如何将联合类型指定为对象键Typescript

我需要一种键入对象的方法，其中键是特定类型的“事件”字段的值，而值是采用相同类型数据子类型的对象的回调数组。

我尝试使用映射类型，但是我是TypeScript的初学者，对此确实很挣扎。

// I have this type structure, where the event is always a string, but the data can be anything (but is constrained by the event)

interface EventTemplate {
  event: string;
  data: any;
}

export interface CreateEvent extends EventTemplate {
  event: 'create_game';
  data: {
    websocketID: 'string';
  };
}

export interface JoinEvent extends EventTemplate {
  event: 'join_game';
  data: {
    gameID: 'string';
  };
}

export interface MessageEvent extends EventTemplate {
  event: 'message';
  data: string;
}

export type WSEvent = CreateEvent | JoinEvent | MessageEvent;

// I want an object like this

type callbacks = {
  [key in WSEvent['event']]: ((data: WSEvent['data']) => void)[];
};

// Except that it forces the data structure to match with the key used. IE using a specific WSEvent rather than a generic one

// Something along the lines of:

type callbacks = {
  [key in (T extends WSEvent)['event']]: ((data: T['data']) => void)[];
};
// ...only valid..

const callbacks: callbacks = {
  // So this should be valid:
  message: [(data: MessageEvent['data']): void => {}, (data: MessageEvent['data']): void => {}],

  // But this should not be valid, as CreateEvent doesn't have the event 'join_game'
  join_game: [(data: CreateEvent['data']): void => {}],
};

如果有帮助，我很高兴对以上任何内容进行重组。