round amounts based on config, do unit test for rounding

1 files changed, 4 insertions, 3 deletions

diff --git a/src/include/taler_amount_lib.h b/src/include/taler_amount_lib.h
index 37f42bd99..7118e2ecf 100644
--- a/src/include/taler_amount_lib.h
+++ b/src/include/taler_amount_lib.h
@@ -310,15 +310,16 @@ TALER_amount2s (const struct TALER_Amount *amount);
 
 
 /**
- * Round the amount to something that can be
- * transferred on the wire.
+ * Round the amount to something that can be transferred on the wire.
  *
  * @param[in,out] amount amount to round down
+ * @param max_fractional_digits number of fractional digits to round down to
  * @return #GNUNET_OK on success, #GNUNET_NO if rounding was unnecessary,
  *         #GNUNET_SYSERR if the amount or currency was invalid
  */
 int
-TALER_amount_round (struct TALER_Amount *amount);
+TALER_amount_round_down (struct TALER_Amount *amount,
+                         uint8_t max_fractional_digits);
 
 
 #if 0                           /* keep Emacsens' auto-indent happy */