-update pay to return confirmation code

1 files changed, 24 insertions, 2 deletions

diff --git a/src/backend/taler-merchant-httpd_post-orders-ID-pay.c b/src/backend/taler-merchant-httpd_post-orders-ID-pay.c
index e9f7895d..9b9b1a00 100644
--- a/src/backend/taler-merchant-httpd_post-orders-ID-pay.c
+++ b/src/backend/taler-merchant-httpd_post-orders-ID-pay.c
@@ -1,6 +1,6 @@
 /*
    This file is part of TALER
-   (C) 2014-2022 Taler Systems SA
+   (C) 2014-2023 Taler Systems SA
 
    TALER is free software; you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as
@@ -368,6 +368,16 @@ struct PayContext
   struct GNUNET_TIME_Timestamp pay_deadline;
 
   /**
+   * Set to the POS key, if applicable for this order.
+   */
+  char *pos_key;
+
+  /**
+   * Algorithm chosen for generating the confirmation code.
+   */
+  enum TALER_MerchantConfirmationAlgorithm pos_alg;
+
+  /**
    * Number of transactions that the wire fees are expected to be
    * amortized over.  Never zero, defaults (conservateively) to 1.
    * May be higher if merchants expect many small transactions to
@@ -716,6 +726,7 @@ pay_context_cleanup (void *cls)
   GNUNET_CONTAINER_DLL_remove (pc_head,
                                pc_tail,
                                pc);
+  GNUNET_free (pc->pos_key);
   GNUNET_free (pc);
 }
 
@@ -1947,6 +1958,7 @@ static void
 generate_success_response (struct PayContext *pc)
 {
   struct GNUNET_CRYPTO_EddsaSignature sig;
+  char *pos_confirmation;
 
   /* Sign on our end (as the payment did go through, even if it may
      have been refunded already) */
@@ -1954,12 +1966,22 @@ generate_success_response (struct PayContext *pc)
                            &pc->hc->instance->merchant_priv,
                            &sig);
   /* Build the response */
+  pos_confirmation = (NULL == pc->pos_key)
+    ? NULL
+    : TALER_build_pos_confirmation (pc->pos_key,
+                                    pc->pos_alg,
+                                    &pc->total_paid,
+                                    pc->timestamp);
   resume_pay_with_response (
     pc,
     MHD_HTTP_OK,
     TALER_MHD_MAKE_JSON_PACK (
+      GNUNET_JSON_pack_allow_null (
+        GNUNET_JSON_pack_string ("pos_confirmation",
+                                 pos_confirmation)),
       GNUNET_JSON_pack_data_auto ("sig",
                                   &sig)));
+  GNUNET_free (pos_confirmation);
 }
 
 
@@ -2563,7 +2585,7 @@ check_contract (struct PayContext *pc)
                                       &pc->contract_terms,
                                       &pc->order_serial,
                                       &paid,
-                                      NULL);
+                                      NULL); // FIXME: add &pc->pos_key + &pc->pos_alg!
   if (0 > qs)
   {
     /* single, read-only SQL statements should never cause