Contract 0xDA7a001b254CD22e46d3eAB04d937489c93174C3

/**
 *Submitted for verification at clvscan.com on 2022-05-30
*/

/**
 *Submitted for verification at Etherscan.io on 2021-02-11
*/

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.6.11;
pragma experimental ABIEncoderV2;

/*
 * @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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

/**
 * @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.
 */
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 () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

interface IStdReference {
    /// A structure returned whenever someone requests for standard reference data.
    struct ReferenceData {
        uint256 rate; // base/quote exchange rate, multiplied by 1e18.
        uint256 lastUpdatedBase; // UNIX epoch of the last time when base price gets updated.
        uint256 lastUpdatedQuote; // UNIX epoch of the last time when quote price gets updated.
    }

    /// Returns the price data for the given base/quote pair. Revert if not available.
    function getReferenceData(string memory _base, string memory _quote)
        external
        view
        returns (ReferenceData memory);

    /// Similar to getReferenceData, but with multiple base/quote pairs at once.
    function getReferenceDataBulk(string[] memory _bases, string[] memory _quotes)
        external
        view
        returns (ReferenceData[] memory);
}

abstract contract StdReferenceBase is IStdReference {
    function getReferenceData(string memory _base, string memory _quote)
        public
        virtual
        override
        view
        returns (ReferenceData memory);

    function getReferenceDataBulk(string[] memory _bases, string[] memory _quotes)
        public
        override
        view
        returns (ReferenceData[] memory)
    {
        require(_bases.length == _quotes.length, "BAD_INPUT_LENGTH");
        uint256 len = _bases.length;
        ReferenceData[] memory results = new ReferenceData[](len);
        for (uint256 idx = 0; idx < len; idx++) {
            results[idx] = getReferenceData(_bases[idx], _quotes[idx]);
        }
        return results;
    }
}

contract StdReferenceProxy is Ownable, StdReferenceBase {
    IStdReference public ref;

    constructor(IStdReference _ref) public {
        ref = _ref;
    }

    /// Updates standard reference implementation. Only callable by the owner.
    function setRef(IStdReference _ref) public onlyOwner {
        ref = _ref;
    }

    /// Returns the price data for the given base/quote pair. Revert if not available.
    function getReferenceData(string memory _base, string memory _quote)
        public
        override
        view
        returns (ReferenceData memory)
    {
        return ref.getReferenceData(_base, _quote);
    }
}

[{"inputs":[{"internalType":"contract IStdReference","name":"_ref","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"string","name":"_base","type":"string"},{"internalType":"string","name":"_quote","type":"string"}],"name":"getReferenceData","outputs":[{"components":[{"internalType":"uint256","name":"rate","type":"uint256"},{"internalType":"uint256","name":"lastUpdatedBase","type":"uint256"},{"internalType":"uint256","name":"lastUpdatedQuote","type":"uint256"}],"internalType":"struct IStdReference.ReferenceData","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string[]","name":"_bases","type":"string[]"},{"internalType":"string[]","name":"_quotes","type":"string[]"}],"name":"getReferenceDataBulk","outputs":[{"components":[{"internalType":"uint256","name":"rate","type":"uint256"},{"internalType":"uint256","name":"lastUpdatedBase","type":"uint256"},{"internalType":"uint256","name":"lastUpdatedQuote","type":"uint256"}],"internalType":"struct IStdReference.ReferenceData[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ref","outputs":[{"internalType":"contract IStdReference","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IStdReference","name":"_ref","type":"address"}],"name":"setRef","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000a55d9ef16af921b70fed1421c1d298ca5a3a18f1

-----Decoded View---------------
Arg [0] : _ref (address): 0xa55d9ef16af921b70fed1421c1d298ca5a3a18f1

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000a55d9ef16af921b70fed1421c1d298ca5a3a18f1

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ipfs://9eefd9a35c715d63a2495dda784e00be232e9d323660430832b0104b4ee8144b