From 4f75bcdca35b1ce8aa1f3db444c63f4763e28301 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 27 Nov 2022 14:45:01 +0100
Subject: more work on SQL refactoring

---
 src/exchangedb/0002-cs_nonce_locks.sql | 52 +++++++++++++++++++++++++++-------
 1 file changed, 41 insertions(+), 11 deletions(-)

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

diff --git a/src/exchangedb/0002-cs_nonce_locks.sql b/src/exchangedb/0002-cs_nonce_locks.sql
index d34a84c8a..effc0045f 100644
--- a/src/exchangedb/0002-cs_nonce_locks.sql
+++ b/src/exchangedb/0002-cs_nonce_locks.sql
@@ -14,40 +14,65 @@
 -- TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 --
 
-CREATE OR REPLACE FUNCTION create_table_cs_nonce_locks(
-  shard_suffix VARCHAR DEFAULT NULL
+CREATE FUNCTION create_table_cs_nonce_locks(
+  partition_suffix VARCHAR DEFAULT NULL
 )
 RETURNS VOID
 LANGUAGE plpgsql
 AS $$
 BEGIN
-
   PERFORM create_partitioned_table(
-    'CREATE TABLE IF NOT EXISTS %I'
-      '(cs_nonce_lock_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY' -- UNIQUE'
+    'CREATE TABLE %I'
+      '(cs_nonce_lock_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY'
       ',nonce BYTEA PRIMARY KEY CHECK (LENGTH(nonce)=32)'
       ',op_hash BYTEA NOT NULL CHECK (LENGTH(op_hash)=64)'
       ',max_denomination_serial INT8 NOT NULL'
     ') %s ;'
     ,'cs_nonce_locks'
     ,'PARTITION BY HASH (nonce)'
-    ,shard_suffix
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_table(
+     'ensures a Clause Schnorr client nonce is locked for use with an operation identified by a hash'
+    ,'cs_nonce_locks'
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'actual nonce submitted by the client'
+    ,'nonce'
+    ,'cs_nonce_locks'
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'hash (RC for refresh, blind coin hash for withdraw) the nonce may be used with'
+    ,'op_hash'
+    ,'cs_nonce_locks'
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'Maximum number of a CS denomination serial the nonce could be used with, for GC'
+    ,'max_denomination_serial'
+    ,'cs_nonce_locks'
+    ,partition_suffix
   );
-
 END
 $$;
 
-CREATE OR REPLACE FUNCTION add_constraints_to_cs_nonce_locks_partition(
+
+CREATE FUNCTION constrain_table_cs_nonce_locks(
   IN partition_suffix VARCHAR
 )
 RETURNS VOID
 LANGUAGE plpgsql
 AS $$
+DECLARE
+  table_name VARCHAR DEFAULT 'cs_nonce_locks';
 BEGIN
+  table_name = concat_ws('_', table_name, shard_suffix);
   EXECUTE FORMAT (
-    'ALTER TABLE cs_nonce_locks_' || partition_suffix || ' '
-      'ADD CONSTRAINT cs_nonce_locks_' || partition_suffix || '_cs_nonce_lock_serial_id_key '
-        'UNIQUE (cs_nonce_lock_serial_id)'
+    'ALTER TABLE ' || table_name ||
+    ' ADD CONSTRAINT ' || table_name || '_cs_nonce_lock_serial_id_key'
+    ' UNIQUE (cs_nonce_lock_serial_id)'
   );
 END
 $$;
@@ -64,4 +89,9 @@ INSERT INTO exchange_tables
     ,'exchange-0002'
     ,'create'
     ,TRUE
+    ,FALSE),
+    ('cs_nonce_locks'
+    ,'exchange-0002'
+    ,'constrain'
+    ,TRUE
     ,FALSE);
-- 
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