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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 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 {
        _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: node_modules/@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: src/FxRootPriceSender.sol



// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.2;

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

///@title Rate Provider Sender


interface IFxStateSender {
    function sendMessageToChild(address _receiver, bytes calldata _data) external;
}


contract FxPriceReader is Ownable{
    address private tokenAddress;
    address private fxRoot = 0xfe5e5D361b2ad62c541bAb87C45a0B9B018389a2; //mainnet 

    uint256 price;
    address target;
    bytes4 fnSelector;

    event ValueSent(address target, uint256 price);
    event NewTargetSet(address _oldTarget, address _newTarget);
   

    constructor(address _tokenAddress, bytes4 _fnSelector) {
        tokenAddress = _tokenAddress;
        price = 0;
        fnSelector = _fnSelector;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                        PUBLIC Methods                      */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
    
    ///@notice Sending value to be synced on PoS or zkEVM
    function sendValue() public {
        bytes memory data = abi.encodeWithSelector(fnSelector);
        (bool success, bytes memory res) = address(tokenAddress).call(data);
        if(success) {
            price = abi.decode(res, (uint256));
            IFxStateSender(fxRoot).sendMessageToChild(target, res);
            emit ValueSent(target, price);
        }
    }

    function currentValue() public returns (uint256) {
        bytes memory data = abi.encodeWithSelector(fnSelector);
        (bool success, bytes memory res) = address(tokenAddress).call(data);
        if(success) {
            price = abi.decode(res, (uint256));   
        }
        return price;
    }

    function currentTarget() public view returns(address){
        return target;
    }



    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                        PRIVATE Methods                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    ///@notice Update receiver target
    ///@param _target is the new target receiver address
    function setNewTarget(address _target) public onlyOwner{
        emit NewTargetSet(target, _target);
        target =_target;
    }
}