975 lines
26 KiB
C
975 lines
26 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2014, 2015 Christian Grothoff (and other contributing authors)
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file mint/mint_db.h
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* @brief Low-level (statement-level) database access for the mint
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* @author Florian Dold
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* @author Christian Grothoff
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*/
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#ifndef MINT_DB_H
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#define MINT_DB_H
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#include <libpq-fe.h>
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#include <microhttpd.h>
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#include <gnunet/gnunet_util_lib.h>
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#include "taler_util.h"
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#define TALER_TEMP_SCHEMA_NAME "taler_temporary"
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/**
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* Initialize database subsystem.
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*
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* @param connection_cfg configuration for the DB
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* @return #GNUNET_OK on success
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*/
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int
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TALER_MINT_DB_init (const char *connection_cfg);
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/**
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* Get the thread-local database-handle.
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* Connect to the db if the connection does not exist yet.
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*
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* @param temporary #GNUNET_YES to use a temporary schema; #GNUNET_NO to use the
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* database default one
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* @param the database connection, or NULL on error
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*/
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PGconn *
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TALER_MINT_DB_get_connection (int temporary);
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/**
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* Drop the temporary taler schema. This is only useful for testcases
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*
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* @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
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*/
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int
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TALER_MINT_DB_drop_temporary (PGconn *db);
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/**
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* Create the necessary tables if they are not present
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*
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* @param temporary should we use a temporary schema
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* @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
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*/
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int
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TALER_MINT_DB_create_tables (int temporary);
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/**
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* Setup prepared statements. FIXME: should this be part of the API,
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* or just internal to "TALER_MINT_DB_get_connection()"?
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*
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* @param db_conn connection handle to initialize
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* @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
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*/
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int
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TALER_MINT_DB_prepare (PGconn *db_conn);
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/**
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* Start a transaction.
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*
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* @param db_conn connection to use
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* @return #GNUNET_OK on success
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*/
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int
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TALER_MINT_DB_transaction (PGconn *db_conn);
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/**
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* Commit a transaction.
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*
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* @param db_conn connection to use
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* @return #GNUNET_OK on success
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*/
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int
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TALER_MINT_DB_commit (PGconn *db_conn);
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/**
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* Abort/rollback a transaction.
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*
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* @param db_conn connection to use
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*/
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void
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TALER_MINT_DB_rollback (PGconn *db_conn);
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/**
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* Information we keep on a bank transfer that
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* established a reserve.
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*/
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struct BankTransfer
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{
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/**
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* Public key of the reserve that was filled.
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*/
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struct GNUNET_CRYPTO_EddsaPublicKey reserve_pub;
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/**
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* Amount that was transferred to the mint.
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*/
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struct TALER_Amount amount;
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/**
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* Detailed wire information about the transaction.
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*/
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const json_t *wire;
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};
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/* FIXME: add functions to add bank transfers to our DB
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(and to test if we already did add one) (#3633) */
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/**
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* A summary of a Reserve
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*/
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struct Reserve
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{
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/**
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* The reserve's public key. This uniquely identifies the reserve
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*/
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struct GNUNET_CRYPTO_EddsaPublicKey *pub;
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/**
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* The balance amount existing in the reserve
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*/
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struct TALER_Amount balance;
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/**
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* The expiration date of this reserve
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*/
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struct GNUNET_TIME_Absolute expiry;
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};
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/**
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* Information we keep for a withdrawn coin to reproduce
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* the /withdraw operation if needed, and to have proof
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* that a reserve was drained by this amount.
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*/
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struct CollectableBlindcoin
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{
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/**
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* Our signature over the (blinded) coin.
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*/
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struct GNUNET_CRYPTO_rsa_Signature *sig;
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/**
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* Denomination key (which coin was generated).
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*/
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struct GNUNET_CRYPTO_rsa_PublicKey *denom_pub;
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/**
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* Public key of the reserve that was drained.
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*/
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struct GNUNET_CRYPTO_EddsaPublicKey reserve_pub;
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/**
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* Hash over the blinded message, needed to verify
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* the @e reserve_sig.
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*/
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struct GNUNET_HashCode h_coin_envelope;
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/**
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* Signature confirming the withdrawl, matching @e reserve_pub,
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* @e denom_pub and @e h_coin_envelope.
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*/
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struct GNUNET_CRYPTO_EddsaSignature reserve_sig;
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};
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/**
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* Get the summary of a reserve.
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*
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* @param db the database connection handle
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* @param reserve the reserve data. The public key of the reserve should be set
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* in this structure; it is used to query the database. The balance
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* and expiration are then filled accordingly.
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* @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
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*/
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int
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TALER_MINT_DB_reserve_get (PGconn *db,
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struct Reserve *reserve);
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/**
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* Insert a incoming transaction into reserves. New reserves are also created
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* through this function.
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*
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* @param db the database connection handle
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* @param reserve the reserve structure. The public key of the reserve should
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* be set here. Upon successful execution of this function, the
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* balance and expiration of the reserve will be updated.
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* @param balance the amount that has to be added to the reserve
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* @param expiry the new expiration time for the reserve
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* @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failures
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*/
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int
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TALER_MINT_DB_reserves_in_insert (PGconn *db,
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struct Reserve *reserve,
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const struct TALER_Amount balance,
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const struct GNUNET_TIME_Absolute expiry);
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/**
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* Locate the response for a /withdraw request under the
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* key of the hash of the blinded message.
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*
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* @param db_conn database connection to use
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* @param h_blind hash of the blinded message
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* @param collectable corresponding collectable coin (blind signature)
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* if a coin is found
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* @return #GNUNET_SYSERR on internal error
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* #GNUNET_NO if the collectable was not found
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* #GNUNET_YES on success
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*/
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int
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TALER_MINT_DB_get_collectable_blindcoin (PGconn *db_conn,
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const struct GNUNET_HashCode *h_blind,
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struct CollectableBlindcoin *collectable);
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/**
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* Store collectable bit coin under the corresponding
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* hash of the blinded message.
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*
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* @param db_conn database connection to use
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* @param h_blind hash of the blinded message
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* @param collectable corresponding collectable coin (blind signature)
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* if a coin is found
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* @return #GNUNET_SYSERR on internal error
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* #GNUNET_NO if the collectable was not found
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* #GNUNET_YES on success
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*/
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int
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TALER_MINT_DB_insert_collectable_blindcoin (PGconn *db_conn,
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const struct GNUNET_HashCode *h_blind,
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const struct CollectableBlindcoin *collectable);
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/**
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* Types of operations on a reserved.
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*/
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enum TALER_MINT_DB_ReserveOperation
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{
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/**
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* Money was deposited into the reserve via a bank transfer.
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*/
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TALER_MINT_DB_RO_BANK_TO_MINT = 0,
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/**
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* A Coin was withdrawn from the reserve using /withdraw.
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*/
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TALER_MINT_DB_RO_WITHDRAW_COIN = 1
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};
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/**
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* Reserve history as a linked list. Lists all of the transactions
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* associated with this reserve (such as the bank transfers that
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* established the reserve and all /withdraw operations we have done
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* since).
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*/
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struct ReserveHistory
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{
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/**
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* Next entry in the reserve history.
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*/
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struct ReserveHistory *next;
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/**
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* Type of the event, determins @e details.
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*/
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enum TALER_MINT_DB_ReserveOperation type;
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/**
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* Details of the operation, depending on @e type.
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*/
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union
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{
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/**
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* Details about a bank transfer to the mint.
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*/
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struct BankTransfer *bank;
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/**
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* Details about a /withdraw operation.
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*/
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struct CollectableBlindcoin *withdraw;
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} details;
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};
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/**
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* Get all of the transaction history associated with the specified
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* reserve.
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*
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* @param db_conn connection to use
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* @param reserve_pub public key of the reserve
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* @return known transaction history (NULL if reserve is unknown)
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*/
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struct ReserveHistory *
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TALER_MINT_DB_get_reserve_history (PGconn *db_conn,
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const struct GNUNET_CRYPTO_EddsaPublicKey *reserve_pub);
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/**
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* Free memory associated with the given reserve history.
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*
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* @param rh history to free.
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*/
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void
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TALER_MINT_DB_free_reserve_history (struct ReserveHistory *rh);
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/**
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* Specification for a /deposit operation.
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*/
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struct Deposit
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{
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/**
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* Information about the coin that is being deposited.
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*/
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struct TALER_CoinPublicInfo coin;
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/**
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* ECDSA signature affirming that the customer intends
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* this coin to be deposited at the merchant identified
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* by @e h_wire in relation to the contract identified
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* by @e h_contract.
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*/
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struct GNUNET_CRYPTO_EcdsaSignature csig;
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/**
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* Public key of the merchant. Enables later identification
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* of the merchant in case of a need to rollback transactions.
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*/
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struct GNUNET_CRYPTO_EddsaPublicKey merchant_pub;
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/**
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* Hash over the contract between merchant and customer
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* (remains unknown to the Mint).
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*/
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struct GNUNET_HashCode h_contract;
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/**
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* Hash of the (canonical) representation of @e wire, used
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* to check the signature on the request. Generated by
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* the mint from the detailed wire data provided by the
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* merchant.
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*/
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struct GNUNET_HashCode h_wire;
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/**
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* Detailed wire information for executing the transaction.
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*/
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const json_t *wire;
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/**
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* Merchant-generated transaction ID to detect duplicate
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* transactions.
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*/
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uint64_t transaction_id;
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/**
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* Fraction of the coin's remaining value to be deposited.
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* The coin is identified by @e coin_pub.
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*/
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struct TALER_Amount amount;
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};
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/**
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* Check if we have the specified deposit already in the database.
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*
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* @param db_conn database connection
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* @param deposit deposit to search for
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* @return #GNUNET_YES if we know this operation,
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* #GNUNET_NO if this deposit is unknown to us,
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* #GNUNET_SYSERR on internal error
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*/
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int
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TALER_MINT_DB_have_deposit (PGconn *db_conn,
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const struct Deposit *deposit);
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/**
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* Insert information about deposited coin into the
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* database.
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*
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* @param db_conn connection to the database
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* @param deposit deposit information to store
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* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
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*/
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int
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TALER_MINT_DB_insert_deposit (PGconn *db_conn,
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const struct Deposit *deposit);
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/**
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* Global information for a refreshing session. Includes
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* dimensions of the operation, security parameters and
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* client signatures from "/refresh/melt" and "/refresh/commit".
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*/
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struct RefreshSession
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{
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/**
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* Signature over the commitments by the client,
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* only valid if @e has_commit_sig is set.
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*/
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struct GNUNET_CRYPTO_EddsaSignature commit_sig;
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/**
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* Hash over coins to melt and coins to create of the
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* refresh session.
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*/
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struct GNUNET_HashCode session_hash;
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/**
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* Signature over the melt by the client.
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*/
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struct GNUNET_CRYPTO_EddsaSignature melt_sig;
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/**
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* Number of coins we are melting.
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*/
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uint16_t num_oldcoins;
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/**
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* Number of new coins we are creating.
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*/
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uint16_t num_newcoins;
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/**
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* Number of parallel operations we perform for the cut and choose.
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* (must be greater or equal to three for security). 0 if not yet
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* known.
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*/
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uint16_t kappa;
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/**
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* Index (smaller @e kappa) which the mint has chosen to not
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* have revealed during cut and choose.
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*/
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uint16_t noreveal_index;
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};
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/**
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* Lookup refresh session data under the given public key.
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*
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* @param db_conn database handle to use
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* @param refresh_session_pub public key to use for the lookup
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* @param session[OUT] where to store the result
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* @return #GNUNET_YES on success,
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* #GNUNET_NO if not found,
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* #GNUNET_SYSERR on DB failure
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*/
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int
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TALER_MINT_DB_get_refresh_session (PGconn *db_conn,
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const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
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struct RefreshSession *session);
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/**
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* Store new refresh session data under the given public key.
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*
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* @param db_conn database handle to use
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* @param refresh_session_pub public key to use to locate the session
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* @param session session data to store
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* @return #GNUNET_YES on success,
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* #GNUNET_SYSERR on DB failure
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*/
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int
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TALER_MINT_DB_create_refresh_session (PGconn *db_conn,
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const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
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const struct RefreshSession *session);
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/**
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* Specification for coin in a /refresh/melt operation.
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*/
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struct RefreshMelt
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{
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/**
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* Information about the coin that is being melted.
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*/
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struct TALER_CoinPublicInfo coin;
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/**
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* Signature over the melting operation.
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*/
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struct GNUNET_CRYPTO_EcdsaSignature coin_sig;
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/**
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* Which melting operation should the coin become a part of.
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*/
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struct GNUNET_HashCode melt_hash;
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/**
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* How much value is being melted?
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* This amount includes the fees, so the final amount contributed
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* to the melt is this value minus the fee for melting the coin.
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*/
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struct TALER_Amount amount;
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};
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/**
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* Store the given /refresh/melt request in the database.
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*
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* @param db_conn database connection
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* @param session session key of the melt operation
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* @param oldcoin_index index of the coin to store
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* @param melt coin melt operation details to store
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* @return #GNUNET_OK on success
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* #GNUNET_SYSERR on internal error
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*/
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int
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TALER_MINT_DB_insert_refresh_melt (PGconn *db_conn,
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const struct GNUNET_CRYPTO_EddsaPublicKey *session,
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uint16_t oldcoin_index,
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const struct RefreshMelt *melt);
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/**
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* Get information about melted coin details from the database.
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*
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* @param db_conn database connection
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* @param session session key of the melt operation
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* @param oldcoin_index index of the coin to retrieve
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* @param melt melt data to fill in
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* @return #GNUNET_OK on success
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* #GNUNET_SYSERR on internal error
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*/
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int
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TALER_MINT_DB_get_refresh_melt (PGconn *db_conn,
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const struct GNUNET_CRYPTO_EddsaPublicKey *session,
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uint16_t oldcoin_index,
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struct RefreshMelt *melt);
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/**
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* Store in the database which coin(s) we want to create
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* in a given refresh operation.
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*
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* @param db_conn database connection
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* @param session_pub refresh session key
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* @param newcoin_index index of the coin to generate
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* @param denom_pub denomination of the coin to create
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* @return #GNUNET_OK on success
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* #GNUNET_SYSERR on internal error
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*/
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int
|
|
TALER_MINT_DB_insert_refresh_order (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
|
|
uint16_t newcoin_index,
|
|
const struct GNUNET_CRYPTO_rsa_PublicKey *denom_pub);
|
|
|
|
|
|
/**
|
|
* Lookup in the database the @a newcoin_index coin that we want to
|
|
* create in the given refresh operation.
|
|
*
|
|
* @param db_conn database connection
|
|
* @param session_pub refresh session key
|
|
* @param newcoin_index index of the coin to generate
|
|
* @param denom_pub denomination of the coin to create
|
|
* @return NULL on error (not found or internal error)
|
|
*/
|
|
struct GNUNET_CRYPTO_rsa_PublicKey *
|
|
TALER_MINT_DB_get_refresh_order (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
|
|
uint16_t newcoin_index);
|
|
|
|
|
|
/**
|
|
* We have as many `struct RefreshCommitCoin` as there are new
|
|
* coins being created by the refresh (for each of the kappa
|
|
* sets). These are the coins we ask the mint to sign if the
|
|
* respective set is selected.
|
|
*/
|
|
struct RefreshCommitCoin
|
|
{
|
|
|
|
/**
|
|
* Encrypted data allowing those able to decrypt it to derive
|
|
* the private keys of the new coins created by the refresh.
|
|
*/
|
|
struct TALER_RefreshLinkEncrypted *refresh_link;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
};
|
|
|
|
|
|
/**
|
|
* Store information about the commitment of the
|
|
* given coin for the given refresh session in the database.
|
|
*
|
|
* @param db_conn database connection to use
|
|
* @param refresh_session_pub refresh session this commitment belongs to
|
|
* @param i set index (1st dimension)
|
|
* @param j coin index (2nd dimension), corresponds to refreshed (new) coins
|
|
* @param commit_coin coin commitment to store
|
|
* @return #GNUNET_OK on success
|
|
* #GNUNET_SYSERR on error
|
|
*/
|
|
int
|
|
TALER_MINT_DB_insert_refresh_commit_coin (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
|
|
unsigned int i,
|
|
unsigned int j,
|
|
const struct RefreshCommitCoin *commit_coin);
|
|
|
|
|
|
/**
|
|
* Obtain information about the commitment of the
|
|
* given coin of the given refresh session from the database.
|
|
*
|
|
* @param db_conn database connection to use
|
|
* @param refresh_session_pub refresh session the commitment belongs to
|
|
* @param i set index (1st dimension)
|
|
* @param j coin index (2nd dimension), corresponds to refreshed (new) coins
|
|
* @param commit_coin[OUT] coin commitment to return
|
|
* @return #GNUNET_OK on success
|
|
* #GNUNET_NO if not found
|
|
* #GNUNET_SYSERR on error
|
|
*/
|
|
int
|
|
TALER_MINT_DB_get_refresh_commit_coin (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
|
|
unsigned int i,
|
|
unsigned int j,
|
|
struct RefreshCommitCoin *commit_coin);
|
|
|
|
|
|
/**
|
|
* For each (old) coin being melted, we have a `struct
|
|
* RefreshCommitLink` that allows the user to find the shared secret
|
|
* to decrypt the respective refresh links for the new coins in the
|
|
* `struct RefreshCommitCoin`.
|
|
*/
|
|
struct RefreshCommitLink
|
|
{
|
|
/**
|
|
* Transfer public key (FIXME: explain!)
|
|
*/
|
|
struct GNUNET_CRYPTO_EcdsaPublicKey transfer_pub;
|
|
|
|
/**
|
|
* Encrypted shared secret to decrypt the link.
|
|
*/
|
|
struct TALER_EncryptedLinkSecret shared_secret_enc;
|
|
};
|
|
|
|
|
|
/**
|
|
* Store the commitment to the given (encrypted) refresh link data
|
|
* for the given refresh session.
|
|
*
|
|
* @param db_conn database connection to use
|
|
* @param refresh_session_pub public key of the refresh session this
|
|
* commitment belongs with
|
|
* @param i set index (1st dimension)
|
|
* @param j coin index (2nd dimension), corresponds to melted (old) coins
|
|
* @param commit_link link information to store
|
|
* @return #GNUNET_SYSERR on internal error, #GNUNET_OK on success
|
|
*/
|
|
int
|
|
TALER_MINT_DB_insert_refresh_commit_link (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
|
|
unsigned int i,
|
|
unsigned int j,
|
|
const struct RefreshCommitLink *commit_link);
|
|
|
|
/**
|
|
* Obtain the commited (encrypted) refresh link data
|
|
* for the given refresh session.
|
|
*
|
|
* @param db_conn database connection to use
|
|
* @param refresh_session_pub public key of the refresh session this
|
|
* commitment belongs with
|
|
* @param i set index (1st dimension)
|
|
* @param j coin index (2nd dimension), corresponds to melted (old) coins
|
|
* @param cc[OUT] link information to return
|
|
* @return #GNUNET_SYSERR on internal error,
|
|
* #GNUNET_NO if commitment was not found
|
|
* #GNUNET_OK on success
|
|
*/
|
|
int
|
|
TALER_MINT_DB_get_refresh_commit_link (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EddsaPublicKey *refresh_session_pub,
|
|
unsigned int i,
|
|
unsigned int j,
|
|
struct RefreshCommitLink *cc);
|
|
|
|
|
|
/**
|
|
* Insert signature of a new coin generated during refresh into
|
|
* the database indexed by the refresh session and the index
|
|
* of the coin. This data is later used should an old coin
|
|
* be used to try to obtain the private keys during "/refresh/link".
|
|
*
|
|
* @param db_conn database connection
|
|
* @param session_pub refresh session
|
|
* @param newcoin_index coin index
|
|
* @param ev_sig coin signature
|
|
* @return #GNUNET_OK on success
|
|
*/
|
|
int
|
|
TALER_MINT_DB_insert_refresh_collectable (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EddsaPublicKey *session_pub,
|
|
uint16_t newcoin_index,
|
|
const struct GNUNET_CRYPTO_rsa_Signature *ev_sig);
|
|
|
|
|
|
/**
|
|
* Linked list of refresh information linked to a coin.
|
|
*/
|
|
struct LinkDataList
|
|
{
|
|
/**
|
|
* Information is stored in a NULL-terminated linked list.
|
|
*/
|
|
struct LinkDataList *next;
|
|
|
|
/**
|
|
* Link data, used to recover the private key of the coin
|
|
* by the owner of the old coin.
|
|
*/
|
|
struct TALER_RefreshLinkEncrypted *link_data_enc;
|
|
|
|
/**
|
|
* Denomination public key, determines the value of the coin.
|
|
*/
|
|
struct GNUNET_CRYPTO_rsa_PublicKey *denom_pub;
|
|
|
|
/**
|
|
* Signature over the blinded envelope.
|
|
*/
|
|
struct GNUNET_CRYPTO_rsa_Signature *ev_sig;
|
|
};
|
|
|
|
|
|
/**
|
|
* Obtain the link data of a coin, that is the encrypted link
|
|
* information, the denomination keys and the signatures.
|
|
*
|
|
* @param db_conn database connection
|
|
* @param coin_pub public key to use to retrieve linkage data
|
|
* @return all known link data for the coin
|
|
*/
|
|
struct LinkDataList *
|
|
TALER_db_get_link (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub);
|
|
|
|
|
|
/**
|
|
* Free memory of the link data list.
|
|
*
|
|
* @param ldl link data list to release
|
|
*/
|
|
void
|
|
TALER_db_link_data_list_free (struct LinkDataList *ldl);
|
|
|
|
|
|
/**
|
|
* Obtain shared secret and transfer public key from the public key of
|
|
* the coin. This information and the link information returned by
|
|
* #TALER_db_get_link() enable the owner of an old coin to determine
|
|
* the private keys of the new coins after the melt.
|
|
*
|
|
*
|
|
* @param db_conn database connection
|
|
* @param coin_pub public key of the coin
|
|
* @param transfer_pub[OUT] public transfer key
|
|
* @param shared_secret_enc[OUT] set to shared secret
|
|
* @return #GNUNET_OK on success,
|
|
* #GNUNET_NO on failure (not found)
|
|
* #GNUNET_SYSERR on internal failure (database issue)
|
|
*/
|
|
int
|
|
TALER_db_get_transfer (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub,
|
|
struct GNUNET_CRYPTO_EcdsaPublicKey *transfer_pub,
|
|
struct TALER_EncryptedLinkSecret *shared_secret_enc);
|
|
|
|
|
|
/**
|
|
* Specification for a /lock operation.
|
|
*/
|
|
struct Lock
|
|
{
|
|
/**
|
|
* Information about the coin that is being melted.
|
|
*/
|
|
struct TALER_CoinPublicInfo coin;
|
|
|
|
/**
|
|
* Signature over the melting operation.
|
|
*/
|
|
const struct GNUNET_CRYPTO_EcdsaSignature coin_sig;
|
|
|
|
/**
|
|
* How much value is being melted?
|
|
*/
|
|
struct TALER_Amount amount;
|
|
|
|
// FIXME: more needed...
|
|
};
|
|
|
|
|
|
/**
|
|
* Test if the given /lock request is known to us.
|
|
*
|
|
* @param db_conn database connection
|
|
* @param lock lock operation
|
|
* @return #GNUNET_YES if known,
|
|
* #GNUENT_NO if not,
|
|
* #GNUNET_SYSERR on internal error
|
|
*/
|
|
int
|
|
TALER_MINT_DB_have_lock (PGconn *db_conn,
|
|
const struct Lock *lock);
|
|
|
|
|
|
/**
|
|
* Store the given /lock request in the database.
|
|
*
|
|
* @param db_conn database connection
|
|
* @param lock lock operation
|
|
* @return #GNUNET_OK on success
|
|
* #GNUNET_SYSERR on internal error
|
|
*/
|
|
int
|
|
TALER_MINT_DB_insert_lock (PGconn *db_conn,
|
|
const struct Lock *lock);
|
|
|
|
|
|
/**
|
|
* Enumeration to classify the different types of transactions
|
|
* that can be done with a coin.
|
|
*/
|
|
enum TALER_MINT_DB_TransactionType
|
|
{
|
|
/**
|
|
* /deposit operation.
|
|
*/
|
|
TALER_MINT_DB_TT_DEPOSIT = 0,
|
|
|
|
/**
|
|
* /refresh/melt operation.
|
|
*/
|
|
TALER_MINT_DB_TT_REFRESH_MELT = 1,
|
|
|
|
/**
|
|
* /lock operation.
|
|
*/
|
|
TALER_MINT_DB_TT_LOCK = 2
|
|
};
|
|
|
|
|
|
/**
|
|
* List of transactions we performed for a particular coin.
|
|
*/
|
|
struct TALER_MINT_DB_TransactionList
|
|
{
|
|
|
|
/**
|
|
* Next pointer in the NULL-terminated linked list.
|
|
*/
|
|
struct TALER_MINT_DB_TransactionList *next;
|
|
|
|
/**
|
|
* Type of the transaction, determines what is stored in @e details.
|
|
*/
|
|
enum TALER_MINT_DB_TransactionType type;
|
|
|
|
/**
|
|
* Details about the transaction, depending on @e type.
|
|
*/
|
|
union
|
|
{
|
|
|
|
/**
|
|
* Details if transaction was a /deposit operation.
|
|
*/
|
|
struct Deposit *deposit;
|
|
|
|
/**
|
|
* Details if transaction was a /refresh/melt operation.
|
|
*/
|
|
struct RefreshMelt *melt;
|
|
|
|
/**
|
|
* Details if transaction was a /lock operation.
|
|
*/
|
|
struct Lock *lock;
|
|
|
|
} details;
|
|
|
|
};
|
|
|
|
|
|
/**
|
|
* Compile a list of all (historic) transactions performed
|
|
* with the given coin (/refresh/melt and /deposit operations).
|
|
*
|
|
* @param db_conn database connection
|
|
* @param coin_pub coin to investigate
|
|
* @return list of transactions, NULL if coin is fresh
|
|
*/
|
|
struct TALER_MINT_DB_TransactionList *
|
|
TALER_MINT_DB_get_coin_transactions (PGconn *db_conn,
|
|
const struct GNUNET_CRYPTO_EcdsaPublicKey *coin_pub);
|
|
|
|
|
|
/**
|
|
* Free linked list of transactions.
|
|
*
|
|
* @param list list to free
|
|
*/
|
|
void
|
|
TALER_MINT_DB_free_coin_transaction_list (struct TALER_MINT_DB_TransactionList *list);
|
|
|
|
|
|
|
|
#endif /* _NEURO_MINT_DB_H */
|