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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {IBasicFeed} from '../../interfaces/IBasicFeed.sol';
import {IExtendedFeed} from '../../interfaces/IExtendedFeed.sol';

/**
 * @title OneUSDFixedAdapter
 * @author BGD Labs
 * @notice Price adapter returning a fixed 1 USD price with 8 decimals (Chainlink-standard)
 */
contract OneUSDFixedAdapter is IExtendedFeed {
  int256 public constant ONE_USD = 1e8;

  /// @inheritdoc IBasicFeed
  function description() external pure returns (string memory) {
    return 'ONE USD';
  }

  /// @inheritdoc IBasicFeed
  function DECIMALS() public pure returns (uint8) {
    return 8;
  }

  /// @inheritdoc IBasicFeed
  function decimals() external pure returns (uint8) {
    return DECIMALS();
  }

  /// @inheritdoc IBasicFeed
  function latestAnswer() public pure returns (int256) {
    return ONE_USD;
  }

  /// @inheritdoc IExtendedFeed
  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    )
  {
    uint256 ts = block.timestamp;
    // The roundId (and answeredInRound) concept in this type of "static" feed is unapplicable,
    // so returning explicitly zero to indicate it should not be consumed
    return (0, latestAnswer(), ts, ts, 0);
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IBasicFeed {
  /**
   * @notice Returns the description of the feed
   * @return string description
   */
  function description() external view returns (string memory);

  /**
   * @notice Returns the feed decimals (for tooling compatibility)
   * @return uint8 decimals
   */
  function DECIMALS() external view returns (uint8);

  /**
   * @notice Returns the feed decimals
   * @return uint8 decimals
   */
  function decimals() external view returns (uint8);

  /**
   * @notice Returns the fixed hardcoded price of the feed
   * @return int256 latestAnswer
   */
  function latestAnswer() external view returns (int256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

interface IExtendedFeed is IBasicFeed {
  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );
}

{
  "remappings": [
    "forge-std/=lib/forge-std/src/",
    "aave-address-book/=lib/aave-address-book/src/",
    "aave-helpers/=lib/aave-helpers/src/",
    "solidity-utils/=lib/aave-address-book/lib/aave-v3-origin/lib/solidity-utils/src/",
    "aave-v3-origin/=lib/aave-address-book/lib/aave-v3-origin/src/",
    "@openzeppelin/contracts-upgradeable/=lib/aave-address-book/lib/aave-v3-origin/lib/solidity-utils/lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts/=lib/aave-address-book/lib/aave-v3-origin/lib/solidity-utils/lib/openzeppelin-contracts-upgradeable/lib/openzeppelin-contracts/contracts/",
    "aave-v3-origin-tests/=lib/aave-helpers/lib/aave-address-book/lib/aave-v3-origin/tests/",
    "cl-synchronicity-price-adapter/=lib/cl-synchronicity-price-adapter/",
    "ds-test/=lib/cl-synchronicity-price-adapter/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/aave-address-book/lib/aave-v3-origin/lib/solidity-utils/lib/openzeppelin-contracts-upgradeable/lib/erc4626-tests/",
    "halmos-cheatcodes/=lib/aave-address-book/lib/aave-v3-origin/lib/solidity-utils/lib/openzeppelin-contracts-upgradeable/lib/halmos-cheatcodes/src/",
    "openzeppelin-contracts-upgradeable/=lib/aave-address-book/lib/aave-v3-origin/lib/solidity-utils/lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/aave-address-book/lib/aave-v3-origin/lib/solidity-utils/lib/openzeppelin-contracts-upgradeable/lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "shanghai",
  "viaIR": false
}

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[{"inputs":[],"name":"DECIMALS","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"ONE_USD","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":"pure","type":"function"},{"inputs":[],"name":"latestAnswer","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"pure","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"}]

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