardPaid(msg.sender, _pid, pending);\n emit Withdraw(msg.sender, _pid, _amount);\n }\n\n function claim(uint256 _pid, address _account) external nonReentrant {\n PoolInfo storage pool = poolInfo[_pid];\n UserInfo storage user = userInfo[_pid][_account];\n\n updatePool(_pid);\n uint256 pending = user.amount.mul(pool.accCvxPerShare).div(1e12).sub(\n user.rewardDebt\n );\n safeRewardTransfer(_account, pending);\n user.rewardDebt = user.amount.mul(pool.accCvxPerShare).div(1e12);\n\n //extra rewards\n IRewarder _rewarder = pool.rewarder;\n if (address(_rewarder) != address(0)) {\n _rewarder.onReward(_pid, _account, _account, pending, user.amount);\n }\n\n emit RewardPaid(_account, _pid, pending);\n }\n\n // Withdraw without caring about rewards. EMERGENCY ONLY.\n function emergencyWithdraw(uint256 _pid) public nonReentrant {\n PoolInfo storage pool = poolInfo[_pid];\n UserInfo storage user = userInfo[_pid][msg.sender];\n pool.lpToken.safeTransfer(address(msg.sender), user.amount);\n emit EmergencyWithdraw(msg.sender, _pid, user.amount);\n user.amount = 0;\n user.rewardDebt = 0;\n\n //extra rewards\n IRewarder _rewarder = pool.rewarder;\n if (address(_rewarder) != address(0)) {\n _rewarder.onReward(_pid, msg.sender, msg.sender, 0, 0);\n }\n }\n\n // Safe cvx transfer function, just in case if rounding error causes pool to not have enough CVXs.\n function safeRewardTransfer(address _to, uint256 _amount) internal {\n uint256 cvxBal = cvx.balanceOf(address(this));\n if (_amount > cvxBal) {\n cvx.safeTransfer(_to, cvxBal);\n } else {\n cvx.safeTransfer(_to, _amount);\n }\n }\n\n}"
},
"convex-platform/contracts/contracts/interfaces/IRewarder.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity 0.6.12;\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\ninterface IRewarder {\n using SafeERC20 for IERC20;\n function onReward(uint256 pid, address user, address recipient, uint256 sushiAmount, uint256 newLpAmount) external;\n function pendingTokens(uint256 pid, address user, uint256 sushiAmount) external view returns (IERC20[] memory, uint256[] memory);\n}"
},
"convex-platform/contracts/contracts/Booster.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/ReentrancyGuard.sol\";\n\n/**\n * @title Booster\n * @author ConvexFinance\n * @notice Main deposit contract; keeps track of pool info & user deposits; distributes rewards.\n * @dev They say all paths lead to Rome, and the cvxBooster is no different. This is where it all goes down.\n * It is responsible for tracking all the pools, it collects rewards from all pools and redirects it.\n */\ncontract Booster is ReentrancyGuard {\n using SafeERC20 for IERC20;\n using Address for address;\n using SafeMath for uint256;\n\n address public immutable crv;\n address public immutable voteOwnership;\n address public immutable voteParameter;\n\n uint256 public lockIncentive = 825; //incentive to crv stakers\n uint256 public stakerIncentive = 825; //incentive to native token stakers\n uint256 public earmarkIncentive = 50; //incentive to users who spend gas to make calls\n uint256 public platformFee = 0; //possible fee to build treasury\n uint256 public constant MaxFees = 4000;\n uint256 public constant FEE_DENOMINATOR = 10000;\n\n address public owner;\n address public feeManager;\n address public poolManager;\n address public immutable staker;\n address public immutable minter;\n address public rewardFactory;\n address public stashFactory;\n address public tokenFactory;\n address public rewardArbitrator;\n address public voteDelegate;\n address public treasury;\n address public stakerRewards; //cvx rewards\n address public lockRewards; //cvxCrv rewards(crv)\n address public bridgeDelegate;\n mapping(uint256 => uint256) public l2FeesHistory;\n uint256 immutable epochLength = 1 weeks;\n\n mapping(address => FeeDistro) public feeTokens;\n struct FeeDistro {\n address distro;\n address rewards;\n bool active;\n }\n\n bool public isShutdown;\n\n struct PoolInfo {\n address lptoken;\n address token;\n address gauge;\n address crvRewards;\n address stash;\n bool shutdown;\n }\n\n //index(pid) -> pool\n PoolInfo[] public poolInfo;\n mapping(address => bool) public gaugeMap;\n\n // Reward multiplier for increasing or decreasing AURA rewards per PID\n uint256 public constant REWARD_MULTIPLIER_DENOMINATOR = 10000;\n // rewardContract => rewardMultiplier (10000 = 100%)\n mapping(address => uint256) public getRewardMultipliers;\n\n event Deposited(address indexed user, uint256 indexed poolid, uint256 amount);\n event Withdrawn(address indexed user, uint256 indexed poolid, uint256 amount);\n\n event PoolAdded(address lpToken, address gauge, address token, address rewardPool, address stash, uint256 pid);\n event PoolShutdown(uint256 poolId);\n\n event OwnerUpdated(address newOwner);\n event FeeManagerUpdated(address newFeeManager);\n event PoolManagerUpdated(address newPoolManager);\n event FactoriesUpdated(address rewardFactory, address stashFactory, address tokenFactory);\n event ArbitratorUpdated(address newArbitrator);\n event VoteDelegateUpdated(address newVoteDelegate);\n event RewardContractsUpdated(address lockRewards, address stakerRewards);\n event FeesUpdated(uint256 lockIncentive, uint256 stakerIncentive, uint256 earmarkIncentive, uint256 platformFee);\n event TreasuryUpdated(address newTreasury);\n event FeeInfoUpdated(address feeDistro, address lockFees, address feeToken);\n event FeeInfoChanged(address feeDistro, bool active);\n\n /**\n * @dev Constructor doing what constructors do. It is noteworthy that\n * a lot of basic config is set to 0 - expecting subsequent calls to setFeeInfo etc.\n * @param _staker VoterProxy (locks the crv and adds to all gauges)\n * @param _minter CVX token, or the thing that mints it\n * @param _crv CRV\n * @param _voteOwnership Address of the Curve DAO responsible for ownership stuff\n * @param _voteParameter Address of the Curve DAO responsible for param updates\n */\n constructor(\n address _staker,\n address _minter,\n address _crv,\n address _voteOwnership,\n address _voteParameter\n ) public {\n staker = _staker;\n minter = _minter;\n crv = _crv;\n voteOwnership = _voteOwnership;\n voteParameter = _voteParameter;\n isShutdown = false;\n\n owner = msg.sender;\n voteDelegate = msg.sender;\n feeManager = msg.sender;\n poolManager = msg.sender;\n treasury = address(0);\n\n emit OwnerUpdated(msg.sender);\n emit VoteDelegateUpdated(msg.sender);\n emit FeeManagerUpdated(msg.sender);\n emit PoolManagerUpdated(msg.sender);\n }\n\n\n /// SETTER SECTION ///\n\n /**\n * @notice Owner is responsible for setting initial config, updating vote delegate and shutting system\n */\n function setOwner(address _owner) external {\n require(msg.sender == owner, \"!auth\");\n owner = _owner;\n\n emit OwnerUpdated(_owner);\n }\n\n /**\n * @notice Fee Manager can update the fees (lockIncentive, stakeIncentive, earmarkIncentive, platformFee)\n */\n function setFeeManager(address _feeM) external {\n require(msg.sender == owner, \"!auth\");\n feeManager = _feeM;\n\n emit FeeManagerUpdated(_feeM);\n }\n\n /**\n * @notice Pool manager is responsible for adding new pools\n */\n function setPoolManager(address _poolM) external {\n require(msg.sender == poolManager, \"!auth\");\n poolManager = _poolM;\n\n emit PoolManagerUpdated(_poolM);\n }\n\n /**\n * @notice Factories are used when deploying new pools. Only the stash factory is mutable after init\n */\n function setFactories(address _rfactory, address _sfactory, address _tfactory) external {\n require(msg.sender == owner, \"!auth\");\n\n //stash factory should be considered more safe to change\n //updating may be required to handle new types of gauges\n stashFactory = _sfactory;\n\n //reward factory only allow this to be called once even if owner\n //removes ability to inject malicious staking contracts\n //token factory can also be immutable\n if(rewardFactory == address(0)){\n rewardFactory = _rfactory;\n tokenFactory = _tfactory;\n\n emit FactoriesUpdated(_rfactory, _sfactory, _tfactory);\n } else {\n emit FactoriesUpdated(address(0), _sfactory, address(0));\n }\n }\n\n /**\n * @notice Arbitrator handles tokens that are used as secondary rewards across multiple pools\n */\n function setArbitrator(address _arb) external {\n require(msg.sender==owner, \"!auth\");\n rewardArbitrator = _arb;\n\n emit ArbitratorUpdated(_arb);\n }\n\n /**\n * @notice Vote Delegate has the rights to cast votes on the VoterProxy via the Booster\n */\n function setVoteDelegate(address _voteDelegate) external {\n require(msg.sender==owner, \"!auth\");\n voteDelegate = _voteDelegate;\n\n emit VoteDelegateUpdated(_voteDelegate);\n }\n\n /**\n * @notice Only called once, to set the addresses of cvxCrv (lockRewards) and cvx staking (stakerRewards)\n */\n function setRewardContracts(address _rewards, address _stakerRewards) external {\n require(msg.sender == owner, \"!auth\");\n \n //reward contracts are immutable or else the owner\n //has a means to redeploy and mint cvx via rewardClaimed()\n if(lockRewards == address(0)){\n lockRewards = _rewards;\n stakerRewards = _stakerRewards;\n getRewardMultipliers[lockRewards] = REWARD_MULTIPLIER_DENOMINATOR;\n emit RewardContractsUpdated(_rewards, _stakerRewards);\n }\n }\n\n /**\n * @notice Set reward token and claim contract\n * @dev This creates a secondary (VirtualRewardsPool) rewards contract for the vcxCrv staking contract\n */\n function setFeeInfo(address _feeToken, address _feeDistro) external nonReentrant {\n require(msg.sender == owner, \"!auth\");\n require(!isShutdown, \"shutdown\");\n require(lockRewards != address(0) && rewardFactory != address(0), \"!initialised\");\n\n require(_feeToken != address(0) && _feeDistro != address(0), \"!addresses\");\n require(IFeeDistributor(_feeDistro).getTokenTimeCursor(_feeToken) > 0, \"!distro\");\n\n if(feeTokens[_feeToken].distro == address(0)){\n require(!gaugeMap[_feeToken], \"!token\");\n\n // Distributed directly\n if(_feeToken == crv){\n feeTokens[crv] = FeeDistro({\n distro: _feeDistro,\n rewards: lockRewards,\n active: true\n });\n emit FeeInfoUpdated(_feeDistro, lockRewards, crv);\n } else {\n //create a new reward contract for the new token\n require(IRewards(lockRewards).extraRewardsLength() < 10, \"too many rewards\");\n address rewards = IRewardFactory(rewardFactory).CreateTokenRewards(_feeToken, lockRewards, address(this));\n feeTokens[_feeToken] = FeeDistro({\n distro: _feeDistro,\n rewards: rewards,\n active: true\n });\n emit FeeInfoUpdated(_feeDistro, rewards, _feeToken);\n }\n } else {\n feeTokens[_feeToken].distro = _feeDistro;\n emit FeeInfoUpdated(_feeDistro, address(0), _feeToken);\n }\n }\n\n /**\n * @notice Allows turning off or on for fee distro\n */\n function updateFeeInfo(address _feeToken, bool _active) external {\n require(msg.sender==owner, \"!auth\");\n\n require(feeTokens[_feeToken].distro != address(0), \"Fee doesn't exist\");\n\n feeTokens[_feeToken].active = _active;\n\n emit FeeInfoChanged(_feeToken, _active);\n }\n\n /**\n * @notice Fee manager can set all the relevant fees\n * @param _lockFees % for cvxCrv stakers where 1% == 100\n * @param _stakerFees % for CVX stakers where 1% == 100\n * @param _callerFees % for whoever calls the claim where 1% == 100\n * @param _platform % for \"treasury\" or vlCVX where 1% == 100\n */\n function setFees(uint256 _lockFees, uint256 _stakerFees, uint256 _callerFees, uint256 _platform) external nonReentrant{\n require(msg.sender==feeManager, \"!auth\");\n\n uint256 total = _lockFees.add(_stakerFees).add(_callerFees).add(_platform);\n require(total <= MaxFees, \">MaxFees\");\n\n require(_lockFees >= 300 && _lockFees <= 3500, \"!lockFees\");\n require(_stakerFees >= 300 && _stakerFees <= 1500, \"!stakerFees\");\n require(_callerFees >= 10 && _callerFees <= 100, \"!callerFees\");\n require(_platform <= 200, \"!platform\");\n\n lockIncentive = _lockFees;\n stakerIncentive = _stakerFees;\n earmarkIncentive = _callerFees;\n platformFee = _platform;\n\n emit FeesUpdated(_lockFees, _stakerFees, _callerFees, _platform);\n }\n\n /**\n * @notice Set the address of the treasury (i.e. vlCVX)\n */\n function setTreasury(address _treasury) external {\n require(msg.sender==feeManager, \"!auth\");\n treasury = _treasury;\n\n emit TreasuryUpdated(_treasury);\n }\n\n \n /**\n * @dev Set bridge delegate\n * @param _bridgeDelegate The bridge delegate address\n */\n function setBridgeDelegate(address _bridgeDelegate) external {\n require(msg.sender == feeManager, \"!auth\");\n bridgeDelegate = _bridgeDelegate;\n }\n\n function setRewardMultiplier(address rewardContract, uint256 multiplier) external {\n require(msg.sender == feeManager, \"!auth\");\n require(multiplier <= REWARD_MULTIPLIER_DENOMINATOR * 2, \"too high\");\n getRewardMultipliers[rewardContract] = multiplier;\n }\n\n /// END SETTER SECTION ///\n\n\n function poolLength() external view returns (uint256) {\n return poolInfo.length;\n }\n\n /**\n * @notice Called by the PoolManager (i.e. PoolManagerProxy) to add a new pool - creates all the required\n * contracts (DepositToken, RewardPool, Stash) and then adds to the list!\n */\n function addPool(address _lptoken, address _gauge, uint256 _stashVersion) external returns(bool){\n require(msg.sender==poolManager && !isShutdown, \"!add\");\n require(_gauge != address(0) && _lptoken != address(0),\"!param\");\n require(feeTokens[_gauge].distro == address(0), \"!gauge\");\n\n //the next pool's pid\n uint256 pid = poolInfo.length;\n\n //create a tokenized deposit\n address token = ITokenFactory(tokenFactory).CreateDepositToken(_lptoken);\n //create a reward contract for crv rewards\n address newRewardPool = IRewardFactory(rewardFactory).CreateCrvRewards(pid,token,_lptoken);\n //create a stash to handle extra incentives\n address stash = IStashFactory(stashFactory).CreateStash(pid,_gauge,staker,_stashVersion);\n\n //add the new pool\n poolInfo.push(\n PoolInfo({\n lptoken: _lptoken,\n token: token,\n gauge: _gauge,\n crvRewards: newRewardPool,\n stash: stash,\n shutdown: false\n })\n );\n gaugeMap[_gauge] = true;\n //give stashes access to rewardfactory and voteproxy\n // voteproxy so it can grab the incentive tokens off the contract after claiming rewards\n // reward factory so that stashes can make new extra reward contracts if a new incentive is added to the gauge\n if(stash != address(0)){\n poolInfo[pid].stash = stash;\n IStaker(staker).setStashAccess(stash,true);\n IRewardFactory(rewardFactory).setAccess(stash,true);\n }\n\n // Init the pool with the default reward multiplier\n getRewardMultipliers[newRewardPool] = REWARD_MULTIPLIER_DENOMINATOR;\n\n emit PoolAdded(_lptoken, _gauge, token, newRewardPool, stash, pid);\n return true;\n }\n\n /**\n * @notice Shuts down the pool by withdrawing everything from the gauge to here (can later be\n * claimed from depositors by using the withdraw fn) and marking it as shut down\n */\n function shutdownPool(uint256 _pid) external nonReentrant returns(bool){\n require(msg.sender==poolManager, \"!auth\");\n PoolInfo storage pool = poolInfo[_pid];\n\n //withdraw from gauge\n try IStaker(staker).withdrawAll(pool.lptoken,pool.gauge){\n }catch{}\n\n pool.shutdown = true;\n gaugeMap[pool.gauge] = false;\n\n emit PoolShutdown(_pid);\n return true;\n }\n\n /**\n * @notice Shuts down the WHOLE SYSTEM by withdrawing all the LP tokens to here and then allowing\n * for subsequent withdrawal by any depositors.\n */\n function shutdownSystem() external{\n require(msg.sender == owner, \"!auth\");\n isShutdown = true;\n\n for(uint i=0; i < poolInfo.length; i++){\n PoolInfo storage pool = poolInfo[i];\n if (pool.shutdown) continue;\n\n address token = pool.lptoken;\n address gauge = pool.gauge;\n\n //withdraw from gauge\n try IStaker(staker).withdrawAll(token,gauge){\n pool.shutdown = true;\n }catch{}\n }\n }\n\n /**\n * @notice Deposits an \"_amount\" to a given gauge (specified by _pid), mints a `DepositToken`\n * and subsequently stakes that on Convex BaseRewardPool\n */\n function deposit(uint256 _pid, uint256 _amount, bool _stake) public nonReentrant returns(bool){\n require(!isShutdown,\"shutdown\");\n PoolInfo storage pool = poolInfo[_pid];\n require(pool.shutdown == false, \"pool is closed\");\n\n //send to proxy to stake\n address lptoken = pool.lptoken;\n IERC20(lptoken).safeTransferFrom(msg.sender, staker, _amount);\n\n //stake\n address gauge = pool.gauge;\n require(gauge != address(0),\"!gauge setting\");\n IStaker(staker).deposit(lptoken,gauge);\n\n //some gauges claim rewards when depositing, stash them in a seperate contract until next claim\n address stash = pool.stash;\n if(stash != address(0)){\n IStash(stash).stashRewards();\n }\n\n address token = pool.token;\n if(_stake){\n //mint here and send to rewards on user behalf\n ITokenMinter(token).mint(address(this),_amount);\n address rewardContract = pool.crvRewards;\n IERC20(token).safeApprove(rewardContract,0);\n IERC20(token).safeApprove(rewardContract,_amount);\n IRewards(rewardContract).stakeFor(msg.sender,_amount);\n }else{\n //add user balance directly\n ITokenMinter(token).mint(msg.sender,_amount);\n }\n\n \n emit Deposited(msg.sender, _pid, _amount);\n return true;\n }\n\n /**\n * @notice Deposits all a senders balance to a given gauge (specified by _pid), mints a `DepositToken`\n * and subsequently stakes that on Convex BaseRewardPool\n */\n function depositAll(uint256 _pid, bool _stake) external returns(bool){\n address lptoken = poolInfo[_pid].lptoken;\n uint256 balance = IERC20(lptoken).balanceOf(msg.sender);\n deposit(_pid,balance,_stake);\n return true;\n }\n\n /**\n * @notice Withdraws LP tokens from a given PID (& user).\n * 1. Burn the cvxLP balance from \"_from\" (implicit balance check)\n * 2. If pool !shutdown.. withdraw from gauge\n * 3. If stash, stash rewards\n * 4. Transfer out the LP tokens\n */\n function _withdraw(uint256 _pid, uint256 _amount, address _from, address _to) internal nonReentrant {\n PoolInfo storage pool = poolInfo[_pid];\n address lptoken = pool.lptoken;\n address gauge = pool.gauge;\n\n //remove lp balance\n address token = pool.token;\n ITokenMinter(token).burn(_from,_amount);\n\n //pull from gauge if not shutdown\n // if shutdown tokens will be in this contract\n if (!pool.shutdown) {\n IStaker(staker).withdraw(lptoken,gauge, _amount);\n }\n\n //some gauges claim rewards when withdrawing, stash them in a seperate contract until next claim\n //do not call if shutdown since stashes wont have access\n address stash = pool.stash;\n if(stash != address(0) && !isShutdown && !pool.shutdown){\n IStash(stash).stashRewards();\n }\n \n //return lp tokens\n IERC20(lptoken).safeTransfer(_to, _amount);\n\n emit Withdrawn(_to, _pid, _amount);\n }\n\n /**\n * @notice Withdraw a given amount from a pool (must already been unstaked from the Convex Reward Pool -\n * BaseRewardPool uses withdrawAndUnwrap to get around this)\n */\n function withdraw(uint256 _pid, uint256 _amount) public returns(bool){\n _withdraw(_pid,_amount,msg.sender,msg.sender);\n return true;\n }\n\n /**\n * @notice Withdraw all the senders LP tokens from a given gauge\n */\n function withdrawAll(uint256 _pid) public returns(bool){\n address token = poolInfo[_pid].token;\n uint256 userBal = IERC20(token).balanceOf(msg.sender);\n withdraw(_pid, userBal);\n return true;\n }\n\n /**\n * @notice Allows the actual BaseRewardPool to withdraw and send directly to the user\n */\n function withdrawTo(uint256 _pid, uint256 _amount, address _to) external returns(bool){\n address rewardContract = poolInfo[_pid].crvRewards;\n require(msg.sender == rewardContract,\"!auth\");\n\n _withdraw(_pid,_amount,msg.sender,_to);\n return true;\n }\n\n /**\n * @notice set valid vote hash on VoterProxy \n */\n function setVote(bytes32 _hash) external returns(bool){\n require(msg.sender == voteDelegate, \"!auth\");\n \n IStaker(staker).setVote(_hash, false);\n return true;\n }\n\n /**\n * @notice Set delegate on snapshot\n */\n function setDelegate(address _delegateContract, address _delegate, bytes32 _space) external{\n require(msg.sender == voteDelegate, \"!auth\");\n bytes memory data = abi.encodeWithSelector(bytes4(keccak256(\"setDelegate(bytes32,address)\")), _space, _delegate);\n IStaker(staker).execute(_delegateContract,uint256(0),data);\n }\n\n /**\n * @notice Delegate address votes on dao via VoterProxy\n */\n function vote(uint256 _voteId, address _votingAddress, bool _support) external returns(bool){\n require(msg.sender == voteDelegate, \"!auth\");\n require(_votingAddress == voteOwnership || _votingAddress == voteParameter, \"!voteAddr\");\n \n IStaker(staker).vote(_voteId,_votingAddress,_support);\n return true;\n }\n\n /**\n * @notice Delegate address votes on gauge weight via VoterProxy\n */\n function voteGaugeWeight(address[] calldata _gauge, uint256[] calldata _weight ) external returns(bool){\n require(msg.sender == voteDelegate, \"!auth\");\n\n for(uint256 i = 0; i < _gauge.length; i++){\n IStaker(staker).voteGaugeWeight(_gauge[i],_weight[i]);\n }\n return true;\n }\n\n /**\n * @notice Allows a stash to claim secondary rewards from a gauge\n */\n function claimRewards(uint256 _pid, address _gauge) external returns(bool){\n address stash = poolInfo[_pid].stash;\n require(msg.sender == stash,\"!auth\");\n\n IStaker(staker).claimRewards(_gauge);\n return true;\n }\n\n /**\n * @notice Tells the Curve gauge to redirect any accrued rewards to the given stash via the VoterProxy\n */\n function setGaugeRedirect(uint256 _pid) external returns(bool){\n address stash = poolInfo[_pid].stash;\n require(msg.sender == stash,\"!auth\");\n address gauge = poolInfo[_pid].gauge;\n bytes memory data = abi.encodeWithSelector(bytes4(keccak256(\"set_rewards_receiver(address)\")), stash);\n IStaker(staker).execute(gauge,uint256(0),data);\n return true;\n }\n\n /**\n * @notice Basically a hugely pivotal function.\n * Responsible for collecting the crv from gauge, and then redistributing to the correct place.\n * Pays the caller a fee to process this.\n */\n function _earmarkRewards(uint256 _pid) internal {\n PoolInfo storage pool = poolInfo[_pid];\n require(pool.shutdown == false, \"pool is closed\");\n\n address gauge = pool.gauge;\n\n // If there is idle CRV in the Booster we need to transfer it out\n // in order that our accounting doesn't get scewed.\n uint256 crvBBalBefore = IERC20(crv).balanceOf(address(this));\n uint256 crvVBalBefore = IERC20(crv).balanceOf(staker);\n uint256 crvBalBefore = crvBBalBefore.add(crvVBalBefore);\n\n //claim crv\n IStaker(staker).claimCrv(gauge);\n\n //crv balance\n uint256 crvBalAfter = IERC20(crv).balanceOf(address(this));\n uint crvBal = crvBalAfter.sub(crvBalBefore);\n\n if(crvBalBefore > 0 && treasury != address(0)) {\n IERC20(crv).transfer(treasury, crvBalBefore);\n }\n\n //check if there are extra rewards\n address stash = pool.stash;\n if(stash != address(0)){\n //claim extra rewards\n IStash(stash).claimRewards();\n //process extra rewards\n IStash(stash).processStash();\n }\n\n if (crvBal > 0) {\n // LockIncentive = cvxCrv stakers (currently 10%)\n uint256 _lockIncentive = crvBal.mul(lockIncentive).div(FEE_DENOMINATOR);\n // StakerIncentive = cvx stakers (currently 5%)\n uint256 _stakerIncentive = crvBal.mul(stakerIncentive).div(FEE_DENOMINATOR);\n // CallIncentive = caller of this contract (currently 1%)\n uint256 _callIncentive = crvBal.mul(earmarkIncentive).div(FEE_DENOMINATOR);\n \n // Treasury = vlCVX (currently 1%)\n if(treasury != address(0) && treasury != address(this) && platformFee > 0){\n //only subtract after address condition check\n uint256 _platform = crvBal.mul(platformFee).div(FEE_DENOMINATOR);\n crvBal = crvBal.sub(_platform);\n IERC20(crv).safeTransfer(treasury, _platform);\n }\n\n //remove incentives from balance\n crvBal = crvBal.sub(_lockIncentive).sub(_callIncentive).sub(_stakerIncentive);\n\n //send incentives for calling\n IERC20(crv).safeTransfer(msg.sender, _callIncentive); \n\n //send crv to lp provider reward contract\n address rewardContract = pool.crvRewards;\n IERC20(crv).safeTransfer(rewardContract, crvBal);\n IRewards(rewardContract).queueNewRewards(crvBal);\n\n //send lockers' share of crv to reward contract\n IERC20(crv).safeTransfer(lockRewards, _lockIncentive);\n IRewards(lockRewards).queueNewRewards(_lockIncentive);\n\n //send stakers's share of crv to reward contract\n IERC20(crv).safeTransfer(stakerRewards, _stakerIncentive);\n }\n }\n\n /**\n * @notice Basically a hugely pivotal function.\n * Responsible for collecting the crv from gauge, and then redistributing to the correct place.\n * Pays the caller a fee to process this.\n */\n function earmarkRewards(uint256 _pid) external nonReentrant returns(bool){\n require(!isShutdown,\"shutdown\");\n _earmarkRewards(_pid);\n return true;\n }\n\n /**\n * @notice Claim fees from curve distro contract, put in lockers' reward contract.\n * lockFees is the secondary reward contract that uses the virtual balances from cvxCrv\n */\n function earmarkFees(address _feeToken) external nonReentrant returns(bool){\n require(!isShutdown,\"shutdown\");\n FeeDistro memory feeDistro = feeTokens[_feeToken];\n \n require(feeDistro.active, \"Inactive distro\");\n require(!gaugeMap[_feeToken], \"Invalid token\");\n\n //claim fee rewards\n uint256 tokenBalanceVBefore = IERC20(_feeToken).balanceOf(staker);\n uint256 tokenBalanceBBefore = IERC20(_feeToken).balanceOf(address(this));\n uint256 tokenBalanceBefore = tokenBalanceBBefore.add(tokenBalanceVBefore);\n IStaker(staker).claimFees(feeDistro.distro, _feeToken);\n uint256 tokenBalanceAfter = IERC20(_feeToken).balanceOf(address(this));\n uint256 feesClaimed = tokenBalanceAfter.sub(tokenBalanceBefore);\n\n //send fee rewards to reward contract\n IERC20(_feeToken).safeTransfer(feeDistro.rewards, feesClaimed);\n IRewards(feeDistro.rewards).queueNewRewards(feesClaimed);\n\n return true;\n }\n\n /**\n * @notice Callback from reward contract when crv is received.\n * @dev Goes off and mints a relative amount of `CVX` based on the distribution schedule.\n */\n function rewardClaimed(uint256 _pid, address _address, uint256 _amount) external returns(bool){\n address rewardContract = poolInfo[_pid].crvRewards;\n require(msg.sender == rewardContract || msg.sender == lockRewards, \"!auth\");\n\n uint256 mintAmount = _amount.mul(getRewardMultipliers[msg.sender]).div(REWARD_MULTIPLIER_DENOMINATOR);\n\n if(mintAmount > 0) {\n //mint reward tokens\n ITokenMinter(minter).mint(_address, mintAmount);\n }\n \n return true;\n }\n \n\n /**\n * @dev Distribute fees from L2 to L1 reward contracts\n * @param _amount Amount of fees to distribute\n */\n function distributeL2Fees(uint256 _amount) external nonReentrant {\n require(msg.sender == bridgeDelegate, \"!auth\");\n\n // calculate the rewards that were paid based on the incentives that\n // are being distributed\n uint256 totalIncentives = lockIncentive.add(stakerIncentive);\n uint256 totalFarmed = _amount.mul(FEE_DENOMINATOR).div(totalIncentives);\n uint256 eligibleForMint = totalFarmed.sub(_amount);\n\n // Ensure that the total amount of rewards claimed per epoch is less than 70k\n uint256 epoch = block.timestamp.div(epochLength);\n l2FeesHistory[epoch] = l2FeesHistory[epoch].add(totalFarmed);\n require(l2FeesHistory[epoch] <= 70000e18, \"Too many L2 Fees\");\n\n // Calculate fees for individual reward contracts\n uint256 _lockIncentive = _amount.mul(lockIncentive).div(totalIncentives);\n uint256 _stakerIncentive = _amount.sub(_lockIncentive);\n\n //send lockers' share of crv to reward contract\n IERC20(crv).safeTransferFrom(bridgeDelegate, lockRewards, _lockIncentive);\n IRewards(lockRewards).queueNewRewards(_lockIncentive);\n\n //send stakers's share of crv to reward contract\n IERC20(crv).safeTransferFrom(bridgeDelegate, stakerRewards, _stakerIncentive);\n\n // Mint CVX to bridge delegate\n ITokenMinter(minter).mint(bridgeDelegate, eligibleForMint);\n }\n}\n"
},
"convex-platform/contracts/contracts/cCrv.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/ERC20.sol\";\n\n\n/**\n * @title cvxCrvToken\n * @author ConvexFinance\n * @notice Dumb ERC20 token that allows the operator (crvDepositor) to mint and burn tokens\n */\ncontract cvxCrvToken is ERC20 {\n using SafeERC20 for IERC20;\n using Address for address;\n using SafeMath for uint256;\n\n address public operator;\n\n constructor(string memory _nameArg, string memory _symbolArg)\n public\n ERC20(\n _nameArg,\n _symbolArg\n )\n {\n operator = msg.sender;\n }\n\n /**\n * @notice Allows the initial operator (deployer) to set the operator.\n * Note - crvDepositor has no way to change this back, so it's effectively immutable\n */\n function setOperator(address _operator) external {\n require(msg.sender == operator, \"!auth\");\n operator = _operator;\n }\n\n /**\n * @notice Allows the crvDepositor to mint\n */\n function mint(address _to, uint256 _amount) external {\n require(msg.sender == operator, \"!authorized\");\n \n _mint(_to, _amount);\n }\n\n /**\n * @notice Allows the crvDepositor to burn\n */\n function burn(address _from, uint256 _amount) external {\n require(msg.sender == operator, \"!authorized\");\n \n _burn(_from, _amount);\n }\n\n}\n"
},
"convex-platform/contracts/contracts/CrvDepositor.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity 0.6.12;\n\nimport \"./Interfaces.sol\";\nimport \"@openzeppelin/contracts-0.6/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts-0.6/utils/Address.sol\";\nimport \"@openzeppelin/contracts-0.6/token/ERC20/SafeERC20.sol\";\n\n\n/**\n * @title CrvDepositor\n * @author ConvexFinance\n * @notice This is the entry point for CRV > cvxCRV wrapping. It accepts CRV, sends to 'staker'\n * for depositing into Curves VotingEscrow, and then mints cvxCRV at 1:1 via the 'minter' (cCrv) minus\n * the lockIncentive (initially 1%) which is used to basically compensate users who call the `lock` function on Curves\n * system (larger depositors would likely want to lock).\n */\ncontract CrvDepositor{\n using SafeERC20 for IERC20;\n using Address for address;\n using SafeMath for uint256;\n\n address public immutable crvBpt;\n address public immutable escrow;\n uint256 private constant MAXTIME = 1 * 364 * 86400;\n uint256 private constant WEEK = 7 * 86400;\n\n uint256 public lockIncentive = 10; //incentive to users who spend gas to lock crvBpt\n uint256 public constant FEE_DENOMINATOR = 10000;\n\n address public feeManager;\n address public daoOperator;\n address public immutable staker;\n address public immutable minter;\n uint256 public incentiveCrv = 0;\n uint256 public unlockTime;\n\n bool public cooldown;\n\n /**\n * @param _staker CVX VoterProxy (0x989AEb4d175e16225E39E87d0D97A3360524AD80)\n * @param _minter cvxCRV token (0x62B9c7356A2Dc64a1969e19C23e4f579F9810Aa7)\n * @param _crvBpt crvBPT for veCRV deposits\n * @param _escrow CRV VotingEscrow (0x5f3b5DfEb7B28CDbD7FAba78963EE202a494e2A2)\n */\n constructor(\n address _staker,\n address _minter,\n address _crvBpt,\n address _escrow,\n address _daoOperator\n ) public {\n staker = _staker;\n minter = _minter;\n crvBpt = _crvBpt;\n escrow = _escrow;\n feeManager = msg.sender;\n daoOperator = _daoOperator;\n }\n\n function setFeeManager(address _feeManager) external {\n require(msg.sender == feeManager, \"!auth\");\n feeManager = _feeManager;\n }\n\n function setDaoOperator(address _daoOperator) external {\n require(msg.sender == daoOperator, \"!auth\");\n daoOperator = _daoOperator;\n }\n\n function setFees(uint256 _lockIncentive) external{\n require(msg.sender==feeManager, \"!auth\");\n\n if(_lockIncentive >= 0 && _lockIncentive <= 30){\n lockIncentive = _lockIncentive;\n }\n }\n\n function setCooldown(bool _cooldown) external {\n require(msg.sender == daoOperator, \"!auth\");\n cooldown = _cooldown;\n }\n\n /**\n * @notice Called once to deposit the balance of CRV in this contract to the VotingEscrow\n */\n function initialLock() external{\n require(!cooldown, \"cooldown\");\n require(msg.sender==feeManager, \"!auth\");\n\n uint256 vecrv = IERC20(escrow).balanceOf(staker);\n if(vecrv == 0){\n uint256 unlockAt = block.timestamp + MAXTIME;\n uint256 unlockInWeeks = (unlockAt/WEEK)*WEEK;\n\n //release old lock if exists\n IStaker(staker).release();\n //create new lock\n uint256 crvBalanceStaker = IERC20(crvBpt).balanceOf(staker);\n IStaker(staker).createLock(crvBalanceStaker, unlockAt);\n unlockTime = unlockInWeeks;\n }\n }\n\n //lock curve\n function _lockCurve() internal {\n if(cooldown) {\n return;\n }\n\n uint256 crvBalance = IERC20(crvBpt).balanceOf(address(this));\n if(crvBalance > 0){\n IERC20(crvBpt).safeTransfer(staker, crvBalance);\n }\n \n //increase ammount\n uint256 crvBalanceStaker = IERC20(crvBpt).balanceOf(staker);\n if(crvBalanceStaker == 0){\n return;\n }\n \n //increase amount\n IStaker(staker).increaseAmount(crvBalanceStaker);\n \n\n uint256 unlockAt = block.timestamp + MAXTIME;\n uint256 unlockInWeeks = (unlockAt/WEEK)*WEEK;\n\n //increase time too if over 1 week buffer\n if(unlockInWeeks.sub(unlockTime) >= WEEK){\n IStaker(staker).increaseTime(unlockAt);\n unlockTime = unlockInWeeks;\n }\n }\n\n /**\n * @notice Locks the balance of CRV, and gives out an incentive to the caller\n */\n function lockCurve() external {\n require(!cooldown, \"cooldown\");\n _lockCurve();\n\n //mint incentives\n if(incentiveCrv > 0){\n ITokenMinter(minter).mint(msg.sender,incentiveCrv);\n incentiveCrv = 0;\n }\n }\n\n /**\n * @notice Deposit crvBpt for cvxCrv on behalf of another user\n * @dev See depositFor(address, uint256, bool, address) \n */\n function deposit(uint256 _amount, bool _lock, address _stakeAddress) public {\n depositFor(msg.sender, _amount, _lock, _stakeAddress);\n }\n\n /**\n * @notice Deposit crvBpt for cvxCrv\n * @dev Can lock immediately or defer locking to someone else by paying a fee.\n * while users can choose to lock or defer, this is mostly in place so that\n * the cvx reward contract isnt costly to claim rewards.\n * @param _amount Units of CRV to deposit\n * @param _lock Lock now? or pay ~1% to the locker\n * @param _stakeAddress Stake in cvxCrv staking?\n */\n function depositFor(address to, uint256 _amount, bool _lock, address _stakeAddress) public {\n require(_amount > 0,\"!>0\");\n require(!cooldown, \"cooldown\");\n\n if(_lock){\n //lock immediately, transfer directly to staker to skip an erc20 transfer\n IERC20(crvBpt).safeTransferFrom(msg.sender, staker, _amount);\n _lockCurve();\n if(incentiveCrv > 0){\n //add the incentive tokens here so they can be staked together\n _amount = _amount.add(incentiveCrv);\n incentiveCrv = 0;\n }\n }else{\n //move tokens here\n IERC20(crvBpt).safeTransferFrom(msg.sender, address(this), _amount);\n //defer lock cost to another user\n uint256 callIncentive = _amount.mul(lockIncentive).div(FEE_DENOMINATOR);\n _amount = _amount.sub(callIncentive);\n\n //add to a pool for lock caller\n incentiveCrv = incentiveCrv.add(callIncentive);\n }\n\n bool depositOnly = _stakeAddress == address(0);\n if(depositOnly){\n //mint for to\n ITokenMinter(minter).mint(to,_amount);\n }else{\n //mint here \n ITokenMinter(minter).mint(address(this),_amount);\n //stake for to\n IERC20(minter).safeApprove(_stakeAddress,0);\n IERC20(minter).safeApprove(_stakeAddress,_amount);\n IRewards(_stakeAddress).stakeFor(to,_amount);\n }\n }\n\n function deposit(uint256 _amount, bool _lock) external {\n deposit(_amount,_lock,address(0));\n }\n\n function depositAll(bool _lock, address _stakeAddress) external{\n uint256 crvBal = IERC20(crvBpt).balanceOf(msg.sender);\n deposit(crvBal,_lock,_stakeAddress);\n }\n}\n"
}
},
"settings": {
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}
}