core, ethdb, trie: mode dirty data to clean cache on flush (#19307)

This PR is a more advanced form of the dirty-to-clean cacher (#18995),
where we reuse previous database write batches as datasets to uncache,
saving a dirty-trie-iteration and a dirty-trie-rlp-reencoding per block.

core/blockchain.go

@@ -301,7 +301,7 @@ func (bc *BlockChain) SetHead(head uint64) error {
 	defer bc.chainmu.Unlock()
 
 	// Rewind the header chain, deleting all block bodies until then
-	delFn := func(db ethdb.Deleter, hash common.Hash, num uint64) {
+	delFn := func(db ethdb.Writer, hash common.Hash, num uint64) {
 		rawdb.DeleteBody(db, hash, num)
 	}
 	bc.hc.SetHead(head, delFn)

core/headerchain.go

@@ -455,7 +455,7 @@ func (hc *HeaderChain) SetCurrentHeader(head *types.Header) {
 
 // DeleteCallback is a callback function that is called by SetHead before
 // each header is deleted.
-type DeleteCallback func(ethdb.Deleter, common.Hash, uint64)
+type DeleteCallback func(ethdb.Writer, common.Hash, uint64)
 
 // SetHead rewinds the local chain to a new head. Everything above the new head
 // will be deleted and the new one set.

core/rawdb/accessors_chain.go

@@ -45,7 +45,7 @@ func WriteCanonicalHash(db ethdb.Writer, hash common.Hash, number uint64) {
 }
 
 // DeleteCanonicalHash removes the number to hash canonical mapping.
-func DeleteCanonicalHash(db ethdb.Deleter, number uint64) {
+func DeleteCanonicalHash(db ethdb.Writer, number uint64) {
 	if err := db.Delete(headerHashKey(number)); err != nil {
 		log.Crit("Failed to delete number to hash mapping", "err", err)
 	}
@@ -180,7 +180,7 @@ func WriteHeader(db ethdb.Writer, header *types.Header) {
 }
 
 // DeleteHeader removes all block header data associated with a hash.
-func DeleteHeader(db ethdb.Deleter, hash common.Hash, number uint64) {
+func DeleteHeader(db ethdb.Writer, hash common.Hash, number uint64) {
 	deleteHeaderWithoutNumber(db, hash, number)
 	if err := db.Delete(headerNumberKey(hash)); err != nil {
 		log.Crit("Failed to delete hash to number mapping", "err", err)
@@ -189,7 +189,7 @@ func DeleteHeader(db ethdb.Deleter, hash common.Hash, number uint64) {
 
 // deleteHeaderWithoutNumber removes only the block header but does not remove
 // the hash to number mapping.
-func deleteHeaderWithoutNumber(db ethdb.Deleter, hash common.Hash, number uint64) {
+func deleteHeaderWithoutNumber(db ethdb.Writer, hash common.Hash, number uint64) {
 	if err := db.Delete(headerKey(number, hash)); err != nil {
 		log.Crit("Failed to delete header", "err", err)
 	}
@@ -240,7 +240,7 @@ func WriteBody(db ethdb.Writer, hash common.Hash, number uint64, body *types.Bod
 }
 
 // DeleteBody removes all block body data associated with a hash.
-func DeleteBody(db ethdb.Deleter, hash common.Hash, number uint64) {
+func DeleteBody(db ethdb.Writer, hash common.Hash, number uint64) {
 	if err := db.Delete(blockBodyKey(number, hash)); err != nil {
 		log.Crit("Failed to delete block body", "err", err)
 	}
@@ -278,7 +278,7 @@ func WriteTd(db ethdb.Writer, hash common.Hash, number uint64, td *big.Int) {
 }
 
 // DeleteTd removes all block total difficulty data associated with a hash.
-func DeleteTd(db ethdb.Deleter, hash common.Hash, number uint64) {
+func DeleteTd(db ethdb.Writer, hash common.Hash, number uint64) {
 	if err := db.Delete(headerTDKey(number, hash)); err != nil {
 		log.Crit("Failed to delete block total difficulty", "err", err)
 	}
@@ -347,7 +347,7 @@ func WriteReceipts(db ethdb.Writer, hash common.Hash, number uint64, receipts ty
 }
 
 // DeleteReceipts removes all receipt data associated with a block hash.
-func DeleteReceipts(db ethdb.Deleter, hash common.Hash, number uint64) {
+func DeleteReceipts(db ethdb.Writer, hash common.Hash, number uint64) {
 	if err := db.Delete(blockReceiptsKey(number, hash)); err != nil {
 		log.Crit("Failed to delete block receipts", "err", err)
 	}
@@ -378,7 +378,7 @@ func WriteBlock(db ethdb.Writer, block *types.Block) {
 }
 
 // DeleteBlock removes all block data associated with a hash.
-func DeleteBlock(db ethdb.Deleter, hash common.Hash, number uint64) {
+func DeleteBlock(db ethdb.Writer, hash common.Hash, number uint64) {
 	DeleteReceipts(db, hash, number)
 	DeleteHeader(db, hash, number)
 	DeleteBody(db, hash, number)
@@ -387,7 +387,7 @@ func DeleteBlock(db ethdb.Deleter, hash common.Hash, number uint64) {
 
 // deleteBlockWithoutNumber removes all block data associated with a hash, except
 // the hash to number mapping.
-func deleteBlockWithoutNumber(db ethdb.Deleter, hash common.Hash, number uint64) {
+func deleteBlockWithoutNumber(db ethdb.Writer, hash common.Hash, number uint64) {
 	DeleteReceipts(db, hash, number)
 	deleteHeaderWithoutNumber(db, hash, number)
 	DeleteBody(db, hash, number)

core/rawdb/accessors_indexes.go

@@ -54,7 +54,7 @@ func WriteTxLookupEntries(db ethdb.Writer, block *types.Block) {
 }
 
 // DeleteTxLookupEntry removes all transaction data associated with a hash.
-func DeleteTxLookupEntry(db ethdb.Deleter, hash common.Hash) {
+func DeleteTxLookupEntry(db ethdb.Writer, hash common.Hash) {
 	db.Delete(txLookupKey(hash))
 }
 

core/rawdb/table.go

@@ -148,3 +148,8 @@ func (b *tableBatch) Write() error {
 func (b *tableBatch) Reset() {
 	b.batch.Reset()
 }
+
+// Replay replays the batch contents.
+func (b *tableBatch) Replay(w ethdb.Writer) error {
+	return b.batch.Replay(w)
+}

core/state/statedb.go

@@ -53,6 +53,10 @@ func (n *proofList) Put(key []byte, value []byte) error {
 	return nil
 }
 
+func (n *proofList) Delete(key []byte) error {
+	panic("not supported")
+}
+
 // StateDBs within the ethereum protocol are used to store anything
 // within the merkle trie. StateDBs take care of caching and storing
 // nested states. It's the general query interface to retrieve: