Is it possible to reconstitute an established wallet with a new signing device while also adding a passphrase to that new wallet? Thereby adding a passphrase to an already created seed phrase. Thanks.
I take "
signing device" as hardware wallet and "
established wallet" as the wallet within a client connected to your hardware wallet, no?
Most wallets don't do that since the "
Master Private Key" of the signing device with a passphrase will be different than the one without a passphrase.
Some hardware wallets use that as feature (IIRC, "
hidden wallet" or something) but it's still not combined with any instance of the same wallet that has a no passphrase or different passphrase.
But it's theoretically doable if the client and hardware wallet can support multiple master keys.
Please tell the hardware wallet's model and the client (
wallet) where you connected it if you want to get more accurate answers.