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-rw-r--r--src/exchange/taler-exchange-httpd_db.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/exchange/taler-exchange-httpd_db.h b/src/exchange/taler-exchange-httpd_db.h
index 60885dbd..5ee3b41d 100644
--- a/src/exchange/taler-exchange-httpd_db.h
+++ b/src/exchange/taler-exchange-httpd_db.h
@@ -47,6 +47,9 @@ TEH_make_coin_known (const struct TALER_CoinPublicInfo *coin,
* insufficient for all transactions associated with the
* coin, return a hard error.
*
+ * We first do a "fast" check using a stored procedure, and
+ * only obtain the "full" data on failure (for performance).
+ *
* @param connection HTTP connection to report hard errors on
* @param coin_pub coin to analyze
* @param coin_value total value of the original coin (by denomination)