implementing #4932

src/exchange-tools/taler-exchange-keyup.c

@@ -878,15 +878,18 @@ exchange_keys_update_denomkeys ()
  * Sign @a af with @a priv
  *
  * @param[in|out] af fee structure to sign
+ * @param wireplugin name of the plugin for which we sign
  * @param priv private key to use for signing
  */
 static void
 sign_af (struct TALER_EXCHANGEDB_AggregateFees *af,
+         const char *wireplugin,
          const struct GNUNET_CRYPTO_EddsaPrivateKey *priv)
 {
   struct TALER_MasterWireFeePS wf;
 
-  TALER_EXCHANGEDB_fees_2_wf (af,
+  TALER_EXCHANGEDB_fees_2_wf (wireplugin,
+                              af,
                               &wf);
   GNUNET_assert (GNUNET_OK ==
                  GNUNET_CRYPTO_eddsa_sign (priv,
@@ -980,6 +983,7 @@ create_wire_fee_for_method (void *cls,
     GNUNET_free (amounts);
     GNUNET_free (opt);
     sign_af (af,
+             wiremethod,
              &master_priv.eddsa_priv);
     if (NULL == af_tail)
       af_head = af;
@@ -992,6 +996,7 @@ create_wire_fee_for_method (void *cls,
   if ( (GNUNET_OK == *ret) &&
        (GNUNET_OK !=
         TALER_EXCHANGEDB_fees_write (fn,
+                                     wiremethod,
                                      af_head)) )
     *ret = GNUNET_SYSERR;
   GNUNET_free (section);

src/exchangedb/exchangedb_fees.c

@@ -142,17 +142,22 @@ TALER_EXCHANGEDB_fees_read (const struct GNUNET_CONFIGURATION_Handle *cfg,
 /**
  * Convert @a af to @a wf.
  *
+ * @param wireplugin name of the wire plugin the fees are for
  * @param[in,out] af aggregate fees, host format (updated to round time)
  * @param[out] wf aggregate fees, disk / signature format
  */
 void
-TALER_EXCHANGEDB_fees_2_wf (struct TALER_EXCHANGEDB_AggregateFees *af,
+TALER_EXCHANGEDB_fees_2_wf (const char *wireplugin,
+                            struct TALER_EXCHANGEDB_AggregateFees *af,
                             struct TALER_MasterWireFeePS *wf)
 {
   (void) GNUNET_TIME_round_abs (&af->start_date);
   (void) GNUNET_TIME_round_abs (&af->end_date);
   wf->purpose.size = htonl (sizeof (*wf));
   wf->purpose.purpose = htonl (TALER_SIGNATURE_MASTER_WIRE_FEES);
+  GNUNET_CRYPTO_hash (wireplugin,
+                      strlen (wireplugin) + 1,
+                      &wf->h_wire_method);
   wf->start_date = GNUNET_TIME_absolute_hton (af->start_date);
   wf->end_date = GNUNET_TIME_absolute_hton (af->end_date);
   TALER_amount_hton (&wf->wire_fee,
@@ -164,11 +169,13 @@ TALER_EXCHANGEDB_fees_2_wf (struct TALER_EXCHANGEDB_AggregateFees *af,
  * Write given fee structure to disk.
  *
  * @param filename where to write the fees
+ * @param wireplugin which plugin the fees are about
  * @param af fee structure to write
  * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
  */
 int
 TALER_EXCHANGEDB_fees_write (const char *filename,
+                             const char *wireplugin,
                              struct TALER_EXCHANGEDB_AggregateFees *af)
 {
   struct GNUNET_DISK_FileHandle *fh;
@@ -201,7 +208,8 @@ TALER_EXCHANGEDB_fees_write (const char *filename,
                      GNUNET_DISK_file_close (fh));
       return GNUNET_SYSERR;
     }
-    TALER_EXCHANGEDB_fees_2_wf (af,
+    TALER_EXCHANGEDB_fees_2_wf (wireplugin,
+                                af,
                                 &wd.wf);
     wd.master_sig = af->master_sig;
     af = af->next;

src/exchangedb/test_exchangedb_fees.c

@@ -36,7 +36,8 @@ sign_af (struct TALER_EXCHANGEDB_AggregateFees *af,
 {
   struct TALER_MasterWireFeePS wf;
 
-  TALER_EXCHANGEDB_fees_2_wf (af,
+  TALER_EXCHANGEDB_fees_2_wf ("test",
+                              af,
                               &wf);
   GNUNET_assert (GNUNET_OK ==
                  GNUNET_CRYPTO_eddsa_sign (priv,
@@ -99,6 +100,7 @@ main (int argc,
 
   if (GNUNET_OK !=
       TALER_EXCHANGEDB_fees_write (tmpfile,
+                                   "test",
                                    af))
   {
     GNUNET_break (0);
@@ -121,7 +123,8 @@ main (int argc,
     {
       struct TALER_MasterWireFeePS wf;
 
-      TALER_EXCHANGEDB_fees_2_wf (p,
+      TALER_EXCHANGEDB_fees_2_wf ("test",
+                                  p,
                                   &wf);
       if (GNUNET_OK !=
           GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MASTER_WIRE_FEES,

src/include/taler_exchangedb_lib.h

@@ -345,11 +345,13 @@ TALER_EXCHANGEDB_fees_read (const struct GNUNET_CONFIGURATION_Handle *cfg,
 /**
  * Convert @a af to @a wf.
  *
+ * @param wireplugin name of the wire plugin the fees are for
  * @param[in,out] af aggregate fees, host format (updated to round time)
  * @param[out] wf aggregate fees, disk / signature format
  */
 void
-TALER_EXCHANGEDB_fees_2_wf (struct TALER_EXCHANGEDB_AggregateFees *af,
+TALER_EXCHANGEDB_fees_2_wf (const char *wireplugin,
+                            struct TALER_EXCHANGEDB_AggregateFees *af,
                             struct TALER_MasterWireFeePS *wf);
 
 
@@ -357,11 +359,13 @@ TALER_EXCHANGEDB_fees_2_wf (struct TALER_EXCHANGEDB_AggregateFees *af,
  * Write given fee structure to disk.
  *
  * @param filename where to write the fees
+ * @param wireplugin name of the plugin for which we write the fees
  * @param af fee structure to write
  * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
  */
 int
 TALER_EXCHANGEDB_fees_write (const char *filename,
+                             const char *wireplugin,
                              struct TALER_EXCHANGEDB_AggregateFees *af);
 
 

src/include/taler_signatures.h

@@ -897,6 +897,13 @@ struct TALER_MasterWireFeePS
    */
   struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
 
+  /**
+   * Hash over the wire method (yes, H("test") or H("sepa")), in lower
+   * case, including 0-terminator.  Used to uniquely identify which
+   * wire method these fees apply to.
+   */
+  struct GNUNET_HashCode h_wire_method;
+
   /**
    * Start date when the fee goes into effect.
    */