Contract Source Code (Solidity Standard Json-Input format)

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// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.20;

import { IKelpLRTConfig } from "src/interfaces/kelp/IKelpLRTConfig.sol";
import { IKelpLRTOracle } from "src/interfaces/kelp/IKelpLRTOracle.sol";
import { IMinimalAggregatorV3Interface } from "src/interfaces/IMinimalAggregatorV3Interface.sol";

/// @title RsEthToEthExchangeRateAdapter
/// @author Origami Finance
/// @custom:contact [email protected]
/// @notice rsETH/ETH exchange rate price feed.
/// @dev This contract should only be deployed on Ethereum.
contract RsEthToEthExchangeRateAdapter is IMinimalAggregatorV3Interface {
    /// @inheritdoc IMinimalAggregatorV3Interface
    // @dev The calculated price has 18 decimals precision, whatever the value of `decimals`.
    uint8 public constant override decimals = 18;

    /// @notice The description of the price feed.
    string public constant description = "rsETH/ETH exchange rate";

    /// @notice The address of the Kelp LRT Config contract in Ethereum.
    IKelpLRTConfig public constant KELP_LRT_CONFIG = IKelpLRTConfig(0x947Cb49334e6571ccBFEF1f1f1178d8469D65ec7);

    bytes32 public constant LRT_ORACLE = keccak256("LRT_ORACLE");

    /// @inheritdoc IMinimalAggregatorV3Interface
    /// @dev Returns zero for roundId, startedAt, updatedAt and answeredInRound.
    /// @dev Silently overflows if `rsETHPrice`'s return value is greater than `type(int256).max`.
    function latestRoundData() external view override returns (uint80, int256, uint256, uint256, uint80) {
        IKelpLRTOracle lrtOracle = IKelpLRTOracle(KELP_LRT_CONFIG.getContract(LRT_ORACLE));
        uint256 rate = lrtOracle.rsETHPrice();
        return (0, int256(rate), 0, 0, 0);
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

interface IKelpLRTConfig {
    function getContract(bytes32 contractId) external view returns (address);
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

interface IKelpLRTOracle {
    function rsETHPrice() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

/// @dev Inspired by
/// https://github.com/smartcontractkit/chainlink/blob/master/contracts/src/v0.8/shared/interfaces/AggregatorV3Interface.sol
/// @dev This is the minimal feed interface required by `MorphoChainlinkOracleV2`.
interface IMinimalAggregatorV3Interface {
    /// @notice Returns the precision of the feed.
    function decimals() external view returns (uint8);

    /// @notice Returns Chainlink's `latestRoundData` return values.
    /// @notice Only the `answer` field is used by `MorphoChainlinkOracleV2`.
    function latestRoundData()
        external
        view
        returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}

{
  "remappings": [
    "forge-std/=lib/forge-std/src/",
    "src/=src/",
    "test/=test/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false,
  "libraries": {}
}

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[{"inputs":[],"name":"KELP_LRT_CONFIG","outputs":[{"internalType":"contract IKelpLRTConfig","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"LRT_ORACLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"description","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"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"}]

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