code: func FromHex(s string) []byte {
  	if len(s) > 1 {
  		if s[0:2] == "0x" || s[0:2] == "0X" {
  			s = s[2:]
  		}
  	}
  	if len(s)%2 == 1 {
  		s = "0" + s
  	}
  	return Hex2Bytes(s)
  }
docs: // FromHex returns the bytes represented by the hexadecimal string s.
  // s may be prefixed with "0x".