Bitcoin Forum

If I make a 2-of-3 multisig wallet, backup all seeds. Can i restore all wallets from seeds on new devices?
Is this work like in simple not multisig wallet?
thanks

Yes. Multisig wallets are created from normal seeds. Multisig just requires the master public key of n seeds in n-of-m configuration. The seeds are used to sign the transaction that can be generated from it.

The seeds that it is generated from is a normal P2PKH wallet.

It requires n master private keys or seeds not n master public keys. You can't sign transactions with the master public key. At a minimum you will need n seeds (or master private keys) + the master public key of the remaining wallet(s).

Correct. I was referring to the generation of the multisig. During generation, you cannot have everybody's master private, only their master public is enough to generate the multisig. The seeds are needed to sign any transaction that spends an UXTO from it.

Can I confirm: if I create a 2 of 3 multi-sig paper storage wallet, do I need the Master Public Key of all three accounts to access the funds again? Or can I do it with just 2 of the 3 seeds?

I believe you need all 3 master public keys to generate the same set of addresses but you will only need two signatures / private keys in order to access the funds.

For each cosigner you need either the seed or the MPK. So 1 seed + 2MPKs, or 2 seeds +1mpk, 3seeds+0mpks, or 0 seeds +3 mpks. To sign a transaction you will need at least 2 seeds in that wallet or you will need to carry the unsigned tx to a wallet that has the necessary number of seeds. You can't sign with the MPK but you need it to reconstruct the wallet.