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Babe: bad epoch index with skipped epochs and warp sync (#13135)

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* Detect and correct epoch-index for skipped epochs

* Code refactory

* Epoch index should be also be fixed for secondary claims with VRF

* Fix typo

* Make clippy happy

* Fix typo

* Trigger pipeline
This commit is contained in:
Davide Galassi
2023-01-25 12:57:59 +01:00
committed by GitHub
parent fcc1994977
commit e66c53089d
4 changed files with 188 additions and 68 deletions
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substrate/client/consensus/babe/src/verification.rs
+15 -2
View File
@@ -22,6 +22,7 @@ use crate::{
babe_err, find_pre_digest, BlockT, Epoch, Error, LOG_TARGET,
};
use log::{debug, trace};
use sc_consensus_epochs::Epoch as EpochT;
use sc_consensus_slots::CheckedHeader;
use sp_consensus_babe::{
digests::{
@@ -155,10 +156,16 @@ fn check_primary_header<B: BlockT + Sized>(
c: (u64, u64),
) -> Result<(), Error<B>> {
let author = &epoch.authorities[pre_digest.authority_index as usize].0;
let mut epoch_index = epoch.epoch_index;
if epoch.end_slot() <= pre_digest.slot {
// Slot doesn't strictly belong to this epoch, create a clone with fixed values.
epoch_index = epoch.clone_for_slot(pre_digest.slot).epoch_index;
}
if AuthorityPair::verify(&signature, pre_hash, author) {
let (inout, _) = {
let transcript = make_transcript(&epoch.randomness, pre_digest.slot, epoch.epoch_index);
let transcript = make_transcript(&epoch.randomness, pre_digest.slot, epoch_index);
schnorrkel::PublicKey::from_bytes(author.as_slice())
.and_then(|p| {
@@ -228,8 +235,14 @@ fn check_secondary_vrf_header<B: BlockT>(
return Err(Error::InvalidAuthor(expected_author.clone(), author.clone()))
}
let mut epoch_index = epoch.epoch_index;
if epoch.end_slot() <= pre_digest.slot {
// Slot doesn't strictly belong to this epoch, create a clone with fixed values.
epoch_index = epoch.clone_for_slot(pre_digest.slot).epoch_index;
}
if AuthorityPair::verify(&signature, pre_hash.as_ref(), author) {
let transcript = make_transcript(&epoch.randomness, pre_digest.slot, epoch.epoch_index);
let transcript = make_transcript(&epoch.randomness, pre_digest.slot, epoch_index);
schnorrkel::PublicKey::from_bytes(author.as_slice())
.and_then(|p| p.vrf_verify(transcript, &pre_digest.vrf_output, &pre_digest.vrf_proof))