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--
-- 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);
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