slotSubscribe on Solana

# Connect (header auth works from Node/CLI clients):
wscat -c "wss://rpc.goldrushdata.com/v1/solana-mainnet" \
  -H "Authorization: Bearer $GOLDRUSH_API_KEY"

# Once connected, send:
{"jsonrpc":"2.0","id":1,"method":"slotSubscribe","params":[]}

import { createSolanaRpcSubscriptions } from "@solana/kit";

// Authenticate with the Authorization: Bearer header on the WS handshake.
// See /goldrush-json-rpc/authentication.
const rpcSubscriptions = createSolanaRpcSubscriptions("wss://rpc.goldrushdata.com/v1/solana-mainnet");

const abortController = new AbortController();
const notifications = await rpcSubscriptions
  .slotSubscribe()
  .subscribe({ abortSignal: abortController.signal });

for await (const notification of notifications) {
  console.log(notification);
}