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/*
* This file is part of LibEuFin.
* Copyright (C) 2023 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/>
*/
// This file contains the Taler Wire Gateway API handlers.
package tech.libeufin.bank
import io.ktor.http.*
import io.ktor.server.application.*
import io.ktor.server.request.*
import io.ktor.server.response.*
import io.ktor.server.routing.*
import io.ktor.util.pipeline.PipelineContext
import java.time.Instant
import net.taler.common.errorcodes.TalerErrorCode
import org.slf4j.Logger
import org.slf4j.LoggerFactory
import tech.libeufin.bank.ExchangeDAO.*
private val logger: Logger = LoggerFactory.getLogger("tech.libeufin.nexus")
fun Routing.wireGatewayApi(db: Database, ctx: BankConfig) {
get("/taler-wire-gateway/config") {
call.respond(TWGConfigResponse(
currency = ctx.regionalCurrency
))
return@get
}
auth(db, TokenScope.readwrite) {
post("/accounts/{USERNAME}/taler-wire-gateway/transfer") {
val req = call.receive<TransferRequest>()
ctx.checkRegionalCurrency(req.amount)
val res = db.exchange.transfer(
req = req,
login = username,
now = Instant.now()
)
when (res) {
is TransferResult.UnknownExchange -> throw unknownAccount(username)
is TransferResult.NotAnExchange -> throw conflict(
"$username is not an exchange account.",
TalerErrorCode.BANK_ACCOUNT_IS_NOT_EXCHANGE
)
is TransferResult.UnknownCreditor -> throw conflict(
"Creditor account was not found",
TalerErrorCode.BANK_UNKNOWN_CREDITOR
)
is TransferResult.BothPartyAreExchange -> throw conflict(
"Wire transfer attempted with credit and debit party being both exchange account",
TalerErrorCode.BANK_ACCOUNT_IS_EXCHANGE
)
is TransferResult.ReserveUidReuse -> throw conflict(
"request_uid used already",
TalerErrorCode.BANK_TRANSFER_REQUEST_UID_REUSED
)
is TransferResult.BalanceInsufficient -> throw conflict(
"Insufficient balance for exchange",
TalerErrorCode.BANK_UNALLOWED_DEBIT
)
is TransferResult.Success -> call.respond(
TransferResponse(
timestamp = res.timestamp,
row_id = res.id
)
)
}
}
}
auth(db, TokenScope.readonly) {
suspend fun <T> PipelineContext<Unit, ApplicationCall>.historyEndpoint(
reduce: (List<T>, String) -> Any,
dbLambda: suspend ExchangeDAO.(HistoryParams, Long) -> List<T>
) {
val params = HistoryParams.extract(context.request.queryParameters)
val bankAccount = call.bankInfo(db)
if (!bankAccount.isTalerExchange)
throw conflict(
"$username is not an exchange account.",
TalerErrorCode.BANK_ACCOUNT_IS_NOT_EXCHANGE
)
val items = db.exchange.dbLambda(params, bankAccount.bankAccountId);
if (items.isEmpty()) {
call.respond(HttpStatusCode.NoContent)
} else {
call.respond(reduce(items, bankAccount.internalPaytoUri))
}
}
get("/accounts/{USERNAME}/taler-wire-gateway/history/incoming") {
historyEndpoint(::IncomingHistory, ExchangeDAO::incomingHistory)
}
get("/accounts/{USERNAME}/taler-wire-gateway/history/outgoing") {
historyEndpoint(::OutgoingHistory, ExchangeDAO::outgoingHistory)
}
}
authAdmin(db, TokenScope.readwrite) {
post("/accounts/{USERNAME}/taler-wire-gateway/admin/add-incoming") {
val req = call.receive<AddIncomingRequest>()
ctx.checkRegionalCurrency(req.amount)
val timestamp = Instant.now()
val res = db.exchange.addIncoming(
req = req,
login = username,
now = timestamp
)
when (res) {
is AddIncomingResult.UnknownExchange -> throw unknownAccount(username)
is AddIncomingResult.NotAnExchange -> throw conflict(
"$username is not an exchange account.",
TalerErrorCode.BANK_ACCOUNT_IS_NOT_EXCHANGE
)
is AddIncomingResult.UnknownDebtor -> throw conflict(
"Debtor account was not found",
TalerErrorCode.BANK_UNKNOWN_DEBTOR
)
is AddIncomingResult.BothPartyAreExchange -> throw conflict(
"Wire transfer attempted with credit and debit party being both exchange account",
TalerErrorCode.BANK_ACCOUNT_IS_EXCHANGE
)
is AddIncomingResult.ReservePubReuse -> throw conflict(
"reserve_pub used already",
TalerErrorCode.BANK_DUPLICATE_RESERVE_PUB_SUBJECT
)
is AddIncomingResult.BalanceInsufficient -> throw conflict(
"Insufficient balance for debitor",
TalerErrorCode.BANK_UNALLOWED_DEBIT
)
is AddIncomingResult.Success -> call.respond(
AddIncomingResponse(
timestamp = TalerProtocolTimestamp(timestamp),
row_id = res.id
)
)
}
}
}
}
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