/*
This file is part of TALER
Copyright (C) 2014-2020 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see
*/
/**
* @file include/taler_exchangedb_plugin.h
* @brief Low-level (statement-level) database access for the exchange
* @author Florian Dold
* @author Christian Grothoff
*/
#ifndef TALER_EXCHANGEDB_PLUGIN_H
#define TALER_EXCHANGEDB_PLUGIN_H
#include
#include
#include
#include "taler_signatures.h"
GNUNET_NETWORK_STRUCT_BEGIN
/**
* @brief On disk format used for a exchange signing key. Signing keys are used
* by the exchange to affirm its messages, but not to create coins.
* Includes the private key followed by the public information about
* the signing key.
*/
struct TALER_EXCHANGEDB_PrivateSigningKeyInformationP
{
/**
* Private key part of the exchange's signing key.
*/
struct TALER_ExchangePrivateKeyP signkey_priv;
/**
* Signature over @e issue
*/
struct TALER_MasterSignatureP master_sig;
/**
* Public information about a exchange signing key.
*/
struct TALER_ExchangeSigningKeyValidityPS issue;
};
/**
* Information about a denomination key.
*/
struct TALER_EXCHANGEDB_DenominationKeyInformationP
{
/**
* Signature over this struct to affirm the validity of the key.
*/
struct TALER_MasterSignatureP signature;
/**
* Signed properties of the denomination key.
*/
struct TALER_DenominationKeyValidityPS properties;
};
GNUNET_NETWORK_STRUCT_END
/**
* @brief All information about a denomination key (which is used to
* sign coins into existence).
*/
struct TALER_EXCHANGEDB_DenominationKey
{
/**
* The private key of the denomination. Will be NULL if the private
* key is not available (this is the case after the key has expired
* for signing coins, but is still valid for depositing coins).
*/
struct TALER_DenominationPrivateKey denom_priv;
/**
* Decoded denomination public key (the hash of it is in
* @e issue, but we sometimes need the full public key as well).
*/
struct TALER_DenominationPublicKey denom_pub;
/**
* Signed public information about a denomination key.
*/
struct TALER_EXCHANGEDB_DenominationKeyInformationP issue;
};
/**
* @brief Information we keep on bank transfer(s) that established a reserve.
*/
struct TALER_EXCHANGEDB_BankTransfer
{
/**
* Public key of the reserve that was filled.
*/
struct TALER_ReservePublicKeyP reserve_pub;
/**
* Amount that was transferred to the exchange.
*/
struct TALER_Amount amount;
/**
* When did the exchange receive the incoming transaction?
* (This is the execution date of the exchange's database,
* the execution date of the bank should be in @e wire).
*/
struct GNUNET_TIME_Absolute execution_date;
/**
* Detailed wire information about the sending account
* in "payto://" format.
*/
char *sender_account_details;
/**
* Data uniquely identifying the wire transfer (wire transfer-type specific)
*/
void *wire_reference;
/**
* Number of bytes in @e wire_reference.
*/
size_t wire_reference_size;
};
/**
* @brief Information we keep on bank transfer(s) that
* closed a reserve.
*/
struct TALER_EXCHANGEDB_ClosingTransfer
{
/**
* Public key of the reserve that was depleted.
*/
struct TALER_ReservePublicKeyP reserve_pub;
/**
* Amount that was transferred to the exchange.
*/
struct TALER_Amount amount;
/**
* Amount that was charged by the exchange.
*/
struct TALER_Amount closing_fee;
/**
* When did the exchange execute the transaction?
*/
struct GNUNET_TIME_Absolute execution_date;
/**
* Detailed wire information about the receiving account
* in payto://-format.
*/
char *receiver_account_details;
/**
* Detailed wire transfer information that uniquely identifies the
* wire transfer.
*/
struct TALER_WireTransferIdentifierRawP wtid;
};
/**
* @brief A summary of a Reserve
*/
struct TALER_EXCHANGEDB_Reserve
{
/**
* The reserve's public key. This uniquely identifies the reserve
*/
struct TALER_ReservePublicKeyP pub;
/**
* The balance amount existing in the reserve
*/
struct TALER_Amount balance;
/**
* The expiration date of this reserve; funds will be wired back
* at this time.
*/
struct GNUNET_TIME_Absolute expiry;
/**
* The legal expiration date of this reserve; we will forget about
* it at this time.
*/
struct GNUNET_TIME_Absolute gc;
};
/**
* Meta data about a denomination public key.
*/
struct TALER_EXCHANGEDB_DenominationKeyMetaData
{
/**
* Start time of the validity period for this key.
*/
struct GNUNET_TIME_Absolute start;
/**
* The exchange will sign fresh coins between @e start and this time.
* @e expire_withdraw will be somewhat larger than @e start to
* ensure a sufficiently large anonymity set, while also allowing
* the Exchange to limit the financial damage in case of a key being
* compromised. Thus, exchanges with low volume are expected to have a
* longer withdraw period (@e expire_withdraw - @e start) than exchanges
* with high transaction volume. The period may also differ between
* types of coins. A exchange may also have a few denomination keys
* with the same value with overlapping validity periods, to address
* issues such as clock skew.
*/
struct GNUNET_TIME_Absolute expire_withdraw;
/**
* Coins signed with the denomination key must be spent or refreshed
* between @e start and this expiration time. After this time, the
* exchange will refuse transactions involving this key as it will
* "drop" the table with double-spending information (shortly after)
* this time. Note that wallets should refresh coins significantly
* before this time to be on the safe side. @e expire_deposit must be
* significantly larger than @e expire_withdraw (by months or even
* years).
*/
struct GNUNET_TIME_Absolute 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_Absolute expire_legal;
/**
* The value of the coins signed with this denomination key.
*/
struct TALER_Amount value;
/**
* The fee the exchange charges when a coin of this type is withdrawn.
* (can be zero).
*/
struct TALER_Amount fee_withdraw;
/**
* The fee the exchange charges when a coin of this type is deposited.
* (can be zero).
*/
struct TALER_Amount fee_deposit;
/**
* The fee the exchange charges when a coin of this type is refreshed.
* (can be zero).
*/
struct TALER_Amount fee_refresh;
/**
* The fee the exchange charges when a coin of this type is refunded.
* (can be zero). Note that refund fees are charged to the customer;
* if a refund is given, the deposit fee is also refunded.
*/
struct TALER_Amount fee_refund;
};
/**
* Signature of a function called with information about the exchange's
* denomination keys.
*
* @param cls closure with a `struct TEH_KeyStateHandle *`
* @param denom_pub public key of the denomination
* @param h_denom_pub hash of @a denom_pub
* @param meta meta data information about the denomination type (value, expirations, fees)
* @param master_sig master signature affirming the validity of this denomination
* @param recoup_possible true if the key was revoked and clients can currently recoup
* coins of this denomination
*/
typedef void
(*TALER_EXCHANGEDB_DenominationsCallback)(
void *cls,
const struct TALER_DenominationPublicKey *denom_pub,
const struct GNUNET_HashCode *h_denom_pub,
const struct TALER_EXCHANGEDB_DenominationKeyMetaData *meta,
const struct TALER_MasterSignatureP *master_sig,
bool recoup_possible);
/**
* Meta data about an exchange online signing key.
*/
struct TALER_EXCHANGEDB_SignkeyMetaData
{
/**
* Start time of the validity period for this key.
*/
struct GNUNET_TIME_Absolute start;
/**
* The exchange will sign messages with this key between @e start and this time.
*/
struct GNUNET_TIME_Absolute expire_sign;
/**
* When do signatures with this sign 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_sign (by a year or more).
*/
struct GNUNET_TIME_Absolute expire_legal;
};
/**
* Signature of a function called with information about the exchange's
* online signing keys.
*
* @param cls closure with a `struct TEH_KeyStateHandle *`
* @param exchange_pub public key of the exchange
* @param meta meta data information about the signing type (expirations)
* @param master_sig master signature affirming the validity of this denomination
*/
typedef void
(*TALER_EXCHANGEDB_ActiveSignkeysCallback)(
void *cls,
const struct TALER_ExchangePublicKeyP *exchange_pub,
const struct TALER_EXCHANGEDB_SignkeyMetaData *meta,
const struct TALER_MasterSignatureP *master_sig);
/**
* Function called with information about the exchange's auditors.
*
* @param cls closure with a `struct TEH_KeyStateHandle *`
* @param auditor_pub the public key of the auditor
* @param auditor_url URL of the REST API of the auditor
* @param auditor_name human readable official name of the auditor
*/
typedef void
(*TALER_EXCHANGEDB_AuditorsCallback)(
void *cls,
const struct TALER_AuditorPublicKeyP *auditor_pub,
const char *auditor_url,
const char *auditor_name);
/**
* Function called with information about the denominations
* audited by the exchange's auditors.
*
* @param cls closure with a `struct TEH_KeyStateHandle *`
* @param auditor_pub the public key of an auditor
* @param h_denom_pub hash of a denomination key audited by this auditor
* @param auditor_sig signature from the auditor affirming this
*/
typedef void
(*TALER_EXCHANGEDB_AuditorDenominationsCallback)(
void *cls,
const struct TALER_AuditorPublicKeyP *auditor_pub,
const struct GNUNET_HashCode *h_denom_pub,
const struct TALER_AuditorSignatureP *auditor_sig);
/**
* @brief Information we keep for a withdrawn coin to reproduce
* the /withdraw operation if needed, and to have proof
* that a reserve was drained by this amount.
*/
struct TALER_EXCHANGEDB_CollectableBlindcoin
{
/**
* Our signature over the (blinded) coin.
*/
struct TALER_DenominationSignature sig;
/**
* Hash of the denomination key (which coin was generated).
*/
struct GNUNET_HashCode denom_pub_hash;
/**
* Value of the coin being exchangeed (matching the denomination key)
* plus the transaction fee. We include this in what is being
* signed so that we can verify a reserve's remaining total balance
* without needing to access the respective denomination key
* information each time.
*/
struct TALER_Amount amount_with_fee;
/**
* Withdrawal fee charged by the exchange. This must match the Exchange's
* denomination key's withdrawal fee. If the client puts in an
* invalid withdrawal fee (too high or too low) that does not match
* the Exchange's denomination key, the withdraw operation is invalid
* and will be rejected by the exchange. The @e amount_with_fee minus
* the @e withdraw_fee is must match the value of the generated
* coin. We include this in what is being signed so that we can
* verify a exchange's accounting without needing to access the
* respective denomination key information each time.
*/
struct TALER_Amount withdraw_fee;
/**
* Public key of the reserve that was drained.
*/
struct TALER_ReservePublicKeyP reserve_pub;
/**
* Hash over the blinded message, needed to verify
* the @e reserve_sig.
*/
struct GNUNET_HashCode h_coin_envelope;
/**
* Signature confirming the withdrawal, matching @e reserve_pub,
* @e denom_pub and @e h_coin_envelope.
*/
struct TALER_ReserveSignatureP reserve_sig;
};
/**
* Information the exchange records about a recoup request
* in a reserve history.
*/
struct TALER_EXCHANGEDB_Recoup
{
/**
* Information about the coin that was paid back.
*/
struct TALER_CoinPublicInfo coin;
/**
* Blinding factor supplied to prove to the exchange that
* the coin came from this reserve.
*/
struct TALER_DenominationBlindingKeyP coin_blind;
/**
* Signature of the coin of type
* #TALER_SIGNATURE_WALLET_COIN_RECOUP.
*/
struct TALER_CoinSpendSignatureP coin_sig;
/**
* Public key of the reserve the coin was paid back into.
*/
struct TALER_ReservePublicKeyP reserve_pub;
/**
* How much was the coin still worth at this time?
*/
struct TALER_Amount value;
/**
* When did the recoup operation happen?
*/
struct GNUNET_TIME_Absolute timestamp;
};
/**
* Information the exchange records about a recoup request
* in a coin history.
*/
struct TALER_EXCHANGEDB_RecoupListEntry
{
/**
* Blinding factor supplied to prove to the exchange that
* the coin came from this reserve.
*/
struct TALER_DenominationBlindingKeyP coin_blind;
/**
* Signature of the coin of type
* #TALER_SIGNATURE_WALLET_COIN_RECOUP.
*/
struct TALER_CoinSpendSignatureP coin_sig;
/**
* Hash of the public denomination key used to sign the coin.
*/
struct GNUNET_HashCode h_denom_pub;
/**
* Public key of the reserve the coin was paid back into.
*/
struct TALER_ReservePublicKeyP reserve_pub;
/**
* How much was the coin still worth at this time?
*/
struct TALER_Amount value;
/**
* When did the /recoup operation happen?
*/
struct GNUNET_TIME_Absolute timestamp;
};
/**
* Information the exchange records about a recoup-refresh request in
* a coin transaction history.
*/
struct TALER_EXCHANGEDB_RecoupRefreshListEntry
{
/**
* Information about the coin that was paid back
* (NOT the coin we are considering the history of!)
*/
struct TALER_CoinPublicInfo coin;
/**
* Blinding factor supplied to prove to the exchange that
* the coin came from this @e old_coin_pub.
*/
struct TALER_DenominationBlindingKeyP coin_blind;
/**
* Signature of the coin of type
* #TALER_SIGNATURE_WALLET_COIN_RECOUP.
*/
struct TALER_CoinSpendSignatureP coin_sig;
/**
* Public key of the old coin that the refreshed coin was paid back to.
*/
struct TALER_CoinSpendPublicKeyP old_coin_pub;
/**
* How much was the coin still worth at this time?
*/
struct TALER_Amount value;
/**
* When did the recoup operation happen?
*/
struct GNUNET_TIME_Absolute timestamp;
};
/**
* @brief Types of operations on a reserve.
*/
enum TALER_EXCHANGEDB_ReserveOperation
{
/**
* Money was deposited into the reserve via a bank transfer.
* This is how customers establish a reserve at the exchange.
*/
TALER_EXCHANGEDB_RO_BANK_TO_EXCHANGE = 0,
/**
* A Coin was withdrawn from the reserve using /withdraw.
*/
TALER_EXCHANGEDB_RO_WITHDRAW_COIN = 1,
/**
* A coin was returned to the reserve using /recoup.
*/
TALER_EXCHANGEDB_RO_RECOUP_COIN = 2,
/**
* The exchange send inactive funds back from the reserve to the
* customer's bank account. This happens when the exchange
* closes a reserve with a non-zero amount left in it.
*/
TALER_EXCHANGEDB_RO_EXCHANGE_TO_BANK = 3
};
/**
* @brief Reserve history as a linked list. Lists all of the transactions
* associated with this reserve (such as the bank transfers that
* established the reserve and all /withdraw operations we have done
* since).
*/
struct TALER_EXCHANGEDB_ReserveHistory
{
/**
* Next entry in the reserve history.
*/
struct TALER_EXCHANGEDB_ReserveHistory *next;
/**
* Type of the event, determines @e details.
*/
enum TALER_EXCHANGEDB_ReserveOperation type;
/**
* Details of the operation, depending on @e type.
*/
union
{
/**
* Details about a bank transfer to the exchange (reserve
* was established).
*/
struct TALER_EXCHANGEDB_BankTransfer *bank;
/**
* Details about a /withdraw operation.
*/
struct TALER_EXCHANGEDB_CollectableBlindcoin *withdraw;
/**
* Details about a /recoup operation.
*/
struct TALER_EXCHANGEDB_Recoup *recoup;
/**
* Details about a bank transfer from the exchange (reserve
* was closed).
*/
struct TALER_EXCHANGEDB_ClosingTransfer *closing;
} details;
};
/**
* @brief Data from a deposit operation. The combination of
* the coin's public key, the merchant's public key and the
* transaction ID must be unique. While a coin can (theoretically) be
* deposited at the same merchant twice (with partial spending), the
* merchant must either use a different public key or a different
* transaction ID for the two transactions. The same coin must not
* be used twice at the same merchant for the same transaction
* (as determined by transaction ID).
*/
struct TALER_EXCHANGEDB_Deposit
{
/**
* Information about the coin that is being deposited.
*/
struct TALER_CoinPublicInfo coin;
/**
* ECDSA signature affirming that the customer intends
* this coin to be deposited at the merchant identified
* by @e h_wire in relation to the proposal data identified
* by @e h_contract_terms.
*/
struct TALER_CoinSpendSignatureP csig;
/**
* Public key of the merchant. Enables later identification
* of the merchant in case of a need to rollback transactions.
*/
struct TALER_MerchantPublicKeyP merchant_pub;
/**
* Hash over the proposa data between merchant and customer
* (remains unknown to the Exchange).
*/
struct GNUNET_HashCode h_contract_terms;
/**
* Hash of the (canonical) representation of @e wire, used
* to check the signature on the request. Generated by
* the exchange from the detailed wire data provided by the
* merchant.
*/
struct GNUNET_HashCode h_wire;
/**
* Detailed information about the receiver for executing the transaction.
* Includes URL in payto://-format and salt.
*/
json_t *receiver_wire_account;
/**
* Time when this request was generated. Used, for example, to
* assess when (roughly) the income was achieved for tax purposes.
* Note that the Exchange will only check that the timestamp is not "too
* far" into the future (i.e. several days). The fact that the
* timestamp falls within the validity period of the coin's
* denomination key is irrelevant for the validity of the deposit
* request, as obviously the customer and merchant could conspire to
* set any timestamp. Also, the Exchange must accept very old deposit
* requests, as the merchant might have been unable to transmit the
* deposit request in a timely fashion (so back-dating is not
* prevented).
*/
struct GNUNET_TIME_Absolute timestamp;
/**
* How much time does the merchant have to issue a refund request?
* Zero if refunds are not allowed. After this time, the coin
* cannot be refunded.
*/
struct GNUNET_TIME_Absolute refund_deadline;
/**
* How much time does the merchant have to execute the wire transfer?
* This time is advisory for aggregating transactions, not a hard
* constraint (as the merchant can theoretically pick any time,
* including one in the past).
*/
struct GNUNET_TIME_Absolute wire_deadline;
/**
* Fraction of the coin's remaining value to be deposited, including
* depositing fee (if any). The coin is identified by @e coin_pub.
*/
struct TALER_Amount amount_with_fee;
/**
* Depositing fee.
*/
struct TALER_Amount deposit_fee;
};
/**
* @brief Specification for a deposit operation in the
* `struct TALER_EXCHANGEDB_TransactionList`.
*/
struct TALER_EXCHANGEDB_DepositListEntry
{
/**
* ECDSA signature affirming that the customer intends
* this coin to be deposited at the merchant identified
* by @e h_wire in relation to the proposal data identified
* by @e h_contract_terms.
*/
struct TALER_CoinSpendSignatureP csig;
/**
* Public key of the merchant. Enables later identification
* of the merchant in case of a need to rollback transactions.
*/
struct TALER_MerchantPublicKeyP merchant_pub;
/**
* Hash over the proposa data between merchant and customer
* (remains unknown to the Exchange).
*/
struct GNUNET_HashCode h_contract_terms;
/**
* Hash of the (canonical) representation of @e wire, used
* to check the signature on the request. Generated by
* the exchange from the detailed wire data provided by the
* merchant.
*/
struct GNUNET_HashCode h_wire;
/**
* Hash of the public denomination key used to sign the coin.
*/
struct GNUNET_HashCode h_denom_pub;
/**
* Detailed information about the receiver for executing the transaction.
* Includes URL in payto://-format and salt.
*/
json_t *receiver_wire_account;
/**
* Time when this request was generated. Used, for example, to
* assess when (roughly) the income was achieved for tax purposes.
* Note that the Exchange will only check that the timestamp is not "too
* far" into the future (i.e. several days). The fact that the
* timestamp falls within the validity period of the coin's
* denomination key is irrelevant for the validity of the deposit
* request, as obviously the customer and merchant could conspire to
* set any timestamp. Also, the Exchange must accept very old deposit
* requests, as the merchant might have been unable to transmit the
* deposit request in a timely fashion (so back-dating is not
* prevented).
*/
struct GNUNET_TIME_Absolute timestamp;
/**
* How much time does the merchant have to issue a refund request?
* Zero if refunds are not allowed. After this time, the coin
* cannot be refunded.
*/
struct GNUNET_TIME_Absolute refund_deadline;
/**
* How much time does the merchant have to execute the wire transfer?
* This time is advisory for aggregating transactions, not a hard
* constraint (as the merchant can theoretically pick any time,
* including one in the past).
*/
struct GNUNET_TIME_Absolute wire_deadline;
/**
* Fraction of the coin's remaining value to be deposited, including
* depositing fee (if any). The coin is identified by @e coin_pub.
*/
struct TALER_Amount amount_with_fee;
/**
* Depositing fee.
*/
struct TALER_Amount deposit_fee;
/**
* Has the deposit been wired?
*/
bool done;
};
/**
* @brief Specification for a refund operation in a coin's transaction list.
*/
struct TALER_EXCHANGEDB_RefundListEntry
{
/**
* Public key of the merchant.
*/
struct TALER_MerchantPublicKeyP merchant_pub;
/**
* Signature from the merchant affirming the refund.
*/
struct TALER_MerchantSignatureP merchant_sig;
/**
* Hash over the proposal data between merchant and customer
* (remains unknown to the Exchange).
*/
struct GNUNET_HashCode h_contract_terms;
/**
* Merchant-generated REFUND transaction ID to detect duplicate
* refunds.
*/
uint64_t rtransaction_id;
/**
* Fraction of the original deposit's value to be refunded, including
* refund fee (if any). The coin is identified by @e coin_pub.
*/
struct TALER_Amount refund_amount;
/**
* Refund fee to be covered by the customer.
*/
struct TALER_Amount refund_fee;
};
/**
* @brief Specification for a refund operation. The combination of
* the coin's public key, the merchant's public key and the
* transaction ID must be unique. While a coin can (theoretically) be
* deposited at the same merchant twice (with partial spending), the
* merchant must either use a different public key or a different
* transaction ID for the two transactions. The same goes for
* refunds, hence we also have a "rtransaction" ID which is disjoint
* from the transaction ID. The same coin must not be used twice at
* the same merchant for the same transaction or rtransaction ID.
*/
struct TALER_EXCHANGEDB_Refund
{
/**
* Information about the coin that is being refunded.
*/
struct TALER_CoinPublicInfo coin;
/**
* Details about the refund.
*/
struct TALER_EXCHANGEDB_RefundListEntry details;
};
/**
* @brief Specification for coin in a melt operation.
*/
struct TALER_EXCHANGEDB_Refresh
{
/**
* Information about the coin that is being melted.
*/
struct TALER_CoinPublicInfo coin;
/**
* Signature over the melting operation.
*/
struct TALER_CoinSpendSignatureP coin_sig;
/**
* Refresh commitment this coin is melted into.
*/
struct TALER_RefreshCommitmentP rc;
/**
* How much value is being melted? This amount includes the fees,
* so the final amount contributed to the melt is this value minus
* the fee for melting the coin. We include the fee in what is
* being signed so that we can verify a reserve's remaining total
* balance without needing to access the respective denomination key
* information each time.
*/
struct TALER_Amount amount_with_fee;
/**
* Index (smaller #TALER_CNC_KAPPA) which the exchange has chosen to not
* have revealed during cut and choose.
*/
uint32_t noreveal_index;
};
/**
* Information about a /coins/$COIN_PUB/melt operation in a coin transaction history.
*/
struct TALER_EXCHANGEDB_MeltListEntry
{
/**
* Signature over the melting operation.
*/
struct TALER_CoinSpendSignatureP coin_sig;
/**
* Refresh commitment this coin is melted into.
*/
struct TALER_RefreshCommitmentP rc;
/**
* Hash of the public denomination key used to sign the coin.
*/
struct GNUNET_HashCode h_denom_pub;
/**
* How much value is being melted? This amount includes the fees,
* so the final amount contributed to the melt is this value minus
* the fee for melting the coin. We include the fee in what is
* being signed so that we can verify a reserve's remaining total
* balance without needing to access the respective denomination key
* information each time.
*/
struct TALER_Amount amount_with_fee;
/**
* Melt fee the exchange charged.
*/
struct TALER_Amount melt_fee;
/**
* Index (smaller #TALER_CNC_KAPPA) which the exchange has chosen to not
* have revealed during cut and choose.
*/
uint32_t noreveal_index;
};
/**
* Information about a melt operation.
*/
struct TALER_EXCHANGEDB_Melt
{
/**
* Overall session data.
*/
struct TALER_EXCHANGEDB_Refresh session;
/**
* Melt fee the exchange charged.
*/
struct TALER_Amount melt_fee;
};
/**
* @brief Linked list of refresh information linked to a coin.
*/
struct TALER_EXCHANGEDB_LinkList
{
/**
* Information is stored in a NULL-terminated linked list.
*/
struct TALER_EXCHANGEDB_LinkList *next;
/**
* Denomination public key, determines the value of the coin.
*/
struct TALER_DenominationPublicKey denom_pub;
/**
* Signature over the blinded envelope.
*/
struct TALER_DenominationSignature ev_sig;
/**
* Signature of the original coin being refreshed over the
* link data, of type #TALER_SIGNATURE_WALLET_COIN_LINK
*/
struct TALER_CoinSpendSignatureP orig_coin_link_sig;
};
/**
* @brief Enumeration to classify the different types of transactions
* that can be done with a coin.
*/
enum TALER_EXCHANGEDB_TransactionType
{
/**
* Deposit operation.
*/
TALER_EXCHANGEDB_TT_DEPOSIT = 0,
/**
* Melt operation.
*/
TALER_EXCHANGEDB_TT_MELT = 1,
/**
* Refund operation.
*/
TALER_EXCHANGEDB_TT_REFUND = 2,
/**
* Recoup-refresh operation (on the old coin, adding to the old coin's value)
*/
TALER_EXCHANGEDB_TT_OLD_COIN_RECOUP = 3,
/**
* Recoup operation.
*/
TALER_EXCHANGEDB_TT_RECOUP = 4,
/**
* Recoup-refresh operation (on the new coin, eliminating its value)
*/
TALER_EXCHANGEDB_TT_RECOUP_REFRESH = 5
};
/**
* @brief List of transactions we performed for a particular coin.
*/
struct TALER_EXCHANGEDB_TransactionList
{
/**
* Next pointer in the NULL-terminated linked list.
*/
struct TALER_EXCHANGEDB_TransactionList *next;
/**
* Type of the transaction, determines what is stored in @e details.
*/
enum TALER_EXCHANGEDB_TransactionType type;
/**
* Serial ID of this entry in the database.
*/
uint64_t serial_id;
/**
* Details about the transaction, depending on @e type.
*/
union
{
/**
* Details if transaction was a deposit operation.
* (#TALER_EXCHANGEDB_TT_DEPOSIT)
*/
struct TALER_EXCHANGEDB_DepositListEntry *deposit;
/**
* Details if transaction was a melt operation.
* (#TALER_EXCHANGEDB_TT_MELT)
*/
struct TALER_EXCHANGEDB_MeltListEntry *melt;
/**
* Details if transaction was a refund operation.
* (#TALER_EXCHANGEDB_TT_REFUND)
*/
struct TALER_EXCHANGEDB_RefundListEntry *refund;
/**
* Details if transaction was a recoup-refund operation where
* this coin was the OLD coin.
* (#TALER_EXCHANGEDB_TT_OLD_COIN_RECOUP).
*/
struct TALER_EXCHANGEDB_RecoupRefreshListEntry *old_coin_recoup;
/**
* Details if transaction was a recoup operation.
* (#TALER_EXCHANGEDB_TT_RECOUP)
*/
struct TALER_EXCHANGEDB_RecoupListEntry *recoup;
/**
* Details if transaction was a recoup-refund operation where
* this coin was the REFRESHED coin.
* (#TALER_EXCHANGEDB_TT_RECOUP_REFRESH)
*/
struct TALER_EXCHANGEDB_RecoupRefreshListEntry *recoup_refresh;
} details;
};
/**
* @brief Handle for a database session (per-thread, for transactions).
*/
struct TALER_EXCHANGEDB_Session;
/**
* Function called with details about deposits that have been made,
* with the goal of executing the corresponding wire transaction.
*
* @param cls closure
* @param rowid unique ID for the deposit in our DB, used for marking
* it as 'tiny' or 'done'
* @param coin_pub public key of the coin
* @param amount_with_fee amount that was deposited including fee
* @param deposit_fee amount the exchange gets to keep as transaction fees
* @param h_contract_terms hash of the proposal data known to merchant and customer
* @return transaction status code, #GNUNET_DB_STATUS_SUCCESS_ONE_RESULT to continue to iterate
*/
typedef enum GNUNET_DB_QueryStatus
(*TALER_EXCHANGEDB_MatchingDepositIterator)(
void *cls,
uint64_t rowid,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *amount_with_fee,
const struct TALER_Amount *deposit_fee,
const struct GNUNET_HashCode *h_contract_terms);
/**
* Function called with details about deposits that have been made,
* with the goal of executing the corresponding wire transaction.
*
* @param cls closure
* @param rowid unique ID for the deposit in our DB, used for marking
* it as 'tiny' or 'done'
* @param exchange_timestamp when did the exchange receive the deposit
* @param wallet_timestamp when did the wallet sign the contract
* @param merchant_pub public key of the merchant
* @param coin_pub public key of the coin
* @param amount_with_fee amount that was deposited including fee
* @param deposit_fee amount the exchange gets to keep as transaction fees
* @param h_contract_terms hash of the proposal data known to merchant and customer
* @param wire_deadline by which the merchant advised that he would like the
* wire transfer to be executed
* @param receiver_wire_account wire details for the merchant, includes
* 'url' in payto://-format;
* @return transaction status code, #GNUNET_DB_STATUS_SUCCESS_ONE_RESULT to continue to iterate
*/
typedef enum GNUNET_DB_QueryStatus
(*TALER_EXCHANGEDB_DepositIterator)(
void *cls,
uint64_t rowid,
struct GNUNET_TIME_Absolute exchange_timestamp,
struct GNUNET_TIME_Absolute wallet_timestamp,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *amount_with_fee,
const struct TALER_Amount *deposit_fee,
const struct GNUNET_HashCode *h_contract_terms,
struct GNUNET_TIME_Absolute wire_deadline,
const json_t *receiver_wire_account);
/**
* Callback with data about a prepared wire transfer.
*
* @param cls closure
* @param rowid row identifier used to mark prepared transaction as done
* @param wire_method which wire method is this preparation data for
* @param buf transaction data that was persisted, NULL on error
* @param buf_size number of bytes in @a buf, 0 on error
*/
typedef void
(*TALER_EXCHANGEDB_WirePreparationIterator) (void *cls,
uint64_t rowid,
const char *wire_method,
const char *buf,
size_t buf_size);
/**
* Function called with details about deposits that have been made,
* with the goal of auditing the deposit's execution.
*
* @param cls closure
* @param rowid unique serial ID for the deposit in our DB
* @param exchange_timestamp when did the deposit happen
* @param wallet_timestamp when did the contract happen
* @param merchant_pub public key of the merchant
* @param denom_pub denomination public key of @a coin_pub
* @param coin_pub public key of the coin
* @param coin_sig signature from the coin
* @param amount_with_fee amount that was deposited including fee
* @param h_contract_terms hash of the proposal data known to merchant and customer
* @param refund_deadline by which the merchant advised that he might want
* to get a refund
* @param wire_deadline by which the merchant advised that he would like the
* wire transfer to be executed
* @param receiver_wire_account wire details for the merchant including 'url' in payto://-format;
* NULL from iterate_matching_deposits()
* @param done flag set if the deposit was already executed (or not)
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
typedef int
(*TALER_EXCHANGEDB_DepositCallback)(
void *cls,
uint64_t rowid,
struct GNUNET_TIME_Absolute exchange_timestamp,
struct GNUNET_TIME_Absolute wallet_timestamp,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_Amount *amount_with_fee,
const struct GNUNET_HashCode *h_contract_terms,
struct GNUNET_TIME_Absolute refund_deadline,
struct GNUNET_TIME_Absolute wire_deadline,
const json_t *receiver_wire_account,
int done);
/**
* Function called with details about coins that were melted,
* with the goal of auditing the refresh's execution.
*
* @param cls closure
* @param rowid unique serial ID for the refresh session in our DB
* @param denom_pub denomination public key of @a coin_pub
* @param coin_pub public key of the coin
* @param coin_sig signature from the coin
* @param amount_with_fee amount that was deposited including fee
* @param noreveal_index which index was picked by the exchange in cut-and-choose
* @param rc what is the commitment
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
typedef int
(*TALER_EXCHANGEDB_RefreshesCallback)(
void *cls,
uint64_t rowid,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_Amount *amount_with_fee,
uint32_t noreveal_index,
const struct TALER_RefreshCommitmentP *rc);
/**
* Callback invoked with information about refunds applicable
* to a particular coin and contract.
*
* @param cls closure
* @param amount_with_fee amount being refunded
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
typedef int
(*TALER_EXCHANGEDB_RefundCoinCallback)(
void *cls,
const struct TALER_Amount *amount_with_fee);
/**
* Information about a coin that was revealed to the exchange
* during reveal.
*/
struct TALER_EXCHANGEDB_RefreshRevealedCoin
{
/**
* Public denomination key of the coin.
*/
struct TALER_DenominationPublicKey denom_pub;
/**
* Signature of the original coin being refreshed over the
* link data, of type #TALER_SIGNATURE_WALLET_COIN_LINK
*/
struct TALER_CoinSpendSignatureP orig_coin_link_sig;
/**
* Blinded message to be signed (in envelope), with @e coin_env_size bytes.
*/
char *coin_ev;
/**
* Number of bytes in @e coin_ev.
*/
size_t coin_ev_size;
/**
* Signature generated by the exchange over the coin (in blinded format).
*/
struct TALER_DenominationSignature coin_sig;
};
/**
* Function called with information about a refresh order.
*
* @param cls closure
* @param rowid unique serial ID for the row in our database
* @param num_freshcoins size of the @a rrcs array
* @param rrcs array of @a num_freshcoins information about coins to be created
* @param num_tprivs number of entries in @a tprivs, should be #TALER_CNC_KAPPA - 1
* @param tprivs array of @e num_tprivs transfer private keys
* @param tp transfer public key information
*/
typedef void
(*TALER_EXCHANGEDB_RefreshCallback)(
void *cls,
uint32_t num_freshcoins,
const struct TALER_EXCHANGEDB_RefreshRevealedCoin *rrcs,
unsigned int num_tprivs,
const struct TALER_TransferPrivateKeyP *tprivs,
const struct TALER_TransferPublicKeyP *tp);
/**
* Function called with details about coins that were refunding,
* with the goal of auditing the refund's execution.
*
* @param cls closure
* @param rowid unique serial ID for the refund in our DB
* @param denom_pub denomination public key of @a coin_pub
* @param coin_pub public key of the coin
* @param merchant_pub public key of the merchant
* @param merchant_sig signature of the merchant
* @param h_contract_terms hash of the proposal data known to merchant and customer
* @param rtransaction_id refund transaction ID chosen by the merchant
* @param amount_with_fee amount that was deposited including fee
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
typedef int
(*TALER_EXCHANGEDB_RefundCallback)(
void *cls,
uint64_t rowid,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct TALER_MerchantSignatureP *merchant_sig,
const struct GNUNET_HashCode *h_contract_terms,
uint64_t rtransaction_id,
const struct TALER_Amount *amount_with_fee);
/**
* Function called with details about incoming wire transfers.
*
* @param cls closure
* @param rowid unique serial ID for the refresh session in our DB
* @param reserve_pub public key of the reserve (also the WTID)
* @param credit amount that was received
* @param sender_account_details information about the sender's bank account, in payto://-format
* @param wire_reference unique identifier for the wire transfer
* @param execution_date when did we receive the funds
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
typedef int
(*TALER_EXCHANGEDB_ReserveInCallback)(
void *cls,
uint64_t rowid,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_Amount *credit,
const char *sender_account_details,
uint64_t wire_reference,
struct GNUNET_TIME_Absolute execution_date);
/**
* Function called with details about withdraw operations.
*
* @param cls closure
* @param rowid unique serial ID for the refresh session in our DB
* @param h_blind_ev blinded hash of the coin's public key
* @param denom_pub public denomination key of the deposited coin
* @param reserve_pub public key of the reserve
* @param reserve_sig signature over the withdraw operation
* @param execution_date when did the wallet withdraw the coin
* @param amount_with_fee amount that was withdrawn
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
typedef int
(*TALER_EXCHANGEDB_WithdrawCallback)(
void *cls,
uint64_t rowid,
const struct GNUNET_HashCode *h_blind_ev,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_ReserveSignatureP *reserve_sig,
struct GNUNET_TIME_Absolute execution_date,
const struct TALER_Amount *amount_with_fee);
/**
* Function called with the session hashes and transfer secret
* information for a given coin.
*
* @param cls closure
* @param transfer_pub public transfer key for the session
* @param ldl link data for @a transfer_pub
*/
typedef void
(*TALER_EXCHANGEDB_LinkCallback)(
void *cls,
const struct TALER_TransferPublicKeyP *transfer_pub,
const struct TALER_EXCHANGEDB_LinkList *ldl);
/**
* Function called with the results of the lookup of the wire transfer
* identifier information. Only called if we are at least aware of the
* transaction existing.
*
* @param cls closure
* @param wtid wire transfer identifier, NULL
* if the transaction was not yet done
* @param coin_contribution how much did the coin we asked about
* contribute to the total transfer value? (deposit value including fee)
* @param coin_fee how much did the exchange charge for the deposit fee
* @param execution_time when was the transaction done, or
* when we expect it to be done (if @a wtid was NULL)
*/
typedef void
(*TALER_EXCHANGEDB_WireTransferByCoinCallback)(
void *cls,
const struct TALER_WireTransferIdentifierRawP *wtid,
const struct TALER_Amount *coin_contribution,
const struct TALER_Amount *coin_fee,
struct GNUNET_TIME_Absolute execution_time);
/**
* Function called with the results of the lookup of the
* transaction data associated with a wire transfer identifier.
*
* @param cls closure
* @param rowid which row in the table is the information from (for diagnostics)
* @param merchant_pub public key of the merchant (should be same for all callbacks with the same @e cls)
* @param h_wire hash of wire transfer details of the merchant (should be same for all callbacks with the same @e cls)
* @param account_details which account did the transfer go to?
* @param exec_time execution time of the wire transfer (should be same for all callbacks with the same @e cls)
* @param h_contract_terms which proposal was this payment about
* @param denom_pub denomination of @a coin_pub
* @param coin_pub which public key was this payment about
* @param coin_value amount contributed by this coin in total (with fee)
* @param coin_fee applicable fee for this coin
*/
typedef void
(*TALER_EXCHANGEDB_AggregationDataCallback)(
void *cls,
uint64_t rowid,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct GNUNET_HashCode *h_wire,
const json_t *account_details,
struct GNUNET_TIME_Absolute exec_time,
const struct GNUNET_HashCode *h_contract_terms,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *coin_value,
const struct TALER_Amount *coin_fee);
/**
* Function called with the results of the lookup of the
* wire transfer data of the exchange.
*
* @param cls closure
* @param rowid identifier of the respective row in the database
* @param date timestamp of the wire transfer (roughly)
* @param wtid wire transfer subject
* @param wire wire transfer details of the receiver, including "url" in payto://-format
* @param amount amount that was wired
* @return #GNUNET_OK to continue, #GNUNET_SYSERR to stop iteration
*/
typedef int
(*TALER_EXCHANGEDB_WireTransferOutCallback)(
void *cls,
uint64_t rowid,
struct GNUNET_TIME_Absolute date,
const struct TALER_WireTransferIdentifierRawP *wtid,
const json_t *wire,
const struct TALER_Amount *amount);
/**
* Callback with data about a prepared wire transfer.
*
* @param cls closure
* @param rowid row identifier used to mark prepared transaction as done
* @param wire_method which wire method is this preparation data for
* @param buf transaction data that was persisted, NULL on error
* @param buf_size number of bytes in @a buf, 0 on error
* @param finished did we complete the transfer yet?
* @return #GNUNET_OK to continue, #GNUNET_SYSERR to stop iteration
*/
typedef int
(*TALER_EXCHANGEDB_WirePreparationCallback)(void *cls,
uint64_t rowid,
const char *wire_method,
const char *buf,
size_t buf_size,
int finished);
/**
* Function called about recoups the exchange has to perform.
*
* @param cls closure
* @param rowid row identifier used to uniquely identify the recoup operation
* @param timestamp when did we receive the recoup request
* @param amount how much should be added back to the reserve
* @param reserve_pub public key of the reserve
* @param coin public information about the coin
* @param denom_pub denomination key of @a coin
* @param coin_sig signature with @e coin_pub of type #TALER_SIGNATURE_WALLET_COIN_RECOUP
* @param coin_blind blinding factor used to blind the coin
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
typedef int
(*TALER_EXCHANGEDB_RecoupCallback)(
void *cls,
uint64_t rowid,
struct GNUNET_TIME_Absolute timestamp,
const struct TALER_Amount *amount,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_CoinPublicInfo *coin,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_DenominationBlindingKeyP *coin_blind);
/**
* Function called about recoups on refreshed coins the exchange has to
* perform.
*
* @param cls closure
* @param rowid row identifier used to uniquely identify the recoup operation
* @param timestamp when did we receive the recoup request
* @param amount how much should be added back to the reserve
* @param old_coin_pub original coin that was refreshed to create @a coin
* @param old_denom_pub_hash hash of public key of @a old_coin_pub
* @param coin public information about the coin
* @param denom_pub denomination key of @a coin
* @param coin_sig signature with @e coin_pub of type #TALER_SIGNATURE_WALLET_COIN_RECOUP
* @param coin_blind blinding factor used to blind the coin
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
typedef int
(*TALER_EXCHANGEDB_RecoupRefreshCallback)(
void *cls,
uint64_t rowid,
struct GNUNET_TIME_Absolute timestamp,
const struct TALER_Amount *amount,
const struct TALER_CoinSpendPublicKeyP *old_coin_pub,
const struct GNUNET_HashCode *old_denom_pub_hash,
const struct TALER_CoinPublicInfo *coin,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_DenominationBlindingKeyP *coin_blind);
/**
* Function called about reserve closing operations
* the aggregator triggered.
*
* @param cls closure
* @param rowid row identifier used to uniquely identify the reserve closing operation
* @param execution_date when did we execute the close operation
* @param amount_with_fee how much did we debit the reserve
* @param closing_fee how much did we charge for closing the reserve
* @param reserve_pub public key of the reserve
* @param receiver_account where did we send the funds, in payto://-format
* @param wtid identifier used for the wire transfer
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
typedef int
(*TALER_EXCHANGEDB_ReserveClosedCallback)(
void *cls,
uint64_t rowid,
struct GNUNET_TIME_Absolute execution_date,
const struct TALER_Amount *amount_with_fee,
const struct TALER_Amount *closing_fee,
const struct TALER_ReservePublicKeyP *reserve_pub,
const char *receiver_account,
const struct TALER_WireTransferIdentifierRawP *wtid);
/**
* Function called with details about expired reserves.
*
* @param cls closure
* @param reserve_pub public key of the reserve
* @param left amount left in the reserve
* @param account_details information about the reserve's bank account, in payto://-format
* @param expiration_date when did the reserve expire
* @return transaction status code to pass on
*/
typedef enum GNUNET_DB_QueryStatus
(*TALER_EXCHANGEDB_ReserveExpiredCallback)(
void *cls,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_Amount *left,
const char *account_details,
struct GNUNET_TIME_Absolute expiration_date);
/**
* Function called with information justifying an aggregate recoup.
* (usually implemented by the auditor when verifying losses from recoups).
*
* @param cls closure
* @param rowid row identifier used to uniquely identify the recoup operation
* @param coin information about the coin
* @param coin_sig signature of the coin of type #TALER_SIGNATURE_WALLET_COIN_RECOUP
* @param coin_blind blinding key of the coin
* @param h_blind_ev blinded envelope, as calculated by the exchange
* @param amount total amount to be paid back
*/
typedef void
(*TALER_EXCHANGEDB_RecoupJustificationCallback)(
void *cls,
uint64_t rowid,
const struct TALER_CoinPublicInfo *coin,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_DenominationBlindingKeyP *coin_blind,
const struct GNUNET_HashCode *h_blinded_ev,
const struct TALER_Amount *amount);
/**
* Function called on deposits that are past their due date
* and have not yet seen a wire transfer.
*
* @param cls closure
* @param rowid deposit table row of the coin's deposit
* @param coin_pub public key of the coin
* @param amount value of the deposit, including fee
* @param wire where should the funds be wired, including 'url' in payto://-format
* @param deadline what was the requested wire transfer deadline
* @param tiny did the exchange defer this transfer because it is too small?
* @param done did the exchange claim that it made a transfer?
*/
typedef void
(*TALER_EXCHANGEDB_WireMissingCallback)(
void *cls,
uint64_t rowid,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *amount,
const json_t *wire,
struct GNUNET_TIME_Absolute deadline,
/* bool? */ int tiny,
/* bool? */ int done);
/**
* Function called with information about the exchange's denomination keys.
*
* @param cls closure
* @param denom_pub public key of the denomination
* @param issue detailed information about the denomination (value, expiration times, fees)
*/
typedef void
(*TALER_EXCHANGEDB_DenominationCallback)(
void *cls,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_EXCHANGEDB_DenominationKeyInformationP *issue);
/**
* @brief The plugin API, returned from the plugin's "init" function.
* The argument given to "init" is simply a configuration handle.
*/
struct TALER_EXCHANGEDB_Plugin
{
/**
* Closure for all callbacks.
*/
void *cls;
/**
* Name of the library which generated this plugin. Set by the
* plugin loader.
*/
char *library_name;
/**
* Get the thread-local (!) database-handle.
* Connect to the db if the connection does not exist yet.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @returns the database connection, or NULL on error
*/
struct TALER_EXCHANGEDB_Session *
(*get_session) (void *cls);
/**
* Drop the Taler tables. This should only be used in testcases.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
*/
int
(*drop_tables) (void *cls);
/**
* Create the necessary tables if they are not present
*
* @param cls the @e cls of this struct with the plugin-specific state
* @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
*/
int
(*create_tables) (void *cls);
/**
* Start a transaction.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to use
* @param name unique name identifying the transaction (for debugging),
* must point to a constant
* @return #GNUNET_OK on success
*/
int
(*start) (void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *name);
/**
* Commit a transaction.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to use
* @return transaction status
*/
enum GNUNET_DB_QueryStatus
(*commit)(void *cls,
struct TALER_EXCHANGEDB_Session *session);
/**
* Do a pre-flight check that we are not in an uncommitted transaction.
* If we are, try to commit the previous transaction and output a warning.
* Does not return anything, as we will continue regardless of the outcome.
*
* @param cls the `struct PostgresClosure` with the plugin-specific state
* @param session the database connection
*/
void
(*preflight) (void *cls,
struct TALER_EXCHANGEDB_Session *session);
/**
* Abort/rollback a transaction.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to use
*/
void
(*rollback) (void *cls,
struct TALER_EXCHANGEDB_Session *session);
/**
* Insert information about a denomination key and in particular
* the properties (value, fees, expiration times) the coins signed
* with this key have.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to use
* @param denom_pub the public key used for signing coins of this denomination
* @param issue issuing information with value, fees and other info about the denomination
* @return status of the query
*/
enum GNUNET_DB_QueryStatus
(*insert_denomination_info)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_EXCHANGEDB_DenominationKeyInformationP *issue);
/**
* Fetch information about a denomination key.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to use
* @param denom_pub_hash hash of the public key used for signing coins of this denomination
* @param[out] issue set to issue information with value, fees and other info about the coin
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*get_denomination_info)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *denom_pub_hash,
struct TALER_EXCHANGEDB_DenominationKeyInformationP *issue);
/**
* Function called on every known denomination key. Runs in its
* own read-only transaction (hence no session provided).
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param cb function to call on each denomination key
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*iterate_denomination_info)(void *cls,
TALER_EXCHANGEDB_DenominationCallback cb,
void *cb_cls);
/**
* Function called to invoke @a cb on every known denomination key (revoked
* and non-revoked) that has been signed by the master key. Runs in its own
* read-only transaction (hence no session provided).
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param cb function to call on each denomination key
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*iterate_denominations)(void *cls,
TALER_EXCHANGEDB_DenominationsCallback cb,
void *cb_cls);
/**
* Function called to invoke @a cb on every non-revoked exchange signing key
* that has been signed by the master key. Revoked and (for signing!)
* expired keys are skipped. Runs in its own read-only transaction (hence no
* session provided).
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param cb function to call on each signing key
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*iterate_active_signkeys)(void *cls,
TALER_EXCHANGEDB_ActiveSignkeysCallback cb,
void *cb_cls);
/**
* Function called to invoke @a cb on every active auditor. Disabled
* auditors are skipped. Runs in its own read-only transaction (hence no
* session provided).
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param cb function to call on each active auditor
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*iterate_active_auditors)(void *cls,
TALER_EXCHANGEDB_AuditorsCallback cb,
void *cb_cls);
/**
* Function called to invoke @a cb on every denomination with an active
* auditor. Disabled auditors and denominations without auditor are
* skipped. Runs in its own read-only transaction (hence no session
* provided).
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param cb function to call on each active auditor-denomination pair
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*iterate_auditor_denominations)(
void *cls,
TALER_EXCHANGEDB_AuditorDenominationsCallback cb,
void *cb_cls);
/**
* Get the summary of a reserve.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session the database connection handle
* @param[in,out] reserve the reserve data. The public key of the reserve should be set
* in this structure; it is used to query the database. The balance
* and expiration are then filled accordingly.
* @return transaction status
*/
enum GNUNET_DB_QueryStatus
(*reserves_get)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
struct TALER_EXCHANGEDB_Reserve *reserve);
/**
* Insert a incoming transaction into reserves. New reserves are
* also created through this function.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session the database session handle
* @param reserve_pub public key of the reserve
* @param balance the amount that has to be added to the reserve
* @param execution_time when was the amount added
* @param sender_account_details information about the sender's bank account, in payto://-format
* @param wire_reference unique reference identifying the wire transfer
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*reserves_in_insert)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_Amount *balance,
struct GNUNET_TIME_Absolute execution_time,
const char *sender_account_details,
const char *exchange_account_name,
uint64_t wire_reference);
/**
* Obtain the most recent @a wire_reference that was inserted via @e reserves_in_insert.
* Used by the wirewatch process when resuming.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session the database connection handle
* @param exchange_account_name name of the section in the exchange's configuration
* for the account that we are tracking here
* @param[out] wire_reference set to unique reference identifying the wire transfer
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*get_latest_reserve_in_reference)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *exchange_account_name,
uint64_t *wire_reference);
/**
* Locate the response for a withdraw request under the
* key of the hash of the blinded message. Used to ensure
* idempotency of the request.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database connection to use
* @param h_blind hash of the blinded coin to be signed (will match
* `h_coin_envelope` in the @a collectable to be returned)
* @param collectable corresponding collectable coin (blind signature)
* if a coin is found
* @return statement execution status
*/
enum GNUNET_DB_QueryStatus
(*get_withdraw_info)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *h_blind,
struct TALER_EXCHANGEDB_CollectableBlindcoin *collectable);
/**
* Store collectable coin under the corresponding hash of the blinded
* message.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database connection to use
* @param collectable corresponding collectable coin (blind signature)
* if a coin is found
* @return statement execution status
*/
enum GNUNET_DB_QueryStatus
(*insert_withdraw_info)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct
TALER_EXCHANGEDB_CollectableBlindcoin *collectable);
/**
* Get all of the transaction history associated with the specified
* reserve.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to use
* @param reserve_pub public key of the reserve
* @param[out] rhp set to known transaction history (NULL if reserve is unknown)
* @return transaction status
*/
enum GNUNET_DB_QueryStatus
(*get_reserve_history)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_ReservePublicKeyP *reserve_pub,
struct TALER_EXCHANGEDB_ReserveHistory **rhp);
/**
* Free memory associated with the given reserve history.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param rh history to free.
*/
void
(*free_reserve_history) (void *cls,
struct TALER_EXCHANGEDB_ReserveHistory *rh);
/**
* Count the number of known coins by denomination.
*
* @param cls database connection plugin state
* @param session database session
* @param denom_pub_hash denomination to count by
* @return number of coins if non-negative, otherwise an `enum GNUNET_DB_QueryStatus`
*/
long long
(*count_known_coins) (void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *denom_pub_hash);
/**
* Make sure the given @a coin is known to the database.
*
* @param cls database connection plugin state
* @param session database session
* @param coin the coin that must be made known
* @return database transaction status, non-negative on success
*/
enum TALER_EXCHANGEDB_CoinKnownStatus
{
/**
* The coin was successfully added.
*/
TALER_EXCHANGEDB_CKS_ADDED = 1,
/**
* The coin was already present.
*/
TALER_EXCHANGEDB_CKS_PRESENT = 0,
/**
* Serialization failure.
*/
TALER_EXCHANGEDB_CKS_SOFT_FAIL = -1,
/**
* Hard database failure.
*/
TALER_EXCHANGEDB_CKS_HARD_FAIL = -2,
/**
* Conflicting coin (different denomination key) already in database.
*/
TALER_EXCHANGEDB_CKS_CONFLICT = -3,
}
(*ensure_coin_known)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_CoinPublicInfo *coin);
/**
* Retrieve information about the given @a coin from the database.
*
* @param cls database connection plugin state
* @param session database session
* @param coin the coin that must be made known
* @return database transaction status, non-negative on success
*/
enum GNUNET_DB_QueryStatus
(*get_known_coin)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
struct TALER_CoinPublicInfo *coin_info);
/**
* Retrieve the denomination of a known coin.
*
* @param cls the plugin closure
* @param session the database session handle
* @param coin_pub the public key of the coin to search for
* @param[out] denom_hash where to store the hash of the coins denomination
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*get_coin_denomination)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
struct GNUNET_HashCode *denom_hash);
/**
* Check if we have the specified deposit already in the database.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database connection
* @param deposit deposit to search for
* @param check_extras whether to check extra fields or not
* @param[out] deposit_fee set to the deposit fee the exchange charged
* @param[out] exchange_timestamp set to the time when the exchange received the deposit
* @return 1 if we know this operation,
* 0 if this exact deposit is unknown to us,
* otherwise transaction error status
*/
enum GNUNET_DB_QueryStatus
(*have_deposit)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_EXCHANGEDB_Deposit *deposit,
int check_extras,
struct TALER_Amount *deposit_fee,
struct GNUNET_TIME_Absolute *exchange_timestamp);
/**
* Insert information about deposited coin into the database.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to the database
* @param exchange_timestamp time the exchange received the deposit request
* @param deposit deposit information to store
* @return query result status
*/
enum GNUNET_DB_QueryStatus
(*insert_deposit)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
struct GNUNET_TIME_Absolute exchange_timestamp,
const struct TALER_EXCHANGEDB_Deposit *deposit);
/**
* Insert information about refunded coin into the database.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to the database
* @param refund refund information to store
* @return query result status
*/
enum GNUNET_DB_QueryStatus
(*insert_refund)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_EXCHANGEDB_Refund *refund);
/**
* Select refunds by @a coin_pub, @a merchant_pub and @a h_contract.
*
* @param cls closure of plugin
* @param session database handle to use
* @param coin_pub coin to get refunds for
* @param merchant_pub merchant to get refunds for
* @param h_contract_pub contract (hash) to get refunds for
* @param cb function to call for each refund found
* @param cb_cls closure for @a cb
* @return query result status
*/
enum GNUNET_DB_QueryStatus
(*select_refunds_by_coin)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct GNUNET_HashCode *h_contract,
TALER_EXCHANGEDB_RefundCoinCallback cb,
void *cb_cls);
/**
* Mark a deposit as tiny, thereby declaring that it cannot be executed by
* itself (only included in a larger aggregation) and should no longer be
* returned by @e iterate_ready_deposits()
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to the database
* @param deposit_rowid identifies the deposit row to modify
* @return query result status
*/
enum GNUNET_DB_QueryStatus
(*mark_deposit_tiny)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t rowid);
/**
* Test if a deposit was marked as done, thereby declaring that it
* cannot be refunded anymore.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to the database
* @param coin_pub the coin to check for deposit
* @param merchant_pub merchant to receive the deposit
* @param h_contract_terms contract terms of the deposit
* @param h_wire hash of the merchant's wire details
* @return #GNUNET_DB_STATUS_SUCCESS_ONE_RESULT if is is marked done,
* #GNUNET_DB_STATUS_SUCCESS_NO_RESULTS if not,
* otherwise transaction error status (incl. deposit unknown)
*/
enum GNUNET_DB_QueryStatus
(*test_deposit_done)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct GNUNET_HashCode *h_contract_terms,
const struct GNUNET_HashCode *h_wire);
/**
* Mark a deposit as done, thereby declaring that it cannot be
* executed at all anymore, and should no longer be returned by
* @e iterate_ready_deposits() or @e iterate_matching_deposits().
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to the database
* @param deposit_rowid identifies the deposit row to modify
* @return query result status
*/
enum GNUNET_DB_QueryStatus
(*mark_deposit_done)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t rowid);
/**
* Obtain information about deposits that are ready to be executed.
* Such deposits must not be marked as "tiny" or "done", and the
* execution time and refund deadlines must both be in the past.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to the database
* @param deposit_cb function to call for ONE such deposit
* @param deposit_cb_cls closure for @a deposit_cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*get_ready_deposit)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
TALER_EXCHANGEDB_DepositIterator deposit_cb,
void *deposit_cb_cls);
/**
* Maximum number of results we return from iterate_matching_deposits().
*
* Limit on the number of transactions we aggregate at once. Note
* that the limit must be big enough to ensure that when transactions
* of the smallest possible unit are aggregated, they do surpass the
* "tiny" threshold beyond which we never trigger a wire transaction!
*/
#define TALER_EXCHANGEDB_MATCHING_DEPOSITS_LIMIT 10000
/**
* Obtain information about other pending deposits for the same
* destination. Those deposits must not already be "done".
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to the database
* @param h_wire destination of the wire transfer
* @param merchant_pub public key of the merchant
* @param deposit_cb function to call for each deposit
* @param deposit_cb_cls closure for @a deposit_cb
* @param limit maximum number of matching deposits to return; should
* be #TALER_EXCHANGEDB_MATCHING_DEPOSITS_LIMIT, larger values
* are not supported, smaller values would be inefficient.
* @return number of rows processed, 0 if none exist,
* transaction status code on error
*/
enum GNUNET_DB_QueryStatus
(*iterate_matching_deposits)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *h_wire,
const struct TALER_MerchantPublicKeyP *merchant_pub,
TALER_EXCHANGEDB_MatchingDepositIterator deposit_cb,
void *deposit_cb_cls,
uint32_t limit);
/**
* Store new melt commitment data.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database handle to use
* @param refresh_session operational data to store
* @return query status for the transaction
*/
enum GNUNET_DB_QueryStatus
(*insert_melt)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_EXCHANGEDB_Refresh *refresh_session);
/**
* Lookup melt commitment data under the given @a rc.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database handle to use
* @param rc commitment to use for the lookup
* @param[out] melt where to store the result; note that
* melt->session.coin.denom_sig will be set to NULL
* and is not fetched by this routine (as it is not needed by the client)
* @return transaction status
*/
enum GNUNET_DB_QueryStatus
(*get_melt)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_RefreshCommitmentP *rc,
struct TALER_EXCHANGEDB_Melt *melt);
/**
* Lookup noreveal index of a previous melt operation under the given
* @a rc.
*
* @param cls the `struct PostgresClosure` with the plugin-specific state
* @param session database handle to use
* @param rc commitment hash to use to locate the operation
* @param[out] noreveal_index returns the "gamma" value selected by the
* exchange which is the index of the transfer key that is
* not to be revealed to the exchange
* @return transaction status
*/
enum GNUNET_DB_QueryStatus
(*get_melt_index)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_RefreshCommitmentP *rc,
uint32_t *noreveal_index);
/**
* Store in the database which coin(s) the wallet wanted to create
* in a given refresh operation and all of the other information
* we learned or created in the reveal step.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database connection
* @param rc identify commitment and thus refresh operation
* @param num_rrcs number of coins to generate, size of the @a rrcs array
* @param rrcs information about the new coins
* @param num_tprivs number of entries in @a tprivs, should be #TALER_CNC_KAPPA - 1
* @param tprivs transfer private keys to store
* @param tp public key to store
* @return query status for the transaction
*/
enum GNUNET_DB_QueryStatus
(*insert_refresh_reveal)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_RefreshCommitmentP *rc,
uint32_t num_rrcs,
const struct TALER_EXCHANGEDB_RefreshRevealedCoin *rrcs,
unsigned int num_tprivs,
const struct TALER_TransferPrivateKeyP *tprivs,
const struct TALER_TransferPublicKeyP *tp);
/**
* Lookup in the database for the @a num_freshcoins coins that we
* created in the given refresh operation.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database connection
* @param rc identify commitment and thus refresh operation
* @param cb function to call with the results
* @param cb_cls closure for @a cb
* @return transaction status
*/
enum GNUNET_DB_QueryStatus
(*get_refresh_reveal)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_RefreshCommitmentP *rc,
TALER_EXCHANGEDB_RefreshCallback cb,
void *cb_cls);
/**
* Obtain shared secret and transfer public key from the public key of
* the coin. This information and the link information returned by
* @e get_link_data_list() enable the owner of an old coin to determine
* the private keys of the new coins after the melt.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database connection
* @param coin_pub public key of the coin
* @param ldc function to call for each session the coin was melted into
* @param ldc_cls closure for @a tdc
* @return statement execution status
*/
enum GNUNET_DB_QueryStatus
(*get_link_data)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
TALER_EXCHANGEDB_LinkCallback ldc,
void *tdc_cls);
/**
* Compile a list of all (historic) transactions performed
* with the given coin (melt, refund, recoup and deposit operations).
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database connection
* @param coin_pub coin to investigate
* @param include_recoup include recoup transactions of the coin?
* @param[out] tlp set to list of transactions, NULL if coin is fresh
* @return database transaction status
*/
enum GNUNET_DB_QueryStatus
(*get_coin_transactions)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
int include_recoup,
struct TALER_EXCHANGEDB_TransactionList **tlp);
/**
* Free linked list of transactions.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param list list to free
*/
void
(*free_coin_transaction_list) (void *cls,
struct TALER_EXCHANGEDB_TransactionList *list);
/**
* Lookup the list of Taler transactions that was aggregated
* into a wire transfer by the respective @a raw_wtid.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session database connection
* @param wtid the raw wire transfer identifier we used
* @param cb function to call on each transaction found
* @param cb_cls closure for @a cb
* @return query status of the transaction
*/
enum GNUNET_DB_QueryStatus
(*lookup_wire_transfer)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_WireTransferIdentifierRawP *wtid,
TALER_EXCHANGEDB_AggregationDataCallback cb,
void *cb_cls);
/**
* Try to find the wire transfer details for a deposit operation.
* If we did not execute the deposit yet, return when it is supposed
* to be executed.
*
* @param cls closure
* @param session database connection
* @param h_contract_terms hash of the proposal data
* @param h_wire hash of merchant wire details
* @param coin_pub public key of deposited coin
* @param merchant_pub merchant public key
* @param cb function to call with the result
* @param cb_cls closure to pass to @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*lookup_transfer_by_deposit)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *h_contract_terms,
const struct GNUNET_HashCode *h_wire,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_MerchantPublicKeyP *merchant_pub,
TALER_EXCHANGEDB_WireTransferByCoinCallback cb,
void *cb_cls);
/**
* Function called to insert aggregation information into the DB.
*
* @param cls closure
* @param session database connection
* @param wtid the raw wire transfer identifier we used
* @param deposit_serial_id row in the deposits table for which this is aggregation data
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*insert_aggregation_tracking)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_WireTransferIdentifierRawP *wtid,
unsigned long long deposit_serial_id);
/**
* Insert wire transfer fee into database.
*
* @param cls closure
* @param session database connection
* @param wire_method which wire method is the fee about?
* @param start_date when does the fee go into effect
* @param end_date when does the fee end being valid
* @param wire_fee how high is the wire transfer fee
* @param closing_fee how high is the closing fee
* @param master_sig signature over the above by the exchange master key
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*insert_wire_fee)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *wire_method,
struct GNUNET_TIME_Absolute start_date,
struct GNUNET_TIME_Absolute end_date,
const struct TALER_Amount *wire_fee,
const struct TALER_Amount *closing_fee,
const struct TALER_MasterSignatureP *master_sig);
/**
* Obtain wire fee from database.
*
* @param cls closure
* @param session database connection
* @param type type of wire transfer the fee applies for
* @param date for which date do we want the fee?
* @param[out] start_date when does the fee go into effect
* @param[out] end_date when does the fee end being valid
* @param[out] wire_fee how high is the wire transfer fee
* @param[out] closing_fee how high is the closing fee
* @param[out] master_sig signature over the above by the exchange master key
* @return query status of the transaction
*/
enum GNUNET_DB_QueryStatus
(*get_wire_fee)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *type,
struct GNUNET_TIME_Absolute date,
struct GNUNET_TIME_Absolute *start_date,
struct GNUNET_TIME_Absolute *end_date,
struct TALER_Amount *wire_fee,
struct TALER_Amount *closing_fee,
struct TALER_MasterSignatureP *master_sig);
/**
* Obtain information about expired reserves and their
* remaining balances.
*
* @param cls closure of the plugin
* @param session database connection
* @param now timestamp based on which we decide expiration
* @param rec function to call on expired reserves
* @param rec_cls closure for @a rec
* @return transaction status
*/
enum GNUNET_DB_QueryStatus
(*get_expired_reserves)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
struct GNUNET_TIME_Absolute now,
TALER_EXCHANGEDB_ReserveExpiredCallback rec,
void *rec_cls);
/**
* Insert reserve close operation into database.
*
* @param cls closure
* @param session database connection
* @param reserve_pub which reserve is this about?
* @param execution_date when did we perform the transfer?
* @param receiver_account to which account do we transfer, in payto://-format
* @param wtid identifier for the wire transfer
* @param amount_with_fee amount we charged to the reserve
* @param closing_fee how high is the closing fee
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*insert_reserve_closed)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_ReservePublicKeyP *reserve_pub,
struct GNUNET_TIME_Absolute execution_date,
const char *receiver_account,
const struct TALER_WireTransferIdentifierRawP *wtid,
const struct TALER_Amount *amount_with_fee,
const struct TALER_Amount *closing_fee);
/**
* Function called to insert wire transfer commit data into the DB.
*
* @param cls closure
* @param session database connection
* @param type type of the wire transfer (i.e. "iban")
* @param buf buffer with wire transfer preparation data
* @param buf_size number of bytes in @a buf
* @return query status code
*/
enum GNUNET_DB_QueryStatus
(*wire_prepare_data_insert)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *type,
const char *buf,
size_t buf_size);
/**
* Function called to mark wire transfer commit data as finished.
*
* @param cls closure
* @param session database connection
* @param rowid which entry to mark as finished
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*wire_prepare_data_mark_finished)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t rowid);
/**
* Function called to mark wire transfer as failed.
*
* @param cls closure
* @param session database connection
* @param rowid which entry to mark as failed
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*wire_prepare_data_mark_failed)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t rowid);
/**
* Function called to get an unfinished wire transfer
* preparation data. Fetches at most one item.
*
* @param cls closure
* @param session database connection
* @param cb function to call for ONE unfinished item
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*wire_prepare_data_get)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
TALER_EXCHANGEDB_WirePreparationIterator cb,
void *cb_cls);
/**
* Start a transaction where we transiently violate the foreign
* constraints on the "wire_out" table as we insert aggregations
* and only add the wire transfer out at the end.
*
* @param cls the @e cls of this struct with the plugin-specific state
* @param session connection to use
* @return #GNUNET_OK on success
*/
int
(*start_deferred_wire_out) (void *cls,
struct TALER_EXCHANGEDB_Session *session);
/**
* Store information about an outgoing wire transfer that was executed.
*
* @param cls closure
* @param session database connection
* @param date time of the wire transfer
* @param wtid subject of the wire transfer
* @param wire_account details about the receiver account of the wire transfer,
* including 'url' in payto://-format
* @param amount amount that was transmitted
* @param exchange_account_section configuration section of the exchange specifying the
* exchange's bank account being used
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*store_wire_transfer_out)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
struct GNUNET_TIME_Absolute date,
const struct TALER_WireTransferIdentifierRawP *wtid,
const json_t *wire_account,
const char *exchange_account_section,
const struct TALER_Amount *amount);
/**
* Function called to perform "garbage collection" on the
* database, expiring records we no longer require.
*
* @param cls closure
* @return #GNUNET_OK on success,
* #GNUNET_SYSERR on DB errors
*/
int
(*gc) (void *cls);
/**
* Select deposits above @a serial_id in monotonically increasing
* order.
*
* @param cls closure
* @param session database connection
* @param serial_id highest serial ID to exclude (select strictly larger)
* @param cb function to call on each result
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_deposits_above_serial_id)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t serial_id,
TALER_EXCHANGEDB_DepositCallback cb,
void *cb_cls);
/**
* Select refresh sessions above @a serial_id in monotonically increasing
* order.
*
* @param cls closure
* @param session database connection
* @param serial_id highest serial ID to exclude (select strictly larger)
* @param cb function to call on each result
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_refreshes_above_serial_id)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t serial_id,
TALER_EXCHANGEDB_RefreshesCallback cb,
void *cb_cls);
/**
* Select refunds above @a serial_id in monotonically increasing
* order.
*
* @param cls closure
* @param session database connection
* @param serial_id highest serial ID to exclude (select strictly larger)
* @param cb function to call on each result
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_refunds_above_serial_id)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t serial_id,
TALER_EXCHANGEDB_RefundCallback cb,
void *cb_cls);
/**
* Select inbound wire transfers into reserves_in above @a serial_id
* in monotonically increasing order.
*
* @param cls closure
* @param session database connection
* @param serial_id highest serial ID to exclude (select strictly larger)
* @param cb function to call on each result
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_reserves_in_above_serial_id)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t serial_id,
TALER_EXCHANGEDB_ReserveInCallback cb,
void *cb_cls);
/**
* Select inbound wire transfers into reserves_in above @a serial_id
* in monotonically increasing order by @a account_name.
*
* @param cls closure
* @param session database connection
* @param account_name name of the account for which we do the selection
* @param serial_id highest serial ID to exclude (select strictly larger)
* @param cb function to call on each result
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_reserves_in_above_serial_id_by_account)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *account_name,
uint64_t serial_id,
TALER_EXCHANGEDB_ReserveInCallback cb,
void *cb_cls);
/**
* Select withdraw operations from reserves_out above @a serial_id
* in monotonically increasing order.
*
* @param cls closure
* @param session database connection
* @param account_name name of the account for which we do the selection
* @param serial_id highest serial ID to exclude (select strictly larger)
* @param cb function to call on each result
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_withdrawals_above_serial_id)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t serial_id,
TALER_EXCHANGEDB_WithdrawCallback cb,
void *cb_cls);
/**
* Function called to select outgoing wire transfers the exchange
* executed, ordered by serial ID (monotonically increasing).
*
* @param cls closure
* @param session database connection
* @param serial_id lowest serial ID to include (select larger or equal)
* @param cb function to call for ONE unfinished item
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_wire_out_above_serial_id)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t serial_id,
TALER_EXCHANGEDB_WireTransferOutCallback cb,
void *cb_cls);
/**
* Function called to select outgoing wire transfers the exchange
* executed, ordered by serial ID (monotonically increasing).
*
* @param cls closure
* @param session database connection
* @param account_name name to select by
* @param serial_id lowest serial ID to include (select larger or equal)
* @param cb function to call for ONE unfinished item
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_wire_out_above_serial_id_by_account)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *account_name,
uint64_t serial_id,
TALER_EXCHANGEDB_WireTransferOutCallback cb,
void *cb_cls);
/**
* Function called to select recoup requests the exchange
* received, ordered by serial ID (monotonically increasing).
*
* @param cls closure
* @param session database connection
* @param serial_id lowest serial ID to include (select larger or equal)
* @param cb function to call for ONE unfinished item
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_recoup_above_serial_id)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t serial_id,
TALER_EXCHANGEDB_RecoupCallback cb,
void *cb_cls);
/**
* Function called to select recoup requests the exchange received for
* refreshed coins, ordered by serial ID (monotonically increasing).
*
* @param cls closure
* @param session database connection
* @param serial_id lowest serial ID to include (select larger or equal)
* @param cb function to call for ONE unfinished item
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_recoup_refresh_above_serial_id)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t serial_id,
TALER_EXCHANGEDB_RecoupRefreshCallback cb,
void *cb_cls);
/**
* Function called to select reserve close operations the aggregator
* triggered, ordered by serial ID (monotonically increasing).
*
* @param cls closure
* @param session database connection
* @param serial_id lowest serial ID to include (select larger or equal)
* @param cb function to call
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_reserve_closed_above_serial_id)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
uint64_t serial_id,
TALER_EXCHANGEDB_ReserveClosedCallback cb,
void *cb_cls);
/**
* Function called to add a request for an emergency recoup for a
* coin. The funds are to be added back to the reserve.
*
* @param cls closure
* @param session database connection
* @param reserve_pub public key of the reserve that is being refunded
* @param coin public information about a coin
* @param coin_sig signature of the coin of type #TALER_SIGNATURE_WALLET_COIN_RECOUP
* @param coin_blind blinding key of the coin
* @param h_blind_ev blinded envelope, as calculated by the exchange
* @param amount total amount to be paid back
* @param h_blind_ev hash of the blinded coin's envelope (must match reserves_out entry)
* @param timestamp the timestamp to store
* @return transaction result status
*/
enum GNUNET_DB_QueryStatus
(*insert_recoup_request)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_CoinPublicInfo *coin,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_DenominationBlindingKeyP *coin_blind,
const struct TALER_Amount *amount,
const struct GNUNET_HashCode *h_blind_ev,
struct GNUNET_TIME_Absolute timestamp);
/**
* Function called to add a request for an emergency recoup for a
* refreshed coin. The funds are to be added back to the original coin.
*
* @param cls closure
* @param session database connection
* @param coin public information about the refreshed coin
* @param coin_sig signature of the coin of type #TALER_SIGNATURE_WALLET_COIN_RECOUP
* @param coin_blind blinding key of the coin
* @param h_blind_ev blinded envelope, as calculated by the exchange
* @param amount total amount to be paid back
* @param h_blind_ev hash of the blinded coin's envelope (must match reserves_out entry)
* @param timestamp a timestamp to store
* @return transaction result status
*/
enum GNUNET_DB_QueryStatus
(*insert_recoup_refresh_request)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_CoinPublicInfo *coin,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_DenominationBlindingKeyP *coin_blind,
const struct TALER_Amount *amount,
const struct GNUNET_HashCode *h_blind_ev,
struct GNUNET_TIME_Absolute timestamp);
/**
* Obtain information about which reserve a coin was generated
* from given the hash of the blinded coin.
*
* @param cls closure
* @param session a session
* @param h_blind_ev hash of the blinded coin
* @param[out] reserve_pub set to information about the reserve (on success only)
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*get_reserve_by_h_blind)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *h_blind_ev,
struct TALER_ReservePublicKeyP *reserve_pub);
/**
* Obtain information about which old coin a coin was refreshed
* given the hash of the blinded (fresh) coin.
*
* @param cls closure
* @param session a session
* @param h_blind_ev hash of the blinded coin
* @param[out] old_coin_pub set to information about the old coin (on success only)
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*get_old_coin_by_h_blind)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *h_blind_ev,
struct TALER_CoinSpendPublicKeyP *old_coin_pub);
/**
* Store information that a denomination key was revoked
* in the database.
*
* @param cls closure
* @param session a session
* @param denom_pub_hash hash of the revoked denomination key
* @param master_sig signature affirming the revocation
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*insert_denomination_revocation)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *denom_pub_hash,
const struct TALER_MasterSignatureP *master_sig);
/**
* Obtain information about a denomination key's revocation from
* the database.
*
* @param cls closure
* @param session a session
* @param denom_pub_hash hash of the revoked denomination key
* @param[out] master_sig signature affirming the revocation
* @param[out] rowid row where the information is stored
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*get_denomination_revocation)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *denom_pub_hash,
struct TALER_MasterSignatureP *master_sig,
uint64_t *rowid);
/**
* Select all of those deposits in the database for which we do
* not have a wire transfer (or a refund) and which should have
* been deposited between @a start_date and @a end_date.
*
* @param cls closure
* @param session a session
* @param start_date lower bound on the requested wire execution date
* @param end_date upper bound on the requested wire execution date
* @param cb function to call on all such deposits
* @param cb_cls closure for @a cb
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*select_deposits_missing_wire)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
struct GNUNET_TIME_Absolute start_date,
struct GNUNET_TIME_Absolute end_date,
TALER_EXCHANGEDB_WireMissingCallback cb,
void *cb_cls);
/**
* Check the last date an auditor was modified.
*
* @param cls closure
* @param session a session
* @param auditor_pub key to look up information for
* @param[out] last_date last modification date to auditor status
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*lookup_auditor_timestamp)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_AuditorPublicKeyP *auditor_pub,
struct GNUNET_TIME_Absolute *last_date);
/**
* Lookup current state of an auditor.
*
* @param cls closure
* @param session a session
* @param auditor_pub key to look up information for
* @param[out] auditor_url set to the base URL of the auditor's REST API; memory to be
* released by the caller!
* @param[out] enabled set if the auditor is currently in use
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*lookup_auditor_status)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_AuditorPublicKeyP *auditor_pub,
char **auditor_url,
bool *enabled);
/**
* Insert information about an auditor that will audit this exchange.
*
* @param cls closure
* @param session a session
* @param auditor_pub key of the auditor
* @param auditor_url base URL of the auditor's REST service
* @param auditor_name name of the auditor (for humans)
* @param start_date date when the auditor was added by the offline system
* (only to be used for replay detection)
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*insert_auditor)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_AuditorPublicKeyP *auditor_pub,
const char *auditor_url,
const char *auditor_name,
struct GNUNET_TIME_Absolute start_date);
/**
* Update information about an auditor that will audit this exchange.
*
* @param cls closure
* @param session a session
* @param auditor_pub key of the auditor (primary key for the existing record)
* @param auditor_url base URL of the auditor's REST service, to be updated
* @param auditor_name name of the auditor (for humans)
* @param change_date date when the auditor status was last changed
* (only to be used for replay detection)
* @param enabled true to enable, false to disable
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*update_auditor)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_AuditorPublicKeyP *auditor_pub,
const char *auditor_url,
const char *auditor_name,
struct GNUNET_TIME_Absolute change_date,
bool enabled);
/**
* Check the last date an exchange wire account was modified.
*
* @param cls closure
* @param session a session
* @param payto_uri key to look up information for
* @param[out] last_date last modification date to auditor status
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*lookup_wire_timestamp)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *payto_uri,
struct GNUNET_TIME_Absolute *last_date);
/**
* Insert information about an wire account used by this exchange.
*
* @param cls closure
* @param session a session
* @param payto_uri wire account of the exchange
* @param start_date date when the account was added by the offline system
* (only to be used for replay detection)
* @param master_sig public signature affirming the existence of the account,
* must be of purpose #TALER_SIGNATURE_MASTER_WIRE_DETAILS
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*insert_wire)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *payto_uri,
struct GNUNET_TIME_Absolute start_date,
const struct TALER_MasterSignatureP *master_sig);
/**
* Update information about a wire account of the exchange.
*
* @param cls closure
* @param session a session
* @param payto_uri account the update is about
* @param change_date date when the account status was last changed
* (only to be used for replay detection)
* @param enabled true to enable, false to disable (the actual change)
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*update_wire)(void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *payto_uri,
struct GNUNET_TIME_Absolute change_date,
bool enabled);
/**
* Store information about a revoked online signing key.
*
* @param cls closure
* @param session a session (can be NULL)
* @param exchange_pub exchange online signing key that was revoked
* @param master_sig signature affirming the revocation
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*insert_signkey_revocation)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct TALER_ExchangePublicKeyP *exchange_pub,
const struct TALER_MasterSignatureP *master_sig);
/**
* Lookup information about a future denomination key.
*
* @param cls closure
* @param session a session
* @param h_denom_pub hash of the denomination public key
* @param[out] meta set to various meta data about the key
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*lookup_future_denomination_key)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *h_denom_pub,
struct TALER_EXCHANGEDB_DenominationKeyMetaData *meta);
/**
* Lookup information about current denomination key.
*
* @param cls closure
* @param session a session
* @param h_denom_pub hash of the denomination public key
* @param[out] meta set to various meta data about the key
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*lookup_denomination_key)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *h_denom_pub,
struct TALER_EXCHANGEDB_DenominationKeyMetaData *meta);
/**
* Activate future denomination key, turning it into a "current" or "valid"
* denomination key by adding the master signature. Deletes the
* denomination key from the 'future' table an inserts the data into the
* main denominations table. Because this function will trigger multiple SQL
* statements, it must be run within a transaction.
*
* @param cls closure
* @param session a session
* @param h_denom_pub hash of the denomination public key
* @param master_pub master public key used for @a master_sig
* @param master_sig master signature to add
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*activate_denomination_key)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *h_denom_pub,
const struct TALER_MasterPublicKeyP *master_pub,
const struct TALER_MasterSignatureP *master_sig);
/**
* Insert information about an auditor auditing a denomination key.
*
* @param cls closure
* @param session a session
* @param h_denom_pub the audited denomination
* @param auditor_pub the auditor's key
* @param auditor_sig signature affirming the auditor's audit activity
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*insert_auditor_denom_sig)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const struct GNUNET_HashCode *h_denom_pub,
const struct TALER_AuditorPublicKeyP *auditor_pub,
const struct TALER_AuditorSignatureP *auditor_sig);
/**
* Lookup information about known wire fees.
*
* @param cls closure
* @param session a session
* @param wire_method the wire method to lookup fees for
* @param start_time starting time of fee
* @param end_time end time of fee
* @param[out] wire_fee wire fee for that time period; if
* different wire fee exists within this time
* period, an 'invalid' amount is returned.
* @param[out] closing_fee wire fee for that time period; if
* different wire fee exists within this time
* period, an 'invalid' amount is returned.
* @return transaction status code
*/
enum GNUNET_DB_QueryStatus
(*lookup_wire_fee_by_time)(
void *cls,
struct TALER_EXCHANGEDB_Session *session,
const char *wire_method,
struct GNUNET_TIME_Absolute start_time,
struct GNUNET_TIME_Absolute end_time,
struct TALER_Amount *wire_fee,
struct TALER_Amount *closing_fee);
};
#endif /* _TALER_EXCHANGE_DB_H */