code: func Armor62Seal(plaintext []byte, typ MessageType, brand string) (string, error) {
  	hdr := makeFrame(headerMarker, typ, brand)
  	ftr := makeFrame(footerMarker, typ, brand)
  	return armorSeal(plaintext, hdr, ftr, Armor62Params)
  }
docs: // Armor62Seal takes an input plaintext and returns and output armor encoding
  // as a string, or an error if a problem was encountered. Also provide a header
  // and a footer to frame the message. Uses Base62 encoding scheme