trie: make db insert use size instead of full data

trie/database.go

@@ -314,24 +314,24 @@ func (db *Database) InsertBlob(hash common.Hash, blob []byte) {
 	db.lock.Lock()
 	defer db.lock.Unlock()
 
-	db.insert(hash, blob, rawNode(blob))
+	db.insert(hash, len(blob), rawNode(blob))
 }
 
 // insert inserts a collapsed trie node into the memory database. This method is
 // a more generic version of InsertBlob, supporting both raw blob insertions as
-// well ex trie node insertions. The blob must always be specified to allow proper
+// well ex trie node insertions. The blob size must be specified to allow proper
 // size tracking.
-func (db *Database) insert(hash common.Hash, blob []byte, node node) {
+func (db *Database) insert(hash common.Hash, size int, node node) {
 	// If the node's already cached, skip
 	if _, ok := db.dirties[hash]; ok {
 		return
 	}
-	memcacheDirtyWriteMeter.Mark(int64(len(blob)))
+	memcacheDirtyWriteMeter.Mark(int64(size))
 
 	// Create the cached entry for this node
 	entry := &cachedNode{
 		node:      simplifyNode(node),
-		size:      uint16(len(blob)),
+		size:      uint16(size),
 		flushPrev: db.newest,
 	}
 	for _, child := range entry.childs() {

trie/hasher.go

@@ -184,7 +184,7 @@ func (h *hasher) store(n node, db *Database, force bool) (node, error) {
 		hash := common.BytesToHash(hash)
 
 		db.lock.Lock()
-		db.insert(hash, h.tmp, n)
+		db.insert(hash, len(h.tmp), n)
 		db.lock.Unlock()
 
 		// Track external references from account->storage trie