Oddbean new post about login | logout How would this work? You create and sign a tx, but don’t broadcast? Would this live in a software wallet or in a hardware signing device?
once you sign a txn it's just a string of hex characters that somehow need to be broadcasted to the bitcoin network. it can be done from everywhere, by anyone. good wallet hardware/software should give you the ability to just get the string of signed txn in hex format https://www.blockchain.com/explorer/assets/btc/broadcast-transaction
Right. But if you are fully pre-signing a tx that spends your entire cold stack… you need to protect that hex so it doesn’t accidentally get broadcast 😂
let's say it's not a good idea to keep it as a text file on your desktop
Yes, but if tx get broadcast in the network, the funds will be sent to a new wallet, just it. The original owner alredy have the keys.