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validation: set BLOCK_ASSUMED_VALID during snapshot load

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Mark the block index entries that are beneath the snapshot base block as
assumed-valid.  Subsequent commits will make use of this flag in other
parts of the system.
This commit is contained in:
James O'Beirne 2021-07-21 14:08:14 -04:00
parent 42b2520db9
commit 01a9b8fe71
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1 changed files with 14 additions and 0 deletions
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14
src/validation.cpp
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@ -5007,11 +5007,25 @@ bool ChainstateManager::PopulateAndValidateSnapshot(
// Fake nChainTx so that GuessVerificationProgress reports accurately
index->nChainTx = index->pprev ? index->pprev->nChainTx + index->nTx : 1;
// Mark unvalidated block index entries beneath the snapshot base block as assumed-valid.
if (!index->IsValid(BLOCK_VALID_SCRIPTS)) {
// This flag will be removed once the block is fully validated by a
// background chainstate.
index->nStatus |= BLOCK_ASSUMED_VALID;
}
// Fake BLOCK_OPT_WITNESS so that CChainState::NeedsRedownload()
// won't ask to rewind the entire assumed-valid chain on startup.
if (index->pprev && DeploymentActiveAt(*index, ::Params().GetConsensus(), Consensus::DEPLOYMENT_SEGWIT)) {
index->nStatus |= BLOCK_OPT_WITNESS;
}
setDirtyBlockIndex.insert(index);
// Changes to the block index will be flushed to disk after this call
// returns in `ActivateSnapshot()`, when `MaybeRebalanceCaches()` is
// called, since we've added a snapshot chainstate and therefore will
// have to downsize the IBD chainstate, which will result in a call to
// `FlushStateToDisk(ALWAYS)`.
}
assert(index);