import type { FlowRequestAction, DecryptedFlowRequest } from '../crypto/types';
export interface FlowRequest {
    readonly version: string;
    readonly action: FlowRequestAction;
    readonly screen?: string;
    readonly data: Record<string, unknown>;
    readonly flowToken: string;
    readonly flowTokenSignature?: string;
    respond(): FlowResponseBuilder;
}
export declare class FlowResponseBuilder {
    private readonly flowToken;
    private responseData;
    constructor(flowToken: string);
    goToScreen(screenId: string, data?: Record<string, unknown>): this;
    close(params?: Record<string, unknown>): this;
    withError(errorMessage: string): this;
    build(): object;
}
export type FlowRequestHandler = (request: FlowRequest) => FlowResponseBuilder | Promise<FlowResponseBuilder>;
export type FlowErrorHandler = (error: Error, request?: FlowRequest) => void;
export interface FlowEndpointOptions {
    privateKey: string;
    appSecret?: string;
    onRequest: FlowRequestHandler;
    onError?: FlowErrorHandler;
    acknowledgeErrors?: boolean;
}
export declare function createFlowRequest(decrypted: DecryptedFlowRequest): FlowRequest;
export declare const HEALTH_CHECK_RESPONSE: {
    data: {
        status: string;
    };
};
export declare const ERROR_ACK_RESPONSE: {
    data: {
        acknowledged: boolean;
    };
};