-deduplicate

src/exchange/taler-exchange-httpd_batch-withdraw.c

@@ -99,45 +99,6 @@ struct BatchWithdrawContext
 };
 
 
-/**
- * Send reserve history information to client with the
- * message that we have insufficient funds for the
- * requested withdraw operation.
- *
- * @param connection connection to the client
- * @param ebalance expected balance based on our database
- * @param withdraw_amount amount that the client requested to withdraw
- * @param rh reserve history to return
- * @return MHD result code
- */
-static MHD_RESULT
-reply_withdraw_insufficient_funds (
-  struct MHD_Connection *connection,
-  const struct TALER_Amount *ebalance,
-  const struct TALER_Amount *withdraw_amount,
-  const struct TALER_EXCHANGEDB_ReserveHistory *rh)
-{
-  json_t *json_history;
-
-  json_history = TEH_RESPONSE_compile_reserve_history (rh);
-  if (NULL == json_history)
-    return TALER_MHD_reply_with_error (connection,
-                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
-                                       TALER_EC_EXCHANGE_WITHDRAW_HISTORY_ERROR_INSUFFICIENT_FUNDS,
-                                       NULL);
-  return TALER_MHD_REPLY_JSON_PACK (
-    connection,
-    MHD_HTTP_CONFLICT,
-    TALER_JSON_pack_ec (TALER_EC_EXCHANGE_WITHDRAW_INSUFFICIENT_FUNDS),
-    TALER_JSON_pack_amount ("balance",
-                            ebalance),
-    TALER_JSON_pack_amount ("requested_amount",
-                            withdraw_amount),
-    GNUNET_JSON_pack_array_steal ("history",
-                                  json_history));
-}
-
-
 /**
  * Function implementing withdraw transaction.  Runs the
  * transaction logic; IF it returns a non-error code, the transaction
@@ -195,47 +156,11 @@ batch_withdraw_transaction (void *cls,
   }
   if (! balance_ok)
   {
-    /* FIXME: logic shared with normal withdraw
-       => refactor and move to new TEH_responses function! */
-    struct TALER_EXCHANGEDB_ReserveHistory *rh;
-    struct TALER_Amount balance;
-
     TEH_plugin->rollback (TEH_plugin->cls);
-    // FIXME: maybe start read-committed here?
+    *mhd_ret = TEH_RESPONSE_reply_reserve_insufficient_balance (
-    if (GNUNET_OK !=
-        TEH_plugin->start (TEH_plugin->cls,
-                           "get_reserve_history on insufficient balance"))
-    {
-      GNUNET_break (0);
-      if (NULL != mhd_ret)
-        *mhd_ret = TALER_MHD_reply_with_error (connection,
-                                               MHD_HTTP_INTERNAL_SERVER_ERROR,
-                                               TALER_EC_GENERIC_DB_START_FAILED,
-                                               NULL);
-      return GNUNET_DB_STATUS_HARD_ERROR;
-    }
-    /* The reserve does not have the required amount (actual
-     * amount + withdraw fee) */
-    qs = TEH_plugin->get_reserve_history (TEH_plugin->cls,
-                                          wc->reserve_pub,
-                                          &balance,
-                                          &rh);
-    if (NULL == rh)
-    {
-      if (GNUNET_DB_STATUS_HARD_ERROR == qs)
-        *mhd_ret = TALER_MHD_reply_with_error (connection,
-                                               MHD_HTTP_INTERNAL_SERVER_ERROR,
-                                               TALER_EC_GENERIC_DB_FETCH_FAILED,
-                                               "reserve history");
-      return GNUNET_DB_STATUS_HARD_ERROR;
-    }
-    *mhd_ret = reply_withdraw_insufficient_funds (
       connection,
-      &balance,
       &wc->batch_total,
-      rh);
+      wc->reserve_pub);
-    TEH_plugin->free_reserve_history (TEH_plugin->cls,
-                                      rh);
     return GNUNET_DB_STATUS_HARD_ERROR;
   }
 

src/exchange/taler-exchange-httpd_responses.c

@@ -742,4 +742,91 @@ TEH_RESPONSE_compile_reserve_history (
 }
 
 
+/**
+ * Send reserve history information to client with the
+ * message that we have insufficient funds for the
+ * requested withdraw operation.
+ *
+ * @param connection connection to the client
+ * @param ebalance expected balance based on our database
+ * @param withdraw_amount amount that the client requested to withdraw
+ * @param rh reserve history to return
+ * @return MHD result code
+ */
+static MHD_RESULT
+reply_withdraw_insufficient_funds (
+  struct MHD_Connection *connection,
+  const struct TALER_Amount *ebalance,
+  const struct TALER_Amount *withdraw_amount,
+  const struct TALER_EXCHANGEDB_ReserveHistory *rh)
+{
+  json_t *json_history;
+
+  json_history = TEH_RESPONSE_compile_reserve_history (rh);
+  if (NULL == json_history)
+    return TALER_MHD_reply_with_error (connection,
+                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
+                                       TALER_EC_EXCHANGE_WITHDRAW_HISTORY_ERROR_INSUFFICIENT_FUNDS,
+                                       NULL);
+  return TALER_MHD_REPLY_JSON_PACK (
+    connection,
+    MHD_HTTP_CONFLICT,
+    TALER_JSON_pack_ec (TALER_EC_EXCHANGE_WITHDRAW_INSUFFICIENT_FUNDS),
+    TALER_JSON_pack_amount ("balance",
+                            ebalance),
+    TALER_JSON_pack_amount ("requested_amount",
+                            withdraw_amount),
+    GNUNET_JSON_pack_array_steal ("history",
+                                  json_history));
+}
+
+
+MHD_RESULT
+TEH_RESPONSE_reply_reserve_insufficient_balance (
+  struct MHD_Connection *connection,
+  const struct TALER_Amount *balance_required,
+  const struct TALER_ReservePublicKeyP *reserve_pub)
+{
+  struct TALER_EXCHANGEDB_ReserveHistory *rh = NULL;
+  struct TALER_Amount balance;
+  enum GNUNET_DB_QueryStatus qs;
+  MHD_RESULT mhd_ret;
+
+  // FIXME: maybe start read-committed here?
+  if (GNUNET_OK !=
+      TEH_plugin->start (TEH_plugin->cls,
+                         "get_reserve_history on insufficient balance"))
+  {
+    GNUNET_break (0);
+    return TALER_MHD_reply_with_error (connection,
+                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
+                                       TALER_EC_GENERIC_DB_START_FAILED,
+                                       NULL);
+  }
+  /* The reserve does not have the required amount (actual
+   * amount + withdraw fee) */
+  qs = TEH_plugin->get_reserve_history (TEH_plugin->cls,
+                                        reserve_pub,
+                                        &balance,
+                                        &rh);
+  TEH_plugin->rollback (TEH_plugin->cls);
+  if ( (qs < 0) ||
+       (NULL == rh) )
+  {
+    return TALER_MHD_reply_with_error (connection,
+                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
+                                       TALER_EC_GENERIC_DB_FETCH_FAILED,
+                                       "reserve history");
+  }
+  mhd_ret = reply_withdraw_insufficient_funds (
+    connection,
+    &balance,
+    balance_required,
+    rh);
+  TEH_plugin->free_reserve_history (TEH_plugin->cls,
+                                    rh);
+  return mhd_ret;
+}
+
+
 /* end of taler-exchange-httpd_responses.c */

src/exchange/taler-exchange-httpd_responses.h

@@ -58,6 +58,22 @@ TEH_RESPONSE_reply_unknown_denom_pub_hash (
   const struct TALER_DenominationHashP *dph);
 
 
+/**
+ * Return error message indicating that a reserve had
+ * an insufficient balance for the given operation.
+ *
+ * @param connection connection to the client
+ * @param balance_required the balance required for the operation
+ * @param reserve_pub the reserve with insufficient balance
+ * @return MHD result code
+ */
+MHD_RESULT
+TEH_RESPONSE_reply_reserve_insufficient_balance (
+  struct MHD_Connection *connection,
+  const struct TALER_Amount *balance_required,
+  const struct TALER_ReservePublicKeyP *reserve_pub);
+
+
 /**
  * Send assertion that the given denomination key hash
  * is not usable (typically expired) at this time.

src/exchange/taler-exchange-httpd_withdraw.c

@@ -33,45 +33,6 @@
 #include "taler-exchange-httpd_keys.h"
 
 
-/**
- * Send reserve history information to client with the
- * message that we have insufficient funds for the
- * requested withdraw operation.
- *
- * @param connection connection to the client
- * @param ebalance expected balance based on our database
- * @param withdraw_amount amount that the client requested to withdraw
- * @param rh reserve history to return
- * @return MHD result code
- */
-static MHD_RESULT
-reply_withdraw_insufficient_funds (
-  struct MHD_Connection *connection,
-  const struct TALER_Amount *ebalance,
-  const struct TALER_Amount *withdraw_amount,
-  const struct TALER_EXCHANGEDB_ReserveHistory *rh)
-{
-  json_t *json_history;
-
-  json_history = TEH_RESPONSE_compile_reserve_history (rh);
-  if (NULL == json_history)
-    return TALER_MHD_reply_with_error (connection,
-                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
-                                       TALER_EC_EXCHANGE_WITHDRAW_HISTORY_ERROR_INSUFFICIENT_FUNDS,
-                                       NULL);
-  return TALER_MHD_REPLY_JSON_PACK (
-    connection,
-    MHD_HTTP_CONFLICT,
-    TALER_JSON_pack_ec (TALER_EC_EXCHANGE_WITHDRAW_INSUFFICIENT_FUNDS),
-    TALER_JSON_pack_amount ("balance",
-                            ebalance),
-    TALER_JSON_pack_amount ("requested_amount",
-                            withdraw_amount),
-    GNUNET_JSON_pack_array_steal ("history",
-                                  json_history));
-}
-
-
 /**
  * Context for #withdraw_transaction.
  */
@@ -178,48 +139,13 @@ withdraw_transaction (void *cls,
   }
   if (! balance_ok)
   {
-    struct TALER_EXCHANGEDB_ReserveHistory *rh;
-    struct TALER_Amount balance;
-
     TEH_plugin->rollback (TEH_plugin->cls);
-    // FIXME: maybe start read-committed here?
+    *mhd_ret = TEH_RESPONSE_reply_reserve_insufficient_balance (
-    if (GNUNET_OK !=
-        TEH_plugin->start (TEH_plugin->cls,
-                           "get_reserve_history on insufficient balance"))
-    {
-      GNUNET_break (0);
-      if (NULL != mhd_ret)
-        *mhd_ret = TALER_MHD_reply_with_error (connection,
-                                               MHD_HTTP_INTERNAL_SERVER_ERROR,
-                                               TALER_EC_GENERIC_DB_START_FAILED,
-                                               NULL);
-      return GNUNET_DB_STATUS_HARD_ERROR;
-    }
-    /* The reserve does not have the required amount (actual
-     * amount + withdraw fee) */
-    qs = TEH_plugin->get_reserve_history (TEH_plugin->cls,
-                                          &wc->collectable.reserve_pub,
-                                          &balance,
-                                          &rh);
-    if (NULL == rh)
-    {
-      if (GNUNET_DB_STATUS_HARD_ERROR == qs)
-        *mhd_ret = TALER_MHD_reply_with_error (connection,
-                                               MHD_HTTP_INTERNAL_SERVER_ERROR,
-                                               TALER_EC_GENERIC_DB_FETCH_FAILED,
-                                               "reserve history");
-      return GNUNET_DB_STATUS_HARD_ERROR;
-    }
-    *mhd_ret = reply_withdraw_insufficient_funds (
       connection,
-      &balance,
       &wc->collectable.amount_with_fee,
-      rh);
+      &wc->collectable.reserve_pub);
-    TEH_plugin->free_reserve_history (TEH_plugin->cls,
-                                      rh);
     return GNUNET_DB_STATUS_HARD_ERROR;
   }
-
   if ( (TEH_KYC_NONE != TEH_kyc_config.mode) &&
        (! wc->kyc.ok) &&
        (TALER_EXCHANGEDB_KYC_W2W == wc->kyc.type) )