262998747e1d449a58b0806324eb5fc1ed0efc4f
2
Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 archipelagoandClaude Opus 5
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262998747e |
feat(10-05): report BIP-32 key origin on lnd.create-psbt, and record the honest signing posture (D-07b/D-09)
With Bitcoin Core's wallet deleted, LND's PSBT round trip is the only external-signer path Archipelago has, and D-09's key-origin protection moves from Core descriptors (of which none remain) to the PSBT itself. Adds `psbt_key_origin_report(&str) -> Result<PsbtKeyOriginReport>` to lnd/wallet.rs, reporting `input_count`, `inputs_with_key_origin` and `all_inputs_have_key_origin`. An input counts as carrying key origin when either its `bip32_derivation` or `tap_key_origins` map is non-empty. A PSBT with zero inputs reports false rather than vacuous truth. Parsed with the already-present `bitcoin` and `base64` crates; no dependency added. `lnd.create-psbt` gains an additive `key_origin` object on its response and a `tracing::warn!` with the counts when key origin is missing, because that is the exact condition under which a hardware signer refuses the PSBT. Computed best-effort: a decode failure degrades to `null`, never to an error, so a user's send cannot fail because an inspection helper could not parse something. `handle_lnd_finalize_psbt` and `handle_lnd_create_raw_tx` (which deliberately auto-signs with LND's hot keys) are untouched. Three tests, with fixtures built programmatically from the `bitcoin` crate rather than pasted as opaque base64: with-derivations, without-derivations, and malformed-is-an-error-not-a-panic. KEY-03-SIGNING-POSTURE.md gains an honest per-step coverage map of the fund -> export -> sign offline -> import -> finalize -> broadcast round trip. Of six steps, only the new inspection has automated coverage; steps 1, 4, 5 and 6 have none, and there is no air-gap transport (no animated QR, no .psbt file exchange) — export/import is copy-paste of base64. Untested paths are named as untested. Records the verdict that decides whether any of this is an air gap: on a default node an external signer CANNOT meaningfully sign a PSBT from `lnd.create-psbt`, because LND holds the keys for every input it selects. Evidence: the PSBT is funded from LND's own wallet; `ensure_wallet_initialized` creates a full key-holding wallet via /v1/initwallet; the generated lnd.conf carries no `remotesigner.*` block; and a search of apps/, scripts/, core/archipelago/src and image-recipe/ for remotesigner/createwatchonly/ nochainbackend returns zero matches. No fleet node is provisioned watch-only. What ships is PSBT transport, not air-gapped custody — the gap is provisioning, not plumbing. Adds the standing honesty statement in its own subsection: Lightning channel, revocation and HTLC keys are NOT air-gappable at all. They must sign in real time to answer counterparty commitments; remote signing relocates them to a hardened host, it does not cool them. Also adds a status banner to PSBT-SIGNING-ARCHITECTURE.md recording that its Phase 1 was superseded by deletion rather than delivered, so §0's "single highest-value change" and §2.1's invariant now read against a code path that no longer exists. Banner only; §5.4's honesty table is byte-identical. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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archipelagoandClaude Opus 5
|
9622926868 |
fix(10-05): delete the Bitcoin Core wallet path that duplicated the spending key (F-13, D-07b)
`handle_bitcoin_init_wallet_from_seed` derived the BIP-84 account extended *private* key, stringified it, and imported `wpkh(xprv/0/*)` / `wpkh(xprv/1/*)` into a Bitcoin Core descriptor wallet created with `disable_private_keys=false` and an empty passphrase. That put a second copy of the node's spending key in Core's `wallet.dat`, outside the daemon's Argon2 + ChaCha20-Poly1305 envelope. That duplication into weaker protection was audit finding F-13 (High). Deleted rather than rewritten watch-only (D-07b supersedes D-07/D-07a): - No caller anywhere. Repo-wide search leaves exactly one occurrence of the method name (its own dispatcher registration) and two of the symbol in code (definition + dispatch call); every other hit is prose in docs. - LND is the wallet the product drives. Across neode-ui/src every `bitcoin.*` call is read-only status (getinfo/prune-status/onion); the wallet UI sends via `lnd.sendcoins`. - It never ran on archi-dev-box: no wallet named `archipelago` exists there, and the one loaded wallet reports blank=true, keypoolsize=0, txcount=0. - It was authenticated AND password-gated, so F-13 was key-at-rest duplication, not an exposed endpoint. No migration is performed and none is planned. This removes code, not wallets: nothing on disk is touched, no funds move, no wallet.dat is modified. If a node is ever found holding a wallet this handler created, that is a finding to surface and stop on, not a trigger to auto-migrate. `seed::derive_bitcoin_xprv` loses its only non-test caller and is retained deliberately with `#[allow(dead_code)]` and a stated reason: it keeps its existing test coverage and it is the derivation D-07c's deferred BDK cold vault will need. Records the evidence, the D-08/D-09 consequences and the D-07c deferral in docs/security/KEY-03-SIGNING-POSTURE.md. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |