cp sql/ from GNU Taler exchange

include/sql/0002-known_coins.sql

@@ -0,0 +1,136 @@
+--
+-- This file is part of TALER
+-- Copyright (C) 2014--2022 Taler Systems SA
+--
+-- TALER is free software; you can redistribute it and/or modify it under the
+-- terms of the GNU General Public License as published by the Free Software
+-- Foundation; either version 3, or (at your option) any later version.
+--
+-- TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+-- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+-- A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License along with
+-- TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+--
+
+
+CREATE FUNCTION create_table_known_coins(
+  IN partition_suffix TEXT DEFAULT NULL
+)
+RETURNS VOID
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  table_name TEXT default 'known_coins';
+BEGIN
+  PERFORM create_partitioned_table(
+    'CREATE TABLE %I'
+      '(known_coin_id BIGINT GENERATED BY DEFAULT AS IDENTITY'
+      ',denominations_serial INT8 NOT NULL'
+      ',coin_pub BYTEA NOT NULL PRIMARY KEY CHECK (LENGTH(coin_pub)=32)'
+      ',age_commitment_hash BYTEA CHECK (LENGTH(age_commitment_hash)=32)'
+      ',denom_sig BYTEA NOT NULL'
+      ',remaining taler_amount NOT NULL DEFAULT(0,0)'
+    ') %s ;'
+    ,table_name
+    ,'PARTITION BY HASH (coin_pub)'
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_table(
+     'information about coins and their signatures, so we do not have to store the signatures more than once if a coin is involved in multiple operations'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'Denomination of the coin, determines the value of the original coin and applicable fees for coin-specific operations.'
+    ,'denominations_serial'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'EdDSA public key of the coin'
+    ,'coin_pub'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'Value of the coin that remains to be spent'
+    ,'remaining'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'Optional hash of the age commitment for age restrictions as per DD 24 (active if denom_type has the respective bit set)'
+    ,'age_commitment_hash'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'This is the signature of the exchange that affirms that the coin is a valid coin. The specific signature type depends on denom_type of the denomination.'
+    ,'denom_sig'
+    ,table_name
+    ,partition_suffix
+  );
+END
+$$;
+
+
+CREATE FUNCTION constrain_table_known_coins(
+  IN partition_suffix TEXT
+)
+RETURNS void
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  table_name TEXT default 'known_coins';
+BEGIN
+  table_name = concat_ws('_', table_name, partition_suffix);
+  EXECUTE FORMAT (
+    'ALTER TABLE ' || table_name ||
+    ' ADD CONSTRAINT ' || table_name || '_known_coin_id_key'
+    ' UNIQUE (known_coin_id)'
+  );
+END
+$$;
+
+
+CREATE FUNCTION foreign_table_known_coins()
+RETURNS void
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  table_name TEXT default 'known_coins';
+BEGIN
+  EXECUTE FORMAT (
+    'ALTER TABLE ' || table_name ||
+    ' ADD CONSTRAINT ' || table_name || '_foreign_denominations'
+    ' FOREIGN KEY (denominations_serial) '
+    ' REFERENCES denominations (denominations_serial) ON DELETE CASCADE'
+  );
+END
+$$;
+
+
+INSERT INTO exchange_tables
+    (name
+    ,version
+    ,action
+    ,partitioned
+    ,by_range)
+  VALUES
+    ('known_coins'
+    ,'exchange-0002'
+    ,'create'
+    ,TRUE
+    ,FALSE),
+    ('known_coins'
+    ,'exchange-0002'
+    ,'constrain'
+    ,TRUE
+    ,FALSE),
+    ('known_coins'
+    ,'exchange-0002'
+    ,'foreign'
+    ,TRUE
+    ,FALSE);