Change Log

This lists the changes in the most recent firmware, for each hardware platform.

Shared Improvements - Both Mk and Q

New Feature: Sign BIP-322 Proof of Reserve PSBT files.
- Requires a carefully crafted PSBT that does not represent a monetary transaction, but instead is demonstrating control over the keys for a list of UTXO, and commits to a short text message.
- Read more here.
New Feature: WIF Store. Ability to import foreign WIF keys (Wallet Import Format) and use them for PSBT signing.
New Feature: Export BIP-380 extended key expression. Navigate to "Advanced/Tools -> Export Wallet -> Key Expression"
New Feature: Transaction Input Explorer. Shows data about UTXO(s) being spent. Press (2) before approving transaction to enter Transaction Explorer.
New Feature: Support for v3 transactions in PSBT files.
New Feature: Option to type a derived BIP-85 secret as an emulated USB keyboard.
New Feature: Nuke Device: purges all sensitive data and makes your COLDCARD e-waste.
Enhancement: CCC debug menu allows you to reset block height.
Enhancement: Show the BIP-39 passphrase on-screen (must scroll down) once new key is in effect.
Enhancement: New "Buried Settings" menu, inside Settings menu, for rarely-applied settings.
Enhancement: Add "Blue Wallet" option to "Export Wallet"
Enhancement: Detect duplicated inputs in PSBT file.
Bugfix: Replace / with - in exported file names of multisig wallet export artifacts.