From 01f946e7e059ad4f1490593145b783db6951b989 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Thu, 5 May 2016 08:33:30 +0200
Subject: parse out /contract response details

---
 src/include/taler_merchant_service.h | 10 ++++++++--
 src/lib/merchant_api_contract.c      | 38 ++++++++++++++++++++++++++++++++++--
 2 files changed, 44 insertions(+), 4 deletions(-)

diff --git a/src/include/taler_merchant_service.h b/src/include/taler_merchant_service.h
index 5d72e6e9..fc98f09b 100644
--- a/src/include/taler_merchant_service.h
+++ b/src/include/taler_merchant_service.h
@@ -41,13 +41,19 @@ struct TALER_MERCHANT_ContractOperation;
  * @param cls closure
  * @param http_status HTTP response code, 200 indicates success;
  *                    0 if the backend's reply is bogus (fails to follow the protocol)
- * @param obj the received JSON reply, with the contract on success, or
+ * @param obj the full received JSON reply, or
  *            error details if the request failed
+ * @param contract completed contract, NULL on error
+ * @param sig merchant's signature over the contract, NULL on error
+ * @param h_contract hash of the contract, NULL on error
  */
 typedef void
 (*TALER_MERCHANT_ContractCallback) (void *cls,
                                     unsigned int http_status,
-                                    const json_t *obj);
+                                    const json_t *obj,
+                                    const json_t *contract,
+                                    const struct TALER_MerchantSignatureP *sig,
+                                    const struct GNUNET_HashCode *h_contract);
 
 
 /**
diff --git a/src/lib/merchant_api_contract.c b/src/lib/merchant_api_contract.c
index f8c3bcd3..fa327a5d 100644
--- a/src/lib/merchant_api_contract.c
+++ b/src/lib/merchant_api_contract.c
@@ -68,7 +68,6 @@ struct TALER_MERCHANT_ContractOperation
 };
 
 
-
 /**
  * Function called when we're done processing the
  * HTTP /contract request.
@@ -83,13 +82,43 @@ handle_contract_finished (void *cls,
                           const json_t *json)
 {
   struct TALER_MERCHANT_ContractOperation *co = cls;
+  json_t *contract;
+  const struct TALER_MerchantSignatureP *sigp;
+  const struct GNUNET_HashCode *h_contractp;
+  struct TALER_MerchantSignatureP sig;
+  struct GNUNET_HashCode h_contract;
 
   co->job = NULL;
+  contract = NULL;
+  sigp = NULL;
+  h_contractp = NULL;
   switch (response_code)
   {
   case 0:
     break;
   case MHD_HTTP_OK:
+    {
+      struct GNUNET_JSON_Specification spec[] = {
+        GNUNET_JSON_spec_json ("contract", &contract),
+        GNUNET_JSON_spec_fixed_auto ("merchant_sig", &sig),
+        GNUNET_JSON_spec_fixed_auto ("H_contract", &h_contract),
+        GNUNET_JSON_spec_end()
+      };
+
+      if (GNUNET_OK !=
+          GNUNET_JSON_parse (json,
+                             spec,
+                             NULL, NULL))
+      {
+        GNUNET_break_op (0);
+        response_code = 0;
+      }
+      else
+      {
+        h_contractp = &h_contract;
+        sigp = &sig;
+      }
+    }
     break;
   case MHD_HTTP_BAD_REQUEST:
     /* This should never happen, either us or the merchant is buggy
@@ -121,7 +150,12 @@ handle_contract_finished (void *cls,
   }
   co->cb (co->cb_cls,
           response_code,
-          json);
+          json,
+          contract,
+          sigp,
+          h_contractp);
+  if (NULL != contract)
+    json_decref (contract);
   TALER_MERCHANT_contract_sign_cancel (co);
 }
 
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