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/*
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 } from "../wallet";
import {
getDefaultNodeWallet,
withdrawTestBalance,
DefaultNodeWalletArgs,
NodeHttpLib,
} from "../headless/helpers";
import { openPromise, OpenedPromise } from "../promiseUtils";
import fs = require("fs");
import axios from "axios";
import { HttpRequestLibrary, HttpResponse } from "../http";
import querystring = require("querystring");
export class AndroidHttpLib implements HttpRequestLibrary {
useNfcTunnel: boolean = false;
private nodeHttpLib: HttpRequestLibrary = new NodeHttpLib();
private requestId = 1;
private requestMap: { [id: number]: OpenedPromise<HttpResponse> } = {};
constructor(private sendMessage: (m: string) => void) {}
get(url: string): Promise<HttpResponse> {
if (this.useNfcTunnel) {
const myId = this.requestId++;
const p = openPromise<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);
}
}
postJson(url: string, body: any): Promise<import("../http").HttpResponse> {
if (this.useNfcTunnel) {
const myId = this.requestId++;
const p = openPromise<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);
}
}
postForm(url: string, form: any): Promise<import("../http").HttpResponse> {
if (this.useNfcTunnel) {
const myId = this.requestId++;
const p = openPromise<HttpResponse>();
this.requestMap[myId] = p;
const request = {
method: "postForm",
url,
form,
};
this.sendMessage(
JSON.stringify({ type: "tunnelHttp", request, id: myId }),
);
return p.promise;
} else {
return this.nodeHttpLib.postForm(url, form);
}
}
handleTunnelResponse(msg: any) {
const myId = msg.id;
const p = this.requestMap[myId];
if (!p) {
console.error(`no matching request for tunneled HTTP response, id=${myId}`);
}
if (msg.status == 200) {
p.resolve({ responseJson: msg.responseJson, status: msg.status });
} else {
p.reject(new Error(`unexpected HTTP status code ${msg.status}`));
}
delete this.requestMap[myId];
}
}
export function installAndroidWalletListener() {
// @ts-ignore
const sendMessage: (m: string) => void = global.__akono_sendMessage;
if (typeof sendMessage !== "function") {
const errMsg =
"FATAL: cannot install android wallet listener: akono functions missing";
console.error(errMsg);
throw new Error(errMsg);
}
let maybeWallet: Wallet | undefined;
let wp = openPromise<Wallet>();
let httpLib = new AndroidHttpLib(sendMessage);
let walletArgs: DefaultNodeWalletArgs | undefined;
const onMessage = async (msgStr: any) => {
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;
let result;
switch (operation) {
case "init": {
walletArgs = {
notifyHandler: async () => {
sendMessage(JSON.stringify({ type: "notification" }));
},
persistentStoragePath: msg.args.persistentStoragePath,
httpLib: httpLib,
};
maybeWallet = await getDefaultNodeWallet(walletArgs);
wp.resolve(maybeWallet);
result = true;
break;
}
case "getBalances": {
const wallet = await wp.promise;
result = await wallet.getBalances();
break;
}
case "withdrawTestkudos": {
const wallet = await wp.promise;
result = await withdrawTestBalance(wallet);
break;
}
case "preparePay": {
const wallet = await wp.promise;
result = await wallet.preparePay(msg.args.url);
break;
}
case "confirmPay": {
const wallet = await wp.promise;
result = await wallet.confirmPay(msg.args.proposalId, undefined);
break;
}
case "startTunnel": {
httpLib.useNfcTunnel = true;
break;
}
case "stopTunnel": {
httpLib.useNfcTunnel = false;
break;
}
case "tunnelResponse": {
httpLib.handleTunnelResponse(msg.args);
break;
}
case "reset": {
const wallet = await wp.promise;
wallet.stop();
wp = openPromise<Wallet>();
if (walletArgs && walletArgs.persistentStoragePath) {
try {
fs.unlinkSync(walletArgs.persistentStoragePath);
} catch (e) {
console.error("Error while deleting the wallet db:", e);
}
// Prevent further storage!
walletArgs.persistentStoragePath = undefined;
}
maybeWallet = undefined;
break;
}
default:
console.error(`operation "${operation}" not understood`);
return;
}
const respMsg = { result, id, operation, type: "response" };
console.log("sending message back", respMsg);
sendMessage(JSON.stringify(respMsg));
};
// @ts-ignore
globalThis.__akono_onMessage = onMessage;
console.log("android wallet listener installed");
}
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