Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2020-2026 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-wire-fee.c
19 : * @brief functions to set wire fees at an 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-wire-fee.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_PostManagementWireFeesHandle
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_PostManagementWireFeesCallback cb;
60 :
61 : /**
62 : * Closure for @a cb.
63 : */
64 : TALER_EXCHANGE_POST_MANAGEMENT_WIRE_FEES_RESULT_CLOSURE *cb_cls;
65 :
66 : /**
67 : * Reference to the execution context.
68 : */
69 : struct GNUNET_CURL_Context *ctx;
70 :
71 : /**
72 : * Wire method these fees are for.
73 : */
74 : char *wire_method;
75 :
76 : /**
77 : * Start of validity period.
78 : */
79 : struct GNUNET_TIME_Timestamp validity_start;
80 :
81 : /**
82 : * End of validity period.
83 : */
84 : struct GNUNET_TIME_Timestamp validity_end;
85 :
86 : /**
87 : * Wire fees for this time period.
88 : */
89 : struct TALER_WireFeeSet fees;
90 :
91 : /**
92 : * Signature affirming the wire fees.
93 : */
94 : struct TALER_MasterSignatureP master_sig;
95 :
96 : };
97 :
98 :
99 : /**
100 : * Function called when we're done processing the
101 : * HTTP POST /management/wire-fees request.
102 : *
103 : * @param cls the `struct TALER_EXCHANGE_PostManagementWireFeesHandle`
104 : * @param response_code HTTP response code, 0 on error
105 : * @param response response body, NULL if not in JSON
106 : */
107 : static void
108 44 : handle_wire_fees_finished (void *cls,
109 : long response_code,
110 : const void *response)
111 : {
112 44 : struct TALER_EXCHANGE_PostManagementWireFeesHandle *pmwfh = cls;
113 44 : const json_t *json = response;
114 44 : struct TALER_EXCHANGE_PostManagementWireFeesResponse res = {
115 44 : .hr.http_status = (unsigned int) response_code,
116 : .hr.reply = json
117 : };
118 :
119 44 : pmwfh->job = NULL;
120 44 : switch (response_code)
121 : {
122 40 : case MHD_HTTP_NO_CONTENT:
123 40 : break;
124 2 : case MHD_HTTP_FORBIDDEN:
125 2 : res.hr.ec = TALER_JSON_get_error_code (json);
126 2 : res.hr.hint = TALER_JSON_get_error_hint (json);
127 2 : break;
128 0 : case MHD_HTTP_NOT_FOUND:
129 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
130 : "Server did not find handler at `%s'. Did you configure the correct exchange base URL?\n",
131 : pmwfh->url);
132 0 : if (NULL != json)
133 : {
134 0 : res.hr.ec = TALER_JSON_get_error_code (json);
135 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
136 : }
137 : else
138 : {
139 0 : res.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
140 0 : res.hr.hint = TALER_ErrorCode_get_hint (res.hr.ec);
141 : }
142 0 : break;
143 2 : case MHD_HTTP_CONFLICT:
144 2 : res.hr.ec = TALER_JSON_get_error_code (json);
145 2 : res.hr.hint = TALER_JSON_get_error_hint (json);
146 2 : break;
147 0 : case MHD_HTTP_PRECONDITION_FAILED:
148 0 : res.hr.ec = TALER_JSON_get_error_code (json);
149 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
150 0 : break;
151 0 : default:
152 : /* unexpected response code */
153 0 : GNUNET_break_op (0);
154 0 : res.hr.ec = TALER_JSON_get_error_code (json);
155 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
156 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
157 : "Unexpected response code %u/%d for exchange management set wire fee\n",
158 : (unsigned int) response_code,
159 : (int) res.hr.ec);
160 0 : break;
161 : }
162 44 : if (NULL != pmwfh->cb)
163 : {
164 44 : pmwfh->cb (pmwfh->cb_cls,
165 : &res);
166 44 : pmwfh->cb = NULL;
167 : }
168 44 : TALER_EXCHANGE_post_management_wire_fees_cancel (pmwfh);
169 44 : }
170 :
171 :
172 : struct TALER_EXCHANGE_PostManagementWireFeesHandle *
173 44 : TALER_EXCHANGE_post_management_wire_fees_create (
174 : struct GNUNET_CURL_Context *ctx,
175 : const char *exchange_base_url,
176 : const char *wire_method,
177 : struct GNUNET_TIME_Timestamp validity_start,
178 : struct GNUNET_TIME_Timestamp validity_end,
179 : const struct TALER_WireFeeSet *fees,
180 : const struct TALER_MasterSignatureP *master_sig)
181 : {
182 : struct TALER_EXCHANGE_PostManagementWireFeesHandle *pmwfh;
183 :
184 44 : pmwfh = GNUNET_new (struct TALER_EXCHANGE_PostManagementWireFeesHandle);
185 44 : pmwfh->ctx = ctx;
186 44 : pmwfh->base_url = GNUNET_strdup (exchange_base_url);
187 44 : pmwfh->wire_method = GNUNET_strdup (wire_method);
188 44 : pmwfh->validity_start = validity_start;
189 44 : pmwfh->validity_end = validity_end;
190 44 : pmwfh->fees = *fees;
191 44 : pmwfh->master_sig = *master_sig;
192 44 : return pmwfh;
193 : }
194 :
195 :
196 : enum TALER_ErrorCode
197 44 : TALER_EXCHANGE_post_management_wire_fees_start (
198 : struct TALER_EXCHANGE_PostManagementWireFeesHandle *pmwfh,
199 : TALER_EXCHANGE_PostManagementWireFeesCallback cb,
200 : TALER_EXCHANGE_POST_MANAGEMENT_WIRE_FEES_RESULT_CLOSURE *cb_cls)
201 : {
202 : CURL *eh;
203 : json_t *body;
204 :
205 44 : pmwfh->cb = cb;
206 44 : pmwfh->cb_cls = cb_cls;
207 44 : pmwfh->url = TALER_url_join (pmwfh->base_url,
208 : "management/wire-fee",
209 : NULL);
210 44 : if (NULL == pmwfh->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 44 : body = GNUNET_JSON_PACK (
217 : GNUNET_JSON_pack_string ("wire_method",
218 : pmwfh->wire_method),
219 : GNUNET_JSON_pack_data_auto ("master_sig",
220 : &pmwfh->master_sig),
221 : GNUNET_JSON_pack_timestamp ("fee_start",
222 : pmwfh->validity_start),
223 : GNUNET_JSON_pack_timestamp ("fee_end",
224 : pmwfh->validity_end),
225 : TALER_JSON_pack_amount ("closing_fee",
226 : &pmwfh->fees.closing),
227 : TALER_JSON_pack_amount ("wire_fee",
228 : &pmwfh->fees.wire));
229 44 : eh = TALER_EXCHANGE_curl_easy_get_ (pmwfh->url);
230 88 : if ( (NULL == eh) ||
231 : (GNUNET_OK !=
232 44 : TALER_curl_easy_post (&pmwfh->post_ctx,
233 : eh,
234 : body)) )
235 : {
236 0 : GNUNET_break (0);
237 0 : if (NULL != eh)
238 0 : curl_easy_cleanup (eh);
239 0 : json_decref (body);
240 0 : GNUNET_free (pmwfh->url);
241 0 : pmwfh->url = NULL;
242 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
243 : }
244 44 : json_decref (body);
245 44 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
246 : "Requesting URL '%s'\n",
247 : pmwfh->url);
248 88 : pmwfh->job = GNUNET_CURL_job_add2 (pmwfh->ctx,
249 : eh,
250 44 : pmwfh->post_ctx.headers,
251 : &handle_wire_fees_finished,
252 : pmwfh);
253 44 : if (NULL == pmwfh->job)
254 : {
255 0 : TALER_curl_easy_post_finished (&pmwfh->post_ctx);
256 0 : GNUNET_free (pmwfh->url);
257 0 : pmwfh->url = NULL;
258 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
259 : }
260 44 : return TALER_EC_NONE;
261 : }
262 :
263 :
264 : void
265 44 : TALER_EXCHANGE_post_management_wire_fees_cancel (
266 : struct TALER_EXCHANGE_PostManagementWireFeesHandle *pmwfh)
267 : {
268 44 : if (NULL != pmwfh->job)
269 : {
270 0 : GNUNET_CURL_job_cancel (pmwfh->job);
271 0 : pmwfh->job = NULL;
272 : }
273 44 : TALER_curl_easy_post_finished (&pmwfh->post_ctx);
274 44 : GNUNET_free (pmwfh->wire_method);
275 44 : GNUNET_free (pmwfh->url);
276 44 : GNUNET_free (pmwfh->base_url);
277 44 : GNUNET_free (pmwfh);
278 44 : }
279 :
280 :
281 : /* end of exchange_api_post-management-wire-fee.c */
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