/** The message was originally a post in a channel */
export declare class MessageForwardOriginChannelBaseModel {
    _: 'messageForwardOriginChannel';
    /** Identifier of the chat from which the message was originally forwarded */
    chatId: number;
    /** Message identifier of the original message; 0 if unknown */
    messageId: number;
    /** Original post author signature */
    authorSignature: string;
}