import { Application } from 'express';
import { EventEmitter } from 'events';

declare function configureRateLimits(app: Application): Promise<void>;

interface TokenSecret {
    accessTokenSecret: string;
    isDevelopment: boolean;
}
type ConfigSource = () => Promise<TokenSecret>;

declare class ConfigManager extends EventEmitter {
    private config?;
    private configSource?;
    constructor();
    setConfigSource(source: ConfigSource): void;
    setConfig(cfg: TokenSecret): void;
    getConfig(): TokenSecret | undefined;
    loadConfig(): Promise<TokenSecret>;
}
declare const configManager: ConfigManager;

export { type ConfigSource, type TokenSecret, configManager, configureRateLimits };