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eth2.0-specs
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rearrange fork choice condition for clarity

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Danny Ryan 2020-06-10 09:40:34 -05:00 committed by GitHub
parent 479c40450d
commit 1dc6b55617
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1 changed files with 9 additions and 7 deletions
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specs/phase0/fork-choice.md
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@ -372,15 +372,17 @@ def on_block(store: Store, signed_block: SignedBeaconBlock) -> None:
if state.finalized_checkpoint.epoch > store.finalized_checkpoint.epoch:
store.finalized_checkpoint = state.finalized_checkpoint
# Potentially update justified if different from store
if store.justified_checkpoint != state.current_justified_checkpoint:
finalized_slot = compute_start_slot_at_epoch(store.finalized_checkpoint.epoch)
# Update justified if new justified is later than store justified
# or if store justified is not in chain with finalized checkpoint
if (
state.current_justified_checkpoint.epoch > store.justified_checkpoint.epoch
or get_ancestor(
store, store.justified_checkpoint.root, finalized_slot) != store.finalized_checkpoint.root
):
if state.current_justified_checkpoint.epoch > store.justified_checkpoint.epoch:
store.justified_checkpoint = state.current_justified_checkpoint
return
# Update justified if store justified is not in chain with finalized checkpoint
finalized_slot = compute_start_slot_at_epoch(store.finalized_checkpoint.epoch)
ancestor_at_finalized_slot = get_ancestor(store, store.justified_checkpoint.root, finalized_slot)
if ancestor_at_finalized_slot != store.finalized_checkpoint.root:
store.justified_checkpoint = state.current_justified_checkpoint
```