L2: Replace Sequencer Config Workflow

Apr 24, 2025 by ADMIN 38 views

Context

Currently, our node operators rely on a .toml file to configure their sequencer. However, most production clients, such as geth and reth, use CLI flags for this purpose. This discrepancy in configuration workflows can lead to confusion and make it challenging to manage and maintain our system. In this article, we will outline the steps to replace our current sequencer configuration workflow with a more conventional and widely adopted approach.

Description

The goal of this replacement is to align our sequencer configuration workflow with that of other production clients. This will not only simplify the process but also improve the overall maintainability and scalability of our system.

Step-by-Step Guide

Step 1: Create a `SequencerOptions` Struct

The first step is to create a SequencerOptions struct that mirrors the options present in the sequencer_config_example.toml file. This struct should be a 1-to-1 mapping of the existing options, ensuring consistency with other option structs, such as L2Options and BasedOptions. Every required argument must be required, and every non-required argument must be optional.

// Define the SequencerOptions struct
struct SequencerOptions {
    // Required arguments
    required_arg1: String,
    required_arg2: u64,

    // Optional arguments
    optional_arg1: Option<String>,
    optional_arg2: Option<u64>,
}

Step 2: Extend `L2Options` with `SequencerOptions`

Next, we need to extend the L2Options struct with the SequencerOptions struct. This can be achieved by using the same approach as with the node_opts extension.

// Extend L2Options with SequencerOptions
struct L2Options {
    // Existing options
    existing_opt1: String,
    existing_opt2: u64,

    // New sequencer options
    sequencer_options: SequencerOptions,
}

Step 3: Pass `sequencer_options` to `ethrex_l2::start_l2` and Components

We need to pass the new sequencer_options to the ethrex_l2::start_l2 function and to every component started in it that requires these values.

// Pass sequencer_options to ethrex_l2::start_l2
let sequencer_options = SequencerOptions {
    required_arg1: "value1".to_string(),
    required_arg2: 123u64,
    optional_arg1: Some("value2".to_string()),
    optional_arg2: Some(456u64),
};

let l2_options = L2Options {
    existing_opt1: "existing_value1".to_string(),
    existing_opt2: 789u64,
    sequencer_options,
};

ethrex_l2::start_l2(l2_options);

Step 4: Remove Logic Related to Previous Config Workflow

Finally, we need to remove every logic related to the previous config workflow. This includes any code that reads or writes the .toml file, as well as any functions or methods that rely on the old configuration workflow.

// Remove logic related to previous config workflow
fn remove_old_config_logic()    // Remove code that reads or writes the .toml file
    // Remove functions or methods that rely on the old configuration workflow
}

Frequently Asked Questions

Q: Why do we need to replace the current sequencer configuration workflow?

A: The current workflow relies on a .toml file for node operators to configure their sequencer, which is not a widely adopted approach. Most production clients, such as geth and reth, use CLI flags for this purpose. This discrepancy can lead to confusion and make it challenging to manage and maintain our system.

Q: What are the benefits of replacing the current workflow?

A: By replacing the current workflow, we can align with other production clients, simplify the configuration process, and improve the overall maintainability and scalability of our system.

Q: How do I create a `SequencerOptions` struct that mirrors the options present in the `sequencer_config_example.toml` file?

A: You can create a SequencerOptions struct by defining a struct with the same fields as the options present in the sequencer_config_example.toml file. Every required argument must be required, and every non-required argument must be optional.

// Define the SequencerOptions struct
struct SequencerOptions {
    // Required arguments
    required_arg1: String,
    required_arg2: u64,

    // Optional arguments
    optional_arg1: Option<String>,
    optional_arg2: Option<u64>,
}

Q: How do I extend `L2Options` with `SequencerOptions`?

A: You can extend L2Options with SequencerOptions by adding a new field to the L2Options struct that is an instance of SequencerOptions.

// Extend L2Options with SequencerOptions
struct L2Options {
    // Existing options
    existing_opt1: String,
    existing_opt2: u64,

    // New sequencer options
    sequencer_options: SequencerOptions,
}

Q: How do I pass `sequencer_options` to `ethrex_l2::start_l2` and components?

A: You can pass sequencer_options to ethrex_l2::start_l2 and components by creating an instance of L2Options that includes the sequencer_options field and passing it to the ethrex_l2::start_l2 function.

// Pass sequencer_options to ethrex_l2::start_l2
let sequencer_options = SequencerOptions {
    required_arg1: "value1".to_string(),
    required_arg2: 123u64,
    optional_arg1: Some("value2".to_string()),
    optional_arg2: Some(456u64),
};

let l2_options = L2Options {
    existing_opt1: "existing_value1".to_string(),
    existing_opt2: 789u64,
    sequencer_options,
};

ethrex_l2::start_l2(l2_options);

Q: What happens to the logic related to the previous config workflow?

A: The logic related to the previous config workflow is removed, including any code that reads or writes the .toml file, as well as any functions or methods that rely on the old configuration workflow.

// Remove logic related to previous config workflow
fn remove_old_logic()    // Remove code that reads or writes the .toml file
    // Remove functions or methods that rely on the old configuration workflow
}

Q: What are the next steps after replacing the current workflow?

A: After replacing the current workflow, you can test the new configuration workflow to ensure it is working as expected. You can also review and update any related documentation to reflect the changes.

Q: Who should I contact if I have further questions or concerns?

A: If you have further questions or concerns, you can contact the development team or the project maintainers for assistance.