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// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>
// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

import "../@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "../assetRecovering/OwnableAssetRecoverer.sol";
import "../access/OwnableWithOperator.sol";
import "../@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "./IOracle.sol";

/**
* @notice Invalid Proof
*/
error Oracle__InvalidProof();

/**
* @title Oracle stores the Merkle root updated regularly
* @dev Leaves are hashes of:
* - feeDistributorInstance address
* - sum of CL rewards earned by all validators of feeDistributorInstance)
*/
contract Oracle is OwnableAssetRecoverer, OwnableWithOperator, ERC165, IOracle {
    bytes32 private s_root;

    /**
    * @notice Set a new oracle report (Merkle root)
    * @param _root Merkle root
    */
    function report(bytes32 _root) external onlyOperatorOrOwner {
        s_root = _root;

        emit Oracle__Reported(_root);
    }

    /**
    * @notice Verify Merkle proof (that the leaf belongs to the tree)
    * @param _proof Merkle proof (the leaf's sibling, and each non-leaf hash that could not otherwise be calculated without additional leaf nodes)
    * @param _feeDistributorInstance feeDistributor instance address
    * @param _amountInGwei total CL rewards earned by all validators in GWei (see _validatorCount)
    */
    function verify(
        bytes32[] calldata _proof,
        address _feeDistributorInstance,
        uint256 _amountInGwei
    ) external view {
        bytes32 leaf = keccak256(bytes.concat(keccak256(abi.encode(_feeDistributorInstance, _amountInGwei))));

        if (!MerkleProof.verify(_proof, s_root, leaf)) {
            revert Oracle__InvalidProof();
        }
    }

    /**
    * @dev See {IERC165-supportsInterface}.
    */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IOracle).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
    * @dev Returns the address of the current owner.
     */
    function owner() public view override(Ownable, OwnableBase, IOwnable) returns (address) {
        return super.owner();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/MerkleProof.sol)

pragma solidity 0.8.10;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The tree and the proofs can be generated using our
 * https://github.com/OpenZeppelin/merkle-tree[JavaScript library].
 * You will find a quickstart guide in the readme.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the merkle tree could be reinterpreted as a leaf value.
 * OpenZeppelin's JavaScript library generates merkle trees that are safe
 * against this attack out of the box.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Calldata version of {verify}
     *
     * _Available since v4.7._
     */
    function verifyCalldata(
        bytes32[] calldata proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Calldata version of {processProof}
     *
     * _Available since v4.7._
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _Available since v4.7._
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Calldata version of {multiProofVerify}
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _Available since v4.7._
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * CAUTION: Not all merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     *
     * _Available since v4.7._
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Calldata version of {processMultiProof}.
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _Available since v4.7._
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>, Lido <[email protected]>
// SPDX-License-Identifier: MIT

// https://github.com/lidofinance/lido-otc-seller/blob/master/contracts/lib/AssetRecoverer.sol
pragma solidity 0.8.10;

import "./OwnableTokenRecoverer.sol";
import "./AssetRecoverer.sol";

/// @title Public Asset Recoverer with public functions callable by assetAccessingAddress
/// @notice Recover ether, ERC20, ERC721 and ERC1155 from a derived contract
abstract contract OwnableAssetRecoverer is OwnableTokenRecoverer, AssetRecoverer {

    // Functions

    /**
     * @notice transfers ether from this contract
     * @dev using `address.call` is safer to transfer to other contracts
     * @param _recipient address to transfer ether to
     * @param _amount amount of ether to transfer
     */
    function transferEther(address _recipient, uint256 _amount) external onlyOwner {
        _transferEther(_recipient, _amount);
    }
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>
// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

import "./Ownable2Step.sol";
import "./IOwnableWithOperator.sol";

/**
* @notice newOperator is the zero address
*/
error Access__ZeroNewOperator();

/**
* @notice newOperator is the same as the old one
*/
error Access__SameOperator(address _operator);

/**
* @notice caller is neither the operator nor owner
*/
error Access__CallerNeitherOperatorNorOwner(address _caller, address _operator, address _owner);

/**
* @notice address is neither the operator nor owner
*/
error Access__AddressNeitherOperatorNorOwner(address _address, address _operator, address _owner);

/**
 * @dev Ownable with an additional role of operator
 */
abstract contract OwnableWithOperator is Ownable2Step, IOwnableWithOperator {
    address private s_operator;

    /**
     * @dev Emits when the operator has been changed
     * @param _previousOperator address of the previous operator
     * @param _newOperator address of the new operator
     */
    event OperatorChanged(
        address indexed _previousOperator,
        address indexed _newOperator
    );

    /**
     * @dev Throws if called by any account other than the operator or the owner.
     */
    modifier onlyOperatorOrOwner() {
        address currentOwner = owner();
        address currentOperator = s_operator;

        if (currentOperator != _msgSender() && currentOwner != _msgSender()) {
            revert Access__CallerNeitherOperatorNorOwner(_msgSender(), currentOperator, currentOwner);
        }

        _;
    }

    function checkOperatorOrOwner(address _address) public view virtual {
        address currentOwner = owner();
        address currentOperator = s_operator;

        if (_address == address(0) || (currentOperator != _address && currentOwner != _address)) {
            revert Access__AddressNeitherOperatorNorOwner(_address, currentOperator, currentOwner);
        }
    }

    /**
     * @dev Returns the current operator.
     */
    function operator() public view virtual returns (address) {
        return s_operator;
    }

    /**
     * @dev Transfers operator to a new account (`newOperator`).
     * Can only be called by the current owner.
     */
    function changeOperator(address _newOperator) external virtual onlyOwner {
        if (_newOperator == address(0)) {
            revert Access__ZeroNewOperator();
        }
        if (_newOperator == s_operator) {
            revert Access__SameOperator(_newOperator);
        }

        _changeOperator(_newOperator);
    }

    /**
     * @dev Transfers operator to a new account (`newOperator`).
     * Internal function without access restriction.
     */
    function _changeOperator(address _newOperator) internal virtual {
        address oldOperator = s_operator;
        s_operator = _newOperator;
        emit OperatorChanged(oldOperator, _newOperator);
    }

    /**
     * @dev Dismisses the old operator without setting a new one.
     * Can only be called by the current owner.
     */
    function dismissOperator() external virtual onlyOwner {
        _changeOperator(address(0));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity 0.8.10;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>
// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

import "../@openzeppelin/contracts/utils/introspection/IERC165.sol";
import "../access/IOwnable.sol";

/**
 * @dev External interface of Oracle declared to support ERC165 detection.
 */
interface IOracle is IOwnable, IERC165 {
    // Events

    /**
    * @notice Emits when a new oracle report (Merkle root) recorded
    * @param _root Merkle root
    */
    event Oracle__Reported(bytes32 indexed _root);

    // Functions

    /**
    * @notice Set a new oracle report (Merkle root)
    * @param _root Merkle root
    */
    function report(bytes32 _root) external;

    /**
    * @notice Verify Merkle proof (that the leaf belongs to the tree)
    * @param _proof Merkle proof (the leaf's sibling, and each non-leaf hash that could not otherwise be calculated without additional leaf nodes)
    * @param _feeDistributorInstance feeDistributor instance address
    * @param _amountInGwei total CL rewards earned by all validators in GWei (see _validatorCount)
    */
    function verify(
        bytes32[] calldata _proof,
        address _feeDistributorInstance,
        uint256 _amountInGwei
    ) external view;
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>, Lido <[email protected]>
// SPDX-License-Identifier: MIT

// https://github.com/lidofinance/lido-otc-seller/blob/master/contracts/lib/AssetRecoverer.sol
pragma solidity 0.8.10;

import "./TokenRecoverer.sol";
import "../access/OwnableBase.sol";

/// @title Token Recoverer with public functions callable by assetAccessingAddress
/// @notice Recover ERC20, ERC721 and ERC1155 from a derived contract
abstract contract OwnableTokenRecoverer is TokenRecoverer, OwnableBase {
    // Functions

    /**
     * @notice transfer an ERC20 token from this contract
     * @dev `SafeERC20.safeTransfer` doesn't always return a bool
     * as it performs an internal `require` check
     * @param _token address of the ERC20 token
     * @param _recipient address to transfer the tokens to
     * @param _amount amount of tokens to transfer
     */
    function transferERC20(
        address _token,
        address _recipient,
        uint256 _amount
    ) external onlyOwner {
        _transferERC20(_token, _recipient, _amount);
    }

    /**
     * @notice transfer an ERC721 token from this contract
     * @dev `IERC721.safeTransferFrom` doesn't always return a bool
     * as it performs an internal `require` check
     * @param _token address of the ERC721 token
     * @param _recipient address to transfer the token to
     * @param _tokenId id of the individual token
     */
    function transferERC721(
        address _token,
        address _recipient,
        uint256 _tokenId
    ) external onlyOwner {
        _transferERC721(_token, _recipient, _tokenId);
    }

    /**
     * @notice transfer an ERC1155 token from this contract
     * @dev see `AssetRecoverer`
     * @param _token address of the ERC1155 token that is being recovered
     * @param _recipient address to transfer the token to
     * @param _tokenId id of the individual token to transfer
     * @param _amount amount of tokens to transfer
     * @param _data data to transfer along
     */
    function transferERC1155(
        address _token,
        address _recipient,
        uint256 _tokenId,
        uint256 _amount,
        bytes calldata _data
    ) external onlyOwner {
        _transferERC1155(_token, _recipient, _tokenId, _amount, _data);
    }
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>, Lido <[email protected]>
// SPDX-License-Identifier: MIT

// https://github.com/lidofinance/lido-otc-seller/blob/master/contracts/lib/AssetRecoverer.sol
pragma solidity 0.8.10;

import "./TokenRecoverer.sol";

/**
* @notice could not transfer ether
* @param _recipient address to transfer ether to
* @param _amount amount of ether to transfer
*/
error AssetRecoverer__TransferFailed(address _recipient, uint256 _amount);


/// @title Asset Recoverer
/// @notice Recover ether, ERC20, ERC721 and ERC1155 from a derived contract
abstract contract AssetRecoverer is TokenRecoverer {
    event EtherTransferred(address indexed _recipient, uint256 _amount);

    /**
     * @notice transfers ether from this contract
     * @dev using `address.call` is safer to transfer to other contracts
     * @param _recipient address to transfer ether to
     * @param _amount amount of ether to transfer
     */
    function _transferEther(address _recipient, uint256 _amount) internal virtual burnDisallowed(_recipient) {
        (bool success, ) = _recipient.call{value: _amount}("");
        if (!success) {
            revert AssetRecoverer__TransferFailed(_recipient, _amount);
        }
        emit EtherTransferred(_recipient, _amount);
    }
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>, Lido <[email protected]>
// SPDX-License-Identifier: MIT

// https://github.com/lidofinance/lido-otc-seller/blob/master/contracts/lib/AssetRecoverer.sol
pragma solidity 0.8.10;

import {IERC20} from "../@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC721} from "../@openzeppelin/contracts/token/ERC721/IERC721.sol";
import {IERC1155} from "../@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import {SafeERC20} from "../@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

/**
* @notice prevents burn for transfer functions
* @dev _recipient should not be a zero address
*/
error TokenRecoverer__NoBurn();


/// @title Token Recoverer
/// @notice Recover ERC20, ERC721 and ERC1155 from a derived contract
abstract contract TokenRecoverer {
    using SafeERC20 for IERC20;

    event ERC20Transferred(address indexed _token, address indexed _recipient, uint256 _amount);
    event ERC721Transferred(address indexed _token, address indexed _recipient, uint256 _tokenId);
    event ERC1155Transferred(address indexed _token, address indexed _recipient, uint256 _tokenId, uint256 _amount, bytes _data);

    /**
     * @notice prevents burn for transfer functions
     * @dev checks for zero address and reverts if true
     * @param _recipient address of the transfer recipient
     */
    modifier burnDisallowed(address _recipient) {
        if (_recipient == address(0)) {
            revert TokenRecoverer__NoBurn();
        }
        _;
    }

    /**
     * @notice transfer an ERC20 token from this contract
     * @dev `SafeERC20.safeTransfer` doesn't always return a bool
     * as it performs an internal `require` check
     * @param _token address of the ERC20 token
     * @param _recipient address to transfer the tokens to
     * @param _amount amount of tokens to transfer
     */
    function _transferERC20(
        address _token,
        address _recipient,
        uint256 _amount
    ) internal virtual burnDisallowed(_recipient) {
        IERC20(_token).safeTransfer(_recipient, _amount);
        emit ERC20Transferred(_token, _recipient, _amount);
    }

    /**
     * @notice transfer an ERC721 token from this contract
     * @dev `IERC721.safeTransferFrom` doesn't always return a bool
     * as it performs an internal `require` check
     * @param _token address of the ERC721 token
     * @param _recipient address to transfer the token to
     * @param _tokenId id of the individual token
     */
    function _transferERC721(
        address _token,
        address _recipient,
        uint256 _tokenId
    ) internal virtual burnDisallowed(_recipient) {
        IERC721(_token).transferFrom(address(this), _recipient, _tokenId);
        emit ERC721Transferred(_token, _recipient, _tokenId);
    }

    /**
     * @notice transfer an ERC1155 token from this contract
     * @dev `IERC1155.safeTransferFrom` doesn't always return a bool
     * as it performs an internal `require` check
     * @param _token address of the ERC1155 token that is being recovered
     * @param _recipient address to transfer the token to
     * @param _tokenId id of the individual token to transfer
     * @param _amount amount of tokens to transfer
     * @param _data data to transfer along
     */
    function _transferERC1155(
        address _token,
        address _recipient,
        uint256 _tokenId,
        uint256 _amount,
        bytes calldata _data
    ) internal virtual burnDisallowed(_recipient) {
        IERC1155(_token).safeTransferFrom(address(this), _recipient, _tokenId, _amount, _data);
        emit ERC1155Transferred(_token, _recipient, _tokenId, _amount, _data);
    }
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>
// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

import "../@openzeppelin/contracts/utils/Context.sol";
import "./IOwnable.sol";

/**
* @notice Throws if called by any account other than the owner.
* @param _caller address of the caller
* @param _owner address of the owner
*/
error OwnableBase__CallerNotOwner(address _caller, address _owner);

/**
 * @dev minimalistic version of OpenZeppelin's Ownable.
 * The owner is abstract and is not persisted in storage.
 * Needs to be overridden in a child contract.
 */
abstract contract OwnableBase is Context, IOwnable {

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        address caller = _msgSender();
        address currentOwner = owner();

        if (currentOwner != caller) {
            revert OwnableBase__CallerNotOwner(caller, currentOwner);
        }
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     * Needs to be overridden in a child contract.
     */
    function owner() public view virtual override returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity 0.8.10;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, 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 `from` to `to` 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 from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)

pragma solidity 0.8.10;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @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`.
     *
     * 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 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 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 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 the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol)

pragma solidity 0.8.10;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity 0.8.10;

import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @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 SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 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(
        IERC20 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'
        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(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @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(IERC20 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
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity 0.8.10;

/**
 * @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 IERC165 {
    /**
     * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity 0.8.10;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)

pragma solidity 0.8.10;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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");

        (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");

        (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");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal 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
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity 0.8.10;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>
// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

/**
 * @dev External interface of Ownable.
 */
interface IOwnable {
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() external view returns (address);
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>, OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

import "./Ownable.sol";

/**
* @notice caller must be pendingOwner
*/
error Ownable2Step__CallerNotNewOwner();

/**
* @notice new owner address should be different from the current owner
*/
error Ownable2Step__NewOwnerShouldNotBeCurrentOwner();

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private s_pendingOwner;

    /**
     * @dev Emits in transferOwnership (start of the transfer)
     * @param _previousOwner address of the previous owner
     * @param _newOwner address of the new owner
     */
    event OwnershipTransferStarted(address indexed _previousOwner, address indexed _newOwner);

    /**
     * @dev Returns the address of the pending owner.
     */
    function pendingOwner() public view virtual returns (address) {
        return s_pendingOwner;
    }

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        address currentOwner = owner();
        if (newOwner == currentOwner) {
            revert Ownable2Step__NewOwnerShouldNotBeCurrentOwner();
        }

        s_pendingOwner = newOwner;
        emit OwnershipTransferStarted(currentOwner, newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete s_pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() external {
        address sender = _msgSender();
        if (pendingOwner() != sender) {
            revert Ownable2Step__CallerNotNewOwner();
        }
        _transferOwnership(sender);
    }
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>
// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

import "./IOwnable.sol";

/**
 * @dev Ownable with an additional role of operator
 */
interface IOwnableWithOperator is IOwnable {
    /**
     * @dev Returns the current operator.
     */
    function operator() external view returns (address);
}

// SPDX-FileCopyrightText: 2023 P2P Validator <[email protected]>, OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
// SPDX-License-Identifier: MIT

pragma solidity 0.8.10;

import "./OwnableBase.sol";

/**
* @notice _newOwner cannot be a zero address
*/
error Ownable__NewOwnerIsZeroAddress();

/**
 * @dev OpenZeppelin's Ownable with modifier onlyOwner extracted to OwnableBase
 * and removed `renounceOwnership`
 */
abstract contract Ownable is OwnableBase {

    /**
     * @dev Emits when the owner has been changed.
     * @param _previousOwner address of the previous owner
     * @param _newOwner address of the new owner
     */
    event OwnershipTransferred(address indexed _previousOwner, address indexed _newOwner);

    address private s_owner;

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual override returns (address) {
        return s_owner;
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     * @param _newOwner address of the new owner
     */
    function transferOwnership(address _newOwner) external virtual onlyOwner {
        if (_newOwner == address(0)) {
            revert Ownable__NewOwnerIsZeroAddress();
        }
        _transferOwnership(_newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     * @param _newOwner address of the new owner
     */
    function _transferOwnership(address _newOwner) internal virtual {
        address oldOwner = s_owner;
        s_owner = _newOwner;
        emit OwnershipTransferred(oldOwner, _newOwner);
    }
}

{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_address","type":"address"},{"internalType":"address","name":"_operator","type":"address"},{"internalType":"address","name":"_owner","type":"address"}],"name":"Access__AddressNeitherOperatorNorOwner","type":"error"},{"inputs":[{"internalType":"address","name":"_caller","type":"address"},{"internalType":"address","name":"_operator","type":"address"},{"internalType":"address","name":"_owner","type":"address"}],"name":"Access__CallerNeitherOperatorNorOwner","type":"error"},{"inputs":[{"internalType":"address","name":"_operator","type":"address"}],"name":"Access__SameOperator","type":"error"},{"inputs":[],"name":"Access__ZeroNewOperator","type":"error"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"AssetRecoverer__TransferFailed","type":"error"},{"inputs":[],"name":"Oracle__InvalidProof","type":"error"},{"inputs":[],"name":"Ownable2Step__CallerNotNewOwner","type":"error"},{"inputs":[],"name":"Ownable2Step__NewOwnerShouldNotBeCurrentOwner","type":"error"},{"inputs":[{"internalType":"address","name":"_caller","type":"address"},{"internalType":"address","name":"_owner","type":"address"}],"name":"OwnableBase__CallerNotOwner","type":"error"},{"inputs":[],"name":"TokenRecoverer__NoBurn","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_token","type":"address"},{"indexed":true,"internalType":"address","name":"_recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"_tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"_data","type":"bytes"}],"name":"ERC1155Transferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_token","type":"address"},{"indexed":true,"internalType":"address","name":"_recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"ERC20Transferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_token","type":"address"},{"indexed":true,"internalType":"address","name":"_recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"ERC721Transferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"EtherTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_previousOperator","type":"address"},{"indexed":true,"internalType":"address","name":"_newOperator","type":"address"}],"name":"OperatorChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"_root","type":"bytes32"}],"name":"Oracle__Reported","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"_newOwner","type":"address"}],"name":"OwnershipTransferStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"_newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newOperator","type":"address"}],"name":"changeOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_address","type":"address"}],"name":"checkOperatorOrOwner","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[],"name":"dismissOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"operator","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_root","type":"bytes32"}],"name":"report","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"transferERC1155","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"transferERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"transferERC721","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"transferEther","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"_proof","type":"bytes32[]"},{"internalType":"address","name":"_feeDistributorInstance","type":"address"},{"internalType":"uint256","name":"_amountInGwei","type":"uint256"}],"name":"verify","outputs":[],"stateMutability":"view","type":"function"}]

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