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core: reset tx lookup cache if necessary #1902

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Jan 31, 2024
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core: reset tx lookup cache if necessary #1902

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17 changes: 14 additions & 3 deletions core/blockchain.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2088,6 +2088,12 @@ func (bc *BlockChain) reorg(oldBlock, newBlock *types.Block) error {
} else {
log.Error("Impossible reorg, please file an issue", "oldnum", oldBlock.Number(), "oldhash", oldBlock.Hash(), "newnum", newBlock.Number(), "newhash", newBlock.Hash())
}
// Reset the tx lookup cache in case to clear stale txlookups.
// This is done before writing any new chain data to avoid the
// weird scenario that canonical chain is changed while the
// stale lookups are still cached.
bc.txLookupCache.Purge()

// Insert the new chain(except the head block(reverse order)),
// taking care of the proper incremental order.
for i := len(newChain) - 1; i >= 1; i-- {
Expand All @@ -2102,11 +2108,16 @@ func (bc *BlockChain) reorg(oldBlock, newBlock *types.Block) error {

// Delete useless indexes right now which includes the non-canonical
// transaction indexes, canonical chain indexes which above the head.
indexesBatch := bc.db.NewBatch()
for _, tx := range types.HashDifference(deletedTxs, addedTxs) {
var (
indexesBatch = bc.db.NewBatch()
diffs = types.HashDifference(deletedTxs, addedTxs)
)
for _, tx := range diffs {
rawdb.DeleteTxLookupEntry(indexesBatch, tx)
}
// Delete any canonical number assignments above the new head
// Delete all hash markers that are not part of the new canonical chain.
// Because the reorg function does not handle new chain head, all hash
// markers greater than or equal to new chain head should be deleted.
number := commonBlock.NumberU64()
if len(newChain) > 1 {
number = newChain[1].NumberU64()
Expand Down