make transactions smaller to try to reduce rollbacks

1 files changed, 16 insertions, 0 deletions

diff --git a/src/exchange/taler-exchange-httpd_refresh_melt.c b/src/exchange/taler-exchange-httpd_refresh_melt.c
index 08ceaa86..83bf197e 100644
--- a/src/exchange/taler-exchange-httpd_refresh_melt.c
+++ b/src/exchange/taler-exchange-httpd_refresh_melt.c
@@ -474,6 +474,22 @@ TEH_REFRESH_handler_refresh_melt (struct TEH_RequestHandler *rh,
     goto cleanup;
   }
 
+  /* make sure coin is 'known' in database */
+  {
+    struct TEH_DB_KnowCoinContext kcc;
+    int mhd_ret;
+
+    kcc.coin = &rmc.refresh_session.coin;
+    kcc.connection = connection;
+    if (GNUNET_OK !=
+        TEH_DB_run_transaction (connection,
+                                "know coin for refresh-melt",
+                                &mhd_ret,
+                                &TEH_DB_know_coin_transaction,
+                                &kcc))
+      return mhd_ret;
+  }
+
   res = handle_refresh_melt (connection,
                              &rmc);