// 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/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/fees/BridgeAdminOracle.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.17;

import '@openzeppelin/contracts/access/Ownable.sol';
import '../interfaces/IBridgeAdminOracle.sol';

contract BridgeAdminOracle is Ownable, IBridgeAdminOracle {
    uint256 public fee;
    address payable private feeReceiver;
    address public token;
    mapping(uint64 => bool) public allowedChains;

    event FeeChanged(uint256 newFee);
    event ChainAdded(uint64 chainId);
    event FeeReceiverChanged(address newFeeReceiver);

    constructor (uint256 _fee, uint64[] memory _allowedChains, address payable _feeReceiver, address _token) {
        fee = _fee;
        feeReceiver = _feeReceiver;
        token = _token;
        for (uint i = 0; i < _allowedChains.length; i++) {
            allowedChains[_allowedChains[i]] = true;
        }
    }

    //NEED THIS FOR THE INTERFACE TO USE IN FEECOLLECTOR
    function getFee() external view returns (uint256) {
        return fee;
    }

    function setFee(uint256 _fee) external onlyOwner {
        fee = _fee;
        emit FeeChanged(_fee);
    }

    function getFeeReceiver() external view returns (address) {
        return feeReceiver;
    }

    function setFeeReceiver(address payable _feeReceiver) external onlyOwner {
        feeReceiver = _feeReceiver;
        emit FeeReceiverChanged(_feeReceiver);
    }

    function addChain(uint64 _chainId) external onlyOwner {
        allowedChains[_chainId] = true;
        emit ChainAdded(_chainId);
    }

    function checkChain(uint64 chainId) public view returns(bool) {
        return allowedChains[chainId];
    }

    function checkToken(address _token) public view returns(bool){
        return token == _token;
    }
}


// File: contracts/interfaces/IBridgeAdminOracle.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.8.17;

interface IBridgeAdminOracle {
    function getFee() external view returns (uint256);
    function checkChain(uint64 chainId) external view returns(bool);
    function getFeeReceiver() external view returns (address);
    function checkToken(address _token) external view returns(bool);
}