Robustify providerFromEngine callback type check (#76)

MetaMask · Mar 12, 2021 · aa70ced · aa70ced
1 parent 3eb4f1a
commit aa70ced
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/providerFromEngine.ts b/src/providerFromEngine.ts
@@ -14,8 +14,8 @@ function providerFromEngine(engine: JsonRpcEngine): SafeEventEmitterProvider {
   // handle both rpc send methods
   provider.sendAsync = engine.handle.bind(engine);
   provider.send = (req: JsonRpcRequest<string[]>, callback: VoidFunction) => {
-    if (!callback) {
-      throw new Error('Web3 Provider - must provider callback to "send" method');
+    if (typeof callback !== 'function') {
+      throw new Error('Must provide callback to "send" method.');
     }
     engine.handle(req, callback);
   };