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/*
This file is part of TALER
(C) 2014 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 taler-mint-httpd_responses.h
* @brief API for generating the various replies of the mint; these
* functions are called TALER_MINT_reply_ and they generate
* and queue MHD response objects for a given connection.
* @author Florian Dold
* @author Benedikt Mueller
* @author Christian Grothoff
*/
#ifndef TALER_MINT_HTTPD_RESPONSES_H
#define TALER_MINT_HTTPD_RESPONSES_H
#include <gnunet/gnunet_util_lib.h>
#include <jansson.h>
#include <microhttpd.h>
#include <pthread.h>
#include "taler-mint-httpd.h"
#include "taler-mint-httpd_db.h"
/**
* Send JSON object as response. Decreases the reference count of the
* JSON object.
*
* @param connection the MHD connection
* @param json the json object
* @param response_code the http response code
* @return MHD result code
*/
int
TALER_MINT_reply_json (struct MHD_Connection *connection,
json_t *json,
unsigned int response_code);
/**
* Function to call to handle the request by building a JSON
* reply from a format string and varargs.
*
* @param connection the MHD connection to handle
* @param response_code HTTP response code to use
* @param fmt format string for pack
* @param ... varargs
* @return MHD result code
*/
int
TALER_MINT_reply_json_pack (struct MHD_Connection *connection,
unsigned int response_code,
const char *fmt,
...);
/**
* Send a response indicating an invalid argument.
*
* @param connection the MHD connection to use
* @param param_name the parameter that is invalid
* @return MHD result code
*/
int
TALER_MINT_reply_arg_invalid (struct MHD_Connection *connection,
const char *param_name);
/**
* Send a response indicating an invalid coin. (I.e. the signature
* over the public key of the coin does not match a valid signing key
* of this mint).
*
* @param connection the MHD connection to use
* @return MHD result code
*/
int
TALER_MINT_reply_coin_invalid (struct MHD_Connection *connection);
/**
* Send a response indicating a missing argument.
*
* @param connection the MHD connection to use
* @param param_name the parameter that is missing
* @return a MHD result code
*/
int
TALER_MINT_reply_arg_missing (struct MHD_Connection *connection,
const char *param_name);
/**
* Send a response indicating an internal error.
*
* @param connection the MHD connection to use
* @param hint hint about the internal error's nature
* @return a MHD result code
*/
int
TALER_MINT_reply_internal_error (struct MHD_Connection *connection,
const char *hint);
/**
* Send a response indicating a failure to talk to the Mint's
* database.
*
* @param connection the MHD connection to use
* @return a MHD result code
*/
int
TALER_MINT_reply_internal_db_error (struct MHD_Connection *connection);
/**
* Send a response indicating that the request was too big.
*
* @param connection the MHD connection to use
* @return a MHD result code
*/
int
TALER_MINT_reply_request_too_large (struct MHD_Connection *connection);
/**
* Send a response indicating that the JSON was malformed.
*
* @param connection the MHD connection to use
* @return a MHD result code
*/
int
TALER_MINT_reply_invalid_json (struct MHD_Connection *connection);
/**
* Send confirmation of deposit success to client. This function
* will create a signed message affirming the given information
* and return it to the client. By this, the mint affirms that
* the coin had sufficient (residual) value for the specified
* transaction and that it will execute the requested deposit
* operation with the given wiring details.
*
* @param connection connection to the client
* @param coin_pub public key of the coin
* @param h_wire hash of wire details
* @param h_contract hash of contract details
* @param transaction_id transaction ID
* @param merchant merchant public key
* @param amount fraction of coin value to deposit
* @return MHD result code
*/
int
TALER_MINT_reply_deposit_success (struct MHD_Connection *connection,
const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
const struct GNUNET_HashCode *h_wire,
const struct GNUNET_HashCode *h_contract,
uint64_t transaction_id,
const struct GNUNET_CRYPTO_EddsaPublicKey *merchant,
const struct TALER_Amount *amount);
/**
* Send reserve status information to client.
*
* @param connection connection to the client
* @param balance current reserve balance
* @param expiration when will the reserve expire
* @return MHD result code
*/
int
TALER_MINT_reply_withdraw_status_success (struct MHD_Connection *connection,
struct TALER_Amount balance,
struct GNUNET_TIME_Absolute expiration);
/**
* Send blinded coin information to client.
*
* @param connection connection to the client
* @param collectable blinded coin to return
* @return MHD result code
*/
int
TALER_MINT_reply_withdraw_sign_success (struct MHD_Connection *connection,
const struct CollectableBlindcoin *collectable);
/**
* Send a response to a "/refresh/commit" request.
*
* FIXME: maybe not the ideal argument type for @a refresh_session here.
*
* @param connection the connection to send the response to
* @param refresh_session the refresh session
* @return a MHD status code
*/
int
TALER_MINT_reply_refresh_commit_success (struct MHD_Connection *connection,
struct RefreshSession *refresh_session);
/**
* Send a response for "/refresh/melt".
*
* @param connection the connection to send the response to
* @param session session data to generate reply from
* @param session_pub the refresh session public key.
* @return a MHD result code
*/
int
TALER_MINT_reply_refresh_melt_success (struct MHD_Connection *connection,
const struct RefreshSession *session,
const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub);
/**
* Send a response for "/refresh/reveal".
*
* @param connection the connection to send the response to
* @param num_newcoins number of new coins for which we reveal data
* @param sigs array of @a num_newcoins signatures revealed
* @return a MHD result code
*/
int
TALER_MINT_reply_refresh_reveal_success (struct MHD_Connection *connection,
unsigned int num_newcoins,
struct GNUNET_CRYPTO_rsa_Signature **sigs);
#endif
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