export interface UserAuth {
    token: string;
    login: string;
    authorized_at: string;
}
export interface PendingDeviceFlow {
    device_code: string;
    user_code: string;
    verification_uri: string;
    expires_at: number;
    interval: number;
}
export type AuthState = {
    kind: "auth";
    auth: UserAuth;
} | {
    kind: "pending";
    pending: PendingDeviceFlow;
};
export declare class OAuthClientNotConfiguredError extends Error {
    constructor();
}
export declare function readUserAuth(): Promise<UserAuth | null>;
export declare function writeUserAuth(auth: UserAuth): Promise<void>;
export declare function clearUserAuth(): Promise<void>;
export declare function startDeviceFlow(): Promise<PendingDeviceFlow>;
export type ExchangeResult = {
    kind: "auth";
    auth: UserAuth;
} | {
    kind: "pending";
} | {
    kind: "expired";
} | {
    kind: "denied";
};
export declare function tryExchangeDeviceCode(pending: PendingDeviceFlow): Promise<ExchangeResult>;
/** Resolve user auth, initiating or resuming device flow as needed.
 *  Returns either a usable auth or a pending state for the caller to surface. */
export declare function resolveUserAuth(): Promise<AuthState>;