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/*
This file is part of TALER
Copyright (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 TMH_RESPONSE_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.
*
* @param connection the MHD connection
* @param json the json object
* @param response_code the http response code
* @return MHD result code
*/
int
TMH_RESPONSE_reply_json (struct MHD_Connection *connection,
const 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
TMH_RESPONSE_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
TMH_RESPONSE_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
TMH_RESPONSE_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
TMH_RESPONSE_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
TMH_RESPONSE_reply_internal_error (struct MHD_Connection *connection,
const char *hint);
/**
* Send a response indicating an external error.
*
* @param connection the MHD connection to use
* @param hint hint about the error's nature
* @return a MHD result code
*/
int
TMH_RESPONSE_reply_external_error (struct MHD_Connection *connection,
const char *hint);
/**
* Send a response indicating an error committing a
* transaction (concurrent interference).
*
* @param connection the MHD connection to use
* @return a MHD result code
*/
int
TMH_RESPONSE_reply_commit_error (struct MHD_Connection *connection);
/**
* 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
TMH_RESPONSE_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
TMH_RESPONSE_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
TMH_RESPONSE_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
TMH_RESPONSE_reply_deposit_success (struct MHD_Connection *connection,
const union TALER_CoinSpendPublicKeyP *coin_pub,
const struct GNUNET_HashCode *h_wire,
const struct GNUNET_HashCode *h_contract,
uint64_t transaction_id,
const struct TALER_MerchantPublicKeyP *merchant,
const struct TALER_Amount *amount);
/**
* Send proof that a /deposit request is invalid to client. This
* function will create a message with all of the operations affecting
* the coin that demonstrate that the coin has insufficient value.
*
* @param connection connection to the client
* @param tl transaction list to use to build reply
* @return MHD result code
*/
int
TMH_RESPONSE_reply_deposit_insufficient_funds (struct MHD_Connection *connection,
const struct TALER_MINT_DB_TransactionList *tl);
/**
* Send reserve status information to client.
*
* @param connection connection to the client
* @param rh reserve history to return
* @return MHD result code
*/
int
TMH_RESPONSE_reply_withdraw_status_success (struct MHD_Connection *connection,
const struct ReserveHistory *rh);
/**
* Send reserve status information to client with the
* message that we have insufficient funds for the
* requested /withdraw/sign operation.
*
* @param connection connection to the client
* @param rh reserve history to return
* @return MHD result code
*/
int
TMH_RESPONSE_reply_withdraw_sign_insufficient_funds (struct MHD_Connection *connection,
const struct ReserveHistory *rh);
/**
* Send blinded coin information to client.
*
* @param connection connection to the client
* @param collectable blinded coin to return
* @return MHD result code
*/
int
TMH_RESPONSE_reply_withdraw_sign_success (struct MHD_Connection *connection,
const struct CollectableBlindcoin *collectable);
/**
* Send a confirmation response to a "/refresh/melt" request.
*
* @param connection the connection to send the response to
* @param session_hash hash of the refresh session
* @param noreveal_index which index will the client not have to reveal
* @return a MHD status code
*/
int
TMH_RESPONSE_reply_refresh_melt_success (struct MHD_Connection *connection,
const struct GNUNET_HashCode *session_hash,
uint16_t noreveal_index);
/**
* Send a response for a failed "/refresh/melt" request. The
* transaction history of the given coin demonstrates that the
* @a residual value of the coin is below the @a requested
* contribution of the coin for the melt. Thus, the mint
* refuses the melt operation.
*
* @param connection the connection to send the response to
* @param coin_pub public key of the coin
* @param coin_value original value of the coin
* @param tl transaction history for the coin
* @param requested how much this coin was supposed to contribute
* @param residual remaining value of the coin (after subtracting @a tl)
* @return a MHD result code
*/
int
TMH_RESPONSE_reply_refresh_melt_insufficient_funds (struct MHD_Connection *connection,
const union TALER_CoinSpendPublicKeyP *coin_pub,
struct TALER_Amount coin_value,
struct TALER_MINT_DB_TransactionList *tl,
struct TALER_Amount requested,
struct TALER_Amount residual);
/**
* 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
TMH_RESPONSE_reply_refresh_reveal_success (struct MHD_Connection *connection,
unsigned int num_newcoins,
const struct TALER_DenominationSignature *sigs);
/**
* Send a response for a failed "/refresh/reveal", where the
* revealed value(s) do not match the original commitment.
*
* FIXME: should also include the client's signature over
* the original reveal operation and the data that was signed
* over eventually... (#3712)
*
* @param connection the connection to send the response to
* @param off offset in the array of kappa-commitments where
* the missmatch was detected
* @param j index of the coin for which the missmatch was
* detected
* @param missmatch_object name of the object that was
* bogus (i.e. "transfer key").
* @return a MHD result code
*/
int
TMH_RESPONSE_reply_refresh_reveal_missmatch (struct MHD_Connection *connection,
unsigned int off,
unsigned int j,
const char *missmatch_object);
/**
* Send a response for "/refresh/link".
*
* @param connection the connection to send the response to
* @param transfer_pub transfer public key
* @param shared_secret_enc encrypted shared secret
* @param ldl linked list with link data
* @return a MHD result code
*/
int
TMH_RESPONSE_reply_refresh_link_success (struct MHD_Connection *connection,
const struct TALER_TransferPublicKeyP *transfer_pub,
const struct TALER_EncryptedLinkSecretP *shared_secret_enc,
const struct LinkDataList *ldl);
#endif
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