export interface RetryConfig {
    readonly maxAttempts: number;
    readonly baseDelayMs: number;
    readonly maxDelayMs: number;
}
export declare const DEFAULT_RETRY_CONFIG: RetryConfig;
/**
 * Retry profile for long-lived voice-provider WebSockets (STT/TTS).
 *
 * Keeps the SAME fast first reconnect as the default (~125-250 ms) so a transient
 * blip during a live call recovers without dead air, but raises the backoff cap to
 * 10 s and allows more attempts so a persistent provider failure (rate limit /
 * outage) is retried patiently instead of giving up after ~2 s. This intentionally
 * does NOT use a multi-second *floor* (a 4 s first-retry would mean seconds of dead
 * air on a live call); "every 10 ms matters" applies to the first reconnect, patient
 * backoff applies only after repeated failures.
 */
export declare const VOICE_PROVIDER_RETRY_CONFIG: RetryConfig;
export declare const VOICE_PROVIDER_OUTAGE_RETRY_CONFIG: RetryConfig;
export declare function readRetryConfig(config: Record<string, unknown>): RetryConfig;
/** Read retry config for a voice-provider WebSocket; defaults to the patient-backoff profile. */
export declare function readProviderRetryConfig(config: Record<string, unknown>): RetryConfig;
export declare function retryDelayMs(attemptIndex: number, config: RetryConfig): number;
/**
 * Equal-jitter backoff: half the deterministic exponential delay plus a random half.
 * Spreads out retries so many sessions hitting the same provider rate/concurrency limit
 * at once don't reconnect in lockstep (thundering herd). `rng` is injectable for tests.
 */
export declare function retryDelayWithJitterMs(attemptIndex: number, config: RetryConfig, rng?: () => number): number;
export declare function waitForRetryDelay(attemptIndex: number, config: RetryConfig, signal?: AbortSignal): Promise<void>;
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