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Diffstat (limited to 'src/exchangedb/0002-refunds.sql')
-rw-r--r-- | src/exchangedb/0002-refunds.sql | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/exchangedb/0002-refunds.sql b/src/exchangedb/0002-refunds.sql new file mode 100644 index 000000000..2a40bc192 --- /dev/null +++ b/src/exchangedb/0002-refunds.sql @@ -0,0 +1,162 @@ +-- +-- 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_refunds( + IN partition_suffix TEXT DEFAULT NULL +) +RETURNS VOID +LANGUAGE plpgsql +AS $$ +DECLARE + table_name TEXT DEFAULT 'refunds'; +BEGIN + PERFORM create_partitioned_table( + 'CREATE TABLE %I' + '(refund_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY' + ',coin_pub BYTEA NOT NULL CHECK (LENGTH(coin_pub)=32)' + ',batch_deposit_serial_id INT8 NOT NULL' + ',merchant_sig BYTEA NOT NULL CHECK(LENGTH(merchant_sig)=64)' + ',rtransaction_id INT8 NOT NULL' + ',amount_with_fee taler_amount NOT NULL' + ') %s ;' + ,table_name + ,'PARTITION BY HASH (coin_pub)' + ,partition_suffix + ); + PERFORM comment_partitioned_table( + 'Data on coins that were refunded. Technically, refunds always apply against specific deposit operations involving a coin. The combination of coin_pub, merchant_pub, h_contract_terms and rtransaction_id MUST be unique, and we usually select by coin_pub so that one goes first.' + ,table_name + ,partition_suffix + ); + PERFORM comment_partitioned_column( + 'Identifies ONLY the merchant_pub, h_contract_terms and coin_pub. Multiple deposits may match a refund, this only identifies one of them.' + ,'batch_deposit_serial_id' + ,table_name + ,partition_suffix + ); + PERFORM comment_partitioned_column( + 'used by the merchant to make refunds unique in case the same coin for the same deposit gets a subsequent (higher) refund' + ,'rtransaction_id' + ,table_name + ,partition_suffix + ); +END +$$; + + +CREATE FUNCTION constrain_table_refunds ( + IN partition_suffix TEXT DEFAULT NULL +) +RETURNS void +LANGUAGE plpgsql +AS $$ +DECLARE + table_name TEXT DEFAULT 'refunds'; +BEGIN + table_name = concat_ws('_', table_name, partition_suffix); + EXECUTE FORMAT ( + 'CREATE INDEX ' || table_name || '_by_coin_pub_index ' + 'ON ' || table_name || ' ' + '(coin_pub);' + ); + EXECUTE FORMAT ( + 'ALTER TABLE ' || table_name || + ' ADD CONSTRAINT ' || table_name || '_refund_serial_id_key' + ' UNIQUE (refund_serial_id) ' + ',ADD PRIMARY KEY (batch_deposit_serial_id, rtransaction_id) ' + ); +END +$$; + + +CREATE FUNCTION foreign_table_refunds () +RETURNS void +LANGUAGE plpgsql +AS $$ +DECLARE + table_name TEXT DEFAULT 'refunds'; +BEGIN + EXECUTE FORMAT ( + 'ALTER TABLE ' || table_name || + ' ADD CONSTRAINT ' || table_name || '_foreign_coin_pub' + ' FOREIGN KEY (coin_pub) ' + ' REFERENCES known_coins (coin_pub) ON DELETE CASCADE' + ',ADD CONSTRAINT ' || table_name || '_foreign_deposit' + ' FOREIGN KEY (batch_deposit_serial_id) ' + ' REFERENCES batch_deposits (batch_deposit_serial_id) ON DELETE CASCADE' + ); +END +$$; + + +CREATE OR REPLACE FUNCTION refunds_insert_trigger() + RETURNS trigger + LANGUAGE plpgsql + AS $$ +BEGIN + INSERT INTO exchange.coin_history + (coin_pub + ,table_name + ,serial_id) + VALUES + (NEW.coin_pub + ,'refunds' + ,NEW.refund_serial_id); + RETURN NEW; +END $$; +COMMENT ON FUNCTION refunds_insert_trigger() + IS 'Automatically generate coin history entry.'; + + +CREATE FUNCTION master_table_refunds() +RETURNS VOID +LANGUAGE plpgsql +AS $$ +BEGIN + CREATE TRIGGER refunds_on_insert + AFTER INSERT + ON refunds + FOR EACH ROW EXECUTE FUNCTION refunds_insert_trigger(); +END $$; + + +INSERT INTO exchange_tables + (name + ,version + ,action + ,partitioned + ,by_range) + VALUES + ('refunds' + ,'exchange-0002' + ,'create' + ,TRUE + ,FALSE), + ('refunds' + ,'exchange-0002' + ,'constrain' + ,TRUE + ,FALSE), + ('refunds' + ,'exchange-0002' + ,'foreign' + ,TRUE + ,FALSE), + ('refunds' + ,'exchange-0002' + ,'master' + ,TRUE + ,FALSE); |