diff options
Diffstat (limited to 'src/mint-lib/mint_api_wire_deposits.c')
| -rw-r--r-- | src/mint-lib/mint_api_wire_deposits.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/src/mint-lib/mint_api_wire_deposits.c b/src/mint-lib/mint_api_wire_deposits.c new file mode 100644 index 000000000..f71c5b696 --- /dev/null +++ b/src/mint-lib/mint_api_wire_deposits.c @@ -0,0 +1,284 @@ +/* + This file is part of TALER + Copyright (C) 2014, 2015, 2016 GNUnet e.V. + + 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, If not, see + <http://www.gnu.org/licenses/> +*/ +/** + * @file mint-lib/mint_api_wire_deposits.c + * @brief Implementation of the /wire/deposits request of the mint's HTTP API + * @author Christian Grothoff + */ +#include "platform.h" +#include <curl/curl.h> +#include <jansson.h> +#include <microhttpd.h> /* just for HTTP status codes */ +#include <gnunet/gnunet_util_lib.h> +#include "taler_mint_service.h" +#include "mint_api_common.h" +#include "mint_api_json.h" +#include "mint_api_context.h" +#include "mint_api_handle.h" +#include "taler_signatures.h" + + +/** + * @brief A /wire/deposits Handle + */ +struct TALER_MINT_WireDepositsHandle +{ + + /** + * The connection to mint this request handle will use + */ + struct TALER_MINT_Handle *mint; + + /** + * The url for this request. + */ + char *url; + + /** + * Handle for the request. + */ + struct MAC_Job *job; + + /** + * Function to call with the result. + */ + TALER_MINT_WireDepositsCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Download buffer + */ + struct MAC_DownloadBuffer db; + +}; + + +/** + * Function called when we're done processing the + * HTTP /wire/deposits request. + * + * @param cls the `struct TALER_MINT_WireDepositsHandle` + * @param eh the curl request handle + */ +static void +handle_wire_deposits_finished (void *cls, + CURL *eh) +{ + struct TALER_MINT_WireDepositsHandle *wdh = cls; + long response_code; + json_t *json; + + wdh->job = NULL; + json = MAC_download_get_result (&wdh->db, + eh, + &response_code); + switch (response_code) + { + case 0: + break; + case MHD_HTTP_OK: + { + json_t *details_j; + struct GNUNET_HashCode h_wire; + struct TALER_Amount total_amount; + struct TALER_MerchantPublicKeyP merchant_pub; + unsigned int num_details; + struct MAJ_Specification spec[] = { + MAJ_spec_fixed_auto ("H_wire", &h_wire), + MAJ_spec_fixed_auto ("merchant_pub", &merchant_pub), + MAJ_spec_amount ("total_amount", &total_amount), + MAJ_spec_json ("details", &details_j), + MAJ_spec_end + }; + + if (GNUNET_OK != + MAJ_parse_json (json, + spec)) + { + GNUNET_break_op (0); + response_code = 0; + break; + } + num_details = json_array_size (details_j); + { + struct TALER_WireDepositDetails details[num_details]; + unsigned int i; + + for (i=0;i<num_details;i++) + { + struct TALER_WireDepositDetails *detail = &details[i]; + struct json_t *detail_j = json_array_get (details_j, i); + struct MAJ_Specification spec_detail[] = { + MAJ_spec_fixed_auto ("H_contract", &detail->h_contract), + MAJ_spec_amount ("deposit_value", &detail->coin_value), + MAJ_spec_amount ("deposit_fee", &detail->coin_fee), + MAJ_spec_uint64 ("transaction_id", &detail->transaction_id), + MAJ_spec_fixed_auto ("coin_pub", &detail->coin_pub), + MAJ_spec_end + }; + + if (GNUNET_OK != + MAJ_parse_json (detail_j, + spec_detail)) + { + GNUNET_break_op (0); + response_code = 0; + break; + } + } + if (0 == response_code) + break; + wdh->cb (wdh->cb_cls, + response_code, + json, + &h_wire, + &total_amount, + num_details, + details); + json_decref (json); + TALER_MINT_wire_deposits_cancel (wdh); + return; + } + } + break; + case MHD_HTTP_BAD_REQUEST: + /* This should never happen, either us or the mint is buggy + (or API version conflict); just pass JSON reply to the application */ + break; + case MHD_HTTP_UNAUTHORIZED: + /* Nothing really to verify, mint says one of the signatures is + invalid; as we checked them, this should never happen, we + should pass the JSON reply to the application */ + break; + case MHD_HTTP_NOT_FOUND: + /* Mint does not know about transaction; + we should pass the reply to the application */ + break; + case MHD_HTTP_INTERNAL_SERVER_ERROR: + /* Server had an internal issue; we should retry, but this API + leaves this to the application */ + break; + default: + /* unexpected response code */ + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u\n", + response_code); + GNUNET_break (0); + response_code = 0; + break; + } + wdh->cb (wdh->cb_cls, + response_code, + json, + NULL, NULL, 0, NULL); + json_decref (json); + TALER_MINT_wire_deposits_cancel (wdh); +} + + +/** + * Query the mint about which transactions were combined + * to create a wire transfer. + * + * @param mint mint to query + * @param wtid raw wire transfer identifier to get information about + * @param cb callback to call + * @param cb_cls closure for @a cb + * @return handle to cancel operation + */ +struct TALER_MINT_WireDepositsHandle * +TALER_MINT_wire_deposits (struct TALER_MINT_Handle *mint, + const struct TALER_WireTransferIdentifierRawP *wtid, + TALER_MINT_WireDepositsCallback cb, + void *cb_cls) +{ + struct TALER_MINT_WireDepositsHandle *wdh; + struct TALER_MINT_Context *ctx; + char *buf; + char *path; + CURL *eh; + + if (GNUNET_YES != + MAH_handle_is_ready (mint)) + { + GNUNET_break (0); + return NULL; + } + + wdh = GNUNET_new (struct TALER_MINT_WireDepositsHandle); + wdh->mint = mint; + wdh->cb = cb; + wdh->cb_cls = cb_cls; + + buf = GNUNET_STRINGS_data_to_string_alloc (wtid, + sizeof (struct TALER_WireTransferIdentifierRawP)); + GNUNET_asprintf (&path, + "/wire/deposits?wtid=%s", + buf); + wdh->url = MAH_path_to_url (wdh->mint, + path); + GNUNET_free (buf); + GNUNET_free (path); + + eh = curl_easy_init (); + GNUNET_assert (CURLE_OK == + curl_easy_setopt (eh, + CURLOPT_URL, + wdh->url)); + GNUNET_assert (CURLE_OK == + curl_easy_setopt (eh, + CURLOPT_WRITEFUNCTION, + &MAC_download_cb)); + GNUNET_assert (CURLE_OK == + curl_easy_setopt (eh, + CURLOPT_WRITEDATA, + &wdh->db)); + ctx = MAH_handle_to_context (mint); + wdh->job = MAC_job_add (ctx, + eh, + GNUNET_YES, + &handle_wire_deposits_finished, + wdh); + return wdh; +} + + +/** + * Cancel wire deposits request. This function cannot be used on a request + * handle if a response is already served for it. + * + * @param wdh the wire deposits request handle + */ +void +TALER_MINT_wire_deposits_cancel (struct TALER_MINT_WireDepositsHandle *wdh) +{ + if (NULL != wdh->job) + { + MAC_job_cancel (wdh->job); + wdh->job = NULL; + } + GNUNET_free_non_null (wdh->db.buf); + GNUNET_free (wdh->url); + GNUNET_free (wdh); +} + + +/* end of mint_api_wire_deposits.c */ |