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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 OR REPLACE FUNCTION exchange_do_batch_withdraw_insert(
IN cs_nonce BYTEA,
IN amount_val INT8,
IN amount_frac INT4,
IN h_denom_pub BYTEA,
IN ruuid INT8,
IN reserve_sig BYTEA,
IN h_coin_envelope BYTEA,
IN denom_sig BYTEA,
IN now INT8,
OUT out_denom_unknown BOOLEAN,
OUT out_nonce_reuse BOOLEAN,
OUT out_conflict BOOLEAN)
LANGUAGE plpgsql
AS $$
DECLARE
denom_serial INT8;
BEGIN
-- Shards: reserves by reserve_pub (SELECT)
-- reserves_out (INSERT, with CONFLICT detection) by wih
-- reserves by reserve_pub (UPDATE)
-- reserves_in by reserve_pub (SELECT)
-- wire_targets by wire_target_h_payto
out_denom_unknown=TRUE;
out_conflict=TRUE;
out_nonce_reuse=TRUE;
SELECT denominations_serial
INTO denom_serial
FROM exchange.denominations
WHERE denom_pub_hash=h_denom_pub;
IF NOT FOUND
THEN
-- denomination unknown, should be impossible!
out_denom_unknown=TRUE;
ASSERT false, 'denomination unknown';
RETURN;
END IF;
out_denom_unknown=FALSE;
INSERT INTO exchange.reserves_out
(h_blind_ev
,denominations_serial
,denom_sig
,reserve_uuid
,reserve_sig
,execution_date
,amount_with_fee_val
,amount_with_fee_frac)
VALUES
(h_coin_envelope
,denom_serial
,denom_sig
,ruuid
,reserve_sig
,now
,amount_val
,amount_frac)
ON CONFLICT DO NOTHING;
IF NOT FOUND
THEN
out_conflict=TRUE;
RETURN;
END IF;
out_conflict=FALSE;
-- Special actions needed for a CS withdraw?
out_nonce_reuse=FALSE;
IF NOT NULL cs_nonce
THEN
-- Cache CS signature to prevent replays in the future
-- (and check if cached signature exists at the same time).
INSERT INTO exchange.cs_nonce_locks
(nonce
,max_denomination_serial
,op_hash)
VALUES
(cs_nonce
,denom_serial
,h_coin_envelope)
ON CONFLICT DO NOTHING;
IF NOT FOUND
THEN
-- See if the existing entry is identical.
SELECT 1
FROM exchange.cs_nonce_locks
WHERE nonce=cs_nonce
AND op_hash=h_coin_envelope;
IF NOT FOUND
THEN
out_nonce_reuse=TRUE;
ASSERT false, 'nonce reuse attempted by client';
RETURN;
END IF;
END IF;
END IF;
END $$;
COMMENT ON FUNCTION exchange_do_batch_withdraw_insert(BYTEA, INT8, INT4, BYTEA, INT8, BYTEA, BYTEA, BYTEA, INT8)
IS 'Stores information about a planchet for a batch withdraw operation. Checks if the planchet already exists, and in that case indicates a conflict';
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