@venusprotocol/governance-contracts/artifacts/build-info/bb792d434e41d4003eeb48354b3a6c5c.json

### Prerequisites

{"id":"bb792d434e41d4003eeb48354b3a6c5c","_format":"hh-sol-build-info-1","solcVersion":"0.5.16","solcLongVersion":"0.5.16+commit.9c3226ce","input":{"language":"Solidity","sources":{"contracts/Governance/Timelock.sol":{"content":"pragma solidity ^0.5.16;\n\nimport \"../Utils/SafeMath.sol\";\n\n/**\n * @title Timelock\n * @author Venus\n * @notice The Timelock contract.\n */\ncontract Timelock {\n    using SafeMath for uint;\n    /// @notice Event emitted when a new admin is accepted\n    event NewAdmin(address indexed newAdmin);\n\n    /// @notice Event emitted when a new admin is proposed\n    event NewPendingAdmin(address indexed newPendingAdmin);\n\n    /// @notice Event emitted when a new admin is proposed\n    event NewDelay(uint indexed newDelay);\n\n    /// @notice Event emitted when a proposal transaction has been cancelled\n    event CancelTransaction(\n        bytes32 indexed txHash,\n        address indexed target,\n        uint value,\n        string signature,\n        bytes data,\n        uint eta\n    );\n\n    /// @notice Event emitted when a proposal transaction has been executed\n    event ExecuteTransaction(\n        bytes32 indexed txHash,\n        address indexed target,\n        uint value,\n        string signature,\n        bytes data,\n        uint eta\n    );\n\n    /// @notice Event emitted when a proposal transaction has been queued\n    event QueueTransaction(\n        bytes32 indexed txHash,\n        address indexed target,\n        uint value,\n        string signature,\n        bytes data,\n        uint eta\n    );\n\n    /// @notice Required period to execute a proposal transaction\n    uint public constant GRACE_PERIOD = 14 days;\n\n    /// @notice Minimum amount of time a proposal transaction must be queued\n    uint public constant MINIMUM_DELAY = 1 hours;\n\n    /// @notice Maximum amount of time a proposal transaction must be queued\n    uint public constant MAXIMUM_DELAY = 30 days;\n\n    /// @notice Timelock admin authorized to queue and execute transactions\n    address public admin;\n\n    /// @notice Account proposed as the next admin\n    address public pendingAdmin;\n\n    /// @notice Period for a proposal transaction to be queued\n    uint public delay;\n\n    /// @notice Mapping of queued transactions\n    mapping(bytes32 => bool) public queuedTransactions;\n\n    constructor(address admin_, uint delay_) public {\n        require(delay_ >= MINIMUM_DELAY, \"Timelock::constructor: Delay must exceed minimum delay.\");\n        require(delay_ <= MAXIMUM_DELAY, \"Timelock::setDelay: Delay must not exceed maximum delay.\");\n\n        admin = admin_;\n        delay = delay_;\n    }\n\n    function() external payable {}\n\n    /**\n     * @notice Setter for the transaction queue delay\n     * @param delay_ The new delay period for the transaction queue\n     */\n    function setDelay(uint delay_) public {\n        require(msg.sender == address(this), \"Timelock::setDelay: Call must come from Timelock.\");\n        require(delay_ >= MINIMUM_DELAY, \"Timelock::setDelay: Delay must exceed minimum delay.\");\n        require(delay_ <= MAXIMUM_DELAY, \"Timelock::setDelay: Delay must not exceed maximum delay.\");\n        delay = delay_;\n\n        emit NewDelay(delay);\n    }\n\n    /**\n     * @notice Method for accepting a proposed admin\n     */\n    function acceptAdmin() public {\n        require(msg.sender == pendingAdmin, \"Timelock::acceptAdmin: Call must come from pendingAdmin.\");\n        admin = msg.sender;\n        pendingAdmin = address(0);\n\n        emit NewAdmin(admin);\n    }\n\n    /**\n     * @notice Method to propose a new admin authorized to call timelock functions. This should be the Governor Contract\n     * @param pendingAdmin_ Address of the proposed admin\n     */\n    function setPendingAdmin(address pendingAdmin_) public {\n        require(msg.sender == address(this), \"Timelock::setPendingAdmin: Call must come from Timelock.\");\n        pendingAdmin = pendingAdmin_;\n\n        emit NewPendingAdmin(pendingAdmin);\n    }\n\n    /**\n     * @notice Called for each action when queuing a proposal\n     * @param target Address of the contract with the method to be called\n     * @param value Native token amount sent with the transaction\n     * @param signature Ssignature of the function to be called\n     * @param data Arguments to be passed to the function when called\n     * @param eta Timestamp after which the transaction can be executed\n     * @return Hash of the queued transaction\n     */\n    function queueTransaction(\n        address target,\n        uint value,\n        string memory signature,\n        bytes memory data,\n        uint eta\n    ) public returns (bytes32) {\n        require(msg.sender == admin, \"Timelock::queueTransaction: Call must come from admin.\");\n        require(\n            eta >= getBlockTimestamp().add(delay),\n            \"Timelock::queueTransaction: Estimated execution block must satisfy delay.\"\n        );\n\n        bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta));\n        queuedTransactions[txHash] = true;\n\n        emit QueueTransaction(txHash, target, value, signature, data, eta);\n        return txHash;\n    }\n\n    /**\n     * @notice Called to cancel a queued transaction\n     * @param target Address of the contract with the method to be called\n     * @param value Native token amount sent with the transaction\n     * @param signature Ssignature of the function to be called\n     * @param data Arguments to be passed to the function when called\n     * @param eta Timestamp after which the transaction can be executed\n     */\n    function cancelTransaction(\n        address target,\n        uint value,\n        string memory signature,\n        bytes memory data,\n        uint eta\n    ) public {\n        require(msg.sender == admin, \"Timelock::cancelTransaction: Call must come from admin.\");\n\n        bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta));\n        queuedTransactions[txHash] = false;\n\n        emit CancelTransaction(txHash, target, value, signature, data, eta);\n    }\n\n    /**\n     * @notice Called to execute a queued transaction\n     * @param target Address of the contract with the method to be called\n     * @param value Native token amount sent with the transaction\n     * @param signature Ssignature of the function to be called\n     * @param data Arguments to be passed to the function when called\n     * @param eta Timestamp after which the transaction can be executed\n     */\n    function executeTransaction(\n        address target,\n        uint value,\n        string memory signature,\n        bytes memory data,\n        uint eta\n    ) public payable returns (bytes memory) {\n        require(msg.sender == admin, \"Timelock::executeTransaction: Call must come from admin.\");\n\n        bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta));\n        require(queuedTransactions[txHash], \"Timelock::executeTransaction: Transaction hasn't been queued.\");\n        require(getBlockTimestamp() >= eta, \"Timelock::executeTransaction: Transaction hasn't surpassed time lock.\");\n        require(getBlockTimestamp() <= eta.add(GRACE_PERIOD), \"Timelock::executeTransaction: Transaction is stale.\");\n\n        queuedTransactions[txHash] = false;\n\n        bytes memory callData;\n\n        if (bytes(signature).length == 0) {\n            callData = data;\n        } else {\n            callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data);\n        }\n\n        // solium-disable-next-line security/no-call-value\n        (bool success, bytes memory returnData) = target.call.value(value)(callData);\n        require(success, \"Timelock::executeTransaction: Transaction execution reverted.\");\n\n        emit ExecuteTransaction(txHash, target, value, signature, data, eta);\n\n        return returnData;\n    }\n\n    function getBlockTimestamp() internal view returns (uint) {\n        // solium-disable-next-line security/no-block-members\n        return block.timestamp;\n    }\n}\n"},"contracts/Utils/SafeMath.sol":{"content":"pragma solidity ^0.5.16;\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, reverting on\n     * overflow.\n     *\n     * Counterpart to Solidity's `+` operator.\n     *\n     * Requirements:\n     * - Addition cannot overflow.\n     */\n    function add(uint256 a, uint256 b) internal pure returns (uint256) {\n        return add(a, b, \"SafeMath: addition overflow\");\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     * Counterpart to Solidity's `-` operator.\n     *\n     * Requirements:\n     * - Subtraction cannot overflow.\n     */\n    function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        uint256 c = a + b;\n        require(c >= a, errorMessage);\n\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     * - Subtraction cannot overflow.\n     */\n    function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n        return sub(a, b, \"SafeMath: subtraction overflow\");\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     * Counterpart to Solidity's `-` operator.\n     *\n     * Requirements:\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        uint256 c = a - b;\n\n        return c;\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     * - Multiplication cannot overflow.\n     */\n    function mul(uint256 a, uint256 b) internal pure returns (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) {\n            return 0;\n        }\n\n        uint256 c = a * b;\n        require(c / a == b, \"SafeMath: multiplication overflow\");\n\n        return c;\n    }\n\n    /**\n     * @dev Returns the integer division of two unsigned integers. Reverts 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     * - The divisor cannot be zero.\n     */\n    function div(uint256 a, uint256 b) internal pure returns (uint256) {\n        return div(a, b, \"SafeMath: division by zero\");\n    }\n\n    /**\n     * @dev Returns the integer division of two unsigned integers. Reverts with custom message 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     * - The divisor cannot be zero.\n     */\n    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {\n        // Solidity only automatically asserts when dividing by 0\n        require(b > 0, errorMessage);\n        uint256 c = a / b;\n        // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n\n        return c;\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * Reverts 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     * - The divisor cannot be zero.\n     */\n    function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n        return mod(a, b, \"SafeMath: modulo by zero\");\n    }\n\n    /**\n     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n     * Reverts with custom message 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     * - 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    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