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/*
This file is part of GNU Taler
(C) 2021 Taler Systems S.A.
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 { ExchangeRecord } from "../db.js";
import { Logger } from "@gnu-taler/taler-util";
import { getExchangeDetails } from "./exchanges.js";
import { InternalWalletState } from "./state.js";
const logger = new Logger("currencies.ts");
export interface TrustInfo {
isTrusted: boolean;
isAudited: boolean;
}
/**
* Check if and how an exchange is trusted and/or audited.
*/
export async function getExchangeTrust(
ws: InternalWalletState,
exchangeInfo: ExchangeRecord,
): Promise<TrustInfo> {
let isTrusted = false;
let isAudited = false;
return await ws.db
.mktx((x) => ({
exchanges: x.exchanges,
exchangeDetails: x.exchangeDetails,
exchangesTrustStore: x.exchangeTrust,
auditorTrust: x.auditorTrust,
}))
.runReadOnly(async (tx) => {
const exchangeDetails = await getExchangeDetails(
tx,
exchangeInfo.baseUrl,
);
if (!exchangeDetails) {
throw Error(`exchange ${exchangeInfo.baseUrl} details not available`);
}
const exchangeTrustRecord = await tx.exchangesTrustStore.indexes.byExchangeMasterPub.get(
exchangeDetails.masterPublicKey,
);
if (
exchangeTrustRecord &&
exchangeTrustRecord.uids.length > 0 &&
exchangeTrustRecord.currency === exchangeDetails.currency
) {
isTrusted = true;
}
for (const auditor of exchangeDetails.auditors) {
const auditorTrustRecord = await tx.auditorTrust.indexes.byAuditorPub.get(
auditor.auditor_pub,
);
if (auditorTrustRecord && auditorTrustRecord.uids.length > 0) {
isAudited = true;
break;
}
}
return { isTrusted, isAudited };
});
}
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