I'm working on a discord bot in typescript and instead of passing client as an argument everywhere I would much rather access it only with message.client or base.client since everything extends the base class. The only issue is whenever doing message.client I have to inform the compiler that the client class is my own DiscordClient class:

const client = message.client as DiscordClient
const client = interaction.client as DiscordClient //Another example

I have extended global types before in an express app i used so i know its possible but i think im extending the wrong class.

Correct way from an epxress app:

declare global {
  namespace Express {
    interface User extends PrismaUser {}
  }
}

I tried both capital letter and lowercase incase that was the issue but that did not fix it.

    declare global {
      namespace Base {
        interface client extends DiscordClient {}
        interface Client extends DiscordClient {}
      }
    }

This is the base class I am trying to extend from discord.js:

    export abstract class Base {
      public constructor(client: Client);
      public readonly client: Client;
      public toJSON(...props: Record<string, boolean | string>[]): unknown;
      public valueOf(): string;
    }

Edit: After looking into express library I found that I was extending an interface which is why it was working so I don't think the same would be possible for discord.js