Noun
bytestring (plural bytestrings)
(programming) A text string treated as a series of single bytes rather than a series of characters of possibly varying storage size.
Note that you could choose // expiration durations dynamically, depending on, e.g. the path or a query // `mac` is an ArrayBuffer, so we need to jump through a couple hoops to get // it into a ByteString, then a Base64-encoded string. Source: Internet