pythcoiner

[WIP] Encrypted backup

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- [x] Installer: import encrypted descriptor - [x] Installer: export encrypted descriptor - [x] Installer: import encrypted backup - [x] Settings: export encrypted descriptor - [x] Settings: export encrypted backup...

"Take a picture" option for adding a note to a label

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**Is your feature request related to a problem? Please describe.** (I'm lazy) **Describe the solution you'd like** When adding a note to a payment, I'd like to take a picture...

the rational is the same as [here](https://github.com/Coldcard/ckcc-protocol/pull/54#issue-3556656011), recent systemd updates bring some breaking changes. I noticed it w/ NanoS & PGP App, the device were only reachable at it's first...

Bip draft: Bitcoin Encrypted Backup

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This is a bip for encrypted backup, an encryption scheme for bitcoin wallet related metadata. Mailing list post: https://groups.google.com/g/bitcoindev/c/5NgJbpVDgEc