>It was a great little RMDBS.

Why "was"? Nowadays it's not?

>- utf8 library accepts codepoints up to 2^31

Interesting. Didn't Unicode restrict UTF-8 to allow encoding only 21 bits? Does it mean that it can now do 6 byte UTF-8 encodings? What kind of restrictions did it have before?

Comparing the documentation seems to verify this easily:

- https://www.lua.org/manual/5.3/manual.html#6.5

- https://www.lua.org/work/doc/manual.html#6.5

I don't see how this is a good change, it's like, back to 1994 utf-8

Offtopic nitpick:

>Addresses are encoded in Base32 which means there are 32 characters available. So there are 32^16=1.208925819614629174706176×10^24 addresses available.

I sorta understand what you mean, technically it's 32 characters per position (5 bits), and 16 positions. In v2 .onion addresses, that is.

v3 ones [1] are 56 positions, but not all the bits are used for addressing, so the same formula wouldn't quite work to calculate real theoretical capacity. IIRC someone already made site which generates unlimited links to v3 addresses (without having them lead to anywhere, of course).

[1] https://trac.torproject.org/projects/tor/wiki/doc/NextGenOni...

> IIRC someone already made site which generates unlimited links to v3 addresses (without having them lead to anywhere, of course)

V3 addresses are just ed25519 pub keys and a couple byte changes. You can use Go libraries like Bine [0] to generate as many V3 (or V2) addresses as you want from keys.

0 - https://godoc.org/github.com/cretz/bine/torutil#OnionService...