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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/**
 * @title DolaFixedPriceFeed
 * @notice Fixed price feed for Dola
 * @dev This contract is used to provide a fixed price feed for DOLA within Inverse FiRM Protocol
 * Don't use it for external integrations
 */

contract DolaFixedPriceFeed {
    uint8 public constant DECIMALS = 18;
    int256 public constant PRICE = 1e18;
    string public constant description = "DOLA / USD";

    /**
     * @notice Retrieves the price and current timestamp for DOLA price feed
     * @dev This function doens't return the round ID, startedAt and answeredInRound as it's not relevant for DOLA price within Inverse Feeds system
     * @return roundId
     * @return usdPrice The fixed price of DOLA
     * @return startedAt
     * @return updatedAt The current timestamp
     * @return answeredInRound
     */
    function latestRoundData()
        public
        view
        returns (
            uint80 roundId,
            int256 usdPrice,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        )
    {
        return (0, PRICE, 0, block.timestamp, 0);
    }

    /**
     * @notice Returns the latest price only
     * @dev Unlike chainlink oracles, the latestAnswer will always be the same as in the latestRoundData
     * @return int256 Returns the finalized price
     */
    function latestAnswer() external view returns (int256) {
        (, int256 latestPrice, , , ) = latestRoundData();
        return latestPrice;
    }

    /**
     * @notice Retrieves number of decimals for the DOLA price feed conforming to the Chainlink standard
     * @return decimals The number of decimals
     */
    function decimals() public pure returns (uint8) {
        return DECIMALS;
    }
}

{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "solmate/=lib/solmate/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "shanghai",
  "viaIR": false,
  "libraries": {}
}

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[{"inputs":[],"name":"DECIMALS","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PRICE","outputs":[{"internalType":"int256","name":"","type":"int256"}],"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":[],"name":"latestAnswer","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"latestRoundData","outputs":[{"internalType":"uint80","name":"roundId","type":"uint80"},{"internalType":"int256","name":"usdPrice","type":"int256"},{"internalType":"uint256","name":"startedAt","type":"uint256"},{"internalType":"uint256","name":"updatedAt","type":"uint256"},{"internalType":"uint80","name":"answeredInRound","type":"uint80"}],"stateMutability":"view","type":"function"}]

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