[BitcoinQnA]

Summary

The next batch for the upcoming release. Nothing here is released yet.

New

• QR scanning. One scanner, using the camera or an image you pick, is shared by two tools:
  • Enter words reads a SeedQR, Compact SeedQR or seed-words QR into the word boxes so you can check them. Nothing loads until you press Load Seed. That matters because a Compact SeedQR has no checksum: any bytes decode to a seed that looks valid.
  • PSBT Inspector reads a plain PSBT QR, or an animated UR code (ur:psbt or ur:crypto-psbt) with a progress bar, and then inspects it. It only reads; there's no signing.
  • Decoding runs in the page with jsQR and bc-ur, bundled by a new build_qrscan.js. Nothing is sent anywhere, and it works under the page's Content Security Policy.
• Standard SeedQR now appears next to Compact SeedQR. This adds numeric mode to the QR library, so the codes are 25×25 for 12 words and 29×29 for 24, the sizes SeedSigner uses.
• Nostr Keys is a new tool covering NIP-06 (m/44'/1237'/n'/0/0) and the BIP-85 Nostr application (m/83696968'/128002'/identity'/account'). It shows npub and nsec, hex keys, and a QR for the npub.
• Output descriptors in Derived Addresses for BIP-44, 49, 84 and 86 accounts:
  • the combined <0;1> form, plus separate receive and change descriptors
  • key origin and BIP-380 checksum included
  • a QR code for the combined descriptor
• The passphrase tester takes a list. You set how many addresses to check per passphrase, and it shows progress, a Stop button, and "Use this passphrase" on a match. Taproot (m/86') paths now give Taproot addresses; before, they fell back to legacy.

Improved

• The seed input tabs have text labels: Generate, Enter words and From entropy.
• Word boxes:
  • They're checked as you type and when you leave them, with the nearest word suggested.
  • Load Seed marks the bad box and explains a checksum failure.
  • Each box has a label, and spellcheck and autocorrect are off, since some browsers send typed text to an online spellchecker.
• Clear seed also wipes the new fields.

Reference vectors. test/keys.test.js pins the bundled libraries before the planned library upgrade. It covers:

• all 24 English BIP-39 vectors
• BIP-32 vector 1
• BIP-85, both raw derivations and every application through the tool's own code
• NIP-06 and BIP-85 Nostr
• BIP-380
• BIP-84 and BIP-86 addresses derived from the descriptors
• SeedQR

Test plan

• npm test: all 7 suites pass. There are 20 new tests: keys (10), qrscan (4) and ui (6).
• The built page, run in a browser under its CSP:
  • the tab labels appear, and a wrong word is flagged as you type
  • a SeedQR image fills the word boxes and loads only on Load Seed
  • the standard SeedQR card decodes back to the right digits
  • the BIP-84 and BIP-86 descriptors match
  • the passphrase list finds the right passphrase at the right index
  • Nostr keys match, and identity 0 is refused
  • the PSBT scanner rebuilt the demo PSBT from 10 animated frames and inspected it
  • Clear seed wipes the new fields
  • 0 CSP violations, and no overflow at 375px
• Not tested: a live camera, because the test browser has none. Worth trying on a phone once this is released. Also try it in the downloaded file in Safari, which may refuse camera access for local files; the image option covers that case.
• dist/index.html is 11.15 MB, 0.41 MB more than before. Most of that is the scanning bundle.

🤖 Generated with Claude Code