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/*
This file is part of TALER
Copyright (C) 2015, 2016 GNUnet e.V.
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, If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file include/taler_bank_service.h
* @brief C interface of libtalerbank, a C library to use the Taler bank's HTTP API
* This is currently ONLY used to provide the "test" wire transfer protocol.
* @author Christian Grothoff
*/
#ifndef _TALER_BANK_SERVICE_H
#define _TALER_BANK_SERVICE_H
#include <jansson.h>
#include "taler_util.h"
/* ********************* event loop *********************** */
/**
* @brief Handle to this library context. This is where the
* main event loop logic lives.
*/
struct TALER_BANK_Context;
/**
* Initialise a context. A context should be used for each thread and should
* not be shared among multiple threads.
*
* @param url HTTP base URL for the bank
* @return the context, NULL on error (failure to initialize)
*/
struct TALER_BANK_Context *
TALER_BANK_init (const char *url);
/**
* Obtain the information for a select() call to wait until
* #TALER_BANK_perform() is ready again. Note that calling
* any other TALER_BANK-API may also imply that the library
* is again ready for #TALER_BANK_perform().
*
* Basically, a client should use this API to prepare for select(),
* then block on select(), then call #TALER_BANK_perform() and then
* start again until the work with the context is done.
*
* This function will NOT zero out the sets and assumes that @a max_fd
* and @a timeout are already set to minimal applicable values. It is
* safe to give this API FD-sets and @a max_fd and @a timeout that are
* already initialized to some other descriptors that need to go into
* the select() call.
*
* @param ctx context to get the event loop information for
* @param read_fd_set will be set for any pending read operations
* @param write_fd_set will be set for any pending write operations
* @param except_fd_set is here because curl_multi_fdset() has this argument
* @param max_fd set to the highest FD included in any set;
* if the existing sets have no FDs in it, the initial
* value should be "-1". (Note that `max_fd + 1` will need
* to be passed to select().)
* @param timeout set to the timeout in milliseconds (!); -1 means
* no timeout (NULL, blocking forever is OK), 0 means to
* proceed immediately with #TALER_BANK_perform().
*/
void
TALER_BANK_get_select_info (struct TALER_BANK_Context *ctx,
fd_set *read_fd_set,
fd_set *write_fd_set,
fd_set *except_fd_set,
int *max_fd,
long *timeout);
/**
* Run the main event loop for the Taler interaction.
*
* @param ctx the library context
*/
void
TALER_BANK_perform (struct TALER_BANK_Context *ctx);
/**
* Cleanup library initialisation resources. This function should be called
* after using this library to cleanup the resources occupied during library's
* initialisation.
*
* @param ctx the library context
*/
void
TALER_BANK_fini (struct TALER_BANK_Context *ctx);
/* ********************* /admin/add/incoming *********************** */
/**
* @brief A /admin/add/incoming Handle
*/
struct TALER_BANK_AdminAddIncomingHandle;
/**
* Callbacks of this type are used to serve the result of submitting
* information about an incoming transaction to a bank.
*
* @param cls closure
* @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
* 0 if the bank's reply is bogus (fails to follow the protocol)
* @param json detailed response from the HTTPD, or NULL if reply was not in JSON
*/
typedef void
(*TALER_BANK_AdminAddIncomingResultCallback) (void *cls,
unsigned int http_status,
json_t *json);
/**
* Notify the bank that we have received an incoming transaction
* which fills a reserve. Note that this API is an administrative
* API and thus not accessible to typical bank clients, but only
* to the operators of the bank.
*
* @param bank the bank handle; the bank must be ready to operate
* @param reserve_pub public key of the reserve
* @param amount amount that was deposited
* @param execution_date when did we receive the amount
* @param debit_account_no account number to withdraw from (53 bits at most)
* @param credit_account_no account number to deposit into (53 bits at most)
* @param res_cb the callback to call when the final result for this request is available
* @param res_cb_cls closure for the above callback
* @return NULL
* if the inputs are invalid (i.e. invalid amount).
* In this case, the callback is not called.
*/
struct TALER_BANK_AdminAddIncomingHandle *
TALER_BANK_admin_add_incoming (struct TALER_BANK_Context *bank,
const struct TALER_WireTransferIdentifierRawP *wtid,
const struct TALER_Amount *amount,
uint64_t debit_account_no,
uint64_t credit_account_no,
TALER_BANK_AdminAddIncomingResultCallback res_cb,
void *res_cb_cls);
/**
* Cancel an add incoming. This function cannot be used on a request
* handle if a response is already served for it.
*
* @param aai the admin add incoming request handle
*/
void
TALER_BANK_admin_add_incoming_cancel (struct TALER_BANK_AdminAddIncomingHandle *aai);
#endif /* _TALER_BANK_SERVICE_H */
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