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--
-- This file is part of TALER
-- Copyright (C) 2014--2023 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_recoup_refresh(
IN partition_suffix TEXT DEFAULT NULL
)
RETURNS VOID
LANGUAGE plpgsql
AS $$
DECLARE
table_name TEXT DEFAULT 'recoup_refresh';
BEGIN
PERFORM create_partitioned_table(
'CREATE TABLE %I'
'(recoup_refresh_uuid BIGINT GENERATED BY DEFAULT AS IDENTITY'
',coin_pub BYTEA NOT NULL CHECK (LENGTH(coin_pub)=32)'
',known_coin_id BIGINT NOT NULL'
',coin_sig BYTEA NOT NULL CHECK(LENGTH(coin_sig)=64)'
',coin_blind BYTEA NOT NULL CHECK(LENGTH(coin_blind)=32)'
',amount taler_amount NOT NULL'
',recoup_timestamp INT8 NOT NULL'
',rrc_serial INT8 NOT NULL'
') %s ;'
,table_name
,'PARTITION BY HASH (coin_pub)'
,partition_suffix
);
PERFORM comment_partitioned_table(
'Table of coins that originated from a refresh operation and that were recouped. Links the (fresh) coin to the melted operation (and thus the old coin). A recoup on a refreshed coin credits the old coin and debits the fresh coin.'
,table_name
,partition_suffix
);
PERFORM comment_partitioned_column(
'Refreshed coin of a revoked denomination where the residual value is credited to the old coin. Do not CASCADE ON DROP on the coin_pub, as we may keep the coin alive!'
,'coin_pub'
,table_name
,partition_suffix
);
PERFORM comment_partitioned_column(
'FIXME: (To be) used for garbage collection (in the absence of foreign constraints, in the future)'
,'known_coin_id'
,table_name
,partition_suffix
);
PERFORM comment_partitioned_column(
'Link to the refresh operation. Also identifies the h_blind_ev of the recouped coin (as h_coin_ev).'
,'rrc_serial'
,table_name
,partition_suffix
);
PERFORM comment_partitioned_column(
'Denomination blinding key used when creating the blinded coin from the planchet. Secret revealed during the recoup to provide the linkage between the coin and the refresh operation.'
,'coin_blind'
,table_name
,partition_suffix
);
END
$$;
CREATE FUNCTION constrain_table_recoup_refresh(
IN partition_suffix TEXT
)
RETURNS VOID
LANGUAGE plpgsql
AS $$
DECLARE
table_name TEXT DEFAULT 'recoup_refresh';
BEGIN
table_name = concat_ws('_', table_name, partition_suffix);
-- FIXME: any query using this index will be slow. Materialize index or change query?
-- Also: which query uses this index?
EXECUTE FORMAT (
'CREATE INDEX ' || table_name || '_by_rrc_serial_index'
' ON ' || table_name || ' '
'(rrc_serial);'
);
EXECUTE FORMAT (
'CREATE INDEX ' || table_name || '_by_coin_pub_index'
' ON ' || table_name || ' '
'(coin_pub);'
);
EXECUTE FORMAT (
'ALTER TABLE ' || table_name ||
' ADD CONSTRAINT ' || table_name || '_recoup_refresh_uuid_key'
' UNIQUE (recoup_refresh_uuid) '
);
END
$$;
CREATE FUNCTION foreign_table_recoup_refresh()
RETURNS VOID
LANGUAGE plpgsql
AS $$
DECLARE
table_name TEXT DEFAULT 'recoup_refresh';
BEGIN
EXECUTE FORMAT (
'ALTER TABLE ' || table_name ||
' ADD CONSTRAINT ' || table_name || '_foreign_coin_pub'
' FOREIGN KEY (coin_pub) '
' REFERENCES known_coins (coin_pub)'
',ADD CONSTRAINT ' || table_name || '_foreign_known_coin_id'
' FOREIGN KEY (known_coin_id) '
' REFERENCES known_coins (known_coin_id) ON DELETE CASCADE'
',ADD CONSTRAINT ' || table_name || '_foreign_rrc_serial'
' FOREIGN KEY (rrc_serial) '
' REFERENCES refresh_revealed_coins (rrc_serial) ON DELETE CASCADE'
);
END
$$;
CREATE OR REPLACE FUNCTION recoup_refresh_insert_trigger()
RETURNS trigger
LANGUAGE plpgsql
AS $$
BEGIN
INSERT INTO exchange.coin_history
(coin_pub
,table_name
,serial_id)
VALUES
(NEW.coin_pub
,'recoup_refresh::NEW'
,NEW.recoup_refresh_uuid);
INSERT INTO exchange.coin_history
(coin_pub
,table_name
,serial_id)
SELECT
melt.old_coin_pub
,'recoup_refresh::OLD'
,NEW.recoup_refresh_uuid
FROM refresh_revealed_coins rrc
JOIN refresh_commitments melt
USING (melt_serial_id)
WHERE rrc.rrc_serial = NEW.rrc_serial;
RETURN NEW;
END $$;
COMMENT ON FUNCTION coin_deposits_insert_trigger()
IS 'Automatically generate coin history entry.';
CREATE FUNCTION master_table_recoup_refresh()
RETURNS VOID
LANGUAGE plpgsql
AS $$
BEGIN
CREATE TRIGGER recoup_refresh_on_insert
AFTER INSERT
ON recoup_refresh
FOR EACH ROW EXECUTE FUNCTION recoup_refresh_insert_trigger();
END $$;
INSERT INTO exchange_tables
(name
,version
,action
,partitioned
,by_range)
VALUES
('recoup_refresh'
,'exchange-0002'
,'create'
,TRUE
,FALSE),
('recoup_refresh'
,'exchange-0002'
,'constrain'
,TRUE
,FALSE),
('recoup_refresh'
,'exchange-0002'
,'foreign'
,TRUE
,FALSE),
('recoup_refresh'
,'exchange-0002'
,'master'
,TRUE
,FALSE);
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