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- Remove the unlock-screen "Offline mode" checkbox and network selector.
Always mainnet. Attempt a scan on open; if navigator is offline or the
scan fails (network unreachable), fall back to offline automatically with
a banner + Retry instead of an upfront toggle.
- Drop the manual balance "Refresh" and receive "Check for payments"
buttons; the WebSocket keeps things current.
- Update balances silently: add a wallet.loaded flag so the balance only
dims on the very first load and history/coins only show a spinner before
the first load. Background WS-driven rescans no longer flash spinners.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Since the wallet only ever exposes one unused receive address at a time,
used addresses stay contiguous (gap never exceeds 1), so a gap limit of 5 is
a safe margin and cuts a scan from ~40 to ~10 requests.
Also reword the receive note: the address advances automatically (via the
realtime WebSocket) when paid, so drop the confusing "scan again".
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Replace the SvelteKit/daisyUI prototype with a vanilla JS + hand-rolled CSS
app that Bun bundles (code + scure/noble crypto + QR + CSS) into one
self-contained dist/index.html runnable offline from file://.
Wallet core (src/wallet.js):
- BIP84 native-segwit HD wallet from BIP39 seed (+optional passphrase)
- gap-limit scan of receive/change chains, aggregate balance, tx history
- fresh receive/change addresses; signs with witnessUtxo only (enables
offline signing with no prev-tx fetch)
- coin selection + fee estimation via btc-signer selectUTXO; send-max;
manual coin control
- offline JSON snapshot export/import (keyless) + signed-tx hex/QR export
- realtime mempool.space WebSocket: track-addresses -> debounced auto
refresh of balances/history (no polling); live status badge
UI (src/app.js): clean light paper-wallet; create (with optional, skippable
backup verification) / import flow; receive (QR) / send / history / coins /
tools tabs; clickable logo returns home.
API (src/api.js): mempool.space wrapper with retry/backoff for scan-burst
rate limiting; single network choke-point for offline enforcement.
Verified: BIP84 spec vectors, build/sign/parse for auto/max/manual flows,
snapshot roundtrip, live scan + WebSocket, headless-Chrome UI smoke tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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