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-global-fees.c
19 : * @brief functions to set global 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-global-fees.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_PostManagementGlobalFeesHandle
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_PostManagementGlobalFeesCallback cb;
60 :
61 : /**
62 : * Closure for @a cb.
63 : */
64 : TALER_EXCHANGE_POST_MANAGEMENT_GLOBAL_FEES_RESULT_CLOSURE *cb_cls;
65 :
66 : /**
67 : * Reference to the execution context.
68 : */
69 : struct GNUNET_CURL_Context *ctx;
70 :
71 : /**
72 : * Start of validity period.
73 : */
74 : struct GNUNET_TIME_Timestamp validity_start;
75 :
76 : /**
77 : * End of validity period.
78 : */
79 : struct GNUNET_TIME_Timestamp validity_end;
80 :
81 : /**
82 : * Global fees for this time period.
83 : */
84 : struct TALER_GlobalFeeSet fees;
85 :
86 : /**
87 : * When do purses time out.
88 : */
89 : struct GNUNET_TIME_Relative purse_timeout;
90 :
91 : /**
92 : * How long are account histories preserved.
93 : */
94 : struct GNUNET_TIME_Relative history_expiration;
95 :
96 : /**
97 : * How many purses are free per account.
98 : */
99 : uint32_t purse_account_limit;
100 :
101 : /**
102 : * Signature affirming the global fees.
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/global-fees request.
112 : *
113 : * @param cls the `struct TALER_EXCHANGE_PostManagementGlobalFeesHandle`
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 34 : handle_global_fees_finished (void *cls,
119 : long response_code,
120 : const void *response)
121 : {
122 34 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *pmgfh = cls;
123 34 : const json_t *json = response;
124 34 : struct TALER_EXCHANGE_PostManagementGlobalFeesResponse res = {
125 34 : .hr.http_status = (unsigned int) response_code,
126 : .hr.reply = json
127 : };
128 :
129 34 : pmgfh->job = NULL;
130 34 : switch (response_code)
131 : {
132 34 : case MHD_HTTP_NO_CONTENT:
133 34 : break;
134 0 : case MHD_HTTP_FORBIDDEN:
135 0 : res.hr.ec = TALER_JSON_get_error_code (json);
136 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
137 0 : break;
138 0 : case MHD_HTTP_CONFLICT:
139 0 : res.hr.ec = TALER_JSON_get_error_code (json);
140 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
141 0 : break;
142 0 : case MHD_HTTP_REQUEST_ENTITY_TOO_LARGE:
143 0 : res.hr.ec = TALER_JSON_get_error_code (json);
144 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
145 0 : break;
146 0 : default:
147 : /* unexpected response code */
148 0 : GNUNET_break_op (0);
149 0 : res.hr.ec = TALER_JSON_get_error_code (json);
150 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
151 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
152 : "Unexpected response code %u/%d for exchange management set global fee\n",
153 : (unsigned int) response_code,
154 : (int) res.hr.ec);
155 0 : break;
156 : }
157 34 : if (NULL != pmgfh->cb)
158 : {
159 34 : pmgfh->cb (pmgfh->cb_cls,
160 : &res);
161 34 : pmgfh->cb = NULL;
162 : }
163 34 : TALER_EXCHANGE_post_management_global_fees_cancel (pmgfh);
164 34 : }
165 :
166 :
167 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *
168 34 : TALER_EXCHANGE_post_management_global_fees_create (
169 : struct GNUNET_CURL_Context *ctx,
170 : const char *exchange_base_url,
171 : struct GNUNET_TIME_Timestamp validity_start,
172 : struct GNUNET_TIME_Timestamp validity_end,
173 : const struct TALER_GlobalFeeSet *fees,
174 : struct GNUNET_TIME_Relative purse_timeout,
175 : struct GNUNET_TIME_Relative history_expiration,
176 : uint32_t purse_account_limit,
177 : const struct TALER_MasterSignatureP *master_sig)
178 : {
179 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *pmgfh;
180 :
181 34 : pmgfh = GNUNET_new (struct TALER_EXCHANGE_PostManagementGlobalFeesHandle);
182 34 : pmgfh->ctx = ctx;
183 34 : pmgfh->base_url = GNUNET_strdup (exchange_base_url);
184 34 : pmgfh->validity_start = validity_start;
185 34 : pmgfh->validity_end = validity_end;
186 34 : pmgfh->fees = *fees;
187 34 : pmgfh->purse_timeout = purse_timeout;
188 34 : pmgfh->history_expiration = history_expiration;
189 34 : pmgfh->purse_account_limit = purse_account_limit;
190 34 : pmgfh->master_sig = *master_sig;
191 34 : return pmgfh;
192 : }
193 :
194 :
195 : enum TALER_ErrorCode
196 34 : TALER_EXCHANGE_post_management_global_fees_start (
197 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *pmgfh,
198 : TALER_EXCHANGE_PostManagementGlobalFeesCallback cb,
199 : TALER_EXCHANGE_POST_MANAGEMENT_GLOBAL_FEES_RESULT_CLOSURE *cb_cls)
200 : {
201 : CURL *eh;
202 : json_t *body;
203 :
204 34 : pmgfh->cb = cb;
205 34 : pmgfh->cb_cls = cb_cls;
206 34 : pmgfh->url = TALER_url_join (pmgfh->base_url,
207 : "management/global-fee",
208 : NULL);
209 34 : if (NULL == pmgfh->url)
210 : {
211 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
212 : "Could not construct request URL.\n");
213 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
214 : }
215 34 : body = GNUNET_JSON_PACK (
216 : GNUNET_JSON_pack_data_auto ("master_sig",
217 : &pmgfh->master_sig),
218 : GNUNET_JSON_pack_timestamp ("fee_start",
219 : pmgfh->validity_start),
220 : GNUNET_JSON_pack_timestamp ("fee_end",
221 : pmgfh->validity_end),
222 : TALER_JSON_pack_amount ("history_fee",
223 : &pmgfh->fees.history),
224 : TALER_JSON_pack_amount ("account_fee",
225 : &pmgfh->fees.account),
226 : TALER_JSON_pack_amount ("purse_fee",
227 : &pmgfh->fees.purse),
228 : GNUNET_JSON_pack_time_rel ("purse_timeout",
229 : pmgfh->purse_timeout),
230 : GNUNET_JSON_pack_time_rel ("history_expiration",
231 : pmgfh->history_expiration),
232 : GNUNET_JSON_pack_uint64 ("purse_account_limit",
233 : pmgfh->purse_account_limit));
234 34 : eh = TALER_EXCHANGE_curl_easy_get_ (pmgfh->url);
235 68 : if ( (NULL == eh) ||
236 : (GNUNET_OK !=
237 34 : TALER_curl_easy_post (&pmgfh->post_ctx,
238 : eh,
239 : body)) )
240 : {
241 0 : GNUNET_break (0);
242 0 : if (NULL != eh)
243 0 : curl_easy_cleanup (eh);
244 0 : json_decref (body);
245 0 : GNUNET_free (pmgfh->url);
246 0 : pmgfh->url = NULL;
247 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
248 : }
249 34 : json_decref (body);
250 34 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
251 : "Requesting URL '%s'\n",
252 : pmgfh->url);
253 68 : pmgfh->job = GNUNET_CURL_job_add2 (pmgfh->ctx,
254 : eh,
255 34 : pmgfh->post_ctx.headers,
256 : &handle_global_fees_finished,
257 : pmgfh);
258 34 : if (NULL == pmgfh->job)
259 : {
260 0 : GNUNET_break (0);
261 0 : TALER_curl_easy_post_finished (&pmgfh->post_ctx);
262 0 : GNUNET_free (pmgfh->url);
263 0 : pmgfh->url = NULL;
264 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
265 : }
266 34 : return TALER_EC_NONE;
267 : }
268 :
269 :
270 : void
271 34 : TALER_EXCHANGE_post_management_global_fees_cancel (
272 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *pmgfh)
273 : {
274 34 : if (NULL != pmgfh->job)
275 : {
276 0 : GNUNET_CURL_job_cancel (pmgfh->job);
277 0 : pmgfh->job = NULL;
278 : }
279 34 : TALER_curl_easy_post_finished (&pmgfh->post_ctx);
280 34 : GNUNET_free (pmgfh->url);
281 34 : GNUNET_free (pmgfh->base_url);
282 34 : GNUNET_free (pmgfh);
283 34 : }
284 :
285 :
286 : /* end of exchange_api_post-management-global-fees.c */
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