export type FunnelStepExitReason = 'back' | 'replace' | 'cancel' | 'abandon';
export type FunnelNavigationOutcome = {
    type: 'complete';
    selected?: Record<string, unknown>;
} | {
    type: 'exit';
    reason: FunnelStepExitReason;
};
export type FunnelStepVisit = {
    readonly visitId: number;
    readonly stepId: string;
    readonly startedAt: string;
    readonly outcome: null | 'completed' | 'exited';
};
export type FunnelStepLifecycleIntent = {
    readonly type: 'complete';
    readonly selected?: Readonly<Record<string, unknown>>;
    readonly visit: FunnelStepVisit;
} | {
    readonly type: 'exit';
    readonly reason: FunnelStepExitReason;
    readonly visit: FunnelStepVisit;
};
export type FunnelStepLifecycleStartIntent = {
    readonly type: 'start';
    readonly visit: FunnelStepVisit;
};
declare const funnelStepLifecycleStateBrand: unique symbol;
export type FunnelStepLifecycleState = {
    readonly [funnelStepLifecycleStateBrand]: true;
};
export declare const createFunnelStepLifecycleState: () => FunnelStepLifecycleState;
export declare const startVisit: (state: FunnelStepLifecycleState, input: Pick<FunnelStepVisit, "stepId" | "startedAt">) => FunnelStepLifecycleStartIntent | null;
export declare const finishVisit: (state: FunnelStepLifecycleState, visitId: FunnelStepVisit["visitId"], outcome: FunnelNavigationOutcome) => FunnelStepLifecycleIntent | null;
export {};