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Version 4.1.2 Released (More QR Codes)
substack.coinkite.com

Version 4.1.2 Released (More QR Codes)

Coinkite
Jul 28, 2021
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Version 4.1.2 Released (More QR Codes)
substack.coinkite.com

Enhancements

  • Shows QR code with BIP-85 derived entropy value if you press (3) while value shown on-screen. Thanks to @opennoms for idea. Works with 12/18/24-words, XPRV, privatekey and even hex cases.

  • Offer to show QR in other places:

    • Coldcard’s main XPUB, in Advanced > View Identity

    • Seed words, during picking process (before the quiz)

    • Stored seed words: Advanced > Danger Zone > Seed Functions > View Seed Words

    • TXID of just-signed transaction (64 hex digits)

    • Encryption password for the system backup file (12 words)

  • We now grind a nonce so that our signatures are always 71 bytes or shorter. This may save a byte in transaction size, and makes our signatures identical to those produced by Bitcoin Core, improving anonymity on-chain. Thanks to @craigraw for detecting this.

Bug Fixes

  • On a blank Coldcard, after importing a seed phrase using the Seed XOR feature, the main menu was not updated to show system is “Ready To Sign”.

  • Red caution light could happen (a false positive) if a specific sequence of firmware upgrades and reboots occured in the right order. Issue could only occur once during lifetime of any particular Coldcard.

Download the latest firmware


Get COLDCARD Mark 3

Video Tutorials

We have a growing library of video tutorials on Youtube … and we’re still adding more!

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Version 4.1.2 Released (More QR Codes)
substack.coinkite.com
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