1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
This file is part of TALER
Copyright (C) 2014, 2015 Christian Grothoff (and other contributing authors)
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU 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, If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file mint/taler-mint_httpd_db.h
* @brief High-level (transactional-layer) database operations for the mint
* @author Chrisitan Grothoff
*/
#ifndef TALER_MINT_HTTPD_DB_H
#define TALER_MINT_HTTPD_DB_H
#include <libpq-fe.h>
#include <microhttpd.h>
#include <gnunet/gnunet_util_lib.h>
#include "taler_util.h"
#include "taler_mintdb_plugin.h"
/**
* Execute a "/deposit". The validity of the coin and signature
* have already been checked. The database must now check that
* the coin is not (double or over) spent, and execute the
* transaction (record details, generate success or failure response).
*
* @param connection the MHD connection to handle
* @param deposit information about the deposit
* @return MHD result code
*/
int
TALER_MINT_db_execute_deposit (struct MHD_Connection *connection,
const struct Deposit *deposit);
/**
* Execute a "/withdraw/status". Given the public key of a reserve,
* return the associated transaction history.
*
* @param connection the MHD connection to handle
* @param reserve_pub public key of the reserve to check
* @return MHD result code
*/
int
TALER_MINT_db_execute_withdraw_status (struct MHD_Connection *connection,
const struct TALER_ReservePublicKey *reserve_pub);
/**
* Execute a "/withdraw/sign". Given a reserve and a properly signed
* request to withdraw a coin, check the balance of the reserve and
* if it is sufficient, store the request and return the signed
* blinded envelope.
*
* @param connection the MHD connection to handle
* @param reserve public key of the reserve
* @param denomination_pub public key of the denomination requested
* @param blinded_msg blinded message to be signed
* @param blinded_msg_len number of bytes in @a blinded_msg
* @param signature signature over the withdraw request, to be stored in DB
* @return MHD result code
*/
int
TALER_MINT_db_execute_withdraw_sign (struct MHD_Connection *connection,
const struct TALER_ReservePublicKey *reserve,
const struct TALER_DenominationPublicKey *denomination_pub,
const char *blinded_msg,
size_t blinded_msg_len,
const struct TALER_ReserveSignature *signature);
/**
* Details about a melt operation of an individual coin.
*/
struct MeltDetails
{
/**
* Signature allowing the melt (using
* a `struct RefreshMeltConfirmSignRequestBody`) to sign over.
*/
struct TALER_CoinSpendSignature melt_sig;
/**
* How much of the coin's value did the client allow to be melted?
* This amount includes the fees, so the final amount contributed
* to the melt is this value minus the fee for melting the coin.
*/
struct TALER_Amount melt_amount_with_fee;
};
/**
* Execute a "/refresh/melt". We have been given a list of valid
* coins and a request to melt them into the given
* @a refresh_session_pub. Check that the coins all have the
* required value left and if so, store that they have been
* melted and confirm the melting operation to the client.
*
* FIXME: some arguments are redundant here...
*
* @param connection the MHD connection to handle
* @param melt_hash hash code of the session the coins are melted into
* @param refresh_session_pub public key of the refresh session
* @param client_signature signature of the client (matching @a refresh_session_pub)
* over the melting request
* @param num_new_denoms number of entries in @a denom_pubs, size of y-dimension of @commit_coin array
* @param denum_pubs array of public denomination keys for the refresh (?)
* @param coin_count number of entries in @a coin_public_infos and @ a coin_melt_details, size of y-dimension of @commit_link array
* @param coin_public_infos information about the coins to melt
* @param coin_melt_details signatures and (residual) value of the respective coin should be melted
* @param kappa size of x-dimension of @commit_coin and @commit_link arrays
* @param commit_coin 2d array of coin commitments (what the mint is to sign
* once the "/refres/reveal" of cut and choose is done)
* @param commit_link 2d array of coin link commitments (what the mint is
* to return via "/refresh/link" to enable linkage in the
* future)
* @return MHD result code
*/
int
TALER_MINT_db_execute_refresh_melt (struct MHD_Connection *connection,
const struct GNUNET_HashCode *melt_hash,
const struct TALER_SessionPublicKey *refresh_session_pub,
const struct TALER_SessionSignature *client_signature,
unsigned int num_new_denoms,
const struct TALER_DenominationPublicKey *denom_pubs,
unsigned int coin_count,
const struct TALER_CoinPublicInfo *coin_public_infos,
const struct MeltDetails *coin_melt_details,
unsigned int kappa,
struct RefreshCommitCoin *const* commit_coin,
struct RefreshCommitLink *const* commit_link);
/**
* Execute a "/refresh/reveal". The client is revealing to us the
* transfer keys for @a kappa-1 sets of coins. Verify that the
* revealed transfer keys would allow linkage to the blinded coins,
* and if so, return the signed coins for corresponding to the set of
* coins that was not chosen.
*
* @param connection the MHD connection to handle
* @param refresh_session_pub public key of the refresh session
* @param kappa size of x-dimension of @transfer_privs array plus one (!)
* @param num_oldcoins size of y-dimension of @transfer_privs array
* @param transfer_pubs array with the revealed transfer keys
* @return MHD result code
*/
int
TALER_MINT_db_execute_refresh_reveal (struct MHD_Connection *connection,
const struct TALER_SessionPublicKey *refresh_session_pub,
unsigned int kappa,
unsigned int num_oldcoins,
struct TALER_TransferPrivateKey **transfer_privs);
/**
* Execute a "/refresh/link". Returns the linkage information that
* will allow the owner of a coin to follow the refresh trail to the
* refreshed coin.
*
* @param connection the MHD connection to handle
* @param coin_pub public key of the coin to link
* @return MHD result code
*/
int
TALER_MINT_db_execute_refresh_link (struct MHD_Connection *connection,
const struct TALER_CoinSpendPublicKey *coin_pub);
#endif
/* TALER_MINT_HTTPD_DB_H */
|
