1 files changed, 237 insertions, 0 deletions
diff --git a/src/backend/taler-merchant-httpd_track-deposit.c b/src/backend/taler-merchant-httpd_track-deposit.c
new file mode 100644
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--- /dev/null
+++ b/src/backend/taler-merchant-httpd_track-deposit.c
@@ -0,0 +1,237 @@
+/*
+  This file is part of TALER
+  (C) 2014, 2015, 2016 INRIA
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU Affero 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, If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file backend/taler-merchant-httpd_track-deposit.c
+ * @brief implement API for tracking deposits and wire transfers
+ * @author Marcello Stanisci
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <jansson.h>
+#include <taler/taler_signatures.h>
+#include <taler/taler_json_lib.h>
+#include "taler-merchant-httpd.h"
+#include "taler-merchant-httpd_mhd.h"
+#include "taler-merchant-httpd_parsing.h"
+#include "taler-merchant-httpd_auditors.h"
+#include "taler-merchant-httpd_exchanges.h"
+#include "taler-merchant-httpd_responses.h"
+#include "taler-merchant-httpd_track_deposit.h"
+
+
+/**
+ * How long to wait before giving up processing with the exchange?
+ */
+#define TRACK_TIMEOUT (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30))
+
+extern char *TMH_merchant_currency_string;
+
+
+/**
+ * Context used for handing /track/deposit requests.
+ */
+struct DepositTrackContext
+{
+
+  /**
+   * This MUST be first!
+   */
+  struct TM_HandlerContext hc;
+
+  /**
+   * Handle to the exchange.
+   */
+  struct TALER_EXCHANGE_Handle *eh;
+
+  /**
+   * Handle for the /wire/deposits request.
+   */
+  struct TALER_EXCHANGE_WireDepositsHandle *wdh;
+
+  /**
+   *
+   */
+  struct TALER_WireDepositDetails *details;
+
+  /**
+   * Argument for the /wire/deposits request.
+   */
+  struct TALER_WireTransferIdentifierRawP wtid;
+
+  /**
+   * Length of the @e details array.
+   */
+  unsigned int details_length;
+
+  /**
+   * HTTP connection we are handling.
+   */
+  struct MHD_Connection *connection;
+
+  /**
+   * Response code to return.
+   */
+  unsigned int response_code;
+
+  /**
+   *
+   */
+  json_t *json;
+
+  /**
+   * Error message.
+   */
+  const char *error;
+
+};
+
+
+/**
+ * Function called with detailed wire transfer data, including all
+ * of the coin transactions that were combined into the wire transfer.
+ *
+ * @param cls closure
+ * @param http_status HTTP status code we got, 0 on exchange protocol violation
+ * @param json original json reply (may include signatures, those have then been
+ *        validated already)
+ * @param wtid extracted wire transfer identifier, or NULL if the exchange could
+ *             not provide any (set only if @a http_status is #MHD_HTTP_OK)
+ * @param total_amount total amount of the wire transfer, or NULL if the exchange could
+ *             not provide any @a wtid (set only if @a http_status is #MHD_HTTP_OK)
+ * @param details_length length of the @a details array
+ * @param details array with details about the combined transactions
+ */
+static void
+wire_deposit_cb (void *cls,
+                 unsigned int http_status,
+                 const json_t *json,
+                 const struct GNUNET_HashCode *h_wire,
+                 const struct TALER_Amount *total_amount,
+                 unsigned int details_length,
+                 const struct TALER_WireDepositDetails *details)
+{
+  struct DepositTrackContext *rctx = cls;
+  // unsigned int i;
+
+  rctx->wdh = NULL;
+  if (NULL == total_amount)
+  {
+    rctx->error = "failed to obtain /wire/deposit response from exchange";
+    rctx->json = json_incref ((json_t *) json);
+    rctx->response_code = http_status;
+    MHD_resume_connection (rctx->connection);
+    return;
+  }
+  rctx->details_length = details_length;
+  rctx->details = GNUNET_new_array (details_length,
+                                    struct TALER_WireDepositDetails);
+  memcpy (rctx->details,
+          details,
+          details_length * sizeof (struct TALER_WireDepositDetails));
+  GNUNET_break (0);
+  /* FIXME: now check that these details match what we have in
+     our database... */
+
+
+}
+
+
+/**
+ * Function called with information about who is auditing
+ * a particular exchange and what key the exchange is using.
+ *
+ * @param cls closure
+ * @param keys information about the various keys used
+ *        by the exchange, NULL if /keys failed
+ */
+static void
+cert_cb (void *cls,
+         const struct TALER_EXCHANGE_Keys *keys)
+{
+  struct DepositTrackContext *rctx = cls;
+
+  if (NULL == keys)
+  {
+    rctx->error = "failed to obtain /keys from exchange";
+    rctx->response_code = MHD_HTTP_SERVICE_UNAVAILABLE;
+    MHD_resume_connection (rctx->connection);
+    return;
+  }
+  rctx->wdh = TALER_EXCHANGE_wire_deposits (rctx->eh,
+                                            &rctx->wtid,
+                                            &wire_deposit_cb,
+                                            rctx);
+}
+
+
+/**
+ * Manages a /track/wtid call, thus it calls the /track/deposit
+ * offered by the exchange in order to return the set of deposits
+ * (of coins) associated with a given wire transfer.
+ *
+ * @param rh context of the handler
+ * @param connection the MHD connection to handle
+ * @param[in,out] connection_cls the connection's closure (can be updated)
+ * @param upload_data upload data
+ * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
+ * @return MHD result code
+ */
+int
+MH_handler_track_deposit (struct TMH_RequestHandler *rh,
+                          struct MHD_Connection *connection,
+                          void **connection_cls,
+                          const char *upload_data,
+                          size_t *upload_data_size)
+{
+  struct DepositTrackContext *rctx;
+  const char *str;
+  const char *uri;
+
+  rctx = *connection_cls;
+  if (NULL != rctx)
+  {
+    // ...
+  }
+  uri = MHD_lookup_connection_value (connection,
+                                     MHD_GET_ARGUMENT_KIND,
+                                     "exchange");
+  if (NULL == uri)
+    return TMH_RESPONSE_reply_external_error (connection,
+                                              "exchange argument missing");
+  str = MHD_lookup_connection_value (connection,
+                                     MHD_GET_ARGUMENT_KIND,
+                                     "wtid");
+  if (NULL == str)
+    return TMH_RESPONSE_reply_external_error (connection,
+                                              "wtid argument missing");
+  if (GNUNET_OK !=
+      GNUNET_STRINGS_string_to_data (str,
+                                     strlen (str),
+                                     &rctx->wtid,
+                                     sizeof (rctx->wtid)))
+    return TMH_RESPONSE_reply_external_error (connection,
+                                              "wtid argument malformed");
+  rctx->eh = TALER_EXCHANGE_connect (NULL /* FIXME */,
+                                     uri,
+                                     &cert_cb,
+                                     rctx,
+                                     TALER_EXCHANGE_OPTION_END);
+
+  GNUNET_break (0);
+  return MHD_NO;
+}
+
+/* end of taler-merchant-httpd_track-deposit.c */