export declare const CONTROL_REQUEST_TIMEOUT_MS = 8000;
export declare const EVENT_REQUEST_TIMEOUT_MS = 10000;
/** Internal error used to distinguish a bounded request from a generic network failure. */
export declare class RequestDeadlineError extends Error {
    readonly operation: string;
    readonly timeoutMs: number;
    readonly code: "request-timeout";
    constructor(operation: string, timeoutMs: number);
}
/**
 * Give one asynchronous request an absolute deadline. The race is deliberate:
 * it still settles when a browser, proxy, or test double ignores AbortSignal.
 */
export declare function withRequestDeadline<T>(operation: string, timeoutMs: number, run: (signal: AbortSignal) => Promise<T>, parentSignal?: AbortSignal): Promise<T>;
/** Size-aware media deadline with a hard upper bound. */
export declare function mediaRequestTimeoutMs(byteSize: number): number;
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