/**
 * The device code timed out — the person did not finish in the browser inside the window.
 *
 * Named, because a BARE Error is PLATFORM under `failureFrom` ("Clustly's server, the network, or
 * something we did not classify failed; your input was fine") and this is nobody's failure but the
 * clock's. Production 2026-09-20 filed it as a red ours-to-fix issue on a builder who simply took
 * too long. `platformOutage()` below is the case that genuinely IS ours, and stays a bare Error.
 */
export declare class DeviceCodeExpiredError extends Error {
    constructor();
}
/**
 * CLI half of the RFC 8628 device flow (design: docs/designs/clustly-cli.md §4; build-plan
 * 3.3) — the cross-machine path: works from any browser on any device, which is exactly what
 * a pasted loopback URL cannot do. Polls with the server-given interval and switches on the
 * §3.5 error codes.
 */
export interface DeviceStart {
    deviceCode: string;
    userCode: string;
    verificationUri: string;
    expiresInS: number;
    intervalS: number;
}
export interface IssuedKey {
    apiKey: string;
    keyPrefix: string;
}
type Fetch = typeof fetch;
type Sleep = (ms: number) => Promise<void>;
/** Consecutive polls that got no usable answer before the outage is named as Clustly's (2 min at 5 s). */
export declare const MAX_CONSECUTIVE_POLL_FAILURES = 24;
export declare function startDevice(apiBase: string, fetchFn?: Fetch): Promise<DeviceStart>;
/** Poll until approved/denied/expired. Resolves with the freshly minted key. */
export declare function pollDevice(apiBase: string, start: DeviceStart, fetchFn?: Fetch, sleep?: Sleep): Promise<IssuedKey>;
export {};