text: const slpMiddleware = (req, res, next) => {
      if (!req.is('application/simpleledger-payment')) return next();
      let data = [];
      req.on('data', chunk => {
          data.push(chunk);
      });
      req.on('end', () => {
          if (data.length <= 0) return next();
          data = Buffer.concat(data);
          req.raw = data;
          next();
      });
  };
  
  module.exports = slpMiddleware;
  