modularize repo, use pnpm, improve typechecking

1 files changed, 285 insertions, 0 deletions

diff --git a/packages/taler-wallet-android/src/index.ts b/packages/taler-wallet-android/src/index.ts
new file mode 100644
index 000000000..d0001e991
--- /dev/null
+++ b/packages/taler-wallet-android/src/index.ts
@@ -0,0 +1,285 @@
+/*
+ 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 {
+  Wallet,
+  getDefaultNodeWallet,
+  DefaultNodeWalletArgs,
+  versions,
+  httpLib,
+  nodeThreadWorker,
+  promiseUtil,
+  NodeHttpLib,
+  walletCoreApi,
+  walletNotifications,
+  TalerErrorCode,
+  makeErrorDetails,
+} from "taler-wallet-core";
+
+import fs from "fs";
+
+export const handleWorkerError = nodeThreadWorker.handleWorkerError;
+export const handleWorkerMessage = nodeThreadWorker.handleWorkerMessage;
+
+export class AndroidHttpLib implements httpLib.HttpRequestLibrary {
+  useNfcTunnel = false;
+
+  private nodeHttpLib: httpLib.HttpRequestLibrary = new NodeHttpLib();
+
+  private requestId = 1;
+
+  private requestMap: {
+    [id: number]: promiseUtil.OpenedPromise<httpLib.HttpResponse>;
+  } = {};
+
+  constructor(private sendMessage: (m: string) => void) {}
+
+  get(
+    url: string,
+    opt?: httpLib.HttpRequestOptions,
+  ): Promise<httpLib.HttpResponse> {
+    if (this.useNfcTunnel) {
+      const myId = this.requestId++;
+      const p = promiseUtil.openPromise<httpLib.HttpResponse>();
+      this.requestMap[myId] = p;
+      const request = {
+        method: "get",
+        url,
+      };
+      this.sendMessage(
+        JSON.stringify({
+          type: "tunnelHttp",
+          request,
+          id: myId,
+        }),
+      );
+      return p.promise;
+    } else {
+      return this.nodeHttpLib.get(url, opt);
+    }
+  }
+
+  postJson(
+    url: string,
+    body: any,
+    opt?: httpLib.HttpRequestOptions,
+  ): Promise<httpLib.HttpResponse> {
+    if (this.useNfcTunnel) {
+      const myId = this.requestId++;
+      const p = promiseUtil.openPromise<httpLib.HttpResponse>();
+      this.requestMap[myId] = p;
+      const request = {
+        method: "postJson",
+        url,
+        body,
+      };
+      this.sendMessage(
+        JSON.stringify({ type: "tunnelHttp", request, id: myId }),
+      );
+      return p.promise;
+    } else {
+      return this.nodeHttpLib.postJson(url, body, opt);
+    }
+  }
+
+  handleTunnelResponse(msg: any): void {
+    const myId = msg.id;
+    const p = this.requestMap[myId];
+    if (!p) {
+      console.error(
+        `no matching request for tunneled HTTP response, id=${myId}`,
+      );
+    }
+    const headers = new httpLib.Headers();
+    if (msg.status != 0) {
+      const resp: httpLib.HttpResponse = {
+        // FIXME: pass through this URL
+        requestUrl: "",
+        headers,
+        status: msg.status,
+        json: async () => JSON.parse(msg.responseText),
+        text: async () => msg.responseText,
+      };
+      p.resolve(resp);
+    } else {
+      p.reject(new Error(`unexpected HTTP status code ${msg.status}`));
+    }
+    delete this.requestMap[myId];
+  }
+}
+
+function sendAkonoMessage(ev: walletCoreApi.CoreApiEnvelope): void {
+  // @ts-ignore
+  const sendMessage = globalThis.__akono_sendMessage;
+  if (typeof sendMessage !== "function") {
+    const errMsg =
+      "FATAL: cannot install android wallet listener: akono functions missing";
+    console.error(errMsg);
+    throw new Error(errMsg);
+  }
+  const m = JSON.stringify(ev);
+  // @ts-ignore
+  sendMessage(m);
+}
+
+class AndroidWalletMessageHandler {
+  walletArgs: DefaultNodeWalletArgs | undefined;
+  maybeWallet: Wallet | undefined;
+  wp = promiseUtil.openPromise<Wallet>();
+  httpLib = new NodeHttpLib();
+
+  /**
+   * Handle a request from the Android wallet.
+   */
+  async handleMessage(
+    operation: string,
+    id: string,
+    args: any,
+  ): Promise<walletCoreApi.CoreApiResponse> {
+    const wrapResponse = (
+      result: unknown,
+    ): walletCoreApi.CoreApiResponseSuccess => {
+      return {
+        type: "response",
+        id,
+        operation,
+        result,
+      };
+    };
+    switch (operation) {
+      case "init": {
+        this.walletArgs = {
+          notifyHandler: async (
+            notification: walletNotifications.WalletNotification,
+          ) => {
+            sendAkonoMessage({ type: "notification", payload: notification });
+          },
+          persistentStoragePath: args.persistentStoragePath,
+          httpLib: this.httpLib,
+        };
+        const w = await getDefaultNodeWallet(this.walletArgs);
+        this.maybeWallet = w;
+        w.runRetryLoop().catch((e) => {
+          console.error("Error during wallet retry loop", e);
+        });
+        this.wp.resolve(w);
+        return wrapResponse({
+          supported_protocol_versions: {
+            exchange: versions.WALLET_EXCHANGE_PROTOCOL_VERSION,
+            merchant: versions.WALLET_MERCHANT_PROTOCOL_VERSION,
+          },
+        });
+      }
+      case "getHistory": {
+        return wrapResponse({ history: [] });
+      }
+      case "startTunnel": {
+        // this.httpLib.useNfcTunnel = true;
+        throw Error("not implemented");
+      }
+      case "stopTunnel": {
+        // this.httpLib.useNfcTunnel = false;
+        throw Error("not implemented");
+      }
+      case "tunnelResponse": {
+        // httpLib.handleTunnelResponse(msg.args);
+        throw Error("not implemented");
+      }
+      case "reset": {
+        const oldArgs = this.walletArgs;
+        this.walletArgs = { ...oldArgs };
+        if (oldArgs && oldArgs.persistentStoragePath) {
+          try {
+            fs.unlinkSync(oldArgs.persistentStoragePath);
+          } catch (e) {
+            console.error("Error while deleting the wallet db:", e);
+          }
+          // Prevent further storage!
+          this.walletArgs.persistentStoragePath = undefined;
+        }
+        const wallet = await this.wp.promise;
+        wallet.stop();
+        this.wp = promiseUtil.openPromise<Wallet>();
+        this.maybeWallet = undefined;
+        const w = await getDefaultNodeWallet(this.walletArgs);
+        this.maybeWallet = w;
+        w.runRetryLoop().catch((e) => {
+          console.error("Error during wallet retry loop", e);
+        });
+        this.wp.resolve(w);
+        return wrapResponse({});
+      }
+      default: {
+        const wallet = await this.wp.promise;
+        return await walletCoreApi.handleCoreApiRequest(
+          wallet,
+          operation,
+          id,
+          args,
+        );
+      }
+    }
+  }
+}
+
+export function installAndroidWalletListener(): void {
+  const handler = new AndroidWalletMessageHandler();
+  const onMessage = async (msgStr: any): Promise<void> => {
+    if (typeof msgStr !== "string") {
+      console.error("expected string as message");
+      return;
+    }
+    const msg = JSON.parse(msgStr);
+    const operation = msg.operation;
+    if (typeof operation !== "string") {
+      console.error(
+        "message to android wallet helper must contain operation of type string",
+      );
+      return;
+    }
+    const id = msg.id;
+    console.log(`android listener: got request for ${operation} (${id})`);
+
+    try {
+      const respMsg = await handler.handleMessage(operation, id, msg.args);
+      console.log(
+        `android listener: sending success response for ${operation} (${id})`,
+      );
+      sendAkonoMessage(respMsg);
+    } catch (e) {
+      const respMsg: walletCoreApi.CoreApiResponse = {
+        type: "error",
+        id,
+        operation,
+        error: makeErrorDetails(
+          TalerErrorCode.WALLET_UNEXPECTED_EXCEPTION,
+          "unexpected exception",
+          {},
+        ),
+      };
+      sendAkonoMessage(respMsg);
+      return;
+    }
+  };
+
+  // @ts-ignore
+  globalThis.__akono_onMessage = onMessage;
+
+  console.log("android wallet listener installed");
+}