code: function Balance(wid, id, account) {
    if (!(this instanceof Balance))
      return new Balance(wid, id, account);
  
    this.wid = wid;
    this.id = id;
    this.account = account;
    this.unconfirmed = 0;
    this.confirmed = 0;
  }
docs: Balance
  @alias module:wallet.Balance
  @constructor
  @param {WalletID} wid
  @param {String} id
  @param {Number} account