Line data Source code
1 : /*
2 : This file is part of GNU Taler
3 : Copyright (C) 2024, 2025 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify it under the
6 : terms of the GNU General Public License as published by the Free Software
7 : Foundation; either version 3, or (at your option) any later version.
8 :
9 : TALER is distributed in the hope that it will be useful, but WITHOUT ANY
10 : WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11 : A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12 :
13 : You should have received a copy of the GNU General Public License along with
14 : TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
15 : */
16 : /**
17 : * @file src/util/contract_choice_serialize.c
18 : * @brief shared logic for contract choice serialization
19 : * @author Iván Ávalos
20 : * @author Christian Grothoff
21 : */
22 : #include "platform.h"
23 : #include <gnunet/gnunet_json_lib.h>
24 : #include <gnunet/gnunet_common.h>
25 : #include <taler/taler_json_lib.h>
26 : #include <jansson.h>
27 : #include "taler/taler_util.h"
28 : #include "taler/taler_merchant_util.h"
29 :
30 : /**
31 : * Get JSON representation of contract choice input.
32 : *
33 : * @param[in] input contract terms choice input
34 : * @return JSON representation of @a input; NULL on error
35 : */
36 : static json_t *
37 6 : json_from_contract_input (
38 : const struct TALER_MERCHANT_ContractInput *input)
39 : {
40 6 : switch (input->type)
41 : {
42 0 : case TALER_MERCHANT_CONTRACT_INPUT_TYPE_INVALID:
43 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
44 : "invalid contract input type");
45 0 : GNUNET_assert (0);
46 : return NULL;
47 6 : case TALER_MERCHANT_CONTRACT_INPUT_TYPE_TOKEN:
48 6 : return GNUNET_JSON_PACK (
49 : GNUNET_JSON_pack_string ("type",
50 : "token"),
51 : GNUNET_JSON_pack_string ("token_family_slug",
52 : input->details.token.token_family_slug),
53 : GNUNET_JSON_pack_uint64 ("count",
54 : input->details.token.count));
55 : }
56 :
57 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
58 : "unsupported contract input type %d",
59 : input->type);
60 0 : GNUNET_assert (0);
61 : return NULL;
62 : }
63 :
64 :
65 : /**
66 : * Get JSON representation of contract choice output.
67 : *
68 : * @param[in] output contract terms choice output
69 : * @return JSON representation of @a output; NULL on error
70 : */
71 : static json_t *
72 12 : json_from_contract_output (
73 : const struct TALER_MERCHANT_ContractOutput *output)
74 : {
75 12 : switch (output->type)
76 : {
77 0 : case TALER_MERCHANT_CONTRACT_OUTPUT_TYPE_INVALID:
78 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
79 : "invalid contract output type");
80 0 : GNUNET_assert (0);
81 : return NULL;
82 9 : case TALER_MERCHANT_CONTRACT_OUTPUT_TYPE_TOKEN:
83 9 : return GNUNET_JSON_PACK (
84 : GNUNET_JSON_pack_string ("type",
85 : "token"),
86 : GNUNET_JSON_pack_string ("token_family_slug",
87 : output->details.token.token_family_slug),
88 : GNUNET_JSON_pack_uint64 ("count",
89 : output->details.token.count),
90 : GNUNET_JSON_pack_conditional (
91 : ! GNUNET_TIME_absolute_is_zero (output->details.token.valid_at.abs_time),
92 : GNUNET_JSON_pack_timestamp ("valid_at",
93 : output->details.token.valid_at)),
94 : GNUNET_JSON_pack_uint64 ("key_index",
95 : output->details.token.key_index));
96 3 : case TALER_MERCHANT_CONTRACT_OUTPUT_TYPE_DONATION_RECEIPT:
97 : {
98 : json_t *donau_urls;
99 :
100 3 : donau_urls = json_array ();
101 3 : GNUNET_assert (NULL != donau_urls);
102 3 : for (unsigned i = 0;
103 8 : i < output->details.donation_receipt.donau_urls_len;
104 5 : i++)
105 5 : GNUNET_assert (0 ==
106 : json_array_append_new (
107 : donau_urls,
108 : json_string (
109 : output->details.donation_receipt.donau_urls[i])));
110 :
111 3 : return GNUNET_JSON_PACK (
112 : GNUNET_JSON_pack_string ("type",
113 : "tax-receipt"),
114 : GNUNET_JSON_pack_array_steal ("donau_urls",
115 : donau_urls),
116 : TALER_JSON_pack_amount ("amount",
117 : &output->details.donation_receipt.amount));
118 : }
119 : }
120 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
121 : "Unsupported contract output type %d",
122 : output->type);
123 0 : GNUNET_assert (0);
124 : return NULL;
125 : }
126 :
127 :
128 : json_t *
129 32 : TALER_MERCHANT_json_from_contract_choice (
130 : const struct TALER_MERCHANT_ContractChoice *choice)
131 : {
132 : json_t *inputs;
133 : json_t *outputs;
134 :
135 32 : inputs = json_array ();
136 32 : GNUNET_assert (NULL != inputs);
137 38 : for (unsigned int i = 0; i < choice->inputs_len; i++)
138 6 : GNUNET_assert (0 ==
139 : json_array_append_new (inputs,
140 : json_from_contract_input (
141 : &choice->inputs[i])));
142 32 : outputs = json_array ();
143 32 : GNUNET_assert (NULL != outputs);
144 44 : for (unsigned int i = 0; i < choice->outputs_len; i++)
145 12 : GNUNET_assert (0 ==
146 : json_array_append_new (outputs,
147 : json_from_contract_output (
148 : &choice->outputs[i])));
149 :
150 32 : return GNUNET_JSON_PACK (
151 : TALER_JSON_pack_amount ("amount",
152 : &choice->amount),
153 : GNUNET_JSON_pack_allow_null (
154 : TALER_JSON_pack_amount ("tip",
155 : choice->no_tip
156 : ? NULL
157 : : &choice->tip)),
158 : GNUNET_JSON_pack_allow_null (
159 : GNUNET_JSON_pack_string ("description",
160 : choice->description)),
161 : GNUNET_JSON_pack_allow_null (
162 : GNUNET_JSON_pack_object_incref ("description_i18n",
163 : choice->description_i18n)),
164 : TALER_JSON_pack_amount ("max_fee",
165 : &choice->max_fee),
166 : GNUNET_JSON_pack_array_steal ("inputs",
167 : inputs),
168 : GNUNET_JSON_pack_array_steal ("outputs",
169 : outputs));
170 : }
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