code: function toBuffer(value, encoding) {
  
      if( typeof value === 'string') {
  
          encoding = encoding || 'hex';
          
          if( !re.test(encoding) ) {
              throw new Error('[toBuffer] bad encoding. Must be: utf8|ascii|binary|hex|utf16le|ucs2|base64');
          }
          
          try {
              return Buffer.from(value, encoding);
          }
          catch (e) {
              throw new Error('[toBuffer] string value could not be converted to a buffer :' + e.message);
          }
  
      }
      else if( typeof value === 'object' ) {
          if( Buffer.isBuffer(value) ) {
              return value;
          }
          else if( value instanceof Array ) {
              try {
                  return Buffer.from(value);
              }
              catch (e) {
                  throw new Error('[toBuffer] Array could not be converted to a buffer :' + e.message);
              }
          }
      }
      throw new Error('[toBuffer] unsupported type in value. Use Buffer, string or Array');
  }
docs: Convert value into a buffer
  
  @param {String|Buffer|Array} value  a buffer, and array of bytes or a string that you want to convert to a buffer
  @param {String} [encoding]          encoding to use in conversion if value is a string. Defaults to 'hex'
  @returns {*}