import type { RelayConfigSchema } from '../schema/types.js';
export declare function generatePassphrase(wordCount?: number): string;
export interface RelaySession {
    sessionId: string;
    keyPair: CryptoKeyPair;
    passphrase: string;
    relayUrl: string;
}
export declare function createSession(relayBaseUrl: string, serverName: string, schema: RelayConfigSchema): Promise<RelaySession>;
export declare function pollForResult(relayBaseUrl: string, session: RelaySession, intervalMs?: number, timeoutMs?: number): Promise<Record<string, string>>;
export declare function sendMessage(relayBaseUrl: string, sessionId: string, message: {
    type: string;
    text: string;
    data?: Record<string, unknown>;
}): Promise<string>;
export declare function pollForResponses(relayBaseUrl: string, sessionId: string, messageId: string, intervalMs?: number, timeoutMs?: number): Promise<string>;
/**
 * Notify the browser that relay setup is complete, then clean up the session.
 *
 * The browser polls ``/api/sessions/:id/messages`` every 2s and stops on the
 * first ``type:'complete'`` message. If the caller deletes the session before
 * that poll lands, the browser sees 404 on its next fetch and the UI stalls
 * on "Waiting for server...". This helper sends the ``complete`` message,
 * then schedules the DELETE after a grace period long enough to cover a few
 * poll cycles, and unref's the cleanup timer so it doesn't block process
 * shutdown. If the process exits before the timer fires, the relay server's
 * 10-minute TTL reclaims the session.
 *
 * Errors from ``sendMessage`` are logged via ``console.error`` and swallowed
 * — the helper is a best-effort post-setup notification and must not fail
 * the caller's primary flow.
 */
export declare function notifyComplete(relayBaseUrl: string, sessionId: string, text?: string, options?: {
    gracePeriodMs?: number;
}): Promise<void>;
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