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-drain.c
19 : * @brief functions to drain profits from an exchange account
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-drain.h"
26 : #include "exchange_api_curl_defaults.h"
27 : #include "taler/taler_curl_lib.h"
28 :
29 :
30 : struct TALER_EXCHANGE_PostManagementDrainHandle
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_PostManagementDrainCallback cb;
57 :
58 : /**
59 : * Closure for @a cb.
60 : */
61 : TALER_EXCHANGE_POST_MANAGEMENT_DRAIN_RESULT_CLOSURE *cb_cls;
62 :
63 : /**
64 : * Reference to the execution context.
65 : */
66 : struct GNUNET_CURL_Context *ctx;
67 :
68 : /**
69 : * Wire transfer identifier to use.
70 : */
71 : struct TALER_WireTransferIdentifierRawP wtid;
72 :
73 : /**
74 : * Total to transfer.
75 : */
76 : struct TALER_Amount amount;
77 :
78 : /**
79 : * When was the request created.
80 : */
81 : struct GNUNET_TIME_Timestamp date;
82 :
83 : /**
84 : * Configuration section identifying account to debit.
85 : */
86 : char *account_section;
87 :
88 : /**
89 : * Payto URI of the account to credit.
90 : */
91 : char *payto_uri_str;
92 :
93 : /**
94 : * Signature affirming the operation.
95 : */
96 : struct TALER_MasterSignatureP master_sig;
97 :
98 : };
99 :
100 :
101 : /**
102 : * Function called when we're done processing the
103 : * HTTP POST /management/drain request.
104 : *
105 : * @param cls the `struct TALER_EXCHANGE_PostManagementDrainHandle`
106 : * @param response_code HTTP response code, 0 on error
107 : * @param response response body, NULL if not in JSON
108 : */
109 : static void
110 0 : handle_drain_finished (void *cls,
111 : long response_code,
112 : const void *response)
113 : {
114 0 : struct TALER_EXCHANGE_PostManagementDrainHandle *pmdh = cls;
115 0 : const json_t *json = response;
116 0 : struct TALER_EXCHANGE_PostManagementDrainResponse res = {
117 0 : .hr.http_status = (unsigned int) response_code,
118 : .hr.reply = json
119 : };
120 :
121 0 : pmdh->job = NULL;
122 0 : switch (response_code)
123 : {
124 0 : case MHD_HTTP_NO_CONTENT:
125 0 : break;
126 0 : case MHD_HTTP_FORBIDDEN:
127 0 : res.hr.ec = TALER_JSON_get_error_code (json);
128 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
129 0 : break;
130 0 : case MHD_HTTP_INTERNAL_SERVER_ERROR:
131 0 : res.hr.ec = TALER_JSON_get_error_code (json);
132 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
133 0 : break;
134 0 : default:
135 : /* unexpected response code */
136 0 : GNUNET_break_op (0);
137 0 : res.hr.ec = TALER_JSON_get_error_code (json);
138 0 : res.hr.hint = TALER_JSON_get_error_hint (json);
139 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
140 : "Unexpected response code %u/%d for exchange management drain profits\n",
141 : (unsigned int) response_code,
142 : (int) res.hr.ec);
143 0 : break;
144 : }
145 0 : if (NULL != pmdh->cb)
146 : {
147 0 : pmdh->cb (pmdh->cb_cls,
148 : &res);
149 0 : pmdh->cb = NULL;
150 : }
151 0 : TALER_EXCHANGE_post_management_drain_cancel (pmdh);
152 0 : }
153 :
154 :
155 : struct TALER_EXCHANGE_PostManagementDrainHandle *
156 0 : TALER_EXCHANGE_post_management_drain_create (
157 : struct GNUNET_CURL_Context *ctx,
158 : const char *url,
159 : const struct TALER_WireTransferIdentifierRawP *wtid,
160 : const struct TALER_Amount *amount,
161 : struct GNUNET_TIME_Timestamp date,
162 : const char *account_section,
163 : const struct TALER_FullPayto payto_uri,
164 : const struct TALER_MasterSignatureP *master_sig)
165 : {
166 : struct TALER_EXCHANGE_PostManagementDrainHandle *pmdh;
167 :
168 0 : pmdh = GNUNET_new (struct TALER_EXCHANGE_PostManagementDrainHandle);
169 0 : pmdh->ctx = ctx;
170 0 : pmdh->base_url = GNUNET_strdup (url);
171 0 : pmdh->wtid = *wtid;
172 0 : pmdh->amount = *amount;
173 0 : pmdh->date = date;
174 0 : pmdh->account_section = GNUNET_strdup (account_section);
175 0 : pmdh->payto_uri_str = GNUNET_strdup (payto_uri.full_payto);
176 0 : pmdh->master_sig = *master_sig;
177 0 : return pmdh;
178 : }
179 :
180 :
181 : enum TALER_ErrorCode
182 0 : TALER_EXCHANGE_post_management_drain_start (
183 : struct TALER_EXCHANGE_PostManagementDrainHandle *pmdh,
184 : TALER_EXCHANGE_PostManagementDrainCallback cb,
185 : TALER_EXCHANGE_POST_MANAGEMENT_DRAIN_RESULT_CLOSURE *cb_cls)
186 : {
187 : CURL *eh;
188 : json_t *body;
189 0 : struct TALER_FullPayto payto_uri = {
190 0 : .full_payto = pmdh->payto_uri_str
191 : };
192 :
193 0 : pmdh->cb = cb;
194 0 : pmdh->cb_cls = cb_cls;
195 0 : pmdh->url = TALER_url_join (pmdh->base_url,
196 : "management/drain",
197 : NULL);
198 0 : if (NULL == pmdh->url)
199 : {
200 0 : GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
201 : "Could not construct request URL.\n");
202 0 : return TALER_EC_GENERIC_CONFIGURATION_INVALID;
203 : }
204 0 : body = GNUNET_JSON_PACK (
205 : GNUNET_JSON_pack_string ("debit_account_section",
206 : pmdh->account_section),
207 : TALER_JSON_pack_full_payto ("credit_payto_uri",
208 : payto_uri),
209 : GNUNET_JSON_pack_data_auto ("wtid",
210 : &pmdh->wtid),
211 : GNUNET_JSON_pack_data_auto ("master_sig",
212 : &pmdh->master_sig),
213 : GNUNET_JSON_pack_timestamp ("date",
214 : pmdh->date),
215 : TALER_JSON_pack_amount ("amount",
216 : &pmdh->amount));
217 0 : eh = TALER_EXCHANGE_curl_easy_get_ (pmdh->url);
218 0 : if ( (NULL == eh) ||
219 : (GNUNET_OK !=
220 0 : TALER_curl_easy_post (&pmdh->post_ctx,
221 : eh,
222 : body)) )
223 : {
224 0 : GNUNET_break (0);
225 0 : if (NULL != eh)
226 0 : curl_easy_cleanup (eh);
227 0 : json_decref (body);
228 0 : GNUNET_free (pmdh->url);
229 0 : pmdh->url = NULL;
230 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
231 : }
232 0 : json_decref (body);
233 0 : GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
234 : "Requesting URL '%s'\n",
235 : pmdh->url);
236 0 : pmdh->job = GNUNET_CURL_job_add2 (pmdh->ctx,
237 : eh,
238 0 : pmdh->post_ctx.headers,
239 : &handle_drain_finished,
240 : pmdh);
241 0 : if (NULL == pmdh->job)
242 : {
243 0 : TALER_curl_easy_post_finished (&pmdh->post_ctx);
244 0 : GNUNET_free (pmdh->url);
245 0 : pmdh->url = NULL;
246 0 : return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
247 : }
248 0 : return TALER_EC_NONE;
249 : }
250 :
251 :
252 : void
253 0 : TALER_EXCHANGE_post_management_drain_cancel (
254 : struct TALER_EXCHANGE_PostManagementDrainHandle *pmdh)
255 : {
256 0 : if (NULL != pmdh->job)
257 : {
258 0 : GNUNET_CURL_job_cancel (pmdh->job);
259 0 : pmdh->job = NULL;
260 : }
261 0 : TALER_curl_easy_post_finished (&pmdh->post_ctx);
262 0 : GNUNET_free (pmdh->account_section);
263 0 : GNUNET_free (pmdh->payto_uri_str);
264 0 : GNUNET_free (pmdh->url);
265 0 : GNUNET_free (pmdh->base_url);
266 0 : GNUNET_free (pmdh);
267 0 : }
268 :
269 :
270 : /* end of exchange_api_post-management-drain.c */
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