creation_sourcecode: {{
    "language": "Solidity",
    "sources": {
      "@openzeppelin/contracts/access/Ownable.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.sol\";\n\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() {\n        _transferOwnership(_msgSender());\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        _checkOwner();\n        _;\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 the sender is not the owner.\n     */\n    function _checkOwner() internal view virtual {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\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        _transferOwnership(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        _transferOwnership(newOwner);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Internal function without access restriction.\n     */\n    function _transferOwnership(address newOwner) internal virtual {\n        address oldOwner = _owner;\n        _owner = newOwner;\n        emit OwnershipTransferred(oldOwner, newOwner);\n    }\n}\n"
      },
      "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)\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 making it call a\n     * `private` function that does the actual work.\n     */\n    modifier nonReentrant() {\n        _nonReentrantBefore();\n        _;\n        _nonReentrantAfter();\n    }\n\n    function _nonReentrantBefore() private {\n        // On the first call to nonReentrant, _status will be _NOT_ENTERED\n        require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n        // Any calls to nonReentrant after this point will fail\n        _status = _ENTERED;\n    }\n\n    function _nonReentrantAfter() private {\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"
      },
      "@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n */\ninterface IERC20Permit {\n    /**\n     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n     * given ``owner``'s signed approval.\n     *\n     * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n     * ordering also apply here.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `deadline` must be a timestamp in the future.\n     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n     * over the EIP712-formatted function arguments.\n     * - the signature must use ``owner``'s current nonce (see {nonces}).\n     *\n     * For more information on the signature format, see the\n     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n     * section].\n     */\n    function permit(\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external;\n\n    /**\n     * @dev Returns the current nonce for `owner`. This value must be\n     * included whenever a signature is generated for {permit}.\n     *\n     * Every successful call to {permit} increases ``owner``'s nonce by one. This\n     * prevents a signature from being used multiple times.\n     */\n    function nonces(address owner) external view returns (uint256);\n\n    /**\n     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n     */\n    // solhint-disable-next-line func-name-mixedcase\n    function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../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"
      },
      "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\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 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    /**\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 `to`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address to, 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 `from` to `to` 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 from,\n        address to,\n        uint256 amount\n    ) external returns (bool);\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../extensions/draft-IERC20Permit.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 Address for address;\n\n    function safeTransfer(\n        IERC20 token,\n        address to,\n        uint256 value\n    ) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    function safeTransferFrom(\n        IERC20 token,\n        address from,\n        address to,\n        uint256 value\n    ) 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(\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        require(\n            (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(\n        IERC20 token,\n        address spender,\n        uint256 value\n    ) internal {\n        uint256 newAllowance = token.allowance(address(this), spender) + value;\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\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(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n            uint256 newAllowance = oldAllowance - value;\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n        }\n    }\n\n    function safePermit(\n        IERC20Permit token,\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal {\n        uint256 nonceBefore = token.nonces(owner);\n        token.permit(owner, spender, value, deadline, v, r, s);\n        uint256 nonceAfter = token.nonces(owner);\n        require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\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) {\n            // Return data is optional\n            require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n        }\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/Address.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\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     * [IMPORTANT]\n     * ====\n     * You shouldn't rely on `isContract` to protect against flash loan attacks!\n     *\n     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n     * constructor.\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize/address.code.length, which returns 0\n        // for contracts in construction, since the code is only stored at the end\n        // of the constructor execution.\n\n        return account.code.length > 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        (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 functionCallWithValue(target, data, 0, \"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 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(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResultFromTarget(target, 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(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResultFromTarget(target, 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(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n     *\n     * _Available since v4.8._\n     */\n    function verifyCallResultFromTarget(\n        address target,\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        if (success) {\n            if (returndata.length == 0) {\n                // only check isContract if the call was successful and the return data is empty\n                // otherwise we already know that it was a contract\n                require(isContract(target), \"Address: call to non-contract\");\n            }\n            return returndata;\n        } else {\n            _revert(returndata, errorMessage);\n        }\n    }\n\n    /**\n     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason or using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            _revert(returndata, errorMessage);\n        }\n    }\n\n    function _revert(bytes memory returndata, string memory errorMessage) private pure {\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            /// @solidity memory-safe-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"
      },
      "@openzeppelin/contracts/utils/Context.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^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 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) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n}\n"
      },
      "contracts/libs/IBrewlabsAggregator.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\ninterface IBrewlabsAggregator {\n    struct Trade {\n        uint256 amountIn;\n        uint256 amountOut;\n        address[] path;\n        address[] adapters;\n    }\n\n    struct FormattedOffer {\n        uint256[] amounts;\n        address[] adapters;\n        address[] path;\n        uint256 gasEstimate;\n    }\n\n    function WNATIVE() external view returns (address);\n    function BREWS_FEE() external view returns (uint256);\n    function findBestPath(uint256 _amountIn, address _tokenIn, address _tokenOut, uint256 _maxSteps)\n        external\n        view\n        returns (FormattedOffer memory);\n    function swapNoSplit(Trade memory _trade, address _to, uint256 _deadline) external;\n    function swapNoSplitFromETH(Trade memory _trade, address _to, uint256 _deadline) external payable;\n    function swapNoSplitToETH(Trade memory _trade, address _to, uint256 _deadline) external;\n}\n"
      },
      "contracts/libs/IWETH.sol": {
        "content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.5.0;\n\ninterface IWETH {\n    function deposit() external payable;\n    function transfer(address to, uint256 value) external returns (bool);\n    function withdraw(uint256) external;\n}\n"
      },
      "contracts/pool/BrewlabsStakingImpl.sol": {
        "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport {Ownable} from \"@openzeppelin/contracts/access/Ownable.sol\";\nimport {IERC20Metadata} from \"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\";\nimport {ReentrancyGuard} from \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport {SafeERC20, IERC20} from \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\n\nimport {IBrewlabsAggregator} from \"../libs/IBrewlabsAggregator.sol\";\nimport {IWETH} from \"../libs/IWETH.sol\";\n\ninterface WhiteList {\n    function whitelisted(address _address) external view returns (bool);\n}\n\ncontract BrewlabsStakingImpl is Ownable, ReentrancyGuard {\n    using SafeERC20 for IERC20;\n\n    // Whether it is initialized\n    bool public isInitialized;\n\n    uint256 private PERCENT_PRECISION;\n    uint256 private BLOCKS_PER_DAY;\n    uint256 public PRECISION_FACTOR;\n    uint256 public PRECISION_FACTOR_REFLECTION;\n    uint256 public MAX_FEE;\n\n    address public WNATIVE;\n\n    // The staked token\n    IERC20 public stakingToken;\n    IERC20 public rewardToken;\n    // The dividend token of staking token\n    address public dividendToken;\n\n    bool public hasDividend;\n    bool public autoAdjustableForRewardRate = false;\n\n    uint256 public duration;\n    // The block number when staking starts.\n    uint256 public startBlock;\n    // The block number when staking ends.\n    uint256 public bonusEndBlock;\n    // tokens created per block.\n    uint256 public rewardPerBlock;\n    // The block number of the last pool update\n    uint256 public lastRewardBlock;\n    // Accrued token per share\n    uint256 public accTokenPerShare;\n    uint256 public accDividendPerShare;\n    // The deposit & withdraw fee\n    uint256 public depositFee;\n    uint256 public withdrawFee;\n\n    address public walletA;\n    address public treasury;\n    uint256 public performanceFee;\n\n    address public factory;\n    address public deployer;\n    address public operator;\n\n    // Whether a limit is set for users\n    bool public hasUserLimit;\n    // The pool limit (0 if none)\n    uint256 public poolLimitPerUser;\n    address public whiteList;\n\n    IBrewlabsAggregator public swapAggregator;\n\n    struct UserInfo {\n        uint256 amount; // How many staked tokens the user has provided\n        uint256 rewardDebt; // Reward debt\n        uint256 reflectionDebt; // Reflection debt\n    }\n\n    // Info of each user that stakes tokens (stakingToken)\n    mapping(address => UserInfo) public userInfo;\n\n    uint256 public totalStaked;\n    uint256 private totalEarned;\n    uint256 private totalReflections;\n    uint256 private reflections;\n\n    uint256 public paidRewards;\n    uint256 private shouldTotalPaid;\n\n    event Deposit(address indexed user, uint256 amount);\n    event Withdraw(address indexed user, uint256 amount);\n    event Claim(address indexed user, uint256 amount);\n    event ClaimDividend(address indexed user, uint256 amount);\n    event Compound(address indexed user, uint256 amount);\n    event CompoundDividend(address indexed user, uint256 amount);\n    event EmergencyWithdraw(address indexed user, uint256 amount);\n    event AdminTokenRecovered(address tokenRecovered, uint256 amount);\n\n    event NewStartAndEndBlocks(uint256 startBlock, uint256 endBlock);\n    event NewRewardPerBlock(uint256 rewardPerBlock);\n    event RewardsStop(uint256 blockNumber);\n    event EndBlockChanged(uint256 blockNumber);\n    event UpdatePoolLimit(uint256 poolLimitPerUser, bool hasLimit);\n\n    event ServiceInfoChanged(address _addr, uint256 _fee);\n    event WalletAUpdated(address _addr);\n    event DurationChanged(uint256 _duration);\n    event OperatorTransferred(address oldOperator, address newOperator);\n    event SetAutoAdjustableForRewardRate(bool status);\n    event SetWhiteList(address _whitelist);\n    event SetSwapAggregator(address aggregator);\n\n    modifier onlyAdmin() {\n        require(msg.sender == owner() || msg.sender == operator, \"Caller is not owner or operator\");\n        _;\n    }\n\n    constructor() {}\n\n    /**\n     * @notice Initialize the contract\n     * @param _stakingToken: staked token address\n     * @param _rewardToken: earned token address\n     * @param _dividendToken: reflection token address\n     * @param _rewardPerBlock: reward per block (in rewardToken)\n     * @param _depositFee: deposit fee\n     * @param _withdrawFee: withdraw fee\n     * @param _hasDividend: reflection available flag\n     * @param _aggregator: brewlabs swap aggregator\n     * @param _owner: owner address\n     * @param _deployer: deployer address\n     */\n    function initialize(\n        IERC20 _stakingToken,\n        IERC20 _rewardToken,\n        address _dividendToken,\n        uint256 _duration,\n        uint256 _rewardPerBlock,\n        uint256 _depositFee,\n        uint256 _withdrawFee,\n        bool _hasDividend,\n        address _aggregator,\n        address _owner,\n        address _deployer\n    ) external {\n        require(!isInitialized, \"Already initialized\");\n        require(owner() == address(0x0) || msg.sender == owner(), \"Not allowed\");\n\n        // Make this contract initialized\n        isInitialized = true;\n\n        PERCENT_PRECISION = 10000;\n        BLOCKS_PER_DAY = 7120;\n        MAX_FEE = 2000;\n\n        duration = 365; // 365 days\n        if (_duration > 0) duration = _duration;\n\n        treasury = 0x5Ac58191F3BBDF6D037C6C6201aDC9F99c93C53A;\n        performanceFee = 0.0035 ether;\n\n        stakingToken = _stakingToken;\n        rewardToken = _rewardToken;\n        dividendToken = _dividendToken;\n        hasDividend = _hasDividend;\n\n        rewardPerBlock = _rewardPerBlock;\n\n        require(_depositFee <= MAX_FEE, \"Invalid deposit fee\");\n        require(_withdrawFee <= MAX_FEE, \"Invalid withdraw fee\");\n\n        depositFee = _depositFee;\n        withdrawFee = _withdrawFee;\n\n        factory = msg.sender;\n        deployer = _deployer;\n        operator = _deployer;\n\n        walletA = _deployer;\n\n        uint256 decimalsRewardToken = uint256(IERC20Metadata(address(rewardToken)).decimals());\n        require(decimalsRewardToken < 30, \"Must be inferior to 30\");\n        PRECISION_FACTOR = uint256(10 ** (40 - decimalsRewardToken));\n\n        uint256 decimalsdividendToken = 18;\n        if (address(dividendToken) != address(0x0)) {\n            decimalsdividendToken = uint256(IERC20Metadata(address(dividendToken)).decimals());\n            require(decimalsdividendToken < 30, \"Must be inferior to 30\");\n        }\n        PRECISION_FACTOR_REFLECTION = uint256(10 ** (40 - decimalsdividendToken));\n\n        swapAggregator = IBrewlabsAggregator(_aggregator);\n        WNATIVE = swapAggregator.WNATIVE();\n\n        _transferOwnership(_owner);\n    }\n\n    /**\n     * @notice Deposit staked tokens and collect reward tokens (if any)\n     * @param _amount: amount to stake (in staking token)\n     */\n    function deposit(uint256 _amount) external payable nonReentrant {\n        require(startBlock > 0 && startBlock < block.number, \"Staking hasn't started yet\");\n        require(_amount > 0, \"Amount should be greator than 0\");\n        if (whiteList != address(0x0)) {\n            require(WhiteList(whiteList).whitelisted(msg.sender), \"not whitelisted\");\n        }\n\n        UserInfo storage user = userInfo[msg.sender];\n\n        if (hasUserLimit) {\n            require(_amount + user.amount <= poolLimitPerUser, \"User amount above limit\");\n        }\n\n        _transferPerformanceFee();\n        _updatePool();\n\n        if (user.amount > 0) {\n            uint256 pending = (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;\n            if (pending > 0) {\n                require(availableRewardTokens() >= pending, \"Insufficient reward tokens\");\n                rewardToken.safeTransfer(address(msg.sender), pending);\n\n                totalEarned = totalEarned > pending ? totalEarned - pending : 0;\n                paidRewards = paidRewards + pending;\n                emit Claim(msg.sender, pending);\n            }\n\n            uint256 pendingReflection =\n                (user.amount * accDividendPerShare) / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;\n\n            if (pendingReflection > 0 && hasDividend) {\n                uint256 _pendingReflection = estimateDividendAmount(pendingReflection);\n                totalReflections = totalReflections - pendingReflection;\n                if (address(dividendToken) == address(0x0)) {\n                    payable(msg.sender).transfer(_pendingReflection);\n                } else {\n                    IERC20(dividendToken).safeTransfer(address(msg.sender), _pendingReflection);\n                }\n                emit ClaimDividend(msg.sender, _pendingReflection);\n            }\n        }\n\n        uint256 beforeAmount = stakingToken.balanceOf(address(this));\n        stakingToken.safeTransferFrom(address(msg.sender), address(this), _amount);\n        uint256 afterAmount = stakingToken.balanceOf(address(this));\n        uint256 realAmount = afterAmount - beforeAmount;\n        if (realAmount > _amount) realAmount = _amount;\n\n        if (depositFee > 0) {\n            uint256 fee = (realAmount * depositFee) / PERCENT_PRECISION;\n            stakingToken.safeTransfer(walletA, fee);\n            realAmount = realAmount - fee;\n        }\n\n        user.amount = user.amount + realAmount;\n        user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;\n        user.reflectionDebt = (user.amount * accDividendPerShare) / PRECISION_FACTOR_REFLECTION;\n\n        totalStaked = totalStaked + realAmount;\n\n        emit Deposit(msg.sender, realAmount);\n\n        if (autoAdjustableForRewardRate) _updateRewardRate();\n    }\n\n    /**\n     * @notice Withdraw staked tokens and collect reward tokens\n     * @param _amount: amount to withdraw (in staking token)\n     */\n    function withdraw(uint256 _amount) external payable nonReentrant {\n        require(_amount > 0, \"Amount should be greator than 0\");\n\n        UserInfo storage user = userInfo[msg.sender];\n        require(user.amount >= _amount, \"Amount to withdraw too high\");\n\n        _transferPerformanceFee();\n        _updatePool();\n\n        if (user.amount > 0) {\n            uint256 pending = (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;\n            if (pending > 0) {\n                require(availableRewardTokens() >= pending, \"Insufficient reward tokens\");\n                rewardToken.safeTransfer(address(msg.sender), pending);\n\n                totalEarned = totalEarned > pending ? totalEarned - pending : 0;\n                paidRewards = paidRewards + pending;\n                emit Claim(msg.sender, pending);\n            }\n\n            uint256 pendingReflection =\n                (user.amount * accDividendPerShare) / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;\n\n            if (pendingReflection > 0 && hasDividend) {\n                uint256 _pendingReflection = estimateDividendAmount(pendingReflection);\n                totalReflections = totalReflections - pendingReflection;\n                if (address(dividendToken) == address(0x0)) {\n                    payable(msg.sender).transfer(_pendingReflection);\n                } else {\n                    IERC20(dividendToken).safeTransfer(address(msg.sender), _pendingReflection);\n                }\n                emit ClaimDividend(msg.sender, _pendingReflection);\n            }\n        }\n\n        uint256 realAmount = _amount;\n        if (user.amount < _amount) {\n            realAmount = user.amount;\n        }\n\n        user.amount = user.amount - realAmount;\n        totalStaked = totalStaked - realAmount;\n        emit Withdraw(msg.sender, realAmount);\n\n        if (withdrawFee > 0) {\n            uint256 fee = (realAmount * withdrawFee) / PERCENT_PRECISION;\n            stakingToken.safeTransfer(walletA, fee);\n            realAmount = realAmount - fee;\n        }\n\n        stakingToken.safeTransfer(address(msg.sender), realAmount);\n\n        user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;\n        user.reflectionDebt = (user.amount * accDividendPerShare) / PRECISION_FACTOR_REFLECTION;\n\n        if (autoAdjustableForRewardRate) _updateRewardRate();\n    }\n\n    function claimReward() external payable nonReentrant {\n        UserInfo storage user = userInfo[msg.sender];\n\n        _transferPerformanceFee();\n        _updatePool();\n\n        if (user.amount == 0) return;\n\n        uint256 pending = (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;\n        if (pending > 0) {\n            require(availableRewardTokens() >= pending, \"Insufficient reward tokens\");\n            rewardToken.safeTransfer(address(msg.sender), pending);\n\n            if (totalEarned > pending) {\n                totalEarned = totalEarned - pending;\n            } else {\n                totalEarned = 0;\n            }\n            paidRewards = paidRewards + pending;\n            emit Claim(msg.sender, pending);\n        }\n\n        user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;\n    }\n\n    function claimDividend() external payable nonReentrant {\n        require(hasDividend == true, \"No reflections\");\n        UserInfo storage user = userInfo[msg.sender];\n\n        _transferPerformanceFee();\n        _updatePool();\n\n        if (user.amount == 0) return;\n\n        uint256 pendingReflection =\n            (user.amount * accDividendPerShare) / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;\n\n        if (pendingReflection > 0) {\n            uint256 _pendingReflection = estimateDividendAmount(pendingReflection);\n            totalReflections = totalReflections - pendingReflection;\n            if (address(dividendToken) == address(0x0)) {\n                payable(msg.sender).transfer(_pendingReflection);\n            } else {\n                IERC20(dividendToken).safeTransfer(address(msg.sender), _pendingReflection);\n            }\n            emit ClaimDividend(msg.sender, _pendingReflection);\n        }\n\n        user.reflectionDebt = (user.amount * accDividendPerShare) / PRECISION_FACTOR_REFLECTION;\n    }\n\n    function precomputeCompound(bool isDividend)\n        external\n        view\n        returns (IBrewlabsAggregator.FormattedOffer memory offer)\n    {\n        if (!isDividend && address(stakingToken) == address(rewardToken)) return offer;\n        if (isDividend && address(stakingToken) == dividendToken) return offer;\n\n        uint256 pending = isDividend ? pendingDividends(msg.sender) : pendingReward(msg.sender);\n        if (pending == 0) return offer;\n\n        if (!isDividend) {\n            offer = swapAggregator.findBestPath(pending, address(rewardToken), address(stakingToken), 2);\n        } else {\n            offer = swapAggregator.findBestPath(\n                pending, dividendToken == address(0x0) ? WNATIVE : dividendToken, address(stakingToken), 2\n            );\n        }\n    }\n\n    function compoundReward(IBrewlabsAggregator.Trade memory _trade) external payable nonReentrant {\n        UserInfo storage user = userInfo[msg.sender];\n\n        _transferPerformanceFee();\n        _updatePool();\n\n        if (user.amount == 0) return;\n\n        uint256 pending = (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;\n        if (pending > 0) {\n            require(availableRewardTokens() >= pending, \"Insufficient reward tokens\");\n            if (totalEarned > pending) {\n                totalEarned = totalEarned - pending;\n            } else {\n                totalEarned = 0;\n            }\n            paidRewards = paidRewards + pending;\n            emit Compound(msg.sender, pending);\n\n            if (address(stakingToken) != address(rewardToken)) {\n                pending = _safeSwap(pending, address(rewardToken), address(stakingToken), address(this), _trade);\n            }\n\n            if (hasUserLimit) {\n                require(pending + user.amount <= poolLimitPerUser, \"User amount above limit\");\n            }\n\n            totalStaked = totalStaked + pending;\n            user.amount = user.amount + pending;\n            user.reflectionDebt = user.reflectionDebt + (pending * accDividendPerShare) / PRECISION_FACTOR_REFLECTION;\n\n            emit Deposit(msg.sender, pending);\n        }\n\n        user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;\n    }\n\n    function compoundDividend(IBrewlabsAggregator.Trade memory _trade) external payable nonReentrant {\n        require(hasDividend == true, \"No reflections\");\n        UserInfo storage user = userInfo[msg.sender];\n\n        _transferPerformanceFee();\n        _updatePool();\n\n        if (user.amount == 0) return;\n\n        uint256 _pending = (user.amount * accDividendPerShare) / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;\n        uint256 pending = estimateDividendAmount(_pending);\n        totalReflections = totalReflections - _pending;\n        if (pending > 0) {\n            emit CompoundDividend(msg.sender, pending);\n\n            if (address(stakingToken) != address(dividendToken)) {\n                if (address(dividendToken) == address(0x0)) {\n                    IWETH(WNATIVE).deposit{value: pending}();\n\n                    pending = _safeSwap(pending, WNATIVE, address(stakingToken), address(this), _trade);\n                } else {\n                    pending = _safeSwap(pending, dividendToken, address(stakingToken), address(this), _trade);\n                }\n            }\n\n            if (hasUserLimit) {\n                require(pending + user.amount <= poolLimitPerUser, \"User amount above limit\");\n            }\n\n            totalStaked = totalStaked + pending;\n            user.amount = user.amount + pending;\n            user.rewardDebt = user.rewardDebt + (pending * accTokenPerShare) / PRECISION_FACTOR;\n\n            emit Deposit(msg.sender, pending);\n        }\n\n        user.reflectionDebt = (user.amount * accDividendPerShare) / PRECISION_FACTOR_REFLECTION;\n    }\n\n    function _transferPerformanceFee() internal {\n        require(msg.value >= performanceFee, \"should pay small gas to compound or harvest\");\n\n        payable(treasury).transfer(performanceFee);\n        if (msg.value > performanceFee) {\n            payable(msg.sender).transfer(msg.value - performanceFee);\n        }\n    }\n\n    /**\n     * @notice Withdraw staked tokens without caring about rewards\n     * @dev Needs to be for emergency.\n     */\n    function emergencyWithdraw() external nonReentrant {\n        UserInfo storage user = userInfo[msg.sender];\n        uint256 amountToTransfer = user.amount;\n        user.amount = 0;\n        user.rewardDebt = 0;\n        user.reflectionDebt = 0;\n\n        if (amountToTransfer > 0) {\n            stakingToken.safeTransfer(address(msg.sender), amountToTransfer);\n            totalStaked = totalStaked - amountToTransfer;\n        }\n\n        emit EmergencyWithdraw(msg.sender, amountToTransfer);\n    }\n\n    /**\n     * @notice Available amount of reward token\n     */\n    function availableRewardTokens() public view returns (uint256) {\n        if (address(rewardToken) == address(dividendToken)) return totalEarned;\n\n        uint256 _amount = rewardToken.balanceOf(address(this));\n        if (address(rewardToken) == address(stakingToken)) {\n            if (_amount < totalStaked) return 0;\n            return _amount - totalStaked;\n        }\n\n        return _amount;\n    }\n\n    /**\n     * @notice Available amount of reflection token\n     */\n    function availableDividendTokens() public view returns (uint256) {\n        if (address(dividendToken) == address(0x0)) {\n            return address(this).balance;\n        }\n\n        uint256 _amount = IERC20(dividendToken).balanceOf(address(this));\n\n        if (address(dividendToken) == address(rewardToken)) {\n            if (_amount < totalEarned) return 0;\n            _amount = _amount - totalEarned;\n        }\n\n        if (address(dividendToken) == address(stakingToken)) {\n            if (_amount < totalStaked) return 0;\n            _amount = _amount - totalStaked;\n        }\n\n        return _amount;\n    }\n\n    function insufficientRewards() public view returns (uint256) {\n        uint256 adjustedShouldTotalPaid = shouldTotalPaid;\n        uint256 remainRewards = availableRewardTokens() + paidRewards;\n\n        if (startBlock == 0) {\n            adjustedShouldTotalPaid = adjustedShouldTotalPaid + rewardPerBlock * duration * BLOCKS_PER_DAY;\n        } else {\n            uint256 remainBlocks = _getMultiplier(lastRewardBlock, bonusEndBlock);\n            adjustedShouldTotalPaid = adjustedShouldTotalPaid + rewardPerBlock * remainBlocks;\n        }\n\n        if (remainRewards >= adjustedShouldTotalPaid) return 0;\n\n        return adjustedShouldTotalPaid - remainRewards;\n    }\n\n    /**\n     * @notice View function to see pending reward on frontend.\n     * @param _user: user address\n     * @return Pending reward for a given user\n     */\n    function pendingReward(address _user) public view returns (uint256) {\n        UserInfo memory user = userInfo[_user];\n\n        uint256 adjustedTokenPerShare = accTokenPerShare;\n        if (block.number > lastRewardBlock && totalStaked != 0 && lastRewardBlock > 0) {\n            uint256 multiplier = _getMultiplier(lastRewardBlock, block.number);\n            uint256 rewards = multiplier * rewardPerBlock;\n\n            adjustedTokenPerShare = accTokenPerShare + ((rewards * PRECISION_FACTOR) / totalStaked);\n        }\n\n        return (user.amount * adjustedTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;\n    }\n\n    function pendingDividends(address _user) public view returns (uint256) {\n        if (totalStaked == 0) return 0;\n\n        UserInfo memory user = userInfo[_user];\n\n        uint256 reflectionAmount = availableDividendTokens();\n        if (reflectionAmount > totalReflections) {\n            reflectionAmount -= totalReflections;\n        } else {\n            reflectionAmount = 0;\n        }\n\n        uint256 sTokenBal = totalStaked;\n        uint256 eTokenBal = availableRewardTokens();\n        if (address(stakingToken) == address(rewardToken)) {\n            sTokenBal = sTokenBal + eTokenBal;\n        }\n\n        uint256 adjustedReflectionPerShare =\n            accDividendPerShare + ((reflectionAmount * PRECISION_FACTOR_REFLECTION) / sTokenBal);\n\n        uint256 pendingReflection =\n            (user.amount * adjustedReflectionPerShare) / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;\n\n        return pendingReflection;\n    }\n\n    /**\n     * Admin Methods\n     */\n    function harvestTo(address _treasury) external onlyAdmin {\n        _updatePool();\n\n        if (reflections > 0) {\n            if (address(dividendToken) == address(0x0)) {\n                payable(_treasury).transfer(estimateDividendAmount(reflections));\n            } else {\n                IERC20(dividendToken).safeTransfer(_treasury, estimateDividendAmount(reflections));\n            }\n\n            totalReflections = totalReflections - reflections;\n            reflections = 0;\n        }\n    }\n\n    /**\n     * @notice Deposit reward token\n     * @dev Only call by owner. Needs to be for deposit of reward token when reflection token is same with reward token.\n     */\n    function depositRewards(uint256 _amount) external onlyAdmin nonReentrant {\n        require(_amount > 0, \"invalid amount\");\n\n        uint256 beforeAmt = rewardToken.balanceOf(address(this));\n        rewardToken.safeTransferFrom(msg.sender, address(this), _amount);\n        uint256 afterAmt = rewardToken.balanceOf(address(this));\n\n        totalEarned = totalEarned + afterAmt - beforeAmt;\n    }\n\n    function increaseEmissionRate(uint256 _amount) external onlyAdmin {\n        require(startBlock > 0, \"pool is not started\");\n        require(bonusEndBlock > block.number, \"pool was already finished\");\n        require(_amount > 0, \"invalid amount\");\n\n        _updatePool();\n\n        uint256 beforeAmt = rewardToken.balanceOf(address(this));\n        rewardToken.safeTransferFrom(msg.sender, address(this), _amount);\n        uint256 afterAmt = rewardToken.balanceOf(address(this));\n\n        totalEarned = totalEarned + afterAmt - beforeAmt;\n        _updateRewardRate();\n    }\n\n    function _updateRewardRate() internal {\n        if (bonusEndBlock <= block.number) return;\n\n        uint256 remainRewards = availableRewardTokens() + paidRewards;\n        if (remainRewards > shouldTotalPaid) {\n            remainRewards = remainRewards - shouldTotalPaid;\n\n            uint256 remainBlocks = bonusEndBlock - block.number;\n            rewardPerBlock = remainRewards / remainBlocks;\n            emit NewRewardPerBlock(rewardPerBlock);\n        }\n    }\n\n    /**\n     * @notice Withdraw reward token\n     * @dev Only callable by owner. Needs to be for emergency.\n     */\n    function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {\n        require(block.number > bonusEndBlock, \"Pool is running\");\n        require(availableRewardTokens() >= _amount, \"Insufficient reward tokens\");\n\n        if (_amount == 0) _amount = availableRewardTokens();\n        rewardToken.safeTransfer(address(msg.sender), _amount);\n\n        if (totalEarned > 0) {\n            if (_amount > totalEarned) {\n                totalEarned = 0;\n            } else {\n                totalEarned = totalEarned - _amount;\n            }\n        }\n    }\n\n    /**\n     * @notice It allows the admin to recover wrong tokens sent to the contract\n     * @param _token: the address of the token to withdraw\n     * @param _amount: the number of tokens to withdraw\n     * @dev This function is only callable by admin.\n     */\n    function rescueTokens(address _token, uint256 _amount) external onlyOwner {\n        require(_token != address(rewardToken) || _token == dividendToken, \"Cannot be reward token\");\n\n        if (_token == address(stakingToken)) {\n            uint256 tokenBal = stakingToken.balanceOf(address(this));\n            require(_amount <= tokenBal - totalStaked, \"Insufficient balance\");\n        }\n\n        if (_token == address(0x0)) {\n            payable(msg.sender).transfer(_amount);\n        } else {\n            IERC20(_token).safeTransfer(address(msg.sender), _amount);\n        }\n\n        emit AdminTokenRecovered(_token, _amount);\n    }\n\n    function startReward() external onlyAdmin {\n        require(startBlock == 0, \"Pool was already started\");\n        require(insufficientRewards() == 0, \"All reward tokens have not been deposited\");\n\n        startBlock = block.number + 100;\n        bonusEndBlock = startBlock + duration * BLOCKS_PER_DAY;\n        lastRewardBlock = startBlock;\n\n        emit NewStartAndEndBlocks(startBlock, bonusEndBlock);\n    }\n\n    function stopReward() external onlyAdmin {\n        _updatePool();\n\n        uint256 remainRewards = availableRewardTokens() + paidRewards;\n        if (remainRewards > shouldTotalPaid) {\n            remainRewards = remainRewards - shouldTotalPaid;\n            rewardToken.safeTransfer(msg.sender, remainRewards);\n\n            if (totalEarned > remainRewards) {\n                totalEarned = totalEarned - remainRewards;\n            } else {\n                totalEarned = 0;\n            }\n        }\n\n        bonusEndBlock = block.number;\n        emit RewardsStop(bonusEndBlock);\n    }\n\n    function updateEndBlock(uint256 _endBlock) external onlyAdmin {\n        require(startBlock > 0, \"Pool is not started\");\n        require(bonusEndBlock > block.number, \"Pool was already finished\");\n        require(_endBlock > block.number && _endBlock > startBlock, \"Invalid end block\");\n        bonusEndBlock = _endBlock;\n        emit EndBlockChanged(_endBlock);\n    }\n\n    /**\n     * @notice Update pool limit per user\n     * @dev Only callable by owner.\n     * @param _hasUserLimit: whether the limit remains forced\n     * @param _poolLimitPerUser: new pool limit per user\n     */\n    function updatePoolLimitPerUser(bool _hasUserLimit, uint256 _poolLimitPerUser) external onlyOwner {\n        if (_hasUserLimit) {\n            require(_poolLimitPerUser > poolLimitPerUser, \"New limit must be higher\");\n            poolLimitPerUser = _poolLimitPerUser;\n        } else {\n            poolLimitPerUser = 0;\n        }\n        hasUserLimit = _hasUserLimit;\n\n        emit UpdatePoolLimit(poolLimitPerUser, hasUserLimit);\n    }\n\n    /**\n     * @notice Update reward per block\n     * @dev Only callable by owner.\n     * @param _rewardPerBlock: the reward per block\n     */\n    function updateRewardPerBlock(uint256 _rewardPerBlock) external onlyAdmin {\n        // require(block.number < startBlock, \"Pool was already started\");\n        _updatePool();\n\n        rewardPerBlock = _rewardPerBlock;\n        emit NewRewardPerBlock(_rewardPerBlock);\n    }\n\n    function setServiceInfo(address _treasury, uint256 _fee) external {\n        require(msg.sender == treasury, \"setServiceInfo: FORBIDDEN\");\n        require(_treasury != address(0x0), \"Invalid address\");\n\n        treasury = _treasury;\n        performanceFee = _fee;\n\n        emit ServiceInfoChanged(_treasury, _fee);\n    }\n\n    function updateWalletA(address _walletA) external onlyOwner {\n        require(_walletA != address(0x0) || _walletA != walletA, \"Invalid address\");\n\n        walletA = _walletA;\n        emit WalletAUpdated(_walletA);\n    }\n\n    function setDuration(uint256 _duration) external onlyOwner {\n        require(_duration >= 30, \"lower limit reached\");\n\n        duration = _duration;\n        if (startBlock > 0) {\n            bonusEndBlock = startBlock + duration * BLOCKS_PER_DAY;\n            require(bonusEndBlock > block.number, \"invalid duration\");\n        }\n        emit DurationChanged(_duration);\n    }\n\n    function setAutoAdjustableForRewardRate(bool _status) external onlyOwner {\n        autoAdjustableForRewardRate = _status;\n        emit SetAutoAdjustableForRewardRate(_status);\n    }\n\n    function transferOperator(address _operator) external onlyAdmin {\n        require(_operator != address(0x0), \"invalid address\");\n        emit OperatorTransferred(operator, _operator);\n        operator = _operator;\n    }\n\n    /**\n     * @notice Update swap aggregator.\n     * @param _aggregator: swap Aggregator address\n     */\n    function setSwapAggregator(address _aggregator) external onlyOwner {\n        require(_aggregator != address(0x0), \"Invalid address\");\n        require(IBrewlabsAggregator(_aggregator).WNATIVE() != address(0x0), \"Invalid swap aggregator\");\n\n        swapAggregator = IBrewlabsAggregator(_aggregator);\n        WNATIVE = IBrewlabsAggregator(_aggregator).WNATIVE();\n        emit SetSwapAggregator(_aggregator);\n    }\n\n    function setWhitelist(address _whitelist) external onlyOwner {\n        whiteList = _whitelist;\n        emit SetWhiteList(_whitelist);\n    }\n\n    /**\n     * @notice Update reward variables of the given pool to be up-to-date.\n     */\n    function _updatePool() internal {\n        // calc reflection rate\n        if (totalStaked > 0 && hasDividend) {\n            uint256 reflectionAmount = availableDividendTokens();\n            if (reflectionAmount > totalReflections) {\n                reflectionAmount -= totalReflections;\n            } else {\n                reflectionAmount = 0;\n            }\n\n            uint256 sTokenBal = totalStaked;\n            uint256 eTokenBal = availableRewardTokens();\n            if (address(stakingToken) == address(rewardToken)) {\n                sTokenBal = sTokenBal + eTokenBal;\n            }\n\n            accDividendPerShare += (reflectionAmount * PRECISION_FACTOR_REFLECTION) / sTokenBal;\n\n            reflections += (reflectionAmount * eTokenBal) / sTokenBal;\n            totalReflections += reflectionAmount;\n        }\n\n        if (block.number <= lastRewardBlock || lastRewardBlock == 0) return;\n        if (totalStaked == 0) {\n            lastRewardBlock = block.number;\n            return;\n        }\n\n        uint256 multiplier = _getMultiplier(lastRewardBlock, block.number);\n        uint256 _reward = multiplier * rewardPerBlock;\n        accTokenPerShare += (_reward * PRECISION_FACTOR) / totalStaked;\n\n        lastRewardBlock = block.number;\n        shouldTotalPaid = shouldTotalPaid + _reward;\n    }\n\n    function estimateDividendAmount(uint256 amount) internal view returns (uint256) {\n        uint256 dTokenBal = availableDividendTokens();\n        if (amount > totalReflections) amount = totalReflections;\n        if (amount > dTokenBal) amount = dTokenBal;\n        return amount;\n    }\n\n    /**\n     * @notice Return reward multiplier over the given _from to _to block.\n     * @param _from: block to start\n     * @param _to: block to finish\n     */\n    function _getMultiplier(uint256 _from, uint256 _to) internal view returns (uint256) {\n        if (_to <= bonusEndBlock) {\n            return _to - _from;\n        } else if (_from >= bonusEndBlock) {\n            return 0;\n        } else {\n            return bonusEndBlock - _from;\n        }\n    }\n\n    function _safeSwap(\n        uint256 _amountIn,\n        address _fromToken,\n        address _toToken,\n        address _to,\n        IBrewlabsAggregator.Trade memory _trade\n    ) internal returns (uint256) {\n        IERC20(_fromToken).safeApprove(address(swapAggregator), _amountIn);\n\n        uint256 beforeAmount = IERC20(_toToken).balanceOf(_to);\n        _trade.amountIn = _amountIn;\n        swapAggregator.swapNoSplit(_trade, _to, block.timestamp + 600);\n        uint256 afterAmount = IERC20(_toToken).balanceOf(_to);\n\n        return afterAmount - beforeAmount;\n    }\n\n    receive() external payable {}\n}\n"
      }
    },
    "settings": {
      "optimizer": {
        "enabled": true,
        "runs": 100
      },
      "outputSelection": {
        "*": {
          "*": [
            "evm.bytecode",
            "evm.deployedBytecode",
            "devdoc",
            "userdoc",
            "metadata",
            "abi"
          ]
        }
      },
      "metadata": {
        "useLiteralContent": true
      },
      "libraries": {}
    }
  }}