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-rw-r--r--tests/concepts/libs/trie_database.nim12
1 files changed, 12 insertions, 0 deletions
diff --git a/tests/concepts/libs/trie_database.nim b/tests/concepts/libs/trie_database.nim
new file mode 100644
index 000000000..a45c64842
--- /dev/null
+++ b/tests/concepts/libs/trie_database.nim
@@ -0,0 +1,12 @@
+type
+  KeccakHash* = object
+    data*: string
+
+  BytesRange* = object
+    bytes*: string
+
+  TrieDatabase* = concept db
+    put(var db, KeccakHash, string) is bool
+    del(var db, KeccakHash) is bool
+    get(db, KeccakHash) is string
+