[taler-merchant] 246/277: implement taler-merchant-setup-reserve CLI tool

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grothoff pushed a commit to branch master
in repository merchant.

commit d52356b4ac66bc22f3c7195490ff713668f340b1
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Tue Jun 23 21:47:37 2020 +0200

    implement taler-merchant-setup-reserve CLI tool
---
 .gitignore                                        |   3 +-
 src/merchant-tools/Makefile.am                    |  35 ++--
 src/merchant-tools/taler-merchant-setup-reserve.c | 238 ++++++++++++++++++++++
 3 files changed, 262 insertions(+), 14 deletions(-)

diff --git a/.gitignore b/.gitignore
index 0cb3e84..bd44aa1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -63,4 +63,5 @@ doc/version.texi
 src/merchant-tools/taler-merchant-generate-payments-alt
 src/merchant-tools/taler-merchant-generate-payments
 src/merchant-tools/taler-merchant-benchmark
-/uncrustify.cfg
+uncrustify.cfg
+src/merchant-tools/taler-merchant-setup-reserve
diff --git a/src/merchant-tools/Makefile.am b/src/merchant-tools/Makefile.am
index a78da09..987a089 100644
--- a/src/merchant-tools/Makefile.am
+++ b/src/merchant-tools/Makefile.am
@@ -7,23 +7,12 @@ if USE_COVERAGE
 endif
 
 bin_PROGRAMS = \
+  taler-merchant-benchmark \
   taler-merchant-dbinit \
-  taler-merchant-benchmark
-
-taler_merchant_dbinit_SOURCES = \
-  taler-merchant-dbinit.c
-
-taler_merchant_dbinit_LDADD = \
-  $(LIBGCRYPT_LIBS) \
-  $(top_builddir)/src/backenddb/libtalermerchantdb.la \
-  -lgnunetutil \
-  -ltalerutil \
-  -ltalerpq \
-  $(XLIB)
+  taler-merchant-setup-reserve
 
 taler_merchant_benchmark_SOURCES = \
   taler-merchant-benchmark.c
-
 taler_merchant_benchmark_LDADD = \
   $(top_srcdir)/src/backenddb/libtalermerchantdb.la \
   $(top_srcdir)/src/lib/libtalermerchant.la \
@@ -40,3 +29,23 @@ taler_merchant_benchmark_LDADD = \
   -lgnunetutil \
   -ljansson \
   $(XLIB)
+
+taler_merchant_dbinit_SOURCES = \
+  taler-merchant-dbinit.c
+taler_merchant_dbinit_LDADD = \
+  $(LIBGCRYPT_LIBS) \
+  $(top_builddir)/src/backenddb/libtalermerchantdb.la \
+  -ltalerutil \
+  -ltalerpq \
+  -lgnunetutil \
+  $(XLIB)
+
+taler_merchant_setup_reserve_SOURCES = \
+  taler-merchant-setup-reserve.c
+taler_merchant_setup_reserve_LDADD = \
+  $(LIBGCRYPT_LIBS) \
+  $(top_builddir)/src/lib/libtalermerchant.la \
+  -ltalerutil \
+  -lgnunetcurl \
+  -lgnunetutil \
+  $(XLIB)
diff --git a/src/merchant-tools/taler-merchant-setup-reserve.c 
b/src/merchant-tools/taler-merchant-setup-reserve.c
new file mode 100644
index 0000000..5d5f393
--- /dev/null
+++ b/src/merchant-tools/taler-merchant-setup-reserve.c
@@ -0,0 +1,238 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2020 Taler Systems SA
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation; either version 3, or (at your option) any later version.
+
+  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file merchant-tools/taler-merchant-setup-reserve.c
+ * @brief Create reserve for tipping
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <taler/taler_util.h>
+#include <microhttpd.h>
+#include <gnunet/gnunet_util_lib.h>
+#include "taler_merchant_service.h"
+
+
+/**
+ * Return value from main().
+ */
+static int global_ret;
+
+/**
+ * Initial amount the reserve will be filled with.
+ */
+static struct TALER_Amount initial_amount;
+
+/**
+ * Base URL of the merchant (with instance) to create the reserve for.
+ */
+static char *merchant_base_url;
+
+/**
+ * Base URL of the exchange to create the reserve at.
+ */
+static char *exchange_base_url;
+
+/**
+ * Wire method to use.
+ */
+static char *wire_method;
+
+/**
+ * Operation handle.
+ */
+static struct TALER_MERCHANT_PostReservesHandle *prh;
+
+/**
+ * Our context for making HTTP requests.
+ */
+static struct GNUNET_CURL_Context *ctx;
+
+/**
+ * Reschedule context for #SH_ctx.
+ */
+static struct GNUNET_CURL_RescheduleContext *rc;
+
+
+/**
+ * Shutdown task (invoked when the process is being terminated)
+ *
+ * @param cls NULL
+ */
+static void
+do_shutdown (void *cls)
+{
+  if (NULL != ctx)
+  {
+    GNUNET_CURL_fini (ctx);
+    ctx = NULL;
+  }
+  if (NULL != rc)
+  {
+    GNUNET_CURL_gnunet_rc_destroy (rc);
+    rc = NULL;
+  }
+  if (NULL != prh)
+  {
+    TALER_MERCHANT_reserves_post_cancel (prh);
+    prh = NULL;
+  }
+}
+
+
+/**
+ * Callbacks of this type are used to work the result of submitting a
+ * POST /reserves request to a merchant
+ *
+ * @param cls closure
+ * @param hr HTTP response details
+ * @param reserve_pub public key of the created reserve, NULL on error
+ * @param payto_uri where to make the payment to for filling the reserve, NULL 
on error
+ */
+static void
+result_cb (void *cls,
+           const struct TALER_MERCHANT_HttpResponse *hr,
+           const struct TALER_ReservePublicKeyP *reserve_pub,
+           const char *payto_uri)
+{
+  (void) cls;
+  prh = NULL;
+  switch (hr->http_status)
+  {
+  case MHD_HTTP_OK:
+    {
+      char res_str[sizeof (*reserve_pub) * 2 + 1];
+
+      GNUNET_STRINGS_data_to_string (reserve_pub,
+                                     sizeof (*reserve_pub),
+                                     res_str,
+                                     sizeof (res_str));
+      fprintf (stdout,
+               "%s&subject=%s\n",
+               payto_uri,
+               res_str);
+    }
+    break;
+  default:
+    fprintf (stderr,
+             "Unexpected backend failure: %u/%d\n",
+             hr->http_status,
+             (int) hr->ec);
+    global_ret = 1;
+    break;
+  }
+  GNUNET_SCHEDULER_shutdown ();
+}
+
+
+/**
+ * Main function that will be run.
+ *
+ * @param cls closure
+ * @param args remaining command-line arguments
+ * @param cfgfile name of the configuration file used (for saving, can be 
NULL!)
+ * @param config configuration
+ */
+static void
+run (void *cls,
+     char *const *args,
+     const char *cfgfile,
+     const struct GNUNET_CONFIGURATION_Handle *config)
+{
+  /* setup HTTP client event loop */
+  ctx = GNUNET_CURL_init (&GNUNET_CURL_gnunet_scheduler_reschedule,
+                          &rc);
+  rc = GNUNET_CURL_gnunet_rc_create (ctx);
+  /* setup termination logic */
+  GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
+                                 NULL);
+  /* run actual (async) operation */
+  prh = TALER_MERCHANT_reserves_post (ctx,
+                                      merchant_base_url,
+                                      &initial_amount,
+                                      exchange_base_url,
+                                      wire_method,
+                                      &result_cb,
+                                      NULL);
+  if (NULL == prh)
+  {
+    fprintf (stderr,
+             "Failed to begin operation!\n");
+    global_ret = 2;
+    GNUNET_SCHEDULER_shutdown ();
+    return;
+  }
+}
+
+
+/**
+ * The main function for setting up reserves for tipping.
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc,
+      char *const *argv)
+{
+  struct GNUNET_GETOPT_CommandLineOption options[] = {
+    GNUNET_GETOPT_option_mandatory (
+      TALER_getopt_get_amount ('a',
+                               "amount",
+                               "VALUE",
+                               "amount to be transferred into the reserve",
+                               &initial_amount)),
+    GNUNET_GETOPT_option_mandatory (
+      GNUNET_GETOPT_option_string ('e',
+                                   "exchange-url",
+                                   "URL",
+                                   "base URL of the exchange to create the 
reserve at",
+                                   &exchange_base_url)),
+    GNUNET_GETOPT_option_mandatory (
+      GNUNET_GETOPT_option_string ('m',
+                                   "merchant-url",
+                                   "URL",
+                                   "base URL of the merchant backend's REST 
API",
+                                   &merchant_base_url)),
+    GNUNET_GETOPT_option_mandatory (
+      GNUNET_GETOPT_option_string ('w',
+                                   "wire-method",
+                                   "METHOD",
+                                   "wire method to use for the wire transfer 
(i.e. IBAN)",
+                                   &wire_method)),
+    GNUNET_GETOPT_OPTION_END
+  };
+
+  /* force linker to link against libtalerutil; if we do
+     not do this, the linker may "optimize" libtalerutil
+     away and skip #TALER_OS_init(), which we do need */
+  (void) TALER_project_data_default ();
+  GNUNET_assert (GNUNET_OK ==
+                 GNUNET_log_setup ("taler-merchant-setup-reserve",
+                                   "INFO",
+                                   NULL));
+  if (GNUNET_OK !=
+      GNUNET_PROGRAM_run (argc, argv,
+                          "taler-merchant-setup-reserve",
+                          "Setup reserve for tipping",
+                          options,
+                          &run, NULL))
+    return 3;
+  return global_ret;
+}
+
+
+/* end of taler-merchant-setup-reserve.c */

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