--- Log opened Tue Mar 09 00:00:51 2021
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12:08 < luke-jr> what is gained by not using a hash of the "key" in the spk?
12:10 < belcher> pubkeys are visible so you can do ring signatures
12:10 < belcher> thats a possible way of proving that a LN channel exists with greater privacy
12:11 < belcher> prove that an LN channel exists without revealing the exact UTXO of it
12:12 < belcher> also, as the public key is visible it can be tweaked to obtain another keypair for which the private key is also known... this is used by snicker coinjoin
12:13 < belcher> (iv maybe tunnel-visioned on privacy, perhaps theres other improvements like greater efficiency because a hash function is avoided)
12:15 < luke-jr> :o
12:17 < luke-jr> belcher: couldn't you just include the pubkeys with the ring signature or such?
12:17 < belcher> pubkeyhash hides the pubkeys from random people out there who would construct the ring signature
12:18 < belcher> someone creating a ring signature can do it without needing to interact with the owner of the pubkey at all, as long as they know the pubkey
12:18 < luke-jr> oh right
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15:40 < ghost43> it also saves a tiny bit of space as instead of storing both the hash and the pubkey in the chain, only the pubkey is stored
15:42 < ghost43> https://github.com/bitcoin/bips/blob/master/bip-0341.mediawiki#cite_note-2
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--- Log closed Wed Mar 10 00:00:53 2021