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// SPDX-License-Identifier: MIT
pragma solidity 0.8.22;
pragma experimental ABIEncoderV2;

import {SafeMath} from '@openzeppelin/contracts/utils/math/SafeMath.sol';
import {Ownable} from '@openzeppelin/contracts/access/Ownable.sol';
import {IPriceOracleGetter} from './interfaces/IPriceOracleGetter.sol';

contract PriceOracle is Ownable, IPriceOracleGetter {
  using SafeMath for uint256;

  struct Price {
    uint64 blockNumber;
    uint64 blockTimestamp;
    uint128 price;
  }

  event PricesSubmitted(address sybil, address[] assets, uint128[] prices);
  event SybilAuthorized(address indexed sybil);
  event SybilUnauthorized(address indexed sybil);

  uint256 public constant PERCENTAGE_BASE = 1e4;

  mapping(address => Price) private _prices;

  mapping(address => bool) private _sybils;

  modifier onlySybil {
    _requireWhitelistedSybil(msg.sender);
    _;
  }

  function authorizeSybil(address sybil) external onlyOwner {
    _sybils[sybil] = true;

    emit SybilAuthorized(sybil);
  }

  function unauthorizeSybil(address sybil) external onlyOwner {
    _sybils[sybil] = false;

    emit SybilUnauthorized(sybil);
  }

  function submitPrices(address[] calldata assets, uint128[] calldata prices) external onlySybil {
    require(assets.length == prices.length, 'INCONSISTENT_PARAMS_LENGTH');
    for (uint256 i = 0; i < assets.length; i++) {
      _prices[assets[i]] = Price(uint64(block.number), uint64(block.timestamp), prices[i]);
    }

    emit PricesSubmitted(msg.sender, assets, prices);
  }

  function getAssetPrice(address asset) external view override returns (uint256) {
    return uint256(_prices[asset].price);
  }

  function isSybilWhitelisted(address sybil) public view returns (bool) {
    return _sybils[sybil];
  }

  function getPricesData(address[] calldata assets) external view returns (Price[] memory) {
    Price[] memory result = new Price[](assets.length);
    for (uint256 i = 0; i < assets.length; i++) {
      result[i] = _prices[assets[i]];
    }
    return result;
  }

  function filterCandidatePricesByDeviation(
    uint256 deviation,
    address[] calldata assets,
    uint256[] calldata candidatePrices
  ) external view returns (address[] memory, uint256[] memory) {
    require(assets.length == candidatePrices.length, 'INCONSISTENT_PARAMS_LENGTH');
    address[] memory filteredAssetsWith0s = new address[](assets.length);
    uint256[] memory filteredCandidatesWith0s = new uint256[](assets.length);
    uint256 end0sInLists;
    for (uint256 i = 0; i < assets.length; i++) {
      uint128 currentOraclePrice = _prices[assets[i]].price;
      if (
        uint256(currentOraclePrice) >
        candidatePrices[i].mul(PERCENTAGE_BASE.add(deviation)).div(PERCENTAGE_BASE) ||
        uint256(currentOraclePrice) <
        candidatePrices[i].mul(PERCENTAGE_BASE.sub(deviation)).div(PERCENTAGE_BASE)
      ) {
        filteredAssetsWith0s[end0sInLists] = assets[i];
        filteredCandidatesWith0s[end0sInLists] = candidatePrices[i];
        end0sInLists++;
      }
    }
    address[] memory resultAssets = new address[](end0sInLists);
    uint256[] memory resultPrices = new uint256[](end0sInLists);
    for (uint256 i = 0; i < end0sInLists; i++) {
      resultAssets[i] = filteredAssetsWith0s[i];
      resultPrices[i] = filteredCandidatesWith0s[i];
    }

    return (resultAssets, resultPrices);
  }

  function _requireWhitelistedSybil(address sybil) internal view {
    require(isSybilWhitelisted(sybil), 'INVALID_SYBIL');
  }
}

// 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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // 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 (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @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) {
        return a + b;
    }

    /**
     * @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 a - b;
    }

    /**
     * @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) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting 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 a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting 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) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * 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) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.22;

/**
 * @title IPriceOracleGetter interface
 * @notice Interface for the Archly price oracle.
 **/

interface IPriceOracleGetter {
  /**
   * @dev returns the asset price
   * @param asset the address of the asset
   * @return the price of the asset
   **/
  function getAssetPrice(address asset) external view returns (uint256);
}

{
  "evmVersion": "paris",
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"sybil","type":"address"},{"indexed":false,"internalType":"address[]","name":"assets","type":"address[]"},{"indexed":false,"internalType":"uint128[]","name":"prices","type":"uint128[]"}],"name":"PricesSubmitted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sybil","type":"address"}],"name":"SybilAuthorized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sybil","type":"address"}],"name":"SybilUnauthorized","type":"event"},{"inputs":[],"name":"PERCENTAGE_BASE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"sybil","type":"address"}],"name":"authorizeSybil","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"deviation","type":"uint256"},{"internalType":"address[]","name":"assets","type":"address[]"},{"internalType":"uint256[]","name":"candidatePrices","type":"uint256[]"}],"name":"filterCandidatePricesByDeviation","outputs":[{"internalType":"address[]","name":"","type":"address[]"},{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"asset","type":"address"}],"name":"getAssetPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"assets","type":"address[]"}],"name":"getPricesData","outputs":[{"components":[{"internalType":"uint64","name":"blockNumber","type":"uint64"},{"internalType":"uint64","name":"blockTimestamp","type":"uint64"},{"internalType":"uint128","name":"price","type":"uint128"}],"internalType":"struct PriceOracle.Price[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"sybil","type":"address"}],"name":"isSybilWhitelisted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"assets","type":"address[]"},{"internalType":"uint128[]","name":"prices","type":"uint128[]"}],"name":"submitPrices","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sybil","type":"address"}],"name":"unauthorizeSybil","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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