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/*
This file is part of GNU Taler
(C) 2019 GNUnet e.V.
GNU 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.
GNU 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
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* Imports.
*/
import {
oneShotIter,
runWithWriteTransaction,
oneShotGet,
oneShotPut,
} from "../util/query";
import { InternalWalletState } from "./state";
import { Stores, TipRecord, CoinStatus } from "../dbTypes";
import { Logger } from "../util/logging";
import { PaybackConfirmation } from "../talerTypes";
import { updateExchangeFromUrl } from "./exchanges";
import { NotificationType } from "../walletTypes";
const logger = new Logger("payback.ts");
export async function payback(
ws: InternalWalletState,
coinPub: string,
): Promise<void> {
let coin = await oneShotGet(ws.db, Stores.coins, coinPub);
if (!coin) {
throw Error(`Coin ${coinPub} not found, can't request payback`);
}
const reservePub = coin.reservePub;
if (!reservePub) {
throw Error(`Can't request payback for a refreshed coin`);
}
const reserve = await oneShotGet(ws.db, Stores.reserves, reservePub);
if (!reserve) {
throw Error(`Reserve of coin ${coinPub} not found`);
}
switch (coin.status) {
case CoinStatus.Dormant:
throw Error(`Can't do payback for coin ${coinPub} since it's dormant`);
}
coin.status = CoinStatus.Dormant;
// Even if we didn't get the payback yet, we suspend withdrawal, since
// technically we might update reserve status before we get the response
// from the reserve for the payback request.
reserve.hasPayback = true;
await runWithWriteTransaction(
ws.db,
[Stores.coins, Stores.reserves],
async tx => {
await tx.put(Stores.coins, coin!!);
await tx.put(Stores.reserves, reserve);
},
);
ws.notify({
type: NotificationType.PaybackStarted,
});
const paybackRequest = await ws.cryptoApi.createPaybackRequest(coin);
const reqUrl = new URL("payback", coin.exchangeBaseUrl);
const resp = await ws.http.postJson(reqUrl.href, paybackRequest);
if (resp.status !== 200) {
throw Error();
}
const paybackConfirmation = PaybackConfirmation.checked(await resp.json());
if (paybackConfirmation.reserve_pub !== coin.reservePub) {
throw Error(`Coin's reserve doesn't match reserve on payback`);
}
coin = await oneShotGet(ws.db, Stores.coins, coinPub);
if (!coin) {
throw Error(`Coin ${coinPub} not found, can't confirm payback`);
}
coin.status = CoinStatus.Dormant;
await oneShotPut(ws.db, Stores.coins, coin);
ws.notify({
type: NotificationType.PaybackFinished,
});
await updateExchangeFromUrl(ws, coin.exchangeBaseUrl, true);
}
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