-local to_hex;
-do
- local function replace_byte_with_hex(byte)
- return ("%02x"):format(byte:byte());
- end
- function to_hex(binary_string)
- return binary_string:gsub(".", replace_byte_with_hex);
- end
-end
-
-local from_hex;
-do
- local function replace_hex_with_byte(hex)
- return string.char(tonumber(hex, 16));
- end
- function from_hex(hex_string)
- return hex_string:gsub("..", replace_hex_with_byte);
- end
-end