Add `assert_integrity` at service level in txpool

Description

This issue does not include a description.

Contributor guide

Tech stack

rust

Domain

backend

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-3 hours

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

fresh

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

needs investigation

Prerequisites

Rust programmingUnderstanding of txpool module

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

40

Research direction

Examine the txpool service implementation in fuel core. Look for existing integrity checks and determine where `assert integrity` should be called. The issue lacks details, so initial exploration of the codebase and possibly issue discussions is needed to clarify the expected behavior.