diff --git a/src/circuit_cache.h b/src/circuit_cache.h
new file mode 100644
index 0000000..6e9dde5
--- /dev/null
+++ b/src/circuit_cache.h
@@ -0,0 +1,10 @@
+#ifndef CIRCUIT_CACHE_H
+#define CIRCUIT_CACHE_H
+
+#include "provsql_utils.h"
+
+bool circuit_cache_create_gate(pg_uuid_t token, gate_type type, unsigned nb_children, pg_uuid_t *children);
+unsigned circuit_cache_get_children(pg_uuid_t token, pg_uuid_t **children);
+gate_type circuit_cache_get_type(pg_uuid_t token);
+
+#endif /* CIRCUIT_CACHE_H */