import { InitConfig, Environment, FlowEventType, FlowEventCallback, InitFlowInstance } from '../types.js';
/**
 * Standalone InitFlow class for handling initialization with callbacks
 */
export declare class InitFlow implements InitFlowInstance {
    private iframe;
    private container;
    private eventListeners;
    private keepAliveInterval;
    private messageHandler;
    private authorizationCode;
    private config;
    private partnerName;
    private environment;
    private branchOverride?;
    constructor(config: InitConfig, partnerName: string, environment: Environment, branchOverride?: string);
    /**
     * Initialize the init flow by creating and injecting a hidden iframe
     */
    initialize(): Promise<void>;
    /**
     * Construct the specific flow URL for initialization
     */
    private constructFlowUrl;
    /**
     * Create flow URL using partner name and environment
     */
    private createFlowUrl;
    /**
     * Setup event listeners to only handle authentication events
     */
    private setupEventListeners;
    /**
     * Emit events to registered listeners
     */
    private emit;
    /**
     * Register an event listener
     */
    on(event: 'authenticationSucceeded' | 'authenticationFailed', callback: FlowEventCallback): void;
    /**
     * Remove an event listener
     */
    off(event: FlowEventType, callback: FlowEventCallback): void;
    /**
     * Close the flow and clean up resources
     */
    close(): void;
    setupKeepAlive(): void;
}