/*
This file is part of TALER
Copyright (C) 2014, 2015 Christian Grothoff (and other contributing authors)
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
*/
/**
* @file include/taler_mint_service.h
* @brief C interface of libtalermint, a C library to use mint's HTTP API
* @author Sree Harsha Totakura
* @author Christian Grothoff
*/
#ifndef _TALER_MINT_SERVICE_H
#define _TALER_MINT_SERVICE_H
#include "taler_util.h"
/* ********************* event loop *********************** */
/**
* @brief Handle to this library context. This is where the
* main event loop logic lives.
*/
struct TALER_MINT_Context;
/**
* Initialise a context. A context should be used for each thread and should
* not be shared among multiple threads.
*
* @return the context, NULL on error (failure to initialize)
*/
struct TALER_MINT_Context *
TALER_MINT_init (void);
/**
* Obtain the information for a select() call to wait until
* #TALER_MINT_perform() is ready again. Note that calling
* any other TALER_MINT-API may also imply that the library
* is again ready for #TALER_MINT_perform().
*
* Basically, a client should use this API to prepare for select(),
* then block on select(), then call #TALER_MINT_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_MINT_perform().
*/
void
TALER_MINT_get_select_info (struct TALER_MINT_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_MINT_perform (struct TALER_MINT_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_MINT_fini (struct TALER_MINT_Context *ctx);
/* ********************* /keys *********************** */
/**
* List of possible options to be passed to
* #TALER_MINT_connect().
*/
enum TALER_MINT_Option
{
/**
* Terminator (end of option list).
*/
TALER_MINT_OPTION_END = 0
};
/**
* @brief Mint's signature key
*/
struct TALER_MINT_SigningPublicKey
{
/**
* The signing public key
*/
struct TALER_MintPublicKeyP key;
/**
* Validity start time
*/
struct GNUNET_TIME_Absolute valid_from;
/**
* Validity expiration time
*/
struct GNUNET_TIME_Absolute valid_until;
};
/**
* @brief Public information about a mint's denomination key
*/
struct TALER_MINT_DenomPublicKey
{
/**
* The public key
*/
struct TALER_DenominationPublicKey key;
/**
* Timestamp indicating when the denomination key becomes valid
*/
struct GNUNET_TIME_Absolute valid_from;
/**
* Timestamp indicating when the denomination key can’t be used anymore to
* withdraw new coins.
*/
struct GNUNET_TIME_Absolute withdraw_valid_until;
/**
* Timestamp indicating when coins of this denomination become invalid.
*/
struct GNUNET_TIME_Absolute deposit_valid_until;
/**
* The value of this denomination
*/
struct TALER_Amount value;
/**
* The applicable fee for withdrawing a coin of this denomination
*/
struct TALER_Amount fee_withdraw;
/**
* The applicable fee to spend a coin of this denomination
*/
struct TALER_Amount fee_deposit;
/**
*The applicable fee to melt/refresh a coin of this denomination
*/
struct TALER_Amount fee_refresh;
};
/**
* @brief Information we get from the mint about auditors.
*/
struct TALER_MINT_AuditorInformation
{
/**
* Public key of the auditing institution.
*/
struct TALER_AuditorPublicKeyP auditor_pub;
/**
* URL of the auditing institution. The application must check that
* this is an acceptable auditor for its purpose and also verify
* that the @a auditor_pub matches the auditor's public key given at
* that website. We expect that in practice software is going to
* often ship with an initial list of accepted auditors, just like
* browsers ship with a CA root store.
*/
const char *auditor_url;
/**
* Number of denomination keys audited by this auditor.
*/
unsigned int num_denom_keys;
/**
* Array of length @a denom_keys with the denomination
* keys audited by this auditor. Note that the array
* elements point to the same locations as the entries
* in the key's main `denom_keys` array.
*/
struct TALER_MINT_DenomPublicKey *const*denom_keys;
};
/**
* @brief Information about keys from the mint.
*/
struct TALER_MINT_Keys
{
/**
* Long-term offline signing key of the mint.
*/
struct TALER_MasterPublicKeyP master_pub;
/**
* Array of the mint's online signing keys.
*/
struct TALER_MINT_SigningPublicKey *sign_keys;
/**
* Array of the mint's denomination keys.
*/
struct TALER_MINT_DenomPublicKey *denom_keys;
/**
* Array of the keys of the auditors of the mint.
*/
struct TALER_AuditorPublicKeyP *auditors;
/**
* Length of the @e sign_keys array.
*/
unsigned int num_sign_keys;
/**
* Length of the @e denom_keys array.
*/
unsigned int num_denom_keys;
/**
* Length of the @e auditors array.
*/
unsigned int num_auditors;
};
/**
* Function called with information about who is auditing
* a particular mint and what key the mint is using.
*
* @param cls closure
* @param keys information about the various keys used
* by the mint
*/
typedef void
(*TALER_MINT_CertificationCallback) (void *cls,
const struct TALER_MINT_Keys *keys);
/**
* @brief Handle to the mint. This is where we interact with
* a particular mint and keep the per-mint information.
*/
struct TALER_MINT_Handle;
/**
* Initialise a connection to the mint. Will connect to the
* mint and obtain information about the mint's master public
* key and the mint's auditor. The respective information will
* be passed to the @a cert_cb once available, and all future
* interactions with the mint will be checked to be signed
* (where appropriate) by the respective master key.
*
* @param ctx the context
* @param url HTTP base URL for the mint
* @param cert_cb function to call with the mint's certification information
* @param cert_cb_cls closure for @a cert_cb
* @param ... list of additional arguments, terminated by #TALER_MINT_OPTION_END.
* @return the mint handle; NULL upon error
*/
struct TALER_MINT_Handle *
TALER_MINT_connect (struct TALER_MINT_Context *ctx,
const char *url,
TALER_MINT_CertificationCallback cert_cb,
void *cert_cb_cls,
...);
/**
* Disconnect from the mint.
*
* @param mint the mint handle
*/
void
TALER_MINT_disconnect (struct TALER_MINT_Handle *mint);
/**
* Obtain the keys from the mint.
*
* @param mint the mint handle
* @return the mint's key set
*/
const struct TALER_MINT_Keys *
TALER_MINT_get_keys (const struct TALER_MINT_Handle *mint);
/**
* Test if the given @a pub is a the current signing key from the mint
* according to @a keys.
*
* @param keys the mint's key set
* @param pub claimed current online signing key for the mint
* @return #GNUNET_OK if @a pub is (according to /keys) a current signing key
*/
int
TALER_MINT_test_signing_key (const struct TALER_MINT_Keys *keys,
const struct TALER_MintPublicKeyP *pub);
/**
* Obtain the denomination key details from the mint.
*
* @param keys the mint's key set
* @param pk public key of the denomination to lookup
* @return details about the given denomination key
*/
const struct TALER_MINT_DenomPublicKey *
TALER_MINT_get_denomination_key (const struct TALER_MINT_Keys *keys,
const struct TALER_DenominationPublicKey *pk);
/* ********************* /wire *********************** */
/**
* @brief A Wire format inquiry handle
*/
struct TALER_MINT_WireHandle;
/**
* Callbacks of this type are used to serve the result of submitting a
* wire format inquiry request to a mint.
*
* The callback is invoked multiple times, once for each supported @a
* method. Finally, it is invoked one more time with cls/0/NULL/NULL
* to indicate the end of the iteration. If any request fails to
* generate a valid response from the mint, @a http_status will also
* be zero and the iteration will also end. Thus, the iteration
* always ends with a final call with an @a http_status of 0. If the
* @a http_status is already 0 on the first call, then the response to
* the /wire request was invalid. Later, clients can tell the
* difference between @a http_status of 0 indicating a failed
* /wire/method request and a regular end of the iteration by @a
* method being non-NULL. If the mint simply correctly asserts that
* it does not support any methods, @a method will be NULL but the @a
* http_status will be #MHD_HTTP_OK for the first call (followed by a
* cls/0/NULL/NULL call to signal the end of the iteration).
*
* @param cls closure
* @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful request;
* 0 if the mint's reply is bogus (fails to follow the protocol)
* @param method wire format method supported, i.e. "test" or "sepa", or NULL
* if already the /wire request failed.
* @param obj the received JSON reply, if successful this should be the wire
* format details as provided by /wire/METHOD/, or NULL if the
* reply was not in JSON format (in this case, the client might
* want to do an HTTP request to /wire/METHOD/ with a browser to
* provide more information to the user about the @a method).
*/
typedef void
(*TALER_MINT_WireResultCallback) (void *cls,
unsigned int http_status,
const char *method,
json_t *obj);
/**
* Obtain information about a mint's wire instructions.
* A mint may provide wire instructions for creating
* a reserve. The wire instructions also indicate
* which wire formats merchants may use with the mint.
* This API is typically used by a wallet for wiring
* funds, and possibly by a merchant to determine
* supported wire formats.
*
* Note that while we return the (main) response verbatim to the
* caller for further processing, we do already verify that the
* response is well-formed (i.e. that signatures included in the
* response are all valid). If the mint's reply is not well-formed,
* we return an HTTP status code of zero to @a cb.
*
* @param mint the mint handle; the mint must be ready to operate
* @param wire_cb the callback to call when a reply for this request is available
* @param wire_cb_cls closure for the above callback
* @return a handle for this request
*/
struct TALER_MINT_WireHandle *
TALER_MINT_wire (struct TALER_MINT_Handle *mint,
TALER_MINT_WireResultCallback wire_cb,
void *wire_cb_cls);
/**
* Cancel a wire information request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param wh the wire information request handle
*/
void
TALER_MINT_wire_cancel (struct TALER_MINT_WireHandle *wh);
/* ********************* /deposit *********************** */
/**
* @brief A Deposit Handle
*/
struct TALER_MINT_DepositHandle;
/**
* Callbacks of this type are used to serve the result of submitting a
* deposit permission request to a mint.
*
* @param cls closure
* @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful deposit;
* 0 if the mint's reply is bogus (fails to follow the protocol)
* @param obj the received JSON reply, should be kept as proof (and, in case of errors,
* be forwarded to the customer)
*/
typedef void
(*TALER_MINT_DepositResultCallback) (void *cls,
unsigned int http_status,
json_t *obj);
/**
* Submit a deposit permission to the mint and get the mint's
* response. This API is typically used by a merchant. Note that
* while we return the response verbatim to the caller for further
* processing, we do already verify that the response is well-formed
* (i.e. that signatures included in the response are all valid). If
* the mint's reply is not well-formed, we return an HTTP status code
* of zero to @a cb.
*
* We also verify that the @a coin_sig is valid for this deposit
* request, and that the @a ub_sig is a valid signature for @a
* coin_pub. Also, the @a mint must be ready to operate (i.e. have
* finished processing the /keys reply). If either check fails, we do
* NOT initiate the transaction with the mint and instead return NULL.
*
* @param mint the mint handle; the mint must be ready to operate
* @param amount the amount to be deposited
* @param wire_details the merchant’s account details, in a format supported by the mint
* @param h_contract hash of the contact of the merchant with the customer (further details are never disclosed to the mint)
* @param coin_pub coin’s public key
* @param denom_pub denomination key with which the coin is signed
* @param denom_sig mint’s unblinded signature of the coin
* @param timestamp timestamp when the contract was finalized, must match approximately the current time of the mint
* @param transaction_id transaction id for the transaction between merchant and customer
* @param merchant_pub the public key of the merchant (used to identify the merchant for refund requests)
* @param refund_deadline date until which the merchant can issue a refund to the customer via the mint (can be zero if refunds are not allowed)
* @param coin_sig the signature made with purpose #TALER_SIGNATURE_WALLET_COIN_DEPOSIT made by the customer with the coin’s private key.
* @param cb the callback to call when a reply for this request is available
* @param cb_cls closure for the above callback
* @return a handle for this request; NULL if the inputs are invalid (i.e.
* signatures fail to verify). In this case, the callback is not called.
*/
struct TALER_MINT_DepositHandle *
TALER_MINT_deposit (struct TALER_MINT_Handle *mint,
const struct TALER_Amount *amount,
json_t *wire_details,
const struct GNUNET_HashCode *h_contract,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_DenominationSignature *denom_sig,
const struct TALER_DenominationPublicKey *denom_pub,
struct GNUNET_TIME_Absolute timestamp,
uint64_t transaction_id,
const struct TALER_MerchantPublicKeyP *merchant_pub,
struct GNUNET_TIME_Absolute refund_deadline,
const struct TALER_CoinSpendSignatureP *coin_sig,
TALER_MINT_DepositResultCallback cb,
void *cb_cls);
/**
* Cancel a deposit permission request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param deposit the deposit permission request handle
*/
void
TALER_MINT_deposit_cancel (struct TALER_MINT_DepositHandle *deposit);
/* ********************* /withdraw/status *********************** */
/**
* @brief A /withdraw/status Handle
*/
struct TALER_MINT_WithdrawStatusHandle;
/**
* Ways how a reserve's balance may change.
*/
enum TALER_MINT_ReserveTransactionType {
/**
* Deposit into the reserve.
*/
TALER_MINT_RTT_DEPOSIT,
/**
* Withdrawal from the reserve.
*/
TALER_MINT_RTT_WITHDRAWAL
};
/**
* @brief Entry in the reserve's transaction history.
*/
struct TALER_MINT_ReserveHistory
{
/**
* Type of the transaction.
*/
enum TALER_MINT_ReserveTransactionType type;
/**
* Amount transferred (in or out).
*/
struct TALER_Amount amount;
/**
* Details depending on @e type.
*/
union {
/**
* Transaction details for the incoming transaction.
*/
json_t *wire_in_details;
/**
* Signature authorizing the withdrawal for outgoing transaction.
*/
json_t *out_authorization_sig;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* deposit permission request to a mint.
*
* @param cls closure
* @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
* 0 if the mint's reply is bogus (fails to follow the protocol)
* @param[in] json original response in JSON format (useful only for diagnostics)
* @param balance current balance in the reserve, NULL on error
* @param history_length number of entries in the transaction history, 0 on error
* @param history detailed transaction history, NULL on error
*/
typedef void
(*TALER_MINT_WithdrawStatusResultCallback) (void *cls,
unsigned int http_status,
json_t *json,
const struct TALER_Amount *balance,
unsigned int history_length,
const struct TALER_MINT_ReserveHistory *history);
/**
* Submit a request to obtain the transaction history of a reserve
* from the mint. Note that while we return the full response to the
* caller for further processing, we do already verify that the
* response is well-formed (i.e. that signatures included in the
* response are all valid and add up to the balance). If the mint's
* reply is not well-formed, we return an HTTP status code of zero to
* @a cb.
*
* @param mint the mint handle; the mint must be ready to operate
* @param reserve_pub public key of the reserve to inspect
* @param cb the callback to call when a reply for this request is available
* @param cb_cls closure for the above callback
* @return a handle for this request; NULL if the inputs are invalid (i.e.
* signatures fail to verify). In this case, the callback is not called.
*/
struct TALER_MINT_WithdrawStatusHandle *
TALER_MINT_withdraw_status (struct TALER_MINT_Handle *mint,
const struct TALER_ReservePublicKeyP *reserve_pub,
TALER_MINT_WithdrawStatusResultCallback cb,
void *cb_cls);
/**
* Cancel a withdraw status request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param wsh the withdraw status request handle
*/
void
TALER_MINT_withdraw_status_cancel (struct TALER_MINT_WithdrawStatusHandle *wsh);
/* ********************* /withdraw/sign *********************** */
/**
* @brief A /withdraw/sign Handle
*/
struct TALER_MINT_WithdrawSignHandle;
/**
* Callbacks of this type are used to serve the result of submitting a
* deposit permission request to a mint.
*
* @param cls closure
* @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
* 0 if the mint's reply is bogus (fails to follow the protocol)
* @param sig signature over the coin, NULL on error
* @param full_response full response from the mint (for logging, in case of errors)
*/
typedef void
(*TALER_MINT_WithdrawSignResultCallback) (void *cls,
unsigned int http_status,
const struct TALER_DenominationSignature *sig,
json_t *full_response);
/**
* Withdraw a coin from the mint using a /withdraw/sign request. This
* API is typically used by a wallet. Note that to ensure that no
* money is lost in case of hardware failures, the caller must have
* committed (most of) the arguments to disk before calling, and be
* ready to repeat the request with the same arguments in case of
* failures.
*
* @param mint the mint handle; the mint must be ready to operate
* @param pk kind of coin to create
* @param reserve_priv private key of the reserve to withdraw from
* @param coin_priv where to store the coin's private key,
* caller must have committed this value to disk before the call (with @a pk)
* @param blinding_key where to store the coin's blinding key
* caller must have committed this value to disk before the call (with @a pk)
* @param res_cb the callback to call when the final result for this request is available
* @param res_cb_cls closure for @a res_cb
* @return NULL
* if the inputs are invalid (i.e. denomination key not with this mint).
* In this case, the callback is not called.
*/
struct TALER_MINT_WithdrawSignHandle *
TALER_MINT_withdraw_sign (struct TALER_MINT_Handle *mint,
const struct TALER_MINT_DenomPublicKey *pk,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const struct TALER_CoinSpendPrivateKeyP *coin_priv,
const struct TALER_DenominationBlindingKey *blinding_key,
TALER_MINT_WithdrawSignResultCallback res_cb,
void *res_cb_cls);
/**
* Cancel a withdraw status request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param sign the withdraw sign request handle
*/
void
TALER_MINT_withdraw_sign_cancel (struct TALER_MINT_WithdrawSignHandle *sign);
/* ********************* /refresh/melt+reveal ***************************** */
/**
* Melt (partially spent) coins to obtain fresh coins that are
* unlinkable to the original coin(s). Note that melting more
* than one coin in a single request will make those coins linkable,
* so the safest operation only melts one coin at a time.
*
* This API is typically used by a wallet. Note that to ensure that
* no money is lost in case of hardware failures, is operation does
* not actually initiate the request. Instead, it generates a buffer
* which the caller must store before proceeding with the actual call
* to #TALER_MINT_refresh_melt() that will generate the request.
*
* This function does verify that the given request data is internally
* consistent. However, the @a melts_sigs are only verified if @a
* check_sigs is set to #GNUNET_YES, as this may be relatively
* expensive and should be redundant.
*
* Aside from some non-trivial cryptographic operations that might
* take a bit of CPU time to complete, this function returns
* its result immediately and does not start any asynchronous
* processing. This function is also thread-safe.
*
* @param num_melts number of coins that are being melted (typically 1)
* @param melt_privs array of @a num_melts private keys of the coins to melt
* @param melt_amounts array of @a num_melts amounts specifying how much
* each coin will contribute to the melt (including fee)
* @param melt_sigs array of @a num_melts signatures affirming the
* validity of the public keys corresponding to the
* @a melt_privs private keys
* @param melt_pks array of @a num_melts denomination key information
* records corresponding to the @a melt_sigs
* validity of the keys
* @param check_sigs verify the validity of the signatures of @a melt_sigs
* @param fresh_pks_len length of the @a pks array
* @param fresh_pks array of @a pks_len denominations of fresh coins to create
* @param[out] res_size set to the size of the return value, or 0 on error
* @return NULL
* if the inputs are invalid (i.e. denomination key not with this mint).
* Otherwise, pointer to a buffer of @a res_size to store persistently
* before proceeding to #TALER_MINT_refresh_melt().
* Non-null results should be freed using #GNUNET_free().
*/
char *
TALER_MINT_refresh_prepare (unsigned int num_melts,
const struct TALER_CoinSpendPrivateKeyP *melt_privs,
const struct TALER_Amount *melt_amounts,
const struct TALER_DenominationSignature *melt_sigs,
const struct TALER_MINT_DenomPublicKey *melt_pks,
int check_sigs,
unsigned int fresh_pks_len,
const struct TALER_MINT_DenomPublicKey *fresh_pks,
size_t *res_size);
/* ********************* /refresh/melt ***************************** */
/**
* @brief A /refresh/melt Handle
*/
struct TALER_MINT_RefreshMeltHandle;
/**
* Callbacks of this type are used to notify the application about the
* result of the /refresh/melt stage. If successful, the @a noreveal_index
* should be committed to disk prior to proceeding #TALER_MINT_refresh_reveal().
*
* @param cls closure
* @param http_status HTTP response code, never #MHD_HTTP_OK (200) as for successful intermediate response this callback is skipped.
* 0 if the mint's reply is bogus (fails to follow the protocol)
* @param noreveal_index choice by the mint in the cut-and-choose protocol,
* UINT16_MAX on error
* @param full_response full response from the mint (for logging, in case of errors)
*/
typedef void
(*TALER_MINT_RefreshMeltCallback) (void *cls,
unsigned int http_status,
uint16_t noreveal_index,
json_t *full_response);
/**
* Submit a melt request to the mint and get the mint's
* response.
*
* This API is typically used by a wallet. Note that to ensure that
* no money is lost in case of hardware failures, the provided
* argument should have been constructed using
* #TALER_MINT_refresh_prepare and committed to persistent storage
* prior to calling this function.
*
* @param mint the mint handle; the mint must be ready to operate
* @param refresh_data_length size of the @a refresh_data (returned
* in the `res_size` argument from #TALER_MINT_refresh_prepare())
* @param refresh_data the refresh data as returned from
#TALER_MINT_refresh_prepare())
* @param melt_cb the callback to call with the result
* @param melt_cb_cls closure for @a melt_cb
* @return a handle for this request; NULL if the argument was invalid.
* In this case, neither callback will be called.
*/
struct TALER_MINT_RefreshMeltHandle *
TALER_MINT_refresh_melt (struct TALER_MINT_Handle *mint,
size_t refresh_data_length,
const char *refresh_data,
TALER_MINT_RefreshMeltCallback melt_cb,
void *melt_cb_cls);
/**
* Cancel a refresh melt request. This function cannot be used
* on a request handle if the callback was already invoked.
*
* @param rmh the refresh handle
*/
void
TALER_MINT_refresh_melt_cancel (struct TALER_MINT_RefreshMeltHandle *rmh);
/* ********************* /refresh/reveal ***************************** */
/**
* Callbacks of this type are used to return the final result of
* submitting a refresh request to a mint. If the operation was
* successful, this function returns the signatures over the coins
* that were remelted. The @a coin_privs and @a sigs arrays give the
* coins in the same order (and should have the same length) in which
* the original request specified the respective denomination keys.
*
* @param cls closure
* @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
* 0 if the mint's reply is bogus (fails to follow the protocol)
* @param num_coins number of fresh coins created, length of the @a sigs and @a coin_privs arrays, 0 if the operation failed
* @param coin_privs array of @a num_coins private keys for the coins that were created, NULL on error
* @param sigs array of signature over @a num_coins coins, NULL on error
* @param full_response full response from the mint (for logging, in case of errors)
*/
typedef void
(*TALER_MINT_RefreshRevealCallback) (void *cls,
unsigned int http_status,
unsigned int num_coins,
const struct TALER_CoinSpendPrivateKeyP *coin_privs,
const struct TALER_DenominationSignature *sigs,
json_t *full_response);
/**
* @brief A /refresh/reveal Handle
*/
struct TALER_MINT_RefreshRevealHandle;
/**
* Submit a /refresh/reval request to the mint and get the mint's
* response.
*
* This API is typically used by a wallet. Note that to ensure that
* no money is lost in case of hardware failures, the provided
* arguments should have been committed to persistent storage
* prior to calling this function.
*
* @param mint the mint handle; the mint must be ready to operate
* @param refresh_data_length size of the @a refresh_data (returned
* in the `res_size` argument from #TALER_MINT_refresh_prepare())
* @param refresh_data the refresh data as returned from
#TALER_MINT_refresh_prepare())
* @param noreveal_index response from the mint to the
* #TALER_MINT_refresh_melt() invocation
* @param reveal_cb the callback to call with the final result of the
* refresh operation
* @param reveal_cb_cls closure for the above callback
* @return a handle for this request; NULL if the argument was invalid.
* In this case, neither callback will be called.
*/
struct TALER_MINT_RefreshRevealHandle *
TALER_MINT_refresh_reveal (struct TALER_MINT_Handle *mint,
size_t refresh_data_length,
const char *refresh_data,
uint16_t noreveal_index,
TALER_MINT_RefreshRevealCallback reveal_cb,
void *reveal_cb_cls);
/**
* Cancel a refresh reveal request. This function cannot be used
* on a request handle if the callback was already invoked.
*
* @param rrh the refresh reval handle
*/
void
TALER_MINT_refresh_reveal_cancel (struct TALER_MINT_RefreshRevealHandle *rrh);
/* ********************* /refresh/link ***************************** */
/**
* @brief A /refresh/link Handle
*/
struct TALER_MINT_RefreshLinkHandle;
/**
* Callbacks of this type are used to return the final result of
* submitting a /refresh/link request to a mint. If the operation was
* successful, this function returns the signatures over the coins
* that were created when the original coin was melted.
*
* @param cls closure
* @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
* 0 if the mint's reply is bogus (fails to follow the protocol)
* @param num_coins number of fresh coins created, length of the @a sigs and @a coin_privs arrays, 0 if the operation failed
* @param coin_privs array of @a num_coins private keys for the coins that were created, NULL on error
* @param sigs array of signature over @a num_coins coins, NULL on error
* @param pubs array of public keys for the @a sigs, NULL on error
* @param full_response full response from the mint (for logging, in case of errors)
*/
typedef void
(*TALER_MINT_RefreshLinkCallback) (void *cls,
unsigned int http_status,
unsigned int num_coins,
const struct TALER_CoinSpendPrivateKeyP *coin_privs,
const struct TALER_DenominationSignature *sigs,
const struct TALER_DenominationPublicKey *pubs,
json_t *full_response);
/**
* Submit a link request to the mint and get the mint's response.
*
* This API is typically not used by anyone, it is more a threat
* against those trying to receive a funds transfer by abusing the
* /refresh protocol.
*
* @param mint the mint handle; the mint must be ready to operate
* @param coin_priv private key to request link data for
* @param link_cb the callback to call with the useful result of the
* refresh operation the @a coin_priv was involved in (if any)
* @param link_cb_cls closure for @a link_cb
* @return a handle for this request
*/
struct TALER_MINT_RefreshLinkHandle *
TALER_MINT_refresh_link (struct TALER_MINT_Handle *mint,
const struct TALER_CoinSpendPrivateKeyP *coin_priv,
TALER_MINT_RefreshLinkCallback link_cb,
void *link_cb_cls);
/**
* Cancel a refresh link request. This function cannot be used
* on a request handle if the callback was already invoked.
*
* @param rlh the refresh link handle
*/
void
TALER_MINT_refresh_link_cancel (struct TALER_MINT_RefreshLinkHandle *rlh);
/* ********************* /admin/add/incoming *********************** */
/**
* @brief A /admin/add/incoming Handle
*/
struct TALER_MINT_AdminAddIncomingHandle;
/**
* Callbacks of this type are used to serve the result of submitting
* information about an incoming transaction to a mint.
*
* @param cls closure
* @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
* 0 if the mint's reply is bogus (fails to follow the protocol)
* @param full_response full response from the mint (for logging, in case of errors)
*/
typedef void
(*TALER_MINT_AdminAddIncomingResultCallback) (void *cls,
unsigned int http_status,
json_t *full_response);
/**
* Notify the mint 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 mint clients, but only
* to the operators of the mint.
*
* @param mint the mint handle; the mint 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 wire wire details
* @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_MINT_AdminAddIncomingHandle *
TALER_MINT_admin_add_incoming (struct TALER_MINT_Handle *mint,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_Amount *amount,
struct GNUNET_TIME_Absolute execution_date,
const json_t *wire,
TALER_MINT_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_MINT_admin_add_incoming_cancel (struct TALER_MINT_AdminAddIncomingHandle *aai);
#endif /* _TALER_MINT_SERVICE_H */