Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2023-2026 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
15 : <http://www.gnu.org/licenses/>
16 : */
17 : /**
18 : * @file lib/exchange_api_post-management-partners.c
19 : * @brief functions to add a partner exchange
20 : * @author Christian Grothoff
21 : */
22 : #include "taler/platform.h"
23 : #include "taler/taler_json_lib.h"
24 : #include <gnunet/gnunet_curl_lib.h>
25 : #include <microhttpd.h>
26 : #include "taler/taler_exchange_service.h"
27 : #include "taler/taler-exchange/post-management-partners.h"
28 : #include "exchange_api_curl_defaults.h"
29 : #include "taler/taler_signatures.h"
30 : #include "taler/taler_curl_lib.h"
31 :
32 :
33 : struct TALER_EXCHANGE_PostManagementPartnersHandle
34 : {
35 :
36 : /**
37 : * The base URL for this request.
38 : */
39 : char *base_url;
40 :
41 : /**
42 : * The full URL for this request, set during _start.
43 : */
44 : char *url;
45 :
46 : /**
47 : * Minor context that holds body and headers.
48 : */
49 : struct TALER_CURL_PostContext post_ctx;
50 :
51 : /**
52 : * Handle for the request.
53 : */
54 : struct GNUNET_CURL_Job *job;
55 :
56 : /**
57 : * Function to call with the result.
58 : */
59 : TALER_EXCHANGE_PostManagementPartnersCallback cb;
60 :
61 : /**
62 : * Closure for @a cb.
63 : */
64 : TALER_EXCHANGE_POST_MANAGEMENT_PARTNERS_RESULT_CLOSURE *cb_cls;
65 :
66 : /**
67 : * Reference to the execution context.
68 : */
69 : struct GNUNET_CURL_Context *ctx;
70 :
71 : /**
72 : * Offline signing key of the partner.
73 : */
74 : struct TALER_MasterPublicKeyP partner_pub;
75 :
76 : /**
77 : * Validity period start.
78 : */
79 : struct GNUNET_TIME_Timestamp start_date;
80 :
81 : /**
82 : * Validity period end.
83 : */
84 : struct GNUNET_TIME_Timestamp end_date;
85 :
86 : /**
87 : * How often will we do wad transfers to this partner.
88 : */
89 : struct GNUNET_TIME_Relative wad_frequency;
90 :
91 : /**
92 : * Wad fee to this partner.
93 : */
94 : struct TALER_Amount wad_fee;
95 :
96 : /**
97 : * Base URL of the partner exchange.
98 : */
99 : char *partner_base_url;
100 :
101 : /**
102 : * Signature.
103 : */
104 : struct TALER_MasterSignatureP master_sig;
105 :
106 : };
107 :
108 :
109 : /**
110 : * Function called when we're done processing the
111 : * HTTP POST /management/partners request.
112 : *
113 : * @param cls the `struct TALER_EXCHANGE_PostManagementPartnersHandle`
114 : * @param response_code HTTP response code, 0 on error
115 : * @param response response body, NULL if not in JSON
116 : */
117 : static void
118 0 : handle_partners_finished (void *cls,
119 : long response_code,
120 : const void *response)
121 : {
122 0 : struct TALER_EXCHANGE_PostManagementPartnersHandle *pmph = cls;
123 0 : const json_t *json = response;
124 0 : struct TALER_EXCHANGE_PostManagementPartnersResponse res = {
125 0 : .hr.http_status = (unsigned int) response_code,
126 : .hr.reply = json
127 : };
128 :
129 0 : pmph->job = NULL;
130 0 : switch (response_code)
131 : {
132 0 : case 0:
133 : /* no reply */
134 0 : res.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
135 0 : res.hr.hint = "server offline?";
136 0 : break;
137 0 : case MHD_HTTP_NO_CONTENT:
138 0 : break;
139 0 : case MHD_HTTP_FORBIDDEN:
140 0 : res.hr.ec = TALER_JSON_get_error_code (json);
141 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
142 0 : break;
143 0 : case MHD_HTTP_CONFLICT:
144 0 : res.hr.ec = TALER_JSON_get_error_code (json);
145 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
146 0 : break;
147 0 : default:
148 : /* unexpected response code */
149 0 : GNUNET_break_op (0);
150 0 : res.hr.ec = TALER_JSON_get_error_code (json);
151 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
152 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
153 : "Unexpected response code %u/%d for adding exchange partner\n",
154 : (unsigned int) response_code,
155 : (int) res.hr.ec);
156 0 : break;
157 : }
158 0 : if (NULL != pmph->cb)
159 : {
160 0 : pmph->cb (pmph->cb_cls,
161 : &res);
162 0 : pmph->cb = NULL;
163 : }
164 0 : TALER_EXCHANGE_post_management_partners_cancel (pmph);
165 0 : }
166 :
167 :
168 : struct TALER_EXCHANGE_PostManagementPartnersHandle *
169 0 : TALER_EXCHANGE_post_management_partners_create (
170 : struct GNUNET_CURL_Context *ctx,
171 : const char *url,
172 : const struct TALER_MasterPublicKeyP *partner_pub,
173 : struct GNUNET_TIME_Timestamp start_date,
174 : struct GNUNET_TIME_Timestamp end_date,
175 : struct GNUNET_TIME_Relative wad_frequency,
176 : const struct TALER_Amount *wad_fee,
177 : const char *partner_base_url,
178 : const struct TALER_MasterSignatureP *master_sig)
179 : {
180 : struct TALER_EXCHANGE_PostManagementPartnersHandle *pmph;
181 :
182 0 : pmph = GNUNET_new (struct TALER_EXCHANGE_PostManagementPartnersHandle);
183 0 : pmph->ctx = ctx;
184 0 : pmph->base_url = GNUNET_strdup (url);
185 0 : pmph->partner_pub = *partner_pub;
186 0 : pmph->start_date = start_date;
187 0 : pmph->end_date = end_date;
188 0 : pmph->wad_frequency = wad_frequency;
189 0 : pmph->wad_fee = *wad_fee;
190 0 : pmph->partner_base_url = GNUNET_strdup (partner_base_url);
191 0 : pmph->master_sig = *master_sig;
192 0 : return pmph;
193 : }
194 :
195 :
196 : enum TALER_ErrorCode
197 0 : TALER_EXCHANGE_post_management_partners_start (
198 : struct TALER_EXCHANGE_PostManagementPartnersHandle *pmph,
199 : TALER_EXCHANGE_PostManagementPartnersCallback cb,
200 : TALER_EXCHANGE_POST_MANAGEMENT_PARTNERS_RESULT_CLOSURE *cb_cls)
201 : {
202 : CURL *eh;
203 : json_t *body;
204 :
205 0 : pmph->cb = cb;
206 0 : pmph->cb_cls = cb_cls;
207 0 : pmph->url = TALER_url_join (pmph->base_url,
208 : "management/partners",
209 : NULL);
210 0 : if (NULL == pmph->url)
211 : {
212 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
213 : "Could not construct request URL.\n");
214 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
215 : }
216 0 : body = GNUNET_JSON_PACK (
217 : GNUNET_JSON_pack_string ("partner_base_url",
218 : pmph->partner_base_url),
219 : GNUNET_JSON_pack_timestamp ("start_date",
220 : pmph->start_date),
221 : GNUNET_JSON_pack_timestamp ("end_date",
222 : pmph->end_date),
223 : GNUNET_JSON_pack_time_rel ("wad_frequency",
224 : pmph->wad_frequency),
225 : GNUNET_JSON_pack_data_auto ("partner_pub",
226 : &pmph->partner_pub),
227 : GNUNET_JSON_pack_data_auto ("master_sig",
228 : &pmph->master_sig),
229 : TALER_JSON_pack_amount ("wad_fee",
230 : &pmph->wad_fee));
231 0 : eh = TALER_EXCHANGE_curl_easy_get_ (pmph->url);
232 0 : if ( (NULL == eh) ||
233 : (GNUNET_OK !=
234 0 : TALER_curl_easy_post (&pmph->post_ctx,
235 : eh,
236 : body)) )
237 : {
238 0 : GNUNET_break (0);
239 0 : if (NULL != eh)
240 0 : curl_easy_cleanup (eh);
241 0 : json_decref (body);
242 0 : GNUNET_free (pmph->url);
243 0 : pmph->url = NULL;
244 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
245 : }
246 0 : json_decref (body);
247 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
248 : "Requesting URL '%s'\n",
249 : pmph->url);
250 0 : pmph->job = GNUNET_CURL_job_add2 (pmph->ctx,
251 : eh,
252 0 : pmph->post_ctx.headers,
253 : &handle_partners_finished,
254 : pmph);
255 0 : if (NULL == pmph->job)
256 : {
257 0 : TALER_curl_easy_post_finished (&pmph->post_ctx);
258 0 : GNUNET_free (pmph->url);
259 0 : pmph->url = NULL;
260 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
261 : }
262 0 : return TALER_EC_NONE;
263 : }
264 :
265 :
266 : void
267 0 : TALER_EXCHANGE_post_management_partners_cancel (
268 : struct TALER_EXCHANGE_PostManagementPartnersHandle *pmph)
269 : {
270 0 : if (NULL != pmph->job)
271 : {
272 0 : GNUNET_CURL_job_cancel (pmph->job);
273 0 : pmph->job = NULL;
274 : }
275 0 : TALER_curl_easy_post_finished (&pmph->post_ctx);
276 0 : GNUNET_free (pmph->partner_base_url);
277 0 : GNUNET_free (pmph->url);
278 0 : GNUNET_free (pmph->base_url);
279 0 : GNUNET_free (pmph);
280 0 : }
281 :
282 :
283 : /* end of exchange_api_post-management-partners.c */
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