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/*
This file is part of GNU Taler
(C) 2019 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/>
*/
/**
* Helpers to create headless wallets.
* @author Florian Dold <dold@taler.net>
*/
/**
* Imports.
*/
import type {
IDBFactory,
ResultRow,
Sqlite3Interface,
Sqlite3Statement,
} from "@gnu-taler/idb-bridge";
// eslint-disable-next-line no-duplicate-imports
import {
AccessStats,
BridgeIDBFactory,
MemoryBackend,
createSqliteBackend,
shimIndexedDB,
} from "@gnu-taler/idb-bridge";
import {
Logger,
SetTimeoutTimerAPI,
WalletRunConfig,
} from "@gnu-taler/taler-util";
import { createPlatformHttpLib } from "@gnu-taler/taler-util/http";
import { qjsOs, qjsStd } from "@gnu-taler/taler-util/qtart";
import { SynchronousCryptoWorkerFactoryPlain } from "./crypto/workers/synchronousWorkerFactoryPlain.js";
import { DefaultNodeWalletArgs, makeTempfileId } from "./host-common.js";
import { Wallet } from "./wallet.js";
const logger = new Logger("host-impl.qtart.ts");
interface MakeDbResult {
idbFactory: BridgeIDBFactory;
getStats: () => AccessStats;
}
let numStmt = 0;
export async function createQtartSqlite3Impl(): Promise<Sqlite3Interface> {
const tart: any = (globalThis as any)._tart;
if (!tart) {
throw Error("globalThis._qtart not defined");
}
return {
open(filename: string) {
const internalDbHandle = tart.sqlite3Open(filename);
return {
internalDbHandle,
close() {
tart.sqlite3Close(internalDbHandle);
},
prepare(stmtStr): Sqlite3Statement {
const stmtHandle = tart.sqlite3Prepare(internalDbHandle, stmtStr);
return {
internalStatement: stmtHandle,
getAll(params): ResultRow[] {
numStmt++;
return tart.sqlite3StmtGetAll(stmtHandle, params);
},
getFirst(params): ResultRow | undefined {
numStmt++;
return tart.sqlite3StmtGetFirst(stmtHandle, params);
},
run(params) {
numStmt++;
return tart.sqlite3StmtRun(stmtHandle, params);
},
};
},
exec(sqlStr): void {
numStmt++;
tart.sqlite3Exec(internalDbHandle, sqlStr);
},
};
},
};
}
async function makeSqliteDb(
args: DefaultNodeWalletArgs,
): Promise<MakeDbResult> {
BridgeIDBFactory.enableTracing = false;
const imp = await createQtartSqlite3Impl();
const myBackend = await createSqliteBackend(imp, {
filename: args.persistentStoragePath ?? ":memory:",
});
myBackend.trackStats = true;
myBackend.enableTracing = false;
const myBridgeIdbFactory = new BridgeIDBFactory(myBackend);
return {
getStats() {
return {
...myBackend.accessStats,
primitiveStatements: numStmt,
};
},
idbFactory: myBridgeIdbFactory,
};
}
async function makeFileDb(
args: DefaultNodeWalletArgs = {},
): Promise<MakeDbResult> {
BridgeIDBFactory.enableTracing = false;
const myBackend = new MemoryBackend();
myBackend.enableTracing = false;
const storagePath = args.persistentStoragePath;
if (storagePath) {
const dbContentStr = qjsStd.loadFile(storagePath);
if (dbContentStr != null) {
const dbContent = JSON.parse(dbContentStr);
myBackend.importDump(dbContent);
}
myBackend.afterCommitCallback = async () => {
logger.trace("committing database");
// Allow caller to stop persisting the wallet.
if (args.persistentStoragePath === undefined) {
return;
}
const tmpPath = `${args.persistentStoragePath}-${makeTempfileId(5)}.tmp`;
const dbContent = myBackend.exportDump();
logger.trace("exported DB dump");
qjsStd.writeFile(tmpPath, JSON.stringify(dbContent, undefined, 2));
// Atomically move the temporary file onto the DB path.
const res = qjsOs.rename(tmpPath, args.persistentStoragePath);
if (res != 0) {
throw Error("db commit failed at rename");
}
logger.trace("committing database done");
};
}
const myBridgeIdbFactory = new BridgeIDBFactory(myBackend);
return {
idbFactory: myBridgeIdbFactory,
getStats: () => myBackend.accessStats,
};
}
export async function createNativeWalletHost2(
args: DefaultNodeWalletArgs = {},
): Promise<{
wallet: Wallet;
getDbStats: () => AccessStats;
}> {
BridgeIDBFactory.enableTracing = false;
let dbResp: MakeDbResult;
if (
args.persistentStoragePath &&
args.persistentStoragePath.endsWith(".json")
) {
logger.info("using JSON file DB backend (slow, only use for testing)");
dbResp = await makeFileDb(args);
} else {
logger.info("using sqlite3 DB backend");
dbResp = await makeSqliteDb(args);
}
const myIdbFactory: IDBFactory = dbResp.idbFactory as any as IDBFactory;
shimIndexedDB(dbResp.idbFactory);
const myHttpFactory = (config: WalletRunConfig) => {
let myHttpLib;
if (args.httpLib) {
myHttpLib = args.httpLib;
} else {
myHttpLib = createPlatformHttpLib({
enableThrottling: true,
requireTls: !config.features.allowHttp,
});
}
return myHttpLib;
};
let workerFactory;
workerFactory = new SynchronousCryptoWorkerFactoryPlain();
const timer = new SetTimeoutTimerAPI();
const w = await Wallet.create(
myIdbFactory,
myHttpFactory,
timer,
workerFactory,
);
if (args.notifyHandler) {
w.addNotificationListener(args.notifyHandler);
}
return {
wallet: w,
getDbStats: dbResp.getStats,
};
}
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