diff --git a/src/index.ts b/src/index.ts
index 86dd5c9..56fd16e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -13,47 +13,6 @@ const EXECUTION_RPC_URL =
 
 const CONSENSUS_RPC_URL = "https://www.lightclientdata.org";
 
-const RPC_CACHE = new NodeCache({ stdTTL: 60 * 60 * 12 });
-
-async function doFetch(url: string, request: RequestInit) {
-  sanitizeRequestArgs(url, request);
-
-  let req = new Request(url, {
-    ...request,
-    headers: {
-      "Content-Type": "application/json",
-    },
-  });
-
-  const resp = await fetch(req);
-
-  return (await resp.json()) as any;
-}
-
-function sanitizeRequestArgs(url: string, request: RequestInit) {
-  if (!request || typeof request !== "object") {
-    throw Error("invalid request");
-  }
-
-  [
-    "agent",
-    "hostname",
-    "referrer",
-    "referrerPolicy",
-    "compress",
-    "port",
-    "protocol",
-    "hostname",
-    "insecureHTTPParser",
-    "highWaterMark",
-    "size",
-  ].forEach((element) => {
-    if (element in request) {
-      delete request[element];
-    }
-  });
-}
-
 interface ExecutionRequest {
   method: string;
   params: any[];
@@ -197,11 +156,8 @@ const plugin: Plugin = {
     api.registerMethod("consensus_optimistic_update", {
       cacheable: false,
       async handler(): Promise<object> {
-        return await doFetch(
-          `${CONSENSUS_RPC_URL}/eth/v1/beacon/light_client/optimistic_update`,
-          {
-            method: "GET",
-          }
+        return await handleGETRequest(
+          `${CONSENSUS_RPC_URL}/eth/v1/beacon/light_client/optimistic_update`
         );
       },
     });