// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity >=0.4.21 <0.9.0;

/// @title Deprecated - Provided aggregator's the ability to manage function tables,
//  this enables one form of transaction compression.
/// @notice The Nitro aggregator implementation does not use these,
//  so these methods have been stubbed and their effects disabled.
/// They are kept for backwards compatibility.
/// Precompiled contract that exists in every Arbitrum chain at 0x0000000000000000000000000000000000000068.
interface ArbFunctionTable {
    /// @notice Reverts since the table is empty
    function upload(
        bytes calldata buf
    ) external;

    /// @notice Returns the empty table's size, which is 0
    function size(
        address addr
    ) external view returns (uint256);

    /// @notice No-op
    function get(address addr, uint256 index) external view returns (uint256, bool, uint256);
}