--- Log opened Mon Oct 15 00:00:37 2018
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12:48 < ddustin_> Does secp256k1_ecdsa_signature_serialize_der return a signature of always the same length or can it vary?
12:50 < andytoshi> serialize_der can vary
12:50 < andytoshi> serialize_compact is always 64 bytes but it's not really a standard format (though it is a straightforward one)
12:53 < ddustin_> You need a non-compacted signature to sign bitcoin transactions right?
12:54 < ddustin_> Or can you uncompact a signature to post it in a transaction
12:54 < andytoshi> you can un-compact it to put it in a transaction
12:55 < andytoshi> with parse_compact followed by serialize_der
12:55 < sipa> DER and compact are just serializations
12:55 < andytoshi> this is very fast, no EC operations or even field arithmetic
12:55 < sipa> they can contain the same data
12:55 < ddustin_> Oh thats nice. Why does bitcoin use DER encoding then and waste block space?
12:56 < andytoshi> we do this in liquid actually, internally we use compact signatures everywhere because they're easier to handle, being fixed-width and all, and der-ize them for the blockchain
12:56 < sipa> because that's what came out of OpenSSL, and satoshi presumably didn't know anything about the interns
12:56 < sipa> *internals
12:56 < ddustin_> Aah it's legacy. I see
12:57 < ddustin_> Are there any plans to switch bitcoin over to compressed signatures?
12:57 < andytoshi> any schnorr proposal will use compact (schnorr) signatures
12:58 < ddustin_> Ah cool! So many cool things happening lately
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--- Log closed Tue Oct 16 00:00:38 2018