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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* This file is part of LibEuFin.
* Copyright (C) 2023-2024 Taler Systems S.A.
* LibEuFin is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation; either version 3, or
* (at your option) any later version.
* LibEuFin is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General
* Public License for more details.
* You should have received a copy of the GNU Affero General Public
* License along with LibEuFin; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>
*/
package tech.libeufin.bank.db
import tech.libeufin.bank.*
import tech.libeufin.common.*
import java.time.Instant
/** Data access logic for exchange specific logic */
class ExchangeDAO(private val db: Database) {
/** Query [exchangeId] history of taler incoming transactions */
suspend fun incomingHistory(
params: HistoryParams,
exchangeId: Long,
ctx: BankPaytoCtx
): List<IncomingReserveTransaction>
= db.poolHistory(params, exchangeId, NotificationWatcher::listenIncoming, """
SELECT
bank_transaction_id
,transaction_date
,(amount).val AS amount_val
,(amount).frac AS amount_frac
,debtor_payto_uri
,debtor_name
,reserve_pub
FROM taler_exchange_incoming AS tfr
JOIN bank_account_transactions AS txs
ON bank_transaction=txs.bank_transaction_id
WHERE
""") {
IncomingReserveTransaction(
row_id = it.getLong("bank_transaction_id"),
date = it.getTalerTimestamp("transaction_date"),
amount = it.getAmount("amount", db.bankCurrency),
debit_account = it.getBankPayto("debtor_payto_uri", "debtor_name", ctx),
reserve_pub = EddsaPublicKey(it.getBytes("reserve_pub")),
)
}
/** Query [exchangeId] history of taler outgoing transactions */
suspend fun outgoingHistory(
params: HistoryParams,
exchangeId: Long,
ctx: BankPaytoCtx
): List<OutgoingTransaction>
= db.poolHistory(params, exchangeId, NotificationWatcher::listenOutgoing, """
SELECT
bank_transaction_id
,transaction_date
,(amount).val AS amount_val
,(amount).frac AS amount_frac
,creditor_payto_uri
,creditor_name
,wtid
,exchange_base_url
FROM taler_exchange_outgoing AS tfr
JOIN bank_account_transactions AS txs
ON bank_transaction=txs.bank_transaction_id
WHERE
""") {
OutgoingTransaction(
row_id = it.getLong("bank_transaction_id"),
date = it.getTalerTimestamp("transaction_date"),
amount = it.getAmount("amount", db.bankCurrency),
credit_account = it.getBankPayto("creditor_payto_uri", "creditor_name", ctx),
wtid = ShortHashCode(it.getBytes("wtid")),
exchange_base_url = it.getString("exchange_base_url")
)
}
/** Result of taler transfer transaction creation */
sealed interface TransferResult {
/** Transaction [id] and wire transfer [timestamp] */
data class Success(val id: Long, val timestamp: TalerProtocolTimestamp): TransferResult
data object NotAnExchange: TransferResult
data object UnknownExchange: TransferResult
data object UnknownCreditor: TransferResult
data object BothPartyAreExchange: TransferResult
data object BalanceInsufficient: TransferResult
data object ReserveUidReuse: TransferResult
}
/** Perform a Taler transfer */
suspend fun transfer(
req: TransferRequest,
login: String,
now: Instant
): TransferResult = db.serializable { conn ->
val subject = "${req.wtid} ${req.exchange_base_url.url}"
val stmt = conn.prepareStatement("""
SELECT
out_debtor_not_found
,out_debtor_not_exchange
,out_creditor_not_found
,out_both_exchanges
,out_request_uid_reuse
,out_exchange_balance_insufficient
,out_tx_row_id
,out_timestamp
FROM
taler_transfer (
?, ?, ?,
(?,?)::taler_amount,
?, ?, ?, ?
);
""")
stmt.setBytes(1, req.request_uid.raw)
stmt.setBytes(2, req.wtid.raw)
stmt.setString(3, subject)
stmt.setLong(4, req.amount.value)
stmt.setInt(5, req.amount.frac)
stmt.setString(6, req.exchange_base_url.url)
stmt.setString(7, req.credit_account.canonical)
stmt.setString(8, login)
stmt.setLong(9, now.toDbMicros() ?: throw faultyTimestampByBank())
stmt.executeQuery().use {
when {
!it.next() ->
throw internalServerError("SQL function taler_transfer did not return anything.")
it.getBoolean("out_debtor_not_found") -> TransferResult.UnknownExchange
it.getBoolean("out_debtor_not_exchange") -> TransferResult.NotAnExchange
it.getBoolean("out_creditor_not_found") -> TransferResult.UnknownCreditor
it.getBoolean("out_both_exchanges") -> TransferResult.BothPartyAreExchange
it.getBoolean("out_exchange_balance_insufficient") -> TransferResult.BalanceInsufficient
it.getBoolean("out_request_uid_reuse") -> TransferResult.ReserveUidReuse
else -> TransferResult.Success(
id = it.getLong("out_tx_row_id"),
timestamp = it.getTalerTimestamp("out_timestamp")
)
}
}
}
/** Result of taler add incoming transaction creation */
sealed interface AddIncomingResult {
/** Transaction [id] and wire transfer [timestamp] */
data class Success(val id: Long, val timestamp: TalerProtocolTimestamp): AddIncomingResult
data object NotAnExchange: AddIncomingResult
data object UnknownExchange: AddIncomingResult
data object UnknownDebtor: AddIncomingResult
data object BothPartyAreExchange: AddIncomingResult
data object ReservePubReuse: AddIncomingResult
data object BalanceInsufficient: AddIncomingResult
}
/** Add a new taler incoming transaction */
suspend fun addIncoming(
req: AddIncomingRequest,
login: String,
now: Instant
): AddIncomingResult = db.serializable { conn ->
val stmt = conn.prepareStatement("""
SELECT
out_creditor_not_found
,out_creditor_not_exchange
,out_debtor_not_found
,out_both_exchanges
,out_reserve_pub_reuse
,out_debitor_balance_insufficient
,out_tx_row_id
FROM
taler_add_incoming (
?, ?,
(?,?)::taler_amount,
?, ?, ?
);
""")
stmt.setBytes(1, req.reserve_pub.raw)
stmt.setString(2, "Manual incoming ${req.reserve_pub}")
stmt.setLong(3, req.amount.value)
stmt.setInt(4, req.amount.frac)
stmt.setString(5, req.debit_account.canonical)
stmt.setString(6, login)
stmt.setLong(7, now.toDbMicros() ?: throw faultyTimestampByBank())
stmt.executeQuery().use {
when {
!it.next() ->
throw internalServerError("SQL function taler_add_incoming did not return anything.")
it.getBoolean("out_creditor_not_found") -> AddIncomingResult.UnknownExchange
it.getBoolean("out_creditor_not_exchange") -> AddIncomingResult.NotAnExchange
it.getBoolean("out_debtor_not_found") -> AddIncomingResult.UnknownDebtor
it.getBoolean("out_both_exchanges") -> AddIncomingResult.BothPartyAreExchange
it.getBoolean("out_debitor_balance_insufficient") -> AddIncomingResult.BalanceInsufficient
it.getBoolean("out_reserve_pub_reuse") -> AddIncomingResult.ReservePubReuse
else -> AddIncomingResult.Success(
id = it.getLong("out_tx_row_id"),
timestamp = TalerProtocolTimestamp(now)
)
}
}
}
}
|
