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.

1 files changed, 14 insertions, 0 deletions

diff --git a/light/nodeset.go b/light/nodeset.go
index 3b556108a..a8bf4f6c6 100644
--- a/light/nodeset.go
+++ b/light/nodeset.go
@@ -60,6 +60,15 @@ func (db *NodeSet) Put(key []byte, value []byte) error {
 	return nil
 }
 
+// Delete removes a node from the set
+func (db *NodeSet) Delete(key []byte) error {
+	db.lock.Lock()
+	defer db.lock.Unlock()
+
+	delete(db.nodes, string(key))
+	return nil
+}
+
 // Get returns a stored node
 func (db *NodeSet) Get(key []byte) ([]byte, error) {
 	db.lock.RLock()
@@ -138,6 +147,11 @@ func (n *NodeList) Put(key []byte, value []byte) error {
 	return nil
 }
 
+// Delete panics as there's no reason to remove a node from the list.
+func (n *NodeList) Delete(key []byte) error {
+	panic("not supported")
+}
+
 // DataSize returns the aggregated data size of nodes in the list
 func (n NodeList) DataSize() int {
 	var size int