Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2020-2022 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_management_set_global_fee.c
19 : * @brief functions to set global fees at an exchange
20 : * @author Christian Grothoff
21 : */
22 : #include "platform.h"
23 : #include "taler_json_lib.h"
24 : #include <gnunet/gnunet_curl_lib.h>
25 : #include <microhttpd.h>
26 : #include "exchange_api_curl_defaults.h"
27 : #include "taler_exchange_service.h"
28 : #include "taler_signatures.h"
29 : #include "taler_curl_lib.h"
30 : #include "taler_json_lib.h"
31 :
32 :
33 : struct TALER_EXCHANGE_ManagementSetGlobalFeeHandle
34 : {
35 :
36 : /**
37 : * The url for this request.
38 : */
39 : char *url;
40 :
41 : /**
42 : * Minor context that holds body and headers.
43 : */
44 : struct TALER_CURL_PostContext post_ctx;
45 :
46 : /**
47 : * Handle for the request.
48 : */
49 : struct GNUNET_CURL_Job *job;
50 :
51 : /**
52 : * Function to call with the result.
53 : */
54 : TALER_EXCHANGE_ManagementSetGlobalFeeCallback cb;
55 :
56 : /**
57 : * Closure for @a cb.
58 : */
59 : void *cb_cls;
60 :
61 : /**
62 : * Reference to the execution context.
63 : */
64 : struct GNUNET_CURL_Context *ctx;
65 : };
66 :
67 :
68 : /**
69 : * Function called when we're done processing the
70 : * HTTP /management/global request.
71 : *
72 : * @param cls the `struct TALER_EXCHANGE_ManagementAuditorEnableHandle *`
73 : * @param response_code HTTP response code, 0 on error
74 : * @param response response body, NULL if not in JSON
75 : */
76 : static void
77 19 : handle_set_global_fee_finished (void *cls,
78 : long response_code,
79 : const void *response)
80 : {
81 19 : struct TALER_EXCHANGE_ManagementSetGlobalFeeHandle *sgfh = cls;
82 19 : const json_t *json = response;
83 19 : struct TALER_EXCHANGE_ManagementSetGlobalFeeResponse sfr = {
84 19 : .hr.http_status = (unsigned int) response_code,
85 : .hr.reply = json
86 : };
87 :
88 19 : sgfh->job = NULL;
89 19 : switch (response_code)
90 : {
91 19 : case MHD_HTTP_NO_CONTENT:
92 19 : break;
93 0 : case MHD_HTTP_FORBIDDEN:
94 0 : sfr.hr.ec = TALER_JSON_get_error_code (json);
95 0 : sfr.hr.hint = TALER_JSON_get_error_hint (json);
96 0 : break;
97 0 : case MHD_HTTP_NOT_FOUND:
98 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
99 : "Server did not find handler at `%s'. Did you configure the correct exchange base URL?\n",
100 : sgfh->url);
101 0 : if (NULL != json)
102 : {
103 0 : sfr.hr.ec = TALER_JSON_get_error_code (json);
104 0 : sfr.hr.hint = TALER_JSON_get_error_hint (json);
105 : }
106 : else
107 : {
108 0 : sfr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
109 0 : sfr.hr.hint = TALER_ErrorCode_get_hint (sfr.hr.ec);
110 : }
111 0 : break;
112 0 : case MHD_HTTP_CONFLICT:
113 0 : sfr.hr.ec = TALER_JSON_get_error_code (json);
114 0 : sfr.hr.hint = TALER_JSON_get_error_hint (json);
115 0 : break;
116 0 : case MHD_HTTP_PRECONDITION_FAILED:
117 0 : sfr.hr.ec = TALER_JSON_get_error_code (json);
118 0 : sfr.hr.hint = TALER_JSON_get_error_hint (json);
119 0 : break;
120 0 : default:
121 : /* unexpected response code */
122 0 : GNUNET_break_op (0);
123 0 : sfr.hr.ec = TALER_JSON_get_error_code (json);
124 0 : sfr.hr.hint = TALER_JSON_get_error_hint (json);
125 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
126 : "Unexpected response code %u/%d for exchange management set global fee\n",
127 : (unsigned int) response_code,
128 : (int) sfr.hr.ec);
129 0 : break;
130 : }
131 19 : if (NULL != sgfh->cb)
132 : {
133 19 : sgfh->cb (sgfh->cb_cls,
134 : &sfr);
135 19 : sgfh->cb = NULL;
136 : }
137 19 : TALER_EXCHANGE_management_set_global_fees_cancel (sgfh);
138 19 : }
139 :
140 :
141 : struct TALER_EXCHANGE_ManagementSetGlobalFeeHandle *
142 19 : TALER_EXCHANGE_management_set_global_fees (
143 : struct GNUNET_CURL_Context *ctx,
144 : const char *exchange_base_url,
145 : struct GNUNET_TIME_Timestamp validity_start,
146 : struct GNUNET_TIME_Timestamp validity_end,
147 : const struct TALER_GlobalFeeSet *fees,
148 : struct GNUNET_TIME_Relative purse_timeout,
149 : struct GNUNET_TIME_Relative history_expiration,
150 : uint32_t purse_account_limit,
151 : const struct TALER_MasterSignatureP *master_sig,
152 : TALER_EXCHANGE_ManagementSetGlobalFeeCallback cb,
153 : void *cb_cls)
154 : {
155 : struct TALER_EXCHANGE_ManagementSetGlobalFeeHandle *sgfh;
156 : CURL *eh;
157 : json_t *body;
158 :
159 19 : sgfh = GNUNET_new (struct TALER_EXCHANGE_ManagementSetGlobalFeeHandle);
160 19 : sgfh->cb = cb;
161 19 : sgfh->cb_cls = cb_cls;
162 19 : sgfh->ctx = ctx;
163 19 : sgfh->url = TALER_url_join (exchange_base_url,
164 : "management/global-fee",
165 : NULL);
166 19 : if (NULL == sgfh->url)
167 : {
168 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
169 : "Could not construct request URL.\n");
170 0 : GNUNET_free (sgfh);
171 0 : return NULL;
172 : }
173 19 : body = GNUNET_JSON_PACK (
174 : GNUNET_JSON_pack_data_auto ("master_sig",
175 : master_sig),
176 : GNUNET_JSON_pack_timestamp ("fee_start",
177 : validity_start),
178 : GNUNET_JSON_pack_timestamp ("fee_end",
179 : validity_end),
180 : TALER_JSON_pack_amount ("history_fee",
181 : &fees->history),
182 : TALER_JSON_pack_amount ("account_fee",
183 : &fees->account),
184 : TALER_JSON_pack_amount ("purse_fee",
185 : &fees->purse),
186 : GNUNET_JSON_pack_time_rel ("purse_timeout",
187 : purse_timeout),
188 : GNUNET_JSON_pack_time_rel ("history_expiration",
189 : history_expiration),
190 : GNUNET_JSON_pack_uint64 ("purse_account_limit",
191 : purse_account_limit));
192 19 : eh = TALER_EXCHANGE_curl_easy_get_ (sgfh->url);
193 38 : if ( (NULL == eh) ||
194 : (GNUNET_OK !=
195 19 : TALER_curl_easy_post (&sgfh->post_ctx,
196 : eh,
197 : body)) )
198 : {
199 0 : GNUNET_break (0);
200 0 : if (NULL != eh)
201 0 : curl_easy_cleanup (eh);
202 0 : json_decref (body);
203 0 : GNUNET_free (sgfh->url);
204 0 : GNUNET_free (sgfh);
205 0 : return NULL;
206 : }
207 19 : json_decref (body);
208 19 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
209 : "Requesting URL '%s'\n",
210 : sgfh->url);
211 38 : sgfh->job = GNUNET_CURL_job_add2 (ctx,
212 : eh,
213 19 : sgfh->post_ctx.headers,
214 : &handle_set_global_fee_finished,
215 : sgfh);
216 19 : if (NULL == sgfh->job)
217 : {
218 0 : TALER_EXCHANGE_management_set_global_fees_cancel (sgfh);
219 0 : return NULL;
220 : }
221 19 : return sgfh;
222 : }
223 :
224 :
225 : void
226 19 : TALER_EXCHANGE_management_set_global_fees_cancel (
227 : struct TALER_EXCHANGE_ManagementSetGlobalFeeHandle *sgfh)
228 : {
229 19 : if (NULL != sgfh->job)
230 : {
231 0 : GNUNET_CURL_job_cancel (sgfh->job);
232 0 : sgfh->job = NULL;
233 : }
234 19 : TALER_curl_easy_post_finished (&sgfh->post_ctx);
235 19 : GNUNET_free (sgfh->url);
236 19 : GNUNET_free (sgfh);
237 19 : }
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