-work on reserve_open DB API

src/exchange/taler-exchange-httpd_reserves_open.c

@@ -102,6 +102,12 @@ struct ReserveOpenContext
    * Desired minimum purse limit.
    */
   uint32_t purse_limit;
+
+  /**
+   * Set to true if the reserve balance is too low
+   * for the operation.
+   */
+  bool no_funds;
 };
 
 
@@ -223,12 +229,14 @@ reserve_open_transaction (void *cls,
                                     /* inputs */
                                     rsc->reserve_pub,
                                     &rsc->total,
+                                    &rsc->reserve_payment,
                                     rsc->purse_limit,
                                     &rsc->reserve_sig,
                                     rsc->desired_expiration,
                                     rsc->timestamp,
                                     &rsc->gf->fees.account,
                                     /* outputs */
+                                    &rsc->no_funds,
                                     &rsc->open_cost,
                                     &rsc->reserve_expiration);
   switch (qs)
@@ -253,6 +261,15 @@ reserve_open_transaction (void *cls,
   case GNUNET_DB_STATUS_SUCCESS_ONE_RESULT:
     break;
   }
+  if (rsc->no_funds)
+  {
+    *mhd_ret
+      = TEH_RESPONSE_reply_reserve_insufficient_balance (
+          connection,
+          &rsc->reserve_payment,
+          rsc->reserve_pub);
+    return GNUNET_DB_STATUS_HARD_ERROR;
+  }
   return qs;
 }
 
@@ -342,13 +359,10 @@ TEH_handler_reserves_open (struct TEH_RequestContext *rc,
       cleanup_rsc (&rsc);
       return MHD_YES;   /* failure */
     }
-    /* FIXME-DOLD: Alternatively, we could here add coin->amount_minus_fee and
-       thereby charge the deposit fee even when paying the reserve-open fee.
-       To be decided... */
     if (0 >
         TALER_amount_add (&rsc.total,
                           &rsc.total,
-                          &coin->amount))
+                          &coin->amount_minus_fee))
     {
       GNUNET_break (0);
       cleanup_rsc (&rsc);

src/exchangedb/pg_do_reserve_open.c

@@ -31,11 +31,13 @@ TEH_PG_do_reserve_open (
   void *cls,
   const struct TALER_ReservePublicKeyP *reserve_pub,
   const struct TALER_Amount *total_paid,
+  const struct TALER_Amount *reserve_payment,
   uint32_t min_purse_limit,
   const struct TALER_ReserveSignatureP *reserve_sig,
   struct GNUNET_TIME_Timestamp desired_expiration,
   struct GNUNET_TIME_Timestamp now,
   const struct TALER_Amount *open_fee,
+  bool *no_funds,
   struct TALER_Amount *open_cost,
   struct GNUNET_TIME_Timestamp *final_expiration)
 {
@@ -43,6 +45,7 @@ TEH_PG_do_reserve_open (
   struct GNUNET_PQ_QueryParam params[] = {
     GNUNET_PQ_query_param_auto_from_type (reserve_pub),
     TALER_PQ_query_param_amount (total_paid),
+    TALER_PQ_query_param_amount (reserve_payment),
     GNUNET_PQ_query_param_uint32 (&min_purse_limit),
     GNUNET_PQ_query_param_auto_from_type (reserve_sig),
     GNUNET_PQ_query_param_timestamp (&desired_expiration),
@@ -51,9 +54,11 @@ TEH_PG_do_reserve_open (
     GNUNET_PQ_query_param_end
   };
   struct GNUNET_PQ_ResultSpec rs[] = {
-    TALER_PQ_RESULT_SPEC_AMOUNT ("open_cost",
+    GNUNET_PQ_result_spec_bool ("out_no_funds",
+                                no_funds),
+    TALER_PQ_RESULT_SPEC_AMOUNT ("out_open_cost",
                                  open_cost),
-    GNUNET_PQ_result_spec_timestamp ("final_expiration",
+    GNUNET_PQ_result_spec_timestamp ("out_final_expiration",
                                      final_expiration),
     GNUNET_PQ_result_spec_end
   };
@@ -61,11 +66,12 @@ TEH_PG_do_reserve_open (
   PREPARE (pg,
            "do_reserve_open",
            "SELECT "
-           " open_cost_val"
+           " out_open_cost_val"
-           ",open_cost_frac"
+           ",out_open_cost_frac"
-           ",final_expiration"
+           ",out_final_expiration"
+           ",out_no_funds"
            " FROM exchange_do_reserve_open"
-           " ($1,$2,$3,$4,$5,$6,$7,$8,$9);");
+           " ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11);");
   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
                                                    "do_reserve_open",
                                                    params,

src/exchangedb/pg_do_reserve_open.h

@@ -27,15 +27,20 @@
 
 
 /**
- * Insert reserve close operation into database.
+ * Perform reserve open operation on database.
  *
  * @param cls closure
  * @param reserve_pub which reserve is this about?
- * @param execution_date when did we perform the transfer?
+ * @param total_paid total amount paid (coins and reserve)
- * @param receiver_account to which account do we transfer, in payto://-format
+ * @param reserve_payment amount to be paid from the reserve
- * @param wtid identifier for the wire transfer
+ * @param min_purse_limit minimum number of purses we should be able to open
- * @param amount_with_fee amount we charged to the reserve
+ * @param reserve_sig signature by the reserve for the operation
- * @param closing_fee how high is the closing fee
+ * @param desired_expiration when should the reserve expire (earliest time)
+ * @param now when did we the client initiate the action
+ * @param open_fee annual fee to be charged for the open operation by the exchange
+ * @param[out] no_funds set to true if reserve balance is insufficient
+ * @param[out] open_cost set to the actual cost
+ * @param[out] final_expiration when will the reserve expire now
  * @return transaction status code
  */
 enum GNUNET_DB_QueryStatus
@@ -43,11 +48,13 @@ TEH_PG_do_reserve_open (
   void *cls,
   const struct TALER_ReservePublicKeyP *reserve_pub,
   const struct TALER_Amount *total_paid,
+  const struct TALER_Amount *reserve_payment,
   uint32_t min_purse_limit,
   const struct TALER_ReserveSignatureP *reserve_sig,
   struct GNUNET_TIME_Timestamp desired_expiration,
   struct GNUNET_TIME_Timestamp now,
   const struct TALER_Amount *open_fee,
+  bool *no_funds,
   struct TALER_Amount *open_cost,
   struct GNUNET_TIME_Timestamp *final_expiration);
 

src/exchangedb/plugin_exchangedb_postgres.c

@@ -17296,6 +17296,8 @@ libtaler_plugin_exchangedb_postgres_init (void *cls)
   plugin->select_merge_amounts_for_kyc_check
     = &postgres_select_merge_amounts_for_kyc_check;
   /* NEW style, sort alphabetically! */
+  plugin->insert_reserve_open_deposit
+    = &TEH_PG_insert_reserve_open_deposit;
   plugin->insert_close_request
     = &TEH_PG_insert_close_request;
   plugin->iterate_reserve_close_info

src/exchangedb/procedures.sql

@@ -2175,4 +2175,30 @@ out_insufficient_funds=FALSE;
 
 END $$;
 
+
+CREATE OR REPLACE FUNCTION exchange_do_reserve_open(
+  IN in_reserve_pub BYTEA,
+  IN in_total_paid_val INT8,
+  IN in_total_paid_frac INT4,
+  IN in_reserve_payment_val INT8,
+  IN in_reserve_payment_frac INT4,
+  IN in_min_purse_limit INT4,
+  IN in_reserve_sig BYTEA,
+  IN in_desired_expiration INT8,
+  IN in_now INT8,
+  IN in_open_fee_val INT8,
+  IN in_open_fee_frac INT4,
+  OUT out_open_cost_val INT8,
+  OUT out_open_cost_frac INT4,
+  OUT out_final_expiration INT8,
+  OUT out_no_funds BOOLEAN)
+LANGUAGE plpgsql
+AS $$
+BEGIN
+
+-- FIXME: implement!
+
+END $$
+
+
 COMMIT;

src/include/taler_exchangedb_plugin.h

@@ -4093,22 +4093,29 @@ struct TALER_EXCHANGEDB_Plugin
    *
    * @param cls closure
    * @param reserve_pub which reserve is this about?
-   * @param execution_date when did we perform the transfer?
+   * @param total_paid total amount paid (coins and reserve)
-   * @param receiver_account to which account do we transfer, in payto://-format
+   * @param reserve_payment amount to be paid from the reserve
-   * @param wtid identifier for the wire transfer
+   * @param min_purse_limit minimum number of purses we should be able to open
-   * @param amount_with_fee amount we charged to the reserve
+   * @param reserve_sig signature by the reserve for the operation
-   * @param closing_fee how high is the closing fee
+   * @param desired_expiration when should the reserve expire (earliest time)
+   * @param now when did we the client initiate the action
+   * @param open_fee annual fee to be charged for the open operation by the exchange
+   * @param[out] no_funds set to true if reserve balance is insufficient
+   * @param[out] open_cost set to the actual cost
+   * @param[out] final_expiration when will the reserve expire now
    * @return transaction status code
    */
   enum GNUNET_DB_QueryStatus
   (*do_reserve_open)(void *cls,
                      const struct TALER_ReservePublicKeyP *reserve_pub,
                      const struct TALER_Amount *total_paid,
+                     const struct TALER_Amount *reserve_payment,
                      uint32_t min_purse_limit,
                      const struct TALER_ReserveSignatureP *reserve_sig,
                      struct GNUNET_TIME_Timestamp desired_expiration,
                      struct GNUNET_TIME_Timestamp now,
                      const struct TALER_Amount *open_fee,
+                     bool *no_funds,
                      struct TALER_Amount *open_cost,
                      struct GNUNET_TIME_Timestamp *final_expiration);