import { MESSAGE_TYPES, PROTOCOL_VERSION } from "./constants";
import type { SharedEntry, SharedEntryMeta } from "../types";
export type MessageType = (typeof MESSAGE_TYPES)[keyof typeof MESSAGE_TYPES];
interface BaseMessage {
    protocolVersion: typeof PROTOCOL_VERSION;
    type: MessageType;
    key: string;
    tabId: string;
}
/**
 * Message sent by a tab that needs the latest value for a key.
 */
export interface RequestMessage extends BaseMessage {
    type: typeof MESSAGE_TYPES.REQUEST;
}
/**
 * Message sent in response to a REQUEST.
 */
export interface SnapshotMessage<T = unknown> extends BaseMessage {
    type: typeof MESSAGE_TYPES.SNAPSHOT;
    entry: SharedEntry<T>;
}
/**
 * Message sent after a local state update.
 */
export interface UpdateMessage<T = unknown> extends BaseMessage {
    type: typeof MESSAGE_TYPES.UPDATE;
    entry: SharedEntry<T>;
}
/**
 * Message sent when a key is deleted.
 */
export interface DeleteMessage extends BaseMessage {
    type: typeof MESSAGE_TYPES.DELETE;
    meta: SharedEntryMeta;
}
export type SharedMessage<T = unknown> = RequestMessage | SnapshotMessage<T> | UpdateMessage<T> | DeleteMessage;
export {};