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authorChristian Grothoff <christian@grothoff.org>2022-12-27 20:36:58 +0100
committerChristian Grothoff <christian@grothoff.org>2022-12-27 20:36:58 +0100
commit26624bed95aaa29dcea00095e167f3d9ec0a129e (patch)
tree2481b56694b678af57d6adb5a53507d5caf278c3 /src
parent8d0bf81801acfca1b2007b8300bf80deafed5a00 (diff)
-purse deletion SQL logic
Diffstat (limited to 'src')
-rw-r--r--src/exchangedb/exchange_do_delete_purse.sql109
-rw-r--r--src/exchangedb/procedures.sql.in1
2 files changed, 110 insertions, 0 deletions
diff --git a/src/exchangedb/exchange_do_delete_purse.sql b/src/exchangedb/exchange_do_delete_purse.sql
new file mode 100644
index 000000000..3d493e624
--- /dev/null
+++ b/src/exchangedb/exchange_do_delete_purse.sql
@@ -0,0 +1,109 @@
+--
+-- 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_delete_purse(
+ IN in_purse_pub BYTEA,
+ IN in_purse_sig BYTEA,
+ IN in_now INT8,
+ OUT out_decided BOOLEAN,
+ OUT out_found BOOLEAN)
+LANGUAGE plpgsql
+AS $$
+DECLARE
+ my_deposit record;
+DECLARE
+ my_in_reserve_quota BOOLEAN;
+BEGIN
+
+SELECT COUNT(*) FROM purse_decision
+ WHERE purse_pub=in_purse_pub;
+IF FOUND
+THEN
+ out_found=TRUE;
+ out_decided=TRUE;
+ RETURN;
+END IF;
+out_decided=FALSE;
+
+SELECT in_reserve_quota
+ INTO my_in_reserve_quota
+ FROM exchange.purse_requests
+ WHERE purse_pub=in_purse_pub;
+out_found=FOUND;
+IF NOT FOUND
+THEN
+ RETURN;
+END IF;
+
+-- store reserve deletion
+INSERT INTO purse_deletion
+ (purse_pub
+ ,purse_sig)
+VALUES
+ (in_purse_pub
+ ,in_purse_sig);
+
+-- store purse decision
+INSERT INTO purse_decision
+ (purse_pub
+ ,action_timestamp
+ ,refunded)
+VALUES
+ (in_purse_pub
+ ,in_now
+ ,TRUE);
+
+-- update purse quota at reserve
+IF (my_in_reserve_quota)
+THEN
+ UPDATE reserves
+ SET purses_active=purses_active-1
+ WHERE reserve_pub IN
+ (SELECT reserve_pub
+ FROM exchange.purse_merges
+ WHERE purse_pub=in_purse_pub
+ LIMIT 1);
+END IF;
+
+-- restore balance to each coin deposited into the purse
+FOR my_deposit IN
+ SELECT coin_pub
+ ,amount_with_fee_val
+ ,amount_with_fee_frac
+ FROM exchange.purse_deposits
+ WHERE purse_pub = in_purse_pub
+LOOP
+ UPDATE exchange.known_coins SET
+ remaining_frac=remaining_frac+my_deposit.amount_with_fee_frac
+ - CASE
+ WHEN remaining_frac+my_deposit.amount_with_fee_frac >= 100000000
+ THEN 100000000
+ ELSE 0
+ END,
+ remaining_val=remaining_val+my_deposit.amount_with_fee_val
+ + CASE
+ WHEN remaining_frac+my_deposit.amount_with_fee_frac >= 100000000
+ THEN 1
+ ELSE 0
+ END
+ WHERE coin_pub = my_deposit.coin_pub;
+END LOOP;
+
+
+END $$;
+
+COMMENT ON FUNCTION exchange_do_delete_purse(BYTEA,BYTEA,INT8)
+ IS 'Delete a previously undecided purse and refund the coins (if any).';
diff --git a/src/exchangedb/procedures.sql.in b/src/exchangedb/procedures.sql.in
index b775639bf..fb12fbae5 100644
--- a/src/exchangedb/procedures.sql.in
+++ b/src/exchangedb/procedures.sql.in
@@ -31,6 +31,7 @@ SET search_path TO exchange;
#include "exchange_do_purse_deposit.sql"
#include "exchange_do_reserve_purse.sql"
#include "exchange_do_expire_purse.sql"
+#include "exchange_do_delete_purse.sql"
#include "exchange_do_history_request.sql"
#include "exchange_do_reserve_open_deposit.sql"
#include "exchange_do_reserve_open.sql"