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Diffstat (limited to 'packages/taler-wallet-core/src/headless/helpers.ts')
-rw-r--r-- | packages/taler-wallet-core/src/headless/helpers.ts | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/packages/taler-wallet-core/src/headless/helpers.ts b/packages/taler-wallet-core/src/headless/helpers.ts deleted file mode 100644 index f2285e149..000000000 --- a/packages/taler-wallet-core/src/headless/helpers.ts +++ /dev/null @@ -1,164 +0,0 @@ -/* - 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 { - MemoryBackend, - BridgeIDBFactory, - shimIndexedDB, -} from "@gnu-taler/idb-bridge"; -import { openTalerDatabase } from "../db-utils.js"; -import { HttpRequestLibrary } from "../util/http.js"; -import { NodeThreadCryptoWorkerFactory } from "../crypto/workers/nodeThreadWorker.js"; -import { NodeHttpLib } from "./NodeHttpLib.js"; -import { Logger } from "@gnu-taler/taler-util"; -import { SynchronousCryptoWorkerFactory } from "../crypto/workers/synchronousWorker.js"; -import type { IDBFactory } from "@gnu-taler/idb-bridge"; -import { WalletNotification } from "@gnu-taler/taler-util"; -import { Wallet } from "../wallet.js"; -import * as fs from "fs"; - -const logger = new Logger("headless/helpers.ts"); - -export interface DefaultNodeWalletArgs { - /** - * Location of the wallet database. - * - * If not specified, the wallet starts out with an empty database and - * the wallet database is stored only in memory. - */ - persistentStoragePath?: string; - - /** - * Handler for asynchronous notifications from the wallet. - */ - notifyHandler?: (n: WalletNotification) => void; - - /** - * If specified, use this as HTTP request library instead - * of the default one. - */ - httpLib?: HttpRequestLibrary; -} - -/** - * Generate a random alphanumeric ID. Does *not* use cryptographically - * secure randomness. - */ -function makeId(length: number): string { - let result = ""; - const characters = "abcdefghijklmnopqrstuvwxyz0123456789"; - for (let i = 0; i < length; i++) { - result += characters.charAt(Math.floor(Math.random() * characters.length)); - } - return result; -} - -/** - * Get a wallet instance with default settings for node. - */ -export async function getDefaultNodeWallet( - args: DefaultNodeWalletArgs = {}, -): Promise<Wallet> { - BridgeIDBFactory.enableTracing = false; - const myBackend = new MemoryBackend(); - myBackend.enableTracing = false; - - const storagePath = args.persistentStoragePath; - if (storagePath) { - try { - const dbContentStr: string = fs.readFileSync(storagePath, { - encoding: "utf-8", - }); - const dbContent = JSON.parse(dbContentStr); - myBackend.importDump(dbContent); - } catch (e: any) { - const code: string = e.code; - if (code === "ENOENT") { - logger.trace("wallet file doesn't exist yet"); - } else { - logger.error("could not open wallet database file"); - throw e; - } - } - - myBackend.afterCommitCallback = async () => { - logger.trace("committing database"); - // Allow caller to stop persisting the wallet. - if (args.persistentStoragePath === undefined) { - return; - } - const tmpPath = `${args.persistentStoragePath}-${makeId(5)}.tmp`; - const dbContent = myBackend.exportDump(); - fs.writeFileSync(tmpPath, JSON.stringify(dbContent, undefined, 2), { - encoding: "utf-8", - }); - // Atomically move the temporary file onto the DB path. - fs.renameSync(tmpPath, args.persistentStoragePath); - }; - } - - BridgeIDBFactory.enableTracing = false; - - const myBridgeIdbFactory = new BridgeIDBFactory(myBackend); - const myIdbFactory: IDBFactory = (myBridgeIdbFactory as any) as IDBFactory; - - let myHttpLib; - if (args.httpLib) { - myHttpLib = args.httpLib; - } else { - myHttpLib = new NodeHttpLib(); - } - - const myVersionChange = (): Promise<void> => { - logger.error("version change requested, should not happen"); - throw Error( - "BUG: wallet DB version change event can't happen with memory IDB", - ); - }; - - shimIndexedDB(myBridgeIdbFactory); - - const myDb = await openTalerDatabase(myIdbFactory, myVersionChange); - - let workerFactory; - try { - // Try if we have worker threads available, fails in older node versions. - const _r = "require"; - const worker_threads = module[_r]("worker_threads"); - // require("worker_threads"); - workerFactory = new NodeThreadCryptoWorkerFactory(); - } catch (e) { - logger.warn( - "worker threads not available, falling back to synchronous workers", - ); - workerFactory = new SynchronousCryptoWorkerFactory(); - } - - const w = await Wallet.create(myDb, myHttpLib, workerFactory); - - if (args.notifyHandler) { - w.addNotificationListener(args.notifyHandler); - } - return w; -} |