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finality: dont require chain head to be in the chain (#10054)

This commit is contained in:
Andronik Ordian 2019-01-08 13:14:59 +03:00 committed by Afri Schoedon
parent 696dc05dda
commit ce5f704dd5
1 changed files with 9 additions and 4 deletions
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13
ethcore/src/engines/authority_round/mod.rs
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@ -1422,16 +1422,21 @@ impl Engine<EthereumMachine> for AuthorityRound {
let mut finality_proof: Vec<_> = itertools::repeat_call(move || {
chain(hash).and_then(|header| {
hash = *header.parent_hash();
if header.number() == 0 { return None }
else { return Some(header) }
if header.number() == 0 { None }
else { Some(header) }
})
})
.while_some()
.take_while(|h| h.hash() != *finalized_hash)
.collect();
let finalized_header = chain(*finalized_hash)
.expect("header is finalized; finalized headers must exist in the chain; qed");
let finalized_header = if *finalized_hash == chain_head.hash() {
// chain closure only stores ancestry, but the chain head is also unfinalized.
chain_head.clone()
} else {
chain(*finalized_hash)
.expect("header is finalized; finalized headers must exist in the chain; qed")
};
let signal_number = finalized_header.number();
info!(target: "engine", "Applying validator set change signalled at block {}", signal_number);