I was on bitcoiner.guide (great website)
I was looking in the multi-sig section and this is one of the bullet points:
"Multisig addresses stand out to chain surveillance firms looking at the blockchain. This will be not be the case when Taproot is implemented and widely adopted"
So when will taproot multisig or is it already being used somewhere?
Good question...
As I understand taproot wallets produce addresses with a longer string (start with a bc1p)
Still I'm not sure whether multisig segwit wallets start with a bc1q. If they do, then they will also stand out to surveillance.
You can do scripted multisig with P2WSH which has addresses that start with bc1q. Scripted multisig makes use of
OP_CHECKMULTISIGand lists all public keys and signatures separately. With MuSig2 you would be using P2TR addresses that have the same length as P2WSH and start with bc1p. MuSig uses scriptless multisignatures. All the public keys are aggregated into one and you will only see a single aggregated signature in the corresponding input. As such they are indistinguishable from single-sig uses of P2TR. P2TR outputs can also have additional spending conditions defined in their script tree which can contain scripted multisig constructions. Those would then make use ofOP_CHECKSIGADDinstead ofOP_CHECKMULTISIG.Our topic page on scriptless multisignatures goes into a bit more details and links related news mentions: https://bitcoinops.org/en/topics/multisignature/
It’s already live. The spec for MuSig2 (BIP327) was finalized in October and there are multiple wallets that support multi-party transactions on basis of MuSig2.
Which ones
Mh, I must admit that list was harder to fill than I thought when I wrote above comment. Afaik, Muun, LND, Munstr, and BitGo use MuSig in production although some of them are still experimental. At least Nunchuk, Bitkey, and Liana are working on MuSig support, I would imagine a number of other hardware and software wallets are also at least looking at it.
I want to know aswell. Can some1 reply to my comment?
I will be a happy man when I'm finally able to create cold multisig Taproot wallets in Sparrow. Possibly!