fixing triedbmut lookup, added some testing in test.

trie-db/src/lookup.rs

@@ -367,7 +367,6 @@ where
 					NodeOwned::Leaf(slice, value) =>
 						return if partial == *slice {
 							let value = (*value).clone();
-							drop(node);
 							load_value_owned(
 								value,
 								nibble_key.original_data_as_prefix(),
@@ -395,7 +394,6 @@ where
 					NodeOwned::Branch(children, value) =>
 						if partial.is_empty() {
 							return if let Some(value) = value.clone() {
-								drop(node);
 								load_value_owned(
 									value,
 									nibble_key.original_data_as_prefix(),
@@ -433,7 +431,6 @@ where
 
 						if partial.len() == slice.len() {
 							return if let Some(value) = value.clone() {
-								drop(node);
 								load_value_owned(
 									value,
 									nibble_key.original_data_as_prefix(),

trie-db/src/triedbmut.rs

@@ -852,6 +852,7 @@ where
 		handle: &NodeHandle<TrieHash<L>>,
 	) -> Result<Option<DBValue>, TrieHash<L>, CError<L>> {
 		let mut handle = handle;
+		// prefix only use for value node access, so this is always correct.
 		let prefix = (full_key, None);
 		loop {
 			let (mid, child) = match handle {
@@ -871,8 +872,8 @@ where
 				},
 				NodeHandle::InMemory(handle) => match &self.storage[handle] {
 					Node::Empty => return Ok(None),
-					Node::Leaf(key, value) =>
-						if NibbleSlice::from_stored(key) == partial {
+					Node::Leaf(slice, value) =>
+						if NibbleSlice::from_stored(slice) == partial {
 							return Ok(value.in_memory_fetched_value(
 								prefix,
 								self.db,
@@ -923,7 +924,7 @@ where
 								None
 							})
 						} else if partial.starts_with(&slice) {
-							let idx = partial.at(0);
+							let idx = partial.at(slice.len());
 							match children[idx as usize].as_ref() {
 								Some(child) => (1 + slice.len(), child),
 								None => return Ok(None),
@@ -1911,7 +1912,6 @@ where
 				cache_child_values::<L>(&node, &mut values_to_cache, full_key.clone());
 			}
 
-			drop(node);
 			values_to_cache.into_iter().for_each(|(k, v)| cache.cache_value_for_key(&k, v));
 		}
 	}

trie-db/test/src/triedbmut.rs

@@ -99,6 +99,13 @@ fn playpen_internal<T: TrieLayout>() {
 		let mut root = Default::default();
 		let mut memtrie = populate_trie::<T>(&mut memdb, &mut root, &x);
 
+		// avoid duplicate
+		let value_set: std::collections::BTreeMap<&[u8], &[u8]> =
+			x.iter().map(|(k, v)| (k.as_slice(), v.as_slice())).collect();
+		for (k, v) in value_set {
+			assert_eq!(memtrie.get(k).unwrap().unwrap(), v);
+		}
+
 		memtrie.commit();
 		if *memtrie.root() != real {
 			println!("TRIE MISMATCH");
@@ -836,3 +843,50 @@ fn test_insert_remove_data_with_cache_internal<T: TrieLayout>() {
 		assert!(cache.lookup_value_for_key(key).is_none());
 	}
 }
+
+#[test]
+fn test_two_assets_memory_db() {
+	test_two_assets_memory_db_inner_1::<HashedValueNoExtThreshold<1>>();
+	test_two_assets_memory_db_inner_2::<HashedValueNoExtThreshold<1>>();
+}
+fn test_two_assets_memory_db_inner_1<T: TrieLayout>() {
+	let mut memdb = PrefixedMemoryDB::<T>::new(&[0u8]);
+	let mut root = Default::default();
+	let mut state = TrieDBMutBuilder::<T>::new(&mut memdb, &mut root).build();
+
+	let key1 = [1u8; 3];
+	let data1 = [1u8; 2];
+	state.insert(key1.as_ref(), &data1).unwrap();
+	assert_eq!(state.get(key1.as_ref()).unwrap().unwrap(), data1); //PASSING
+	let key2 = [2u8; 3];
+	let data2 = [2u8; 2];
+	state.insert(key2.as_ref(), &data2).unwrap();
+	assert_eq!(state.get(key1.as_ref()).unwrap().unwrap(), data1);
+
+	state.commit();
+}
+
+fn test_two_assets_memory_db_inner_2<T: TrieLayout>() {
+	let mut memdb = PrefixedMemoryDB::<T>::new(&[0u8]);
+	let mut root = Default::default();
+	let mut state = TrieDBMutBuilder::<T>::new(&mut memdb, &mut root).build();
+
+	let key1 = [1u8];
+	let data1 = [1u8; 2];
+	state.insert(key1.as_ref(), &data1).unwrap();
+	assert_eq!(state.get(key1.as_ref()).unwrap().unwrap(), data1);
+	let key2 = [1u8, 2];
+	let data2 = [2u8; 2];
+	state.insert(key2.as_ref(), &data2).unwrap();
+	assert_eq!(state.get(key1.as_ref()).unwrap().unwrap(), data1);
+	assert_eq!(state.get(key2.as_ref()).unwrap().unwrap(), data2);
+
+	state.commit();
+
+	let key3 = [1u8, 3];
+	let data3 = [3u8; 2];
+	state.insert(key3.as_ref(), &data3).unwrap();
+	assert_eq!(state.get(key1.as_ref()).unwrap().unwrap(), data1);
+	assert_eq!(state.get(key2.as_ref()).unwrap().unwrap(), data2);
+	assert_eq!(state.get(key3.as_ref()).unwrap().unwrap(), data3);
+}