text: var request = require('request-promise');
  var common = require('../../common');
  var logger = require('../logger');
  var options = {};
  
  exports.getInvoice = (req, res, next) => {
    options = common.getOptions();
    options.url = common.getSelLNServerUrl() + '/invoice/' + req.params.rHashStr;
    request(options).then((body) => {
      logger.info({fileName: 'Invoice', msg: 'Invoice Info Received: ' + JSON.stringify(body)});
      if(undefined === body || body.error) {
        res.status(500).json({
          message: "Fetching Invoice Info Failed!",
          error: (undefined === body) ? 'Error From Server!' : body.error
        });
      }
      res.status(200).json(body);
    })
    .catch((err) => {
      return res.status(500).json({
        message: "Fetching Invoice Info Failed!",
        error: err.error
      });
    });  
  };
  
  exports.listInvoices = (req, res, next) => {
    options = common.getOptions();
    options.url = common.getSelLNServerUrl() + '/invoices?num_max_invoices=' + req.query.num_max_invoices + '&index_offset=' + req.query.index_offset + 
    '&reversed=' + req.query.reversed;
    request(options).then((body) => {
      const body_str = (undefined === body) ? '' : JSON.stringify(body);
      const search_idx = (undefined === body) ? -1 : body_str.search('Not Found');
      logger.info({fileName: 'Invoice', msg: 'Invoices List Received: ' + body_str});
      if(undefined === body || search_idx > -1 || body.error) {
        res.status(500).json({
          message: "Fetching Invoice Info failed!",
          error: (undefined === body || search_idx > -1) ? 'Error From Server!' : body.error
        });
      } else {
        if (undefined !== body.invoices && body.invoices.length > 0) {
          body.invoices.forEach(invoice => {
            invoice.creation_date_str =  (undefined === invoice.creation_date) ? '' : common.convertTimestampToDate(invoice.creation_date);
            invoice.settle_date_str =  (undefined === invoice.settle_date) ? '' : common.convertTimestampToDate(invoice.settle_date);
            invoice.btc_value = (undefined === invoice.value) ? 0 : common.convertToBTC(invoice.value);
            invoice.btc_amt_paid_sat =  (undefined === invoice.amt_paid_sat) ? 0 : common.convertToBTC(invoice.amt_paid_sat);
          });
          body.invoices = common.sortDescByKey(body.invoices, 'creation_date');
        }
        logger.info({fileName: 'Invoice', msg: 'Invoices List Received: ' + JSON.stringify(body)});
        res.status(200).json(body);
      }
    })
    .catch(function (err) {
      return res.status(500).json({
        message: "Fetching Invoice Info failed!",
        error: err.error
      });
    });
  };
  
  exports.addInvoice = (req, res, next) => {
    options = common.getOptions();
    options.url = common.getSelLNServerUrl() + '/invoices';
    options.form = JSON.stringify({ 
      memo: req.body.memo,
      value: req.body.amount,
      private: req.body.private,
      expiry: req.body.expiry
    });
    request.post(options).then((body) => {
      logger.info({fileName: 'Invoice', msg: 'Add Invoice Responce: ' + JSON.stringify(body)});
      if(undefined === body || body.error) {
        res.status(500).json({
          message: "Add Invoice Failed!",
          error: (undefined === body) ? 'Error From Server!' : body.error
        });
      } else {
        res.status(201).json(body);
      }
    })
    .catch(function (err) {
      return res.status(500).json({
        message: "Add Invoice Failed!",
        error: err.error
      });
    });
  };
  