From 27c921c7c45f8ea8fed5c945a9e0ae0cfcc1c8e9 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Thu, 20 Apr 2017 21:38:02 +0200
Subject: finished implementing #4956 in principle, but not yet tested

---
 src/include/taler_exchange_service.h  |  2 +-
 src/include/taler_exchangedb_lib.h    |  1 +
 src/include/taler_exchangedb_plugin.h | 49 +++++++++++++++++++++++++++++++----
 src/include/taler_signatures.h        |  9 ++-----
 4 files changed, 48 insertions(+), 13 deletions(-)

(limited to 'src/include')

diff --git a/src/include/taler_exchange_service.h b/src/include/taler_exchange_service.h
index 15e51bc2a..d1d6f3bda 100644
--- a/src/include/taler_exchange_service.h
+++ b/src/include/taler_exchange_service.h
@@ -765,7 +765,7 @@ struct TALER_EXCHANGE_ReserveHistory
       /**
        * Wire transfer details for the outgoing wire transfer.
        */
-      json_t *transfer_details;
+      struct TALER_WireTransferIdentifierRawP wtid;
 
       /**
        * Signature of the coin of type
diff --git a/src/include/taler_exchangedb_lib.h b/src/include/taler_exchangedb_lib.h
index 561738c22..e4284c27f 100644
--- a/src/include/taler_exchangedb_lib.h
+++ b/src/include/taler_exchangedb_lib.h
@@ -23,6 +23,7 @@
 #ifndef TALER_EXCHANGEDB_LIB_H
 #define TALER_EXCHANGEDB_LIB_H
 
+
 #include "taler_signatures.h"
 
 
diff --git a/src/include/taler_exchangedb_plugin.h b/src/include/taler_exchangedb_plugin.h
index 5daa9d2f8..b040077e8 100644
--- a/src/include/taler_exchangedb_plugin.h
+++ b/src/include/taler_exchangedb_plugin.h
@@ -100,8 +100,8 @@ struct TALER_EXCHANGEDB_ClosingTransfer
    * Detailed wire transfer information that uniquely identifies the
    * wire transfer.
    */
-  json_t *transfer_details;
-
+  struct TALER_WireTransferIdentifierRawP transfer_details;
+  
 };
 
 
@@ -991,7 +991,25 @@ typedef int
 					  const struct TALER_Amount *closing_fee,
 					  const struct TALER_ReservePublicKeyP *reserve_pub,
 					  const json_t *receiver_account,
-					  const json_t *transfer_details);
+					  const struct TALER_WireTransferIdentifierRawP *transfer_details);
+
+
+/**
+ * Function called with details about expired reserves.
+ *
+ * @param cls closure
+ * @param reserve_pub public key of the reserve
+ * @param left amount left in the reserve
+ * @param account_details information about the reserve's bank account
+ * @param expiration_date when did the reserve expire
+ * @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
+ */
+typedef int
+(*TALER_EXCHANGEDB_ReserveExpiredCallback)(void *cls,
+					   const struct TALER_ReservePublicKeyP *reserve_pub,
+					   const struct TALER_Amount *left,
+					   const json_t *account_details,
+					   struct GNUNET_TIME_Absolute expiration_date);
 
 
 /**
@@ -1783,6 +1801,27 @@ struct TALER_EXCHANGEDB_Plugin
                    struct TALER_MasterSignatureP *master_sig);
 
 
+  /**
+   * Obtain information about expired reserves and their
+   * remaining balances.
+   *
+   * @param cls closure of the plugin
+   * @param session database connection
+   * @param now timestamp based on which we decide expiration
+   * @param rec function to call on expired reserves
+   * @param rec_cls closure for @a rec
+   * @return #GNUNET_SYSERR on database error
+   *         #GNUNET_NO if there are no expired non-empty reserves
+   *         #GNUNET_OK on success
+   */
+  int
+  (*get_expired_reserves)(void *cls,
+			  struct TALER_EXCHANGEDB_Session *session,
+			  struct GNUNET_TIME_Absolute now,
+			  TALER_EXCHANGEDB_ReserveExpiredCallback rec,
+			  void *rec_cls);
+
+  
   /**
    * Insert reserve close operation into database.
    *
@@ -1800,10 +1839,10 @@ struct TALER_EXCHANGEDB_Plugin
   int
   (*insert_reserve_closed)(void *cls,
 			   struct TALER_EXCHANGEDB_Session *session,
-			   struct TALER_ReservePublicKeyP *reserve_pub,
+			   const struct TALER_ReservePublicKeyP *reserve_pub,
 			   struct GNUNET_TIME_Absolute execution_date,
 			   const json_t *receiver_account,
-			   const json_t *transfer_details,
+			   const struct TALER_WireTransferIdentifierRawP *transfer_details,
 			   const struct TALER_Amount *amount_with_fee,
 			   const struct TALER_Amount *closing_fee);
 
diff --git a/src/include/taler_signatures.h b/src/include/taler_signatures.h
index de9a2f7c7..f46013090 100644
--- a/src/include/taler_signatures.h
+++ b/src/include/taler_signatures.h
@@ -46,11 +46,6 @@
  */
 #define TALER_CNC_KAPPA 3
 
-/**
- * After what time do idle reserves "expire"?  We might want to make
- * this a configuration option (eventually).
- */
-#define TALER_IDLE_RESERVE_EXPIRATION_TIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_YEARS, 5)
 
 /*********************************************/
 /* Exchange offline signatures (with master key) */
@@ -1269,9 +1264,9 @@ struct TALER_ReserveCloseConfirmationPS
   struct GNUNET_HashCode h_wire;
 
   /**
-   * Hash of the transfer details.
+   * Wire transfer subject.
    */
-  struct GNUNET_HashCode h_transfer;
+  struct TALER_WireTransferIdentifierRawP wtid;
 };
 
 
-- 
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