import type { MessageOriginUser, MessageOriginHiddenUser, MessageOriginChat, MessageOriginChannel } from 'telegraf/types';
export type ForwardOrigin = MessageOriginUser | MessageOriginHiddenUser | MessageOriginChat | MessageOriginChannel;
export interface LegacyForwardFields {
    forward_from?: {
        first_name?: string;
        last_name?: string;
        username?: string;
    };
    forward_from_chat?: {
        title?: string;
        username?: string;
    };
    forward_sender_name?: string;
}
export interface ForwardMetadata {
    forward_origin?: ForwardOrigin;
    forward_from?: LegacyForwardFields['forward_from'];
    forward_from_chat?: LegacyForwardFields['forward_from_chat'];
    forward_sender_name?: string;
}
export declare function forwardProvenancePrefix(meta: ForwardMetadata): string;