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Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. It is specified in RFC 4648.
A 64-character string specifying the URI- and filename-safe Base64 alphabet.
decode s
decodes the string s
that is encoded in base64 format. Will leave trailing NULLs on the string, padding it out to a multiple of 3 characters.