From cc4eeec0318def17ac966be2d0ad8547ce782bc7 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Fri, 16 Aug 2019 00:15:19 +0200
Subject: oops, actually pass arguments to emscripten

---
 src/crypto/synchronousWorker.ts | 91 +++++++++++++++++++++++------------------
 1 file changed, 51 insertions(+), 40 deletions(-)

(limited to 'src/crypto')

diff --git a/src/crypto/synchronousWorker.ts b/src/crypto/synchronousWorker.ts
index 4d1ff964c..c8ee3be19 100644
--- a/src/crypto/synchronousWorker.ts
+++ b/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.
@@ -64,52 +66,61 @@ export class SynchronousCryptoWorker {
       return this.cachedEmscEnvironmentPromise;
     }
 
-    // Make sure that TypeScript doesn't try
-    // to check the taler-emscripten-lib.
-    const indirectRequire = require;
+    const binaryPath =
+      __dirname + "/../../../emscripten/taler-emscripten-lib.wasm";
+    console.log("reading from", binaryPath);
+    const wasmBinary = new Uint8Array(fs.readFileSync(binaryPath));
 
-    const g = global;
+    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);
+        },
+      };
 
-    // unavoidable hack, so that emscripten detects
-    // the environment as node even though importScripts
-    // is present.
+      // Make sure that TypeScript doesn't try
+      // to check the taler-emscripten-lib.
+      const indirectRequire = require;
 
-    // @ts-ignore
-    const savedImportScripts = g.importScripts;
-    // @ts-ignore
-    delete g.importScripts;
+      const g = global;
 
-    // Assume that the code is run from the build/ directory.
-    const libFn = indirectRequire(
-      "../../../emscripten/taler-emscripten-lib.js",
-    );
-    const lib = libFn();
-    // @ts-ignore
-    g.importScripts = savedImportScripts;
+      // unavoidable hack, so that emscripten detects
+      // the environment as node even though importScripts
+      // is present.
 
-    if (!lib) {
-      throw Error("could not load taler-emscripten-lib.js");
-    }
+      // @ts-ignore
+      const savedImportScripts = g.importScripts;
+      // @ts-ignore
+      delete g.importScripts;
 
-    if (!lib.ccall) {
-      throw Error(
-        "sanity check failed: taler-emscripten lib does not have 'ccall'",
+      // Assume that the code is run from the build/ directory.
+      const libFn = indirectRequire(
+        "../../../emscripten/taler-emscripten-lib.js",
       );
-    }
-
-    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);
-      };
+      const lib = libFn(libArgs);
+      // @ts-ignore
+      g.importScripts = savedImportScripts;
+
+      if (!lib) {
+        throw Error("could not load taler-emscripten-lib.js");
+      }
+
+      if (!lib.ccall) {
+        throw Error(
+          "sanity check failed: taler-emscripten lib does not have 'ccall'",
+        );
+      }
     });
-    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);
     });
   }
-- 
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