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--
-- This file is part of TALER
-- Copyright (C) 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 OR REPLACE FUNCTION exchange_do_insert_aml_decision(
IN in_h_payto BYTEA,
IN in_new_threshold taler_amount,
IN in_new_status INT4,
IN in_decision_time INT8,
IN in_justification TEXT,
IN in_decider_pub BYTEA,
IN in_decider_sig BYTEA,
IN in_notify_s TEXT,
IN in_kyc_requirements TEXT,
IN in_requirement_row INT8,
OUT out_invalid_officer BOOLEAN,
OUT out_last_date INT8)
LANGUAGE plpgsql
AS $$
BEGIN
-- Check officer is eligible to make decisions.
PERFORM
FROM aml_staff
WHERE decider_pub=in_decider_pub
AND is_active
AND NOT read_only;
IF NOT FOUND
THEN
out_invalid_officer=TRUE;
out_last_date=0;
RETURN;
END IF;
out_invalid_officer=FALSE;
-- Check no more recent decision exists.
SELECT decision_time
INTO out_last_date
FROM aml_history
WHERE h_payto=in_h_payto
ORDER BY decision_time DESC;
IF FOUND
THEN
IF out_last_date >= in_decision_time
THEN
-- Refuse to insert older decision.
RETURN;
END IF;
UPDATE aml_status
SET threshold=in_new_threshold
,status=in_new_status
,kyc_requirement=in_requirement_row
WHERE h_payto=in_h_payto;
ASSERT FOUND, 'cannot have AML decision history but no AML status';
ELSE
out_last_date = 0;
INSERT INTO aml_status
(h_payto
,threshold
,status
,kyc_requirement)
VALUES
(in_h_payto
,in_new_threshold
,in_new_status
,in_requirement_row)
ON CONFLICT (h_payto) DO
UPDATE SET
threshold=in_new_threshold
,status=in_new_status;
END IF;
INSERT INTO aml_history
(h_payto
,new_threshold
,new_status
,decision_time
,justification
,kyc_requirements
,kyc_req_row
,decider_pub
,decider_sig
) VALUES
(in_h_payto
,in_new_threshold
,in_new_status
,in_decision_time
,in_justification
,in_kyc_requirements
,in_requirement_row
,in_decider_pub
,in_decider_sig);
-- wake up taler-exchange-aggregator
IF 0 = in_new_status
THEN
INSERT INTO kyc_alerts
(h_payto
,trigger_type)
VALUES
(in_h_payto,1);
EXECUTE FORMAT (
'NOTIFY %s'
,in_notify_s);
END IF;
END $$;
COMMENT ON FUNCTION exchange_do_insert_aml_decision(BYTEA, taler_amount, INT4, INT8, TEXT, BYTEA, BYTEA, TEXT, TEXT, INT8)
IS 'Checks whether the AML officer is eligible to make AML decisions and if so inserts the decision into the table';
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