Module launcher 

Custom engine node launcher for Arbitrum.

Extends reth’s standard EngineNodeLauncher by capturing the engine tree sender during orchestrator construction. This sender allows the block producer to inject InsertExecutedBlock directly into reth’s engine tree for persistence via PersistenceService::save_blocks(Full).

This is the reth SDK-native approach: implement LaunchNode with custom orchestrator wiring while reusing all other engine infrastructure.

Structs

ArbEngineLauncher

Arbitrum engine node launcher.

FlushRequest

Flush payload: buffered blocks to persist.

FlushResult

Result from a completed flush.

Enums

PersistenceRequest

Request sent to the background persistence thread.

Functions

compute_parallel_state_root

engine_handle

start_flush

Send blocks to the background persistence thread (non-blocking).

start_unwind

Send an unwind request to the background persistence thread and return a receiver for the result. Blocks from target + 1 onward (and their execution state + trie state) are removed from disk. This runs on the same thread as flushes to avoid races with in-flight persistence.

tree_sender

try_flush_result

Check if a background flush completed (non-blocking).