1 files changed, 31 insertions, 0 deletions
diff --git a/tests/helper/trie.go b/tests/helper/trie.go
new file mode 100644
index 000000000..9e666d333
--- /dev/null
+++ b/tests/helper/trie.go
@@ -0,0 +1,31 @@
+package helper
+
+import "github.com/ethereum/go-ethereum/trie"
+
+type MemDatabase struct {
+	db map[string][]byte
+}
+
+func NewMemDatabase() (*MemDatabase, error) {
+	db := &MemDatabase{db: make(map[string][]byte)}
+	return db, nil
+}
+func (db *MemDatabase) Put(key []byte, value []byte) {
+	db.db[string(key)] = value
+}
+func (db *MemDatabase) Get(key []byte) ([]byte, error) {
+	return db.db[string(key)], nil
+}
+func (db *MemDatabase) Delete(key []byte) error {
+	delete(db.db, string(key))
+	return nil
+}
+func (db *MemDatabase) Print()              {}
+func (db *MemDatabase) Close()              {}
+func (db *MemDatabase) LastKnownTD() []byte { return nil }
+
+func NewTrie() *trie.Trie {
+	db, _ := NewMemDatabase()
+
+	return trie.New(nil, db)
+}