interface MessageOriginChatimport { type MessageOriginChat } from "https://dotland.deno.dev/x/grammy@v1.27.0/types.web.ts"; The message was originally sent on behalf of a chat to a group chat. Propertiestype: "chat"Type of the message origin, always “chat” date: numberDate the message was sent originally in Unix time sender_chat: ChatChat that sent the message originally optionalauthor_signature: stringFor messages originally sent by an anonymous chat administrator, original message author signature