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consensus/parlia: support recovery when snapshot of parlia gone in disk (#2587)

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buddho 2024-08-08 14:53:51 +08:00 committed by GitHub
parent 2cce9dd3de
commit e988d1574e
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1 changed files with 41 additions and 10 deletions
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47
consensus/parlia/parlia.go
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@ -54,7 +54,7 @@ const (
inMemoryHeaders = 86400 // Number of recent headers to keep in memory for double sign detection,
checkpointInterval = 1024 // Number of blocks after which to save the snapshot to the database
defaultEpochLength = uint64(100) // Default number of blocks of checkpoint to update validatorSet from contract
defaultEpochLength = uint64(200) // Default number of blocks of checkpoint to update validatorSet from contract
defaultTurnLength = uint8(1) // Default consecutive number of blocks a validator receives priority for block production
extraVanity = 32 // Fixed number of extra-data prefix bytes reserved for signer vanity
@ -739,13 +739,28 @@ func (p *Parlia) snapshot(chain consensus.ChainHeaderReader, number uint64, hash
}
}
// If we're at the genesis, snapshot the initial state.
// If we're at the genesis, snapshot the initial state. Alternatively if we have
// piled up more headers than allowed to be reorged (chain reinit from a freezer),
// consider the checkpoint trusted and snapshot it.
// An offset `p.config.Epoch - 1` can ensure getting the right validators.
if number == 0 || ((number+1)%p.config.Epoch == 0 && (len(headers) > int(params.FullImmutabilityThreshold))) {
var (
checkpoint *types.Header
blockHash common.Hash
)
if number == 0 {
checkpoint := chain.GetHeaderByNumber(number)
checkpoint = chain.GetHeaderByNumber(0)
if checkpoint != nil {
// get checkpoint data
hash := checkpoint.Hash()
blockHash = checkpoint.Hash()
}
} else {
checkpoint = chain.GetHeaderByNumber(number + 1 - p.config.Epoch)
blockHeader := chain.GetHeaderByNumber(number)
if blockHeader != nil {
blockHash = blockHeader.Hash()
}
}
if checkpoint != nil && blockHash != (common.Hash{}) {
// get validators from headers
validators, voteAddrs, err := parseValidators(checkpoint, p.chainConfig, p.config)
if err != nil {
@ -753,11 +768,27 @@ func (p *Parlia) snapshot(chain consensus.ChainHeaderReader, number uint64, hash
}
// new snapshot
snap = newSnapshot(p.config, p.signatures, number, hash, validators, voteAddrs, p.ethAPI)
snap = newSnapshot(p.config, p.signatures, number, blockHash, validators, voteAddrs, p.ethAPI)
// get turnLength from headers and use that for new turnLength
turnLength, err := parseTurnLength(checkpoint, p.chainConfig, p.config)
if err != nil {
return nil, err
}
if turnLength != nil {
snap.TurnLength = *turnLength
}
// snap.Recents is currently empty, which affects the following:
// a. The function SignRecently - This is acceptable since an empty snap.Recents results in a more lenient check.
// b. The function blockTimeVerifyForRamanujanFork - This is also acceptable as it won't be invoked during `snap.apply`.
// c. This may cause a mismatch in the slash systemtx, but the transaction list is not verified during `snap.apply`.
// snap.Attestation is nil, but Snapshot.updateAttestation will handle it correctly.
if err := snap.store(p.db); err != nil {
return nil, err
}
log.Info("Stored checkpoint snapshot to disk", "number", number, "hash", hash)
log.Info("Stored checkpoint snapshot to disk", "number", number, "hash", blockHash)
break
}
}