eth2.0-specs/fork_choice/safe-block.md

Fork Choice -- Safe Block

Table of contents

• Introduction
• get_safe_beacon_block

Introduction

Under honest majority and certain network synchronicity assumptions there exist a block that is safe from re-orgs. Normally this block is pretty close to the head of canonical chain which makes it valuable to expose a safe block to users.

This section describes an algorithm to find a safe block.

get_safe_beacon_block

def get_safe_beacon_block(store: Store) -> Root:
    # Use most recent justified block as a stopgap
    return store.justified_checkpoint.root

Note: Currently safe block algorithm simply returns store.justified_checkpoint.root and is meant to be improved in the future.