discord.js/packages/rest/src/lib/handlers/IHandler.ts

import type { RequestInit } from 'node-fetch';
import type { InternalRequest, RouteData } from '../RequestManager';

export interface IHandler {
	queueRequest: (
		routeId: RouteData,
		url: string,
		options: RequestInit,
		bodyData: Pick<InternalRequest, 'files' | 'body'>,
	) => Promise<unknown>;
}