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Foundation-Devices / passport-firmware

Firmware for Passport v1
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[Feature] Restore seed via Qr-code #82

Open Transisto opened 2 years ago

Transisto commented 2 years ago

Blockstream Jade and Seed Signer does that,

Also Coldcard export BIP-85 entropy via QR

Note that CC seed QR import only include first 4 character per word. And Seedsigner has it's own format that renders as a digits only. Jade import full text QR-code.

BitcoinQnA commented 2 years ago

Certainly something we'd like to explore once Batch 2 and Envoy are released. As you have already suggested, there doesn't seem to be a standard emerging for Seed QRs just yet, likely due to the differing hardware limitations.

BIP85 is absolutely on our roadmap.

Transisto commented 2 years ago

https://github.com/Blockstream/Jade/issues/39

I think having first 4 letters (or more) should be the standard, as that's how most wallet let you fill in the seed.

FYI Blue Wallet support scans of 4 letters/words so might want to check their code when implementing.