Bitcoin staking protocol support multi-signature addresses?

[tpkeeper]

Does babylon's bitcoin staking protocol support multi-signature addresses? I have a multi-signature btc address, how can I participate in btc staking on babylon?

[usmanshahid86]

@vitsalis I would also like to create the BTC stacking transaction such that the funds are locked in a multi-signature setup rather than the single Staker key. How may I do this?

[KonradStaniec]

At this point in time Babylon requires that you have single Staker public key which you put into appropriate scripts. Given that you have 2 options:

• if you are interested in m-of-m multisig you can use musig2 protocol - https://eprint.iacr.org/2020/1261.pdf to aggregate several keys into one public key. Good implementation is https://github.com/lightningnetwork/lnd/blob/84c91f701cab21c70c5f4292b82a8bcce9a79e63/input/musig2.go
• if you are interested in n-of-m multisig, you can use FROST protocol - https://eprint.iacr.org/2020/852.pdf. First you generate shared key which is put into scripts and then proceed from here.