programUnsubscribe 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":"programUnsubscribe","params":[24040]}

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

// With @solana/kit you don't call programUnsubscribe directly. Abort the
// subscription's AbortController and the client sends the unsubscribe
// frame for you:
const abortController = new AbortController();
// ... later:
abortController.abort();