import type { JSONRPCMessage } from '@modelcontextprotocol/sdk/types.js';
import type { EventId, EventStore, StreamId } from '@modelcontextprotocol/sdk/server/streamableHttp.js';
export declare class InMemoryEventStore implements EventStore {
    private streams;
    private index;
    storeEvent(streamId: StreamId, message: JSONRPCMessage): Promise<EventId>;
    replayEventsAfter(lastEventId: EventId, { send }: {
        send: (eventId: EventId, message: JSONRPCMessage) => Promise<void>;
    }): Promise<StreamId>;
}