// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

// File: @openzeppelin/contracts/security/ReentrancyGuard.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

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

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



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

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;
    }
}

// File: contracts/ClaimETH.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.19;
import '@openzeppelin/contracts/security/ReentrancyGuard.sol';
import './utils/NativeOwnerApproval.sol';

// WagerBet Custodial
contract ClaimETH is NativeOwnerApproval, ReentrancyGuard {
    /* ========== EVENTS ========== */
    event Withdraw(uint256 amount);
    event ETHClaimed(uint256 indexed nonce, address indexed user, uint256 amount);
    event EtherDeposited(address indexed from, uint256 amount);

    constructor() {
        _initializeEIP712('ClaimETH', '1');
    }

    receive() external payable {
        emit EtherDeposited(msg.sender, msg.value);
    }

    function claimETHByUser(uint256 amount, uint256 deadline, bytes32 sigR, bytes32 sigS, uint8 sigV) external nonReentrant {
        require(block.timestamp <= deadline, 'Withdrawal Time Limit Elapsed');
        checkOwnerApproval(abi.encode(msg.sender, amount, deadline), sigR, sigS, sigV);
        _withdrawEther(msg.sender, amount);
        emit ETHClaimed(nonces[msg.sender] - 1, msg.sender, amount);
    }

    function withdrawEther(uint256 amount) external onlyOwner nonReentrant {
        _withdrawEther(msg.sender, amount);
        emit Withdraw(amount);
    }

    function _withdrawEther(address user, uint256 amount) internal {
        (bool sent, bytes memory data) = payable(user).call{value: amount}('');
        string memory response = string(data);
        require(sent, response);
    }
}

// File: contracts/utils/EIP712Base.sol



//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.19;

contract Initializable {
    bool inited = false;

    modifier initializer() {
        require(!inited, "already inited");
        _;
        inited = true;
    }
}
/**
 * https://github.com/maticnetwork/pos-portal/blob/master/contracts/common/EIP712Base.sol
 */

contract EIP712Base is Initializable {
    struct EIP712Domain {
        string name;
        string version;
        address verifyingContract;
        bytes32 salt;
    }

    bytes32 internal constant EIP712_DOMAIN_TYPEHASH =
        keccak256(bytes("EIP712Domain(string name,string version,address verifyingContract,bytes32 salt)"));
    bytes32 internal domainSeperator;

    // supposed to be called once while initializing.
    // one of the contracts that inherits this contract follows proxy pattern
    // so it is not possible to do this in a constructor
    function _initializeEIP712(string memory name, string memory version) internal initializer {
        _setDomainSeperator(name, version);
    }

    function _setDomainSeperator(string memory name, string memory version) internal {
        domainSeperator = keccak256(
            abi.encode(
                EIP712_DOMAIN_TYPEHASH,
                keccak256(bytes(name)),
                keccak256(bytes(version)),
                address(this),
                bytes32(block.chainid)
            )
        );
    }

    function getDomainSeperator() public view returns (bytes32) {
        return domainSeperator;
    }

    /**
     * Accept message hash and returns hash message in EIP712 compatible form
     * So that it can be used to recover signer from signature signed using EIP712 formatted data
     * https://eips.ethereum.org/EIPS/eip-712
     * "\\x19" makes the encoding deterministic
     * "\\x01" is the version byte to make it compatible to EIP-191
     */
    function toTypedMessageHash(bytes32 messageHash) internal view returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash));
    }
}
// File: contracts/utils/NativeOwnerApproval.sol



//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.2;

import "./EIP712Base.sol";
import "@openzeppelin/contracts/access/Ownable.sol";


contract NativeOwnerApproval is EIP712Base, Ownable {
    bytes32 private constant OWNER_APPROVAL_TYPEHASH =
        keccak256(bytes("OwnerApproval(uint256 nonce,address from,bytes userData)"));
    mapping(address => uint256) nonces;

    /*
     * Owner Approval structure.
     */
    struct OwnerApproval {
        uint256 nonce;
        address from;
        bytes userData;
    }

    function getNonce(address user) public view returns (uint256 nonce) {
        nonce = nonces[user];
    }

    function checkOwnerApproval(
        bytes memory userData,
        bytes32 sigR,
        bytes32 sigS,
        uint8 sigV
    ) internal {
        OwnerApproval memory ownerApprovalTx = OwnerApproval({
            nonce: nonces[msg.sender],
            from: msg.sender,
            userData: userData
        });
        require(verify(owner(), ownerApprovalTx, sigR, sigS, sigV), "Signer and signature do not match");

        // increase nonce for user (to avoid re-use)
        nonces[msg.sender] = nonces[msg.sender] + 1;
    }

    function hashOwnerApproval(OwnerApproval memory ownerApprovalTx) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encode(OWNER_APPROVAL_TYPEHASH, ownerApprovalTx.nonce, ownerApprovalTx.from, keccak256(ownerApprovalTx.userData))
            );
    }

    function verify(
        address signer,
        OwnerApproval memory ownerApprovalTx,
        bytes32 sigR,
        bytes32 sigS,
        uint8 sigV
    ) internal view returns (bool) {
        require(signer != address(0), "NativeOwnerApproval: INVALID_SIGNER");
        return signer == ecrecover(toTypedMessageHash(hashOwnerApproval(ownerApprovalTx)), sigV, sigR, sigS);
    }
}