feat: wire the send flow and add LAN deployment helpers - #8
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added 3 commits
September 17, 2026 16:31
SendPage now creates a proposal through the BWS API (outputs only, so the server performs UTXO selection excluding token UTXOs, computes the fee and creates change), signs it with the device credentials, broadcasts when the signature threshold is reached, and shows a waiting-for-co-signers state otherwise. Validation covers recipient addresses, dust threshold and amount parsing; the throwing bwc stubs are removed. Adds scripts/lan-web-server.js (static SPA server that proxies /bws to the API, same-origin so no CORS) and scripts/lan-deploy.sh (Docker-based API/web deployment for the Raspberry Pi, where Postgres already runs).
Node 26 no longer bundles corepack, so the container had no pnpm and crash-looped with exit 127.
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📝 WalkthroughWalkthroughThe pull request adds wallet address validation, account-key migration, send-max transaction support, fee and dust handling, multisignature payment states, LAN deployment, and PostgreSQL backup tooling. ChangesPayment flow
LAN deployment and database backups
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Sequence Diagram(s)Web payment proposal flowsequenceDiagram
participant SendPage
participant createAndSendPayment
participant API
SendPage->>createAndSendPayment: validated payment options
createAndSendPayment->>API: create transaction proposal
createAndSendPayment->>API: sign proposal
API-->>createAndSendPayment: broadcast transaction or pending proposal
createAndSendPayment-->>SendPage: proposal and optional transaction ID
LAN deployment flowsequenceDiagram
participant lanDeploy
participant APIContainer
participant WebContainer
participant lanWebServer
lanDeploy->>APIContainer: start API container
lanDeploy->>WebContainer: start web container
WebContainer->>lanWebServer: serve frontend files
lanWebServer->>APIContainer: proxy API request
lanDeploy->>APIContainer: check health endpoint
Suggested reviewers: Merge Risk: 🟠 High · up to The change can prevent payment retries, accept wrong-network addresses, expose LAN wallet traffic to modification, misreport failed deployments, and publish or prune invalid backups. These material issues should be fixed before merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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added 2 commits
September 17, 2026 16:51
Streams a pg_dump custom-format dump from the abcpay-postgres container, verifies it with pg_restore, prunes rolling dumps beyond KEEP, and supports a never-pruned baseline label for the pre-tester snapshot.
Pulls rolling and baseline dumps from the LAN host over scp and prunes local rolling copies beyond KEEP, so a Pi SD-card failure cannot lose backups.
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Funded end-to-end verified against the deployed LAN API (1000 XEC funded to a fresh v2 wallet): \ [destination->source 100 XEC] broadcast txid=843550ffceadb40e7e891013670de36e187769cb94d6230393ab304ba68269e4 Both directions confirmed through Chronik-backed balances/history, including change outputs and fees. The 'funded send' item in the test plan is complete; the remaining gap is a funded m-of-n multisig broadcast. |
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Multi-path funded matrix run against the deployed LAN API (real XEC, live Chronik):
Findings:
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added 2 commits
September 17, 2026 18:01
Coin selection now handles dust change: when the leftover would be an unspendable dust output it is donated to the fee, and when the balance cannot cover the target fee the whole remainder goes to the fee as long as the effective rate meets the minimum relay fee (1 sat/byte on XEC). This fixes the reported case of a 10 XEC wallet that could not send 6 XEC (600 sats + 452 fee > 1000) nor below the 546-sat dust limit; errors now state available, needed and minimum fee in sats. Client-supplied inputs compute fee from the estimated size and create change instead of treating the remainder as fee, dust below threshold is dropped. Client-registered addresses are validated against the wallet derivation (path -> derived address, script comparison) so foreign addresses can no longer be attached. Adds unit tests for dust donation, minimum-relay acceptance, insufficient-funds messaging and address validation.
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Small-balance bug reported from app use: a 10 XEC wallet could not send 6 XEC (600 sats + 452 target fee > 1000) and anything under the 546-sat dust limit was rejected, leaving a ~2-sat usable window. Fixed in \337939e:
Reproduced against the redeployed LAN API: Max sendable from a 1000-sat balance is now 774 sats (7.74 XEC) at the relay minimum; a server-side dust guard for raw API clients remains as a follow-up. |
added 3 commits
September 17, 2026 18:12
New sendMax proposal flag: the server selects every spendable UTXO (token-bearing ones excluded), computes the fee from the real transaction size and returns a single output for total minus fee, with no change output. wallet-core gains computeMaxSend with unit tests (single-sig, multisig sizing, dust and token-only guards). The send page gets a Send max toggle that disables the amount field and shows the eventual amount on the success/waiting screens.
Verifies a DER+hashtype transaction signature against a sighash and public key; used by diagnostics and tests to detect invalid signatures from rejected broadcasts.
wallet-client.generateKeys stored the root extended private key as xPrivKey while xPubKey was the account key, so wallet-core derived signing keys from the root (root/m/0/i) and every signature was invalid for the funded address - the node rejected broadcasts with the shared NULLFAIL error (Signature must be zero for failed CHECK(MULTI)SIG operation). Reproduced against the live data: the stored signature did not verify for the proposal sighash, while the locally assembled tx matched the rejected txid exactly. generateKeys now returns the account key, and existing credentials on disk are repaired on load by re-deriving the account key from the stored mnemonic (candidate coinTypes 1899/899/default, adopted only when the derived xpub matches the stored one). Verified: old root-key signatures fail verification, account-key signatures pass, and createCredentials reproduces the app account xpub exactly.
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Broadcast failure reported from the app (NULLFAIL: 'Signature must be zero for failed CHECK(MULTI)SIG operation') root-caused and fixed in \ |
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Inline comments:
In `@apps/abcpay-api/src/lib/address-validation.ts`:
- Line 7: Update the scriptKey construction in the address validation flow to
include decoded.prefix for XEC addresses, while preserving the existing type and
hash components. Add a test using the same derived script encoded with both
ecash and ectest prefixes, verifying that the opposite-network address is
rejected during registration.
In `@apps/abcpay-api/src/services/tx-proposal.service.ts`:
- Around line 150-151: Update the dust-change branch in the transaction proposal
calculation so that when non-negative change is below dust and changeAddress is
cleared, fee is set to totalIn minus amount, including the omitted change in the
reported fee.
In `@packages/abcpay-wallet-core/src/coinselect.ts`:
- Around line 54-63: Update the input selection flow around isSpendableUtxo and
estimateTxSize so it chooses the spendable UTXO subset that maximizes totalInput
minus the fee, rather than always using every spendable input; preserve the
existing no-spendable-balance and dust checks after selecting that optimal
subset.
- Around line 52-82: Clamp the effective fee rate to at least
minRelayFeePerKb(coin) using the maximum of the relay minimum and
requested/default rate in computeMaxSend, selectUtxos, and the explicit-input
branch of TxProposalService.createProposal. Keep the small-balance fallback
threshold comparison against the actual relay minimum, and preserve the
resulting clamped fee through transaction assembly.
In `@packages/abcpay-wallet-core/src/tx.ts`:
- Around line 163-164: Update verifyInputSignature to accept the expected coin
or sighash type, validate the final byte of signatureHex against it before DER
verification, and return false for mismatches. Update its callers, including
assembleTxHex-related verification flow, to pass the expected type while
preserving the existing secp256k1 verification for valid suffixes.
In `@scripts/lan-deploy.sh`:
- Around line 50-56: Update the health-check loop in the deployment script to
track whether a check succeeded, and after all 180 attempts exit nonzero when no
check passed. In that failure path, include recent logs from the abcpay-api
service before exiting; preserve the existing success message and URL output for
healthy deployments.
- Around line 29-30: Update the password extraction used by DATABASE_URL to
preserve the complete POSTGRES_PASSWORD value after the first “=” and
percent-encode it for URI safety before interpolation. Keep the existing PG_ENV,
PG_PORT, and connection target unchanged, and apply the change to the
PG_PASSWORD and DATABASE_URL assignments.
In `@scripts/lan-web-server.js`:
- Around line 45-46: Replace the cleartext http.createServer listener in the LAN
web server with HTTPS serving, using a configured certificate and private key,
or require deployment behind a TLS-terminating proxy before exposing the wallet
UI on the LAN. Ensure the server no longer publishes executable SPA content
directly over HTTP.
- Line 49: Update the request-path handling around requestPath so
decodeURIComponent failures are caught and respond with HTTP 400 Bad Request,
then stop processing that request. Preserve normal decoded-path handling for
valid URLs and prevent the URIError from terminating the server.
- Around line 49-57: Update the static-file containment check after path.join in
the request handling flow to use component-aware containment: allow DIST itself,
but reject paths outside DIST by comparing against DIST plus path.sep or by
validating path.relative results for absolute and parent traversal. Preserve the
existing 403 response for rejected paths.
In `@scripts/pg-backup.sh`:
- Line 22: Update the backup flow around pg_dump to write output to a temporary
file, verify the dump command and temporary file succeed, then atomically rename
it to $FILE; ensure failed or incomplete dumps never leave a publishable $FILE
for scripts/pull-backups.ps1.
In `@scripts/pull-backups.ps1`:
- Line 20: Update the backup retrieval flow after the scp invocation to check
$LASTEXITCODE and terminate with a nonzero status when scp fails, before any
local pruning or stale-backup listing runs. Preserve the existing successful
path and pruning behavior when scp exits successfully.
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apps/abcpay-web/tsconfig.tsbuildinfois excluded by!**/*.tsbuildinfo
📒 Files selected for processing (17)
apps/abcpay-api/src/lib/__tests__/address-validation.test.tsapps/abcpay-api/src/lib/address-validation.tsapps/abcpay-api/src/services/tx-proposal.service.tsapps/abcpay-api/src/services/wallet.service.tsapps/abcpay-web/src/context/WalletContext.tsxapps/abcpay-web/src/lib/bwc.tsapps/abcpay-web/src/lib/tx.tsapps/abcpay-web/src/lib/wallet-client.tsapps/abcpay-web/src/pages/SendPage.tsxpackages/abcpay-models/src/wallet.tspackages/abcpay-wallet-core/src/__tests__/crypto.test.tspackages/abcpay-wallet-core/src/coinselect.tspackages/abcpay-wallet-core/src/tx.tsscripts/lan-deploy.shscripts/lan-web-server.jsscripts/pg-backup.shscripts/pull-backups.ps1
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- apps/abcpay-web/src/lib/bwc.ts
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The server now rejects a proposal when the broadcast itself fails, recording an action with the node error so nothing stays accepted-but-unbroadcastable, and the error still propagates to the caller. The wallet page shows a Broadcast button for accepted proposals that have all required signatures (useful when the last signer disconnected before broadcasting) and refreshes the list in every outcome, so a failed broadcast disappears immediately with the reason shown.
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UX follow-up from the stuck proposal report (implemented in
Verified against the deployed API with a fabricated input (no funds spent): |
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Inline comments:
In `@apps/abcpay-api/src/services/tx-proposal.service.ts`:
- Around line 279-288: Update the broadcast-error handling around the imported
broadcastTx failure to record a broadcast_error action instead of a copayer
reject, and preserve the proposal’s existing status when persisting the update.
Extend txProposalSchema’s action type enum to accept broadcast_error alongside
accept and reject.
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apps/abcpay-api/src/services/tx-proposal.service.tsapps/abcpay-web/src/lib/tx.tsapps/abcpay-web/src/pages/WalletDetailPage.tsx
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…ipts) wallet-core: clamp the effective fee rate to the minimum relay fee in selectUtxos and computeMaxSend and use the true relay minimum for the small-balance fallback; computeMaxSend now picks the input prefix that maximizes the sent amount instead of including uneconomic inputs; verifyInputSignature accepts an optional coin and rejects a mismatched sighash-type byte (the trailing-byte check was previously skipped). API: client-supplied inputs report the actual fee when dust change is dropped; explicit opposite-network XEC prefixes are rejected on address registration while prefixless legacy addresses stay accepted; broadcast failures are recorded as a broadcast_error action (schema updated). Scripts: lan-deploy parses the full password after the first = and percent-encodes it, and fails the deploy with API logs when the health check never succeeds; lan-web-server returns 400 on malformed URL encoding, uses path.relative containment, and supports TLS_CERT/TLS_KEY with a cleartext warning; pg-backup writes to a temp file, verifies, then atomically renames; pull-backups checks scp exit code before pruning.
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All 13 findings addressed in Fixed
Partially fixed (documented decisions) Verification on the deployed build ( |
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Summary
Wires the missing send flow and adds the LAN deployment used for the test build.
Send flow (web)
SendPagenow: validates recipient withwallet-core, enforces the dust threshold, creates a proposal viaPOST /v3/txproposals/with outputs only (server performs UTXO selection — token UTXOs excluded — computes the fee and creates a change address), signs with the device credentials, broadcasts automatically when the threshold is met, and shows a "waiting for co-signers" state for multisig.createAndPublishTx/signAndBroadcastTxstubs frombwc.ts.LAN deployment helpers
scripts/lan-web-server.js— zero-dependency static SPA server that proxies/bwsto the API (same origin, no CORS dependency).scripts/lan-deploy.sh— Docker-based API + web deployment for the Raspberry Pi (Postgres already runs there): creates the network, runsnode:26-bookwormfor the API (installs pnpm via npm — Node 26 no longer bundles corepack) andnode:26-alpinefor the web server, persists the pnpm store, waits for API health.Deployment verification (Raspberry Pi, LAN)
/bwsproxy and JS asset all return 200 from another LAN machine.accepted).Test plan
pnpm -r type-check,pnpm -r test(55 tests), web production buildscripts/lan-deploy.shon the Pi and verified from a second machineNotes
http://192.168.31.149:8080(LAN only). The web bundle was built from this branch; redeploy frommainafter the open PRs merge.Summary by CodeRabbit
New Features
Bug Fixes