fix: proper browser env check...

src/utils/utils.ts

@@ -78,9 +78,11 @@ export function bufToBn(buf: Buffer) {
 }
 
 export function isomorphicRandomUUID() {
-  if (self.crypto) {
+  if (isBrowser() && self.crypto) {
     return self.crypto.randomUUID();
   } else {
     return randomUUID();
   }
 }
+
+const isBrowser = new Function("try {return this===window;}catch(e){ return false;}");