export type SyncedStateValue = unknown;
export declare const PROTOCOL_VERSION = 1;
export type SyncedStateEnvelope = {
    v: typeof PROTOCOL_VERSION;
} & SyncedStateMessage;
export type SyncedStateMessage = ClientMessage | ServerMessage;
export type ClientMessage = {
    kind: "getState";
    key: string;
    id: string;
} | {
    kind: "setState";
    key: string;
    value: SyncedStateValue;
    id: string;
} | {
    kind: "subscribe";
    key: string;
    id: string;
} | {
    kind: "unsubscribe";
    key: string;
    id: string;
};
export type ServerMessage = {
    kind: "getState";
    key: string;
    value?: SyncedStateValue | undefined;
    id: string;
} | {
    kind: "setState";
    key: string;
    id: string;
} | {
    kind: "subscribe";
    key: string;
    id: string;
} | {
    kind: "unsubscribe";
    key: string;
    id: string;
} | {
    kind: "update";
    key: string;
    value?: SyncedStateValue;
} | {
    kind: "error";
    message: string;
    id?: string;
};
export declare function packMessage(message: SyncedStateMessage): string;
export declare function unpackClientMessage(data: string): ClientMessage;
export declare function unpackServerMessage(data: string): ServerMessage;