[taler-exchange] branch master updated: [policy extensions] mark out work for #7999+#8001

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oec pushed a commit to branch master
in repository exchange.

The following commit(s) were added to refs/heads/master by this push:
     new 381c5efb [policy extensions] mark out work for #7999+#8001
381c5efb is described below

commit 381c5efb612e5393bb5a4e85420de8096b95a6e5
Author: Özgür Kesim <oec-taler@kesim.org>
AuthorDate: Wed Dec 6 12:37:51 2023 +0100

    [policy extensions] mark out work for #7999+#8001
---
 src/exchange/taler-exchange-httpd_extensions.c   | 44 ++++++++++++++++++++++--
 src/exchangedb/pg_add_policy_fulfillment_proof.c | 10 ++++--
 2 files changed, 49 insertions(+), 5 deletions(-)

diff --git a/src/exchange/taler-exchange-httpd_extensions.c 
b/src/exchange/taler-exchange-httpd_extensions.c
index dd0fada7..d62a618a 100644
--- a/src/exchange/taler-exchange-httpd_extensions.c
+++ b/src/exchange/taler-exchange-httpd_extensions.c
@@ -23,6 +23,7 @@
 #include "taler-exchange-httpd_keys.h"
 #include "taler-exchange-httpd_responses.h"
 #include "taler-exchange-httpd_extensions.h"
+#include "taler_extensions_policy.h"
 #include "taler_json_lib.h"
 #include "taler_mhd_lib.h"
 #include "taler_extensions.h"
@@ -256,11 +257,16 @@ policy_fulfillment_transaction (
 {
   struct TALER_PolicyFulfillmentTransactionData *fulfillment = cls;
 
+  /* FIXME[oec]: use connection and mhd_ret? */
+  (void) connection;
+  (void) mhd_ret;
+
   return TEH_plugin->add_policy_fulfillment_proof (TEH_plugin->cls,
                                                    fulfillment);
 }
 
 
+/* FIXME[oec]-#7999: In this handler: do we transition correctly between 
states? */
 MHD_RESULT
 TEH_extensions_post_handler (
   struct TEH_RequestContext *rc,
@@ -338,14 +344,48 @@ TEH_extensions_post_handler (
       qs = TEH_plugin->get_policy_details (TEH_plugin->cls,
                                            &hcs[idx],
                                            &policy_details[idx]);
-      if (qs < 0)
+      if (0 > qs)
+      {
+        GNUNET_free (hcs);
+        GNUNET_free (policy_details);
+        return TALER_MHD_reply_with_error (rc->connection,
+                                           MHD_HTTP_BAD_REQUEST,
+                                           
TALER_EC_EXCHANGE_GENERIC_OPERATION_UNKNOWN,
+                                           "a policy_hash_code couldn't be 
found");
+      }
+
+      /* We proceed according to the state of fulfillment */
+      switch (policy_details[idx].fulfillment_state)
       {
-        error_msg = "a policy_hash_code couldn't be found";
+      case TALER_PolicyFulfillmentReady:
+        break;
+      case TALER_PolicyFulfillmentInsufficient:
+        error_msg = "a policy is not yet fully funded";
+        ret = GNUNET_SYSERR;
+        break;
+      case TALER_PolicyFulfillmentTimeout:
+        error_msg = "a policy is has already timed out";
+        ret = GNUNET_SYSERR;
         break;
+      case TALER_PolicyFulfillmentSuccess:
+        /* FIXME[oec]-#8001: Idempotency handling. */
+        GNUNET_break (0);
+        break;
+      case TALER_PolicyFulfillmentFailure:
+        /* FIXME[oec]-#7999: What to do in the failure case? */
+        GNUNET_break (0);
+        break;
+      default:
+        /* Unknown state */
+        GNUNET_assert (0);
       }
+
+      if (GNUNET_OK != ret)
+        break;
     }
 
     GNUNET_free (hcs);
+
     if (GNUNET_OK != ret)
     {
       GNUNET_free (policy_details);
diff --git a/src/exchangedb/pg_add_policy_fulfillment_proof.c 
b/src/exchangedb/pg_add_policy_fulfillment_proof.c
index 0fd6b1c9..93d07071 100644
--- a/src/exchangedb/pg_add_policy_fulfillment_proof.c
+++ b/src/exchangedb/pg_add_policy_fulfillment_proof.c
@@ -55,6 +55,7 @@ TEH_PG_add_policy_fulfillment_proof (
   enum GNUNET_DB_QueryStatus qs;
   struct PostgresClosure *pg = cls;
   size_t count = fulfillment->details_count;
+  /* FIXME: this seems to be prone to VLA attacks */
   struct GNUNET_HashCode hcs[count];
 
   /* Create the sorted policy_hash_codes */
@@ -84,8 +85,7 @@ TEH_PG_add_policy_fulfillment_proof (
       GNUNET_PQ_query_param_timestamp (&fulfillment->timestamp),
       TALER_PQ_query_param_json (fulfillment->proof),
       GNUNET_PQ_query_param_auto_from_type (&fulfillment->h_proof),
-      GNUNET_PQ_query_param_fixed_size (hcs,
-                                        count * sizeof(struct 
GNUNET_HashCode)),
+      TALER_PQ_query_param_array_hash_code (count, hcs, pg->conn),
       GNUNET_PQ_query_param_end
     };
     struct GNUNET_PQ_ResultSpec rs[] = {
@@ -132,7 +132,6 @@ TEH_PG_add_policy_fulfillment_proof (
         GNUNET_PQ_query_param_end
       };
 
-      // FIXME-Oec: review if this is the intended logic here!
       PREPARE (pg,
                "update_policy_details",
                "UPDATE policy_details SET"
@@ -151,5 +150,10 @@ TEH_PG_add_policy_fulfillment_proof (
     }
   }
 
+  /*
+   * FIXME[oec]-#7999: When all policies of a deposit are fulfilled,
+   * unblock it and trigger a wire-transfer.
+   */
+
   return qs;
 }

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