/*
This file is part of TALER
Copyright (C) 2014-2022 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
*/
/**
* @file include/taler_exchange_service.h
* @brief C interface of libtalerexchange, a C library to use exchange's HTTP API
* @author Sree Harsha Totakura
* @author Christian Grothoff
*/
#ifndef _TALER_EXCHANGE_SERVICE_H
#define _TALER_EXCHANGE_SERVICE_H
#include
#include "taler_util.h"
#include "taler_error_codes.h"
#include "taler_kyclogic_lib.h"
#include
/* ********************* /keys *********************** */
/**
* List of possible options to be passed to
* #TALER_EXCHANGE_connect().
*/
enum TALER_EXCHANGE_Option
{
/**
* Terminator (end of option list).
*/
TALER_EXCHANGE_OPTION_END = 0,
/**
* Followed by a "const json_t *" that was previously returned for
* this exchange URL by #TALER_EXCHANGE_serialize_data(). Used to
* resume a connection to an exchange without having to re-download
* /keys data (or at least only download the deltas).
*/
TALER_EXCHANGE_OPTION_DATA
};
/**
* @brief Exchange's signature key
*/
struct TALER_EXCHANGE_SigningPublicKey
{
/**
* The signing public key
*/
struct TALER_ExchangePublicKeyP key;
/**
* Signature over this signing key by the exchange's master signature.
*/
struct TALER_MasterSignatureP master_sig;
/**
* Validity start time
*/
struct GNUNET_TIME_Timestamp valid_from;
/**
* Validity expiration time (how long the exchange may use it).
*/
struct GNUNET_TIME_Timestamp valid_until;
/**
* Validity expiration time for legal disputes.
*/
struct GNUNET_TIME_Timestamp valid_legal;
};
/**
* @brief Public information about a exchange's denomination key
*/
struct TALER_EXCHANGE_DenomPublicKey
{
/**
* The public key
*/
struct TALER_DenominationPublicKey key;
/**
* The hash of the public key.
*/
struct TALER_DenominationHashP h_key;
/**
* Exchange's master signature over this denomination record.
*/
struct TALER_MasterSignatureP master_sig;
/**
* Timestamp indicating when the denomination key becomes valid
*/
struct GNUNET_TIME_Timestamp valid_from;
/**
* Timestamp indicating when the denomination key can’t be used anymore to
* withdraw new coins.
*/
struct GNUNET_TIME_Timestamp withdraw_valid_until;
/**
* Timestamp indicating when coins of this denomination become invalid.
*/
struct GNUNET_TIME_Timestamp expire_deposit;
/**
* When do signatures with this denomination key become invalid?
* After this point, these signatures cannot be used in (legal)
* disputes anymore, as the Exchange is then allowed to destroy its side
* of the evidence. @e expire_legal is expected to be significantly
* larger than @e expire_deposit (by a year or more).
*/
struct GNUNET_TIME_Timestamp expire_legal;
/**
* The value of this denomination
*/
struct TALER_Amount value;
/**
* The applicable fees for this denomination
*/
struct TALER_DenomFeeSet fees;
/**
* Set to true if this denomination key has been
* revoked by the exchange.
*/
bool revoked;
};
/**
* Information we track per denomination audited by the auditor.
*/
struct TALER_EXCHANGE_AuditorDenominationInfo
{
/**
* Signature by the auditor affirming that it is monitoring this
* denomination.
*/
struct TALER_AuditorSignatureP auditor_sig;
/**
* Offsets into the key's main `denom_keys` array identifying the
* denomination being audited by this auditor.
*/
unsigned int denom_key_offset;
};
/**
* @brief Information we get from the exchange about auditors.
*/
struct TALER_EXCHANGE_AuditorInformation
{
/**
* Public key of the auditing institution. Wallets and merchants
* are expected to be configured with a set of public keys of
* auditors that they deem acceptable. These public keys are
* the roots of the Taler PKI.
*/
struct TALER_AuditorPublicKeyP auditor_pub;
/**
* URL of the auditing institution. Signed by the auditor's public
* key, this URL is a place where applications can direct users for
* additional information about the auditor. In the future, there
* should also be an auditor API for automated submission about
* claims of misbehaving exchange providers.
*/
char *auditor_url;
/**
* Array of length @a num_denom_keys with the denomination
* keys audited by this auditor.
*/
struct TALER_EXCHANGE_AuditorDenominationInfo *denom_keys;
/**
* Number of denomination keys audited by this auditor.
*/
unsigned int num_denom_keys;
};
/**
* Global fees and options of an exchange for a given time period.
*/
struct TALER_EXCHANGE_GlobalFee
{
/**
* Signature affirming all of the data.
*/
struct TALER_MasterSignatureP master_sig;
/**
* Starting time of the validity period (inclusive).
*/
struct GNUNET_TIME_Timestamp start_date;
/**
* End time of the validity period (exclusive).
*/
struct GNUNET_TIME_Timestamp end_date;
/**
* Unmerged purses will be timed out after at most this time.
*/
struct GNUNET_TIME_Relative purse_timeout;
/**
* Account history is limited to this timeframe.
*/
struct GNUNET_TIME_Relative history_expiration;
/**
* Fees that apply globally, independent of denomination
* and wire method.
*/
struct TALER_GlobalFeeSet fees;
/**
* Number of free purses per account.
*/
uint32_t purse_account_limit;
};
/**
* @brief Information about keys from the exchange.
*/
struct TALER_EXCHANGE_Keys
{
/**
* Long-term offline signing key of the exchange.
*/
struct TALER_MasterPublicKeyP master_pub;
/**
* Array of the exchange's online signing keys.
*/
struct TALER_EXCHANGE_SigningPublicKey *sign_keys;
/**
* Array of the exchange's denomination keys.
*/
struct TALER_EXCHANGE_DenomPublicKey *denom_keys;
/**
* Array of the keys of the auditors of the exchange.
*/
struct TALER_EXCHANGE_AuditorInformation *auditors;
/**
* Array with the global fees of the exchange.
*/
struct TALER_EXCHANGE_GlobalFee *global_fees;
/**
* Supported Taler protocol version by the exchange.
* String in the format current:revision:age using the
* semantics of GNU libtool. See
* https://www.gnu.org/software/libtool/manual/html_node/Versioning.html#Versioning
*/
char *version;
/**
* Supported currency of the exchange.
*/
char *currency;
/**
* How long after a reserve went idle will the exchange close it?
* This is an approximate number, not cryptographically signed by
* the exchange (advisory-only, may change anytime).
*/
struct GNUNET_TIME_Relative reserve_closing_delay;
/**
* Array of amounts a wallet is allowed to hold from
* this exchange before it must undergo further KYC checks.
*/
struct TALER_Amount *wallet_balance_limit_without_kyc;
/**
* Length of the @e wallet_balance_limit_without_kyc
* array.
*/
unsigned int wblwk_length;
/**
* Timestamp indicating the /keys generation.
*/
struct GNUNET_TIME_Timestamp list_issue_date;
/**
* Timestamp indicating the creation time of the last
* denomination key in /keys.
* Used to fetch /keys incrementally.
*/
struct GNUNET_TIME_Timestamp last_denom_issue_date;
/**
* If age restriction is enabled on the exchange, we get an non-zero age_mask
*/
struct TALER_AgeMask age_mask;
/**
* Length of the @e global_fees array.
*/
unsigned int num_global_fees;
/**
* Length of the @e sign_keys array (number of valid entries).
*/
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;
/**
* Actual length of the @e auditors array (size of allocation).
*/
unsigned int auditors_size;
/**
* Actual length of the @e denom_keys array (size of allocation).
*/
unsigned int denom_keys_size;
};
/**
* How compatible are the protocol version of the exchange and this
* client? The bits (1,2,4) can be used to test if the exchange's
* version is incompatible, older or newer respectively.
*/
enum TALER_EXCHANGE_VersionCompatibility
{
/**
* The exchange runs exactly the same protocol version.
*/
TALER_EXCHANGE_VC_MATCH = 0,
/**
* The exchange is too old or too new to be compatible with this
* implementation (bit)
*/
TALER_EXCHANGE_VC_INCOMPATIBLE = 1,
/**
* The exchange is older than this implementation (bit)
*/
TALER_EXCHANGE_VC_OLDER = 2,
/**
* The exchange is too old to be compatible with
* this implementation.
*/
TALER_EXCHANGE_VC_INCOMPATIBLE_OUTDATED
= TALER_EXCHANGE_VC_INCOMPATIBLE
| TALER_EXCHANGE_VC_OLDER,
/**
* The exchange is more recent than this implementation (bit).
*/
TALER_EXCHANGE_VC_NEWER = 4,
/**
* The exchange is too recent for this implementation.
*/
TALER_EXCHANGE_VC_INCOMPATIBLE_NEWER
= TALER_EXCHANGE_VC_INCOMPATIBLE
| TALER_EXCHANGE_VC_NEWER,
/**
* We could not even parse the version data.
*/
TALER_EXCHANGE_VC_PROTOCOL_ERROR = 8
};
/**
* General information about the HTTP response we obtained
* from the exchange for a request.
*/
struct TALER_EXCHANGE_HttpResponse
{
/**
* The complete JSON reply. NULL if we failed to parse the
* reply (too big, invalid JSON).
*/
const json_t *reply;
/**
* Set to the human-readable 'hint' that is optionally
* provided by the exchange together with errors. NULL
* if no hint was provided or if there was no error.
*/
const char *hint;
/**
* HTTP status code for the response. 0 if the
* HTTP request failed and we did not get any answer, or
* if the answer was invalid and we set @a ec to a
* client-side error code.
*/
unsigned int http_status;
/**
* Taler error code. #TALER_EC_NONE if everything was
* OK. Usually set to the "code" field of an error
* response, but may be set to values created at the
* client side, for example when the response was
* not in JSON format or was otherwise ill-formed.
*/
enum TALER_ErrorCode ec;
};
/**
* Function called with information about who is auditing
* a particular exchange and what keys the exchange is using.
*
* @param cls closure
* @param hr HTTP response data
* @param keys information about the various keys used
* by the exchange, NULL if /keys failed
* @param compat protocol compatibility information
*/
typedef void
(*TALER_EXCHANGE_CertificationCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr,
const struct TALER_EXCHANGE_Keys *keys,
enum TALER_EXCHANGE_VersionCompatibility compat);
/**
* @brief Handle to the exchange. This is where we interact with
* a particular exchange and keep the per-exchange information.
*/
struct TALER_EXCHANGE_Handle;
/**
* Initialise a connection to the exchange. Will connect to the
* exchange and obtain information about the exchange's master public
* key and the exchange's auditor. The respective information will
* be passed to the @a cert_cb once available, and all future
* interactions with the exchange will be checked to be signed
* (where appropriate) by the respective master key.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param cert_cb function to call with the exchange's certification information,
* possibly called repeatedly if the information changes
* @param cert_cb_cls closure for @a cert_cb
* @param ... list of additional arguments, terminated by #TALER_EXCHANGE_OPTION_END.
* @return the exchange handle; NULL upon error
*/
struct TALER_EXCHANGE_Handle *
TALER_EXCHANGE_connect (struct GNUNET_CURL_Context *ctx,
const char *url,
TALER_EXCHANGE_CertificationCallback cert_cb,
void *cert_cb_cls,
...);
/**
* Serialize the latest key data from @a exchange to be persisted
* on disk (to be used with #TALER_EXCHANGE_OPTION_DATA to more
* efficiently recover the state).
*
* @param exchange which exchange's key and wire data should be serialized
* @return NULL on error (i.e. no current data available); otherwise
* json object owned by the caller
*/
json_t *
TALER_EXCHANGE_serialize_data (struct TALER_EXCHANGE_Handle *exchange);
/**
* Disconnect from the exchange.
*
* @param exchange the exchange handle
*/
void
TALER_EXCHANGE_disconnect (struct TALER_EXCHANGE_Handle *exchange);
/**
* Obtain the keys from the exchange.
*
* @param exchange the exchange handle
* @return the exchange's key set
*/
const struct TALER_EXCHANGE_Keys *
TALER_EXCHANGE_get_keys (struct TALER_EXCHANGE_Handle *exchange);
/**
* Let the user set the last valid denomination time manually.
*
* @param exchange the exchange handle.
* @param last_denom_new new last denomination time.
*/
void
TALER_EXCHANGE_set_last_denom (struct TALER_EXCHANGE_Handle *exchange,
struct GNUNET_TIME_Timestamp last_denom_new);
/**
* Flags for #TALER_EXCHANGE_check_keys_current().
*/
enum TALER_EXCHANGE_CheckKeysFlags
{
/**
* No special options.
*/
TALER_EXCHANGE_CKF_NONE,
/**
* Force downloading /keys now, even if /keys is still valid
* (that is, the period advertised by the exchange for re-downloads
* has not yet expired).
*/
TALER_EXCHANGE_CKF_FORCE_DOWNLOAD = 1,
/**
* Pull all keys again, resetting the client state to the original state.
* Using this flag disables the incremental download, and also prevents using
* the context until the re-download has completed.
*/
TALER_EXCHANGE_CKF_PULL_ALL_KEYS = 2,
/**
* Force downloading all keys now.
*/
TALER_EXCHANGE_CKF_FORCE_ALL_NOW = TALER_EXCHANGE_CKF_FORCE_DOWNLOAD
| TALER_EXCHANGE_CKF_PULL_ALL_KEYS
};
/**
* Check if our current response for /keys is valid, and if
* not, trigger /keys download.
*
* @param exchange exchange to check keys for
* @param flags options controlling when to download what
* @return until when the existing response is current, 0 if we are re-downloading now
*/
struct GNUNET_TIME_Timestamp
TALER_EXCHANGE_check_keys_current (struct TALER_EXCHANGE_Handle *exchange,
enum TALER_EXCHANGE_CheckKeysFlags flags);
/**
* Obtain the keys from the exchange in the raw JSON format.
*
* @param exchange the exchange handle
* @return the exchange's keys in raw JSON
*/
json_t *
TALER_EXCHANGE_get_keys_raw (struct TALER_EXCHANGE_Handle *exchange);
/**
* Test if the given @a pub is a the current signing key from the exchange
* according to @a keys.
*
* @param keys the exchange's key set
* @param pub claimed current online signing key for the exchange
* @return #GNUNET_OK if @a pub is (according to /keys) a current signing key
*/
enum GNUNET_GenericReturnValue
TALER_EXCHANGE_test_signing_key (const struct TALER_EXCHANGE_Keys *keys,
const struct TALER_ExchangePublicKeyP *pub);
/**
* Get exchange's base URL.
*
* @param exchange exchange handle.
* @return the base URL from the handle.
*/
const char *
TALER_EXCHANGE_get_base_url (const struct TALER_EXCHANGE_Handle *exchange);
/**
* Obtain the denomination key details from the exchange.
*
* @param keys the exchange's key set
* @param pk public key of the denomination to lookup
* @return details about the given denomination key, NULL if the key is not
* found
*/
const struct TALER_EXCHANGE_DenomPublicKey *
TALER_EXCHANGE_get_denomination_key (
const struct TALER_EXCHANGE_Keys *keys,
const struct TALER_DenominationPublicKey *pk);
/**
* Obtain the global fee details from the exchange.
*
* @param keys the exchange's key set
* @param ts time for when to fetch the fees
* @return details about the fees, NULL if no fees are known at @a ts
*/
const struct TALER_EXCHANGE_GlobalFee *
TALER_EXCHANGE_get_global_fee (
const struct TALER_EXCHANGE_Keys *keys,
struct GNUNET_TIME_Timestamp ts);
/**
* Create a copy of a denomination public key.
*
* @param key key to copy
* @returns a copy, must be freed with #TALER_EXCHANGE_destroy_denomination_key
*/
struct TALER_EXCHANGE_DenomPublicKey *
TALER_EXCHANGE_copy_denomination_key (
const struct TALER_EXCHANGE_DenomPublicKey *key);
/**
* Destroy a denomination public key.
* Should only be called with keys created by #TALER_EXCHANGE_copy_denomination_key.
*
* @param key key to destroy.
*/
void
TALER_EXCHANGE_destroy_denomination_key (
struct TALER_EXCHANGE_DenomPublicKey *key);
/**
* Obtain the denomination key details from the exchange.
*
* @param keys the exchange's key set
* @param hc hash of the public key of the denomination to lookup
* @return details about the given denomination key
*/
const struct TALER_EXCHANGE_DenomPublicKey *
TALER_EXCHANGE_get_denomination_key_by_hash (
const struct TALER_EXCHANGE_Keys *keys,
const struct TALER_DenominationHashP *hc);
/**
* Obtain meta data about an exchange (online) signing
* key.
*
* @param keys from where to obtain the meta data
* @param exchange_pub public key to lookup
* @return NULL on error (@a exchange_pub not known)
*/
const struct TALER_EXCHANGE_SigningPublicKey *
TALER_EXCHANGE_get_signing_key_info (
const struct TALER_EXCHANGE_Keys *keys,
const struct TALER_ExchangePublicKeyP *exchange_pub);
/* ********************* /wire *********************** */
/**
* Sorted list of fees to be paid for aggregate wire transfers.
*/
struct TALER_EXCHANGE_WireAggregateFees
{
/**
* This is a linked list.
*/
struct TALER_EXCHANGE_WireAggregateFees *next;
/**
* Fee to be paid whenever the exchange wires funds to the merchant.
*/
struct TALER_WireFeeSet fees;
/**
* Time when this fee goes into effect (inclusive)
*/
struct GNUNET_TIME_Timestamp start_date;
/**
* Time when this fee stops being in effect (exclusive).
*/
struct GNUNET_TIME_Timestamp end_date;
/**
* Signature affirming the above fee structure.
*/
struct TALER_MasterSignatureP master_sig;
};
/**
* Information about a wire account of the exchange.
*/
struct TALER_EXCHANGE_WireAccount
{
/**
* payto://-URI of the exchange.
*/
const char *payto_uri;
/**
* Signature of the exchange over the account (was checked by the API).
*/
struct TALER_MasterSignatureP master_sig;
/**
* Linked list of wire fees the exchange charges for
* accounts of the wire method matching @e payto_uri.
*/
const struct TALER_EXCHANGE_WireAggregateFees *fees;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* wire format inquiry request to a exchange.
*
* If the request fails to generate a valid response from the
* exchange, @a http_status will also be zero.
*
* @param cls closure
* @param hr HTTP response data
* @param accounts_len length of the @a accounts array
* @param accounts list of wire accounts of the exchange, NULL on error
*/
typedef void
(*TALER_EXCHANGE_WireCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr,
unsigned int accounts_len,
const struct TALER_EXCHANGE_WireAccount *accounts);
/**
* @brief A Wire format inquiry handle
*/
struct TALER_EXCHANGE_WireHandle;
/**
* Obtain information about a exchange's wire instructions. A
* exchange may provide wire instructions for creating a reserve. The
* wire instructions also indicate which wire formats merchants may
* use with the exchange. 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 exchange's reply is not
* well-formed, we return an HTTP status code of zero to @a cb.
*
* @param exchange the exchange handle; the exchange 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_EXCHANGE_WireHandle *
TALER_EXCHANGE_wire (struct TALER_EXCHANGE_Handle *exchange,
TALER_EXCHANGE_WireCallback 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_EXCHANGE_wire_cancel (struct TALER_EXCHANGE_WireHandle *wh);
/* ********************* /coins/$COIN_PUB/deposit *********************** */
/**
* Information needed for a coin to be deposited.
*/
struct TALER_EXCHANGE_CoinDepositDetail
{
/**
* The amount to be deposited.
*/
struct TALER_Amount amount;
/**
* Hash over the age commitment of the coin.
*/
struct TALER_AgeCommitmentHash h_age_commitment;
/**
* The coin’s public key.
*/
struct TALER_CoinSpendPublicKeyP coin_pub;
/**
* The signature made with purpose #TALER_SIGNATURE_WALLET_COIN_DEPOSIT made
* by the customer with the coin’s private key.
*/
struct TALER_CoinSpendSignatureP coin_sig;
/**
* Exchange’s unblinded signature of the coin.
*/
struct TALER_DenominationSignature denom_sig;
/**
* Hash of the public key of the coin.
*/
struct TALER_DenominationHashP h_denom_pub;
};
/**
* Meta information about the contract relevant for a coin's deposit
* operation.
*/
struct TALER_EXCHANGE_DepositContractDetail
{
/**
* Execution date, until which the merchant would like the exchange to
* settle the balance (advisory, the exchange cannot be forced to settle in
* the past or upon very short notice, but of course a well-behaved exchange
* will limit aggregation based on the advice received).
*/
struct GNUNET_TIME_Timestamp wire_deadline;
/**
* The merchant’s account details, in the payto://-format supported by the
* exchange.
*/
const char *merchant_payto_uri;
/**
* Salt used to hash the @e merchant_payto_uri.
*/
struct TALER_WireSaltP wire_salt;
/**
* Hash of the contact of the merchant with the customer (further details
* are never disclosed to the exchange)
*/
struct TALER_PrivateContractHashP h_contract_terms;
/**
* Policy extension specific details about the deposit relevant to the exchange.
*/
json_t *policy_details;
/**
* Timestamp when the contract was finalized, must match approximately the
* current time of the exchange.
*/
struct GNUNET_TIME_Timestamp timestamp;
/**
* The public key of the merchant (used to identify the merchant for refund
* requests).
*/
struct TALER_MerchantPublicKeyP merchant_pub;
/**
* Date until which the merchant can issue a refund to the customer via the
* exchange (can be zero if refunds are not allowed); must not be after the
* @e wire_deadline.
*/
struct GNUNET_TIME_Timestamp refund_deadline;
};
/**
* @brief A Deposit Handle
*/
struct TALER_EXCHANGE_DepositHandle;
/**
* Structure with information about a deposit
* operation's result.
*/
struct TALER_EXCHANGE_DepositResult
{
/**
* HTTP response data
*/
struct TALER_EXCHANGE_HttpResponse hr;
union
{
/**
* Information returned if the HTTP status is
* #MHD_HTTP_OK.
*/
struct
{
/**
* Time when the exchange generated the deposit confirmation
*/
struct GNUNET_TIME_Timestamp deposit_timestamp;
/**
* signature provided by the exchange
*/
const struct TALER_ExchangeSignatureP *exchange_sig;
/**
* exchange key used to sign @a exchange_sig.
*/
const struct TALER_ExchangePublicKeyP *exchange_pub;
/**
* Base URL for looking up wire transfers, or
* NULL to use the default base URL.
*/
const char *transaction_base_url;
} success;
/**
* Information returned if the HTTP status is
* #MHD_HTTP_CONFLICT.
*/
struct
{
/* TODO: returning full details is not implemented */
} conflict;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* deposit permission request to a exchange.
*
* @param cls closure
* @param dr deposit response details
*/
typedef void
(*TALER_EXCHANGE_DepositResultCallback) (
void *cls,
const struct TALER_EXCHANGE_DepositResult *dr);
/**
* Submit a deposit permission to the exchange and get the exchange'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 exchange's reply is not well-formed, we return an HTTP status code
* of zero to @a cb.
*
* We also verify that the @a cdd.coin_sig is valid for this deposit
* request, and that the @a cdd.ub_sig is a valid signature for @a
* coin_pub. Also, the @a exchange 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 exchange and instead return NULL.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param dcd details about the contract the deposit is for
* @param cdd details about the coin to be deposited
* @param cb the callback to call when a reply for this request is available
* @param cb_cls closure for the above callback
* @param[out] ec if NULL is returned, set to the error code explaining why the operation failed
* @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_EXCHANGE_DepositHandle *
TALER_EXCHANGE_deposit (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_EXCHANGE_DepositContractDetail *dcd,
const struct TALER_EXCHANGE_CoinDepositDetail *cdd,
TALER_EXCHANGE_DepositResultCallback cb,
void *cb_cls,
enum TALER_ErrorCode *ec);
/**
* Change the chance that our deposit confirmation will be given to the
* auditor to 100%.
*
* @param deposit the deposit permission request handle
*/
void
TALER_EXCHANGE_deposit_force_dc (struct TALER_EXCHANGE_DepositHandle *deposit);
/**
* 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_EXCHANGE_deposit_cancel (struct TALER_EXCHANGE_DepositHandle *deposit);
/**
* @brief A Batch Deposit Handle
*/
struct TALER_EXCHANGE_BatchDepositHandle;
/**
* Structure with information about a batch deposit
* operation's result.
*/
struct TALER_EXCHANGE_BatchDepositResult
{
/**
* HTTP response data
*/
struct TALER_EXCHANGE_HttpResponse hr;
union
{
/**
* Information returned if the HTTP status is
* #MHD_HTTP_OK.
*/
struct
{
/**
* Time when the exchange generated the batch deposit confirmation
*/
struct GNUNET_TIME_Timestamp deposit_timestamp;
/**
* Array of signatures provided by the exchange
*/
const struct TALER_ExchangeSignatureP *exchange_sigs;
/**
* exchange key used to sign @a exchange_sig.
*/
const struct TALER_ExchangePublicKeyP *exchange_pub;
/**
* Base URL for looking up wire transfers, or
* NULL to use the default base URL.
*/
const char *transaction_base_url;
/**
* Length of the @e exchange_sigs array.
*/
unsigned int num_signatures;
} success;
/**
* Information returned if the HTTP status is
* #MHD_HTTP_CONFLICT.
*/
struct
{
/* TODO: returning full details is not implemented */
} conflict;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* deposit permission request to a exchange.
*
* @param cls closure
* @param dr deposit response details
*/
typedef void
(*TALER_EXCHANGE_BatchDepositResultCallback) (
void *cls,
const struct TALER_EXCHANGE_BatchDepositResult *dr);
/**
* Submit a batch of deposit permissions to the exchange and get the
* exchange'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 exchange's reply is not
* well-formed, we return an HTTP status code of zero to @a cb.
*
* We also verify that the @a cdds.coin_sig are valid for this deposit
* request, and that the @a cdds.ub_sig are a valid signatures for @a
* coin_pub. Also, the @a exchange 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 exchange and instead return NULL.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param dcd details about the contract the deposit is for
* @param num_cdds length of the @a cdds array
* @param cdds array with details about the coins to be deposited
* @param cb the callback to call when a reply for this request is available
* @param cb_cls closure for the above callback
* @param[out] ec if NULL is returned, set to the error code explaining why the operation failed
* @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_EXCHANGE_BatchDepositHandle *
TALER_EXCHANGE_batch_deposit (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_EXCHANGE_DepositContractDetail *dcd,
unsigned int num_cdds,
const struct TALER_EXCHANGE_CoinDepositDetail *cdds,
TALER_EXCHANGE_BatchDepositResultCallback cb,
void *cb_cls,
enum TALER_ErrorCode *ec);
/**
* Change the chance that our deposit confirmation will be given to the
* auditor to 100%.
*
* @param deposit the batch deposit permission request handle
*/
void
TALER_EXCHANGE_batch_deposit_force_dc (struct
TALER_EXCHANGE_BatchDepositHandle *
deposit);
/**
* Cancel a batch 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_EXCHANGE_batch_deposit_cancel (struct
TALER_EXCHANGE_BatchDepositHandle *deposit);
/* ********************* /coins/$COIN_PUB/refund *********************** */
/**
* @brief A Refund Handle
*/
struct TALER_EXCHANGE_RefundHandle;
/**
* Callbacks of this type are used to serve the result of submitting a
* refund request to an exchange.
*
* @param cls closure
* @param hr HTTP response data
* @param sign_key exchange key used to sign @a obj, or NULL
* @param signature the actual signature, or NULL on error
*/
typedef void
(*TALER_EXCHANGE_RefundCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr,
const struct TALER_ExchangePublicKeyP *sign_key,
const struct TALER_ExchangeSignatureP *signature);
/**
* Submit a refund request to the exchange and get the exchange's response.
* This API is 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 exchange's reply is not well-formed, we return an
* HTTP status code of zero to @a cb.
*
* The @a exchange must be ready to operate (i.e. have
* finished processing the /keys reply). If this check fails, we do
* NOT initiate the transaction with the exchange and instead return NULL.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param amount the amount to be refunded; must be larger than the refund fee
* (as that fee is still being subtracted), and smaller than the amount
* (with deposit fee) of the original deposit contribution of this coin
* @param h_contract_terms hash of the contact of the merchant with the customer that is being refunded
* @param coin_pub coin’s public key of the coin from the original deposit operation
* @param rtransaction_id transaction id for the transaction between merchant and customer (of refunding operation);
* this is needed as we may first do a partial refund and later a full refund. If both
* refunds are also over the same amount, we need the @a rtransaction_id to make the disjoint
* refund requests different (as requests are idempotent and otherwise the 2nd refund might not work).
* @param merchant_priv the private key of the merchant, used to generate signature for refund request
* @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_EXCHANGE_RefundHandle *
TALER_EXCHANGE_refund (struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_Amount *amount,
const struct
TALER_PrivateContractHashP *h_contract_terms,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
uint64_t rtransaction_id,
const struct TALER_MerchantPrivateKeyP *merchant_priv,
TALER_EXCHANGE_RefundCallback cb,
void *cb_cls);
/**
* Cancel a refund permission request. This function cannot be used
* on a request handle if a response is already served for it. If
* this function is called, the refund may or may not have happened.
* However, it is fine to try to refund the coin a second time.
*
* @param refund the refund request handle
*/
void
TALER_EXCHANGE_refund_cancel (struct TALER_EXCHANGE_RefundHandle *refund);
/* ********************* POST /csr-melt *********************** */
/**
* @brief A /csr-melt Handle
*/
struct TALER_EXCHANGE_CsRMeltHandle;
/**
* Details about a response for a CS R request.
*/
struct TALER_EXCHANGE_CsRMeltResponse
{
/**
* HTTP response data.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details about the response.
*/
union
{
/**
* Details if the status is #MHD_HTTP_OK.
*/
struct
{
/**
* Length of the @e alg_values array.
*/
unsigned int alg_values_len;
/**
* Values contributed by the exchange for the
* respective coin's withdraw operation.
*/
const struct TALER_ExchangeWithdrawValues *alg_values;
} success;
/**
* Details if the status is #MHD_HTTP_GONE.
*/
struct
{
/* TODO: returning full details is not implemented */
} gone;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* CS R request to a exchange.
*
* @param cls closure
* @param csrr response details
*/
typedef void
(*TALER_EXCHANGE_CsRMeltCallback) (
void *cls,
const struct TALER_EXCHANGE_CsRMeltResponse *csrr);
/**
* Information we pass per coin to a /csr-melt request.
*/
struct TALER_EXCHANGE_NonceKey
{
/**
* Which denomination key is the /csr-melt request for?
*/
const struct TALER_EXCHANGE_DenomPublicKey *pk;
/**
* What is number to derive the client nonce for the
* fresh coin?
*/
uint32_t cnc_num;
};
/**
* Get a set of CS R values using a /csr-melt request.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param rms master key used for the derivation of the CS values
* @param nks_len length of the @a nks array
* @param nks array of denominations and nonces
* @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 handle for the operation on success, NULL on error, i.e.
* if the inputs are invalid (i.e. denomination key not with this exchange).
* In this case, the callback is not called.
*/
struct TALER_EXCHANGE_CsRMeltHandle *
TALER_EXCHANGE_csr_melt (struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_RefreshMasterSecretP *rms,
unsigned int nks_len,
struct TALER_EXCHANGE_NonceKey *nks,
TALER_EXCHANGE_CsRMeltCallback res_cb,
void *res_cb_cls);
/**
*
* Cancel a CS R melt request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param csrh the withdraw handle
*/
void
TALER_EXCHANGE_csr_melt_cancel (struct TALER_EXCHANGE_CsRMeltHandle *csrh);
/* ********************* POST /csr-withdraw *********************** */
/**
* @brief A /csr-withdraw Handle
*/
struct TALER_EXCHANGE_CsRWithdrawHandle;
/**
* Details about a response for a CS R request.
*/
struct TALER_EXCHANGE_CsRWithdrawResponse
{
/**
* HTTP response data.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details about the response.
*/
union
{
/**
* Details if the status is #MHD_HTTP_OK.
*/
struct
{
/**
* Values contributed by the exchange for the
* respective coin's withdraw operation.
*/
struct TALER_ExchangeWithdrawValues alg_values;
} success;
/**
* Details if the status is #MHD_HTTP_GONE.
*/
struct
{
/* TODO: returning full details is not implemented */
} gone;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* CS R withdraw request to a exchange.
*
* @param cls closure
* @param csrr response details
*/
typedef void
(*TALER_EXCHANGE_CsRWithdrawCallback) (
void *cls,
const struct TALER_EXCHANGE_CsRWithdrawResponse *csrr);
/**
* Get a CS R using a /csr-withdraw request.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param pk Which denomination key is the /csr request for
* @param nonce client nonce for the request
* @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 handle for the operation on success, NULL on error, i.e.
* if the inputs are invalid (i.e. denomination key not with this exchange).
* In this case, the callback is not called.
*/
struct TALER_EXCHANGE_CsRWithdrawHandle *
TALER_EXCHANGE_csr_withdraw (struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_EXCHANGE_DenomPublicKey *pk,
const struct TALER_CsNonce *nonce,
TALER_EXCHANGE_CsRWithdrawCallback res_cb,
void *res_cb_cls);
/**
*
* Cancel a CS R withdraw request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param csrh the withdraw handle
*/
void
TALER_EXCHANGE_csr_withdraw_cancel (
struct TALER_EXCHANGE_CsRWithdrawHandle *csrh);
/* ********************* GET /reserves/$RESERVE_PUB *********************** */
/**
* Ways how a reserve's balance may change.
*/
enum TALER_EXCHANGE_ReserveTransactionType
{
/**
* Deposit into the reserve.
*/
TALER_EXCHANGE_RTT_CREDIT,
/**
* Withdrawal from the reserve.
*/
TALER_EXCHANGE_RTT_WITHDRAWAL,
/**
* /recoup operation.
*/
TALER_EXCHANGE_RTT_RECOUP,
/**
* Reserve closed operation.
*/
TALER_EXCHANGE_RTT_CLOSING,
/**
* Reserve history request.
*/
TALER_EXCHANGE_RTT_HISTORY,
/**
* Reserve purse merge operation.
*/
TALER_EXCHANGE_RTT_MERGE,
/**
* Reserve open request operation.
*/
TALER_EXCHANGE_RTT_OPEN,
/**
* Reserve close request operation.
*/
TALER_EXCHANGE_RTT_CLOSE
};
/**
* @brief Entry in the reserve's transaction history.
*/
struct TALER_EXCHANGE_ReserveHistoryEntry
{
/**
* Type of the transaction.
*/
enum TALER_EXCHANGE_ReserveTransactionType type;
/**
* Amount transferred (in or out).
*/
struct TALER_Amount amount;
/**
* Details depending on @e type.
*/
union
{
/**
* Information about a deposit that filled this reserve.
* @e type is #TALER_EXCHANGE_RTT_CREDIT.
*/
struct
{
/**
* Sender account payto://-URL of the incoming transfer.
*/
char *sender_url;
/**
* Information that uniquely identifies the wire transfer.
*/
uint64_t wire_reference;
/**
* When did the wire transfer happen?
*/
struct GNUNET_TIME_Timestamp timestamp;
} in_details;
/**
* Information about withdraw operation.
* @e type is #TALER_EXCHANGE_RTT_WITHDRAWAL.
*/
struct
{
/**
* Signature authorizing the withdrawal for outgoing transaction.
*/
json_t *out_authorization_sig;
/**
* Fee that was charged for the withdrawal.
*/
struct TALER_Amount fee;
} withdraw;
/**
* Information provided if the reserve was filled via /recoup.
* @e type is #TALER_EXCHANGE_RTT_RECOUP.
*/
struct
{
/**
* Public key of the coin that was paid back.
*/
struct TALER_CoinSpendPublicKeyP coin_pub;
/**
* Signature of the coin of type
* #TALER_SIGNATURE_EXCHANGE_CONFIRM_RECOUP.
*/
struct TALER_ExchangeSignatureP exchange_sig;
/**
* Public key of the exchange that was used for @e exchange_sig.
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* When did the /recoup operation happen?
*/
struct GNUNET_TIME_Timestamp timestamp;
} recoup_details;
/**
* Information about a close operation of the reserve.
* @e type is #TALER_EXCHANGE_RTT_CLOSE.
*/
struct
{
/**
* Receiver account information for the outgoing wire transfer.
*/
const char *receiver_account_details;
/**
* Wire transfer details for the outgoing wire transfer.
*/
struct TALER_WireTransferIdentifierRawP wtid;
/**
* Signature of the coin of type
* #TALER_SIGNATURE_EXCHANGE_RESERVE_CLOSED.
*/
struct TALER_ExchangeSignatureP exchange_sig;
/**
* Public key of the exchange that was used for @e exchange_sig.
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* When did the wire transfer happen?
*/
struct GNUNET_TIME_Timestamp timestamp;
/**
* Fee that was charged for the closing.
*/
struct TALER_Amount fee;
} close_details;
/**
* Information about a history operation of the reserve.
* @e type is #TALER_EXCHANGE_RTT_HISTORY.
*/
struct
{
/**
* When was the request made.
*/
struct GNUNET_TIME_Timestamp request_timestamp;
/**
* Signature by the reserve approving the history request.
*/
struct TALER_ReserveSignatureP reserve_sig;
} history_details;
/**
* Information about a merge operation on the reserve.
* @e type is #TALER_EXCHANGE_RTT_MERGE.
*/
struct
{
/**
* Fee paid for the purse.
*/
struct TALER_Amount purse_fee;
/**
* Hash over the contract.
*/
struct TALER_PrivateContractHashP h_contract_terms;
/**
* Merge capability key.
*/
struct TALER_PurseMergePublicKeyP merge_pub;
/**
* Purse public key.
*/
struct TALER_PurseContractPublicKeyP purse_pub;
/**
* Signature by the reserve approving the merge.
*/
struct TALER_ReserveSignatureP reserve_sig;
/**
* When was the merge made.
*/
struct GNUNET_TIME_Timestamp merge_timestamp;
/**
* When was the purse set to expire.
*/
struct GNUNET_TIME_Timestamp purse_expiration;
/**
* Minimum age required for depositing into the purse.
*/
uint32_t min_age;
/**
* Flags of the purse.
*/
enum TALER_WalletAccountMergeFlags flags;
/**
* True if the purse was actually merged, false
* if only the @e purse_fee was charged.
*/
bool merged;
} merge_details;
/**
* Information about an open request operation on the reserve.
* @e type is #TALER_EXCHANGE_RTT_OPEN.
*/
struct
{
/**
* Signature by the reserve approving the open.
*/
struct TALER_ReserveSignatureP reserve_sig;
/**
* Amount to be paid from the reserve balance to open
* the reserve.
*/
struct TALER_Amount reserve_payment;
/**
* When was the request created.
*/
struct GNUNET_TIME_Timestamp request_timestamp;
/**
* For how long should the reserve be kept open.
* (Determines amount to be paid.)
*/
struct GNUNET_TIME_Timestamp reserve_expiration;
/**
* How many open purses should be included with the
* open reserve?
* (Determines amount to be paid.)
*/
uint32_t purse_limit;
} open_request;
/**
* Information about an close request operation on the reserve.
* @e type is #TALER_EXCHANGE_RTT_CLOSE.
*/
struct
{
/**
* Signature by the reserve approving the close.
*/
struct TALER_ReserveSignatureP reserve_sig;
/**
* When was the request created.
*/
struct GNUNET_TIME_Timestamp request_timestamp;
/**
* Hash of the payto://-URI of the target account
* for the closure, or all zeros for the reserve
* origin account.
*/
struct TALER_PaytoHashP target_account_h_payto;
} close_request;
} details;
};
/**
* @brief A /reserves/ GET Handle
*/
struct TALER_EXCHANGE_ReservesGetHandle;
/**
* @brief Reserve summary.
*/
struct TALER_EXCHANGE_ReserveSummary
{
/**
* High-level HTTP response details.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on @e hr.http_status.
*/
union
{
/**
* Information returned on success, if
* @e hr.http_status is #MHD_HTTP_OK
*/
struct
{
/**
* Reserve balance.
*/
struct TALER_Amount balance;
} ok;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* reserve status request to a exchange.
*
* @param cls closure
* @param rs HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ReservesGetCallback) (
void *cls,
const struct TALER_EXCHANGE_ReserveSummary *rs);
/**
* Submit a request to obtain the transaction history of a reserve
* from the exchange. 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 exchange's
* reply is not well-formed, we return an HTTP status code of zero to
* @a cb.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param reserve_pub public key of the reserve to inspect
* @param timeout how long to wait for an affirmative reply
* (enables long polling if the reserve does not yet exist)
* @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_EXCHANGE_ReservesGetHandle *
TALER_EXCHANGE_reserves_get (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePublicKeyP *reserve_pub,
struct GNUNET_TIME_Relative timeout,
TALER_EXCHANGE_ReservesGetCallback cb,
void *cb_cls);
/**
* Cancel a reserve GET request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param rgh the reserve request handle
*/
void
TALER_EXCHANGE_reserves_get_cancel (
struct TALER_EXCHANGE_ReservesGetHandle *rgh);
/**
* @brief A /reserves/$RID/status Handle
*/
struct TALER_EXCHANGE_ReservesStatusHandle;
/**
* @brief Reserve status details.
*/
struct TALER_EXCHANGE_ReserveStatus
{
/**
* High-level HTTP response details.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on @e hr.http_status.
*/
union
{
/**
* Information returned on success, if
* @e hr.http_status is #MHD_HTTP_OK
*/
struct
{
/**
* Current reserve balance. May not be the difference between
* @e total_in and @e total_out because the @e may be truncated.
*/
struct TALER_Amount balance;
/**
* Total of all inbound transactions in @e history.
*/
struct TALER_Amount total_in;
/**
* Total of all outbound transactions in @e history.
*/
struct TALER_Amount total_out;
/**
* Reserve history.
*/
const struct TALER_EXCHANGE_ReserveHistoryEntry *history;
/**
* Length of the @e history array.
*/
unsigned int history_len;
} ok;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* reserve status request to a exchange.
*
* @param cls closure
* @param rs HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ReservesStatusCallback) (
void *cls,
const struct TALER_EXCHANGE_ReserveStatus *rs);
/**
* Submit a request to obtain the reserve status.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param reserve_priv private 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_EXCHANGE_ReservesStatusHandle *
TALER_EXCHANGE_reserves_status (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
TALER_EXCHANGE_ReservesStatusCallback cb,
void *cb_cls);
/**
* Cancel a reserve status request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param rsh the reserve request handle
*/
void
TALER_EXCHANGE_reserves_status_cancel (
struct TALER_EXCHANGE_ReservesStatusHandle *rsh);
/**
* @brief A /reserves/$RID/history Handle
*/
struct TALER_EXCHANGE_ReservesHistoryHandle;
/**
* @brief Reserve history details.
*/
struct TALER_EXCHANGE_ReserveHistory
{
/**
* High-level HTTP response details.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Timestamp of when we made the history request
* (client-side).
*/
struct GNUNET_TIME_Timestamp ts;
/**
* Reserve signature affirming the history request
* (generated as part of the request).
*/
const struct TALER_ReserveSignatureP *reserve_sig;
/**
* Details depending on @e hr.http_status.
*/
union
{
/**
* Information returned on success, if
* @e hr.http_status is #MHD_HTTP_OK
*/
struct
{
/**
* Reserve balance. May not be the difference between
* @e total_in and @e total_out because the @e may be truncated
* due to expiration.
*/
struct TALER_Amount balance;
/**
* Total of all inbound transactions in @e history.
*/
struct TALER_Amount total_in;
/**
* Total of all outbound transactions in @e history.
*/
struct TALER_Amount total_out;
/**
* Reserve history.
*/
const struct TALER_EXCHANGE_ReserveHistoryEntry *history;
/**
* Length of the @e history array.
*/
unsigned int history_len;
} ok;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* reserve history request to a exchange.
*
* @param cls closure
* @param rs HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ReservesHistoryCallback) (
void *cls,
const struct TALER_EXCHANGE_ReserveHistory *rs);
/**
* Submit a request to obtain the reserve history.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param reserve_priv private 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_EXCHANGE_ReservesHistoryHandle *
TALER_EXCHANGE_reserves_history (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
TALER_EXCHANGE_ReservesHistoryCallback cb,
void *cb_cls);
/**
* Cancel a reserve history request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param rsh the reserve request handle
*/
void
TALER_EXCHANGE_reserves_history_cancel (
struct TALER_EXCHANGE_ReservesHistoryHandle *rsh);
/* ********************* POST /reserves/$RESERVE_PUB/withdraw *********************** */
/**
* @brief A /reserves/$RESERVE_PUB/withdraw Handle
*/
struct TALER_EXCHANGE_WithdrawHandle;
/**
* Information input into the withdraw process per coin.
*/
struct TALER_EXCHANGE_WithdrawCoinInput
{
/**
* Denomination of the coin.
*/
const struct TALER_EXCHANGE_DenomPublicKey *pk;
/**
* Master key material for the coin.
*/
const struct TALER_PlanchetMasterSecretP *ps;
/**
* Age commitment for the coin.
*/
const struct TALER_AgeCommitmentHash *ach;
};
/**
* All the details about a coin that are generated during withdrawal and that
* may be needed for future operations on the coin.
*/
struct TALER_EXCHANGE_PrivateCoinDetails
{
/**
* Private key of the coin.
*/
struct TALER_CoinSpendPrivateKeyP coin_priv;
/**
* Value used to blind the key for the signature.
* Needed for recoup operations.
*/
union TALER_DenominationBlindingKeyP bks;
/**
* Signature over the coin.
*/
struct TALER_DenominationSignature sig;
/**
* Values contributed from the exchange during the
* withdraw protocol.
*/
struct TALER_ExchangeWithdrawValues exchange_vals;
};
/**
* Details about a response for a withdraw request.
*/
struct TALER_EXCHANGE_WithdrawResponse
{
/**
* HTTP response data.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details about the response.
*/
union
{
/**
* Details if the status is #MHD_HTTP_OK.
*/
struct TALER_EXCHANGE_PrivateCoinDetails success;
/**
* Details if the status is #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS.
*/
struct
{
/**
* Requirement row that the merchant should use
* to check for its KYC status.
*/
uint64_t requirement_row;
/**
* Hash of the payto-URI of the account to KYC;
*/
struct TALER_PaytoHashP h_payto;
} unavailable_for_legal_reasons;
/**
* Details if the status is #MHD_HTTP_CONFLICT.
*/
struct
{
/* TODO: returning full details is not implemented */
} conflict;
/**
* Details if the status is #MHD_HTTP_GONE.
*/
struct
{
/* TODO: returning full details is not implemented */
} gone;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* withdraw request to a exchange.
*
* @param cls closure
* @param wr response details
*/
typedef void
(*TALER_EXCHANGE_WithdrawCallback) (
void *cls,
const struct TALER_EXCHANGE_WithdrawResponse *wr);
/**
* Withdraw a coin from the exchange using a /reserves/$RESERVE_PUB/withdraw
* request. This API is typically used by a wallet to withdraw from a
* reserve.
*
* 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 exchange the exchange handle; the exchange must be ready to operate
* @param reserve_priv private key of the reserve to withdraw from
* @param wci inputs that determine the planchet
* @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 exchange).
* In this case, the callback is not called.
*/
struct TALER_EXCHANGE_WithdrawHandle *
TALER_EXCHANGE_withdraw (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const struct TALER_EXCHANGE_WithdrawCoinInput *wci,
TALER_EXCHANGE_WithdrawCallback 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 wh the withdraw handle
*/
void
TALER_EXCHANGE_withdraw_cancel (struct TALER_EXCHANGE_WithdrawHandle *wh);
/**
* @brief A /reserves/$RESERVE_PUB/batch-withdraw Handle
*/
struct TALER_EXCHANGE_BatchWithdrawHandle;
/**
* Details about a response for a batch withdraw request.
*/
struct TALER_EXCHANGE_BatchWithdrawResponse
{
/**
* HTTP response data.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details about the response.
*/
union
{
/**
* Details if the status is #MHD_HTTP_OK.
*/
struct
{
/**
* Array of coins returned by the batch withdraw operation.
*/
struct TALER_EXCHANGE_PrivateCoinDetails *coins;
/**
* Length of the @e coins array.
*/
unsigned int num_coins;
} success;
/**
* Details if the status is #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS.
*/
struct
{
/**
* Hash of the payto-URI of the account to KYC;
*/
struct TALER_PaytoHashP h_payto;
/**
* Legitimization requirement that the merchant should use
* to check for its KYC status, 0 if not known.
*/
uint64_t requirement_row;
} unavailable_for_legal_reasons;
/**
* Details if the status is #MHD_HTTP_CONFLICT.
*/
struct
{
/* TODO: returning full details is not implemented */
} conflict;
/**
* Details if the status is #MHD_HTTP_GONE.
*/
struct
{
/* TODO: returning full details is not implemented */
} gone;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* batch withdraw request to a exchange.
*
* @param cls closure
* @param wr response details
*/
typedef void
(*TALER_EXCHANGE_BatchWithdrawCallback) (
void *cls,
const struct TALER_EXCHANGE_BatchWithdrawResponse *wr);
/**
* Withdraw multiple coins from the exchange using a /reserves/$RESERVE_PUB/batch-withdraw
* request. This API is typically used by a wallet to withdraw many coins from a
* reserve.
*
* 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 exchange the exchange handle; the exchange must be ready to operate
* @param reserve_priv private key of the reserve to withdraw from
* @param wcis inputs that determine the planchets
* @param wci_length number of entries in @a wcis
* @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 exchange).
* In this case, the callback is not called.
*/
struct TALER_EXCHANGE_BatchWithdrawHandle *
TALER_EXCHANGE_batch_withdraw (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const struct TALER_EXCHANGE_WithdrawCoinInput *wcis,
unsigned int wci_length,
TALER_EXCHANGE_BatchWithdrawCallback res_cb,
void *res_cb_cls);
/**
* Cancel a batch withdraw status request. This function cannot be used on a
* request handle if a response is already served for it.
*
* @param wh the batch withdraw handle
*/
void
TALER_EXCHANGE_batch_withdraw_cancel (
struct TALER_EXCHANGE_BatchWithdrawHandle *wh);
/**
* Callbacks of this type are used to serve the result of submitting a
* withdraw request to a exchange without the (un)blinding factor.
*
* @param cls closure
* @param hr HTTP response data
* @param blind_sig blind signature over the coin, NULL on error
*/
typedef void
(*TALER_EXCHANGE_Withdraw2Callback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr,
const struct TALER_BlindedDenominationSignature *blind_sig);
/**
* @brief A /reserves/$RESERVE_PUB/withdraw Handle, 2nd variant.
* This variant does not do the blinding/unblinding and only
* fetches the blind signature on the already blinded planchet.
* Used internally by the `struct TALER_EXCHANGE_WithdrawHandle`
* implementation as well as for the tipping logic of merchants.
*/
struct TALER_EXCHANGE_Withdraw2Handle;
/**
* Withdraw a coin from the exchange using a /reserves/$RESERVE_PUB/withdraw
* request. This API is typically used by a merchant to withdraw a tip
* where the blinding factor is unknown to the merchant.
*
* 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 exchange the exchange handle; the exchange must be ready to operate
* @param pd planchet details of the planchet to withdraw
* @param reserve_priv private key of the reserve to withdraw from
* @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 exchange).
* In this case, the callback is not called.
*/
struct TALER_EXCHANGE_Withdraw2Handle *
TALER_EXCHANGE_withdraw2 (struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_PlanchetDetail *pd,
const struct TALER_ReservePrivateKeyP *reserve_priv,
TALER_EXCHANGE_Withdraw2Callback 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 wh the withdraw handle
*/
void
TALER_EXCHANGE_withdraw2_cancel (struct TALER_EXCHANGE_Withdraw2Handle *wh);
/**
* Callbacks of this type are used to serve the result of submitting a batch
* withdraw request to a exchange without the (un)blinding factor.
*
* @param cls closure
* @param hr HTTP response data
* @param blind_sigs array of blind signatures over the coins, NULL on error
* @param blind_sigs_length length of @a blind_sigs
*/
typedef void
(*TALER_EXCHANGE_BatchWithdraw2Callback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr,
const struct TALER_BlindedDenominationSignature *blind_sigs,
unsigned int blind_sigs_length);
/**
* @brief A /reserves/$RESERVE_PUB/batch-withdraw Handle, 2nd variant.
* This variant does not do the blinding/unblinding and only
* fetches the blind signatures on the already blinded planchets.
* Used internally by the `struct TALER_EXCHANGE_BatchWithdrawHandle`
* implementation as well as for the tipping logic of merchants.
*/
struct TALER_EXCHANGE_BatchWithdraw2Handle;
/**
* Withdraw a coin from the exchange using a /reserves/$RESERVE_PUB/batch-withdraw
* request. This API is typically used by a merchant to withdraw a tip
* where the blinding factor is unknown to the merchant.
*
* 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 exchange the exchange handle; the exchange must be ready to operate
* @param pds array of planchet details of the planchet to withdraw
* @param pds_length number of entries in the @a pds array
* @param reserve_priv private key of the reserve to withdraw from
* @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 exchange).
* In this case, the callback is not called.
*/
struct TALER_EXCHANGE_BatchWithdraw2Handle *
TALER_EXCHANGE_batch_withdraw2 (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const struct TALER_PlanchetDetail *pds,
unsigned int pds_length,
TALER_EXCHANGE_BatchWithdraw2Callback res_cb,
void *res_cb_cls);
/**
* Cancel a batch withdraw request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param wh the withdraw handle
*/
void
TALER_EXCHANGE_batch_withdraw2_cancel (
struct TALER_EXCHANGE_BatchWithdraw2Handle *wh);
/* ********************* /refresh/melt+reveal ***************************** */
/**
* Information needed to 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 we only melt one coin at a time.
*/
struct TALER_EXCHANGE_RefreshData
{
/**
* private key of the coin to melt
*/
struct TALER_CoinSpendPrivateKeyP melt_priv;
/*
* age commitment and proof and its hash that went into the original coin,
* might be NULL.
*/
const struct TALER_AgeCommitmentProof *melt_age_commitment_proof;
const struct TALER_AgeCommitmentHash *melt_h_age_commitment;
/**
* amount specifying how much the coin will contribute to the melt
* (including fee)
*/
struct TALER_Amount melt_amount;
/**
* signatures affirming the validity of the public keys corresponding to the
* @e melt_priv private key
*/
struct TALER_DenominationSignature melt_sig;
/**
* denomination key information record corresponding to the @e melt_sig
* validity of the keys
*/
struct TALER_EXCHANGE_DenomPublicKey melt_pk;
/**
* array of @e pks_len denominations of fresh coins to create
*/
const struct TALER_EXCHANGE_DenomPublicKey *fresh_pks;
/**
* length of the @e pks array
*/
unsigned int fresh_pks_len;
};
/* ********************* /coins/$COIN_PUB/melt ***************************** */
/**
* @brief A /coins/$COIN_PUB/melt Handle
*/
struct TALER_EXCHANGE_MeltHandle;
/**
* Information we obtain per coin during melting.
*/
struct TALER_EXCHANGE_MeltBlindingDetail
{
/**
* Exchange values contributed to the refresh operation
*/
struct TALER_ExchangeWithdrawValues alg_value;
};
/**
* Response returned to a /melt request.
*/
struct TALER_EXCHANGE_MeltResponse
{
/**
* Full HTTP response details.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Parsed response details, variant depending on the
* @e hr.http_status.
*/
union
{
/**
* Results for status #MHD_HTTP_OK.
*/
struct
{
/**
* Information returned per coin.
*/
const struct TALER_EXCHANGE_MeltBlindingDetail *mbds;
/**
* Key used by the exchange to sign the response.
*/
struct TALER_ExchangePublicKeyP sign_key;
/**
* Length of the @a mbds array with the exchange values
* and blinding keys we are using.
*/
unsigned int num_mbds;
/**
* Gamma value chosen by the exchange.
*/
uint32_t noreveal_index;
} success;
} details;
};
/**
* Callbacks of this type are used to notify the application about the result
* of the /coins/$COIN_PUB/melt stage. If successful, the @a noreveal_index
* should be committed to disk prior to proceeding
* #TALER_EXCHANGE_refreshes_reveal().
*
* @param cls closure
* @param mr response details
*/
typedef void
(*TALER_EXCHANGE_MeltCallback) (
void *cls,
const struct TALER_EXCHANGE_MeltResponse *mr);
/**
* Submit a melt request to the exchange and get the exchange's
* response.
*
* This API is typically used by a wallet. Note that to ensure that
* no money is lost in case of hardware failures, the provided
* argument @a rd should be committed to persistent storage
* prior to calling this function.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param rms the fresh secret that defines the refresh operation
* @param rd the refresh data specifying the characteristics of the operation
* @param melt_cb the callback to call with the result
* @param melt_cb_cls closure for @a melt_cb
* @return a handle for this request; NULL if the argument was invalid.
* In this case, neither callback will be called.
*/
struct TALER_EXCHANGE_MeltHandle *
TALER_EXCHANGE_melt (struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_RefreshMasterSecretP *rms,
const struct TALER_EXCHANGE_RefreshData *rd,
TALER_EXCHANGE_MeltCallback melt_cb,
void *melt_cb_cls);
/**
* Cancel a melt request. This function cannot be used
* on a request handle if the callback was already invoked.
*
* @param mh the melt handle
*/
void
TALER_EXCHANGE_melt_cancel (struct TALER_EXCHANGE_MeltHandle *mh);
/* ********************* /refreshes/$RCH/reveal ***************************** */
/**
* Information about a coin obtained via /refreshes/$RCH/reveal.
*/
struct TALER_EXCHANGE_RevealedCoinInfo
{
/**
* Private key of the coin.
*/
struct TALER_CoinSpendPrivateKeyP coin_priv;
/**
* Master secret of this coin.
*/
struct TALER_PlanchetMasterSecretP ps;
/**
* Age commitment and its hash of the coin, might be NULL.
*/
struct TALER_AgeCommitmentProof *age_commitment_proof;
struct TALER_AgeCommitmentHash *h_age_commitment;
/**
* Blinding keys used to blind the fresh coin.
*/
union TALER_DenominationBlindingKeyP bks;
/**
* Signature affirming the validity of the coin.
*/
struct TALER_DenominationSignature sig;
};
/**
* Result of a /refreshes/$RCH/reveal request.
*/
struct TALER_EXCHANGE_RevealResult
{
/**
* HTTP status.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Parsed response details, variant depending on the
* @e hr.http_status.
*/
union
{
/**
* Results for status #MHD_HTTP_OK.
*/
struct
{
/**
* Array of @e num_coins values about the coins obtained via the refresh
* operation. The array give the coins in the same order (and should
* have the same length) in which the original melt request specified the
* respective denomination keys.
*/
const struct TALER_EXCHANGE_RevealedCoinInfo *coins;
/**
* Number of coins returned.
*/
unsigned int num_coins;
} success;
} details;
};
/**
* Callbacks of this type are used to return the final result of
* submitting a refresh request to a exchange. If the operation was
* successful, this function returns the signatures over the coins
* that were remelted.
*
* @param cls closure
* @param rr result of the reveal operation
*/
typedef void
(*TALER_EXCHANGE_RefreshesRevealCallback)(
void *cls,
const struct TALER_EXCHANGE_RevealResult *rr);
/**
* @brief A /refreshes/$RCH/reveal Handle
*/
struct TALER_EXCHANGE_RefreshesRevealHandle;
/**
* Submit a /refreshes/$RCH/reval request to the exchange and get the exchange'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 exchange the exchange handle; the exchange must be ready to operate
* @param rms the fresh secret that defines the refresh operation
* @param rd the refresh data that characterizes the refresh operation
* @param num_coins number of fresh coins to be created, length of the @a exchange_vals array, must match value in @a rd
* @param alg_values array @a num_coins of exchange values contributed to the refresh operation
* @param noreveal_index response from the exchange to the
* #TALER_EXCHANGE_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_EXCHANGE_RefreshesRevealHandle *
TALER_EXCHANGE_refreshes_reveal (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_RefreshMasterSecretP *rms,
const struct TALER_EXCHANGE_RefreshData *rd,
unsigned int num_coins,
const struct TALER_ExchangeWithdrawValues *alg_values,
uint32_t noreveal_index,
TALER_EXCHANGE_RefreshesRevealCallback 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_EXCHANGE_refreshes_reveal_cancel (
struct TALER_EXCHANGE_RefreshesRevealHandle *rrh);
/* ********************* /coins/$COIN_PUB/link ***************************** */
/**
* @brief A /coins/$COIN_PUB/link Handle
*/
struct TALER_EXCHANGE_LinkHandle;
/**
* Information about a coin obtained via /link.
*/
struct TALER_EXCHANGE_LinkedCoinInfo
{
/**
* Private key of the coin.
*/
struct TALER_CoinSpendPrivateKeyP coin_priv;
/**
* Age commitment and its hash, if applicable. Might be NULL.
*/
struct TALER_AgeCommitmentProof *age_commitment_proof;
struct TALER_AgeCommitmentHash *h_age_commitment;
/**
* Master secret of this coin.
*/
struct TALER_PlanchetMasterSecretP ps;
/**
* Signature affirming the validity of the coin.
*/
struct TALER_DenominationSignature sig;
/**
* Denomination public key of the coin.
*/
struct TALER_DenominationPublicKey pub;
};
/**
* Result of a /link request.
*/
struct TALER_EXCHANGE_LinkResult
{
/**
* HTTP status.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Parsed response details, variant depending on the
* @e hr.http_status.
*/
union
{
/**
* Results for status #MHD_HTTP_OK.
*/
struct
{
/**
* Array of @e num_coins values about the
* coins obtained via linkage.
*/
const struct TALER_EXCHANGE_LinkedCoinInfo *coins;
/**
* Number of coins returned.
*/
unsigned int num_coins;
} success;
} details;
};
/**
* Callbacks of this type are used to return the final result of submitting a
* /coins/$COIN_PUB/link request to a exchange. If the operation was
* successful, this function returns the signatures over the coins that were
* created when the original coin was melted.
*
* @param cls closure
* @param lr result of the /link operation
*/
typedef void
(*TALER_EXCHANGE_LinkCallback) (
void *cls,
const struct TALER_EXCHANGE_LinkResult *lr);
/**
* Submit a link request to the exchange and get the exchange's response.
*
* This API is typically not used by anyone, it is more a threat against those
* trying to receive a funds transfer by abusing the refresh protocol.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param coin_priv private key to request link data for
* @param age_commitment_proof age commitment to the corresponding coin, might be NULL
* @param link_cb the callback to call with the useful result of the
* refresh operation the @a coin_priv was involved in (if any)
* @param link_cb_cls closure for @a link_cb
* @return a handle for this request
*/
struct TALER_EXCHANGE_LinkHandle *
TALER_EXCHANGE_link (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_CoinSpendPrivateKeyP *coin_priv,
const struct TALER_AgeCommitmentProof *age_commitment_proof,
TALER_EXCHANGE_LinkCallback link_cb,
void *link_cb_cls);
/**
* Cancel a link request. This function cannot be used
* on a request handle if the callback was already invoked.
*
* @param lh the link handle
*/
void
TALER_EXCHANGE_link_cancel (struct TALER_EXCHANGE_LinkHandle *lh);
/* ********************* /transfers/$WTID *********************** */
/**
* @brief A /transfers/$WTID Handle
*/
struct TALER_EXCHANGE_TransfersGetHandle;
/**
* Information the exchange returns per wire transfer.
*/
struct TALER_EXCHANGE_TransferData
{
/**
* exchange key used to sign
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* exchange signature over the transfer data
*/
struct TALER_ExchangeSignatureP exchange_sig;
/**
* hash of the payto:// URI the transfer went to
*/
struct TALER_PaytoHashP h_payto;
/**
* time when the exchange claims to have performed the wire transfer
*/
struct GNUNET_TIME_Timestamp execution_time;
/**
* Actual amount of the wire transfer, excluding the wire fee.
*/
struct TALER_Amount total_amount;
/**
* wire fee that was charged by the exchange
*/
struct TALER_Amount wire_fee;
/**
* length of the @e details array
*/
unsigned int details_length;
/**
* array with details about the combined transactions
*/
const struct TALER_TrackTransferDetails *details;
};
/**
* Function called with detailed wire transfer data, including all
* of the coin transactions that were combined into the wire transfer.
*
* @param cls closure
* @param hr HTTP response data
* @param ta transfer data, (set only if @a http_status is #MHD_HTTP_OK, otherwise NULL)
*/
typedef void
(*TALER_EXCHANGE_TransfersGetCallback)(
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr,
const struct TALER_EXCHANGE_TransferData *ta);
/**
* Query the exchange about which transactions were combined
* to create a wire transfer.
*
* @param exchange exchange to query
* @param wtid raw wire transfer identifier to get information about
* @param cb callback to call
* @param cb_cls closure for @a cb
* @return handle to cancel operation
*/
struct TALER_EXCHANGE_TransfersGetHandle *
TALER_EXCHANGE_transfers_get (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_WireTransferIdentifierRawP *wtid,
TALER_EXCHANGE_TransfersGetCallback cb,
void *cb_cls);
/**
* Cancel wire deposits request. This function cannot be used on a request
* handle if a response is already served for it.
*
* @param wdh the wire deposits request handle
*/
void
TALER_EXCHANGE_transfers_get_cancel (
struct TALER_EXCHANGE_TransfersGetHandle *wdh);
/* ********************* GET /deposits/ *********************** */
/**
* @brief A /deposits/ GET Handle
*/
struct TALER_EXCHANGE_DepositGetHandle;
/**
* Data returned for a successful GET /deposits/ request.
*/
struct TALER_EXCHANGE_GetDepositResponse
{
/**
* HTTP response data.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details about the response.
*/
union
{
/**
* Response if the status was #MHD_HTTP_OK
*/
struct TALER_EXCHANGE_DepositData
{
/**
* exchange key used to sign, all zeros if exchange did not
* yet execute the transaction
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* signature from the exchange over the deposit data, all zeros if exchange did not
* yet execute the transaction
*/
struct TALER_ExchangeSignatureP exchange_sig;
/**
* wire transfer identifier used by the exchange, all zeros if exchange did not
* yet execute the transaction
*/
struct TALER_WireTransferIdentifierRawP wtid;
/**
* actual execution time for the wire transfer
*/
struct GNUNET_TIME_Timestamp execution_time;
/**
* contribution to the total amount by this coin, all zeros if exchange did not
* yet execute the transaction
*/
struct TALER_Amount coin_contribution;
} success;
/**
* Response if the status was #MHD_HTTP_ACCEPTED
*/
struct
{
/**
* planned execution time for the wire transfer
*/
struct GNUNET_TIME_Timestamp execution_time;
/**
* KYC legitimization requirement that the merchant should use to check
* for its KYC status.
*/
uint64_t requirement_row;
/**
* Set to 'true' if the KYC check is already finished and
* the exchange is merely waiting for the @e execution_time.
*/
bool kyc_ok;
} accepted;
} details;
};
/**
* Function called with detailed wire transfer data.
*
* @param cls closure
* @param dr details about the deposit response
*/
typedef void
(*TALER_EXCHANGE_DepositGetCallback)(
void *cls,
const struct TALER_EXCHANGE_GetDepositResponse *dr);
/**
* Obtain the wire transfer details for a given transaction. Tells the client
* which aggregate wire transfer the deposit operation identified by @a coin_pub,
* @a merchant_priv and @a h_contract_terms contributed to.
*
* @param exchange the exchange to query
* @param merchant_priv the merchant's private key
* @param h_wire hash of merchant's wire transfer details
* @param h_contract_terms hash of the proposal data
* @param coin_pub public key of the coin
* @param cb function to call with the result
* @param cb_cls closure for @a cb
* @return handle to abort request
*/
struct TALER_EXCHANGE_DepositGetHandle *
TALER_EXCHANGE_deposits_get (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_MerchantPrivateKeyP *merchant_priv,
const struct TALER_MerchantWireHashP *h_wire,
const struct TALER_PrivateContractHashP *h_contract_terms,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
TALER_EXCHANGE_DepositGetCallback cb,
void *cb_cls);
/**
* Cancel deposit wtid request. This function cannot be used on a request
* handle if a response is already served for it.
*
* @param dwh the wire deposits request handle
*/
void
TALER_EXCHANGE_deposits_get_cancel (
struct TALER_EXCHANGE_DepositGetHandle *dwh);
/**
* Convenience function. Verifies a coin's transaction history as
* returned by the exchange.
*
* @param dk fee structure for the coin
* @param coin_pub public key of the coin
* @param history history of the coin in json encoding
* @param[out] total how much of the coin has been spent according to @a history
* @return #GNUNET_OK if @a history is valid, #GNUNET_SYSERR if not
*/
enum GNUNET_GenericReturnValue
TALER_EXCHANGE_verify_coin_history (
const struct TALER_EXCHANGE_DenomPublicKey *dk,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
json_t *history,
struct TALER_Amount *total);
/**
* Parse history given in JSON format and return it in binary
* format.
*
* @param exchange connection to the exchange we can use
* @param history JSON array with the history
* @param reserve_pub public key of the reserve to inspect
* @param currency currency we expect the balance to be in
* @param[out] total_in set to value of credits to reserve
* @param[out] total_out set to value of debits from reserve
* @param history_length number of entries in @a history
* @param[out] rhistory array of length @a history_length, set to the
* parsed history entries
* @return #GNUNET_OK if history was valid and @a rhistory and @a balance
* were set,
* #GNUNET_SYSERR if there was a protocol violation in @a history
*/
enum GNUNET_GenericReturnValue
TALER_EXCHANGE_parse_reserve_history (
struct TALER_EXCHANGE_Handle *exchange,
const json_t *history,
const struct TALER_ReservePublicKeyP *reserve_pub,
const char *currency,
struct TALER_Amount *total_in,
struct TALER_Amount *total_out,
unsigned int history_length,
struct TALER_EXCHANGE_ReserveHistoryEntry *rhistory);
/**
* Free memory (potentially) allocated by #TALER_EXCHANGE_parse_reserve_history().
*
* @param rhistory result to free
* @param len number of entries in @a rhistory
*/
void
TALER_EXCHANGE_free_reserve_history (
struct TALER_EXCHANGE_ReserveHistoryEntry *rhistory,
unsigned int len);
/* ********************* /recoup *********************** */
/**
* @brief A /recoup Handle
*/
struct TALER_EXCHANGE_RecoupHandle;
/**
* Callbacks of this type are used to return the final result of
* submitting a recoup request to a exchange. If the operation was
* successful, this function returns the @a reserve_pub of the
* reserve that was credited.
*
* @param cls closure
* @param hr HTTP response data
* @param reserve_pub public key of the reserve receiving the recoup
*/
typedef void
(*TALER_EXCHANGE_RecoupResultCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr,
const struct TALER_ReservePublicKeyP *reserve_pub);
/**
* Ask the exchange to pay back a coin due to the exchange triggering
* the emergency recoup protocol for a given denomination. The value
* of the coin will be refunded to the original customer (without fees).
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param pk kind of coin to pay back
* @param denom_sig signature over the coin by the exchange using @a pk
* @param exchange_vals contribution from the exchange on the withdraw
* @param ps secret internals of the original planchet
* @param recoup_cb the callback to call when the final result for this request is available
* @param recoup_cb_cls closure for @a recoup_cb
* @return NULL
* if the inputs are invalid (i.e. denomination key not with this exchange).
* In this case, the callback is not called.
*/
struct TALER_EXCHANGE_RecoupHandle *
TALER_EXCHANGE_recoup (struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_EXCHANGE_DenomPublicKey *pk,
const struct TALER_DenominationSignature *denom_sig,
const struct TALER_ExchangeWithdrawValues *exchange_vals,
const struct TALER_PlanchetMasterSecretP *ps,
TALER_EXCHANGE_RecoupResultCallback recoup_cb,
void *recoup_cb_cls);
/**
* Cancel a recoup request. This function cannot be used on a
* request handle if the callback was already invoked.
*
* @param ph the recoup handle
*/
void
TALER_EXCHANGE_recoup_cancel (struct TALER_EXCHANGE_RecoupHandle *ph);
/* ********************* /recoup-refresh *********************** */
/**
* @brief A /recoup-refresh Handle
*/
struct TALER_EXCHANGE_RecoupRefreshHandle;
/**
* Callbacks of this type are used to return the final result of
* submitting a recoup-refresh request to a exchange.
*
* @param cls closure
* @param hr HTTP response data
* @param old_coin_pub public key of the dirty coin that was credited
*/
typedef void
(*TALER_EXCHANGE_RecoupRefreshResultCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr,
const struct TALER_CoinSpendPublicKeyP *old_coin_pub);
/**
* Ask the exchange to pay back a coin due to the exchange triggering
* the emergency recoup protocol for a given denomination. The value
* of the coin will be refunded to the original coin that the
* revoked coin was refreshed from. The original coin is then
* considered a zombie.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param pk kind of coin to pay back
* @param denom_sig signature over the coin by the exchange using @a pk
* @param exchange_vals contribution from the exchange on the withdraw
* @param rms melt secret of the refreshing operation
* @param ps coin-specific secrets derived for this coin during the refreshing operation
* @param idx index of the fresh coin in the refresh operation that is now being recouped
* @param recoup_cb the callback to call when the final result for this request is available
* @param recoup_cb_cls closure for @a recoup_cb
* @return NULL
* if the inputs are invalid (i.e. denomination key not with this exchange).
* In this case, the callback is not called.
*/
struct TALER_EXCHANGE_RecoupRefreshHandle *
TALER_EXCHANGE_recoup_refresh (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_EXCHANGE_DenomPublicKey *pk,
const struct TALER_DenominationSignature *denom_sig,
const struct TALER_ExchangeWithdrawValues *exchange_vals,
const struct TALER_RefreshMasterSecretP *rms,
const struct TALER_PlanchetMasterSecretP *ps,
unsigned int idx,
TALER_EXCHANGE_RecoupRefreshResultCallback recoup_cb,
void *recoup_cb_cls);
/**
* Cancel a recoup-refresh request. This function cannot be used on a request
* handle if the callback was already invoked.
*
* @param ph the recoup handle
*/
void
TALER_EXCHANGE_recoup_refresh_cancel (
struct TALER_EXCHANGE_RecoupRefreshHandle *ph);
/* ********************* /kyc* *********************** */
/**
* Handle for a ``/kyc-check`` operation.
*/
struct TALER_EXCHANGE_KycCheckHandle;
/**
* KYC status response details.
*/
struct TALER_EXCHANGE_KycStatus
{
/**
* HTTP status code returned by the exchange.
*/
unsigned int http_status;
/**
* Taler error code, if any.
*/
enum TALER_ErrorCode ec;
union
{
/**
* KYC is OK, affirmation returned by the exchange.
*/
struct
{
/**
* Details about which KYC check(s) were passed.
*/
const json_t *kyc_details;
/**
* Time of the affirmation.
*/
struct GNUNET_TIME_Timestamp timestamp;
/**
* The signing public key used for @e exchange_sig.
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* Signature of purpose
* #TALER_SIGNATURE_EXCHANGE_ACCOUNT_SETUP_SUCCESS affirming
* the successful KYC process.
*/
struct TALER_ExchangeSignatureP exchange_sig;
} success;
struct
{
/**
* URL the user should open in a browser if
* the KYC process is to be run. Returned if
* @e http_status is #MHD_HTTP_ACCEPTED.
*/
const char *kyc_url;
} accepted;
} details;
};
/**
* Function called with the result of a KYC check.
*
* @param cls closure
* @param ks the account's KYC status details
*/
typedef void
(*TALER_EXCHANGE_KycStatusCallback)(
void *cls,
const struct TALER_EXCHANGE_KycStatus *ks);
/**
* Run interaction with exchange to check KYC status
* of a merchant.
*
* @param eh exchange handle to use
* @param requirement_row number identifying the KYC requirement
* @param h_payto hash of the payto:// URI at @a payment_target
* @param ut type of the entity performing the KYC check
* @param timeout how long to wait for a positive KYC status
* @param cb function to call with the result
* @param cb_cls closure for @a cb
* @return NULL on error
*/
struct TALER_EXCHANGE_KycCheckHandle *
TALER_EXCHANGE_kyc_check (struct TALER_EXCHANGE_Handle *eh,
uint64_t requirement_row,
const struct TALER_PaytoHashP *h_payto,
enum TALER_KYCLOGIC_KycUserType ut,
struct GNUNET_TIME_Relative timeout,
TALER_EXCHANGE_KycStatusCallback cb,
void *cb_cls);
/**
* Cancel KYC check operation.
*
* @param kyc handle for operation to cancel
*/
void
TALER_EXCHANGE_kyc_check_cancel (struct TALER_EXCHANGE_KycCheckHandle *kyc);
/**
* KYC proof response details.
*/
struct TALER_EXCHANGE_KycProofResponse
{
/**
* HTTP status code returned by the exchange.
*/
unsigned int http_status;
union
{
/**
* KYC is OK, affirmation returned by the exchange.
*/
struct
{
/**
* Where to redirect the client next.
*/
const char *redirect_url;
} found;
} details;
};
/**
* Function called with the result of a KYC check.
*
* @param cls closure
* @param kpr the account's KYC status details
*/
typedef void
(*TALER_EXCHANGE_KycProofCallback)(
void *cls,
const struct TALER_EXCHANGE_KycProofResponse *kpr);
/**
* Handle for a /kyc-proof operation.
*/
struct TALER_EXCHANGE_KycProofHandle;
/**
* Run interaction with exchange to provide proof of KYC status.
*
* @param eh exchange handle to use
* @param h_payto hash of payto URI identifying the target account
* @param logic name of the KYC logic to run
* @param args additional args to pass, can be NULL
* or a string to append to the URL. Must
* then begin with '/' or '?'.
* @param cb function to call with the result
* @param cb_cls closure for @a cb
* @return NULL on error
*/
struct TALER_EXCHANGE_KycProofHandle *
TALER_EXCHANGE_kyc_proof (struct TALER_EXCHANGE_Handle *eh,
const struct TALER_PaytoHashP *h_payto,
const char *logic,
const char *args,
TALER_EXCHANGE_KycProofCallback cb,
void *cb_cls);
/**
* Cancel KYC proof operation.
*
* @param kph handle for operation to cancel
*/
void
TALER_EXCHANGE_kyc_proof_cancel (struct TALER_EXCHANGE_KycProofHandle *kph);
/**
* Handle for a ``/kyc-wallet`` operation.
*/
struct TALER_EXCHANGE_KycWalletHandle;
/**
* KYC status response details.
*/
struct TALER_EXCHANGE_WalletKycResponse
{
/**
* HTTP status code returned by the exchange.
*/
unsigned int http_status;
/**
* Taler error code, if any.
*/
enum TALER_ErrorCode ec;
/**
* Variants depending on @e http_status.
*/
union
{
/**
* In case @e http_status is #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS.
*/
struct
{
/**
* Wallet's KYC requirement row.
*/
uint64_t requirement_row;
/**
* Hash of the payto-URI identifying the wallet to KYC.
*/
struct TALER_PaytoHashP h_payto;
} unavailable_for_legal_reasons;
} details;
};
/**
* Function called with the result for a wallet looking
* up its KYC payment target.
*
* @param cls closure
* @param ks the wallets KYC payment target details
*/
typedef void
(*TALER_EXCHANGE_KycWalletCallback)(
void *cls,
const struct TALER_EXCHANGE_WalletKycResponse *ks);
/**
* Run interaction with exchange to find out the wallet's KYC
* identifier.
*
* @param eh exchange handle to use
* @param reserve_priv wallet private key to check
* @param balance balance (or balance threshold) crossed by the wallet
* @param cb function to call with the result
* @param cb_cls closure for @a cb
* @return NULL on error
*/
struct TALER_EXCHANGE_KycWalletHandle *
TALER_EXCHANGE_kyc_wallet (struct TALER_EXCHANGE_Handle *eh,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const struct TALER_Amount *balance,
TALER_EXCHANGE_KycWalletCallback cb,
void *cb_cls);
/**
* Cancel KYC wallet operation
*
* @param kwh handle for operation to cancel
*/
void
TALER_EXCHANGE_kyc_wallet_cancel (struct TALER_EXCHANGE_KycWalletHandle *kwh);
/* ********************* /management *********************** */
/**
* @brief Future Exchange's signature key
*/
struct TALER_EXCHANGE_FutureSigningPublicKey
{
/**
* The signing public key
*/
struct TALER_ExchangePublicKeyP key;
/**
* Signature by the security module affirming it owns this key.
*/
struct TALER_SecurityModuleSignatureP signkey_secmod_sig;
/**
* Validity start time
*/
struct GNUNET_TIME_Timestamp valid_from;
/**
* Validity expiration time (how long the exchange may use it).
*/
struct GNUNET_TIME_Timestamp valid_until;
/**
* Validity expiration time for legal disputes.
*/
struct GNUNET_TIME_Timestamp valid_legal;
};
/**
* @brief Public information about a future exchange's denomination key
*/
struct TALER_EXCHANGE_FutureDenomPublicKey
{
/**
* The public key
*/
struct TALER_DenominationPublicKey key;
/**
* Signature by the security module affirming it owns this key.
*/
struct TALER_SecurityModuleSignatureP denom_secmod_sig;
/**
* Timestamp indicating when the denomination key becomes valid
*/
struct GNUNET_TIME_Timestamp valid_from;
/**
* Timestamp indicating when the denomination key can’t be used anymore to
* withdraw new coins.
*/
struct GNUNET_TIME_Timestamp withdraw_valid_until;
/**
* Timestamp indicating when coins of this denomination become invalid.
*/
struct GNUNET_TIME_Timestamp expire_deposit;
/**
* When do signatures with this denomination key become invalid?
* After this point, these signatures cannot be used in (legal)
* disputes anymore, as the Exchange is then allowed to destroy its side
* of the evidence. @e expire_legal is expected to be significantly
* larger than @e expire_deposit (by a year or more).
*/
struct GNUNET_TIME_Timestamp expire_legal;
/**
* 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;
/**
* The applicable fee to refund a coin of this denomination
*/
struct TALER_Amount fee_refund;
};
/**
* @brief Information about future keys from the exchange.
*/
struct TALER_EXCHANGE_FutureKeys
{
/**
* Array of the exchange's online signing keys.
*/
struct TALER_EXCHANGE_FutureSigningPublicKey *sign_keys;
/**
* Array of the exchange's denomination keys.
*/
struct TALER_EXCHANGE_FutureDenomPublicKey *denom_keys;
/**
* Public key of the signkey security module.
*/
struct TALER_SecurityModulePublicKeyP signkey_secmod_public_key;
/**
* Public key of the RSA denomination security module.
*/
struct TALER_SecurityModulePublicKeyP denom_secmod_public_key;
/**
* Public key of the CS denomination security module.
*/
struct TALER_SecurityModulePublicKeyP denom_secmod_cs_public_key;
/**
* Offline master public key used by this exchange.
*/
struct TALER_MasterPublicKeyP master_pub;
/**
* Length of the @e sign_keys array (number of valid entries).
*/
unsigned int num_sign_keys;
/**
* Length of the @e denom_keys array.
*/
unsigned int num_denom_keys;
};
/**
* Function called with information about future keys.
*
* @param cls closure
* @param hr HTTP response data
* @param keys information about the various keys used
* by the exchange, NULL if /management/keys failed
*/
typedef void
(*TALER_EXCHANGE_ManagementGetKeysCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr,
const struct TALER_EXCHANGE_FutureKeys *keys);
/**
* @brief Handle for a GET /management/keys request.
*/
struct TALER_EXCHANGE_ManagementGetKeysHandle;
/**
* Request future keys from the exchange. The obtained information will be
* passed to the @a cb.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param cb function to call with the exchange's future keys result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementGetKeysHandle *
TALER_EXCHANGE_get_management_keys (struct GNUNET_CURL_Context *ctx,
const char *url,
TALER_EXCHANGE_ManagementGetKeysCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_get_management_keys() operation.
*
* @param gh handle of the operation to cancel
*/
void
TALER_EXCHANGE_get_management_keys_cancel (
struct TALER_EXCHANGE_ManagementGetKeysHandle *gh);
/**
* @brief Public information about a signature on an exchange's online signing key
*/
struct TALER_EXCHANGE_SigningKeySignature
{
/**
* The signing public key
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* Signature over this signing key by the exchange's master signature.
* Of purpose #TALER_SIGNATURE_MASTER_SIGNING_KEY_VALIDITY
*/
struct TALER_MasterSignatureP master_sig;
};
/**
* @brief Public information about a signature on an exchange's denomination key
*/
struct TALER_EXCHANGE_DenominationKeySignature
{
/**
* The hash of the denomination's public key
*/
struct TALER_DenominationHashP h_denom_pub;
/**
* Signature over this denomination key by the exchange's master signature.
* Of purpose #TALER_SIGNATURE_MASTER_DENOMINATION_KEY_VALIDITY.
*/
struct TALER_MasterSignatureP master_sig;
};
/**
* Information needed for a POST /management/keys operation.
*/
struct TALER_EXCHANGE_ManagementPostKeysData
{
/**
* Array of the master signatures for the exchange's online signing keys.
*/
struct TALER_EXCHANGE_SigningKeySignature *sign_sigs;
/**
* Array of the master signatures for the exchange's denomination keys.
*/
struct TALER_EXCHANGE_DenominationKeySignature *denom_sigs;
/**
* Length of the @e sign_keys array (number of valid entries).
*/
unsigned int num_sign_sigs;
/**
* Length of the @e denom_keys array.
*/
unsigned int num_denom_sigs;
};
/**
* Function called with information about the post keys operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementPostKeysCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/keys request.
*/
struct TALER_EXCHANGE_ManagementPostKeysHandle;
/**
* Provide master-key signatures to the exchange.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param pkd signature data to POST
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementPostKeysHandle *
TALER_EXCHANGE_post_management_keys (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct TALER_EXCHANGE_ManagementPostKeysData *pkd,
TALER_EXCHANGE_ManagementPostKeysCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_post_management_keys() operation.
*
* @param ph handle of the operation to cancel
*/
void
TALER_EXCHANGE_post_management_keys_cancel (
struct TALER_EXCHANGE_ManagementPostKeysHandle *ph);
/**
* Information needed for a POST /management/extensions operation.
*
* It represents the interface ExchangeKeysResponse as defined in
* https://docs.taler.net/design-documents/006-extensions.html#exchange
*/
struct TALER_EXCHANGE_ManagementPostExtensionsData
{
json_t *extensions;
struct TALER_MasterSignatureP extensions_sig;
};
/**
* Function called with information about the post extensions operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementPostExtensionsCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/extensions request.
*/
struct TALER_EXCHANGE_ManagementPostExtensionsHandle;
/**
* Uploads the configurations of enabled extensions to the exchange, signed
* with the master key.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param ped signature data to POST
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementPostExtensionsHandle *
TALER_EXCHANGE_management_post_extensions (
struct GNUNET_CURL_Context *ctx,
const char *url,
struct TALER_EXCHANGE_ManagementPostExtensionsData *ped,
TALER_EXCHANGE_ManagementPostExtensionsCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_post_extensions() operation.
*
* @param ph handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_post_extensions_cancel (
struct TALER_EXCHANGE_ManagementPostExtensionsHandle *ph);
/**
* Function called with information about the drain profits result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementDrainProfitsCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/drain request.
*/
struct TALER_EXCHANGE_ManagementDrainProfitsHandle;
/**
* Uploads the drain profits request.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param wtid wire transfer identifier to use
* @param amount total to transfer
* @param date when was the request created
* @param account_section configuration section identifying account to debit
* @param payto_uri RFC 8905 URI of the account to credit
* @param master_sig signature affirming the operation
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementDrainProfitsHandle *
TALER_EXCHANGE_management_drain_profits (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct TALER_WireTransferIdentifierRawP *wtid,
const struct TALER_Amount *amount,
struct GNUNET_TIME_Timestamp date,
const char *account_section,
const char *payto_uri,
const struct TALER_MasterSignatureP *master_sig,
TALER_EXCHANGE_ManagementDrainProfitsCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_drain_profits() operation.
*
* @param dp handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_drain_profits_cancel (
struct TALER_EXCHANGE_ManagementDrainProfitsHandle *dp);
/**
* Function called with information about the post revocation operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementRevokeDenominationKeyCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/denominations/$H_DENOM_PUB/revoke request.
*/
struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle;
/**
* Inform the exchange that a denomination key was revoked.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param h_denom_pub hash of the denomination public key that was revoked
* @param master_sig signature affirming the revocation
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *
TALER_EXCHANGE_management_revoke_denomination_key (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct TALER_DenominationHashP *h_denom_pub,
const struct TALER_MasterSignatureP *master_sig,
TALER_EXCHANGE_ManagementRevokeDenominationKeyCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_revoke_denomination_key() operation.
*
* @param rh handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_revoke_denomination_key_cancel (
struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *rh);
/**
* Function called with information about the post revocation operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementRevokeSigningKeyCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/signkeys/$H_DENOM_PUB/revoke request.
*/
struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle;
/**
* Inform the exchange that a signing key was revoked.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param exchange_pub the public signing key that was revoked
* @param master_sig signature affirming the revocation
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *
TALER_EXCHANGE_management_revoke_signing_key (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct TALER_ExchangePublicKeyP *exchange_pub,
const struct TALER_MasterSignatureP *master_sig,
TALER_EXCHANGE_ManagementRevokeSigningKeyCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_revoke_signing_key() operation.
*
* @param rh handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_revoke_signing_key_cancel (
struct TALER_EXCHANGE_ManagementRevokeSigningKeyHandle *rh);
/**
* Function called with information about the auditor setup operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementAuditorEnableCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/auditors request.
*/
struct TALER_EXCHANGE_ManagementAuditorEnableHandle;
/**
* Inform the exchange that an auditor should be enable or enabled.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param auditor_pub the public signing key of the auditor
* @param auditor_url base URL of the auditor
* @param auditor_name human readable name for the auditor
* @param validity_start when was this decided?
* @param master_sig signature affirming the auditor addition
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementAuditorEnableHandle *
TALER_EXCHANGE_management_enable_auditor (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct TALER_AuditorPublicKeyP *auditor_pub,
const char *auditor_url,
const char *auditor_name,
struct GNUNET_TIME_Timestamp validity_start,
const struct TALER_MasterSignatureP *master_sig,
TALER_EXCHANGE_ManagementAuditorEnableCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_enable_auditor() operation.
*
* @param ah handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_enable_auditor_cancel (
struct TALER_EXCHANGE_ManagementAuditorEnableHandle *ah);
/**
* Function called with information about the auditor disable operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementAuditorDisableCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/auditors/$AUDITOR_PUB/disable request.
*/
struct TALER_EXCHANGE_ManagementAuditorDisableHandle;
/**
* Inform the exchange that an auditor should be disabled.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param auditor_pub the public signing key of the auditor
* @param validity_end when was this decided?
* @param master_sig signature affirming the auditor addition
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementAuditorDisableHandle *
TALER_EXCHANGE_management_disable_auditor (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct TALER_AuditorPublicKeyP *auditor_pub,
struct GNUNET_TIME_Timestamp validity_end,
const struct TALER_MasterSignatureP *master_sig,
TALER_EXCHANGE_ManagementAuditorDisableCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_disable_auditor() operation.
*
* @param ah handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_disable_auditor_cancel (
struct TALER_EXCHANGE_ManagementAuditorDisableHandle *ah);
/**
* Function called with information about the wire enable operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementWireEnableCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/wire request.
*/
struct TALER_EXCHANGE_ManagementWireEnableHandle;
/**
* Inform the exchange that a wire account should be enabled.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param payto_uri RFC 8905 URI of the exchange's bank account
* @param validity_start when was this decided?
* @param master_sig1 signature affirming the wire addition
* of purpose #TALER_SIGNATURE_MASTER_ADD_WIRE
* @param master_sig2 signature affirming the validity of the account for clients;
* of purpose #TALER_SIGNATURE_MASTER_WIRE_DETAILS.
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementWireEnableHandle *
TALER_EXCHANGE_management_enable_wire (
struct GNUNET_CURL_Context *ctx,
const char *url,
const char *payto_uri,
struct GNUNET_TIME_Timestamp validity_start,
const struct TALER_MasterSignatureP *master_sig1,
const struct TALER_MasterSignatureP *master_sig2,
TALER_EXCHANGE_ManagementWireEnableCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_enable_wire() operation.
*
* @param wh handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_enable_wire_cancel (
struct TALER_EXCHANGE_ManagementWireEnableHandle *wh);
/**
* Function called with information about the wire disable operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementWireDisableCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/wire/disable request.
*/
struct TALER_EXCHANGE_ManagementWireDisableHandle;
/**
* Inform the exchange that a wire account should be disabled.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param payto_uri RFC 8905 URI of the exchange's bank account
* @param validity_end when was this decided?
* @param master_sig signature affirming the wire addition
* of purpose #TALER_SIGNATURE_MASTER_DEL_WIRE
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementWireDisableHandle *
TALER_EXCHANGE_management_disable_wire (
struct GNUNET_CURL_Context *ctx,
const char *url,
const char *payto_uri,
struct GNUNET_TIME_Timestamp validity_end,
const struct TALER_MasterSignatureP *master_sig,
TALER_EXCHANGE_ManagementWireDisableCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_disable_wire() operation.
*
* @param wh handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_disable_wire_cancel (
struct TALER_EXCHANGE_ManagementWireDisableHandle *wh);
/**
* Function called with information about the wire enable operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementSetWireFeeCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/wire-fees request.
*/
struct TALER_EXCHANGE_ManagementSetWireFeeHandle;
/**
* Inform the exchange about future wire fees.
*
* @param ctx the context
* @param exchange_base_url HTTP base URL for the exchange
* @param wire_method for which wire method are fees provided
* @param validity_start start date for the provided wire fees
* @param validity_end end date for the provided wire fees
* @param fees the wire fees for this time period
* @param master_sig signature affirming the wire fees;
* of purpose #TALER_SIGNATURE_MASTER_WIRE_FEES
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementSetWireFeeHandle *
TALER_EXCHANGE_management_set_wire_fees (
struct GNUNET_CURL_Context *ctx,
const char *exchange_base_url,
const char *wire_method,
struct GNUNET_TIME_Timestamp validity_start,
struct GNUNET_TIME_Timestamp validity_end,
const struct TALER_WireFeeSet *fees,
const struct TALER_MasterSignatureP *master_sig,
TALER_EXCHANGE_ManagementSetWireFeeCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_enable_wire() operation.
*
* @param swfh handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_set_wire_fees_cancel (
struct TALER_EXCHANGE_ManagementSetWireFeeHandle *swfh);
/**
* Function called with information about the global fee setting operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ManagementSetGlobalFeeCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /management/global-fees request.
*/
struct TALER_EXCHANGE_ManagementSetGlobalFeeHandle;
/**
* Inform the exchange about global fees.
*
* @param ctx the context
* @param exchange_base_url HTTP base URL for the exchange
* @param validity_start start date for the provided wire fees
* @param validity_end end date for the provided wire fees
* @param fees the wire fees for this time period
* @param purse_timeout when do purses time out
* @param history_expiration how long are account histories preserved
* @param purse_account_limit how many purses are free per account
* @param master_sig signature affirming the wire fees;
* of purpose #TALER_SIGNATURE_MASTER_GLOBAL_FEES
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ManagementSetGlobalFeeHandle *
TALER_EXCHANGE_management_set_global_fees (
struct GNUNET_CURL_Context *ctx,
const char *exchange_base_url,
struct GNUNET_TIME_Timestamp validity_start,
struct GNUNET_TIME_Timestamp validity_end,
const struct TALER_GlobalFeeSet *fees,
struct GNUNET_TIME_Relative purse_timeout,
struct GNUNET_TIME_Relative history_expiration,
uint32_t purse_account_limit,
const struct TALER_MasterSignatureP *master_sig,
TALER_EXCHANGE_ManagementSetGlobalFeeCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_management_enable_wire() operation.
*
* @param sgfh handle of the operation to cancel
*/
void
TALER_EXCHANGE_management_set_global_fees_cancel (
struct TALER_EXCHANGE_ManagementSetGlobalFeeHandle *sgfh);
/**
* Function called with information about the POST
* /auditor/$AUDITOR_PUB/$H_DENOM_PUB operation result.
*
* @param cls closure
* @param hr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_AuditorAddDenominationCallback) (
void *cls,
const struct TALER_EXCHANGE_HttpResponse *hr);
/**
* @brief Handle for a POST /auditor/$AUDITOR_PUB/$H_DENOM_PUB request.
*/
struct TALER_EXCHANGE_AuditorAddDenominationHandle;
/**
* Provide auditor signatures for a denomination to the exchange.
*
* @param ctx the context
* @param url HTTP base URL for the exchange
* @param h_denom_pub hash of the public key of the denomination
* @param auditor_pub public key of the auditor
* @param auditor_sig signature of the auditor, of
* purpose #TALER_SIGNATURE_AUDITOR_EXCHANGE_KEYS
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_AuditorAddDenominationHandle *
TALER_EXCHANGE_add_auditor_denomination (
struct GNUNET_CURL_Context *ctx,
const char *url,
const struct TALER_DenominationHashP *h_denom_pub,
const struct TALER_AuditorPublicKeyP *auditor_pub,
const struct TALER_AuditorSignatureP *auditor_sig,
TALER_EXCHANGE_AuditorAddDenominationCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_add_auditor_denomination() operation.
*
* @param ah handle of the operation to cancel
*/
void
TALER_EXCHANGE_add_auditor_denomination_cancel (
struct TALER_EXCHANGE_AuditorAddDenominationHandle *ah);
/* ********************* W2W API ****************** */
/**
* Response generated for a contract get request.
*/
struct TALER_EXCHANGE_ContractGetResponse
{
/**
* Full HTTP response.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on the HTTP status code.
*/
union
{
/**
* Information returned on #MHD_HTTP_OK.
*/
struct
{
/**
* Public key of the purse.
*/
struct TALER_PurseContractPublicKeyP purse_pub;
/**
* Encrypted contract.
*/
const void *econtract;
/**
* Number of bytes in @e econtract.
*/
size_t econtract_size;
} success;
} details;
};
/**
* Function called with information about the a purse.
*
* @param cls closure
* @param cgr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ContractGetCallback) (
void *cls,
const struct TALER_EXCHANGE_ContractGetResponse *cgr);
/**
* @brief Handle for a GET /contracts/$CPUB request.
*/
struct TALER_EXCHANGE_ContractsGetHandle;
/**
* Request information about a contract from the exchange.
*
* @param exchange exchange handle
* @param contract_priv private key of the contract
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_ContractsGetHandle *
TALER_EXCHANGE_contract_get (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ContractDiffiePrivateP *contract_priv,
TALER_EXCHANGE_ContractGetCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_contract_get() operation.
*
* @param cgh handle of the operation to cancel
*/
void
TALER_EXCHANGE_contract_get_cancel (
struct TALER_EXCHANGE_ContractsGetHandle *cgh);
/**
* Response generated for a purse get request.
*/
struct TALER_EXCHANGE_PurseGetResponse
{
/**
* Full HTTP response.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on the HTTP status.
*/
union
{
/**
* Response on #MHD_HTTP_OK.
*/
struct
{
/**
* Time when the purse was merged (or zero if it
* was not merged).
*/
struct GNUNET_TIME_Timestamp merge_timestamp;
/**
* Time when the full amount was deposited into
* the purse (or zero if a sufficient amount
* was not yet deposited).
*/
struct GNUNET_TIME_Timestamp deposit_timestamp;
/**
* Reserve balance (how much was deposited in
* total into the reserve, minus deposit fees).
*/
struct TALER_Amount balance;
} success;
} details;
};
/**
* Function called with information about the a purse.
*
* @param cls closure
* @param pgr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_PurseGetCallback) (
void *cls,
const struct TALER_EXCHANGE_PurseGetResponse *pgr);
/**
* @brief Handle for a GET /purses/$PPUB request.
*/
struct TALER_EXCHANGE_PurseGetHandle;
/**
* Request information about a purse from the exchange.
*
* @param exchange exchange handle
* @param purse_pub public key of the purse
* @param timeout how long to wait for a change to happen
* @param wait_for_merge true to wait for a merge event, otherwise wait for a deposit event
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_PurseGetHandle *
TALER_EXCHANGE_purse_get (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_PurseContractPublicKeyP *purse_pub,
struct GNUNET_TIME_Relative timeout,
bool wait_for_merge,
TALER_EXCHANGE_PurseGetCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_purse_get() operation.
*
* @param pgh handle of the operation to cancel
*/
void
TALER_EXCHANGE_purse_get_cancel (
struct TALER_EXCHANGE_PurseGetHandle *pgh);
/**
* Response generated for a purse creation request.
*/
struct TALER_EXCHANGE_PurseCreateDepositResponse
{
/**
* Full HTTP response.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on the HTTP status.
*/
union
{
/**
* Detailed returned on #MHD_HTTP_OK.
*/
struct
{
/**
* Signing key used by the exchange to sign the
* purse create with deposit confirmation.
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* Signature from the exchange on the
* purse create with deposit confirmation.
*/
struct TALER_ExchangeSignatureP exchange_sig;
} success;
} details;
};
/**
* Function called with information about the creation
* of a new purse.
*
* @param cls closure
* @param pcr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_PurseCreateDepositCallback) (
void *cls,
const struct TALER_EXCHANGE_PurseCreateDepositResponse *pcr);
/**
* @brief Handle for a POST /purses/$PID/create request.
*/
struct TALER_EXCHANGE_PurseCreateDepositHandle;
/**
* Information about a coin to be deposited into a purse or reserve.
*/
struct TALER_EXCHANGE_PurseDeposit
{
/**
* Age commitment data, might be NULL.
*/
const struct TALER_AgeCommitmentProof *age_commitment_proof;
/**
* Private key of the coin.
*/
struct TALER_CoinSpendPrivateKeyP coin_priv;
/**
* Signature proving the validity of the coin.
*/
struct TALER_DenominationSignature denom_sig;
/**
* Hash of the denomination's public key.
*/
struct TALER_DenominationHashP h_denom_pub;
/**
* Amount of the coin to transfer into the purse.
*/
struct TALER_Amount amount;
};
/**
* Inform the exchange that a purse should be created
* and coins deposited into it.
*
* @param exchange the exchange to interact with
* @param purse_priv private key of the purse
* @param merge_priv the merge credential
* @param contract_priv key needed to obtain and decrypt the contract
* @param contract_terms contract the purse is about
* @param num_deposits length of the @a deposits array
* @param deposits array of deposits to make into the purse
* @param upload_contract true to upload the contract; must
* be FALSE for repeated calls to this API for the
* same purse (i.e. when adding more deposits).
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_PurseCreateDepositHandle *
TALER_EXCHANGE_purse_create_with_deposit (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_PurseContractPrivateKeyP *purse_priv,
const struct TALER_PurseMergePrivateKeyP *merge_priv,
const struct TALER_ContractDiffiePrivateP *contract_priv,
const json_t *contract_terms,
unsigned int num_deposits,
const struct TALER_EXCHANGE_PurseDeposit *deposits,
bool upload_contract,
TALER_EXCHANGE_PurseCreateDepositCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_purse_create_with_deposit() operation.
*
* @param pch handle of the operation to cancel
*/
void
TALER_EXCHANGE_purse_create_with_deposit_cancel (
struct TALER_EXCHANGE_PurseCreateDepositHandle *pch);
/**
* Response generated for an account merge request.
*/
struct TALER_EXCHANGE_AccountMergeResponse
{
/**
* Full HTTP response.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Reserve signature affirming the merge.
*/
const struct TALER_ReserveSignatureP *reserve_sig;
/**
* Details depending on the HTTP status.
*/
union
{
/**
* Detailed returned on #MHD_HTTP_OK.
*/
struct
{
/**
* Signature by the exchange affirming the merge.
*/
struct TALER_ExchangeSignatureP exchange_sig;
/**
* Online signing key used by the exchange.
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* Timestamp of the exchange for @e exchange_sig.
*/
struct GNUNET_TIME_Timestamp etime;
} success;
/**
* Details if the status is #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS.
*/
struct
{
/**
* Requirement row target that the merchant should use
* to check for its KYC status.
*/
uint64_t requirement_row;
} unavailable_for_legal_reasons;
} details;
};
/**
* Function called with information about an account merge
* operation.
*
* @param cls closure
* @param amr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_AccountMergeCallback) (
void *cls,
const struct TALER_EXCHANGE_AccountMergeResponse *amr);
/**
* @brief Handle for a POST /purses/$PID/merge request.
*/
struct TALER_EXCHANGE_AccountMergeHandle;
/**
* Inform the exchange that a purse should be merged
* with a reserve.
*
* @param exchange the exchange hosting the purse
* @param reserve_exchange_url base URL of the exchange with the reserve
* @param reserve_priv private key of the reserve to merge into
* @param purse_pub public key of the purse to merge
* @param merge_priv private key granting us the right to merge
* @param h_contract_terms hash of the purses' contract
* @param min_age minimum age of deposits into the purse
* @param purse_value_after_fees amount that should be in the purse
* @param purse_expiration when will the purse expire
* @param merge_timestamp when is the merge happening (current time)
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_AccountMergeHandle *
TALER_EXCHANGE_account_merge (
struct TALER_EXCHANGE_Handle *exchange,
const char *reserve_exchange_url,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const struct TALER_PurseContractPublicKeyP *purse_pub,
const struct TALER_PurseMergePrivateKeyP *merge_priv,
const struct TALER_PrivateContractHashP *h_contract_terms,
uint8_t min_age,
const struct TALER_Amount *purse_value_after_fees,
struct GNUNET_TIME_Timestamp purse_expiration,
struct GNUNET_TIME_Timestamp merge_timestamp,
TALER_EXCHANGE_AccountMergeCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_account_merge() operation.
*
* @param amh handle of the operation to cancel
*/
void
TALER_EXCHANGE_account_merge_cancel (
struct TALER_EXCHANGE_AccountMergeHandle *amh);
/**
* Response generated for a purse creation request.
*/
struct TALER_EXCHANGE_PurseCreateMergeResponse
{
/**
* Full HTTP response.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Reserve signature generated for the request
* (client-side).
*/
const struct TALER_ReserveSignatureP *reserve_sig;
/**
* Details depending on the HTTP status.
*/
union
{
/**
* Detailed returned on #MHD_HTTP_OK.
*/
struct
{
} success;
/**
* Details if the status is #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS.
*/
struct
{
/**
* Requirement row that the merchant should use
* to check for its KYC status.
*/
uint64_t requirement_row;
} unavailable_for_legal_reasons;
} details;
};
/**
* Function called with information about the creation
* of a new purse.
*
* @param cls closure
* @param pcr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_PurseCreateMergeCallback) (
void *cls,
const struct TALER_EXCHANGE_PurseCreateMergeResponse *pcr);
/**
* @brief Handle for a POST /reserves/$RID/purse request.
*/
struct TALER_EXCHANGE_PurseCreateMergeHandle;
/**
* Inform the exchange that a purse should be created
* and merged with a reserve.
*
* @param exchange the exchange hosting the reserve
* @param reserve_priv private key of the reserve
* @param purse_priv private key of the purse
* @param merge_priv private key of the merge capability
* @param contract_priv private key to get the contract
* @param contract_terms contract the purse is about
* @param upload_contract true to upload the contract
* @param pay_for_purse true to pay for purse creation
* @param merge_timestamp when should the merge happen (use current time)
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_PurseCreateMergeHandle *
TALER_EXCHANGE_purse_create_with_merge (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const struct TALER_PurseContractPrivateKeyP *purse_priv,
const struct TALER_PurseMergePrivateKeyP *merge_priv,
const struct TALER_ContractDiffiePrivateP *contract_priv,
const json_t *contract_terms,
bool upload_contract,
bool pay_for_purse,
struct GNUNET_TIME_Timestamp merge_timestamp,
TALER_EXCHANGE_PurseCreateMergeCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_purse_create_with_merge() operation.
*
* @param pcm handle of the operation to cancel
*/
void
TALER_EXCHANGE_purse_create_with_merge_cancel (
struct TALER_EXCHANGE_PurseCreateMergeHandle *pcm);
/**
* Response generated for purse deposit request.
*/
struct TALER_EXCHANGE_PurseDepositResponse
{
/**
* Full HTTP response.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on the HTTP status.
*/
union
{
/**
* Detailed returned on #MHD_HTTP_OK.
*/
struct
{
/**
* When does the purse expire.
*/
struct GNUNET_TIME_Timestamp purse_expiration;
/**
* How much was actually deposited into the purse.
*/
struct TALER_Amount total_deposited;
/**
* How much should be in the purse in total in the end.
*/
struct TALER_Amount purse_value_after_fees;
/**
* Hash of the contract (needed to verify signature).
*/
struct TALER_PrivateContractHashP h_contract_terms;
} success;
} details;
};
/**
* Function called with information about a purse-deposit
* operation.
*
* @param cls closure
* @param pdr HTTP response data
*/
typedef void
(*TALER_EXCHANGE_PurseDepositCallback) (
void *cls,
const struct TALER_EXCHANGE_PurseDepositResponse *pdr);
/**
* @brief Handle for a POST /purses/$PID/deposit request.
*/
struct TALER_EXCHANGE_PurseDepositHandle;
/**
* Inform the exchange that a deposit should be made into
* a purse.
*
* @param exchange the exchange that issued the coins
* @param purse_exchange_url base URL of the exchange hosting the purse
* @param purse_pub public key of the purse to merge
* @param min_age minimum age we need to prove for the purse
* @param num_deposits length of the @a deposits array
* @param deposits array of deposits to make into the purse
* @param cb function to call with the exchange's result
* @param cb_cls closure for @a cb
* @return the request handle; NULL upon error
*/
struct TALER_EXCHANGE_PurseDepositHandle *
TALER_EXCHANGE_purse_deposit (
struct TALER_EXCHANGE_Handle *exchange,
const char *purse_exchange_url,
const struct TALER_PurseContractPublicKeyP *purse_pub,
uint8_t min_age,
unsigned int num_deposits,
const struct TALER_EXCHANGE_PurseDeposit *deposits,
TALER_EXCHANGE_PurseDepositCallback cb,
void *cb_cls);
/**
* Cancel #TALER_EXCHANGE_purse_deposit() operation.
*
* @param amh handle of the operation to cancel
*/
void
TALER_EXCHANGE_purse_deposit_cancel (
struct TALER_EXCHANGE_PurseDepositHandle *amh);
/* ********************* /reserves/$RID/open *********************** */
/**
* @brief A /reserves/$RID/open Handle
*/
struct TALER_EXCHANGE_ReservesOpenHandle;
/**
* @brief Reserve open result details.
*/
struct TALER_EXCHANGE_ReserveOpenResult
{
/**
* High-level HTTP response details.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on @e hr.http_status.
*/
union
{
/**
* Information returned on success, if
* @e hr.http_status is #MHD_HTTP_OK
*/
struct
{
/**
* New expiration time
*/
struct GNUNET_TIME_Timestamp expiration_time;
/**
* Actual cost of the open operation.
*/
struct TALER_Amount open_cost;
} ok;
/**
* Information returned if the payment provided is insufficient, if
* @e hr.http_status is #MHD_HTTP_PAYMENT_REQUIRED
*/
struct
{
/**
* Current expiration time of the reserve.
*/
struct GNUNET_TIME_Timestamp expiration_time;
/**
* Actual cost of the open operation that should have been paid.
*/
struct TALER_Amount open_cost;
} payment_required;
/**
* Information returned if KYC is required to proceed, set if
* @e hr.http_status is #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS.
*/
struct
{
/**
* Requirement row that the merchant should use
* to check for its KYC status.
*/
uint64_t requirement_row;
/**
* Hash of the payto-URI of the account to KYC;
*/
struct TALER_PaytoHashP h_payto;
} unavailable_for_legal_reasons;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* reserve open request to a exchange.
*
* @param cls closure
* @param ror HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ReservesOpenCallback) (
void *cls,
const struct TALER_EXCHANGE_ReserveOpenResult *ror);
/**
* Submit a request to open a reserve.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param reserve_priv private key of the reserve to open
* @param reserve_contribution amount to pay from the reserve's balance for the operation
* @param coin_payments_length length of the @a coin_payments array
* @param coin_payments array of coin payments to use for opening the reserve
* @param expiration_time desired new expiration time for the reserve
* @param min_purses minimum number of purses to allow being concurrently opened per reserve
* @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_EXCHANGE_ReservesOpenHandle *
TALER_EXCHANGE_reserves_open (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const struct TALER_Amount *reserve_contribution,
unsigned int coin_payments_length,
const struct TALER_EXCHANGE_PurseDeposit *coin_payments,
struct GNUNET_TIME_Timestamp expiration_time,
uint32_t min_purses,
TALER_EXCHANGE_ReservesOpenCallback cb,
void *cb_cls);
/**
* Cancel a reserve status request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param roh the reserve open request handle
*/
void
TALER_EXCHANGE_reserves_open_cancel (
struct TALER_EXCHANGE_ReservesOpenHandle *roh);
/* ********************* /reserves/$RID/attest *********************** */
/**
* @brief A Get /reserves/$RID/attest Handle
*/
struct TALER_EXCHANGE_ReservesGetAttestHandle;
/**
* @brief Reserve GET attest result details.
*/
struct TALER_EXCHANGE_ReserveGetAttestResult
{
/**
* High-level HTTP response details.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on @e hr.http_status.
*/
union
{
/**
* Information returned on success, if
* @e hr.http_status is #MHD_HTTP_OK
*/
struct
{
/**
* Length of the @e attributes array.
*/
unsigned int attributes_length;
/**
* Array of attributes available about the user.
*/
const char **attributes;
} ok;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* reserve attest request to a exchange.
*
* @param cls closure
* @param ror HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ReservesGetAttestCallback) (
void *cls,
const struct TALER_EXCHANGE_ReserveGetAttestResult *ror);
/**
* Submit a request to get the list of attestable attributes for a reserve.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param reserve_pub public key of the reserve to get available attributes for
* @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_EXCHANGE_ReservesGetAttestHandle *
TALER_EXCHANGE_reserves_get_attestable (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePublicKeyP *reserve_pub,
TALER_EXCHANGE_ReservesGetAttestCallback cb,
void *cb_cls);
/**
* Cancel a request to get attestable attributes. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param rgah the reserve get attestable request handle
*/
void
TALER_EXCHANGE_reserves_get_attestable_cancel (
struct TALER_EXCHANGE_ReservesGetAttestHandle *rgah);
/**
* @brief A POST /reserves/$RID/attest Handle
*/
struct TALER_EXCHANGE_ReservesPostAttestHandle;
/**
* @brief Reserve attest result details.
*/
struct TALER_EXCHANGE_ReservePostAttestResult
{
/**
* High-level HTTP response details.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on @e hr.http_status.
*/
union
{
/**
* Information returned on success, if
* @e hr.http_status is #MHD_HTTP_OK
*/
struct
{
/**
* Time when the exchange made the signature.
*/
struct GNUNET_TIME_Timestamp exchange_time;
/**
* Current expiration time of the reserve.
*/
struct GNUNET_TIME_Timestamp expiration_time;
/**
* Signature by the exchange affirming the attributes.
*/
struct TALER_ExchangeSignatureP exchange_sig;
/**
* Online signing key used by the exchange.
*/
struct TALER_ExchangePublicKeyP exchange_pub;
/**
* Attributes being confirmed by the exchange.
*/
const json_t *attributes;
} ok;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* reserve attest request to a exchange.
*
* @param cls closure
* @param ror HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ReservesPostAttestCallback) (
void *cls,
const struct TALER_EXCHANGE_ReservePostAttestResult *ror);
/**
* Submit a request to attest attributes about the owner of a reserve.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param reserve_priv private key of the reserve to attest
* @param attributes_length length of the @a attributes array
* @param attributes array of names of attributes to get attestations for
* @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_EXCHANGE_ReservesAttestHandle *
TALER_EXCHANGE_reserves_attest (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
unsigned int attributes_length,
const char *const*attributes,
TALER_EXCHANGE_ReservesPostAttestCallback cb,
void *cb_cls);
/**
* Cancel a reserve attestation request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param rah the reserve attest request handle
*/
void
TALER_EXCHANGE_reserves_attest_cancel (
struct TALER_EXCHANGE_ReservesAttestHandle *rah);
/* ********************* /reserves/$RID/close *********************** */
/**
* @brief A /reserves/$RID/close Handle
*/
struct TALER_EXCHANGE_ReservesCloseHandle;
/**
* @brief Reserve close result details.
*/
struct TALER_EXCHANGE_ReserveCloseResult
{
/**
* High-level HTTP response details.
*/
struct TALER_EXCHANGE_HttpResponse hr;
/**
* Details depending on @e hr.http_status.
*/
union
{
/**
* Information returned on success, if
* @e hr.http_status is #MHD_HTTP_OK
*/
struct
{
/**
* Amount wired to the target account.
*/
struct TALER_Amount wire_amount;
} ok;
/**
* Information returned if KYC is required to proceed, set if
* @e hr.http_status is #MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS.
*/
struct
{
/**
* Requirement row that the merchant should use
* to check for its KYC status.
*/
uint64_t requirement_row;
/**
* Hash of the payto-URI of the account to KYC;
*/
struct TALER_PaytoHashP h_payto;
} unavailable_for_legal_reasons;
} details;
};
/**
* Callbacks of this type are used to serve the result of submitting a
* reserve close request to a exchange.
*
* @param cls closure
* @param ror HTTP response data
*/
typedef void
(*TALER_EXCHANGE_ReservesCloseCallback) (
void *cls,
const struct TALER_EXCHANGE_ReserveCloseResult *ror);
/**
* Submit a request to close a reserve.
*
* @param exchange the exchange handle; the exchange must be ready to operate
* @param reserve_priv private key of the reserve to close
* @param target_payto_uri where to send the payment, NULL to send to reserve origin
* @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_EXCHANGE_ReservesCloseHandle *
TALER_EXCHANGE_reserves_close (
struct TALER_EXCHANGE_Handle *exchange,
const struct TALER_ReservePrivateKeyP *reserve_priv,
const char *target_payto_uri,
TALER_EXCHANGE_ReservesCloseCallback cb,
void *cb_cls);
/**
* Cancel a reserve status request. This function cannot be used
* on a request handle if a response is already served for it.
*
* @param rch the reserve request handle
*/
void
TALER_EXCHANGE_reserves_close_cancel (
struct TALER_EXCHANGE_ReservesCloseHandle *rch);
#endif /* _TALER_EXCHANGE_SERVICE_H */