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// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;
pragma experimental ABIEncoderV2;

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

import '../interfaces/IBaseOracle.sol';
import '../interfaces/band/IStdReference.sol';

contract BandAdapterOracle is IBaseOracle, Ownable {
    event SetSymbol(address token, string symbol);
    event SetRef(address ref);
    event SetMaxDelayTime(address token, uint256 maxDelayTime);

    IStdReference public ref; // Standard reference

    mapping(address => string) public symbols; // Mapping from token to symbol string
    mapping(address => uint256) public maxDelayTimes; // Mapping from token address to max delay time

    constructor(IStdReference _ref) {
        ref = _ref;
    }

    /// @dev Set standard reference source
    /// @param _ref Standard reference source
    function setRef(IStdReference _ref) external onlyOwner {
        ref = _ref;
        emit SetRef(address(_ref));
    }

    /// @dev Set token symbols
    /// @param tokens List of tokens
    /// @param syms List of string symbols
    function setSymbols(address[] memory tokens, string[] memory syms)
        external
        onlyOwner
    {
        require(syms.length == tokens.length, 'length mismatch');
        for (uint256 idx = 0; idx < syms.length; idx++) {
            symbols[tokens[idx]] = syms[idx];
            emit SetSymbol(tokens[idx], syms[idx]);
        }
    }

    /// @dev Set max delay time for each token
    /// @param tokens list of tokens to set max delay
    /// @param maxDelays list of max delay times to set to
    function setMaxDelayTimes(
        address[] calldata tokens,
        uint256[] calldata maxDelays
    ) external onlyOwner {
        require(tokens.length == maxDelays.length, 'length mismatch');
        for (uint256 idx = 0; idx < tokens.length; idx++) {
            maxDelayTimes[tokens[idx]] = maxDelays[idx];
            emit SetMaxDelayTime(tokens[idx], maxDelays[idx]);
        }
    }

    /// @dev Return the USD based price of the given input, multiplied by 10**18.
    /// @param token The ERC-20 token to check the value.
    function getPrice(address token) external view override returns (uint256) {
        string memory sym = symbols[token];
        uint256 maxDelayTime = maxDelayTimes[token];
        require(bytes(sym).length != 0, 'no mapping');
        require(maxDelayTime != 0, 'max delay time not set');
        IStdReference.ReferenceData memory data = ref.getReferenceData(
            sym,
            'USD'
        );
        require(
            data.lastUpdatedBase >= block.timestamp - maxDelayTime,
            'delayed base data'
        );
        require(
            data.lastUpdatedQuote >= block.timestamp - maxDelayTime,
            'delayed quote data'
        );
        return data.rate;
    }
}

// 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);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

interface IBaseOracle {
    /// @dev Return the USD based price of the given input, multiplied by 10**18.
    /// @param token The ERC-20 token to check the value.
    function getPrice(address token) external view returns (uint256);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

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.
    }

    /// @dev 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);

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

// 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;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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000000000000000000000000da7a001b254cd22e46d3eab04d937489c93174c3

-----Decoded View---------------
Arg [0] : _ref (address): 0xDA7a001b254CD22e46d3eAB04d937489c93174C3

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000da7a001b254cd22e46d3eab04d937489c93174c3