oops, actually pass arguments to emscripten

package.json

@@ -1,6 +1,6 @@
 {
   "name": "taler-wallet",
-  "version": "0.0.3",
+  "version": "0.0.4",
   "description": "",
   "main": "dist/node/index.js",
   "repository": {

src/crypto/synchronousWorker.ts

@@ -24,7 +24,9 @@ import fs = require("fs");
  */
 export class SynchronousCryptoWorker {
   private cachedEmscEnvironment: EmscEnvironment | undefined = undefined;
-  private cachedEmscEnvironmentPromise: Promise<EmscEnvironment> | undefined = undefined;
+  private cachedEmscEnvironmentPromise:
+    | Promise<EmscEnvironment>
+    | undefined = undefined;
 
   /**
    * Function to be called when we receive a message from the worker thread.
@@ -64,6 +66,28 @@ export class SynchronousCryptoWorker {
       return this.cachedEmscEnvironmentPromise;
     }
 
+    const binaryPath =
+      __dirname + "/../../../emscripten/taler-emscripten-lib.wasm";
+    console.log("reading from", binaryPath);
+    const wasmBinary = new Uint8Array(fs.readFileSync(binaryPath));
+
+    let lib: any;
+
+    return new Promise((resolve, reject) => {
+      // Arguments passed to the emscripten prelude
+      const libArgs = {
+        wasmBinary,
+        onRuntimeInitialized: () => {
+          if (!lib) {
+            console.error("fatal emscripten initialization error");
+            return;
+          }
+          this.cachedEmscEnvironmentPromise = undefined;
+          this.cachedEmscEnvironment = new EmscEnvironment(lib);
+          resolve(this.cachedEmscEnvironment);
+        },
+      };
+
       // Make sure that TypeScript doesn't try
       // to check the taler-emscripten-lib.
       const indirectRequire = require;
@@ -83,7 +107,7 @@ export class SynchronousCryptoWorker {
       const libFn = indirectRequire(
         "../../../emscripten/taler-emscripten-lib.js",
       );
-    const lib = libFn();
+      const lib = libFn(libArgs);
       // @ts-ignore
       g.importScripts = savedImportScripts;
 
@@ -96,20 +120,7 @@ export class SynchronousCryptoWorker {
           "sanity check failed: taler-emscripten lib does not have 'ccall'",
         );
       }
-
-    const binaryPath = __dirname + "/../../../emscripten/taler-emscripten-lib.wasm";
-    console.log("reading from", binaryPath);
-    const wasmBinary = new Uint8Array(fs.readFileSync(binaryPath));
-
-    this.cachedEmscEnvironmentPromise = new Promise((resolve, reject) => {
-      lib.wasmBinary = wasmBinary;
-      lib.onRuntimeInitialized = () => {
-        this.cachedEmscEnvironmentPromise = undefined;
-        this.cachedEmscEnvironment = new EmscEnvironment(lib);
-        resolve(this.cachedEmscEnvironment);
-      };
     });
-    return this.cachedEmscEnvironmentPromise;
   }
 
   private dispatchMessage(msg: any) {
@@ -157,7 +168,7 @@ export class SynchronousCryptoWorker {
       return;
     }
 
-    this.handleRequest(operation, id, args).catch((e) => {
+    this.handleRequest(operation, id, args).catch(e => {
       console.error("Error while handling crypto request:", e);
     });
   }