[taler-exchange] 29/130: fix lib/ FTBFS

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grothoff pushed a commit to branch master
in repository exchange.

commit 77142acbe800d6f8fe0d8f65374403353ede5d30
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Wed Oct 27 13:42:54 2021 +0200

    fix lib/ FTBFS
---
 src/exchange-tools/taler-auditor-offline.c  |  8 +--
 src/exchange-tools/taler-exchange-offline.c |  8 +--
 src/exchange/taler-exchange-httpd_deposit.c |  4 +-
 src/exchange/taler-exchange-httpd_melt.c    |  4 +-
 src/exchange/taler-exchange-httpd_recoup.c  |  4 +-
 src/include/taler_exchange_service.h        |  5 +-
 src/include/taler_json_lib.h                |  8 +--
 src/json/json_helper.c                      |  8 +--
 src/lib/exchange_api_common.c               | 24 --------
 src/lib/exchange_api_handle.c               |  4 +-
 src/lib/exchange_api_link.c                 |  4 +-
 src/lib/exchange_api_management_get_keys.c  |  4 +-
 src/lib/exchange_api_melt.c                 |  3 +-
 src/lib/exchange_api_refresh_common.c       | 48 +++++++++------
 src/lib/exchange_api_refresh_common.h       | 95 +----------------------------
 src/lib/exchange_api_refreshes_reveal.c     |  5 +-
 16 files changed, 64 insertions(+), 172 deletions(-)

diff --git a/src/exchange-tools/taler-auditor-offline.c 
b/src/exchange-tools/taler-auditor-offline.c
index 8f44aa56..74e17efc 100644
--- a/src/exchange-tools/taler-auditor-offline.c
+++ b/src/exchange-tools/taler-auditor-offline.c
@@ -760,8 +760,8 @@ show_denomkeys (const json_t *denomkeys)
     struct TALER_Amount fee_refund;
     struct TALER_MasterSignatureP master_sig;
     struct GNUNET_JSON_Specification spec[] = {
-      TALER_JSON_spec_denomination_public_key ("denom_pub",
-                                               &denom_pub),
+      TALER_JSON_spec_denom_pub ("denom_pub",
+                                 &denom_pub),
       TALER_JSON_spec_amount ("value",
                               currency,
                               &coin_value),
@@ -1060,8 +1060,8 @@ sign_denomkeys (const json_t *denomkeys)
     struct TALER_Amount fee_refund;
     struct TALER_MasterSignatureP master_sig;
     struct GNUNET_JSON_Specification spec[] = {
-      TALER_JSON_spec_denomination_public_key ("denom_pub",
-                                               &denom_pub),
+      TALER_JSON_spec_denom_pub ("denom_pub",
+                                 &denom_pub),
       TALER_JSON_spec_amount ("value",
                               currency,
                               &coin_value),
diff --git a/src/exchange-tools/taler-exchange-offline.c 
b/src/exchange-tools/taler-exchange-offline.c
index b90e0227..01661eac 100644
--- a/src/exchange-tools/taler-exchange-offline.c
+++ b/src/exchange-tools/taler-exchange-offline.c
@@ -2604,8 +2604,8 @@ show_denomkeys (const struct 
TALER_SecurityModulePublicKeyP *secm_pub,
     struct GNUNET_JSON_Specification spec[] = {
       GNUNET_JSON_spec_string ("section_name",
                                &section_name),
-      TALER_JSON_spec_denomination_public_key ("denom_pub",
-                                               &denom_pub),
+      TALER_JSON_spec_denom_pub ("denom_pub",
+                                 &denom_pub),
       TALER_JSON_spec_amount ("value",
                               currency,
                               &coin_value),
@@ -3023,8 +3023,8 @@ sign_denomkeys (const struct 
TALER_SecurityModulePublicKeyP *secm_pub,
     struct GNUNET_JSON_Specification spec[] = {
       GNUNET_JSON_spec_string ("section_name",
                                &section_name),
-      TALER_JSON_spec_denomination_public_key ("denom_pub",
-                                               &denom_pub),
+      TALER_JSON_spec_denom_pub ("denom_pub",
+                                 &denom_pub),
       TALER_JSON_spec_amount ("value",
                               currency,
                               &coin_value),
diff --git a/src/exchange/taler-exchange-httpd_deposit.c 
b/src/exchange/taler-exchange-httpd_deposit.c
index bff0e6a2..4f7e10e6 100644
--- a/src/exchange/taler-exchange-httpd_deposit.c
+++ b/src/exchange/taler-exchange-httpd_deposit.c
@@ -330,8 +330,8 @@ TEH_handler_deposit (struct MHD_Connection *connection,
                             &deposit.amount_with_fee),
     GNUNET_JSON_spec_fixed_auto ("denom_pub_hash",
                                  &deposit.coin.denom_pub_hash),
-    TALER_JSON_spec_denomination_signature ("ub_sig",
-                                            &deposit.coin.denom_sig),
+    TALER_JSON_spec_denom_sig ("ub_sig",
+                               &deposit.coin.denom_sig),
     GNUNET_JSON_spec_fixed_auto ("merchant_pub",
                                  &deposit.merchant_pub),
     GNUNET_JSON_spec_fixed_auto ("h_contract_terms",
diff --git a/src/exchange/taler-exchange-httpd_melt.c 
b/src/exchange/taler-exchange-httpd_melt.c
index 626f52a6..c33473b4 100644
--- a/src/exchange/taler-exchange-httpd_melt.c
+++ b/src/exchange/taler-exchange-httpd_melt.c
@@ -590,8 +590,8 @@ TEH_handler_melt (struct MHD_Connection *connection,
   enum GNUNET_GenericReturnValue ret;
   MHD_RESULT res;
   struct GNUNET_JSON_Specification spec[] = {
-    TALER_JSON_spec_denomination_signature ("denom_sig",
-                                            
&rmc.refresh_session.coin.denom_sig),
+    TALER_JSON_spec_denom_sig ("denom_sig",
+                               &rmc.refresh_session.coin.denom_sig),
     GNUNET_JSON_spec_fixed_auto ("denom_pub_hash",
                                  &rmc.refresh_session.coin.denom_pub_hash),
     GNUNET_JSON_spec_fixed_auto ("confirm_sig",
diff --git a/src/exchange/taler-exchange-httpd_recoup.c 
b/src/exchange/taler-exchange-httpd_recoup.c
index 3ea394e7..98ab314a 100644
--- a/src/exchange/taler-exchange-httpd_recoup.c
+++ b/src/exchange/taler-exchange-httpd_recoup.c
@@ -523,8 +523,8 @@ TEH_handler_recoup (struct MHD_Connection *connection,
   struct GNUNET_JSON_Specification spec[] = {
     GNUNET_JSON_spec_fixed_auto ("denom_pub_hash",
                                  &coin.denom_pub_hash),
-    TALER_JSON_spec_denomination_signature ("denom_sig",
-                                            &coin.denom_sig),
+    TALER_JSON_spec_denom_sig ("denom_sig",
+                               &coin.denom_sig),
     GNUNET_JSON_spec_fixed_auto ("coin_blind_key_secret",
                                  &coin_bks),
     GNUNET_JSON_spec_fixed_auto ("coin_sig",
diff --git a/src/include/taler_exchange_service.h 
b/src/include/taler_exchange_service.h
index 91395540..72c23325 100644
--- a/src/include/taler_exchange_service.h
+++ b/src/include/taler_exchange_service.h
@@ -1590,8 +1590,6 @@ struct TALER_EXCHANGE_RefreshesRevealHandle;
  * prior to calling this function.
  *
  * @param exchange the exchange handle; the exchange must be ready to operate
- * @param refresh_data_length size of the @a refresh_data (returned
- *        in the `res_size` argument from #TALER_EXCHANGE_refresh_prepare())
  * @param refresh_data the refresh data as returned from
           #TALER_EXCHANGE_refresh_prepare())
  * @param noreveal_index response from the exchange to the
@@ -1605,8 +1603,7 @@ struct TALER_EXCHANGE_RefreshesRevealHandle;
 struct TALER_EXCHANGE_RefreshesRevealHandle *
 TALER_EXCHANGE_refreshes_reveal (
   struct TALER_EXCHANGE_Handle *exchange,
-  size_t refresh_data_length,
-  const char *refresh_data,
+  const json_t *refresh_data,
   uint32_t noreveal_index,
   TALER_EXCHANGE_RefreshesRevealCallback reveal_cb,
   void *reveal_cb_cls);
diff --git a/src/include/taler_json_lib.h b/src/include/taler_json_lib.h
index a4b17297..42c3669d 100644
--- a/src/include/taler_json_lib.h
+++ b/src/include/taler_json_lib.h
@@ -311,8 +311,8 @@ TALER_JSON_spec_relative_time (const char *name,
  * @return corresponding field spec
  */
 struct GNUNET_JSON_Specification
-TALER_JSON_spec_denomination_public_key (const char *field,
-                                         struct TALER_DenominationPublicKey 
*pk);
+TALER_JSON_spec_denom_pub (const char *field,
+                           struct TALER_DenominationPublicKey *pk);
 
 
 /**
@@ -323,8 +323,8 @@ TALER_JSON_spec_denomination_public_key (const char *field,
  * @return corresponding field spec
  */
 struct GNUNET_JSON_Specification
-TALER_JSON_spec_denomination_signature (const char *field,
-                                        struct TALER_DenominationSignature 
*sig);
+TALER_JSON_spec_denom_sig (const char *field,
+                           struct TALER_DenominationSignature *sig);
 
 
 /**
diff --git a/src/json/json_helper.c b/src/json/json_helper.c
index d468b4bc..d509f4ef 100644
--- a/src/json/json_helper.c
+++ b/src/json/json_helper.c
@@ -506,8 +506,8 @@ clean_denom_pub (void *cls,
 
 
 struct GNUNET_JSON_Specification
-TALER_JSON_spec_denomination_public_key (const char *field,
-                                         struct TALER_DenominationPublicKey 
*pk)
+TALER_JSON_spec_denom_pub (const char *field,
+                           struct TALER_DenominationPublicKey *pk)
 {
   struct GNUNET_JSON_Specification ret = {
     .parser = &parse_denom_pub,
@@ -599,8 +599,8 @@ clean_denom_sig (void *cls,
 
 
 struct GNUNET_JSON_Specification
-TALER_JSON_spec_denomination_signature (const char *field,
-                                        struct TALER_DenominationSignature 
*sig)
+TALER_JSON_spec_denom_sig (const char *field,
+                           struct TALER_DenominationSignature *sig)
 {
   struct GNUNET_JSON_Specification ret = {
     .parser = &parse_denom_sig,
diff --git a/src/lib/exchange_api_common.c b/src/lib/exchange_api_common.c
index 1cb11f1b..4da7e33e 100644
--- a/src/lib/exchange_api_common.c
+++ b/src/lib/exchange_api_common.c
@@ -26,22 +26,6 @@
 #include "taler_signatures.h"
 
 
-/**
- * Parse history given in JSON format and return it in binary
- * format.
- *
- * @param exchange connection to the exchange we can use
- * @param history JSON array with the history
- * @param reserve_pub public key of the reserve to inspect
- * @param currency currency we expect the balance to be in
- * @param[out] balance final balance
- * @param history_length number of entries in @a history
- * @param[out] rhistory array of length @a history_length, set to the
- *             parsed history entries
- * @return #GNUNET_OK if history was valid and @a rhistory and @a balance
- *         were set,
- *         #GNUNET_SYSERR if there was a protocol violation in @a history
- */
 enum GNUNET_GenericReturnValue
 TALER_EXCHANGE_parse_reserve_history (
   struct TALER_EXCHANGE_Handle *exchange,
@@ -954,14 +938,6 @@ TALER_EXCHANGE_verify_coin_history (
 }
 
 
-/**
- * Obtain meta data about an exchange (online) signing
- * key.
- *
- * @param keys from where to obtain the meta data
- * @param exchange_pub public key to lookup
- * @return NULL on error (@a exchange_pub not known)
- */
 const struct TALER_EXCHANGE_SigningPublicKey *
 TALER_EXCHANGE_get_signing_key_info (
   const struct TALER_EXCHANGE_Keys *keys,
diff --git a/src/lib/exchange_api_handle.c b/src/lib/exchange_api_handle.c
index b63fa35c..f2f8b594 100644
--- a/src/lib/exchange_api_handle.c
+++ b/src/lib/exchange_api_handle.c
@@ -345,8 +345,8 @@ parse_json_denomkey (struct TALER_EXCHANGE_DenomPublicKey 
*denom_key,
                                 &denom_key->fee_refresh),
     TALER_JSON_spec_amount_any ("fee_refund",
                                 &denom_key->fee_refund),
-    TALER_JSON_spec_denomination_public_key ("denom_pub",
-                                             &denom_key->key),
+    TALER_JSON_spec_denom_pub ("denom_pub",
+                               &denom_key->key),
     GNUNET_JSON_spec_end ()
   };
 
diff --git a/src/lib/exchange_api_link.c b/src/lib/exchange_api_link.c
index e36ffcd9..920224d4 100644
--- a/src/lib/exchange_api_link.c
+++ b/src/lib/exchange_api_link.c
@@ -95,8 +95,8 @@ parse_link_coin (const struct TALER_EXCHANGE_LinkHandle *lh,
   struct TALER_DenominationPublicKey rpub;
   struct TALER_CoinSpendSignatureP link_sig;
   struct GNUNET_JSON_Specification spec[] = {
-    TALER_JSON_spec_denomination_public_key ("denom_pub",
-                                             &rpub),
+    TALER_JSON_spec_denom_pub ("denom_pub",
+                               &rpub),
     GNUNET_JSON_spec_rsa_signature ("ev_sig",
                                     &bsig),
     GNUNET_JSON_spec_fixed_auto ("link_sig",
diff --git a/src/lib/exchange_api_management_get_keys.c 
b/src/lib/exchange_api_management_get_keys.c
index a3e3eccc..98083679 100644
--- a/src/lib/exchange_api_management_get_keys.c
+++ b/src/lib/exchange_api_management_get_keys.c
@@ -179,8 +179,8 @@ handle_ok (struct TALER_EXCHANGE_ManagementGetKeysHandle 
*gh,
                                      &denom_key->expire_deposit),
       TALER_JSON_spec_absolute_time ("stamp_expire_legal",
                                      &denom_key->expire_legal),
-      TALER_JSON_spec_denomination_public_key ("denom_pub",
-                                               &denom_key->key),
+      TALER_JSON_spec_denom_pub ("denom_pub",
+                                 &denom_key->key),
       TALER_JSON_spec_amount_any ("fee_withdraw",
                                   &denom_key->fee_withdraw),
       TALER_JSON_spec_amount_any ("fee_deposit",
diff --git a/src/lib/exchange_api_melt.c b/src/lib/exchange_api_melt.c
index 43117d5c..f3032e8b 100644
--- a/src/lib/exchange_api_melt.c
+++ b/src/lib/exchange_api_melt.c
@@ -471,7 +471,8 @@ TALER_EXCHANGE_melt (struct TALER_EXCHANGE_Handle *exchange,
 
   GNUNET_assert (GNUNET_YES ==
                  TEAH_handle_is_ready (exchange));
-  md = TALER_EXCHANGE_deserialize_melt_data_ (refresh_data);
+  md = TALER_EXCHANGE_deserialize_melt_data_ (refresh_data,
+                                              exchange->key_data.currency);
   if (NULL == md)
   {
     GNUNET_break (0);
diff --git a/src/lib/exchange_api_refresh_common.c 
b/src/lib/exchange_api_refresh_common.c
index 65f36b96..245e5dda 100644
--- a/src/lib/exchange_api_refresh_common.c
+++ b/src/lib/exchange_api_refresh_common.c
@@ -100,11 +100,13 @@ serialize_melted_coin (const struct MeltedCoin *mc)
  * Deserialize information about a coin we are melting.
  *
  * @param[out] mc information to deserialize
+ * @param currency expected currency
  * @param in JSON object to read data from
  * @return #GNUNET_NO to report errors
  */
 static enum GNUNET_GenericReturnValue
 deserialize_melted_coin (struct MeltedCoin *mc,
+                         const char *currency,
                          const json_t *in)
 {
   json_t *trans_privs;
@@ -116,15 +118,18 @@ deserialize_melted_coin (struct MeltedCoin *mc,
     TALER_JSON_spec_denom_pub ("denom_pub",
                                &mc->pub_key),
     TALER_JSON_spec_amount ("melt_amount_with_fee",
+                            currency,
                             &mc->melt_amount_with_fee),
     TALER_JSON_spec_amount ("original_value",
+                            currency,
                             &mc->original_value),
     TALER_JSON_spec_amount ("melt_fee",
-                            &mc->melt_fee),
+                            currency,
+                            &mc->fee_melt),
     TALER_JSON_spec_absolute_time ("expire_deposit",
                                    &mc->expire_deposit),
-    TALER_JSON_spec_json ("transfer_privs",
-                          &trans_privs),
+    GNUNET_JSON_spec_json ("transfer_privs",
+                           &trans_privs),
     GNUNET_JSON_spec_end ()
   };
 
@@ -190,33 +195,35 @@ serialize_melt_data (const struct MeltData *md)
       json_t *ps;
 
       ps = GNUNET_JSON_PACK (
-        GNUNET_JSON_pack_fixed_auto ("ps",
-                                     &md->fresh_coins[i][j]));
+        GNUNET_JSON_pack_data_auto ("ps",
+                                    &md->fresh_coins[i][j]));
       GNUNET_assert (0 ==
                      json_array_append (planchet_secrets,
                                         ps));
     }
     GNUNET_assert (0 ==
                    json_array_append (
+                     fresh_coins,
                      GNUNET_JSON_PACK (
                        TALER_JSON_pack_denom_pub ("denom_pub",
                                                   &md->fresh_pks[i]),
-                       TALER_JSON_pack_array_steal ("planchet_secrets",
-                                                    ps)))
+                       GNUNET_JSON_pack_array_steal ("planchet_secrets",
+                                                     planchet_secrets)))
                    );
   }
   return GNUNET_JSON_PACK (
-    TALER_JSON_pack_array_steal ("fresh_coins",
-                                 fresh_coins),
-    TALER_JSON_pack_object_steal ("melted_coin",
-                                  serialize_melted_coin (&mc->melted_coin)),
-    GNUNET_JSON_pack_fixed_auto ("rc",
-                                 &md->rc));
+    GNUNET_JSON_pack_array_steal ("fresh_coins",
+                                  fresh_coins),
+    GNUNET_JSON_pack_object_steal ("melted_coin",
+                                   serialize_melted_coin (&md->melted_coin)),
+    GNUNET_JSON_pack_data_auto ("rc",
+                                &md->rc));
 }
 
 
 struct MeltData *
-TALER_EXCHANGE_deserialize_melt_data_ (const json_t *melt_data)
+TALER_EXCHANGE_deserialize_melt_data_ (const json_t *melt_data,
+                                       const char *currency)
 {
   struct MeltData *md = GNUNET_new (struct MeltData);
   json_t *fresh_coins;
@@ -250,7 +257,8 @@ TALER_EXCHANGE_deserialize_melt_data_ (const json_t 
*melt_data)
     return NULL;
   }
   if (GNUNET_OK !=
-      deserialize_melted_coin (&md->mc,
+      deserialize_melted_coin (&md->melted_coin,
+                               currency,
                                melted_coin))
   {
     GNUNET_break (0);
@@ -278,8 +286,8 @@ TALER_EXCHANGE_deserialize_melt_data_ (const json_t 
*melt_data)
     };
 
     if (GNUNET_OK !=
-        GNUNET_JSON_parse (melt_data,
-                           spec,
+        GNUNET_JSON_parse (ji,
+                           ispec,
                            NULL, NULL))
     {
       GNUNET_break (0);
@@ -296,8 +304,8 @@ TALER_EXCHANGE_deserialize_melt_data_ (const json_t 
*melt_data)
     for (unsigned int j = 0; j<TALER_CNC_KAPPA; j++)
     {
       struct GNUNET_JSON_Specification jspec[] = {
-        GNUNET_JSON_spec_data_auto ("ps",
-                                    &md->fresh_coins[i][j]),
+        GNUNET_JSON_spec_fixed_auto ("ps",
+                                     &md->fresh_coins[i][j]),
         GNUNET_JSON_spec_end ()
       };
 
@@ -451,5 +459,5 @@ TALER_EXCHANGE_refresh_prepare (
     GNUNET_free (rce[i].new_coins);
   }
   TALER_EXCHANGE_free_melt_data_ (&md);
-  return buf;
+  return ret;
 }
diff --git a/src/lib/exchange_api_refresh_common.h 
b/src/lib/exchange_api_refresh_common.h
index ffef78b0..7b531e70 100644
--- a/src/lib/exchange_api_refresh_common.h
+++ b/src/lib/exchange_api_refresh_common.h
@@ -27,97 +27,6 @@
 #include "taler_signatures.h"
 
 
-/* structures for committing refresh data to disk before doing the
-   network interaction(s) */
-
-GNUNET_NETWORK_STRUCT_BEGIN
-
-/**
- * Header of serialized information about a coin we are melting.
- */
-struct MeltedCoinP
-{
-  /**
-   * Private key of the coin.
-   */
-  struct TALER_CoinSpendPrivateKeyP coin_priv;
-
-  /**
-   * Amount this coin contributes to the melt, including fee.
-   */
-  struct TALER_AmountNBO melt_amount_with_fee;
-
-  /**
-   * The applicable fee for withdrawing a coin of this denomination
-   */
-  struct TALER_AmountNBO fee_melt;
-
-  /**
-   * The original value of the coin.
-   */
-  struct TALER_AmountNBO original_value;
-
-  /**
-   * Transfer private keys for each cut-and-choose dimension.
-   */
-  struct TALER_TransferPrivateKeyP transfer_priv[TALER_CNC_KAPPA];
-
-  /**
-   * Timestamp indicating when coins of this denomination become invalid.
-   */
-  struct GNUNET_TIME_AbsoluteNBO expire_deposit;
-
-  /**
-   * Size of the encoded public key that follows.
-   */
-  uint16_t pbuf_size;
-
-  /**
-   * Size of the encoded signature that follows.
-   */
-  uint16_t sbuf_size;
-
-  /* Followed by serializations of:
-     1) struct TALER_DenominationPublicKey pub_key;
-     2) struct TALER_DenominationSignature sig;
-  */
-};
-
-
-/**
- * Header of serialized data about a melt operation, suitable for
- * persisting it on disk.
- */
-struct MeltDataP
-{
-
-  /**
-   * Hash over the melting session.
-   */
-  struct TALER_RefreshCommitmentP rc;
-
-  /**
-   * Number of coins we are melting, in NBO
-   */
-  uint16_t num_melted_coins GNUNET_PACKED;
-
-  /**
-   * Number of coins we are creating, in NBO
-   */
-  uint16_t num_fresh_coins GNUNET_PACKED;
-
-  /* Followed by serializations of:
-     1) struct MeltedCoinP melted_coins[num_melted_coins];
-     2) struct TALER_EXCHANGE_DenomPublicKey fresh_pks[num_fresh_coins];
-     3) TALER_CNC_KAPPA times:
-        3a) struct TALER_PlanchetSecretsP fresh_coins[num_fresh_coins];
-  */
-};
-
-
-GNUNET_NETWORK_STRUCT_END
-
-
 /**
  * Information about a coin we are melting.
  */
@@ -205,10 +114,12 @@ struct MeltData
  * Deserialize melt data.
  *
  * @param data json data to deserialize
+ * @param currency expected currency for the coins
  * @return deserialized melt data, NULL on error
  */
 struct MeltData *
-TALER_EXCHANGE_deserialize_melt_data_ (const json_t *data);
+TALER_EXCHANGE_deserialize_melt_data_ (const json_t *data,
+                                       const char *currency);
 
 
 /**
diff --git a/src/lib/exchange_api_refreshes_reveal.c 
b/src/lib/exchange_api_refreshes_reveal.c
index 1cb9eada..0af37c02 100644
--- a/src/lib/exchange_api_refreshes_reveal.c
+++ b/src/lib/exchange_api_refreshes_reveal.c
@@ -292,8 +292,7 @@ handle_refresh_reveal_finished (void *cls,
 struct TALER_EXCHANGE_RefreshesRevealHandle *
 TALER_EXCHANGE_refreshes_reveal (
   struct TALER_EXCHANGE_Handle *exchange,
-  size_t refresh_data_length,
-  const char *refresh_data,
+  const json_t *refresh_data,
   uint32_t noreveal_index,
   TALER_EXCHANGE_RefreshesRevealCallback reveal_cb,
   void *reveal_cb_cls)
@@ -326,7 +325,7 @@ TALER_EXCHANGE_refreshes_reveal (
     return NULL;
   }
   md = TALER_EXCHANGE_deserialize_melt_data_ (refresh_data,
-                                              refresh_data_length);
+                                              exchange->key_data.currency);
   if (NULL == md)
   {
     GNUNET_break (0);

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