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Max button: fill the amount field with the computed maximum (n inputs, 1
output, current fee rate) so it gives visible feedback instead of just
blanking/disabling the field.
Rate limits: eliminate look-ahead (gap limit 1 — stop at the first unused
address, safe because we only ever expose one unused address at a time),
query one address at a time (API concurrency 1, 400ms spacing across two
backends), scan chains sequentially, and pause 500ms after each used address.
An empty scan is now ~2-3 requests instead of ~10+.
History cache: persist scanned state (addresses, utxos, txs, indices) in
localStorage keyed by sha256(seed) — the seed itself is never stored. Re-
importing the same seed in this browser shows the last-known balance/history
instantly while a fresh scan runs. Cleared by nothing automatically (public
chain data); different seeds get separate keys.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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- Remove the online/live status badge and the USD price line, which both
appeared after load and caused layout shift. Stop fetching price entirely.
- Persist the seed + passphrase in sessionStorage so a page refresh restores
the open wallet instead of returning to the unlock screen. Cleared on
logout and (by the browser) when the tab closes.
Note: sessionStorage holds the seed in plaintext for the tab session — an
acceptable tradeoff for this self-custody tool and scoped to the tab.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Relying solely on the mempool WebSocket was unreliable: it only pushes new
events (no replay), and pushes can be missed (drops, server quirks), so a
deposit could go unseen with no manual refresh to fall back on.
- Add a 12s background poll alongside the WebSocket.
- Make background refreshes "silent": scan({silent:true}) re-renders only when
the visible state (utxos/txs/fresh indices) actually changes, so polls never
flash the UI or steal input focus while typing.
- Skip fees/price fetches on routine polls to keep request volume low.
- WS events now trigger the same silent refresh (debounce 800ms).
Unit-tested: silent refresh emits once when a pending deposit appears and not
at all when nothing changed.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Drop the heading, privacy note, derivation path, and the "View all addresses"
list. Remove the now-unused addressBook and showAddrs state.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Remove the standalone Coins (UTXO list) tab and fold snapshot import/export
into a new Settings tab alongside the recovery-phrase reveal. Offline
fallback, goHome, the offline banner, and post-import navigation now point at
Settings. (Manual coin selection still lives in the Send form.)
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Prevents accidental Logout clicks when reaching for Backup. Backup is now a
tab rendering the gated recovery-phrase reveal inline; Logout is the only
header button. The phrase re-masks whenever tabs change.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Opening Backup now shows the warning with the 12 words masked (••••••) and a
Proceed/Cancel choice. The real words and passphrase are kept out of the DOM
until Proceed, so the user reads the "make sure nobody is watching" warning
before anything sensitive renders.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Anyone who skipped backup verification (or just wants to re-check) can now
reveal the seed words and passphrase from a header "Backup" button that opens
a warning-gated modal with copy actions.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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The Tools page held a now-redundant manual offline toggle (we auto-detect),
a small wallet-info blurb, and the offline snapshot import/export. Drop the
page and relocate snapshot import/export to the Coins tab. Offline fallback
and goHome now land on Coins; the offline banner points there.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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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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Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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The "CORS" errors were 429 Too Many Requests (a 429 has no CORS headers, so
the browser reports it as a CORS failure). SSL/hosting is irrelevant.
Per-request retries made it worse by multiplying load on an already
rate-limited host. Replace with:
- round-robin across two Esplora-compatible backends (mempool.space +
Blockstream), halving per-host load
- park a host on an 8s cooldown when it 429s instead of retrying it
- keep the global throttle (2 concurrent, 200ms gap)
- map Blockstream's /fee-estimates to the named fee tiers
Unit-tested rotation/cooldown; live scan of 40 addresses now completes in
~8s with no failures.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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The "CORS" errors during scan were actually mempool.space rate-limiting:
bursting ~40 address lookups gets some throttled, and throttled responses
lack the access-control-allow-origin header, which the browser reports as a
CORS failure.
- api.js: route all requests through a global throttle (max 2 concurrent,
250ms min gap between starts, ~4 req/s) with exponential backoff retry so
occasional throttles recover instead of failing. Unit-tested spacing +
retry recovery.
- Import pane: drop the "(12 or 24 words)" parenthetical (we generate 12),
and replace the scrunched ellipsis placeholder with an enumerated
word1..word12.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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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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