for libraries like Discord.js or Hikari.
Ensure your bot library (like Wavelink or Lavalink-Client) matches the Lavalink version of the node (v3 vs v4). lavalink hosting free link
To connect to a Lavalink node, you need an IP, a Port, and a Password. If you use a public node, you are trusting the host with your data stream. for libraries like Discord