MTProto string type: are lengths measured in bytes or UTF-8 string length?

Question

Looking at https://core.telegram.org/type/string it's unclear to me whether the length discussed here is the UTF-8 string length, or the number of bytes the string has been encoded into.

score 0 · Accepted Answer · answered Mar 14 '20 at 17:14

0

On second reading it seems that it is the number of bytes:

then L bytes of the string followed by 0 to 3 characters containing 0

answered Mar 14 '20 at 17:14

0x777C

993
7
21

MTProto string type: are lengths measured in bytes or UTF-8 string length?

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