Contract 0x5FCDfD5634c50CCcEf6275a239207B09Bd0379df 1

/**
 *Submitted for verification at arbiscan.io on 2021-08-31
*/

// SPDX-License-Identifier: GPL
pragma solidity 0.7.4;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMathUpgradeable {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721Upgradeable is IERC165Upgradeable {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data)
        internal
        view
        returns (bytes memory)
    {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20Upgradeable {
    using SafeMathUpgradeable for uint256;
    using AddressUpgradeable for address;

    function safeTransfer(
        IERC20Upgradeable token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20Upgradeable token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
        );
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
        );
    }

    function safeDecreaseAllowance(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(
            value,
            "SafeERC20: decreased allowance below zero"
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
        );
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20Upgradeable token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(
            data,
            "SafeERC20: low-level call failed"
        );
        if (returndata.length > 0) {
            // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSetUpgradeable {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            bytes32 lastvalue = set._values[lastIndex];

            // Move the last value to the index where the value to delete is
            set._values[toDeleteIndex] = lastvalue;
            // Update the index for the moved value
            set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        require(set._values.length > index, "EnumerableSet: index out of bounds");
        return set._values[index];
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

// solhint-disable-next-line compiler-version
/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        require(
            _initializing || _isConstructor() || !_initialized,
            "Initializable: contract is already initialized"
        );

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

    /// @dev Returns true if and only if the function is running in the constructor
    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuardUpgradeable is Initializable {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    function __ReentrancyGuard_init() internal initializer {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal initializer {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
    uint256[49] private __gap;
}

interface ICaptureNotifyRecipient {
    /**
     * @notice Value capture handler.
     */
    function onValueCaptured(uint256 totalCapturedUSD, uint256 lastCapturedBlock) external;
}

interface IUSDConvertor {
    function tokenIn() external view returns (address);

    function tokenOut() external view returns (address);

    function exchangeForUSD(uint256 amountIn) external returns (uint256 amountOut);
}

interface IAuthenticator {
    /**
     * @notice  Check if an account has the given role.
     * @param   role    A bytes32 value generated from keccak256("ROLE_NAME").
     * @param   account The account to be checked.
     * @return  True if the account has already granted permissions for the given role.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @notice  This should be called from external contract, to test if a account has specified role.

     * @param   role    A bytes32 value generated from keccak256("ROLE_NAME").
     * @param   account The account to be checked.
     * @return  True if the account has already granted permissions for the given role.
     */
    function hasRoleOrAdmin(bytes32 role, address account) external view returns (bool);
}

interface IValueCapture {
    function totalCapturedUSD() external view returns (uint256);

    function lastCapturedBlock() external view returns (uint256);

    function getCapturedValue()
        external
        view
        returns (uint256 totalCapturedUSD_, uint256 lastCapturedBlock_);

    /**
     * @notice Set receiver of value captured events.
     */
    function setCaptureNotifyRecipient(address newRecipient) external;

    /**
     * @notice  Return all addresses of USD tokens in whitelist as an array.
     */
    function listUSDTokens(uint256 begin, uint256 end)
        external
        view
        returns (address[] memory result);

    /**
     * @notice  Add a USD token to whitelist.
     *          Since not all the ERC20 has decimals interface, caller needs to specify the decimal of USD token.
     *          But the `decimals()` of token will be checked to match the parameter passed in if possible.
     *
     * @param   token       The address of usd token to be put into whitelist.
     * @param   decimals    The decimals of token.
     */
    function addUSDToken(address token, uint256 decimals) external;

    /**
     * @notice  Remove a USD token from whitelist.
     *
     * @param   token   The address of USD token to remove.
     */
    function removeUSDToken(address token) external;

    /**
     * @notice  Add a 'exchange' for some token.
     *          A exchange is known as a external contract who has an interface to accept some kind of token
     *          and return USD token in value capture's whitelist.
     *          That means the output token of exchange must be in th e whitelist.
     *          See contract/interfaces/IUSDConvertor.sol for interface spec of a exchange.
     *
     * @param   token               The address of any token accepted by exchange.
     * @param   exchange_          The address of exchange contract.
     */
    function setExternalExchange(address token, address exchange_) external;

    /**
     * @notice  Batch version of forwardAsset.
     *
     * @param   tokens      The array of address of token to forward to vault.
     * @param   amountsIn   The array of amounts to (exchange for USD and) forward to vault.
     */
    function forwardMultiAssets(address[] memory tokens, uint256[] memory amountsIn) external;

    /**
     * @notice  This method has the same usage as `forwardERC20Token`.
     *
     *          *Asset sent though this method to vault will not affect mintable amount of MCB.*
     */
    function forwardETH(uint256 amount) external;

    /**
     * @notice  This method is should not be called if there are any exchange available for given ERC20 token.
     *          But if there is really not, or the exchange is lack of enough liquidity,
     *          guardian will be able to send the asset to vault for other usage.
     *
     *          *Asset sent though this method to vault will not affect mintable amount of MCB.*
     */
    function forwardERC20Token(address token, uint256 amount) external;

    /**
     * @notice  This method has the same usage as `forwardERC20Token`.
     *
     *          *Asset sent though this method to vault will not affect mintable amount of MCB.*
     */
    function forwardERC721Token(address token, uint256 tokenID) external;
}

interface IDecimals {
    function decimals() external view returns (uint8);
}
contract ValueCapture is Initializable, ReentrancyGuardUpgradeable, IValueCapture {
    using SafeMathUpgradeable for uint256;
    using AddressUpgradeable for address;
    using SafeERC20Upgradeable for IERC20Upgradeable;
    using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;

    uint256 public constant SYSTEM_DECIMALS = 18;
    bytes32 public constant VALUE_CAPTURE_ADMIN_ROLE = keccak256("VALUE_CAPTURE_ADMIN_ROLE");

    IAuthenticator public authenticator;
    address public vault;
    address public captureNotifyRecipient;
    uint256 public override totalCapturedUSD;
    uint256 public override lastCapturedBlock;

    EnumerableSetUpgradeable.AddressSet internal _usdTokenList;
    mapping(address => uint256) public normalizers;
    mapping(address => IUSDConvertor) public externalExchanges;

    event AddUSDToken(address indexed usdToken);
    event RemoveUSDToken(address indexed usdToken);
    event SetConvertor(address indexed tokenAddress, address indexed exchange);
    event ExchangeToken(
        address indexed tokenIn,
        uint256 balanceIn,
        address indexed tokenOut,
        uint256 balanceOut
    );
    event ForwardAsset(address indexed tokenOut, uint256 amountOut, uint256 normalizeAmountOut);
    event ForwardETH(uint256 amount);
    event ForwardERC20Token(address indexed tokenOut, uint256 amount);
    event ForwardERC721Token(address indexed tokenOut, uint256 tokenID);
    event SetMiner(address indexed oldMinter, address indexed newMinter);
    event SendValueCaptureNotification(
        address indexed recipient,
        uint256 totalCapturedUSD,
        uint256 lastCapturedBlock
    );

    receive() external payable {}

    modifier onlyAuthorized() {
        require(
            authenticator.hasRoleOrAdmin(VALUE_CAPTURE_ADMIN_ROLE, msg.sender),
            "caller is not authorized"
        );
        _;
    }

    modifier onlyAdmin() {
        require(authenticator.hasRoleOrAdmin(0, msg.sender), "caller is not admin");
        _;
    }

    function getCapturedValue() external view override returns (uint256, uint256) {
        return (totalCapturedUSD, lastCapturedBlock);
    }

    /**
     * @notice  Initialize value capture contract.
     *
     * @param   authenticator_  The address of authenticator controller that can determine who is able to call
     *                          admin interfaces.
     * @param   vault_          The address of vault contract. All funds later will be collected to this address.
     */
    function initialize(address authenticator_, address vault_) external initializer {
        require(vault_ != address(0), "vault is the zero address");
        require(authenticator_.isContract(), "authenticator must be a contract");

        __ReentrancyGuard_init();

        authenticator = IAuthenticator(authenticator_);
        vault = vault_;
    }

    /**
     * @notice Set receiver of value captured events.
     */
    function setCaptureNotifyRecipient(address newRecipient) external override onlyAdmin {
        require(newRecipient != captureNotifyRecipient, "newRecipient is already set");
        emit SetMiner(captureNotifyRecipient, newRecipient);
        captureNotifyRecipient = newRecipient;
    }

    /**
     * @notice  Return all addresses of USD tokens in whitelist as an array.
     */
    function listUSDTokens(uint256 begin, uint256 end)
        external
        view
        override
        returns (address[] memory result)
    {
        require(end > begin, "begin should be lower than end");
        uint256 length = _usdTokenList.length();
        if (begin >= length) {
            return result;
        }
        uint256 safeEnd = (end <= length) ? end : length;
        result = new address[](safeEnd - begin);
        for (uint256 i = begin; i < safeEnd; i++) {
            result[i - begin] = _usdTokenList.at(i);
        }
        return result;
    }

    /**
     * @notice  Add a USD token to whitelist.
     *          Since not all the ERC20 has decimals interface, caller needs to specify the decimal of USD token.
     *          But the `decimals()` of token will be checked to match the parameter passed in if possible.
     *
     * @param   token       The address of usd token to be put into whitelist.
     * @param   decimals    The decimals of token.
     */
    function addUSDToken(address token, uint256 decimals) external override onlyAuthorized {
        require(!_usdTokenList.contains(token), "token already in usd list");
        require(token.isContract(), "token address must be contract");
        require(decimals <= 18, "decimals out of range");
        // verify decimals if possible
        try IDecimals(token).decimals() returns (uint8 actualDecimals) {
            require(actualDecimals == decimals, "decimals not match");
        } catch {}

        bool isAdded = _usdTokenList.add(token);
        require(isAdded, "fail to add token to list");
        normalizers[token] = 10**(SYSTEM_DECIMALS.sub(decimals));

        emit AddUSDToken(token);
    }

    /**
     * @notice  Remove a USD token from whitelist.
     *
     * @param   token   The address of USD token to remove.
     */
    function removeUSDToken(address token) external override onlyAuthorized {
        require(_usdTokenList.contains(token), "token not in usd list");

        bool isRemoved = _usdTokenList.remove(token);
        require(isRemoved, "fail to remove token from list");

        emit RemoveUSDToken(token);
    }

    /**
     * @notice  Add a 'exchange' for some token.
     *          A exchange is known as a external contract who has an interface to accept some kind of token
     *          and return USD token in value capture's whitelist.
     *          That means the output token of exchange must be in th e whitelist.
     *          See contract/interfaces/IUSDConvertor.sol for interface spec of a exchange.
     *
     * @param   token               The address of any token accepted by exchange.
     * @param   exchange_          The address of exchange contract.
     */
    function setExternalExchange(address token, address exchange_)
        external
        override
        onlyAuthorized
    {
        require(exchange_.isContract(), "exchange must be a contract");
        IUSDConvertor exchange = IUSDConvertor(exchange_);
        require(token == exchange.tokenIn(), "input token mismatch");
        require(_usdTokenList.contains(exchange.tokenOut()), "token out is not in usd list");

        externalExchanges[token] = exchange;
        emit SetConvertor(token, exchange_);
    }

    /**
     * @notice  Batch version of forwardAsset.
     *
     * @param   tokens      The array of address of token to forward to vault.
     * @param   amountsIn   The array of amounts to (exchange for USD and) forward to vault.
     */
    function forwardMultiAssets(address[] memory tokens, uint256[] memory amountsIn)
        external
        override
        nonReentrant
        onlyAuthorized
    {
        require(tokens.length == amountsIn.length, "length of parameters mismatch");
        for ((uint256 i, uint256 count) = (0, tokens.length); i < count; i++) {
            _forwardAsset(tokens[i], amountsIn[i]);
        }
        sendCaptureNotification();
    }

    /**
     * @notice  This method has the same usage as `forwardERC20Token`.
     *
     *          *Asset sent though this method to vault will not affect mintable amount of MCB.*
     */
    function forwardETH(uint256 amount) external override onlyAuthorized nonReentrant {
        require(vault != address(0), "vault is not set");
        AddressUpgradeable.sendValue(payable(vault), amount);
        emit ForwardETH(amount);
    }

    /**
     * @notice  This method is should not be called if there are any exchange available for given ERC20 token.
     *          But if there is really not, or the exchange is lack of enough liquidity,
     *          guardian will be able to send the asset to vault for other usage.
     *
     *          *Asset sent though this method to vault will not affect mintable amount of MCB.*
     */
    function forwardERC20Token(address token, uint256 amount)
        external
        override
        onlyAuthorized
        nonReentrant
    {
        require(vault != address(0), "vault is not set");
        IERC20Upgradeable(token).safeTransfer(vault, amount);
        emit ForwardERC20Token(token, amount);
    }

    /**
     * @notice  This method has the same usage as `forwardERC20Token`.
     *
     *          *Asset sent though this method to vault will not affect mintable amount of MCB.*
     */
    function forwardERC721Token(address token, uint256 tokenID)
        external
        override
        onlyAuthorized
        nonReentrant
    {
        require(vault != address(0), "vault is not set");
        IERC721Upgradeable(token).safeTransferFrom(address(this), vault, tokenID);
        emit ForwardERC721Token(token, tokenID);
    }

    /**
     * @notice Try send a notification to recipient.
     */
    function sendCaptureNotification() public onlyAuthorized {
        if (!captureNotifyRecipient.isContract()) {
            return;
        }
        ICaptureNotifyRecipient(captureNotifyRecipient).onValueCaptured(
            totalCapturedUSD,
            lastCapturedBlock
        );
        emit SendValueCaptureNotification(
            captureNotifyRecipient,
            totalCapturedUSD,
            lastCapturedBlock
        );
    }

    function _forwardAsset(address token, uint256 amountIn) internal {
        require(vault != address(0), "vault is not set");
        require(amountIn != 0, "amount in is zero");

        // prepare token to be transfer to vault
        (address tokenOut, uint256 amountOut) = _exchangeTokenForUSD(token, amountIn);
        require(_usdTokenList.contains(tokenOut), "unexpected out token");

        // transfer token to vault && add up the converted amount
        uint256 normalizer = normalizers[tokenOut];
        require(normalizer != 0, "unexpected normalizer");

        uint256 normalizeAmountOut = amountOut.mul(normalizer);
        totalCapturedUSD = totalCapturedUSD.add(normalizeAmountOut);
        lastCapturedBlock = _blockNumber();

        IERC20Upgradeable(tokenOut).safeTransfer(vault, amountOut);

        emit ForwardAsset(tokenOut, amountOut, normalizeAmountOut);
    }

    function _exchangeTokenForUSD(address tokenIn, uint256 amountIn)
        internal
        returns (address tokenOut, uint256 amountOut)
    {
        uint256 tokenInBalance = IERC20Upgradeable(tokenIn).balanceOf(address(this));
        require(amountIn <= tokenInBalance, "amount in exceeds convertable amount");
        if (amountIn == 0) {
            // early revert
            revert("no balance to convert");
        } else if (_usdTokenList.contains(tokenIn)) {
            // if the token to be converted is USD token in whitelist, return the balance
            tokenOut = tokenIn;
            amountOut = amountIn;
        } else {
            IUSDConvertor exchange = externalExchanges[tokenIn];
            require(address(exchange).isContract(), "token exchange is not available");
            require(tokenIn == exchange.tokenIn(), "input token mismatch");
            tokenOut = externalExchanges[tokenIn].tokenOut();

            IERC20Upgradeable(tokenIn).safeIncreaseAllowance(address(exchange), amountIn);
            amountOut = externalExchanges[tokenIn].exchangeForUSD(amountIn);
        }
        require(amountOut > 0, "balance out is 0");
        emit ExchangeToken(tokenIn, amountIn, tokenOut, amountOut);
    }

    function _blockNumber() internal view virtual returns (uint256) {
        return block.number;
    }

    bytes32[50] private __gap;
}

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"usdToken","type":"address"}],"name":"AddUSDToken","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"tokenIn","type":"address"},{"indexed":false,"internalType":"uint256","name":"balanceIn","type":"uint256"},{"indexed":true,"internalType":"address","name":"tokenOut","type":"address"},{"indexed":false,"internalType":"uint256","name":"balanceOut","type":"uint256"}],"name":"ExchangeToken","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"tokenOut","type":"address"},{"indexed":false,"internalType":"uint256","name":"amountOut","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"normalizeAmountOut","type":"uint256"}],"name":"ForwardAsset","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"tokenOut","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"ForwardERC20Token","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"tokenOut","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokenID","type":"uint256"}],"name":"ForwardERC721Token","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"ForwardETH","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"usdToken","type":"address"}],"name":"RemoveUSDToken","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"totalCapturedUSD","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lastCapturedBlock","type":"uint256"}],"name":"SendValueCaptureNotification","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"tokenAddress","type":"address"},{"indexed":true,"internalType":"address","name":"exchange","type":"address"}],"name":"SetConvertor","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"oldMinter","type":"address"},{"indexed":true,"internalType":"address","name":"newMinter","type":"address"}],"name":"SetMiner","type":"event"},{"inputs":[],"name":"SYSTEM_DECIMALS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"VALUE_CAPTURE_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"decimals","type":"uint256"}],"name":"addUSDToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"authenticator","outputs":[{"internalType":"contract IAuthenticator","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"captureNotifyRecipient","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"externalExchanges","outputs":[{"internalType":"contract IUSDConvertor","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"forwardERC20Token","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"tokenID","type":"uint256"}],"name":"forwardERC721Token","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"forwardETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"uint256[]","name":"amountsIn","type":"uint256[]"}],"name":"forwardMultiAssets","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getCapturedValue","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"authenticator_","type":"address"},{"internalType":"address","name":"vault_","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"lastCapturedBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"begin","type":"uint256"},{"internalType":"uint256","name":"end","type":"uint256"}],"name":"listUSDTokens","outputs":[{"internalType":"address[]","name":"result","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"normalizers","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"removeUSDToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sendCaptureNotification","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newRecipient","type":"address"}],"name":"setCaptureNotifyRecipient","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"exchange_","type":"address"}],"name":"setExternalExchange","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalCapturedUSD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vault","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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