// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.19;

import {ITypeAndVersion} from "../shared/interfaces/ITypeAndVersion.sol";

import {OwnerIsCreator} from "./../shared/access/OwnerIsCreator.sol";

/// @notice The ARMProxy serves to allow CCIP contracts
/// to point to a static address for ARM queries, which saves gas
/// since each contract need not store an ARM address in storage. That way
/// we can add ARM queries along many code paths for increased defense in depth
/// with minimal additional cost.
contract ARMProxy is OwnerIsCreator, ITypeAndVersion {
  error ZeroAddressNotAllowed();

  event ARMSet(address arm);

  // STATIC CONFIG
  // solhint-disable-next-line chainlink-solidity/all-caps-constant-storage-variables
  string public constant override typeAndVersion = "ARMProxy 1.0.0";

  // DYNAMIC CONFIG
  address private s_arm;

  constructor(address arm) {
    setARM(arm);
  }

  /// @notice SetARM sets the ARM implementation contract address.
  /// @param arm The address of the arm implementation contract.
  function setARM(address arm) public onlyOwner {
    if (arm == address(0)) revert ZeroAddressNotAllowed();
    s_arm = arm;
    emit ARMSet(arm);
  }

  /// @notice getARM gets the ARM implementation contract address.
  /// @return arm The address of the arm implementation contract.
  function getARM() external view returns (address) {
    return s_arm;
  }

  // We use a fallback function instead of explicit implementations of the functions
  // defined in IARM.sol to preserve compatibility with future additions to the IARM
  // interface. Calling IARM interface methods in ARMProxy should be transparent, i.e.
  // their input/output behaviour should be identical to calling the proxied s_arm
  // contract directly. (If s_arm doesn't point to a contract, we always revert.)
  // solhint-disable-next-line payable-fallback, no-complex-fallback
  fallback() external {
    address arm = s_arm;
    // solhint-disable-next-line no-inline-assembly
    assembly {
      // Revert if no contract present at destination address, otherwise call
      // might succeed unintentionally.
      if iszero(extcodesize(arm)) { revert(0, 0) }
      // We use memory starting at zero, overwriting anything that might already
      // be stored there. This messes with Solidity's expectations around memory
      // layout, but it's fine because we always exit execution of this contract
      // inside this assembly block, i.e. we don't cede control to code generated
      // by the Solidity compiler that might have expectations around memory
      // layout.
      // Copy calldatasize() bytes from calldata offset 0 to memory offset 0.
      calldatacopy(0, 0, calldatasize())
      // Call the underlying ARM implementation. out and outsize are 0 because
      // we don't know the size yet. We hardcode value to zero.
      let success := call(gas(), arm, 0, 0, calldatasize(), 0, 0)
      // Copy the returned data.
      returndatacopy(0, 0, returndatasize())
      // Pass through successful return or revert and associated data.
      if success { return(0, returndatasize()) }
      revert(0, returndatasize())
    }
  }
}

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

interface ITypeAndVersion {
  function typeAndVersion() external pure returns (string memory);
}

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

import {ConfirmedOwner} from "./ConfirmedOwner.sol";

/// @title The OwnerIsCreator contract
/// @notice A contract with helpers for basic contract ownership.
contract OwnerIsCreator is ConfirmedOwner {
  constructor() ConfirmedOwner(msg.sender) {}
}

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

import {ConfirmedOwnerWithProposal} from "./ConfirmedOwnerWithProposal.sol";

/// @title The ConfirmedOwner contract
/// @notice A contract with helpers for basic contract ownership.
contract ConfirmedOwner is ConfirmedOwnerWithProposal {
  constructor(address newOwner) ConfirmedOwnerWithProposal(newOwner, address(0)) {}
}

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

import {IOwnable} from "../interfaces/IOwnable.sol";

/// @title The ConfirmedOwner contract
/// @notice A contract with helpers for basic contract ownership.
contract ConfirmedOwnerWithProposal is IOwnable {
  address private s_owner;
  address private s_pendingOwner;

  event OwnershipTransferRequested(address indexed from, address indexed to);
  event OwnershipTransferred(address indexed from, address indexed to);

  constructor(address newOwner, address pendingOwner) {
    // solhint-disable-next-line gas-custom-errors
    require(newOwner != address(0), "Cannot set owner to zero");

    s_owner = newOwner;
    if (pendingOwner != address(0)) {
      _transferOwnership(pendingOwner);
    }
  }

  /// @notice Allows an owner to begin transferring ownership to a new address.
  function transferOwnership(address to) public override onlyOwner {
    _transferOwnership(to);
  }

  /// @notice Allows an ownership transfer to be completed by the recipient.
  function acceptOwnership() external override {
    // solhint-disable-next-line gas-custom-errors
    require(msg.sender == s_pendingOwner, "Must be proposed owner");

    address oldOwner = s_owner;
    s_owner = msg.sender;
    s_pendingOwner = address(0);

    emit OwnershipTransferred(oldOwner, msg.sender);
  }

  /// @notice Get the current owner
  function owner() public view override returns (address) {
    return s_owner;
  }

  /// @notice validate, transfer ownership, and emit relevant events
  function _transferOwnership(address to) private {
    // solhint-disable-next-line gas-custom-errors
    require(to != msg.sender, "Cannot transfer to self");

    s_pendingOwner = to;

    emit OwnershipTransferRequested(s_owner, to);
  }

  /// @notice validate access
  function _validateOwnership() internal view {
    // solhint-disable-next-line gas-custom-errors
    require(msg.sender == s_owner, "Only callable by owner");
  }

  /// @notice Reverts if called by anyone other than the contract owner.
  modifier onlyOwner() {
    _validateOwnership();
    _;
  }
}

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

interface IOwnable {
  function owner() external returns (address);

  function transferOwnership(address recipient) external;

  function acceptOwnership() external;
}

{
  "remappings": [
    "ds-test/=foundry-lib/forge-std/lib/ds-test/src/",
    "forge-std/=foundry-lib/forge-std/src/",
    "@openzeppelin/=node_modules/@openzeppelin/",
    "@arbitrum/=node_modules/@arbitrum/",
    "hardhat/=node_modules/hardhat/",
    "@eth-optimism/=node_modules/@eth-optimism/",
    "@scroll-tech/=node_modules/@scroll-tech/",
    "@ensdomains/=node_modules/@ensdomains/",
    "@offchainlabs/=node_modules/@offchainlabs/",
    "eth-gas-reporter/=node_modules/eth-gas-reporter/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 26000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

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000000000000000000000000be8fd4b84ca8cc2cfaeeef8dc1388e44860eeeeb

-----Decoded View---------------
Arg [0] : arm (address): 0xbE8FD4b84ca8CC2cFAeeEf8dc1388E44860eeEeb

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000be8fd4b84ca8cc2cfaeeef8dc1388e44860eeeeb