New COLDCARD EDGE Version Released
New COLDCARD EDGE Release: Versions 6.3.5X (Mk4) and 6.3.5QX (Q).
Catch-Up Release
This release is meant to catch-up Edge with the recent main release which included many useful bugfixes and improvements. Read about it in our most recent Feb 13/25 post.
One important non-code change is we’ve reconsidered the startup warning we used to show, and it now reads:
This firmware version is qualified for use with wallets (such as AnchorWatch) that keep redundant key schemas for recovery independent of COLDCARD. We support the very latest Bitcoin innovations in the Edge Version.
This means we think this “The Edge” is a little less sharp now, but please still keep backups and use key schemes which allow full recovery for single failed signer. Multisig with 2-of-2 or 57-of-57 keys are still bad ideas!
Learn more about Miniscript and/or Taproot support in these wallets which support COLDCARD:
We offer no third-party software warranties, please do your own research.
What is EDGE?
Branch new_edge is our
long-lived branch that contains features that may not be ready for prime time,
such as Taproot and Tapscript, BSMS and Miniscript.
Our standards for releasing new Edge versions are lower, so we can iterate faster and get these advancements out to other developers as soon as possible.
Edge releases typically contain all the latest Mk4/Q features from our most recent mainstream firmware.
Shared Changes - Both Mk4 and Q
- Allow origin-less extended keys in multisig & miniscript descriptors
- Static internal keys disallowed - all keys need to be ranged extended keys
Video Tutorials
We have a growing library of video tutorials on Youtube … and we’re still adding more!