import { P2PDerivedTiming } from '../Loaders/P2PDerivedTiming';
/** What the XHR P2P branch knows about one segment while it waits for peer bytes. */
export interface P2PWaitState {
    /** V2 outcome: 'peer' once a peer was asked, 'cdn' once V2 gave up, undefined while the election runs. */
    dispatch?: 'peer' | 'cdn';
    /** When the peer was asked (ms epoch), 0 when no peer was asked. */
    requestedAt: number;
    /** When the XHR started waiting (ms epoch). */
    startedAt: number;
    /** Bytes received from the peer so far. */
    receivedBytes: number;
}
/**
 * Whether the XHR P2P branch should stop waiting for peer bytes and go to the CDN, and why; '' means keep
 * waiting. Android `P2pProvider.fetch` timing: as soon as no peer is elected the request goes to the CDN;
 * with a peer, the first byte must arrive within `firstByteTimeoutMs` of asking it and the whole segment
 * within `fallbackBudgetMs`. If V2 has not decided after one election window plus one first-byte wait,
 * the request stops waiting too.
 */
export declare function p2pWaitGiveUpReason(state: P2PWaitState, timing: P2PDerivedTiming, now: number): string;