cp sql/ from GNU Taler exchange

include/sql/0002-contracts.sql

@@ -0,0 +1,109 @@
+--
+-- 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_contracts(
+  IN partition_suffix TEXT DEFAULT NULL
+)
+RETURNS VOID
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  table_name TEXT DEFAULT 'contracts';
+BEGIN
+  PERFORM create_partitioned_table(
+     'CREATE TABLE %I '
+     '(contract_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY'
+     ',purse_pub BYTEA NOT NULL CHECK (LENGTH(purse_pub)=32)'
+     ',pub_ckey BYTEA NOT NULL CHECK (LENGTH(pub_ckey)=32)'
+     ',contract_sig BYTEA NOT NULL CHECK (LENGTH(contract_sig)=64)'
+     ',e_contract BYTEA NOT NULL'
+     ',purse_expiration INT8 NOT NULL'
+     ',PRIMARY KEY (purse_pub)'
+     ') %s ;'
+    ,table_name
+    ,'PARTITION BY HASH (purse_pub)'
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_table(
+     'encrypted contracts associated with purses'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'public key of the purse that the contract is associated with'
+    ,'purse_pub'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'signature over the encrypted contract by the purse contract key'
+    ,'contract_sig'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'Public ECDH key used to encrypt the contract, to be used with the purse private key for decryption'
+    ,'pub_ckey'
+    ,table_name
+    ,partition_suffix
+  );
+  PERFORM comment_partitioned_column(
+     'AES-GCM encrypted contract terms (contains gzip compressed JSON after decryption)'
+    ,'e_contract'
+    ,table_name
+    ,partition_suffix
+  );
+END
+$$;
+
+
+CREATE FUNCTION constrain_table_contracts(
+  IN partition_suffix TEXT
+)
+RETURNS VOID
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  table_name TEXT DEFAULT 'contracts';
+BEGIN
+  table_name = concat_ws('_', table_name, partition_suffix);
+  EXECUTE FORMAT (
+    'ALTER TABLE ' || table_name ||
+    ' ADD CONSTRAINT ' || table_name || '_contract_serial_id_key'
+    ' UNIQUE (contract_serial_id) '
+  );
+END
+$$;
+
+
+INSERT INTO exchange_tables
+    (name
+    ,version
+    ,action
+    ,partitioned
+    ,by_range)
+  VALUES
+    ('contracts'
+    ,'exchange-0002'
+    ,'create'
+    ,TRUE
+    ,FALSE),
+    ('contracts'
+    ,'exchange-0002'
+    ,'constrain'
+    ,TRUE
+    ,FALSE);