import type { Patch } from '../../json-crdt-patch';
import type { Model } from '../model';
/**
 * Terminology:
 *
 * - `remote`: the state of the document that is known to the remote server/peers.
 * - `base`: the next state of the document which is in the process of being saved to the remote server.
 * - `head`: the current state of the document which is being edited by the user.
 * - `tip`: the future state of the document, ahead of `head`, could be due to undo/redo.
 *
 * The `log` starts at `remote` and ends at `tip`, the `base` and `head` pointers
 * are in the middle of the `log`.
 */
export interface DraftOptions {
    base: Model;
    head: Patch[];
    tip: Patch[];
}
export declare class Draft {
    base: Model;
    head: Model;
    tip: Patch[];
    constructor(opts: DraftOptions);
    /**
     *
     * @param patches
     */
    rebase(patches: Patch[]): void;
    advance(index: number): void;
    undo(): void;
    redo(): void;
}