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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import '../../interfaces/IFeedRegistry.sol';
import {IAggregator} from '../../interfaces/IAggregator.sol';
import {ProxyCall} from '../../libraries/ProxyCall.sol';

/// @title Registry aggregating information from ChainlinkProxies and the feed itself
/// @notice This contract is used to store and retrieve information about feeds
/// @dev To reduce gas costs, the contract calls the dataFeedStore directly instead of using the ChainlinkProxy
contract FeedRegistry is IFeedRegistry {
  /// @notice The data feed store contract
  address internal immutable DATA_FEED_STORE;
  /// @inheritdoc IFeedRegistry
  address public immutable override OWNER;

  /// @notice Feed data for a given pair
  mapping(address => mapping(address => FeedData)) internal feedData;

  /// @notice Constructor
  /// @param _owner The owner of the contract
  /// @param _dataFeedStore The address of the data feed store
  constructor(address _owner, address _dataFeedStore) {
    OWNER = _owner;
    DATA_FEED_STORE = _dataFeedStore;
  }

  /// @inheritdoc IChainlinkFeedRegistry
  function decimals(
    address base,
    address quote
  ) external view override returns (uint8) {
    return feedData[base][quote].decimals;
  }

  /// @inheritdoc IChainlinkFeedRegistry
  function description(
    address base,
    address quote
  ) external view override returns (string memory) {
    return feedData[base][quote].description;
  }

  /// @inheritdoc IChainlinkFeedRegistry
  function latestAnswer(
    address base,
    address quote
  ) external view override returns (int256) {
    return ProxyCall._latestAnswer(feedData[base][quote].key, DATA_FEED_STORE);
  }

  /// @inheritdoc IChainlinkFeedRegistry
  function getRoundData(
    address base,
    address quote,
    uint80 _roundId
  ) external view override returns (uint80, int256, uint256, uint256, uint80) {
    return
      ProxyCall._getRoundData(
        _roundId,
        feedData[base][quote].key,
        DATA_FEED_STORE
      );
  }

  /// @inheritdoc IChainlinkFeedRegistry
  function getFeed(
    address base,
    address quote
  ) external view override returns (IChainlinkAggregator) {
    return feedData[base][quote].aggregator;
  }

  /// @inheritdoc IFeedRegistry
  function setFeeds(Feed[] calldata feeds) external override {
    if (msg.sender != OWNER) {
      revert OnlyOwner();
    }

    for (uint256 i = 0; i < feeds.length; i++) {
      feedData[feeds[i].base][feeds[i].quote] = FeedData(
        IChainlinkAggregator(feeds[i].feed),
        IAggregator(feeds[i].feed).key(),
        IAggregator(feeds[i].feed).decimals(),
        IAggregator(feeds[i].feed).description()
      );
    }
  }

  /// @inheritdoc IChainlinkFeedRegistry
  function latestRound(
    address base,
    address quote
  ) external view override returns (uint256) {
    return ProxyCall._latestRound(feedData[base][quote].key, DATA_FEED_STORE);
  }

  /// @inheritdoc IChainlinkFeedRegistry
  function latestRoundData(
    address base,
    address quote
  ) external view override returns (uint80, int256, uint256, uint256, uint80) {
    return
      ProxyCall._latestRoundData(feedData[base][quote].key, DATA_FEED_STORE);
  }
}

/**
 * SPDX-FileCopyrightText: Copyright (c) 2021 SmartContract ChainLink Limited SEZC
 *
 * SPDX-License-Identifier: MIT
 */
pragma solidity ^0.8.24;

interface IChainlinkAggregator {
  /// @notice Decimals for the feed data
  /// @return decimals The decimals of the feed
  function decimals() external view returns (uint8);

  /// @notice Description text for the feed data
  /// @return description The description of the feed
  function description() external view returns (string memory);

  /// @notice Get the latest answer for the feed
  /// @return answer The latest value stored
  function latestAnswer() external view returns (int256);

  /// @notice Get the latest round ID for the feed
  /// @return roundId The latest round ID
  function latestRound() external view returns (uint256);

  /// @notice Get the data for a round at a given round ID
  /// @param _roundId The round ID to retrieve the data for
  /// @return roundId The round ID
  /// @return answer The value stored for the round
  /// @return startedAt Timestamp of when the value was stored
  /// @return updatedAt Same as startedAt
  /// @return answeredInRound Same as roundId
  function getRoundData(
    uint80 _roundId
  )
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  /// @notice Get the latest round data available
  /// @return roundId The latest round ID for the feed
  /// @return answer The value stored for the round
  /// @return startedAt Timestamp of when the value was stored
  /// @return updatedAt Same as startedAt
  /// @return answeredInRound Same as roundId
  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );
}

/**
 * SPDX-FileCopyrightText: Copyright (c) 2021 SmartContract ChainLink Limited SEZC
 *
 * SPDX-License-Identifier: MIT
 */
pragma solidity ^0.8.24;

import {IChainlinkAggregator} from './IChainlinkAggregator.sol';

interface IChainlinkFeedRegistry {
  /// @notice Get decimals for a feed pair
  /// @param base The base asset of the feed
  /// @param quote The quote asset of the feed
  /// @return decimals The decimals of the feed pair
  function decimals(address base, address quote) external view returns (uint8);

  /// @notice Get description for a feed pair
  /// @param base The base asset of the feed
  /// @param quote The quote asset of the feed
  /// @return description The description of the feed pair
  function description(
    address base,
    address quote
  ) external view returns (string memory);

  /// @notice Get the latest answer for a feed pair
  /// @param base The base asset of the feed
  /// @param quote The quote asset of the feed
  /// @return answer The value sotred for the feed pair
  function latestAnswer(
    address base,
    address quote
  ) external view returns (int256 answer);

  /// @notice Get the latest round ID for a feed pair
  /// @param base The base asset of the feed
  /// @param quote The quote asset of the feed
  /// @return roundId The latest round ID
  function latestRound(
    address base,
    address quote
  ) external view returns (uint256 roundId);

  /// @notice Get the round data for a feed pair at a given round ID
  /// @param base The base asset of the feed
  /// @param quote The quote asset of the feed
  /// @param _roundId The round ID to retrieve data for
  /// @return roundId The round ID
  /// @return answer The value stored for the feed at the given round ID
  /// @return startedAt The timestamp when the value was stored
  /// @return updatedAt Same as startedAt
  /// @return answeredInRound Same as roundId
  function getRoundData(
    address base,
    address quote,
    uint80 _roundId
  )
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  /// @notice Get the latest round data for a feed pair
  /// @param base The base asset of the feed
  /// @param quote The quote asset of the feed
  /// @return roundId The latest round ID stored for the feed pair
  /// @return answer The latest value stored for the feed pair
  /// @return startedAt The timestamp when the value was stored
  /// @return updatedAt Same as startedAt
  /// @return answeredInRound Same as roundId
  function latestRoundData(
    address base,
    address quote
  )
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  /// @notice Get the ChainlinkProxy contract for a feed pair
  /// @param base The base asset of the feed
  /// @param quote The quote asset of the feed
  /// @return aggregator The ChainlinkProxy contract given pair
  function getFeed(
    address base,
    address quote
  ) external view returns (IChainlinkAggregator aggregator);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import {IChainlinkAggregator} from './chainlink/IChainlinkAggregator.sol';

interface IAggregator is IChainlinkAggregator {
  /// @notice The feed data this contract is responsible for
  /// @dev This is the key ID for the mapping in the dataFeedStore
  /// @return key The key ID for the feed
  function key() external view returns (uint32);

  /// @notice The dataFeedStore this contract is responsible for
  /// @dev The address of the underlying contract that stores the data
  /// @return dataFeedStore The address of the dataFeedStore
  function dataFeedStore() external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import {IChainlinkFeedRegistry, IChainlinkAggregator} from './chainlink/IChainlinkFeedRegistry.sol';

interface IFeedRegistry is IChainlinkFeedRegistry {
  struct FeedData {
    IChainlinkAggregator aggregator;
    uint32 key;
    uint8 decimals;
    string description;
  }

  struct Feed {
    address base;
    address quote;
    address feed;
  }

  error OnlyOwner();

  /// @notice Contract owner
  /// @return owner The address of the owner
  function OWNER() external view returns (address);

  /// @notice Set the feed for a given pair
  /// @dev Stores immutable values (decimals, key, description) and contract address from ChainlinkProxy
  /// @param feeds Array of base, quote and feed address data
  function setFeeds(Feed[] calldata feeds) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

/// @title ProxyCall
/// @notice Library for calling dataFeedStore functions
/// @dev Contains utility functions for calling gas efficiently dataFeedStore functions and decoding return data
library ProxyCall {
  /// @notice Gets the latest answer from the dataFeedStore
  /// @param key The key ID for the feed
  /// @param dataFeedStore The address of the dataFeedStore contract
  /// @return answer The latest stored value after being decoded
  function _latestAnswer(
    uint32 key,
    address dataFeedStore
  ) internal view returns (int256) {
    return
      int256(
        uint256(
          uint192(
            bytes24(
              _callDataFeed(dataFeedStore, abi.encodePacked(0x80000000 | key))
            )
          )
        )
      );
  }

  /// @notice Gets the round data from the dataFeedStore
  /// @param _roundId The round ID to retrieve data for
  /// @param key The key ID for the feed
  /// @param dataFeedStore The address of the dataFeedStore contract
  /// @return roundId The round ID
  /// @return answer The value stored for the feed at the given round ID
  /// @return startedAt The timestamp when the value was stored
  /// @return updatedAt Same as startedAt
  /// @return answeredInRound Same as roundId
  function _getRoundData(
    uint80 _roundId,
    uint32 key,
    address dataFeedStore
  )
    internal
    view
    returns (uint80, int256 answer, uint256 startedAt, uint256, uint80)
  {
    (answer, startedAt) = _decodeData(
      _callDataFeed(
        dataFeedStore,
        abi.encodeWithSelector(bytes4(0x20000000 | key), _roundId)
      )
    );

    return (_roundId, answer, startedAt, startedAt, _roundId);
  }

  /// @notice Gets the latest round ID for a given feed from the dataFeedStore
  /// @dev Using assembly achieves lower gas costs
  /// @param key The key ID for the feed
  /// @param dataFeedStore The address of the dataFeedStore contract
  /// @return roundId The latest round ID
  function _latestRound(
    uint32 key,
    address dataFeedStore
  ) internal view returns (uint256 roundId) {
    // using assembly staticcall costs less gas than using a view function
    assembly {
      // get free memory pointer
      let ptr := mload(0x40)

      // store selector in memory at location 0
      mstore(0, shl(224, or(0x40000000, key)))

      // call dataFeedStore with selector 0xc0000000 | key (4 bytes) and store return value (64 bytes) at memory location ptr
      let success := staticcall(gas(), dataFeedStore, 0, 4, ptr, 64)

      // revert if call failed
      if iszero(success) {
        revert(0, 0)
      }

      // load return value from memory at location ptr
      // roundId is stored in the second 32 bytes of the return 64 bytes
      roundId := mload(add(ptr, 32))
    }
  }

  /// @notice Gets the latest round data for a given feed from the dataFeedStore
  /// @dev Using assembly achieves lower gas costs
  /// @param key The key ID for the feed
  /// @param dataFeedStore The address of the dataFeedStore contract
  /// @return roundId The latest round ID
  /// @return answer The latest stored value after being decoded
  /// @return startedAt The timestamp when the value was stored
  /// @return updatedAt Same as startedAt
  /// @return answeredInRound Same as roundId
  function _latestRoundData(
    uint32 key,
    address dataFeedStore
  )
    internal
    view
    returns (uint80 roundId, int256 answer, uint256 startedAt, uint256, uint80)
  {
    bytes32 returnData;

    // using assembly staticcall costs less gas than using a view function
    assembly {
      // get free memory pointer
      let ptr := mload(0x40)

      // store selector in memory at location 0
      mstore(0x00, shl(224, or(0xc0000000, key)))

      // call dataFeedStore with selector 0xc0000000 | key (4 bytes) and store return value (64 bytes) at memory location ptr
      let success := staticcall(gas(), dataFeedStore, 0x00, 4, ptr, 64)

      // revert if call failed
      if iszero(success) {
        revert(0, 0)
      }

      // assign return value to returnData
      returnData := mload(ptr)

      // load return value from memory at location ptr
      // roundId is stored in the second 32 bytes of the return 64 bytes
      roundId := mload(add(ptr, 32))
    }

    (answer, startedAt) = _decodeData(returnData);

    return (roundId, answer, startedAt, startedAt, roundId);
  }

  /// @notice Calls the dataFeedStore with the given data
  /// @dev Using assembly achieves lower gas costs
  /// Used as a call() function to dataFeedStore
  /// @param dataFeedStore The address of the dataFeedStore contract
  /// @param data The data to call the dataFeedStore with
  /// @return returnData The return value from the dataFeedStore
  function _callDataFeed(
    address dataFeedStore,
    bytes memory data
  ) internal view returns (bytes32 returnData) {
    // using assembly staticcall costs less gas than using a view function
    assembly {
      // get free memory pointer
      let ptr := mload(0x40)

      // call dataFeedStore with data and store return value (32 bytes) at memory location ptr
      let success := staticcall(
        gas(), // gas remaining
        dataFeedStore, // address to call
        add(data, 32), // location of data to call (skip first 32 bytes of data which is the length of data)
        mload(data), // size of data to call
        ptr, // where to store the return data
        32 // how much data to store
      )

      // revert if call failed
      if iszero(success) {
        revert(0, 0)
      }

      // assign loaded return value at memory location ptr to returnData
      returnData := mload(ptr)
    }
  }

  /// @notice Decodes the return data from the dataFeedStore
  /// @param data The data to decode
  /// @return answer The value stored for the feed at the given round ID
  /// @return timestamp The timestamp when the value was stored
  function _decodeData(bytes32 data) internal pure returns (int256, uint256) {
    return (int256(uint256(uint192(bytes24(data)))), uint64(uint256(data)));
  }
}

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

[{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_dataFeedStore","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"OnlyOwner","type":"error"},{"inputs":[],"name":"OWNER","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"base","type":"address"},{"internalType":"address","name":"quote","type":"address"}],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"base","type":"address"},{"internalType":"address","name":"quote","type":"address"}],"name":"description","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"base","type":"address"},{"internalType":"address","name":"quote","type":"address"}],"name":"getFeed","outputs":[{"internalType":"contract IChainlinkAggregator","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"base","type":"address"},{"internalType":"address","name":"quote","type":"address"},{"internalType":"uint80","name":"_roundId","type":"uint80"}],"name":"getRoundData","outputs":[{"internalType":"uint80","name":"","type":"uint80"},{"internalType":"int256","name":"","type":"int256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint80","name":"","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"base","type":"address"},{"internalType":"address","name":"quote","type":"address"}],"name":"latestAnswer","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"base","type":"address"},{"internalType":"address","name":"quote","type":"address"}],"name":"latestRound","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"base","type":"address"},{"internalType":"address","name":"quote","type":"address"}],"name":"latestRoundData","outputs":[{"internalType":"uint80","name":"","type":"uint80"},{"internalType":"int256","name":"","type":"int256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint80","name":"","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"base","type":"address"},{"internalType":"address","name":"quote","type":"address"},{"internalType":"address","name":"feed","type":"address"}],"internalType":"struct IFeedRegistry.Feed[]","name":"feeds","type":"tuple[]"}],"name":"setFeeds","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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00000000000000000000000023bc561ea93063b0cd12b6e3c690d40c93e29692000000000000000000000000ee5a4826068c5326a7f06fd6c7cbf816f096846c

-----Decoded View---------------
Arg [0] : _owner (address): 0x23BC561ea93063B0cD12b6E3c690D40c93e29692
Arg [1] : _dataFeedStore (address): 0xeE5a4826068C5326a7f06fD6c7cBf816F096846c

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000023bc561ea93063b0cd12b6e3c690d40c93e29692
Arg [1] : 000000000000000000000000ee5a4826068c5326a7f06fd6c7cbf816f096846c