import { BIP32Interface } from 'bitcoinjs-lib';
export declare class Order {
    private tx;
    constructor(bid_utxo_txid: string, bid_utxo_index: number, receive_address: string, ask_asset: string, ask_quantity: number);
    approve(node: BIP32Interface, bid_prev_out_script: string, sighash?: number): this;
    toString(): string;
}