/**
 * TypingIndicator content type for Convos.
 *
 * Matches the iOS TypingIndicatorCodec:
 * - Content type: convos.org/typing_indicator:1.0
 * - Payload: JSON {"isTyping": bool}
 * - shouldPush: false (silent)
 * - fallback: undefined (no text fallback)
 *
 * Typing indicators are ephemeral — they are not stored in the
 * conversation history and are filtered from message streams.
 */
import type { ContentTypeId, EncodedContent } from "@xmtp/node-bindings";
import type { ContentCodec } from "@xmtp/content-type-primitives";
import type { DecodedMessage } from "@xmtp/node-sdk";
export declare const ContentTypeTypingIndicator: ContentTypeId;
export interface TypingIndicatorContent {
    isTyping: boolean;
}
export declare class TypingIndicatorCodec implements ContentCodec<TypingIndicatorContent> {
    get contentType(): ContentTypeId;
    encode(content: TypingIndicatorContent): EncodedContent;
    decode(content: EncodedContent): TypingIndicatorContent;
    fallback(_content: TypingIndicatorContent): string | undefined;
    shouldPush(_content: TypingIndicatorContent): boolean;
}
/**
 * Check if a message is a TypingIndicator content type.
 */
export declare function isTypingIndicatorMessage(message: DecodedMessage): boolean;
/**
 * Extract a TypingIndicatorContent from a DecodedMessage.
 */
export declare function getTypingIndicatorContent(message: DecodedMessage): TypingIndicatorContent | undefined;