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authorChristian Grothoff <christian@grothoff.org>2020-11-28 18:56:29 +0100
committerChristian Grothoff <christian@grothoff.org>2020-11-28 18:56:29 +0100
commitb65a2f77eb19b23063a5b73bc9ce5fb2e3622431 (patch)
tree99b8347db0d2d9f45cf63ecf3553723018e682ea /src
parent3d8abcc041aca59426fa92c1f164236f295ac847 (diff)
downloadexchange-b65a2f77eb19b23063a5b73bc9ce5fb2e3622431.tar.gz
exchange-b65a2f77eb19b23063a5b73bc9ce5fb2e3622431.tar.bz2
exchange-b65a2f77eb19b23063a5b73bc9ce5fb2e3622431.zip
sketch logic for wire-fee management endpoint
Diffstat (limited to 'src')
-rw-r--r--src/exchange/taler-exchange-httpd_management_wire_fees.c276
-rw-r--r--src/include/taler_exchangedb_plugin.h41
2 files changed, 311 insertions, 6 deletions
diff --git a/src/exchange/taler-exchange-httpd_management_wire_fees.c b/src/exchange/taler-exchange-httpd_management_wire_fees.c
new file mode 100644
index 00000000..dca489c6
--- /dev/null
+++ b/src/exchange/taler-exchange-httpd_management_wire_fees.c
@@ -0,0 +1,276 @@
+/*
+ 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 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License along with
+ TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file taler-exchange-httpd_management_wire_fees.c
+ * @brief Handle request to add wire fee details
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <gnunet/gnunet_util_lib.h>
+#include <gnunet/gnunet_json_lib.h>
+#include <jansson.h>
+#include <microhttpd.h>
+#include <pthread.h>
+#include "taler_json_lib.h"
+#include "taler_mhd_lib.h"
+#include "taler-exchange-httpd_refund.h"
+#include "taler-exchange-httpd_responses.h"
+#include "taler-exchange-httpd_keystate.h"
+
+/**
+ * Closure for the #add_fee transaction.
+ */
+struct AddFeeContext
+{
+ /**
+ * Fee's signature affirming the #TALER_SIGNATURE_MASTER_WIRE_FEES operation.
+ */
+ struct TALER_MasterSignatureP master_sig;
+
+ /**
+ * Wire method this is about.
+ */
+ const char *wire_method;
+
+ /**
+ * Starting period.
+ */
+ struct GNUNET_TIME_Absolute start_time;
+
+ /**
+ * End of period.
+ */
+ struct GNUNET_TIME_Absolute end_time;
+
+ /**
+ * Wire fee amount.
+ */
+ struct TALER_Amount wire_fee;
+
+ /**
+ * Closing fee amount.
+ */
+ struct TALER_Amount closing_fee;
+
+};
+
+
+/**
+ * Function implementing database transaction to add a fee. Runs the
+ * transaction logic; IF it returns a non-error code, the transaction logic
+ * MUST NOT queue a MHD response. IF it returns an hard error, the
+ * transaction logic MUST queue a MHD response and set @a mhd_ret. IF it
+ * returns the soft error code, the function MAY be called again to retry and
+ * MUST not queue a MHD response.
+ *
+ * @param cls closure with a `struct AddFeeContext`
+ * @param connection MHD request which triggered the transaction
+ * @param session database session to use
+ * @param[out] mhd_ret set to MHD response status for @a connection,
+ * if transaction failed (!)
+ * @return transaction status
+ */
+static enum GNUNET_DB_QueryStatus
+add_fee (void *cls,
+ struct MHD_Connection *connection,
+ struct TALER_EXCHANGEDB_Session *session,
+ MHD_RESULT *mhd_ret)
+{
+ struct AddFeeContext *afc = cls;
+ enum GNUNET_DB_QueryStatus qs;
+ struct TALER_Amount wire_fee;
+ struct TALER_Amount closing_fee;
+
+ qs = TEH_plugin->lookup_wire_fee (
+ TEH_plugin->cls,
+ session,
+ aws->wire_method,
+ aws->start_time,
+ aws->end_time,
+ &wire_fee,
+ &closing_fee);
+ if (qs < 0)
+ {
+ if (GNUNET_DB_STATUS_SOFT_ERROR == qs)
+ return qs;
+ GNUNET_break (0);
+ *mhd_ret = TALER_MHD_reply_with_error (connection,
+ MHD_HTTP_INTERNAL_SERVER_ERROR,
+ TALER_EC_GENERIC_DB_LOOKUP_FAILED,
+ "lookup wire fee");
+ return qs;
+ }
+ if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS != qs)
+ {
+ if ( (GNUNET_OK ==
+ TALER_amount_is_valid (&wire_fee)) &&
+ (0 ==
+ TALER_amount_cmp (&wire_fee,
+ &afc->wire_fee)) &&
+ (0 ==
+ TALER_amount_cmp (&closing_fee,
+ &afc->closing_fee)) )
+ {
+ /* this will trigger the 'success' response */
+ return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
+ }
+ else
+ {
+ *mhd_ret = TALER_MHD_reply_with_error (connection,
+ MHD_HTTP_CONFLICT,
+ TALER_EC_XXX,
+ NULL);
+ }
+ return GNUNET_DB_STATUS_HARD_ERROR;
+ }
+
+ qs = TEH_plugin->insert_wire_fee (
+ TEH_plugin->cls,
+ session,
+ aws->wire_method,
+ aws->start_time,
+ aws->end_time,
+ &aws->wire_fee,
+ &aws->closing_fee,
+ &aws->master_sig);
+ if (qs < 0)
+ {
+ if (GNUNET_DB_STATUS_SOFT_ERROR == qs)
+ return qs;
+ GNUNET_break (0);
+ *mhd_ret = TALER_MHD_reply_with_error (connection,
+ MHD_HTTP_INTERNAL_SERVER_ERROR,
+ TALER_EC_GENERIC_DB_STORE_FAILED,
+ "insert fee");
+ return qs;
+ }
+ return qs;
+}
+
+
+/**
+ * Handle a POST "/management/wire-fees" request.
+ *
+ * @param connection the MHD connection to handle
+ * @param root uploaded JSON data
+ * @return MHD result code
+ */
+MHD_RESULT
+TEH_handler_management_post_wire_fees (
+ struct MHD_Connection *connection,
+ const json_t *root)
+{
+ struct AddFeeContext afc;
+ struct GNUNET_JSON_Specification spec[] = {
+ GNUNET_JSON_spec_fixed_auto ("master_sig",
+ &afc.master_sig),
+ GNUNET_JSON_spec_string ("wire_method",
+ &afc.wire_method),
+ TALER_JSON_spec_time_abs ("fee_start",
+ &afc.start_time),
+ TALER_JSON_spec_time_abs ("fee_end",
+ &afc.end_time),
+ TALER_JSON_spec_amount ("closing_fee",
+ &afc.closing_fee),
+ TALER_JSON_spec_amount ("wire_fee",
+ &afc.wire_fee),
+ GNUNET_JSON_spec_end ()
+ };
+ enum GNUNET_DB_QueryStatus qs;
+
+ {
+ enum GNUNET_GenericReturnValue res;
+
+ res = TALER_MHD_parse_json_data (connection,
+ root,
+ spec);
+ if (GNUNET_SYSERR == res)
+ return MHD_NO; /* hard failure */
+ if (GNUNET_NO == res)
+ return MHD_YES; /* failure */
+ }
+
+ if (0 !=
+ TALER_amount_cmp_currency (&afc.closing_fee,
+ &afc.wire_fee))
+ {
+ /* currencies of the two fees must be identical */
+ GNUNET_break_op (0);
+ return TALER_MHD_reply_with_error (connection,
+ MHD_HTTP_BAD_REQUEST,
+ TALER_EC_GENERIC_BAD_CURRENCY,
+ NULL);
+ }
+ if (0 !=
+ strcasecmp (afc.wire_fee.currency,
+ TEH_currency))
+ {
+ /* currency does not match exchange's currency */
+ return TALER_MHD_reply_with_error (connection,
+ MHD_HTTP_PRECONDITION_FAILED,
+ TALER_EC_GENERIC_BAD_CURRENCY,
+ TEH_currency);
+ }
+
+ {
+ struct TALER_MasterWireFeePS wf = {
+ .purpose.purpose = htonl (TALER_SIGNATURE_MASTER_WIRE_FEES),
+ .purpose.size = htonl (wf),
+ .start_date = GNUNET_TIME_absolute_hton (afc.start_date),
+ .end_date = GNUNET_TIME_absolute_hton (afc.end_date),
+ };
+
+ TALER_amount_hton (&kv.wire_fee,
+ &afc.wire_fee);
+ TALER_amount_hton (&kv.closing_fee,
+ &afc.closing_fee);
+ GNUNET_CRYPTO_hash (afc.wire_method,
+ strlen (afc.wire_method) + 1,
+ &wf.h_wire_method);
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_eddsa_verify (
+ TALER_SIGNATURE_MASTER_WIRE_FEES,
+ &wf,
+ &afc.master_sig.eddsa_sig,
+ &TEH_master_public_key.eddsa_pub))
+ {
+ /* signature invalid */
+ GNUNET_break_op (0);
+ *mhd_ret = TALER_MHD_reply_with_error (connection,
+ MHD_HTTP_FORBIDDEN,
+ TALER_EC_EXCHANGE_XXX,
+ NULL);
+ return GNUNET_DB_STATUS_HARD_ERROR;
+ }
+ }
+
+ qs = TEH_DB_run_transaction (connection,
+ "add wire fee",
+ &res,
+ &add_fee,
+ &afc);
+ if (qs < 0)
+ return res;
+ return TALER_MHD_reply_static (
+ connection,
+ MHD_HTTP_NO_CONTENT,
+ NULL,
+ NULL,
+ 0);
+}
+
+
+/* end of taler-exchange-httpd_management_wire_fees.c */
diff --git a/src/include/taler_exchangedb_plugin.h b/src/include/taler_exchangedb_plugin.h
index 159141f8..60ad0e65 100644
--- a/src/include/taler_exchangedb_plugin.h
+++ b/src/include/taler_exchangedb_plugin.h
@@ -3172,12 +3172,41 @@ struct TALER_EXCHANGEDB_Plugin
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
- (*insert_auditor_denom_sig)(void *cls,
- struct TALER_EXCHANGEDB_Session *session,
- const struct GNUNET_HashCode *h_denom_pub,
- const struct TALER_AuditorPublicKeyP *auditor_pub,
- const struct
- TALER_AuditorSignatureP *auditor_sig);
+ (*insert_auditor_denom_sig)(
+ void *cls,
+ struct TALER_EXCHANGEDB_Session *session,
+ const struct GNUNET_HashCode *h_denom_pub,
+ const struct TALER_AuditorPublicKeyP *auditor_pub,
+ const struct TALER_AuditorSignatureP *auditor_sig);
+
+
+ /**
+ * Lookup information about known wire fees.
+ *
+ * @param cls closure
+ * @param session a session
+ * @param wire_method the wire method to lookup fees for
+ * @param start_time starting time of fee
+ * @param end_time end time of fee
+ * @param[out] wire_fee wire fee for that time period; if
+ * different wire fee exists within this time
+ * period, an 'invalid' amount is returned.
+ * @param[out] closing_fee wire fee for that time period; if
+ * different wire fee exists within this time
+ * period, an 'invalid' amount is returned.
+ * @return transaction status code
+ */
+ enum GNUNET_DB_QueryStatus
+ (*lookup_wire_fee_by_time)(
+ void *cls,
+ struct TALER_EXCHANGEDB_Session *session,
+ const char *wire_method,
+ struct GNUNET_TIME_Absolute start_time,
+ struct GNUNET_TIME_Absolute end_time,
+ struct TALER_Amount *wire_fee,
+ struct TALER_Amount *closing_fee);
+
+
};
#endif /* _TALER_EXCHANGE_DB_H */