# COLDCARD Mk4 Firmware v5.1.2 release
- Support all SIGHASH types (previously only SIGHASH_ALL was supported). This can enable specialized Bitcoin transactions involving multiple signers and even limited changes to the transaction after signing. To enable the most dangerous SIGHASH modes, you must change Advanced -> Danger Zone -> Sighash Checks. Warnings are shown for all of the new SIGHASH modes regardless of this setting.
- SeedXOR now supports 12 and 18 words mnemonics.
- Signing memory, speed optimizations.
- Docker repro build container improvements (non-privileged container)
- Bugfix: After extended private key and TAPSIGNER backup import into blank wallet, users needed to manually reboot Coldcard.
- Bugfix: Do not set SIGHASH type on foreign PSBT inputs
- Bugfix: "Validating..." screen would be shown twice in some cases. Improves signing performance.
Download here https://coldcard.com/docs/upgrade
12 WORD SEEDXOR
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#[0]
“You don’t want to get left behind.”
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I wanna show Brian from Coinbase that Africa needs Bitcoin and Lightning… NOT crypto 🤦♂️
https://twitter.com/JoeNakamoto/status/1644266285969096704?s=20
Brian knows he can’t control #Bitcoin
Brian doesn’t suffer from negligence, he suffers from malice
Not without an exchange service. Any sale of coin held over a year is tax exempt, though. 🤘🏼
Madeira is where you want to be. Hurry though, many people from all over the world are heading there. #Bitcoin already has strong roots taking shape there.
🤷🏻♂️
Y’all know better than me. I’m just spitballing
It’s spotty.
When I first open Damus after not using it for a few, it shows I’m connected to 0 relays. Might be why we don’t get notifications? I’m just guessing.
Let’s smash buy and send this world into shock
GM #Plebchain
Building a #[1] will make your keys so happy they’ll want to sing!
#[2]
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