import { Client } from 'pg';

declare enum TransactionStatus {
    ACTIVE = 0,
    COMMITTED = 1,
    CANCELLED = 2
}
declare class TransactionContext {
    private client;
    private parentTransaction?;
    private activeSavePoint?;
    protected status: TransactionStatus;
    constructor(client: Client, parentTransaction?: TransactionContext | undefined, activeSavePoint?: string | undefined);
    transaction(childTransaction?: (client: PgtxClient) => Promise<void>): Promise<PgtxClient>;
    commit(): Promise<PgtxClient>;
    rollback(): Promise<PgtxClient>;
}

type PgtxClient = Client & TransactionContext;

declare function pgtx(client: Client): PgtxClient;

export { type PgtxClient, pgtx as default };