90 lines
3.0 KiB
TypeScript
90 lines
3.0 KiB
TypeScript
/*
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This file is part of GNU Taler
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(C) 2019 GNUnet e.V.
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GNU Taler is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* Imports.
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*/
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import {
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Database
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} from "../util/query";
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import { InternalWalletState } from "./state";
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import { Stores, TipRecord, CoinStatus } from "../types/dbTypes";
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import { Logger } from "../util/logging";
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import { RecoupConfirmation, codecForRecoupConfirmation } from "../types/talerTypes";
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import { updateExchangeFromUrl } from "./exchanges";
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import { NotificationType } from "../types/notifications";
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const logger = new Logger("payback.ts");
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export async function payback(
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ws: InternalWalletState,
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coinPub: string,
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): Promise<void> {
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let coin = await ws.db.get(Stores.coins, coinPub);
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if (!coin) {
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throw Error(`Coin ${coinPub} not found, can't request payback`);
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}
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const reservePub = coin.reservePub;
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if (!reservePub) {
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throw Error(`Can't request payback for a refreshed coin`);
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}
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const reserve = await ws.db.get(Stores.reserves, reservePub);
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if (!reserve) {
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throw Error(`Reserve of coin ${coinPub} not found`);
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}
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switch (coin.status) {
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case CoinStatus.Dormant:
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throw Error(`Can't do payback for coin ${coinPub} since it's dormant`);
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}
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coin.status = CoinStatus.Dormant;
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// Even if we didn't get the payback yet, we suspend withdrawal, since
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// technically we might update reserve status before we get the response
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// from the reserve for the payback request.
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reserve.hasPayback = true;
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await ws.db.runWithWriteTransaction(
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[Stores.coins, Stores.reserves],
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async tx => {
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await tx.put(Stores.coins, coin!!);
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await tx.put(Stores.reserves, reserve);
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},
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);
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ws.notify({
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type: NotificationType.PaybackStarted,
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});
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const paybackRequest = await ws.cryptoApi.createPaybackRequest(coin);
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const reqUrl = new URL("payback", coin.exchangeBaseUrl);
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const resp = await ws.http.postJson(reqUrl.href, paybackRequest);
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if (resp.status !== 200) {
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throw Error();
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}
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const paybackConfirmation = codecForRecoupConfirmation().decode(await resp.json());
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if (paybackConfirmation.reserve_pub !== coin.reservePub) {
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throw Error(`Coin's reserve doesn't match reserve on payback`);
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}
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coin = await ws.db.get(Stores.coins, coinPub);
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if (!coin) {
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throw Error(`Coin ${coinPub} not found, can't confirm payback`);
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}
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coin.status = CoinStatus.Dormant;
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await ws.db.put(Stores.coins, coin);
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ws.notify({
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type: NotificationType.PaybackFinished,
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});
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await updateExchangeFromUrl(ws, coin.exchangeBaseUrl, true);
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}
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