/** How early before rotation to refresh (30 seconds default) */
export declare const DEFAULT_REFRESH_BEFORE_MS: number;
/** Minimum refresh interval (don't refresh more than once per minute) */
export declare const MIN_REFRESH_INTERVAL_MS: number;
/** Fallback interval if no rotation time is known (5 minutes) */
export declare const FALLBACK_REFRESH_INTERVAL_MS: number;
/** Grace period polling: poll at 50% of remaining grace time if no WS event */
export declare const GRACE_PERIOD_POLL_RATIO = 0.5;
/** Minimum grace period poll delay (10 seconds) */
export declare const MIN_GRACE_POLL_DELAY_MS: number;
/** Heartbeat freshness monitor interval (60 seconds) */
export declare const HEARTBEAT_INTERVAL_MS: number;
/** Connection recovery delay after reconnect (2 seconds) */
export declare const RECONNECT_POLL_DELAY_MS: number;
/** Maximum retry attempts for rotation handling */
export declare const MAX_RETRY_ATTEMPTS = 5;
/** Rotation tracking state */
export interface RotationTracking {
    /** When we last received a WS rotation event */
    lastWsEventAt: number | null;
    /** When we last polled for rotation */
    lastPollAt: number | null;
    /** When rotation is expected */
    expectedRotationAt: number | null;
    /** When grace period ends */
    graceExpiresAt: number | null;
    /** Did we receive WS event for current rotation? */
    wsEventReceived: boolean;
    /** Count of rotations detected via polling (WS missed) */
    missedRotations: number;
}
/** Source of key refresh trigger */
export type RefreshSource = 'scheduled' | 'ws_event' | 'grace_poll' | 'reconnect' | 'heartbeat' | 'manual';
/** Managed key service state */
export interface ManagedKeyState {
    isRunning: boolean;
    currentKey: string | null;
    staleKeyDetected: boolean;
    onKeyChangedCallback: ((newKey: string) => void) | null;
}
/** Managed key status response */
export interface ManagedKeyStatus {
    isRunning: boolean;
    isManagedMode: boolean;
    staleKeyDetected: boolean;
    managedKeyName?: string;
    currentKeyPrefix?: string;
    nextRotationAt?: string;
    graceExpiresAt?: string;
    safetyRails: {
        lastWsEventAt: string | null;
        lastPollAt: string | null;
        wsEventReceived: boolean;
        missedRotations: number;
        graceRemainingMs: number | null;
    };
}
/** Create initial rotation tracking state */
export declare function createInitialRotationTracking(): RotationTracking;
/** Reset rotation tracking (preserves missedRotations for debugging) */
export declare function resetRotationTracking(tracking: RotationTracking): void;
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