> So how would it work with bitcoin in particular? Do all the signers see each address or entire xpub?

An example you could use hot wallet and in a another shard air-grapped signing device using QR Code for pre-signed signature. 

MPC is used in custody solutions instead of self-custody, due high complexity.

Mentioned here: https://thebitcoinmanual.com/articles/multi-party-computation/

Rsync25

So how would it work with bitcoin in particular? Do all the signers see each address or entire xpub?

bitcoin

Exclusive: Inside a Swiss nuclear bunker’s secret Bitcoin vault

Fixed links:

- https://www.coinbase.com/en-br/learn/wallet/what-is-a-multi-party-computation-mpc-wallet

- https://www.fireblocks.com/what-is-mpc/