Contract 0x69015912aa33720b842dcd6ac059ed623f28d9f7 1

// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;

import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "./ForwardRequestTypesV2.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

/**
 *
 * @title BiconomyForwarder
 *
 * @notice A trusted forwarder for Biconomy relayed meta transactions
 *
 * @dev - Inherits Forward Request structs from Forward Request Types
 * @dev - Verifies EIP712 signatures
 * @dev - Verifies traditional personalSign signatures
 * @dev - Implements 2D nonces... each Tx has a BatchId and a BatchNonce
 * @dev - Keeps track of highest BatchId used by a given address, to assist in encoding of transactions client-side
 * @dev - maintains a list of verified domain seperators
 *
 */

 contract BiconomyForwarderV2 is ForwardRequestTypesV2, Ownable {
    using ECDSA for bytes32;

    mapping(bytes32 => bool) public domains;

    uint256 chainId;

    string public constant EIP712_DOMAIN_TYPE = "EIP712Domain(string name,string version,address verifyingContract,bytes32 salt)";

    //@review
    bytes32 public constant REQUEST_TYPEHASH = keccak256(bytes("ForwardRequest(address from,address to,uint256 txGas,uint256 batchId,uint256 batchNonce,uint256 deadline,bytes data)"));

    //@review and rename
    bytes32 public constant FORWARD_REQUEST_TYPEHASH = keccak256(bytes("ERC20ForwardRequest(address from,address to,address token,uint256 txGas,uint256 tokenGasPrice,uint256 batchId,uint256 batchNonce,uint256 deadline,bytes data)"));

    //Sandbox use case
    bytes32 public constant CUSTOM_FORWARD_REQUEST_TYPEHASH = keccak256(bytes("CustomForwardRequest(string warning,string info,string action,ERC20ForwardRequest request)ERC20ForwardRequest(address from,address to,address token,uint256 txGas,uint256 tokenGasPrice,uint256 batchId,uint256 batchNonce,uint256 deadline,bytes data)"));

    mapping(address => mapping(uint256 => uint256)) nonces;

    constructor(
    ) public {
        uint256 id;
        assembly {
            id := chainid()
        }
        chainId = id;
    }

    /**
     * @dev registers domain seperators, maintaining that all domain seperators used for EIP712 forward requests use...
     * ... the address of this contract and the chainId of the chain this contract is deployed to
     * @param name : name of dApp/dApp fee proxy
     * @param version : version of dApp/dApp fee proxy
     */
    function registerDomainSeparator(string calldata name, string calldata version) external onlyOwner{
        uint256 id;
        /* solhint-disable-next-line no-inline-assembly */
        assembly {
            id := chainid()
        }

        bytes memory domainValue = abi.encode(
            keccak256(bytes(EIP712_DOMAIN_TYPE)),
            keccak256(bytes(name)),
            keccak256(bytes(version)),
            address(this),
            bytes32(id));

        bytes32 domainHash = keccak256(domainValue);

        domains[domainHash] = true;
        emit DomainRegistered(domainHash, domainValue);
    }

    event DomainRegistered(bytes32 indexed domainSeparator, bytes domainValue);

    event MetaTransactionExecuted(address indexed userAddress, address indexed relayerAddress, bytes indexed functionSignature);

    /**
     * @dev returns a value from the nonces 2d mapping
     * @param from : the user address
     * @param batchId : the key of the user's batch being queried
     * @return nonce : the number of transaction made within said batch
     */
    function getNonce(address from, uint256 batchId)
    public view
    returns (uint256) {
        return nonces[from][batchId];
    }

    //TODO
    //@review if new read method is needed for Custom
    /**
     * @dev an external function which exposes the internal _verifySigEIP712 method
     * @param req : request being verified
     * @param domainSeparator : the domain separator presented to the user when signing
     * @param sig : the signature generated by the user's wallet
     */
    function verifyEIP712(
        ERC20ForwardRequest calldata req,
        bytes32 domainSeparator,
        bytes calldata sig)
    external view {
        _verifySigEIP712(req, domainSeparator, sig);
    }

    /**
     * @dev verifies the call is valid by calling _verifySigEIP712
     * @dev executes the forwarded call if valid
     * @dev updates the nonce after
     * @param req : ERC20 forward request being executed
     * @param domainSeparator : the domain separator presented to the user when signing
     * @param sig : the signature generated by the user's wallet
     * @return success : false if call fails. true otherwise
     * @return ret : any return data from the call
     */
    function executeEIP712(
        ERC20ForwardRequest calldata req,
        bytes32 domainSeparator,
        bytes calldata sig
    )
    external 
    returns (bool success, bytes memory ret) {
        _verifySigEIP712(req,domainSeparator,sig);
        _updateNonce(req);
        /* solhint-disable-next-line avoid-low-level-calls */
         (success,ret) = req.to.call{gas : req.txGas}(abi.encodePacked(req.data, req.from));
         // Validate that the relayer has sent enough gas for the call.
        // See https://ronan.eth.link/blog/ethereum-gas-dangers/
        assert(gasleft() > req.txGas / 63);
        _verifyCallResult(success,ret,"Forwarded call to destination did not succeed");
        emit MetaTransactionExecuted(req.from, msg.sender, req.data);
    }

    /**
     * @dev verifies the call is valid by calling _verifySigEIP712Custom
     * @dev executes the forwarded call if valid
     * @dev updates the nonce after
     * @param req : Custom ERC20 forward request being executed
     * @param domainSeparator : the domain separator presented to the user when signing
     * @param sig : the signature generated by the user's wallet
     * @return success : false if call fails. true otherwise
     * @return ret : any return data from the call
     */
    function executeEIP712Custom(
        CustomForwardRequest calldata req,
        bytes32 domainSeparator,
        bytes calldata sig
    )
    external 
    returns (bool success, bytes memory ret) {
        _verifySigEIP712Custom(req,domainSeparator,sig);
        _updateNonceCustom(req);
        /* solhint-disable-next-line avoid-low-level-calls */
         (success,ret) = req.request.to.call{gas : req.request.txGas}(abi.encodePacked(req.request.data, req.request.from));
         // Validate that the relayer has sent enough gas for the call.
        // See https://ronan.eth.link/blog/ethereum-gas-dangers/
        assert(gasleft() > req.request.txGas / 63);
        _verifyCallResult(success,ret,"Forwarded call to destination did not succeed");
        emit MetaTransactionExecuted(req.request.from, msg.sender, req.request.data);
    }

    /**
     * @dev an external function which exposes the internal _verifySigPersonSign method
     * @param req : request being verified
     * @param sig : the signature generated by the user's wallet
     */
    function verifyPersonalSign(
        ERC20ForwardRequest calldata req,
        bytes calldata sig)
    external view {
        _verifySigPersonalSign(req, sig);
    }

    /**
     * @dev verifies the call is valid by calling _verifySigPersonalSign
     * @dev executes the forwarded call if valid
     * @dev updates the nonce after
     * @param req : ERC20 forward request being executed
     * @param sig : the signature generated by the user's wallet
     * @return success : false if call fails. true otherwise
     * @return ret : any return data from the call
     */
    function executePersonalSign(ERC20ForwardRequest calldata req,bytes calldata sig)
    external 
    returns(bool success, bytes memory ret){
        _verifySigPersonalSign(req, sig);
        _updateNonce(req);
        (success,ret) = req.to.call{gas : req.txGas}(abi.encodePacked(req.data, req.from));
        // Validate that the relayer has sent enough gas for the call.
        // See https://ronan.eth.link/blog/ethereum-gas-dangers/
        assert(gasleft() > req.txGas / 63);
        _verifyCallResult(success,ret,"Forwarded call to destination did not succeed");
        emit MetaTransactionExecuted(req.from, msg.sender, req.data);
    }

    /**
     * @dev Increments the nonce of given user/batch pair
     * @dev Updates the highestBatchId of the given user if the request's batchId > current highest
     * @dev only intended to be called post call execution
     * @param req : ERC20 forward request that was executed
     */
    function _updateNonce(ERC20ForwardRequest calldata req) internal {
        nonces[req.from][req.batchId]++;
    }
    
    /**
     * @dev Increments the nonce of given user/batch pair
     * @dev Updates the highestBatchId of the given user if the request's batchId > current highest
     * @dev only intended to be called post call execution
     * @param req : ERC20 custom forward request that was executed
     */
    function _updateNonceCustom(CustomForwardRequest calldata req) internal {
        nonces[req.request.from][req.request.batchId]++;
    }

    /**
     * @dev verifies the domain separator used has been registered via registerDomainSeparator()
     * @dev recreates the 32 byte hash signed by the user's wallet (as per EIP712 specifications)
     * @dev verifies the signature using Open Zeppelin's ECDSA library
     * @dev signature valid if call doesn't throw
     *
     * @param req : ERC20 forward request being executed
     * @param domainSeparator : the domain separator presented to the user when signing
     * @param sig : the signature generated by the user's wallet
     *
     */
    function _verifySigEIP712(
        ERC20ForwardRequest calldata req,
        bytes32 domainSeparator,
        bytes memory sig)
    internal
    view
    {   
        uint256 id;
        /* solhint-disable-next-line no-inline-assembly */
        assembly {
            id := chainid()
        }
        require(req.deadline == 0 || block.timestamp + 20 <= req.deadline, "request expired");
        require(domains[domainSeparator], "unregistered domain separator");
        require(chainId == id, "potential replay attack on the fork");
        bytes32 digest =
            keccak256(abi.encodePacked(
                "\x19\x01",
                domainSeparator,
                hashERC20ForwardRequest(req)
            ));
        require(digest.recover(sig) == req.from, "signature mismatch");
    }

    /**
     * @dev verifies the domain separator used has been registered via registerDomainSeparator()
     * @dev recreates the 32 byte hash signed by the user's wallet (as per EIP712 specifications)
     * @dev verifies the signature using Open Zeppelin's ECDSA library
     * @dev signature valid if call doesn't throw
     *
     * @param req : Custom ERC20 forward request being executed
     * @param domainSeparator : the domain separator presented to the user when signing
     * @param sig : the signature generated by the user's wallet
     *
     */
    function _verifySigEIP712Custom(
        CustomForwardRequest calldata req,
        bytes32 domainSeparator,
        bytes memory sig)
    internal
    view
    {   
        uint256 id;
        /* solhint-disable-next-line no-inline-assembly */
        assembly {
            id := chainid()
        }
        require(req.request.deadline == 0 || block.timestamp + 20 <= req.request.deadline, "request expired");
        require(domains[domainSeparator], "unregistered domain separator");
        require(chainId == id, "potential replay attack on the fork");
        bytes32 digest =
            keccak256(abi.encodePacked(
                "\x19\x01",
                domainSeparator,
                hashCustomForwardRequest(req)
            ));
        require(digest.recover(sig) == req.request.from, "signature mismatch");
    }


    function hashERC20ForwardRequest(ERC20ForwardRequest calldata request) internal view returns (bytes32) {
        return keccak256(abi.encode(
            FORWARD_REQUEST_TYPEHASH,
            request.from,
            request.to,
            request.token,
            request.txGas,
            request.tokenGasPrice,
            request.batchId,
            nonces[request.from][request.batchId],
            request.deadline,
            keccak256(request.data)
        ));
    }

    function hashCustomForwardRequest(CustomForwardRequest calldata req) internal view returns (bytes32) {
        return keccak256(abi.encode(
            CUSTOM_FORWARD_REQUEST_TYPEHASH,
            keccak256(bytes(req.warning)),
            keccak256(bytes(req.info)),
            keccak256(bytes(req.action)),
            hashERC20ForwardRequest(req.request) 
        ));
    }

    /**
     * @dev encodes a 32 byte data string (presumably a hash of encoded data) as per eth_sign
     *
     * @param hash : hash of encoded data that signed by user's wallet using eth_sign
     * @return input hash encoded to matched what is signed by the user's key when using eth_sign*/
    function prefixed(bytes32 hash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev recreates the 32 byte hash signed by the user's wallet
     * @dev verifies the signature using Open Zeppelin's ECDSA library
     * @dev signature valid if call doesn't throw
     *
     * @param req : ERC20 forward request being executed
     * @param sig : the signature generated by the user's wallet
     *
     */
    function _verifySigPersonalSign(
        ERC20ForwardRequest calldata req,
        bytes memory sig)
    internal
    view
    {
        require(req.deadline == 0 || block.timestamp + 20 <= req.deadline, "request expired");
        bytes32 digest = prefixed(keccak256(abi.encodePacked(
            req.from,
            req.to,
            req.token,
            req.txGas,
            req.tokenGasPrice,
            req.batchId,
            nonces[req.from][req.batchId],
            req.deadline,
            keccak256(req.data)
        )));
        require(digest.recover(sig) == req.from, "signature mismatch");
    }

    /**
     * @dev verifies the call result and bubbles up revert reason for failed calls
     *
     * @param success : outcome of forwarded call
     * @param returndata : returned data from the frowarded call
     * @param errorMessage : fallback error message to show 
     */
     function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure {
        if (!success) {
            // 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);
            }
        }
    }

}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s;
        uint8 v;
        assembly {
            s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
            v := add(shr(255, vs), 27)
        }
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;


/* deadline can be removed : GSN reference https://github.com/opengsn/gsn/blob/master/contracts/forwarder/IForwarder.sol (Saves 250 more gas)*/
/**
* @title ForwardRequestTypes 
* @notice specifies structures required by Forwarders to verify structured signatures.
* @notice This contract defines a struct which both ERC20Forwarder and BiconomyForwarder inherit. ERC20ForwardRequest includes all the fields present in the GSN V2 ForwardRequest struct, 
* but adds the following :
* address token : address of the token to pay for gas fees. For gasless transactions token address will be 0 address
* uint256 tokenGasPrice : gas price in the context of fee token
* uint256 txGas : gas to be supplied for recipient method call
* uint256 batchNonce : used for 2D nonces
* uint256 deadline 
* @dev Fields are placed in type order, to minimise storage used when executing transactions.
*/
contract ForwardRequestTypesV2 {

/*allow the EVM to optimize for this, 
ensure that you try to order your storage variables and struct members such that they can be packed tightly*/

    struct ForwardRequest {
        address from; 
        address to; 
        uint256 txGas;
        uint256 batchId; 
        uint256 batchNonce; 
        uint256 deadline; 
        bytes data;
    }

    struct ERC20ForwardRequest {
        address from; 
        address to; 
        address token; 
        uint256 txGas;
        uint256 tokenGasPrice;
        uint256 batchId; 
        uint256 batchNonce; 
        uint256 deadline; 
        bytes data;
    }

    //@review
    //should be SandBox Forward Request?
    struct CustomForwardRequest {
        string warning; //optional
        string info;
        string action;
        ERC20ForwardRequest request;
    }

     //For DAI and EIP2612 type Permits
     struct PermitRequest {
        address holder; 
        address spender;  
        uint256 value;
        uint256 nonce;
        uint256 expiry;
        bool allowed; 
        uint8 v;
        bytes32 r; 
        bytes32 s; 
    }

}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic 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}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @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;
    }
}

{
  "evmVersion": "berlin",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"domainSeparator","type":"bytes32"},{"indexed":false,"internalType":"bytes","name":"domainValue","type":"bytes"}],"name":"DomainRegistered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"userAddress","type":"address"},{"indexed":true,"internalType":"address","name":"relayerAddress","type":"address"},{"indexed":true,"internalType":"bytes","name":"functionSignature","type":"bytes"}],"name":"MetaTransactionExecuted","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":"CUSTOM_FORWARD_REQUEST_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"EIP712_DOMAIN_TYPE","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"FORWARD_REQUEST_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"REQUEST_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"domains","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"txGas","type":"uint256"},{"internalType":"uint256","name":"tokenGasPrice","type":"uint256"},{"internalType":"uint256","name":"batchId","type":"uint256"},{"internalType":"uint256","name":"batchNonce","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct ForwardRequestTypesV2.ERC20ForwardRequest","name":"req","type":"tuple"},{"internalType":"bytes32","name":"domainSeparator","type":"bytes32"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"executeEIP712","outputs":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"ret","type":"bytes"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"string","name":"warning","type":"string"},{"internalType":"string","name":"info","type":"string"},{"internalType":"string","name":"action","type":"string"},{"components":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"txGas","type":"uint256"},{"internalType":"uint256","name":"tokenGasPrice","type":"uint256"},{"internalType":"uint256","name":"batchId","type":"uint256"},{"internalType":"uint256","name":"batchNonce","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct ForwardRequestTypesV2.ERC20ForwardRequest","name":"request","type":"tuple"}],"internalType":"struct ForwardRequestTypesV2.CustomForwardRequest","name":"req","type":"tuple"},{"internalType":"bytes32","name":"domainSeparator","type":"bytes32"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"executeEIP712Custom","outputs":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"ret","type":"bytes"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"txGas","type":"uint256"},{"internalType":"uint256","name":"tokenGasPrice","type":"uint256"},{"internalType":"uint256","name":"batchId","type":"uint256"},{"internalType":"uint256","name":"batchNonce","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct ForwardRequestTypesV2.ERC20ForwardRequest","name":"req","type":"tuple"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"executePersonalSign","outputs":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"ret","type":"bytes"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"batchId","type":"uint256"}],"name":"getNonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"version","type":"string"}],"name":"registerDomainSeparator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"txGas","type":"uint256"},{"internalType":"uint256","name":"tokenGasPrice","type":"uint256"},{"internalType":"uint256","name":"batchId","type":"uint256"},{"internalType":"uint256","name":"batchNonce","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct ForwardRequestTypesV2.ERC20ForwardRequest","name":"req","type":"tuple"},{"internalType":"bytes32","name":"domainSeparator","type":"bytes32"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"verifyEIP712","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"txGas","type":"uint256"},{"internalType":"uint256","name":"tokenGasPrice","type":"uint256"},{"internalType":"uint256","name":"batchId","type":"uint256"},{"internalType":"uint256","name":"batchNonce","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"internalType":"struct ForwardRequestTypesV2.ERC20ForwardRequest","name":"req","type":"tuple"},{"internalType":"bytes","name":"sig","type":"bytes"}],"name":"verifyPersonalSign","outputs":[],"stateMutability":"view","type":"function"}]

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