225 lines
7.2 KiB
C
225 lines
7.2 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2022 Taler Systems SA
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file exchangedb/pg_select_refunds_above_serial_id.c
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* @brief Implementation of the select_refunds_above_serial_id function for Postgres
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include "taler_error_codes.h"
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#include "taler_dbevents.h"
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#include "taler_pq_lib.h"
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#include "pg_select_refunds_above_serial_id.h"
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#include "pg_helper.h"
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/**
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* Closure for #refunds_serial_helper_cb().
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*/
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struct RefundsSerialContext
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{
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/**
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* Callback to call.
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*/
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TALER_EXCHANGEDB_RefundCallback cb;
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/**
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* Closure for @e cb.
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*/
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void *cb_cls;
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/**
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* Plugin context.
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*/
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struct PostgresClosure *pg;
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/**
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* Status code, set to #GNUNET_SYSERR on hard errors.
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*/
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enum GNUNET_GenericReturnValue status;
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};
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/**
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* Helper function to be called with the results of a SELECT statement
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* that has returned @a num_results results.
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*
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* @param cls closure of type `struct RefundsSerialContext`
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* @param result the postgres result
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* @param num_results the number of results in @a result
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*/
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static void
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refunds_serial_helper_cb (void *cls,
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PGresult *result,
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unsigned int num_results)
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{
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struct RefundsSerialContext *rsc = cls;
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struct PostgresClosure *pg = rsc->pg;
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for (unsigned int i = 0; i<num_results; i++)
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{
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struct TALER_EXCHANGEDB_Refund refund;
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struct TALER_DenominationPublicKey denom_pub;
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uint64_t rowid;
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bool full_refund;
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struct GNUNET_PQ_ResultSpec rs[] = {
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GNUNET_PQ_result_spec_auto_from_type ("merchant_pub",
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&refund.details.merchant_pub),
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GNUNET_PQ_result_spec_auto_from_type ("merchant_sig",
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&refund.details.merchant_sig),
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GNUNET_PQ_result_spec_auto_from_type ("h_contract_terms",
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&refund.details.h_contract_terms),
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GNUNET_PQ_result_spec_uint64 ("rtransaction_id",
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&refund.details.rtransaction_id),
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TALER_PQ_result_spec_denom_pub ("denom_pub",
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&denom_pub),
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GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
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&refund.coin.coin_pub),
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TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
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&refund.details.refund_amount),
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GNUNET_PQ_result_spec_uint64 ("refund_serial_id",
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&rowid),
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GNUNET_PQ_result_spec_end
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};
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enum GNUNET_GenericReturnValue ret;
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if (GNUNET_OK !=
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GNUNET_PQ_extract_result (result,
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rs,
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i))
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{
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GNUNET_break (0);
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rsc->status = GNUNET_SYSERR;
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return;
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}
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{
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struct GNUNET_PQ_QueryParam params[] = {
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GNUNET_PQ_query_param_uint64 (&rowid),
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GNUNET_PQ_query_param_end
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};
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struct TALER_Amount amount_with_fee;
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uint64_t s_f;
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uint64_t s_v;
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struct GNUNET_PQ_ResultSpec rs2[] = {
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GNUNET_PQ_result_spec_uint64 ("s_v",
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&s_v),
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GNUNET_PQ_result_spec_uint64 ("s_f",
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&s_f),
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TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
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&amount_with_fee),
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GNUNET_PQ_result_spec_end
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};
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enum GNUNET_DB_QueryStatus qs;
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qs = GNUNET_PQ_eval_prepared_singleton_select (
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pg->conn,
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"test_refund_full",
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params,
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rs2);
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if (qs <= 0)
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{
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GNUNET_break (0);
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rsc->status = GNUNET_SYSERR;
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return;
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}
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/* normalize */
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s_v += s_f / TALER_AMOUNT_FRAC_BASE;
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s_f %= TALER_AMOUNT_FRAC_BASE;
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full_refund = (s_v >= amount_with_fee.value) &&
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(s_f >= amount_with_fee.fraction);
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}
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ret = rsc->cb (rsc->cb_cls,
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rowid,
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&denom_pub,
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&refund.coin.coin_pub,
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&refund.details.merchant_pub,
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&refund.details.merchant_sig,
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&refund.details.h_contract_terms,
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refund.details.rtransaction_id,
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full_refund,
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&refund.details.refund_amount);
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GNUNET_PQ_cleanup_result (rs);
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if (GNUNET_OK != ret)
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break;
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}
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}
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enum GNUNET_DB_QueryStatus
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TEH_PG_select_refunds_above_serial_id (
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void *cls,
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uint64_t serial_id,
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TALER_EXCHANGEDB_RefundCallback cb,
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void *cb_cls)
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{
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struct PostgresClosure *pg = cls;
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struct GNUNET_PQ_QueryParam params[] = {
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GNUNET_PQ_query_param_uint64 (&serial_id),
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GNUNET_PQ_query_param_end
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};
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struct RefundsSerialContext rsc = {
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.cb = cb,
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.cb_cls = cb_cls,
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.pg = pg,
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.status = GNUNET_OK
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};
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enum GNUNET_DB_QueryStatus qs;
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/* Fetch refunds with rowid '\geq' the given parameter */
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PREPARE (pg,
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"audit_get_refunds_incr",
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"SELECT"
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" dep.merchant_pub"
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",ref.merchant_sig"
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",dep.h_contract_terms"
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",ref.rtransaction_id"
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",denom.denom_pub"
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",kc.coin_pub"
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",ref.amount_with_fee_val"
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",ref.amount_with_fee_frac"
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",ref.refund_serial_id"
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" FROM refunds ref"
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" JOIN deposits dep"
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" ON (ref.coin_pub=dep.coin_pub AND ref.deposit_serial_id=dep.deposit_serial_id)"
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" JOIN known_coins kc"
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" ON (dep.coin_pub=kc.coin_pub)"
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" JOIN denominations denom"
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" ON (kc.denominations_serial=denom.denominations_serial)"
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" WHERE ref.refund_serial_id>=$1"
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" ORDER BY ref.refund_serial_id ASC;");
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PREPARE (pg,
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"test_refund_full",
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"SELECT"
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" CAST(SUM(CAST(ref.amount_with_fee_frac AS INT8)) AS INT8) AS s_f"
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",CAST(SUM(ref.amount_with_fee_val) AS INT8) AS s_v"
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",dep.amount_with_fee_val"
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",dep.amount_with_fee_frac"
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" FROM refunds ref"
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" JOIN deposits dep"
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" ON (ref.coin_pub=dep.coin_pub AND ref.deposit_serial_id=dep.deposit_serial_id)"
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" WHERE ref.refund_serial_id=$1"
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" GROUP BY (dep.amount_with_fee_val, dep.amount_with_fee_frac);");
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qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
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"audit_get_refunds_incr",
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params,
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&refunds_serial_helper_cb,
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&rsc);
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if (GNUNET_OK != rsc.status)
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return GNUNET_DB_STATUS_HARD_ERROR;
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return qs;
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}
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