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/taler_json_lib.h"
23 : #include <gnunet/gnunet_curl_lib.h>
24 : #include <microhttpd.h>
25 : #include "taler/exchange/post-management-global-fees.h"
26 : #include "exchange_api_curl_defaults.h"
27 : #include "taler/taler_curl_lib.h"
28 :
29 :
30 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle
31 : {
32 :
33 : /**
34 : * The base URL for this request.
35 : */
36 : char *base_url;
37 :
38 : /**
39 : * The full URL for this request, set during _start.
40 : */
41 : char *url;
42 :
43 : /**
44 : * Minor context that holds body and headers.
45 : */
46 : struct TALER_CURL_PostContext post_ctx;
47 :
48 : /**
49 : * Handle for the request.
50 : */
51 : struct GNUNET_CURL_Job *job;
52 :
53 : /**
54 : * Function to call with the result.
55 : */
56 : TALER_EXCHANGE_PostManagementGlobalFeesCallback cb;
57 :
58 : /**
59 : * Closure for @a cb.
60 : */
61 : TALER_EXCHANGE_POST_MANAGEMENT_GLOBAL_FEES_RESULT_CLOSURE *cb_cls;
62 :
63 : /**
64 : * Reference to the execution context.
65 : */
66 : struct GNUNET_CURL_Context *ctx;
67 :
68 : /**
69 : * Start of validity period.
70 : */
71 : struct GNUNET_TIME_Timestamp validity_start;
72 :
73 : /**
74 : * End of validity period.
75 : */
76 : struct GNUNET_TIME_Timestamp validity_end;
77 :
78 : /**
79 : * Global fees for this time period.
80 : */
81 : struct TALER_GlobalFeeSet fees;
82 :
83 : /**
84 : * When do purses time out.
85 : */
86 : struct GNUNET_TIME_Relative purse_timeout;
87 :
88 : /**
89 : * How long are account histories preserved.
90 : */
91 : struct GNUNET_TIME_Relative history_expiration;
92 :
93 : /**
94 : * How many purses are free per account.
95 : */
96 : uint32_t purse_account_limit;
97 :
98 : /**
99 : * Signature affirming the global fees.
100 : */
101 : struct TALER_MasterSignatureP master_sig;
102 :
103 : };
104 :
105 :
106 : /**
107 : * Function called when we're done processing the
108 : * HTTP POST /management/global-fees request.
109 : *
110 : * @param cls the `struct TALER_EXCHANGE_PostManagementGlobalFeesHandle`
111 : * @param response_code HTTP response code, 0 on error
112 : * @param response response body, NULL if not in JSON
113 : */
114 : static void
115 34 : handle_global_fees_finished (void *cls,
116 : long response_code,
117 : const void *response)
118 : {
119 34 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *pmgfh = cls;
120 34 : const json_t *json = response;
121 34 : struct TALER_EXCHANGE_PostManagementGlobalFeesResponse res = {
122 34 : .hr.http_status = (unsigned int) response_code,
123 : .hr.reply = json
124 : };
125 :
126 34 : pmgfh->job = NULL;
127 34 : switch (response_code)
128 : {
129 34 : case MHD_HTTP_NO_CONTENT:
130 34 : break;
131 0 : case MHD_HTTP_FORBIDDEN:
132 0 : res.hr.ec = TALER_JSON_get_error_code (json);
133 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
134 0 : break;
135 0 : case MHD_HTTP_CONFLICT:
136 0 : res.hr.ec = TALER_JSON_get_error_code (json);
137 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
138 0 : break;
139 0 : case MHD_HTTP_CONTENT_TOO_LARGE:
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 : default:
144 : /* unexpected response code */
145 0 : GNUNET_break_op (0);
146 0 : res.hr.ec = TALER_JSON_get_error_code (json);
147 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
148 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
149 : "Unexpected response code %u/%d for exchange management set global fee\n",
150 : (unsigned int) response_code,
151 : (int) res.hr.ec);
152 0 : break;
153 : }
154 34 : if (NULL != pmgfh->cb)
155 : {
156 34 : pmgfh->cb (pmgfh->cb_cls,
157 : &res);
158 34 : pmgfh->cb = NULL;
159 : }
160 34 : TALER_EXCHANGE_post_management_global_fees_cancel (pmgfh);
161 34 : }
162 :
163 :
164 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *
165 34 : TALER_EXCHANGE_post_management_global_fees_create (
166 : struct GNUNET_CURL_Context *ctx,
167 : const char *exchange_base_url,
168 : struct GNUNET_TIME_Timestamp validity_start,
169 : struct GNUNET_TIME_Timestamp validity_end,
170 : const struct TALER_GlobalFeeSet *fees,
171 : struct GNUNET_TIME_Relative purse_timeout,
172 : struct GNUNET_TIME_Relative history_expiration,
173 : uint32_t purse_account_limit,
174 : const struct TALER_MasterSignatureP *master_sig)
175 : {
176 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *pmgfh;
177 :
178 34 : pmgfh = GNUNET_new (struct TALER_EXCHANGE_PostManagementGlobalFeesHandle);
179 34 : pmgfh->ctx = ctx;
180 34 : pmgfh->base_url = GNUNET_strdup (exchange_base_url);
181 34 : pmgfh->validity_start = validity_start;
182 34 : pmgfh->validity_end = validity_end;
183 34 : pmgfh->fees = *fees;
184 34 : pmgfh->purse_timeout = purse_timeout;
185 34 : pmgfh->history_expiration = history_expiration;
186 34 : pmgfh->purse_account_limit = purse_account_limit;
187 34 : pmgfh->master_sig = *master_sig;
188 34 : return pmgfh;
189 : }
190 :
191 :
192 : enum TALER_ErrorCode
193 34 : TALER_EXCHANGE_post_management_global_fees_start (
194 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *pmgfh,
195 : TALER_EXCHANGE_PostManagementGlobalFeesCallback cb,
196 : TALER_EXCHANGE_POST_MANAGEMENT_GLOBAL_FEES_RESULT_CLOSURE *cb_cls)
197 : {
198 : CURL *eh;
199 : json_t *body;
200 :
201 34 : pmgfh->cb = cb;
202 34 : pmgfh->cb_cls = cb_cls;
203 34 : pmgfh->url = TALER_url_join (pmgfh->base_url,
204 : "management/global-fee",
205 : NULL);
206 34 : if (NULL == pmgfh->url)
207 : {
208 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
209 : "Could not construct request URL.\n");
210 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
211 : }
212 34 : body = GNUNET_JSON_PACK (
213 : GNUNET_JSON_pack_data_auto ("master_sig",
214 : &pmgfh->master_sig),
215 : GNUNET_JSON_pack_timestamp ("fee_start",
216 : pmgfh->validity_start),
217 : GNUNET_JSON_pack_timestamp ("fee_end",
218 : pmgfh->validity_end),
219 : TALER_JSON_pack_amount ("history_fee",
220 : &pmgfh->fees.history),
221 : TALER_JSON_pack_amount ("account_fee",
222 : &pmgfh->fees.account),
223 : TALER_JSON_pack_amount ("purse_fee",
224 : &pmgfh->fees.purse),
225 : GNUNET_JSON_pack_time_rel ("purse_timeout",
226 : pmgfh->purse_timeout),
227 : GNUNET_JSON_pack_time_rel ("history_expiration",
228 : pmgfh->history_expiration),
229 : GNUNET_JSON_pack_uint64 ("purse_account_limit",
230 : pmgfh->purse_account_limit));
231 34 : eh = TALER_EXCHANGE_curl_easy_get_ (pmgfh->url);
232 68 : if ( (NULL == eh) ||
233 : (GNUNET_OK !=
234 34 : TALER_curl_easy_post (&pmgfh->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 (pmgfh->url);
243 0 : pmgfh->url = NULL;
244 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
245 : }
246 34 : json_decref (body);
247 34 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
248 : "Requesting URL '%s'\n",
249 : pmgfh->url);
250 68 : pmgfh->job = GNUNET_CURL_job_add2 (pmgfh->ctx,
251 : eh,
252 34 : pmgfh->post_ctx.headers,
253 : &handle_global_fees_finished,
254 : pmgfh);
255 34 : if (NULL == pmgfh->job)
256 : {
257 0 : GNUNET_break (0);
258 0 : TALER_curl_easy_post_finished (&pmgfh->post_ctx);
259 0 : GNUNET_free (pmgfh->url);
260 0 : pmgfh->url = NULL;
261 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
262 : }
263 34 : return TALER_EC_NONE;
264 : }
265 :
266 :
267 : void
268 34 : TALER_EXCHANGE_post_management_global_fees_cancel (
269 : struct TALER_EXCHANGE_PostManagementGlobalFeesHandle *pmgfh)
270 : {
271 34 : if (NULL != pmgfh->job)
272 : {
273 0 : GNUNET_CURL_job_cancel (pmgfh->job);
274 0 : pmgfh->job = NULL;
275 : }
276 34 : TALER_curl_easy_post_finished (&pmgfh->post_ctx);
277 34 : GNUNET_free (pmgfh->url);
278 34 : GNUNET_free (pmgfh->base_url);
279 34 : GNUNET_free (pmgfh);
280 34 : }
281 :
282 :
283 : /* end of exchange_api_post-management-global-fees.c */
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