13 files changed, 104 insertions, 50 deletions
diff --git a/emscripten/README b/emscripten/README
new file mode 100644
index 000000000..e13ea8ed1
--- /dev/null
+++ b/emscripten/README
@@ -0,0 +1,4 @@
+The taler-emscripten-lib.js is compiled from C using emscripten.
+
+See https://git.taler.net/libtalerutil-emscripten.git for automated build
+instructions and the functions exported from this module.
diff --git a/src/emscripten/taler-emscripten-lib.js b/emscripten/taler-emscripten-lib.js
index dcbea842c..dcbea842c 100644
--- a/src/emscripten/taler-emscripten-lib.js
+++ b/emscripten/taler-emscripten-lib.js
diff --git a/gulpfile.js b/gulpfile.js
index ec8321dc0..568300614 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -53,7 +53,7 @@ const po2json = require("po2json");
 const paths = {
   ts: {
     src: [
-      "src/**/*.{ts,tsx}",
+      "src/**/*.{ts,tsx,js}",
       "!src/**/*-test*.ts",
     ],
     decl: [
@@ -112,6 +112,8 @@ const tsBaseArgs = {
   strict: true,
   outDir: "build/src/",
   noImplicitAny: true,
+  allowJs: true,
+  checkJs: true,
 };
 
 
diff --git a/src/cryptoApi-test.ts b/src/crypto/cryptoApi-test.ts
index 8350defbc..89b74d776 100644
--- a/src/cryptoApi-test.ts
+++ b/src/crypto/cryptoApi-test.ts
@@ -1,5 +1,5 @@
 import {CryptoApi} from "./cryptoApi";
-import {ReserveRecord, DenominationRecord, DenominationStatus} from "./types";
+import {ReserveRecord, DenominationRecord, DenominationStatus} from "../types";
 import {test, TestLib} from "talertest";
 
 let masterPub1: string = "CQQZ9DY3MZ1ARMN5K1VKDETS04Y2QCKMMCFHZSWJWWVN82BTTH00";
diff --git a/src/cryptoApi.ts b/src/crypto/cryptoApi.ts
index 45efb63e3..a386eab42 100644
--- a/src/cryptoApi.ts
+++ b/src/crypto/cryptoApi.ts
@@ -33,11 +33,11 @@ import {
   RefreshSessionRecord,
   WireFee,
   PayCoinInfo,
-} from "./types";
+} from "../types";
 import {
   OfferRecord,
   CoinWithDenom,
-} from "./wallet";
+} from "../wallet";
 
 
 /**
diff --git a/src/cryptoWorker.ts b/src/crypto/cryptoWorker.ts
index bf802a32b..36b3b924a 100644
--- a/src/cryptoWorker.ts
+++ b/src/crypto/cryptoWorker.ts
@@ -22,27 +22,34 @@
 /**
  * Imports.
  */
-import * as native from "./emscriptif";
 import {
-  PreCoinRecord,
-  PayCoinInfo,
   AmountJson,
-  RefreshSessionRecord,
-  RefreshPreCoinRecord,
-  ReserveRecord,
+  Amounts,
+  CoinPaySig,
+  CoinRecord,
   CoinStatus,
+  DenominationRecord,
+  PayCoinInfo,
   PaybackRequest,
-} from "./types";
+  PreCoinRecord,
+  RefreshPreCoinRecord,
+  RefreshSessionRecord,
+  ReserveRecord,
+  WireFee,
+} from "../types";
 import create = chrome.alarms.create;
-import {OfferRecord} from "./wallet";
-import {CoinWithDenom} from "./wallet";
-import {CoinPaySig, CoinRecord} from "./types";
-import {DenominationRecord, Amounts, WireFee} from "./types";
-import {Amount} from "./emscriptif";
-import {HashContext} from "./emscriptif";
-import {RefreshMeltCoinAffirmationPS} from "./emscriptif";
-import {EddsaPublicKey} from "./emscriptif";
-import {HashCode} from "./emscriptif";
+import {
+  CoinWithDenom,
+  OfferRecord,
+} from "../wallet";
+import * as native from "./emscInterface";
+import {
+  Amount,
+  EddsaPublicKey,
+  HashCode,
+  HashContext,
+  RefreshMeltCoinAffirmationPS,
+} from "./emscInterface";
 
 
 namespace RpcFunctions {
diff --git a/src/emscriptif-test.ts b/src/crypto/emscInterface-test.ts
index 8b7a9eff4..4f57bf802 100644
--- a/src/emscriptif-test.ts
+++ b/src/crypto/emscInterface-test.ts
@@ -1,5 +1,5 @@
 import {test, TestLib} from "talertest";
-import * as native from "./emscriptif";
+import * as native from "./emscInterface";
 
 test("string hashing", (t: TestLib) => {
   let x = native.ByteArray.fromStringWithNull("hello taler");
diff --git a/src/emscriptif.ts b/src/crypto/emscInterface.ts
index 60653b66e..52c6c965e 100644
--- a/src/emscriptif.ts
+++ b/src/crypto/emscInterface.ts
@@ -26,8 +26,11 @@
 /**
  * Imports.
  */
-import {AmountJson} from "./types";
-import * as emscLib from "./emscripten/taler-emscripten-lib";
+import {AmountJson} from "../types";
+import {getLib, EmscFunGen} from "./emscLoader";
+
+
+const emscLib = getLib();
 
 
 /**
@@ -45,7 +48,7 @@ const GNUNET_SYSERR = -1;
 /**
  * Get an emscripten-compiled function.
  */
-const getEmsc: emscLib.EmscFunGen = (name: string, ret: any, argTypes: any[]) => {
+const getEmsc: EmscFunGen = (name: string, ret: any, argTypes: any[]) => {
   return (...args: any[]) => {
     return emscLib.ccall(name, ret, argTypes, args);
   }
diff --git a/src/emscripten/taler-emscripten-lib.d.ts b/src/crypto/emscLoader.d.ts
index 25cfc623e..e46ed7f13 100644
--- a/src/emscripten/taler-emscripten-lib.d.ts
+++ b/src/crypto/emscLoader.d.ts
@@ -14,6 +14,9 @@
  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
  */
 
+
+declare function getLib(): EmscLib;
+
 export interface EmscFunGen {
   (name: string,
    ret: string,
@@ -30,23 +33,22 @@ export interface EmscFunGen {
 }
 
 
-export var cwrap: EmscFunGen;
+interface EmscLib {
+  cwrap: EmscFunGen;
 
-export function ccall(name: string, ret:"number"|"string", argTypes: any[], args: any[]): any
+  ccall(name: string, ret:"number"|"string", argTypes: any[], args: any[]): any
 
-export function stringToUTF8(s: string, addr: number, maxLength: number): void
+  stringToUTF8(s: string, addr: number, maxLength: number): void
 
-export function _free(ptr: number): void;
+  _free(ptr: number): void;
 
-export function _malloc(n: number): number;
+  _malloc(n: number): number;
 
-export function Pointer_stringify(p: number, len?: number): string;
+  Pointer_stringify(p: number, len?: number): string;
 
-export function getValue(ptr: number, type: string, noSafe?: boolean): number;
+  getValue(ptr: number, type: string, noSafe?: boolean): number;
 
-export function setValue(ptr: number, value: number, type: string,
-  noSafe?: boolean): void;
+  setValue(ptr: number, value: number, type: string, noSafe?: boolean): void;
 
-export function writeStringToMemory(s: string,
-  buffer: number,
-  dontAddNull?: boolean): void;
+  writeStringToMemory(s: string, buffer: number, dontAddNull?: boolean): void;
+}
diff --git a/src/crypto/emscLoader.js b/src/crypto/emscLoader.js
new file mode 100644
index 000000000..723b8ae36
--- /dev/null
+++ b/src/crypto/emscLoader.js
@@ -0,0 +1,38 @@
+/*
+ This file is part of TALER
+ (C) 2017 Inria and 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, see <http://www.gnu.org/licenses/>
+ */
+
+
+// @ts-nocheck
+
+/**
+ * Load the taler emscripten lib.
+ *
+ * If in a WebWorker, importScripts is used.  Inside a browser,
+ * the module must be globally available.
+ */
+export default function getLib() {
+  if (window.TalerEmscriptenLib) {
+    return TalerEmscriptenLib;
+  }
+  if (importScripts) {
+    importScripts('/src/emscripten/taler-emscripten-lib.js')
+    if (TalerEmscriptenLib) {
+      throw Error("can't import TalerEmscriptenLib");
+    }
+    return TalerEmscriptenLib
+  }
+  throw Error("Can't find TalerEmscriptenLib.");
+}
diff --git a/src/wallet.ts b/src/wallet.ts
index f48fcc76e..a2a9e83f5 100644
--- a/src/wallet.ts
+++ b/src/wallet.ts
@@ -72,7 +72,7 @@ import {
   flatMap,
   getTalerStampSec,
 } from "./helpers";
-import {CryptoApi} from "./cryptoApi";
+import {CryptoApi} from "./crypto/cryptoApi";
 import URI = require("urijs");
 
 
diff --git a/tsconfig.json b/tsconfig.json
index 7409f2b81..0c684214e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -14,7 +14,9 @@
     "noFallthroughCasesInSwitch": true,
     "strict": true,
     "outDir": "build/src/",
-    "noImplicitAny": true
+    "noImplicitAny": true,
+    "allowJs": true,
+    "checkJs": true
   },
   "files": [
     "decl/chrome/chrome.d.ts",
@@ -25,12 +27,13 @@
     "src/chromeBadge.ts",
     "src/components.ts",
     "src/content_scripts/notify.ts",
-    "src/cryptoApi-test.ts",
-    "src/cryptoApi.ts",
-    "src/cryptoWorker.ts",
-    "src/emscripten/taler-emscripten-lib.d.ts",
-    "src/emscriptif-test.ts",
-    "src/emscriptif.ts",
+    "src/crypto/cryptoApi-test.ts",
+    "src/crypto/cryptoApi.ts",
+    "src/crypto/cryptoWorker.ts",
+    "src/crypto/emscInterface-test.ts",
+    "src/crypto/emscInterface.ts",
+    "src/crypto/emscLoader.d.ts",
+    "src/crypto/emscLoader.js",
     "src/helpers-test.ts",
     "src/helpers.ts",
     "src/http.ts",
diff --git a/webpack.config.js b/webpack.config.js
index a99d2a7c8..deca2ae76 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -34,13 +34,8 @@ module.exports = function (env) {
     base.plugins.push(new webpack.LoaderOptionsPlugin({minimize: true}));
   }
   const configWebWorker = {
-    entry: {"cryptoWorker": "./src/cryptoWorker.ts"},
+    entry: {"cryptoWorker": "./src/crypto/cryptoWorker.ts"},
     target: "webworker",
-    externals: {
-      // A big hack to load taler-emscripten-lib from the environment,
-      // because we exclude it from the bundle.
-      "./emscripten/taler-emscripten-lib": "(self.TalerEmscriptenLib = {}, importScripts('/src/emscripten/taler-emscripten-lib.js'), TalerEmscriptenLib)",
-    },
   };
 
   const configBackground = {