export type FunnelUserTouch = Record<string, string>;
export type FunnelUserAttribution = {
    firstTouch: FunnelUserTouch;
    lastTouch: FunnelUserTouch;
    lastNonOrganicTouch?: FunnelUserTouch;
    context: Record<string, unknown>;
};
export declare const collectCurrentFunnelAttribution: (input?: {
    href?: string | null;
    referrer?: string | null;
    userAgent?: string | null;
    language?: string | null;
    platform?: string | null;
    vendor?: string | null;
    timeZone?: string | null;
    posthogProperties?: Record<string, unknown> | null;
}) => FunnelUserAttribution;
export declare const mergeFunnelUserAttribution: (current: unknown, incoming: FunnelUserAttribution | null | undefined) => FunnelUserAttribution;
export declare const buildFunnelAttributionEventMetadata: (attribution: FunnelUserAttribution | null | undefined) => Record<string, string>;
export declare const getFunnelUserAttribution: (document: unknown) => FunnelUserAttribution | null;