From 84488456de90643d05965f698f50c903b60e05ec Mon Sep 17 00:00:00 2001
From: dapplion <guillem.lion.benosa@gmail.com>
Date: Thu, 3 Dec 2020 00:24:30 +0000
Subject: [PATCH] Patch herumi's multiVerify() on browsers

---
 src/herumi/context.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/herumi/context.ts b/src/herumi/context.ts
index 7780283..5a56065 100644
--- a/src/herumi/context.ts
+++ b/src/herumi/context.ts
@@ -9,6 +9,16 @@ let blsGlobalPromise: Promise<void> | null = null;
 export async function setupBls(): Promise<void> {
   if (!blsGlobal) {
     await bls.init(bls.BLS12_381);
+
+    // Patch to fix multiVerify() calls on a browser with polyfilled NodeJS crypto
+    // @ts-ignore
+    if (typeof window === "object") {
+      // @ts-ignore
+      const crypto = window.crypto || window.msCrypto;
+      // @ts-ignore
+      bls.getRandomValues = (x) => crypto.getRandomValues(x);
+    }
+
     blsGlobal = bls;
   }
 }