// File: contracts/stake.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.0/contracts/proxy/utils/UUPSUpgradeable.sol";
// import "https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/blob/v4.9.0/contracts/access/OwnableUpgradeable.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.0/contracts/access/Ownable.sol";
contract Stake is Ownable{
    // address public owner;
    address public authorizedAdder;
    address public publicKey;
    uint256 public  deploymentChainId;
    bool public paused ;
    bool public lock;
    uint256 public minBlockDelayInSeconds;

    struct WithdrawRequest {
        bytes32 ethsId;
        address ethsOwner;
        uint256 amt;
        bytes32 ethsClassHash;
        uint256 blockNumber;
        uint256 nonce;
        bytes signature;
    }
    
    mapping(address => uint256) private userNonces;

    event EthsWithdrawn(bytes32 indexed ethsId, address indexed ethsOwner,uint256 indexed amt);


   
    modifier onlyCorrectChain() {
        require(block.chainid == deploymentChainId, "This transaction is not on the correct chain.");
        _;
    }

    modifier whenNotPaused() {
        require(!paused, "Contract is paused");
        _;
    }

    modifier whenPaused() {
        require(paused, "Contract is not paused");
        _;
    }


    // function initialize(address _publicKey) public initializer {
    //     __Ownable_init();
    //     lock = true;
    //     paused = false;
    //     publicKey = _publicKey;
    //     deploymentChainId = block.chainid;
        
    // }
    constructor(address _publicKey){
        lock = false;
        paused = false;
        publicKey = _publicKey;
        deploymentChainId = block.chainid;

    }

   
    

    function pause() public onlyOwner whenNotPaused {
        paused = true;
    }

    function unpause() public onlyOwner whenPaused {
        paused = false;
    }

    function setLock(bool _lock) public onlyOwner {
        lock = _lock;
    }



    function updatePublicKey(address _newPublicKey) public onlyOwner {
        publicKey = _newPublicKey;
    }


    function withdrawEths(bytes32  ethsId,address  ethsOwner, uint256  amt,bytes32  ethsClassHash,uint256 blockNumber,uint256 nonce, bytes memory signature) public {
        require(!lock, "Is lock");
        require(verifySignature(ethsId, ethsOwner, amt,ethsClassHash,blockNumber,nonce, signature), "Invalid signature");
        require(block.number >= blockNumber, "Minimum block delay not met");
        require(ethsOwner == msg.sender, "Only the asset owner can withdraw");
        require(nonce == userNonces[msg.sender], "Invalid nonce");
        userNonces[msg.sender]++;

        emit EthsWithdrawn(ethsId, ethsOwner,amt);
    }

   function batchWithdrawEths(WithdrawRequest[] memory requests) public {
        for (uint i = 0; i < requests.length; i++) {
            WithdrawRequest memory request = requests[i];
            require(!lock, "Is lock");
            require(verifySignature(request.ethsId, request.ethsOwner, request.amt, request.ethsClassHash, request.blockNumber, request.nonce, request.signature), "Invalid signature");
            require(block.number >= request.blockNumber, "Minimum block delay not met");
            require(request.ethsOwner == msg.sender, "Only the asset owner can withdraw");
            require(request.nonce == userNonces[msg.sender], "Invalid nonce");
            userNonces[msg.sender]++;
            emit EthsWithdrawn(request.ethsId, request.ethsOwner, request.amt);
           
        }
    }

    function verifySignature(bytes32 ethsId, address user, uint256 amt,bytes32 ethsClassHash,uint256 blockNumber,uint256 nonce,  bytes memory signature) public view returns(bool) {
        bytes32 messageHash = getMessageHash(ethsId, user, amt,ethsClassHash,blockNumber,nonce);
        bytes32 ethSignedMessageHash = getEthSignedMessageHash(messageHash);

        return recoverSigner(ethSignedMessageHash, signature) == publicKey;
    }

    function getEthSignedMessageHash(bytes32 _messageHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", _messageHash));
    }

     function getMessageHash(bytes32 ethsId, address user, uint256 amt, bytes32 ethsClassHash,  uint256 blockNumber,uint256 nonce) public pure returns (bytes32) {
        return keccak256(abi.encodePacked(ethsId, user, amt,ethsClassHash,blockNumber,nonce));
    }

    function recoverSigner(bytes32 _ethSignedMessageHash, bytes memory _signature) internal pure returns (address) {
        (bytes32 r, bytes32 s, uint8 v) = splitSignature(_signature);
        return ecrecover(_ethSignedMessageHash, v, r, s);
    }

    function splitSignature(bytes memory sig) internal pure returns (bytes32 r, bytes32 s, uint8 v) {
        require(sig.length == 65, "invalid signature length");

        assembly {
            // first 32 bytes, after the length prefix
            r := mload(add(sig, 32))
            // second 32 bytes
            s := mload(add(sig, 64))
            // final byte (first byte of the next 32 bytes)
            v := byte(0, mload(add(sig, 96)))
        }

       
        if (v < 27) {
            v += 27;
        }

        require(v == 27 || v == 28, "invalid v value");
    }

  
    function getNonce(address user) public view returns (uint256) {
        return userNonces[user];
    }

    function withdraw(uint256 amount) public onlyOwner {
        require(address(this).balance >= amount, "Insufficient balance in contract");
        payable(msg.sender).transfer(amount);
    }

    
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.0/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: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.0/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;
    }
}