// SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

import { ISemver } from "src/universal/ISemver.sol";

/// @custom:proxied
/// @custom:predeploy 0x4200000000000000000000000000000000000015
/// @title L1Block
/// @notice The L1Block predeploy gives users access to information about the last known L1 block.
///         Values within this contract are updated once per epoch (every L1 block) and can only be
///         set by the "depositor" account, a special system address. Depositor account transactions
///         are created by the protocol whenever we move to a new epoch.
contract L1Block is ISemver {
    /// @notice Address of the special depositor account.
    address public constant DEPOSITOR_ACCOUNT = 0xDeaDDEaDDeAdDeAdDEAdDEaddeAddEAdDEAd0001;

    /// @notice The latest L1 block number known by the L2 system.
    uint64 public number;

    /// @notice The latest L1 timestamp known by the L2 system.
    uint64 public timestamp;

    /// @notice The latest L1 base fee.
    uint256 public basefee;

    /// @notice The latest L1 blockhash.
    bytes32 public hash;

    /// @notice The number of L2 blocks in the same epoch.
    uint64 public sequenceNumber;

    /// @notice The scalar value applied to the L1 blob base fee portion of the blob-capable L1 cost func.
    uint32 public blobBaseFeeScalar;

    /// @notice The scalar value applied to the L1 base fee portion of the blob-capable L1 cost func.
    uint32 public baseFeeScalar;

    /// @notice The versioned hash to authenticate the batcher by.
    bytes32 public batcherHash;

    /// @notice The overhead value applied to the L1 portion of the transaction fee.
    /// @custom:legacy
    uint256 public l1FeeOverhead;

    /// @notice The scalar value applied to the L1 portion of the transaction fee.
    /// @custom:legacy
    uint256 public l1FeeScalar;

    /// @notice The latest L1 blob base fee.
    uint256 public blobBaseFee;

    /// @custom:semver 1.2.0
    string public constant version = "1.2.0";

    /// @custom:legacy
    /// @notice Updates the L1 block values.
    /// @param _number         L1 blocknumber.
    /// @param _timestamp      L1 timestamp.
    /// @param _basefee        L1 basefee.
    /// @param _hash           L1 blockhash.
    /// @param _sequenceNumber Number of L2 blocks since epoch start.
    /// @param _batcherHash    Versioned hash to authenticate batcher by.
    /// @param _l1FeeOverhead  L1 fee overhead.
    /// @param _l1FeeScalar    L1 fee scalar.
    function setL1BlockValues(
        uint64 _number,
        uint64 _timestamp,
        uint256 _basefee,
        bytes32 _hash,
        uint64 _sequenceNumber,
        bytes32 _batcherHash,
        uint256 _l1FeeOverhead,
        uint256 _l1FeeScalar
    )
        external
    {
        require(msg.sender == DEPOSITOR_ACCOUNT, "L1Block: only the depositor account can set L1 block values");

        number = _number;
        timestamp = _timestamp;
        basefee = _basefee;
        hash = _hash;
        sequenceNumber = _sequenceNumber;
        batcherHash = _batcherHash;
        l1FeeOverhead = _l1FeeOverhead;
        l1FeeScalar = _l1FeeScalar;
    }

    /// @notice Updates the L1 block values for an Ecotone upgraded chain.
    /// Params are packed and passed in as raw msg.data instead of ABI to reduce calldata size.
    /// Params are expected to be in the following order:
    ///   1. _baseFeeScalar      L1 base fee scalar
    ///   2. _blobBaseFeeScalar  L1 blob base fee scalar
    ///   3. _sequenceNumber     Number of L2 blocks since epoch start.
    ///   4. _timestamp          L1 timestamp.
    ///   5. _number             L1 blocknumber.
    ///   6. _basefee            L1 base fee.
    ///   7. _blobBaseFee        L1 blob base fee.
    ///   8. _hash               L1 blockhash.
    ///   9. _batcherHash        Versioned hash to authenticate batcher by.
    function setL1BlockValuesEcotone() external {
        assembly {
            // Revert if the caller is not the depositor account.
            if xor(caller(), DEPOSITOR_ACCOUNT) {
                mstore(0x00, 0x3cc50b45) // 0x3cc50b45 is the 4-byte selector of "NotDepositor()"
                revert(0x1C, 0x04) // returns the stored 4-byte selector from above
            }
            let data := calldataload(4)
            // sequencenum (uint64), blobBaseFeeScalar (uint32), baseFeeScalar (uint32)
            sstore(sequenceNumber.slot, shr(128, calldataload(4)))
            // number (uint64) and timestamp (uint64)
            sstore(number.slot, shr(128, calldataload(20)))
            sstore(basefee.slot, calldataload(36)) // uint256
            sstore(blobBaseFee.slot, calldataload(68)) // uint256
            sstore(hash.slot, calldataload(100)) // bytes32
            sstore(batcherHash.slot, calldataload(132)) // bytes32
        }
    }
}

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

/// @title ISemver
/// @notice ISemver is a simple contract for ensuring that contracts are
///         versioned using semantic versioning.
interface ISemver {
    /// @notice Getter for the semantic version of the contract. This is not
    ///         meant to be used onchain but instead meant to be used by offchain
    ///         tooling.
    /// @return Semver contract version as a string.
    function version() external view returns (string memory);
}

{
  "remappings": [
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "@rari-capital/solmate/=lib/solmate/",
    "@cwia/=lib/clones-with-immutable-args/src/",
    "forge-std/=lib/forge-std/src/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "safe-contracts/=lib/safe-contracts/contracts/",
    "solady/=lib/solady/src/",
    "@solady-test/=lib/lib-keccak/lib/solady/test/",
    "@solady/=lib/lib-keccak/lib/solady/src/",
    "clones-with-immutable-args/=lib/clones-with-immutable-args/src/",
    "kontrol-cheatcodes/=lib/kontrol-cheatcodes/src/",
    "lib-keccak/=lib/lib-keccak/contracts/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "solmate/=lib/solmate/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "viaIR": false,
  "libraries": {}
}

[{"inputs":[],"name":"DEPOSITOR_ACCOUNT","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseFeeScalar","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"basefee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"batcherHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"blobBaseFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"blobBaseFeeScalar","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"hash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"l1FeeOverhead","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"l1FeeScalar","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"number","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sequenceNumber","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"_number","type":"uint64"},{"internalType":"uint64","name":"_timestamp","type":"uint64"},{"internalType":"uint256","name":"_basefee","type":"uint256"},{"internalType":"bytes32","name":"_hash","type":"bytes32"},{"internalType":"uint64","name":"_sequenceNumber","type":"uint64"},{"internalType":"bytes32","name":"_batcherHash","type":"bytes32"},{"internalType":"uint256","name":"_l1FeeOverhead","type":"uint256"},{"internalType":"uint256","name":"_l1FeeScalar","type":"uint256"}],"name":"setL1BlockValues","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"setL1BlockValuesEcotone","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"timestamp","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"}]

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