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_wire_fee.c
19 : * @brief functions to set wire 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_ManagementSetWireFeeHandle
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_ManagementSetWireFeeCallback 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/wire 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 29 : handle_set_wire_fee_finished (void *cls,
78 : long response_code,
79 : const void *response)
80 : {
81 29 : struct TALER_EXCHANGE_ManagementSetWireFeeHandle *swfh = cls;
82 29 : const json_t *json = response;
83 29 : struct TALER_EXCHANGE_ManagementSetWireFeeResponse swr = {
84 29 : .hr.http_status = (unsigned int) response_code,
85 : .hr.reply = json
86 : };
87 :
88 29 : swfh->job = NULL;
89 29 : switch (response_code)
90 : {
91 25 : case MHD_HTTP_NO_CONTENT:
92 25 : break;
93 2 : case MHD_HTTP_FORBIDDEN:
94 2 : swr.hr.ec = TALER_JSON_get_error_code (json);
95 2 : swr.hr.hint = TALER_JSON_get_error_hint (json);
96 2 : 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 : swfh->url);
101 0 : if (NULL != json)
102 : {
103 0 : swr.hr.ec = TALER_JSON_get_error_code (json);
104 0 : swr.hr.hint = TALER_JSON_get_error_hint (json);
105 : }
106 : else
107 : {
108 0 : swr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
109 0 : swr.hr.hint = TALER_ErrorCode_get_hint (swr.hr.ec);
110 : }
111 0 : break;
112 2 : case MHD_HTTP_CONFLICT:
113 2 : swr.hr.ec = TALER_JSON_get_error_code (json);
114 2 : swr.hr.hint = TALER_JSON_get_error_hint (json);
115 2 : break;
116 0 : case MHD_HTTP_PRECONDITION_FAILED:
117 0 : swr.hr.ec = TALER_JSON_get_error_code (json);
118 0 : swr.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 : swr.hr.ec = TALER_JSON_get_error_code (json);
124 0 : swr.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 wire fee\n",
127 : (unsigned int) response_code,
128 : (int) swr.hr.ec);
129 0 : break;
130 : }
131 29 : if (NULL != swfh->cb)
132 : {
133 29 : swfh->cb (swfh->cb_cls,
134 : &swr);
135 29 : swfh->cb = NULL;
136 : }
137 29 : TALER_EXCHANGE_management_set_wire_fees_cancel (swfh);
138 29 : }
139 :
140 :
141 : struct TALER_EXCHANGE_ManagementSetWireFeeHandle *
142 29 : TALER_EXCHANGE_management_set_wire_fees (
143 : struct GNUNET_CURL_Context *ctx,
144 : const char *exchange_base_url,
145 : const char *wire_method,
146 : struct GNUNET_TIME_Timestamp validity_start,
147 : struct GNUNET_TIME_Timestamp validity_end,
148 : const struct TALER_WireFeeSet *fees,
149 : const struct TALER_MasterSignatureP *master_sig,
150 : TALER_EXCHANGE_ManagementSetWireFeeCallback cb,
151 : void *cb_cls)
152 : {
153 : struct TALER_EXCHANGE_ManagementSetWireFeeHandle *swfh;
154 : CURL *eh;
155 : json_t *body;
156 :
157 29 : swfh = GNUNET_new (struct TALER_EXCHANGE_ManagementSetWireFeeHandle);
158 29 : swfh->cb = cb;
159 29 : swfh->cb_cls = cb_cls;
160 29 : swfh->ctx = ctx;
161 29 : swfh->url = TALER_url_join (exchange_base_url,
162 : "management/wire-fee",
163 : NULL);
164 29 : if (NULL == swfh->url)
165 : {
166 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
167 : "Could not construct request URL.\n");
168 0 : GNUNET_free (swfh);
169 0 : return NULL;
170 : }
171 29 : body = GNUNET_JSON_PACK (
172 : GNUNET_JSON_pack_string ("wire_method",
173 : wire_method),
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 ("closing_fee",
181 : &fees->closing),
182 : TALER_JSON_pack_amount ("wire_fee",
183 : &fees->wire));
184 29 : eh = TALER_EXCHANGE_curl_easy_get_ (swfh->url);
185 58 : if ( (NULL == eh) ||
186 : (GNUNET_OK !=
187 29 : TALER_curl_easy_post (&swfh->post_ctx,
188 : eh,
189 : body)) )
190 : {
191 0 : GNUNET_break (0);
192 0 : if (NULL != eh)
193 0 : curl_easy_cleanup (eh);
194 0 : json_decref (body);
195 0 : GNUNET_free (swfh->url);
196 0 : GNUNET_free (swfh);
197 0 : return NULL;
198 : }
199 29 : json_decref (body);
200 29 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
201 : "Requesting URL '%s'\n",
202 : swfh->url);
203 58 : swfh->job = GNUNET_CURL_job_add2 (ctx,
204 : eh,
205 29 : swfh->post_ctx.headers,
206 : &handle_set_wire_fee_finished,
207 : swfh);
208 29 : if (NULL == swfh->job)
209 : {
210 0 : TALER_EXCHANGE_management_set_wire_fees_cancel (swfh);
211 0 : return NULL;
212 : }
213 29 : return swfh;
214 : }
215 :
216 :
217 : void
218 29 : TALER_EXCHANGE_management_set_wire_fees_cancel (
219 : struct TALER_EXCHANGE_ManagementSetWireFeeHandle *swfh)
220 : {
221 29 : if (NULL != swfh->job)
222 : {
223 0 : GNUNET_CURL_job_cancel (swfh->job);
224 0 : swfh->job = NULL;
225 : }
226 29 : TALER_curl_easy_post_finished (&swfh->post_ctx);
227 29 : GNUNET_free (swfh->url);
228 29 : GNUNET_free (swfh);
229 29 : }
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