export declare const toTimestamp: (value: unknown, fallback?: number) => number;
export interface ChatThreadRef {
    chatId: string | null;
    threadId: string | null;
}
export interface ChatTargetRef {
    chatId: string | null;
    threadId: string | null;
    messageId: string | null;
}
export declare function extractChatIdFromChatRef(chatRef: string | null | undefined): string | null;
export declare function buildChatTargetRef(chatIdOrRef: string): string;
export declare function extractThreadIdFromThreadRef(threadRef: string | null | undefined): string | null;
export declare function extractChatThreadRef(uri: string | null | undefined): ChatThreadRef;
export declare function extractChatTargetRef(uri: string | null | undefined): ChatTargetRef;
export declare function resolveThreadChatId(thread: Pick<Record<string, unknown>, 'parent'> | null | undefined): string | null;