[taler-exchange] branch master updated: handle reserve open/close responses in reserve history in libtalerexchange

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grothoff pushed a commit to branch master
in repository exchange.

The following commit(s) were added to refs/heads/master by this push:
     new 518c7009 handle reserve open/close responses in reserve history in 
libtalerexchange
518c7009 is described below

commit 518c7009e7b19d681852a91e30028d37e6f55cd1
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Sat Oct 15 22:03:55 2022 +0200

    handle reserve open/close responses in reserve history in libtalerexchange
---
 src/include/taler_exchange_service.h      |  81 ++++++++++++++++++-
 src/lib/exchange_api_common.c             | 126 +++++++++++++++++++++++++++++-
 src/testing/testing_api_cmd_common.c      |   8 +-
 src/testing/testing_api_cmd_exec_closer.c |  10 +--
 src/util/wallet_signatures.c              |   4 +-
 5 files changed, 216 insertions(+), 13 deletions(-)

diff --git a/src/include/taler_exchange_service.h 
b/src/include/taler_exchange_service.h
index 2abd6b2a..6268f45a 100644
--- a/src/include/taler_exchange_service.h
+++ b/src/include/taler_exchange_service.h
@@ -1505,7 +1505,7 @@ enum TALER_EXCHANGE_ReserveTransactionType
   /**
    * Reserve closed operation.
    */
-  TALER_EXCHANGE_RTT_CLOSE,
+  TALER_EXCHANGE_RTT_CLOSING,
 
   /**
    * Reserve history request.
@@ -1513,9 +1513,19 @@ enum TALER_EXCHANGE_ReserveTransactionType
   TALER_EXCHANGE_RTT_HISTORY,
 
   /**
-   * Reserve purese merge operation.
+   * Reserve purse merge operation.
    */
-  TALER_EXCHANGE_RTT_MERGE
+  TALER_EXCHANGE_RTT_MERGE,
+
+  /**
+   * Reserve open request operation.
+   */
+  TALER_EXCHANGE_RTT_OPEN,
+
+  /**
+   * Reserve close request operation.
+   */
+  TALER_EXCHANGE_RTT_CLOSE
 
 };
 
@@ -1730,6 +1740,71 @@ struct TALER_EXCHANGE_ReserveHistoryEntry
 
     } merge_details;
 
+    /**
+     * Information about an open request operation on the reserve.
+     * @e type is #TALER_EXCHANGE_RTT_OPEN.
+     */
+    struct
+    {
+
+      /**
+       * Signature by the reserve approving the open.
+       */
+      struct TALER_ReserveSignatureP reserve_sig;
+
+      /**
+       * Amount to be paid from the reserve balance to open
+       * the reserve.
+       */
+      struct TALER_Amount reserve_payment;
+
+      /**
+       * When was the request created.
+       */
+      struct GNUNET_TIME_Timestamp request_timestamp;
+
+      /**
+       * For how long should the reserve be kept open.
+       * (Determines amount to be paid.)
+       */
+      struct GNUNET_TIME_Timestamp reserve_expiration;
+
+      /**
+       * How many open purses should be included with the
+       * open reserve?
+       * (Determines amount to be paid.)
+       */
+      uint32_t purse_limit;
+
+    } open_request;
+
+    /**
+     * Information about an close request operation on the reserve.
+     * @e type is #TALER_EXCHANGE_RTT_CLOSE.
+     */
+    struct
+    {
+
+      /**
+       * Signature by the reserve approving the close.
+       */
+      struct TALER_ReserveSignatureP reserve_sig;
+
+      /**
+       * When was the request created.
+       */
+      struct GNUNET_TIME_Timestamp request_timestamp;
+
+      /**
+       * Hash of the payto://-URI of the target account
+       * for the closure, or all zeros for the reserve
+       * origin account.
+       */
+      struct TALER_PaytoHashP target_account_h_payto;
+
+    } close_request;
+
+
   } details;
 
 };
diff --git a/src/lib/exchange_api_common.c b/src/lib/exchange_api_common.c
index 2cb379f8..d758fc98 100644
--- a/src/lib/exchange_api_common.c
+++ b/src/lib/exchange_api_common.c
@@ -340,7 +340,7 @@ parse_closing (struct TALER_EXCHANGE_ReserveHistoryEntry 
*rh,
     GNUNET_JSON_spec_end ()
   };
 
-  rh->type = TALER_EXCHANGE_RTT_CLOSE;
+  rh->type = TALER_EXCHANGE_RTT_CLOSING;
   if (GNUNET_OK !=
       GNUNET_JSON_parse (transaction,
                          closing_spec,
@@ -531,6 +531,120 @@ parse_history (struct TALER_EXCHANGE_ReserveHistoryEntry 
*rh,
 }
 
 
+/**
+ * Parse "open" reserve open entry.
+ *
+ * @param[in,out] rh entry to parse
+ * @param uc our context
+ * @param transaction the transaction to parse
+ * @return #GNUNET_OK on success
+ */
+static enum GNUNET_GenericReturnValue
+parse_open (struct TALER_EXCHANGE_ReserveHistoryEntry *rh,
+            struct HistoryParseContext *uc,
+            const json_t *transaction)
+{
+  struct GNUNET_JSON_Specification open_spec[] = {
+    GNUNET_JSON_spec_fixed_auto ("reserve_sig",
+                                 &rh->details.open_request.reserve_sig),
+    TALER_JSON_spec_amount_any ("open_payment",
+                                &rh->details.open_request.reserve_payment),
+    GNUNET_JSON_spec_uint32 ("requested_min_purses",
+                             &rh->details.open_request.purse_limit),
+    GNUNET_JSON_spec_timestamp ("request_timestamp",
+                                &rh->details.open_request.request_timestamp),
+    GNUNET_JSON_spec_timestamp ("requested_expiration",
+                                &rh->details.open_request.reserve_expiration),
+    GNUNET_JSON_spec_end ()
+  };
+
+  rh->type = TALER_EXCHANGE_RTT_OPEN;
+  if (GNUNET_OK !=
+      GNUNET_JSON_parse (transaction,
+                         open_spec,
+                         NULL, NULL))
+  {
+    GNUNET_break_op (0);
+    return GNUNET_SYSERR;
+  }
+  if (GNUNET_OK !=
+      TALER_wallet_reserve_open_verify (
+        &rh->amount,
+        rh->details.open_request.request_timestamp,
+        rh->details.open_request.reserve_expiration,
+        rh->details.open_request.purse_limit,
+        uc->reserve_pub,
+        &rh->details.open_request.reserve_sig))
+  {
+    GNUNET_break_op (0);
+    return GNUNET_SYSERR;
+  }
+  if (0 >
+      TALER_amount_add (uc->total_out,
+                        uc->total_out,
+                        &rh->amount))
+  {
+    /* overflow in history already!? inconceivable! Bad exchange! */
+    GNUNET_break_op (0);
+    return GNUNET_SYSERR;
+  }
+  return GNUNET_OK;
+}
+
+
+/**
+ * Parse "close" reserve close entry.
+ *
+ * @param[in,out] rh entry to parse
+ * @param uc our context
+ * @param transaction the transaction to parse
+ * @return #GNUNET_OK on success
+ */
+static enum GNUNET_GenericReturnValue
+parse_close (struct TALER_EXCHANGE_ReserveHistoryEntry *rh,
+             struct HistoryParseContext *uc,
+             const json_t *transaction)
+{
+  struct GNUNET_JSON_Specification close_spec[] = {
+    GNUNET_JSON_spec_fixed_auto ("reserve_sig",
+                                 &rh->details.close_request.reserve_sig),
+    GNUNET_JSON_spec_mark_optional (
+      GNUNET_JSON_spec_fixed_auto ("h_payto",
+                                   &rh->details.close_request.
+                                   target_account_h_payto),
+      NULL),
+    GNUNET_JSON_spec_timestamp ("request_timestamp",
+                                &rh->details.close_request.request_timestamp),
+    GNUNET_JSON_spec_end ()
+  };
+
+  rh->type = TALER_EXCHANGE_RTT_CLOSE;
+  if (GNUNET_OK !=
+      GNUNET_JSON_parse (transaction,
+                         close_spec,
+                         NULL, NULL))
+  {
+    GNUNET_break_op (0);
+    return GNUNET_SYSERR;
+  }
+  /* force amount to invalid */
+  memset (&rh->amount,
+          0,
+          sizeof (rh->amount));
+  if (GNUNET_OK !=
+      TALER_wallet_reserve_close_verify (
+        rh->details.close_request.request_timestamp,
+        &rh->details.close_request.target_account_h_payto,
+        uc->reserve_pub,
+        &rh->details.close_request.reserve_sig))
+  {
+    GNUNET_break_op (0);
+    return GNUNET_SYSERR;
+  }
+  return GNUNET_OK;
+}
+
+
 enum GNUNET_GenericReturnValue
 TALER_EXCHANGE_parse_reserve_history (
   struct TALER_EXCHANGE_Handle *exchange,
@@ -553,6 +667,8 @@ TALER_EXCHANGE_parse_reserve_history (
     { "MERGE", &parse_merge },
     { "CLOSING", &parse_closing },
     { "HISTORY", &parse_history },
+    { "OPEN", &parse_open },
+    { "CLOSE", &parse_close },
     { NULL, NULL }
   };
   struct GNUNET_HashCode uuid[history_length];
@@ -651,12 +767,16 @@ TALER_EXCHANGE_free_reserve_history (
       break;
     case TALER_EXCHANGE_RTT_RECOUP:
       break;
-    case TALER_EXCHANGE_RTT_CLOSE:
+    case TALER_EXCHANGE_RTT_CLOSING:
       break;
     case TALER_EXCHANGE_RTT_HISTORY:
       break;
     case TALER_EXCHANGE_RTT_MERGE:
       break;
+    case TALER_EXCHANGE_RTT_OPEN:
+      break;
+    case TALER_EXCHANGE_RTT_CLOSE:
+      break;
     }
   }
   GNUNET_free (rhistory);
@@ -1253,6 +1373,8 @@ TALER_EXCHANGE_verify_coin_history (
     { "RECOUP-REFRESH", &help_recoup_refresh },
     { "OLD-COIN-RECOUP", &help_old_coin_recoup },
     { "PURSE-DEPOSIT", &help_purse_deposit },
+    // FIXME: PURSE-REFUND missing here!
+    // FIXME: RESERVE-DEPOSIT missing here!
     { NULL, NULL }
   };
   struct CoinHistoryParseContext pc = {
diff --git a/src/testing/testing_api_cmd_common.c 
b/src/testing/testing_api_cmd_common.c
index 138e5502..bb0eb3f0 100644
--- a/src/testing/testing_api_cmd_common.c
+++ b/src/testing/testing_api_cmd_common.c
@@ -70,7 +70,7 @@ TALER_TESTING_history_entry_cmp (
                          &h2->details.recoup_details.coin_pub)) )
       return 0;
     return 1;
-  case TALER_EXCHANGE_RTT_CLOSE:
+  case TALER_EXCHANGE_RTT_CLOSING:
     /* testing_api_cmd_exec_closer doesn't set the
        receiver_account_details, exchange_sig, exchange_pub or wtid or 
timestamp
        so we cannot test for it here. but if the amount matches,
@@ -130,6 +130,12 @@ TALER_TESTING_history_entry_cmp (
           h2->details.merge_details.flags) )
       return 0;
     return 1;
+  case TALER_EXCHANGE_RTT_OPEN:
+    // FIXME: verify response...
+    return 1;
+  case TALER_EXCHANGE_RTT_CLOSE:
+    // FIXME: verify response...
+    return 1;
   }
   GNUNET_assert (0);
   return 1;
diff --git a/src/testing/testing_api_cmd_exec_closer.c 
b/src/testing/testing_api_cmd_exec_closer.c
index 75eab2d9..9ee436af 100644
--- a/src/testing/testing_api_cmd_exec_closer.c
+++ b/src/testing/testing_api_cmd_exec_closer.c
@@ -221,11 +221,11 @@ TALER_TESTING_cmd_exec_closer (const char *label,
     /* expected amount includes fee, while our argument
        gives the amount _without_ the fee. So add the fee. */
     GNUNET_assert (0 <=
-                   TALER_amount_add (&as->reserve_history.amount,
-                                     &as->reserve_history.amount,
-                                     
&as->reserve_history.details.close_details.
-                                     fee));
-    as->reserve_history.type = TALER_EXCHANGE_RTT_CLOSE;
+                   TALER_amount_add (
+                     &as->reserve_history.amount,
+                     &as->reserve_history.amount,
+                     &as->reserve_history.details.close_details.fee));
+    as->reserve_history.type = TALER_EXCHANGE_RTT_CLOSING;
   }
   {
     struct TALER_TESTING_Command cmd = {
diff --git a/src/util/wallet_signatures.c b/src/util/wallet_signatures.c
index 1209bb69..19291439 100644
--- a/src/util/wallet_signatures.c
+++ b/src/util/wallet_signatures.c
@@ -1237,7 +1237,7 @@ TALER_wallet_account_merge_verify (
 GNUNET_NETWORK_STRUCT_BEGIN
 
 /**
- * Message signed by
+ * Message signed by reserve key.
  */
 struct TALER_ReserveOpenPS
 {
@@ -1404,7 +1404,7 @@ TALER_wallet_reserve_open_deposit_verify (
 GNUNET_NETWORK_STRUCT_BEGIN
 
 /**
- * Message signed by
+ * Message signed by reserve key.
  */
 struct TALER_ReserveClosePS
 {

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