Replying to Avatar ᴛʜᴇ ᴅᴇᴀᴛʜ ᴏꜰ ᴍʟᴇᴋᴜ

spoiler alert: it doesn't check

i just never encountered this before, because it looks like most generators check for a 2 key and either invert it or reject it

it's not specified in either nip-04 or bip-340 except obliquely and not explicitly

you can't get around it, claude is wrong, the ECDH computation makes two different keys depending on whether it's an odd or even Y
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Mike Dilger ☑️ 1y ago

BIP-340 specifies choosing the 02. Look at the section "Implicit Y coordinates"

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ᴛʜᴇ ᴅᴇᴀᴛʜ ᴏꜰ ᴍʟᴇᴋᴜ 1y ago

so using code that doesn't check for it is wrong

go read some source code of nostr libraries again with regard to key generation

i'm not gonna pretend i checked the javascript or rust libraries, as i hate both of these languages but the Go libraries DO NOT CHECK

just write a short piece of code generating new keys and then use two of them to make an ECDH key both ways

then you'll know if the library is doing it right