export type CircuitState = "closed" | "open" | "half_open";
export interface CircuitBreakerConfig {
    threshold: number;
    resetAfter: number;
    fallback?: (...args: unknown[]) => unknown;
}
export declare class CircuitBreaker {
    private readonly config;
    private _state;
    private consecutiveFailures;
    private lastFailureTime;
    private _probeInFlight;
    private readonly nodeName;
    constructor(config: CircuitBreakerConfig, nodeName?: string);
    get state(): CircuitState;
    execute<T>(fn: () => Promise<T>): Promise<T>;
    private onSuccess;
    private onFailure;
    reset(): void;
}
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