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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.13;

import "../lib/rocketpool/contracts/interface/RocketStorageInterface.sol";
import "../lib/rocketpool/contracts/interface/network/RocketNetworkBalancesInterface.sol";
import "./interfaces/scroll/IScrollMessenger.sol";

import "./RocketScrollPriceOracle.sol";

/// @author Kane Wallmann (Rocket Pool)
/// @notice Retrieves the rETH exchange rate from Rocket Pool and submits it to the oracle contract on Scroll
contract RocketScrollPriceMessenger {
    // Immutables
    IScrollMessenger immutable l1ScrollMessenger;
    RocketStorageInterface immutable rocketStorage;
    RocketScrollPriceOracle immutable rocketL2ScrollPriceOracle;
    bytes32 immutable rocketNetworkBalancesKey;

    /// @notice The most recently submitted rate
    uint256 lastRate;

    constructor(RocketStorageInterface _rocketStorage, RocketScrollPriceOracle _rocketL2ScrollPriceOracle, IScrollMessenger _l1ScrollMessenger) {
        rocketStorage = _rocketStorage;
        rocketL2ScrollPriceOracle = _rocketL2ScrollPriceOracle;
        l1ScrollMessenger = _l1ScrollMessenger;
        // Precompute storage key for RocketNetworkBalances address
        rocketNetworkBalancesKey = keccak256(abi.encodePacked("contract.address", "rocketNetworkBalances"));
    }

    /// @notice Returns whether the rate has changed since it was last submitted
    function rateStale() external view returns (bool) {
        return rate() != lastRate;
    }

    /// @notice Returns the calculated rETH exchange rate
    function rate() public view returns (uint256) {
        // Retrieve the inputs from RocketNetworkBalances and calculate the rate
        RocketNetworkBalancesInterface rocketNetworkBalances = RocketNetworkBalancesInterface(rocketStorage.getAddress(rocketNetworkBalancesKey));
        uint256 supply = rocketNetworkBalances.getTotalRETHSupply();
        if (supply == 0) {
            return 0;
        }
        return 1 ether * rocketNetworkBalances.getTotalETHBalance() / supply;
    }

    /// @notice Submits the current rETH exchange rate to the Scroll cross domain messenger contract
    function submitRate(uint256 _gasLimit) external payable {
        lastRate = rate();
        // Create message payload
        bytes memory message = abi.encodeWithSelector(
            rocketL2ScrollPriceOracle.updateRate.selector,
            lastRate
        );
        // Send the cross chain message
        l1ScrollMessenger.sendMessage{ value: msg.value }(
            address(rocketL2ScrollPriceOracle),
            0,
            message,
            _gasLimit,
            msg.sender
        );
    }
}

pragma solidity >0.5.0 <0.9.0;

// SPDX-License-Identifier: GPL-3.0-only

interface RocketStorageInterface {

    // Deploy status
    function getDeployedStatus() external view returns (bool);

    // Guardian
    function getGuardian() external view returns(address);
    function setGuardian(address _newAddress) external;
    function confirmGuardian() external;

    // Getters
    function getAddress(bytes32 _key) external view returns (address);
    function getUint(bytes32 _key) external view returns (uint);
    function getString(bytes32 _key) external view returns (string memory);
    function getBytes(bytes32 _key) external view returns (bytes memory);
    function getBool(bytes32 _key) external view returns (bool);
    function getInt(bytes32 _key) external view returns (int);
    function getBytes32(bytes32 _key) external view returns (bytes32);

    // Setters
    function setAddress(bytes32 _key, address _value) external;
    function setUint(bytes32 _key, uint _value) external;
    function setString(bytes32 _key, string calldata _value) external;
    function setBytes(bytes32 _key, bytes calldata _value) external;
    function setBool(bytes32 _key, bool _value) external;
    function setInt(bytes32 _key, int _value) external;
    function setBytes32(bytes32 _key, bytes32 _value) external;

    // Deleters
    function deleteAddress(bytes32 _key) external;
    function deleteUint(bytes32 _key) external;
    function deleteString(bytes32 _key) external;
    function deleteBytes(bytes32 _key) external;
    function deleteBool(bytes32 _key) external;
    function deleteInt(bytes32 _key) external;
    function deleteBytes32(bytes32 _key) external;

    // Arithmetic
    function addUint(bytes32 _key, uint256 _amount) external;
    function subUint(bytes32 _key, uint256 _amount) external;

    // Protected storage
    function getNodeWithdrawalAddress(address _nodeAddress) external view returns (address);
    function getNodePendingWithdrawalAddress(address _nodeAddress) external view returns (address);
    function setWithdrawalAddress(address _nodeAddress, address _newWithdrawalAddress, bool _confirm) external;
    function confirmWithdrawalAddress(address _nodeAddress) external;
}

pragma solidity >0.5.0 <0.9.0;

// SPDX-License-Identifier: GPL-3.0-only

interface RocketNetworkBalancesInterface {
    function getBalancesBlock() external view returns (uint256);
    function getLatestReportableBlock() external view returns (uint256);
    function getTotalETHBalance() external view returns (uint256);
    function getStakingETHBalance() external view returns (uint256);
    function getTotalRETHSupply() external view returns (uint256);
    function getETHUtilizationRate() external view returns (uint256);
    function submitBalances(uint256 _block, uint256 _total, uint256 _staking, uint256 _rethSupply) external;
    function executeUpdateBalances(uint256 _block, uint256 _totalEth, uint256 _stakingEth, uint256 _rethSupply) external;
}

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

interface IScrollMessenger {
    /**********
     * Events *
     **********/

    /// @notice Emitted when a cross domain message is sent.
    /// @param sender The address of the sender who initiates the message.
    /// @param target The address of target contract to call.
    /// @param value The amount of value passed to the target contract.
    /// @param messageNonce The nonce of the message.
    /// @param gasLimit The optional gas limit passed to L1 or L2.
    /// @param message The calldata passed to the target contract.
    event SentMessage(
        address indexed sender,
        address indexed target,
        uint256 value,
        uint256 messageNonce,
        uint256 gasLimit,
        bytes message
    );

    /// @notice Emitted when a cross domain message is relayed successfully.
    /// @param messageHash The hash of the message.
    event RelayedMessage(bytes32 indexed messageHash);

    /// @notice Emitted when a cross domain message is failed to relay.
    /// @param messageHash The hash of the message.
    event FailedRelayedMessage(bytes32 indexed messageHash);

    /*************************
     * Public View Functions *
     *************************/

    /// @notice Return the sender of a cross domain message.
    function xDomainMessageSender() external view returns (address);

    /****************************
     * Public Mutated Functions *
     ****************************/

    /// @notice Send cross chain message from L1 to L2 or L2 to L1.
    /// @param target The address of account who recieve the message.
    /// @param value The amount of ether passed when call target contract.
    /// @param message The content of the message.
    /// @param gasLimit Gas limit required to complete the message relay on corresponding chain.
    function sendMessage(
        address target,
        uint256 value,
        bytes calldata message,
        uint256 gasLimit
    ) external payable;

    /// @notice Send cross chain message from L1 to L2 or L2 to L1.
    /// @param target The address of account who receive the message.
    /// @param value The amount of ether passed when call target contract.
    /// @param message The content of the message.
    /// @param gasLimit Gas limit required to complete the message relay on corresponding chain.
    /// @param refundAddress The address of account who will receive the refunded fee.
    function sendMessage(
        address target,
        uint256 value,
        bytes calldata message,
        uint256 gasLimit,
        address refundAddress
    ) external payable;
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.13;

import "./interfaces/scroll/IScrollMessenger.sol";

/// @author Kane Wallmann (Rocket Pool)
/// @notice Receives updates from L1 on the canonical rETH exchange rate
contract RocketScrollPriceOracle {
    // Events
    event RateUpdated(uint256 rate);

    // Immutables
    IScrollMessenger internal immutable scrollMessenger;

    /// @notice The rETH exchange rate in the form of how much ETH 1 rETH is worth
    uint256 public rate;

    /// @notice The timestamp of the block in which the rate was last updated
    uint256 public lastUpdated;

    /// @notice Set to the contract on L1 that has permission to update the rate
    address public owner;

    constructor(address _scrollMessenger) {
        scrollMessenger = IScrollMessenger(_scrollMessenger);
        owner = msg.sender;
    }

    /// @notice Hands ownership to the L1 price messenger contract
    function setOwner(address _newOwner) external {
        require(msg.sender == owner, "Only owner");
        owner = _newOwner;
    }

    /// @notice Called by the messenger contract on L1 to update the exchange rate
    function updateRate(uint256 _newRate) external {
        // Only calls originating from L1 owner can update the rate
        require(
            msg.sender == address(scrollMessenger)
            && scrollMessenger.xDomainMessageSender() == owner,
            "Only owner"
        );
        // Set rate and last updated timestamp
        rate = _newRate;
        lastUpdated = block.timestamp;
        // Emit event
        emit RateUpdated(_newRate);
    }
}

{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 20000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "evmVersion": "shanghai",
  "libraries": {}
}

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[{"inputs":[{"internalType":"contract RocketStorageInterface","name":"_rocketStorage","type":"address"},{"internalType":"contract RocketScrollPriceOracle","name":"_rocketL2ScrollPriceOracle","type":"address"},{"internalType":"contract IScrollMessenger","name":"_l1ScrollMessenger","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"rate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rateStale","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_gasLimit","type":"uint256"}],"name":"submitRate","outputs":[],"stateMutability":"payable","type":"function"}]

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0000000000000000000000001d8f8f00cfa6758d7be78336684788fb0ee0fa4600000000000000000000000030a593876596d347fbba2b5883651b6b1dceccf70000000000000000000000006774bcbd5cecef1336b5300fb5186a12ddd8b367

-----Decoded View---------------
Arg [0] : _rocketStorage (address): 0x1d8f8f00cfa6758d7bE78336684788Fb0ee0Fa46
Arg [1] : _rocketL2ScrollPriceOracle (address): 0x30A593876596d347fbba2b5883651B6B1dcecCf7
Arg [2] : _l1ScrollMessenger (address): 0x6774Bcbd5ceCeF1336b5300fb5186a12DDD8b367

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000001d8f8f00cfa6758d7be78336684788fb0ee0fa46
Arg [1] : 00000000000000000000000030a593876596d347fbba2b5883651b6b1dceccf7
Arg [2] : 0000000000000000000000006774bcbd5cecef1336b5300fb5186a12ddd8b367

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ipfs://53f8a18389e82330ec13ec25c97fa0e6916a5b74b2ec9ed636e660f6eb90b507