You have to use an SD card to use a cold card.
Discussion
Ohh. Expecting one in the mail soon, but didn't order anything other than the mk4. No cards or cords. I guess this won't do anything.
Wait a sec, no cards in this tutorial tho
It also works over usb. SD card is better security though.
My mistake! Sorry about that.
Coldcard also only works with the PSBT standard. How you use a Ledger depends on how your wallet has implemented the Ledger integration, or if you are using Ledger’s native wallet software. Greater opportunity for things to go wrong with a Ledger since it’s supporting more formats than just the PSBT standard.
The market will sort it out. 🤷🏼♂️
QR is even better security - akin to using a new SD card for every transaction.
If you can use qr code on coldcard mk4 why even own 9volt battery, SD card etc?
No you can't,
SeedSigner & Foundation you can.
Is this not the cold card doing QR code?
This is from one year ago, so the UX has improved 100x but this is what I'm talking about.
Thanks, I don't know if my link went through earlier. I think this is the coldcard also doing that?
The SD card enables airgapped usage where you create the transaction in your read only wallet and then sign it on your Coldcard via SD so your private keys never touch anything that accesses the internet. Higher security level