Address io1mscd5k42tayvwy2kx5ert2jdwvpx8hf3v2w5nm

pragma solidity 0.6.4;
pragma experimental ABIEncoderV2;


// SPDX-License-Identifier: MIT
library EthAddressLib {
    /**
     * @dev returns the address used within the protocol to identify ETH
     * @return the address assigned to ETH
     */
    function ethAddress() internal pure returns (address) {
        return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
    }
}

// SPDX-License-Identifier: MIT
interface IPriceOracles {
    function get(address token) external view returns (uint256, bool);
}

// SPDX-License-Identifier: MIT
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount)
        external
        returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    function decimals() external view returns (uint8);
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
}

// SPDX-License-Identifier: MIT
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }

    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a <= b ? a : b;
    }

    function abs(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a < b) {
            return b - a;
        }
        return a - b;
    }
}

// SPDX-License-Identifier: MIT
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies in extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(
            address(this).balance >= amount,
            "Address: insufficient balance"
        );

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{value: amount}("");
        require(
            success,
            "Address: unable to send value, recipient may have reverted"
        );
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(
                target,
                data,
                value,
                "Address: low-level call with value failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(
            address(this).balance >= value,
            "Address: insufficient balance for call"
        );
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(
        address target,
        bytes memory data,
        uint256 weiValue,
        string memory errorMessage
    ) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{value: weiValue}(
            data
        );
        if (success) {
            return returndata;
        } else {
            // 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
/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transfer.selector, to, value)
        );
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
        );
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.approve.selector, spender, value)
        );
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(
            value
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(
            value,
            "SafeERC20: decreased allowance below zero"
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(
            data,
            "SafeERC20: low-level call failed"
        );
        if (returndata.length > 0) {
            // Return data is optional
            // solhint-disable-next-line max-line-length
            require(
                abi.decode(returndata, (bool)),
                "SafeERC20: ERC20 operation did not succeed"
            );
        }
    }
}

/**
 * @title Initializable
 *
 * @dev Helper contract to support initializer functions. To use it, replace
 * the constructor with a function that has the `initializer` modifier.
 * WARNING: Unlike constructors, initializer functions must be manually
 * invoked. This applies both to deploying an Initializable contract, as well
 * as extending an Initializable contract via inheritance.
 * WARNING: When used with inheritance, manual care must be taken to not invoke
 * a parent initializer twice, or ensure that all initializers are idempotent,
 * because this is not dealt with automatically as with constructors.
 */
contract Initializable {

  /**
   * @dev Indicates that the contract has been initialized.
   */
  bool private initialized;

  /**
   * @dev Indicates that the contract is in the process of being initialized.
   */
  bool private initializing;

  /**
   * @dev Modifier to use in the initializer function of a contract.
   */
  modifier initializer() {
    require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");

    bool isTopLevelCall = !initializing;
    if (isTopLevelCall) {
      initializing = true;
      initialized = true;
    }

    _;

    if (isTopLevelCall) {
      initializing = false;
    }
  }

  /// @dev Returns true if and only if the function is running in the constructor
  function isConstructor() private view returns (bool) {
    // extcodesize checks the size of the code stored in an address, and
    // address returns the current address. Since the code is still not
    // deployed when running a constructor, any checks on its code size will
    // yield zero, making it an effective way to detect if a contract is
    // under construction or not.
    address self = address(this);
    uint256 cs;
    assembly { cs := extcodesize(self) }
    return cs == 0;
  }

  // Reserved storage space to allow for layout changes in the future.
  uint256[50] private ______gap;
}

// SPDX-License-Identifier: MIT
// chainlink 价格合约接口
interface AggregatorInterface {
    function latestAnswer() external view returns (int256);
    function latestRoundData()
        external
        view
        returns (
            uint80 roundId,
            int256 answer, //
            uint256 startedAt,
            uint256 updatedAt, //
            uint80 answeredInRound
        );
}

contract ChainlinkWrapper is Initializable, IPriceOracles {
    using SafeERC20 for IERC20;
    using SafeMath for uint256;

    address public multiSig;
    address public admin;
    
    // ETH网络：存储 ETH/USD 交易对合约地址, 其他xxx_ETH合约通过ETH/USD进行中转计算
    address public ethToUsdPriceOracle;
    // 维护需要从chainlink取价格的token 地址 => chainlink 价格合约地址的映射
    mapping(address => address) public tokenChainlinkMap;

    struct Price {
        uint price;
        uint expiration;
    }

    mapping (address => Price) public prices;

    mapping (address => bool) public directTokenMap;//直接调用 token=> true, other false
    
    //BNB网络：存储BNB/USD 交易对合约地址, 其他xxx_BNB合约通过BNB/USD进行中转计算
    address public bnbToUsdPriceOracle;
    //MATIC网络：存储MATIC/USD 交易对合约地址, 其他xxx_MATIC合约通过MATIC/USD进行中转计算
    //nativeToUsdPriceOrace作为evm兼容链的原生token语言机，例如matic，
    address public nativeToUsdPriceOracle;

    event SetTokenChainlinkMap(address token, address chainlink);
    event SetTokenChainlinkMaps(address[] tokens, address[] chainlinks);

    event SetDirectTokenMap(address token, bool direct);
    event SetDirectTokenMaps(address[] tokens, bool direct);


    function initialize(address _multiSig)
        public
        initializer
    {
        multiSig = _multiSig;
        admin = msg.sender;
    }

    // constructor(address _multiSig) public
    // {
    //     multiSig = _multiSig;
    //     admin = msg.sender;
    // }

    receive() external payable {}

    modifier onlyAdmin {
        require(msg.sender == admin, "require admin");
        _;
    }

    modifier onlyMultiSig {
        require(msg.sender == multiSig, "require multiSig");
        _;
    }

    function setMultiSig(address _multiSig) external onlyMultiSig {
        multiSig = _multiSig;
    }

    function setAdmin(address _admin) external onlyMultiSig {
        admin = _admin;
    }

    function isEthOrBnB(address token) public view returns (bool) {
        if (token == address(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
             || token == address(0)
             || token == address(0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB)) {
            return true;
        }
        return false;
    }

    function get(address token) external override view returns (uint256, bool) {
        if (tokenChainlinkMap[token] != address(0)) {
            return getChainLinkPrice(token);
        }
        
        return (0, false);
    }

    function setEthToUsdPriceOracle(address _ethToUsdPriceOracle) external onlyAdmin {
        ethToUsdPriceOracle = _ethToUsdPriceOracle;
    }

    function setBnbToUsdPriceOracle(address _bnbToUsdPriceOracle) external onlyAdmin {
        bnbToUsdPriceOracle = _bnbToUsdPriceOracle;
    }

    function setNativeToUsdPriceOracle(address _nativeToUsdPriceOracle) external onlyAdmin {
        nativeToUsdPriceOracle = _nativeToUsdPriceOracle;
    }

    function setTokenChainlinkMap(address token, address chainlink)
        public
        onlyAdmin
    {
        tokenChainlinkMap[token] = chainlink;
        emit SetTokenChainlinkMap(token, chainlink);
    }

    function setTokenChainlinkMaps(address[] calldata tokens, address[] calldata chainlinks)
        external
        onlyAdmin
    {
        require(tokens.length == chainlinks.length, "inconsistent length");
        for (uint i = 0; i < tokens.length; i++) {
            setTokenChainlinkMap(tokens[i], chainlinks[i]);
        }
        emit SetTokenChainlinkMaps(tokens, chainlinks);
    }

    function setDirectTokenMap(address token, bool direct) external onlyAdmin {
        directTokenMap[token] = direct;

        emit SetDirectTokenMap(token, direct);
    }

    function setDirectTokenMaps(address[] calldata tokens, bool direct) external onlyAdmin {
        for (uint i = 0; i < tokens.length; i++) {
            directTokenMap[tokens[i]] = direct;
        }

        emit SetDirectTokenMaps(tokens, direct);
    }

    function getChainLinkPrice(address token)
        public
        view
        returns (uint256, bool)
    {
        // // 未设置中转，返回无效价格
        // if (ethToUsdPriceOracle == address(0) && bnbToUsdPriceOracle == address(0)) {
        //     return (0, false);
        // }

        // // 同时设置，返回失败
        // if (ethToUsdPriceOracle != address(0) && bnbToUsdPriceOracle != address(0)) {
        //     return (0, false);
        // }

        // address referenceOracle = address(0);
        // if (ethToUsdPriceOracle != address(0) && bnbToUsdPriceOracle == address(0)) {
        //     referenceOracle = ethToUsdPriceOracle;
        // }

        // if (ethToUsdPriceOracle == address(0) && bnbToUsdPriceOracle != address(0)) {
        //     referenceOracle = bnbToUsdPriceOracle;
        // }

        if (nativeToUsdPriceOracle == address(0)) {
            return (0, false);
        }
        address referenceOracle = nativeToUsdPriceOracle;

        // 构造 chainlink 合约实例
        AggregatorInterface chainlinkContract = AggregatorInterface(
            referenceOracle
        );
        // 获取 ETH/USD 交易对的价格，单位是 1e8
        int256 basePrice = chainlinkContract.latestAnswer();
        // 若要获取 ETH 的价格，则返回 1e8 * 1e10 = 1e18
        // ETH上的ETH，BSC的BNB，直接调用chainlink，或者设置的直接调用的token，直接调用chainlink
        if (isEthOrBnB(token)) {
            return (uint256(basePrice).mul(1e10), true);
        }

        if (directTokenMap[token]) {
            // 构造 chainlink 合约实例
            chainlinkContract = AggregatorInterface(tokenChainlinkMap[token]);
            // 获取 XXX/USD 交易对的价格，单位是 1e8
            basePrice = chainlinkContract.latestAnswer();
            return (uint256(basePrice).mul(1e10), true);
        }

        // // 获取 token/ETH 交易对的价格（目前是 USDT 和 USDC ），单位是 1e18
        // FIXME: matic网络无xxx_matic交易对
        chainlinkContract = AggregatorInterface(tokenChainlinkMap[token]);
        int256 tokenPrice = chainlinkContract.latestAnswer();
        return (uint256(basePrice).mul(uint256(tokenPrice)).div(1e8), true);
    }

    function getLatestRoundData(address token)
        public
        view
        returns (uint256, uint256)
    {
        // // 未设置中转，返回无效价格
        // if (ethToUsdPriceOracle == address(0) && bnbToUsdPriceOracle == address(0)) {
        //     return (0, 0);
        // }

        // // 同时设置，返回失败
        // if (ethToUsdPriceOracle != address(0) && bnbToUsdPriceOracle != address(0)) {
        //     return (0, 0);
        // }

        // address referenceOracle = address(0);
        
        // if (ethToUsdPriceOracle != address(0) && bnbToUsdPriceOracle == address(0)) {
        //     referenceOracle = ethToUsdPriceOracle;
        // }

        // if (ethToUsdPriceOracle == address(0) && bnbToUsdPriceOracle != address(0)) {
        //     referenceOracle = bnbToUsdPriceOracle;
        // }

        if (nativeToUsdPriceOracle == address(0)) {
            return (0, 0);
        }
        address referenceOracle = nativeToUsdPriceOracle;

        // 构造 chainlink 合约实例
        AggregatorInterface chainlinkContract = AggregatorInterface(
            referenceOracle
        );
        // 获取 ETH/USD 交易对的价格，单位是 1e8
        int256 basePrice = chainlinkContract.latestAnswer();

        (,,, uint256 updatedAt,) = chainlinkContract.latestRoundData();


        // 若要获取 ETH 的价格，则返回 1e8 * 1e10 = 1e18
        // ETH上的ETH，BSC的BNB，直接调用chainlink，或者设置的直接调用的token，直接调用chainlink
        if (isEthOrBnB(token)) {
            return (uint256(basePrice).mul(1e10), updatedAt);
        }

        if (directTokenMap[token]) {
            // 构造 chainlink 合约实例
            chainlinkContract = AggregatorInterface(tokenChainlinkMap[token]);
    
            (,,,updatedAt,) = chainlinkContract.latestRoundData();

            // 获取 XXX/USD 交易对的价格，单位是 1e8
            basePrice = chainlinkContract.latestAnswer();
            return (uint256(basePrice).mul(1e10), updatedAt);
        }

        // // 获取 token/ETH 交易对的价格（目前是 USDT 和 USDC ），单位是 1e18
        // FIXME: matic网络无xxx_matic交易对
        chainlinkContract = AggregatorInterface(tokenChainlinkMap[token]);
        int256 tokenPrice = chainlinkContract.latestAnswer();

        (,,, uint256 updatedAt1,) = chainlinkContract.latestRoundData();
        
        uint256 latest = updatedAt1 > updatedAt ? updatedAt1 : updatedAt;

        return (uint256(basePrice).mul(uint256(tokenPrice)).div(1e8), latest);
    }

    struct ChainlinkPrice {
        uint256 px;
        uint256 updatedAt;
    }

    function gets(address[] calldata tokens) external view returns (ChainlinkPrice[] memory) {
        uint n = tokens.length;
        ChainlinkPrice[] memory res = new ChainlinkPrice[](n);
        for (uint i = 0; i < n; i++) {
            (res[i].px, res[i].updatedAt) = getLatestRoundData(tokens[i]);
        }

        return res;
    }
}

[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"bool","name":"direct","type":"bool"}],"name":"SetDirectTokenMap","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address[]","name":"tokens","type":"address[]"},{"indexed":false,"internalType":"bool","name":"direct","type":"bool"}],"name":"SetDirectTokenMaps","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"address","name":"chainlink","type":"address"}],"name":"SetTokenChainlinkMap","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address[]","name":"tokens","type":"address[]"},{"indexed":false,"internalType":"address[]","name":"chainlinks","type":"address[]"}],"name":"SetTokenChainlinkMaps","type":"event"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"bnbToUsdPriceOracle","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"directTokenMap","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ethToUsdPriceOracle","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"get","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"getChainLinkPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"getLatestRoundData","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"}],"name":"gets","outputs":[{"components":[{"internalType":"uint256","name":"px","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"}],"internalType":"struct ChainlinkWrapper.ChainlinkPrice[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_multiSig","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"isEthOrBnB","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"multiSig","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nativeToUsdPriceOracle","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"prices","outputs":[{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"uint256","name":"expiration","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_admin","type":"address"}],"name":"setAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_bnbToUsdPriceOracle","type":"address"}],"name":"setBnbToUsdPriceOracle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"bool","name":"direct","type":"bool"}],"name":"setDirectTokenMap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"bool","name":"direct","type":"bool"}],"name":"setDirectTokenMaps","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_ethToUsdPriceOracle","type":"address"}],"name":"setEthToUsdPriceOracle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_multiSig","type":"address"}],"name":"setMultiSig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_nativeToUsdPriceOracle","type":"address"}],"name":"setNativeToUsdPriceOracle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"chainlink","type":"address"}],"name":"setTokenChainlinkMap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"address[]","name":"chainlinks","type":"address[]"}],"name":"setTokenChainlinkMaps","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"tokenChainlinkMap","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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