-uint64_t tm_get (txn_t *txn, const char *key, uint32_t key_len);
-void tm_set (txn_t *txn, const char *key, uint32_t key_len, uint64_t value);
+uint64_t txn_map_get (txn_t *txn, map_key_t key);
+void txn_map_set (txn_t *txn, map_key_t key, map_val_t value);