feat(l1)!: allow setting a target gas limit through CLI

[MegaRedHand]

Motivation

When spinning up localnets made up only of ethrex nodes, we can't use gas limits apart from the default one of 30M. We want to be able to set it through a CLI flag in those cases.

Description

This PR adds a flag for setting the gas limit: --builder.gas-limit. It also renames the flag --block-producer.extra-data to --builder.extra-data.

Closes #4482

[Copilot]

Pull Request Overview

This PR adds CLI support for configuring the target gas limit in block production, addressing the limitation where localnets with only ethrex nodes were restricted to the default 30M gas limit.

• Adds a new --block-producer.gas-limit CLI flag to allow custom gas limit configuration
• Refactors init_rpc_api to accept gas limit and extra data from the main options object instead of as separate parameters
• Updates lint annotation from allow to expect for the too_many_arguments clippy warning

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
cmd/ethrex/cli.rs	Adds new gas_limit CLI option field with appropriate flag configuration and default value
cmd/ethrex/initializers.rs	Refactors function signature to use options object for gas limit and extra data, removes hardcoded None value

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[github-actions]

Lines of code report

Total lines added: 9
Total lines removed: 5
Total lines changed: 14

Detailed view

+-------------------------------------+-------+------+
| File                                | Lines | Diff |
+-------------------------------------+-------+------+
| ethrex/cmd/ethrex/cli.rs            | 579   | +9   |
+-------------------------------------+-------+------+
| ethrex/cmd/ethrex/initializers.rs   | 462   | -4   |
+-------------------------------------+-------+------+
| ethrex/crates/networking/rpc/rpc.rs | 811   | -1   |
+-------------------------------------+-------+------+

[mpaulucci]

I don't understand this? Isn't the default gas ceil different depending on the fork? I understand if you want to overwrite it but, isnt the default different for each fork?

[MegaRedHand]

No. The default gas limit is set by each client independently of the network. For example, geth currently has a default of 60M:

https://github.com/ethereum/go-ethereum/blob/6608a2aafd3603afe59f95fa7b2a8ec00b8eaa19/miner/miner.go#L54-L55

I think we should bump this default to 60M, but I didn't change that in this PR since it's important enough to merit its own PR and discussion.

[ilitteri]

:agite: