[taler-exchange] branch master updated: -towards purse merge and history requests in reserve history (incomplete)

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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 8658ae03 -towards purse merge and history requests in reserve history 
(incomplete)
8658ae03 is described below

commit 8658ae03cab72142b2376d5318e039320b02913a
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Sun May 22 16:58:48 2022 +0200

    -towards purse merge and history requests in reserve history (incomplete)
---
 src/exchangedb/exchange-0001-part.sql       |  4 +-
 src/exchangedb/plugin_exchangedb_common.c   | 14 +++++
 src/exchangedb/plugin_exchangedb_postgres.c | 93 ++++++++++++++++++++++++++-
 src/exchangedb/test_exchangedb.c            | 10 +++
 src/include/taler_exchangedb_plugin.h       | 97 ++++++++++++++++++++++++++++-
 5 files changed, 213 insertions(+), 5 deletions(-)

diff --git a/src/exchangedb/exchange-0001-part.sql 
b/src/exchangedb/exchange-0001-part.sql
index a47a2aed..21810034 100644
--- a/src/exchangedb/exchange-0001-part.sql
+++ b/src/exchangedb/exchange-0001-part.sql
@@ -3452,11 +3452,11 @@ BEGIN
   IF NOT FOUND
   THEN
     out_balance_ok=TRUE;
-    out_conflict=TRUE;
+    out_idempotent=TRUE;
     RETURN;
   END IF;
 
-  out_conflict=FALSE;
+  out_idempotent=FALSE;
 
   -- Update reserve balance.
   UPDATE reserves
diff --git a/src/exchangedb/plugin_exchangedb_common.c 
b/src/exchangedb/plugin_exchangedb_common.c
index a07ae78c..c9ffa5b8 100644
--- a/src/exchangedb/plugin_exchangedb_common.c
+++ b/src/exchangedb/plugin_exchangedb_common.c
@@ -71,6 +71,20 @@ common_free_reserve_history (void *cls,
         GNUNET_free (closing);
         break;
       }
+    case TALER_EXCHANGEDB_RO_PURSE_MERGE:
+      {
+        struct TALER_EXCHANGEDB_PurseMerge *merge;
+
+        merge = rh->details.merge;
+        GNUNET_free (merge);
+      }
+    case TALER_EXCHANGEDB_RO_HISTORY_REQUEST:
+      {
+        struct TALER_EXCHANGEDB_HistoryRequest *history;
+
+        history = rh->details.history;
+        GNUNET_free (history);
+      }
     }
     {
       struct TALER_EXCHANGEDB_ReserveHistory *next;
diff --git a/src/exchangedb/plugin_exchangedb_postgres.c 
b/src/exchangedb/plugin_exchangedb_postgres.c
index 5d84a2af..8f182800 100644
--- a/src/exchangedb/plugin_exchangedb_postgres.c
+++ b/src/exchangedb/plugin_exchangedb_postgres.c
@@ -2126,6 +2126,43 @@ prepare_statements (struct PostgresClosure *pg)
       "     USING (wire_target_h_payto)"
       " WHERE reserve_pub=$1;",
       1),
+    /* Used in #postgres_get_reserve_history() */
+    GNUNET_PQ_make_prepare (
+      "merge_by_reserve",
+      "SELECT"
+      " pr.amount_with_fee_val"
+      ",pr.amount_with_fee_frac"
+      ",pr.purse_fee_val"
+      ",pr.purse_fee_frac"
+      ",pr.h_contract_terms"
+      ",pr.merge_pub"
+      ",pr.purse_sig"
+      ",am.reserve_sig"
+      ",pm.purse_pub"
+      ",pm.merge_sig"
+      ",pm.merge_timestamp"
+      " FROM purse_merges pm"
+      "   JOIN purse_requests pr"
+      "     USING (purse_pub)"
+      "   JOIN account_merges am"
+      "     ON (am.purse_pub = pm.purse_pub AND"
+      "         am.reserve_pub = pm.reserve_pub)"
+      " WHERE pm.reserve_pub=$1"
+      "  AND pm.partner_serial_id=0" /* must be local! */
+      "  AND pr.finished"
+      "  AND NOT pr.refunded;",
+      1),
+    /* Used in #postgres_get_reserve_history() */
+    GNUNET_PQ_make_prepare (
+      "history_by_reserve",
+      "SELECT"
+      " history_fee_val"
+      ",history_fee_frac"
+      ",request_timestamp"
+      ",reserve_sig"
+      " FROM history_requests"
+      " WHERE reserve_pub=$1;",
+      1),
     /* Used in #postgres_get_expired_reserves() */
     GNUNET_PQ_make_prepare (
       "get_expired_reserves",
@@ -6131,6 +6168,54 @@ add_exchange_to_bank (void *cls,
 }
 
 
+/**
+ * Add purse merge transfers to result set for
+ * #postgres_get_reserve_history.
+ *
+ * @param cls a `struct ReserveHistoryContext *`
+ * @param result SQL result
+ * @param num_results number of rows in @a result
+ */
+static void
+add_p2p_merge (void *cls,
+               PGresult *result,
+               unsigned int num_results)
+{
+  struct ReserveHistoryContext *rhc = cls;
+  struct PostgresClosure *pg = rhc->pg;
+
+  while (0 < num_results)
+  {
+    // FIXME!
+    GNUNET_break (0);
+  }
+}
+
+
+/**
+ * Add paid for history requests to result set for
+ * #postgres_get_reserve_history.
+ *
+ * @param cls a `struct ReserveHistoryContext *`
+ * @param result SQL result
+ * @param num_results number of rows in @a result
+ */
+static void
+add_history_requests (void *cls,
+                      PGresult *result,
+                      unsigned int num_results)
+{
+  struct ReserveHistoryContext *rhc = cls;
+  struct PostgresClosure *pg = rhc->pg;
+
+  while (0 < num_results)
+  {
+    // FIXME!
+    GNUNET_break (0);
+  }
+}
+
+
 /**
  * Get all of the transaction history associated with the specified
  * reserve.
@@ -6163,7 +6248,6 @@ postgres_get_reserve_history (void *cls,
     /** #TALER_EXCHANGEDB_RO_BANK_TO_EXCHANGE */
     { "reserves_in_get_transactions",
       add_bank_to_exchange },
-#ifndef GRID5K_MARCO_OPT
     /** #TALER_EXCHANGEDB_RO_WITHDRAW_COIN */
     { "get_reserves_out",
       &add_withdraw_coin },
@@ -6173,7 +6257,12 @@ postgres_get_reserve_history (void *cls,
     /** #TALER_EXCHANGEDB_RO_EXCHANGE_TO_BANK */
     { "close_by_reserve",
       &add_exchange_to_bank },
-#endif
+    /** #TALER_EXCHANGEDB_RO_PURSE_MERGE */
+    { "merge_by_reserve",
+      &add_p2p_merge },
+    /** #TALER_EXCHANGEDB_RO_HISTORY_REQUEST */
+    { "history_by_reserve",
+      &add_history_requests },
     /* List terminator */
     { NULL,
       NULL }
diff --git a/src/exchangedb/test_exchangedb.c b/src/exchangedb/test_exchangedb.c
index 4112b3d1..127895d6 100644
--- a/src/exchangedb/test_exchangedb.c
+++ b/src/exchangedb/test_exchangedb.c
@@ -1906,6 +1906,16 @@ run (void *cls)
                                        &fee_closing));
       }
       break;
+    case TALER_EXCHANGEDB_RO_PURSE_MERGE:
+      {
+        /* FIXME: not yet tested */
+        break;
+      }
+    case TALER_EXCHANGEDB_RO_HISTORY_REQUEST:
+      {
+        /* FIXME: not yet tested */
+        break;
+      }
     }
   }
   FAILIF (4 != cnt);
diff --git a/src/include/taler_exchangedb_plugin.h 
b/src/include/taler_exchangedb_plugin.h
index 2ef29123..68faf34f 100644
--- a/src/include/taler_exchangedb_plugin.h
+++ b/src/include/taler_exchangedb_plugin.h
@@ -978,6 +978,81 @@ struct TALER_EXCHANGEDB_RecoupRefreshListEntry
 };
 
 
+/**
+ * Details about a purse merge operation.
+ */
+struct TALER_EXCHANGEDB_PurseMerge
+{
+  /**
+   * Amount in the purse, with fees.
+   */
+  struct TALER_Amount amount_with_fee;
+
+  /**
+   * Fee paid for the purse.
+   */
+  struct TALER_Amount purse_fee;
+
+  /**
+   * Hash over the contract.
+   */
+  struct TALER_PrivateContractHashP h_contract_terms;
+
+  /**
+   * Merge capability key.
+   */
+  struct TALER_PurseMergePublicKeyP merge_pub;
+
+  /**
+   * Purse signature.
+   */
+  struct TALER_PurseContractSignatureP purse_sig;
+
+  /**
+   * Purse public key.
+   */
+  struct TALER_PurseContractPublicKeyP purse_pub;
+
+  /**
+   * Merge signature.
+   */
+  struct TALER_PurseMergePublicKeyP merge_sig;
+
+  /**
+   * Signature by the reserve approving the merge.
+   */
+  struct TALER_ReserveSignatureP reserve_sig;
+
+  /**
+   * When was the merge made.
+   */
+  struct GNUNET_TIME_Timestamp merge_timestamp;
+
+};
+
+
+/**
+ * Details about a (paid for) reserve history request.
+ */
+struct TALER_EXCHANGEDB_HistoryRequest
+{
+  /**
+   * Fee paid for the request.
+   */
+  struct TALER_Amount history_fee;
+
+  /**
+   * When was the request made.
+   */
+  struct GNUNET_TIME_Timestamp request_timestamp;
+
+  /**
+   * Signature by the reserve approving the history request.
+   */
+  struct TALER_ReserveSignatureP reserve_sig;
+};
+
+
 /**
  * @brief Types of operations on a reserve.
  */
@@ -1004,7 +1079,17 @@ enum TALER_EXCHANGEDB_ReserveOperation
    * customer's bank account.  This happens when the exchange
    * closes a reserve with a non-zero amount left in it.
    */
-  TALER_EXCHANGEDB_RO_EXCHANGE_TO_BANK = 3
+  TALER_EXCHANGEDB_RO_EXCHANGE_TO_BANK = 3,
+
+  /**
+   * Event where a purse was merged into a reserve.
+   */
+  TALER_EXCHANGEDB_RO_PURSE_MERGE = 4,
+
+  /**
+   * Event where a wallet paid for a full reserve history.
+   */
+  TALER_EXCHANGEDB_RO_HISTORY_REQUEST = 5
 };
 
 
@@ -1055,6 +1140,16 @@ struct TALER_EXCHANGEDB_ReserveHistory
      */
     struct TALER_EXCHANGEDB_ClosingTransfer *closing;
 
+    /**
+     * Details about a purse merge operation.
+     */
+    struct TALER_EXCHANGEDB_PurseMerge *merge;
+
+    /**
+     * Details about a (paid for) reserve history request.
+     */
+    struct TALER_EXCHANGEDB_HistoryRequest *history;
+
   } details;
 
 };

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