/**
 * Throttle Helpers
 *
 * Rate limiting utilities for OAuth operations.
 */
export declare function keyFor(providerType: string, tokenFile?: string): string;
export declare function shouldThrottle(k: string, ms?: number): boolean;
export declare function updateThrottle(k: string): void;
export declare const inFlight: {
    has: (key: string) => boolean;
    get: (key: string) => Promise<void> | undefined;
    set: (key: string, promise: Promise<void>) => Map<string, Promise<void>>;
    delete: (key: string) => boolean;
};
export declare const lastRunAt: {
    get: (key: string) => number | undefined;
    set: (key: string, value: number) => Map<string, number>;
};
export declare const interactiveTail: {
    readonly current: Promise<void>;
    next: Promise<void>;
};