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/*
* This file is part of LibEuFin.
* Copyright (C) 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.nexus.db
import tech.libeufin.common.db.*
import tech.libeufin.common.*
import java.sql.ResultSet
import java.time.Instant
/** Data access logic for exchange specific logic */
class ExchangeDAO(private val db: Database) {
/** Query history of taler incoming transactions */
suspend fun incomingHistory(
params: HistoryParams
): List<IncomingReserveTransaction>
= db.poolHistoryGlobal(params, db::listenIncoming, """
SELECT
incoming_transaction_id
,execution_time
,(amount).val AS amount_val
,(amount).frac AS amount_frac
,debit_payto_uri
,reserve_public_key
FROM talerable_incoming_transactions
JOIN incoming_transactions USING(incoming_transaction_id)
WHERE
""", "incoming_transaction_id") {
IncomingReserveTransaction(
row_id = it.getLong("incoming_transaction_id"),
date = it.getTalerTimestamp("execution_time"),
amount = it.getAmount("amount", db.bankCurrency),
debit_account = it.getString("debit_payto_uri"),
reserve_pub = EddsaPublicKey(it.getBytes("reserve_public_key")),
)
}
/** Query [exchangeId] history of taler outgoing transactions */
suspend fun outgoingHistory(
params: HistoryParams
): List<OutgoingTransaction>
= db.poolHistoryGlobal(params, db::listenOutgoing, """
SELECT
outgoing_transaction_id
,execution_time AS execution_time
,(amount).val AS amount_val
,(amount).frac AS amount_frac
,credit_payto_uri AS credit_payto_uri
,wtid
,exchange_base_url
FROM talerable_outgoing_transactions
JOIN outgoing_transactions USING(outgoing_transaction_id)
WHERE
""", "outgoing_transaction_id") {
OutgoingTransaction(
row_id = it.getLong("outgoing_transaction_id"),
date = it.getTalerTimestamp("execution_time"),
amount = it.getAmount("amount", db.bankCurrency),
credit_account = it.getString("credit_payto_uri"),
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 RequestUidReuse: TransferResult
}
/** Perform a Taler transfer */
suspend fun transfer(
req: TransferRequest,
bankId: String,
now: Instant
): TransferResult = db.serializable { conn ->
val subject = "${req.wtid} ${req.exchange_base_url.url}"
val stmt = conn.prepareStatement("""
SELECT
out_request_uid_reuse
,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, bankId)
stmt.setLong(9, now.micros())
stmt.one {
when {
it.getBoolean("out_request_uid_reuse") -> TransferResult.RequestUidReuse
else -> TransferResult.Success(
id = it.getLong("out_tx_row_id"),
timestamp = it.getTalerTimestamp("out_timestamp")
)
}
}
}
}
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