{"compiler":{"version":"0.8.3+commit.8d00100c"},"language":"Solidity","output":{"abi":[{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_rewardsDistribution","type":"address"},{"internalType":"address","name":"_rewardsToken","type":"address"},{"internalType":"address","name":"_stakingToken","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldOwner","type":"address"},{"indexed":false,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnerChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnerNominated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Recovered","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newDuration","type":"uint256"}],"name":"RewardsDurationUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Staked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdrawn","type":"event"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"earned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"exit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getRewardForDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastTimeRewardApplicable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastUpdateTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"nominateNewOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"nominatedOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"reward","type":"uint256"}],"name":"notifyRewardAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"periodFinish","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"tokenAmount","type":"uint256"}],"name":"recoverERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rewardPerToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardPerTokenStored","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"rewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsDistribution","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_rewardsDistribution","type":"address"}],"name":"setRewardsDistribution","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rewardsDuration","type":"uint256"}],"name":"setRewardsDuration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stakingToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"}],"name":"updatePeriodFinish","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}],"devdoc":{"kind":"dev","methods":{},"version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"contracts/synthetix/contracts/StakingRewards.sol":"StakingRewards"},"evmVersion":"istanbul","libraries":{},"metadata":{"bytecodeHash":"ipfs","useLiteralContent":true},"optimizer":{"enabled":true,"runs":999999},"remappings":[]},"sources":{"contracts/openzeppelin-solidity/contracts/Address.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^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 {\n            size := extcodesize(account)\n        }\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(\n            address(this).balance >= amount,\n            \"Address: insufficient balance\"\n        );\n\n        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(\n            success,\n            \"Address: unable to send value, recipient may have reverted\"\n        );\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)\n        internal\n        returns (bytes memory)\n    {\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(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) 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(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return\n            functionCallWithValue(\n                target,\n                data,\n                value,\n                \"Address: low-level call with value failed\"\n            );\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(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(\n            address(this).balance >= value,\n            \"Address: insufficient balance for call\"\n        );\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) =\n            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)\n        internal\n        view\n        returns (bytes memory)\n    {\n        return\n            functionStaticCall(\n                target,\n                data,\n                \"Address: low-level static call failed\"\n            );\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(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) 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)\n        internal\n        returns (bytes memory)\n    {\n        return\n            functionDelegateCall(\n                target,\n                data,\n                \"Address: low-level delegate call failed\"\n            );\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(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) 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(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) 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","keccak256":"0xe2c9a94ae491a234d92a1beac78ecce500eaf4e5ab285c87ec74ac073c128935","license":"MIT"},"contracts/openzeppelin-solidity/contracts/IERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^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)\n        external\n        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)\n        external\n        view\n        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(\n        address sender,\n        address recipient,\n        uint256 amount\n    ) 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(\n        address indexed owner,\n        address indexed spender,\n        uint256 value\n    );\n}\n","keccak256":"0x1a3fe05486ba5f5dbaa5fd9b8bdef2231a8675fb1fee2da87b01ac753837271f","license":"MIT"},"contracts/openzeppelin-solidity/contracts/Math.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary Math {\n    /**\n     * @dev Returns the largest of two numbers.\n     */\n    function max(uint256 a, uint256 b) internal pure returns (uint256) {\n        return a >= b ? a : b;\n    }\n\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\n    /**\n     * @dev Returns the average of two numbers. The result is rounded towards\n     * zero.\n     */\n    function average(uint256 a, uint256 b) internal pure returns (uint256) {\n        // (a + b) / 2 can overflow, so we distribute\n        return (a / 2) + (b / 2) + (((a % 2) + (b % 2)) / 2);\n    }\n}\n","keccak256":"0x4b6df8c606deac20cbad65d8e59ff1dd0e6b8858f834c4e7547e9e119a8931d0","license":"MIT"},"contracts/openzeppelin-solidity/contracts/ReentrancyGuard.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^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() {\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","keccak256":"0x842ccf9a6cd33e17b7acef8372ca42090755217b358fe0c44c98e951ea549d3a","license":"MIT"},"contracts/openzeppelin-solidity/contracts/SafeERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"./IERC20.sol\";\nimport \"./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 Address for address;\n\n    function safeTransfer(\n        IERC20 token,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(\n            token,\n            abi.encodeWithSelector(token.transfer.selector, to, value)\n        );\n    }\n\n    function safeTransferFrom(\n        IERC20 token,\n        address from,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(\n            token,\n            abi.encodeWithSelector(token.transferFrom.selector, from, to, value)\n        );\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(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) 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(\n            (value == 0) || (token.allowance(address(this), spender) == 0),\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\n        );\n        _callOptionalReturn(\n            token,\n            abi.encodeWithSelector(token.approve.selector, spender, value)\n        );\n    }\n\n    function safeIncreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        uint256 newAllowance = token.allowance(address(this), spender) + value;\n        _callOptionalReturn(\n            token,\n            abi.encodeWithSelector(\n                token.approve.selector,\n                spender,\n                newAllowance\n            )\n        );\n    }\n\n    function safeDecreaseAllowance(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        unchecked {\n            uint256 oldAllowance = token.allowance(address(this), spender);\n            require(\n                oldAllowance >= value,\n                \"SafeERC20: decreased allowance below zero\"\n            );\n            uint256 newAllowance = oldAllowance - value;\n            _callOptionalReturn(\n                token,\n                abi.encodeWithSelector(\n                    token.approve.selector,\n                    spender,\n                    newAllowance\n                )\n            );\n        }\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 =\n            address(token).functionCall(\n                data,\n                \"SafeERC20: low-level call failed\"\n            );\n        if (returndata.length > 0) {\n            // Return data is optional\n            // solhint-disable-next-line max-line-length\n            require(\n                abi.decode(returndata, (bool)),\n                \"SafeERC20: ERC20 operation did not succeed\"\n            );\n        }\n    }\n}\n","keccak256":"0x2958b21bad48ed44a0454b59952260315951a8ff51bb985b76e54642ca38b058","license":"MIT"},"contracts/openzeppelin-solidity/contracts/SafeMath.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n// CAUTION\n// This version of SafeMath should only be used with Solidity 0.8 or later,\n// because it relies on the compiler's built in overflow checks.\n\n/**\n * @dev Wrappers over Solidity's arithmetic operations.\n *\n * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler\n * now has built in overflow checking.\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)\n        internal\n        pure\n        returns (bool, uint256)\n    {\n        unchecked {\n            uint256 c = a + b;\n            if (c < a) return (false, 0);\n            return (true, c);\n        }\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)\n        internal\n        pure\n        returns (bool, uint256)\n    {\n        unchecked {\n            if (b > a) return (false, 0);\n            return (true, a - b);\n        }\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)\n        internal\n        pure\n        returns (bool, uint256)\n    {\n        unchecked {\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    /**\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)\n        internal\n        pure\n        returns (bool, uint256)\n    {\n        unchecked {\n            if (b == 0) return (false, 0);\n            return (true, a / b);\n        }\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)\n        internal\n        pure\n        returns (bool, uint256)\n    {\n        unchecked {\n            if (b == 0) return (false, 0);\n            return (true, a % b);\n        }\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        return a + b;\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        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        return a * b;\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.\n     *\n     * Requirements:\n     *\n     * - The divisor cannot be zero.\n     */\n    function div(uint256 a, uint256 b) internal pure returns (uint256) {\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        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(\n        uint256 a,\n        uint256 b,\n        string memory errorMessage\n    ) internal pure returns (uint256) {\n        unchecked {\n            require(b <= a, errorMessage);\n            return a - b;\n        }\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     * 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     * 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(\n        uint256 a,\n        uint256 b,\n        string memory errorMessage\n    ) internal pure returns (uint256) {\n        unchecked {\n            require(b > 0, errorMessage);\n            return a / b;\n        }\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(\n        uint256 a,\n        uint256 b,\n        string memory errorMessage\n    ) internal pure returns (uint256) {\n        unchecked {\n            require(b > 0, errorMessage);\n            return a % b;\n        }\n    }\n}\n","keccak256":"0xb22899f9a19266dbaaa5c39cd0a3bfc5dceba13be5d4d11e2f8908d8b5990198","license":"MIT"},"contracts/synthetix/contracts/Owned.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.3;\n\n\n// https://docs.synthetix.io/contracts/source/contracts/owned\ncontract Owned {\n    address public owner;\n    address public nominatedOwner;\n\n    constructor(address _owner) {\n        require(_owner != address(0), \"Owner address cannot be 0\");\n        owner = _owner;\n        emit OwnerChanged(address(0), _owner);\n    }\n\n    function nominateNewOwner(address _owner) external onlyOwner {\n        nominatedOwner = _owner;\n        emit OwnerNominated(_owner);\n    }\n\n    function acceptOwnership() external {\n        require(msg.sender == nominatedOwner, \"You must be nominated before you can accept ownership\");\n        emit OwnerChanged(owner, nominatedOwner);\n        owner = nominatedOwner;\n        nominatedOwner = address(0);\n    }\n\n    modifier onlyOwner {\n        _onlyOwner();\n        _;\n    }\n\n    function _onlyOwner() private view {\n        require(msg.sender == owner, \"Only the contract owner may perform this action\");\n    }\n\n    event OwnerNominated(address newOwner);\n    event OwnerChanged(address oldOwner, address newOwner);\n}\n","keccak256":"0x42f77b210c9f4d9d45c43633832837ca38e4adf6d16f32946c678be24d4e5e55","license":"MIT"},"contracts/synthetix/contracts/RewardsDistributionRecipient.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.3;\n\n// Inheritance\nimport \"./Owned.sol\";\n\n\n// https://docs.synthetix.io/contracts/source/contracts/rewardsdistributionrecipient\nabstract contract RewardsDistributionRecipient is Owned {\n    address public rewardsDistribution;\n\n    function notifyRewardAmount(uint256 reward) external virtual;\n\n    modifier onlyRewardsDistribution() {\n        require(msg.sender == rewardsDistribution, \"Caller is not RewardsDistribution contract\");\n        _;\n    }\n\n    function setRewardsDistribution(address _rewardsDistribution) external onlyOwner {\n        rewardsDistribution = _rewardsDistribution;\n    }\n}\n","keccak256":"0x632e1b50abec5758ce58d3f10d062bfe1758ee5536d24f84ceb0d34418c1e518","license":"MIT"},"contracts/synthetix/contracts/StakingRewards.sol":{"content":"// SPDX-License-Identifier: MIT\n// solhint-disable not-rely-on-time\n\npragma solidity ^0.8.3;\n\nimport \"../../openzeppelin-solidity/contracts/Math.sol\";\nimport \"../../openzeppelin-solidity/contracts/SafeMath.sol\";\nimport \"../../openzeppelin-solidity/contracts/SafeERC20.sol\";\nimport \"../../openzeppelin-solidity/contracts/ReentrancyGuard.sol\";\n\n// Inheritance\nimport \"./interfaces/IStakingRewards.sol\";\nimport \"./RewardsDistributionRecipient.sol\";\n\n\n// https://docs.synthetix.io/contracts/source/contracts/stakingrewards\n// XXX: removed Pausable\ncontract StakingRewards is IStakingRewards, RewardsDistributionRecipient, ReentrancyGuard {\n    using SafeMath for uint256;\n    using SafeERC20 for IERC20;\n\n    /* ========== STATE VARIABLES ========== */\n\n    IERC20 public rewardsToken;\n    IERC20 public stakingToken;\n    uint256 public periodFinish = 0;\n    uint256 public rewardRate = 0;\n    uint256 public rewardsDuration = 7 days;\n    uint256 public lastUpdateTime;\n    uint256 public rewardPerTokenStored;\n\n    mapping(address => uint256) public userRewardPerTokenPaid;\n    mapping(address => uint256) public rewards;\n\n    uint256 private _totalSupply;\n    mapping(address => uint256) private _balances;\n\n    /* ========== CONSTRUCTOR ========== */\n\n    constructor(\n        address _owner,\n        address _rewardsDistribution,\n        address _rewardsToken,\n        address _stakingToken\n    ) Owned(_owner) {\n        rewardsToken = IERC20(_rewardsToken);\n        stakingToken = IERC20(_stakingToken);\n        rewardsDistribution = _rewardsDistribution;\n    }\n\n    /* ========== VIEWS ========== */\n\n    function totalSupply() external view override returns (uint256) {\n        return _totalSupply;\n    }\n\n    function balanceOf(address account) external view override returns (uint256) {\n        return _balances[account];\n    }\n\n    function lastTimeRewardApplicable() public view override returns (uint256) {\n        return Math.min(block.timestamp, periodFinish);\n    }\n\n    function rewardPerToken() public view override returns (uint256) {\n        if (_totalSupply == 0) {\n            return rewardPerTokenStored;\n        }\n        return\n            rewardPerTokenStored.add(\n                lastTimeRewardApplicable().sub(lastUpdateTime).mul(rewardRate).mul(1e18).div(_totalSupply)\n            );\n    }\n\n    function earned(address account) public view override returns (uint256) {\n        return _balances[account].mul(rewardPerToken().sub(userRewardPerTokenPaid[account])).div(1e18).add(rewards[account]);\n    }\n\n    function getRewardForDuration() external view override returns (uint256) {\n        return rewardRate.mul(rewardsDuration);\n    }\n\n    /* ========== MUTATIVE FUNCTIONS ========== */\n\n    // XXX: removed notPaused\n    function stake(uint256 amount) external override nonReentrant updateReward(msg.sender) {\n        require(amount > 0, \"Cannot stake 0\");\n        _totalSupply = _totalSupply.add(amount);\n        _balances[msg.sender] = _balances[msg.sender].add(amount);\n        stakingToken.safeTransferFrom(msg.sender, address(this), amount);\n        emit Staked(msg.sender, amount);\n    }\n\n    function withdraw(uint256 amount) public override nonReentrant updateReward(msg.sender) {\n        require(amount > 0, \"Cannot withdraw 0\");\n        _totalSupply = _totalSupply.sub(amount);\n        _balances[msg.sender] = _balances[msg.sender].sub(amount);\n        stakingToken.safeTransfer(msg.sender, amount);\n        emit Withdrawn(msg.sender, amount);\n    }\n\n    function getReward() public override nonReentrant updateReward(msg.sender) {\n        uint256 reward = rewards[msg.sender];\n        if (reward > 0) {\n            rewards[msg.sender] = 0;\n            rewardsToken.safeTransfer(msg.sender, reward);\n            emit RewardPaid(msg.sender, reward);\n        }\n    }\n\n    function exit() external override {\n        withdraw(_balances[msg.sender]);\n        getReward();\n    }\n\n    /* ========== RESTRICTED FUNCTIONS ========== */\n\n    function notifyRewardAmount(uint256 reward) external override onlyRewardsDistribution updateReward(address(0)) {\n        if (block.timestamp >= periodFinish) {\n            rewardRate = reward.div(rewardsDuration);\n        } else {\n            uint256 remaining = periodFinish.sub(block.timestamp);\n            uint256 leftover = remaining.mul(rewardRate);\n            rewardRate = reward.add(leftover).div(rewardsDuration);\n        }\n\n        // Ensure the provided reward amount is not more than the balance in the contract.\n        // This keeps the reward rate in the right range, preventing overflows due to\n        // very high values of rewardRate in the earned and rewardsPerToken functions;\n        // Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.\n        uint balance = rewardsToken.balanceOf(address(this));\n        require(rewardRate <= balance.div(rewardsDuration), \"Provided reward too high\");\n\n        lastUpdateTime = block.timestamp;\n        periodFinish = block.timestamp.add(rewardsDuration);\n        emit RewardAdded(reward);\n    }\n\n    // End rewards emission earlier\n    function updatePeriodFinish(uint timestamp) external onlyOwner updateReward(address(0)) {\n        periodFinish = timestamp;\n    }\n\n    // Added to support recovering LP Rewards from other systems such as BAL to be distributed to holders\n    function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyOwner {\n        require(tokenAddress != address(stakingToken), \"Cannot withdraw the staking token\");\n        IERC20(tokenAddress).safeTransfer(owner, tokenAmount);\n        emit Recovered(tokenAddress, tokenAmount);\n    }\n\n    function setRewardsDuration(uint256 _rewardsDuration) external onlyOwner {\n        require(\n            block.timestamp > periodFinish,\n            \"Previous rewards period must be complete before changing the duration for the new period\"\n        );\n        rewardsDuration = _rewardsDuration;\n        emit RewardsDurationUpdated(rewardsDuration);\n    }\n\n    /* ========== MODIFIERS ========== */\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    /* ========== EVENTS ========== */\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 RewardsDurationUpdated(uint256 newDuration);\n    event Recovered(address token, uint256 amount);\n}\n","keccak256":"0x73f3c6a13cec9589d2dfb32b6e4f6dee2af4c64f0a9761913ce152bf799bd0f4","license":"MIT"},"contracts/synthetix/contracts/interfaces/IStakingRewards.sol":{"content":"// SPDX-License-Identifier: MIT\n\npragma solidity >=0.4.24;\n\n\n// https://docs.synthetix.io/contracts/source/interfaces/istakingrewards\ninterface IStakingRewards {\n    // Views\n    function lastTimeRewardApplicable() external view returns (uint256);\n\n    function rewardPerToken() external view returns (uint256);\n\n    function earned(address account) external view returns (uint256);\n\n    function getRewardForDuration() external view returns (uint256);\n\n    function totalSupply() external view returns (uint256);\n\n    function balanceOf(address account) external view returns (uint256);\n\n    // Mutative\n\n    function stake(uint256 amount) external;\n\n    function withdraw(uint256 amount) external;\n\n    function getReward() external;\n\n    function exit() external;\n}\n","keccak256":"0xa133e7260d059f95f2bc5b1dfff4f2d6b6edf6281b9488f127a73f60a039ce4d","license":"MIT"}},"version":1}