From a322770d290cae69e7d2f7629ee575e068254428 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 27 Nov 2022 14:05:47 +0100
Subject: more work on SQL refactoring

---
 src/exchangedb/0002-refresh_transfer_keys.sql | 82 +++++++++++++++++++++++----
 1 file changed, 71 insertions(+), 11 deletions(-)

(limited to 'src/exchangedb/0002-refresh_transfer_keys.sql')

diff --git a/src/exchangedb/0002-refresh_transfer_keys.sql b/src/exchangedb/0002-refresh_transfer_keys.sql
index 54274b262..078015907 100644
--- a/src/exchangedb/0002-refresh_transfer_keys.sql
+++ b/src/exchangedb/0002-refresh_transfer_keys.sql
@@ -14,8 +14,8 @@
 -- TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 --
 
-CREATE OR REPLACE FUNCTION create_table_refresh_transfer_keys(
-  IN shard_suffix VARCHAR DEFAULT NULL
+CREATE FUNCTION create_table_refresh_transfer_keys(
+  IN partition_suffix VARCHAR DEFAULT NULL
 )
 RETURNS VOID
 LANGUAGE plpgsql
@@ -23,33 +23,83 @@ AS $$
 DECLARE
   table_name VARCHAR DEFAULT 'refresh_transfer_keys';
 BEGIN
-
   PERFORM create_partitioned_table(
-    'CREATE TABLE IF NOT EXISTS %I'
-      '(rtc_serial BIGINT GENERATED BY DEFAULT AS IDENTITY' -- UNIQUE'
-      ',melt_serial_id INT8 PRIMARY KEY' -- REFERENCES refresh_commitments (melt_serial_id) ON DELETE CASCADE'
+    'CREATE TABLE %I'
+      '(rtc_serial BIGINT GENERATED BY DEFAULT AS IDENTITY'
+      ',melt_serial_id INT8 PRIMARY KEY'
       ',transfer_pub BYTEA NOT NULL CHECK(LENGTH(transfer_pub)=32)'
       ',transfer_privs BYTEA NOT NULL'
     ') %s ;'
     ,table_name
     ,'PARTITION BY HASH (melt_serial_id)'
-    ,shard_suffix
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_table(
+     'Transfer keys of a refresh operation (the data revealed to the exchange).'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'needed for exchange-auditor replication logic'
+    ,'rtc_serial'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'Identifies the refresh commitment (rc) of the operation.'
+    ,'melt_serial_id'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'transfer public key for the gamma index'
+    ,'transfer_pub'
+    ,table_name
+    ,partition_suffix
   );
+  PERFORM comment_partitioned_column(
+     'array of TALER_CNC_KAPPA-1 transfer private keys that have been revealed, with the gamma entry being skipped'
+    ,'transfer_privs'
+    ,table_name
+    ,partition_suffix
+  );
+END
+$$;
 
+
+CREATE FUNCTION constrain_table_refresh_transfer_keys(
+  IN partition_suffix VARCHAR
+)
+RETURNS void
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  table_name VARCHAR DEFAULT 'refresh_transfer_keys';
+BEGIN
+  table_name = concat_ws('_', table_name, partition_suffix);
+  EXECUTE FORMAT (
+    'ALTER TABLE ' || table_name ||
+    ' ADD CONSTRAINT ' || table_name || '_rtc_serial_key'
+    ' UNIQUE (rtc_serial)'
+  );
 END
 $$;
 
-CREATE OR REPLACE FUNCTION add_constraints_to_refresh_transfer_keys_partition(
+
+CREATE FUNCTION foreign_table_refresh_transfer_keys(
   IN partition_suffix VARCHAR
 )
 RETURNS void
 LANGUAGE plpgsql
 AS $$
+DECLARE
+  table_name VARCHAR DEFAULT 'refresh_transfer_keys';
 BEGIN
+  table_name = concat_ws('_', table_name, partition_suffix);
   EXECUTE FORMAT (
-    'ALTER TABLE refresh_transfer_keys_' || partition_suffix || ' '
-      'ADD CONSTRAINT refresh_transfer_keys_' || partition_suffix || '_rtc_serial_key '
-        'UNIQUE (rtc_serial)'
+    'ALTER TABLE ' || table_name ||
+    ' ADD CONSTRAINT ' || table_name || 'foreign_melt_serial_id'
+    ' REFERENCES refresh_commitments (melt_serial_id) ON DELETE CASCADE'
   );
 END
 $$;
@@ -66,4 +116,14 @@ INSERT INTO exchange_tables
     ,'exchange-0002'
     ,'create'
     ,TRUE
+    ,FALSE),
+    ('refresh_transfer_keys'
+    ,'exchange-0002'
+    ,'constrain'
+    ,TRUE
+    ,FALSE),
+    ('refresh_transfer_keys'
+    ,'exchange-0002'
+    ,'foreign'
+    ,TRUE
     ,FALSE);
-- 
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