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// SPDX-License-Identifier: MIT
pragma solidity 0.8.27;

import {AggregatorV3Interface} from "../../../interfaces/AggregatorV3Interface.sol";

/// @title ChainlinkMiddleware Contract
/// @author Prime
contract ChainlinkMiddleware is AggregatorV3Interface {
	/// @notice Token price feed
	AggregatorV3Interface public chainlinkFeed;
	uint256 public immutable heartbeat;
	/// @notice How late since heartbeat before a price reverts
	uint256 public constant HEART_BEAT_TOLERANCE = 300;

	error AddressZero();
	error RoundNotComplete();
	error StalePrice();
	error InvalidPrice();

	/**
	 * @notice constructor
	 * @param _chainlinkFeed Chainlink price feed for token.
	 * @param _heartbeat heartbeat for feed
	 */
	constructor(address _chainlinkFeed, uint256 _heartbeat) {
		require(_chainlinkFeed != address(0), AddressZero());
		chainlinkFeed = AggregatorV3Interface(_chainlinkFeed);
		heartbeat = _heartbeat;
	}

	/**
	 * @notice Returns USD price in quote token.
	 * @dev supports 18 decimal token
	 * @return price of token in decimal 8
	 */
	function latestAnswer() external view virtual returns (uint256 price) {
		(, int256 answer, , , ) = chainlinkFeed.latestRoundData();
		return uint256(answer) / 10 ** 10; // Chainlink price is in 8 decimals, so we divide by 10^10 to get the price in 8 decimals
	}

	function validate(int256 _answer, uint256 _updatedAt) public view {
		if (_updatedAt == 0) revert RoundNotComplete();
		if (heartbeat > 0 && block.timestamp - _updatedAt >= heartbeat + HEART_BEAT_TOLERANCE) revert StalePrice();
		if (_answer <= 0) revert InvalidPrice();
	}

	/**
	 * @notice Returns version of chainlink price feed for token
	 */
	function version() external view returns (uint256) {
		return chainlinkFeed.version();
	}

	/**
	 * @notice Returns decimals of chainlink price feed for token
	 */
	function decimals() external pure returns (uint8) {
		return 8;
	}

	/**
	 * @notice Returns description of chainlink price feed for token
	 */
	function description() external view returns (string memory) {
		return chainlinkFeed.description();
	}

	/**
	 * @notice Get data about a round
	 * @param _roundId the requested round ID
	 * @return roundId is the round ID from the aggregator for which the data was retrieved.
	 * @return answer is the answer for the given round
	 * @return startedAt is the timestamp when the round was started.
	 * @return updatedAt is the timestamp when the round last was updated.
	 * @return answeredInRound is the round ID of the round in which the answer was computed.
	 */
	function getRoundData(
		uint80 _roundId
	)
		external
		view
		returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound)
	{
		(roundId, answer, startedAt, updatedAt, answeredInRound) = chainlinkFeed.getRoundData(_roundId);
		answer /= 10 ** 10;
	}

	/**
	 * @notice Returns data of latest round
	 * @return roundId is the round ID from the aggregator for which the data was retrieved.
	 * @return answer is the answer for the given round
	 * @return startedAt is the timestamp when the round was started.
	 * @return updatedAt is the timestamp when the round last was updated.
	 * @return answeredInRound is the round ID of the round in which the answer was computed.
	 */
	function latestRoundData()
		public
		view
		returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound)
	{
		(roundId, answer, startedAt, updatedAt, answeredInRound) = chainlinkFeed.latestRoundData();
		answer /= 10 ** 10;
	}
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.27;

interface AggregatorV3Interface {
	function decimals() external view returns (uint8);

	function description() external view returns (string memory);

	function version() external view returns (uint256);

	// getRoundData and latestRoundData should both raise "No data present"
	// if they do not have data to report, instead of returning unset values
	// which could be misinterpreted as actual reported values.
	function getRoundData(
		uint80 _roundId
	)
		external
		view
		returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);

	function latestRoundData()
		external
		view
		returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}

{
  "evmVersion": "shanghai",
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "remappings": [],
  "viaIR": true,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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[{"inputs":[{"internalType":"address","name":"_chainlinkFeed","type":"address"},{"internalType":"uint256","name":"_heartbeat","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AddressZero","type":"error"},{"inputs":[],"name":"InvalidPrice","type":"error"},{"inputs":[],"name":"RoundNotComplete","type":"error"},{"inputs":[],"name":"StalePrice","type":"error"},{"inputs":[],"name":"HEART_BEAT_TOLERANCE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"chainlinkFeed","outputs":[{"internalType":"contract AggregatorV3Interface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"description","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint80","name":"_roundId","type":"uint80"}],"name":"getRoundData","outputs":[{"internalType":"uint80","name":"roundId","type":"uint80"},{"internalType":"int256","name":"answer","type":"int256"},{"internalType":"uint256","name":"startedAt","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"},{"internalType":"uint80","name":"answeredInRound","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"heartbeat","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestAnswer","outputs":[{"internalType":"uint256","name":"price","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestRoundData","outputs":[{"internalType":"uint80","name":"roundId","type":"uint80"},{"internalType":"int256","name":"answer","type":"int256"},{"internalType":"uint256","name":"startedAt","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"},{"internalType":"uint80","name":"answeredInRound","type":"uint80"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"int256","name":"_answer","type":"int256"},{"internalType":"uint256","name":"_updatedAt","type":"uint256"}],"name":"validate","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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00000000000000000000000004edbf3904789d80b0c991e0b66577f2208a2be60000000000000000000000000000000000000000000000000000000000015180

-----Decoded View---------------
Arg [0] : _chainlinkFeed (address): 0x04EDBF3904789d80B0C991e0B66577F2208A2bE6
Arg [1] : _heartbeat (uint256): 86400

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000004edbf3904789d80b0c991e0b66577f2208a2be6
Arg [1] : 0000000000000000000000000000000000000000000000000000000000015180