cp sql/ from GNU Taler exchange

include/sql/exchange_do_deposit.sql

@@ -0,0 +1,222 @@
+--
+-- This file is part of TALER
+-- Copyright (C) 2014--2025 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/>
+--
+
+DROP FUNCTION IF EXISTS exchange_do_deposit;
+CREATE FUNCTION exchange_do_deposit(
+  -- For batch_deposits
+  IN in_shard INT8,
+  IN in_merchant_pub BYTEA,
+  IN in_merchant_sig BYTEA,
+  IN in_wallet_timestamp INT8,
+  IN in_exchange_timestamp INT8,
+  IN in_refund_deadline INT8,
+  IN in_wire_deadline INT8,
+  IN in_h_contract_terms BYTEA,
+  IN in_wallet_data_hash BYTEA, -- can be NULL
+  IN in_wire_salt BYTEA,
+  IN in_wire_target_h_payto BYTEA,
+  IN in_h_normalized_payto BYTEA,
+  IN in_policy_details_serial_id INT8, -- can be NULL
+  IN in_policy_blocked BOOLEAN,
+  -- For wire_targets
+  IN in_receiver_wire_account TEXT,
+  -- For coin_deposits
+  IN ina_coin_pub BYTEA[],
+  IN ina_coin_sig BYTEA[],
+  IN ina_amount_with_fee taler_amount[],
+  IN in_total_amount taler_amount,
+  IN in_is_wallet BOOL,
+  OUT out_exchange_timestamp INT8,
+  OUT out_insufficient_balance_coin_index INT4, -- index of coin with bad balance, NULL if none
+  OUT out_conflict BOOL
+ )
+LANGUAGE plpgsql
+AS $$
+DECLARE
+  wtsi INT8; -- wire target serial id
+  bdsi INT8; -- batch_deposits serial id
+  i INT4;
+  ini_amount_with_fee taler_amount;
+  ini_coin_pub BYTEA;
+  ini_coin_sig BYTEA;
+BEGIN
+-- Shards:
+--         INSERT wire_targets (by h_payto), ON CONFLICT DO NOTHING;
+--         INSERT batch_deposits (by shard, merchant_pub), ON CONFLICT idempotency check;
+--         INSERT[] coin_deposits (by coin_pub), ON CONFLICT idempotency check;
+--         UPDATE[] known_coins (by coin_pub)
+
+
+-- Make sure the kyc_target entry exists
+INSERT INTO kyc_targets
+  (h_normalized_payto
+  ,is_wallet
+  ) VALUES (
+   in_h_normalized_payto
+  ,in_is_wallet
+  )
+  ON CONFLICT DO NOTHING;
+
+-- First, get or create the 'wtsi'
+INSERT INTO wire_targets
+  (wire_target_h_payto
+  ,h_normalized_payto
+  ,payto_uri
+  ) VALUES (
+   in_wire_target_h_payto
+  ,in_h_normalized_payto
+  ,in_receiver_wire_account
+  )
+  ON CONFLICT DO NOTHING -- for CONFLICT ON (wire_target_h_payto)
+  RETURNING wire_target_serial_id
+       INTO wtsi;
+
+IF NOT FOUND
+THEN
+  SELECT wire_target_serial_id
+    INTO wtsi
+    FROM wire_targets
+   WHERE wire_target_h_payto=in_wire_target_h_payto;
+END IF;
+
+
+-- Second, create the batch_deposits entry
+INSERT INTO batch_deposits
+  (shard
+  ,merchant_pub
+  ,merchant_sig
+  ,wallet_timestamp
+  ,exchange_timestamp
+  ,refund_deadline
+  ,wire_deadline
+  ,h_contract_terms
+  ,wallet_data_hash
+  ,wire_salt
+  ,wire_target_h_payto
+  ,policy_details_serial_id
+  ,policy_blocked
+  ,total_amount
+  ) VALUES (
+   in_shard
+  ,in_merchant_pub
+  ,in_merchant_sig
+  ,in_wallet_timestamp
+  ,in_exchange_timestamp
+  ,in_refund_deadline
+  ,in_wire_deadline
+  ,in_h_contract_terms
+  ,in_wallet_data_hash
+  ,in_wire_salt
+  ,in_wire_target_h_payto
+  ,in_policy_details_serial_id
+  ,in_policy_blocked
+  ,in_total_amount)
+  ON CONFLICT DO NOTHING -- for CONFLICT ON (merchant_pub, h_contract_terms)
+  RETURNING
+    batch_deposit_serial_id
+  INTO
+    bdsi;
+
+IF NOT FOUND
+THEN
+  -- Idempotency check: see if an identical record exists.
+  -- We do select over merchant_pub, h_contract_terms and wire_target_h_payto
+  -- first to maximally increase the chance of using the existing index.
+  SELECT
+      exchange_timestamp
+     ,batch_deposit_serial_id
+   INTO
+      out_exchange_timestamp
+     ,bdsi
+   FROM batch_deposits
+   WHERE shard=in_shard
+     AND merchant_pub=in_merchant_pub
+     AND h_contract_terms=in_h_contract_terms
+     AND wire_target_h_payto=in_wire_target_h_payto
+     -- now check the rest, too
+     AND ( (wallet_data_hash=in_wallet_data_hash) OR
+           (wallet_data_hash IS NULL AND in_wallet_data_hash IS NULL) )
+     AND wire_salt=in_wire_salt
+     AND wallet_timestamp=in_wallet_timestamp
+     AND refund_deadline=in_refund_deadline
+     AND wire_deadline=in_wire_deadline
+     AND ( (policy_details_serial_id=in_policy_details_serial_id) OR
+           (policy_details_serial_id IS NULL AND in_policy_details_serial_id IS NULL) );
+  IF NOT FOUND
+  THEN
+    -- Deposit exists, but with *strange* differences. Not allowed.
+    out_conflict=TRUE;
+    RETURN;
+  END IF;
+END IF;
+
+out_conflict=FALSE;
+
+-- Deposit each coin
+
+FOR i IN 1..array_length(ina_coin_pub,1)
+LOOP
+  ini_coin_pub = ina_coin_pub[i];
+  ini_coin_sig = ina_coin_sig[i];
+  ini_amount_with_fee = ina_amount_with_fee[i];
+
+  INSERT INTO coin_deposits
+    (batch_deposit_serial_id
+    ,coin_pub
+    ,coin_sig
+    ,amount_with_fee
+    ) VALUES (
+     bdsi
+    ,ini_coin_pub
+    ,ini_coin_sig
+    ,ini_amount_with_fee
+    )
+    ON CONFLICT DO NOTHING;
+
+  IF FOUND
+  THEN
+    -- Insert did happen, update balance in known_coins!
+
+    UPDATE known_coins kc
+      SET
+        remaining.frac=(kc.remaining).frac-ini_amount_with_fee.frac
+          + CASE
+              WHEN (kc.remaining).frac < ini_amount_with_fee.frac
+              THEN 100000000
+              ELSE 0
+            END,
+        remaining.val=(kc.remaining).val-ini_amount_with_fee.val
+          - CASE
+              WHEN (kc.remaining).frac < ini_amount_with_fee.frac
+              THEN 1
+              ELSE 0
+            END
+      WHERE coin_pub=ini_coin_pub
+        AND ( ((kc.remaining).val > ini_amount_with_fee.val) OR
+              ( ((kc.remaining).frac >= ini_amount_with_fee.frac) AND
+                ((kc.remaining).val >= ini_amount_with_fee.val) ) );
+
+    IF NOT FOUND
+    THEN
+      -- Insufficient balance.
+      -- Note: C arrays are 0 indexed, but i started at 1
+      out_insufficient_balance_coin_index=i-1;
+      RETURN;
+    END IF;
+  END IF;
+END LOOP; -- end FOR all coins
+
+END $$;