/**
 * @module
 *
 * A basic helper for CRDT delta-synchronization between two peers. In this process
 * Peer 1 initiates the synchronization, then Peer 2 replies, and finally Peer 1
 * finishes with a final message: 3 messages in total.
 *
 * - Message 1: Peer 1 initiates request, sends its *causal context* (version vector).
 * - Message 2: Peer 2 replies with a delta, which also contains Peer 2's causal context.
 * - Message 3: Peer 1 applies the delta, computes a delta to send back to Peer 2, and sends it.
 *
 * After this process, both peers should have the same state, and their clocks should
 * cover each other.
 *
 * ## Example
 *
 * The first code block below shows the flow on Peer 1, the one who initiates
 * the synchronization.
 *
 * ```ts
 * const message2 = await peer1Initiate(model, async (message1) => {
 *   // send message1 to peer 2 and wait for reply (message2)
 * });
 *
 * await peer1Finalize(model, message2, async (message3) => {
 *   // send message3 to peer 2
 * });
 * ```
 *
 * Now, peer 2, who participates in the synchronization:
 *
 * ```ts
 * const message3 = await peer2Reply(model, message1, async (message2) => {
 *   // send message2 to peer 1 and wait for reply (message3)
 * });
 *
 * peer2Finalize(model, message3);
 * ```
 */
import type { Model } from '../model';
/**
 * Initiates the synchronization process by sending Peer 1's causal context: Message 1.
 * @param peer1Model Model of Peer 1.
 * @param send Function that sends the message over the network.
 */
export declare const peer1Initiate: (peer1Model: Model<any>, send: (message1: Uint8Array) => Promise<Uint8Array>) => Promise<Uint8Array>;
export declare const peer2Reply: (peer2Model: Model<any>, message1: Uint8Array, send: (message2: Uint8Array) => Promise<Uint8Array>) => Promise<Uint8Array>;
export declare const peer1Finalize: (peer1Model: Model<any>, message2: Uint8Array, send: (message3: Uint8Array) => Promise<void>) => Promise<void>;
export declare const peer2Finalize: (peer2Model: Model<any>, message3: Uint8Array) => void;
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