import { type SyncMessage, type SyncState } from './types.js';
import { type Action, type Graph } from 'graph/index.js';
/**
 * Generates a new sync message for a peer based on our current graph and our sync state with them.
 *
 * @returns A tuple `[state, message]` containing our updated sync state with this peer, and the
 * message to send them. If the message returned is `undefined`, we are already synced up, they know
 * we're synced up, and we don't have any further information to send.  */
export declare const generateMessage: <A extends Action, C>(graph: Graph<A, C>, prevState: SyncState) => [SyncState, SyncMessage | undefined];
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