/**
 * OAuth 2.0 Device Authorization Grant (Device Flow)
 * RFC 8628: https://tools.ietf.org/html/rfc8628
 *
 * Used for CLI and non-browser environments where user authenticates
 * on a separate device (phone, browser on another machine, etc.)
 */
export interface DeviceAuthResponse {
    device_code: string;
    user_code: string;
    verification_uri: string;
    verification_uri_complete?: string;
    expires_in: number;
    interval: number;
}
export interface TokenResponse {
    access_token: string;
    refresh_token?: string;
    expires_in: number;
    token_type: string;
    scope?: string;
}
export interface OAuthConfig {
    clientId: string;
    clientSecret?: string;
    deviceAuthUrl: string;
    tokenUrl: string;
    scopes?: string[];
}
export declare class DeviceFlowAuthenticator {
    private config;
    private stdin;
    constructor(config: OAuthConfig, stdin?: NodeJS.ReadStream);
    /**
     * Complete OAuth Device Flow authentication
     */
    authenticate(): Promise<TokenResponse>;
    /**
     * Step 1: Request device and user codes from authorization server
     */
    private requestDeviceCode;
    /**
     * Step 2: Display instructions to user
     */
    private displayUserInstructions;
    /**
     * Step 3: Poll token endpoint until user authorizes
     */
    private pollForToken;
    private sleep;
}
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