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diff --git a/lib/wallet/wxMessaging.ts b/lib/wallet/wxMessaging.ts
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+/*
+ This file is part of TALER
+ (C) 2016 GNUnet e.V.
+
+ 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.
+
+ 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
+ TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
+ */
+
+
+import {Wallet, Offer, Badge, ConfirmReserveRequest, CreateReserveRequest} from "./wallet";
+import {deleteDb, exportDb, openTalerDb} from "./db";
+import {BrowserHttpLib} from "./http";
+import {Checkable} from "./checkable";
+import {AmountJson} from "./types";
+import Port = chrome.runtime.Port;
+import {Notifier} from "./types";
+import {Contract} from "./wallet";
+
+"use strict";
+
+/**
+ * Messaging for the WebExtensions wallet. Should contain
+ * parts that are specific for WebExtensions, but as little business
+ * logic as possible.
+ *
+ * @author Florian Dold
+ */
+
+
+type Handler = (detail: any) => Promise<any>;
+
+function makeHandlers(db: IDBDatabase,
+ wallet: Wallet): {[msg: string]: Handler} {
+ return {
+ ["balances"]: function(detail) {
+ return wallet.getBalances();
+ },
+ ["dump-db"]: function(detail) {
+ return exportDb(db);
+ },
+ ["reset"]: function(detail) {
+ let tx = db.transaction(db.objectStoreNames, 'readwrite');
+ for (let i = 0; i < db.objectStoreNames.length; i++) {
+ tx.objectStore(db.objectStoreNames[i]).clear();
+ }
+ deleteDb();
+
+ chrome.browserAction.setBadgeText({text: ""});
+ console.log("reset done");
+ // Response is synchronous
+ return Promise.resolve({});
+ },
+ ["create-reserve"]: function(detail) {
+ const d = {
+ mint: detail.mint,
+ amount: detail.amount,
+ };
+ const req = CreateReserveRequest.checked(d);
+ return wallet.createReserve(req);
+ },
+ ["confirm-reserve"]: function(detail) {
+ // TODO: make it a checkable
+ const d = {
+ reservePub: detail.reservePub
+ };
+ const req = ConfirmReserveRequest.checked(d);
+ return wallet.confirmReserve(req);
+ },
+ ["confirm-pay"]: function(detail) {
+ let offer;
+ try {
+ offer = Offer.checked(detail.offer);
+ } catch (e) {
+ if (e instanceof Checkable.SchemaError) {
+ console.error("schema error:", e.message);
+ return Promise.resolve({
+ error: "invalid contract",
+ hint: e.message,
+ detail: detail
+ });
+ } else {
+ throw e;
+ }
+ }
+
+ return wallet.confirmPay(offer);
+ },
+ ["execute-payment"]: function(detail) {
+ return wallet.executePayment(detail.H_contract);
+ },
+ ["mint-info"]: function(detail) {
+ if (!detail.baseUrl) {
+ return Promise.resolve({error: "bad url"});
+ }
+ return wallet.updateMintFromUrl(detail.baseUrl);
+ },
+ ["reserve-creation-info"]: function(detail) {
+ if (!detail.baseUrl || typeof detail.baseUrl !== "string") {
+ return Promise.resolve({error: "bad url"});
+ }
+ let amount = AmountJson.checked(detail.amount);
+ return wallet.getReserveCreationInfo(detail.baseUrl, amount);
+ },
+ ["check-repurchase"]: function(detail) {
+ let contract = Contract.checked(detail.contract);
+ return wallet.checkRepurchase(contract);
+ },
+ ["get-history"]: function(detail) {
+ // TODO: limit history length
+ return wallet.getHistory();
+ },
+ };
+}
+
+
+class ChromeBadge implements Badge {
+ setText(s: string) {
+ chrome.browserAction.setBadgeText({text: s});
+ }
+
+ setColor(c: string) {
+ chrome.browserAction.setBadgeBackgroundColor({color: c});
+ }
+}
+
+
+function dispatch(handlers, req, sendResponse) {
+ if (req.type in handlers) {
+ Promise
+ .resolve()
+ .then(() => {
+ const p = handlers[req.type](req.detail);
+
+ return p.then((r) => {
+ sendResponse(r);
+ })
+ })
+ .catch((e) => {
+ console.log(`exception during wallet handler for '${req.type}'`);
+ console.log("request", req);
+ console.error(e);
+ sendResponse({
+ error: "exception",
+ hint: e.message,
+ stack: e.stack.toString()
+ });
+ });
+ // The sendResponse call is async
+ return true;
+ } else {
+ console.error(`Request type ${JSON.stringify(req)} unknown, req ${req.type}`);
+ sendResponse({error: "request unknown"});
+ // The sendResponse call is sync
+ return false;
+ }
+}
+
+class ChromeNotifier implements Notifier {
+ ports: Port[] = [];
+
+ constructor() {
+ chrome.runtime.onConnect.addListener((port) => {
+ console.log("got connect!");
+ this.ports.push(port);
+ port.onDisconnect.addListener(() => {
+ let i = this.ports.indexOf(port);
+ if (i >= 0) {
+ this.ports.splice(i, 1);
+ } else {
+ console.error("port already removed");
+ }
+ });
+ });
+ }
+
+ notify() {
+ console.log("notifying all ports");
+ for (let p of this.ports) {
+ p.postMessage({notify: true});
+ }
+ }
+}
+
+
+export function wxMain() {
+ chrome.browserAction.setBadgeText({text: ""});
+
+ Promise.resolve()
+ .then(() => {
+ return openTalerDb();
+ })
+ .catch((e) => {
+ console.error("could not open database");
+ console.error(e);
+ })
+ .then((db) => {
+ let http = new BrowserHttpLib();
+ let badge = new ChromeBadge();
+ let notifier = new ChromeNotifier();
+ let wallet = new Wallet(db, http, badge, notifier);
+ let handlers = makeHandlers(db, wallet);
+ chrome.runtime.onMessage.addListener((req, sender, sendResponse) => {
+ try {
+ return dispatch(handlers, req, sendResponse)
+ } catch (e) {
+ console.log(`exception during wallet handler (dispatch)`);
+ console.log("request", req);
+ console.error(e);
+ sendResponse({
+ error: "exception",
+ hint: e.message,
+ stack: e.stack.toString()
+ });
+ return false;
+ }
+ });
+ })
+ .catch((e) => {
+ console.error("could not initialize wallet messaging");
+ console.error(e);
+ });
+} \ No newline at end of file