/**
 * Per-request timeout for the post-callback provisioning phase (token exchange,
 * user-info, project discovery/onboarding, LRO polling). These Cloud Code
 * Assist calls normally settle in well under this window; a longer stall means
 * a hung endpoint that must surface a login error instead of hanging forever.
 * The callback server's own 300s deadline covers only the browser-callback wait
 * ({@link OAuthCallbackFlow}) and does not gate this phase.
 */
export declare const OAUTH_REQUEST_TIMEOUT_MS = 30000;
/** Options for {@link oauthFetch}. */
export interface OAuthFetchOptions {
    /** Provider id recorded on any {@link AIError.OAuthError} raised. */
    provider: string;
    /** Controller signal; when it aborts, the in-flight request is cancelled. */
    signal?: AbortSignal;
    /** Override the per-request timeout (defaults to {@link OAUTH_REQUEST_TIMEOUT_MS}). */
    timeoutMs?: number;
}
/**
 * Throw {@link AIError.LoginCancelledError} when the controller signal has
 * already aborted. Gates each provisioning round-trip, which the callback-wait
 * cancellation checks in {@link OAuthCallbackFlow} do not reach.
 */
export declare function throwIfLoginCancelled(signal: AbortSignal | undefined): void;
/**
 * `fetch` for the provisioning phase: composes the controller signal with a
 * per-request timeout so a stalled endpoint aborts instead of hanging login,
 * and user cancellation aborts the in-flight request. Cancellation surfaces as
 * {@link AIError.LoginCancelledError}; a timeout surfaces as an
 * {@link AIError.OAuthError} with `kind: "timeout"`.
 */
export declare function oauthFetch(url: string, init: RequestInit, { provider, signal, timeoutMs }: OAuthFetchOptions): Promise<Response>;