/**
 * Device Handler
 *
 * SDK-internal handler for device_challenge and setup_device steps.
 *
 * - setup_device: Enrollment flow - generate keypair, send keyset, get challenge
 * - device_challenge: Verification flow - sign challenge with existing key
 *
 * Both steps are SDK-internal and never exposed to users.
 */
import { type DeviceChallengeStep, type ErrorStep, type RequestChallengeAction, type SetupDeviceStep, type SubmitSignatureAction } from "../protocol";
export interface DeviceHandlerConfig {
    /** Project ID for key scoping */
    configId: string;
    /** User identifier for key lookup */
    userIdentifier: string;
}
export interface SignatureResult {
    success: true;
    action: SubmitSignatureAction;
}
export interface SignatureError {
    success: false;
    error: ErrorStep;
}
export type DeviceHandlerResult = SignatureResult | SignatureError;
export interface SetupResult {
    success: true;
    action: RequestChallengeAction;
}
export interface SetupError {
    success: false;
    error: ErrorStep;
}
export type DeviceSetupResult = SetupResult | SetupError;
/**
 * Handle a device_challenge prompt by signing the challenge.
 *
 * @param challenge - The device challenge prompt from the server
 * @param config - Handler configuration
 * @returns Either a submit_signature action or an error prompt
 */
export declare function handleDeviceChallenge(challenge: DeviceChallengeStep, config: DeviceHandlerConfig): Promise<DeviceHandlerResult>;
/**
 * Check if the SDK can handle a device challenge for the given user.
 */
export declare function canHandleDeviceChallenge(configId: string, userIdentifier: string, _keyId: string): Promise<boolean>;
/**
 * Handle a setup_device prompt by generating ZKP materials and returning
 * a request_challenge action.
 *
 * This is the enrollment flow - generates a new keypair and sends the keyset
 * to the server to get a challenge to sign.
 *
 * @param setup - The setup_device prompt from the server
 * @param config - Handler configuration
 * @returns Either a request_challenge action or an error prompt
 */
export declare function handleSetupDevice(setup: SetupDeviceStep, config: DeviceHandlerConfig): Promise<DeviceSetupResult>;