/// <reference types="node" />
import * as mongoose from 'mongoose';
import * as Bluebird from 'bluebird';
import * as events from 'events';
export interface IHistory {
    col: string;
    oid: any;
    shardKeyName: string;
    shardKey: any;
    op: 'insert' | 'remove' | 'update';
    query: string;
}
export interface IRollback {
    col: string;
    oid: any;
    shardKeyName: string;
    shardKey: any;
}
export interface ITransaction extends mongoose.Document {
    history: IHistory[];
    rollback: IRollback[];
    state: string;
    id: string;
}
export declare class Transaction extends events.EventEmitter {
    static TRANSACTION_EXPIRE_THRESHOLD: number;
    private static model;
    private static connection;
    static readonly getModel: mongoose.Model<ITransaction>;
    private transaction;
    private participants;
    static initialize(connection: mongoose.Connection): void;
    begin(): Bluebird.Disposer<void | this>;
    static scope<R>(doInTransactionScope: (t: Transaction) => Bluebird<R> | Promise<R>): Bluebird<R> | Promise<R>;
    readonly _id: mongoose.Types.ObjectId;
    cancel(): Promise<void>;
    private static rollback;
    private static commitHistory;
    private static commitHistoryRemove;
    private static commitHistoryUpdate;
    static recommit(transaction: ITransaction): Promise<void>;
    private static validate;
    private static makeHistory;
    commit(): Promise<void>;
    insertDoc(doc: mongoose.Document, retry?: boolean): any;
    removeDoc(doc: mongoose.Document): void;
    findOne<T extends mongoose.Document>(model: mongoose.Model<T>, cond: Object, fields?: Object, options?: Object): Promise<T>;
    private setRollbackHistory;
    private static getShardKey;
}