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LNURLVerify: a Lightning address tab on the Lightning setup page - #158
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… another A regtest store pointed at a mutinynet Lightning address failed every invoice with "Invalid BOLT11: Invalid prefix", and Lightning silently left the checkout: the LNURL issues signet (lntbs) invoices. Saving such a connection is now refused, from the invoice the verify probe already requests, and invoice creation reports both networks instead of the parser's prefix error. The check adds no invoice request. The probe also returns whether its answer carried verify and verifyBatch, which the setup page in the next commit shows. Three probe fixtures handed a mainnet lnbc1 invoice to a regtest receiver, the case now refused; they use lnbcrt1. TestBolt11 can mint another network's prefix, for a real signed lntbs fixture.
The Lightning setup page gets a third tab, "Lightning address": one input for an address or LNURL, looked up on debounced input, on blur and when the tab opens, through a new store-scoped POST endpoint (LnurlRailSettings Resolve, the rails page's authorization; antiforgery-checked like every UI POST). Its card shows the target and domain, min/max sendable, whether LUD-21 verify and verifyBatch are supported, and every paymentOptions entry with its bounds, availability, verifiability, CAIP-19 asset and unit, and whether checkout would offer it or why not. Those reasons come from the plugin's own planning, run against the store as Save would leave it: LnurlRailProvisioning.Refusal (Desired now goes through it), DesiredTokens, PaymentOption.PlanLightning and TokenOption. The page's JS only displays them. Save writes type=lnurl;value=<input> into the host's connection string while the tab is active, so BTCPay's own validation runs as before, and a failed save reopens the tab with its error. A store already on an LNURL opens on the tab, looked up. The Custom tab's help accordion is gone. Rail switches and "request every rail when the checkout opens" stay on the LNURL rails page, which the card links: rails exist only after the first save, so switches here would have nothing to act on. A lookup costs the LNURL one probe invoice, as saving does, since verify is only learnt from a callback answer. The card changes only once an answer arrives: changing it on the blur that pressing Save causes moved Save from under the click. TokenCheckoutBrowserTests.Start is shared with the new browser test.
…ng an invoice The Lightning address tab's lookup ran the verify probe, so every lookup minted an invoice: on debounced input, blur, Enter, tab show, and every reopen of a saved store's setup page. On lnurl-server, a probe for an address with no live wallet session is an intent-solver swap plus a settlement row, and solver quotes are rate-limited, so typing an address burned several. The lookup now reads the payRequest alone. The card keeps the target, the bounds, and each option with its limits, availability, its own verifiable flag, and whether checkout would offer it. LUD-21 verify support and the invoice network, which only a callback answer reveals, are left to the probe BTCPay already runs on save (one invoice, unchanged); the card says so, and a refused save reopens the tab with the error. The summary drops its probe-only fields (saveError, verify, verifyBatch). Tests: a lookup makes zero callback requests, counted by FakeHttp and, in the browser test, by the stub. The browser test first saves an LNURL that issues mutinynet (lntbs) invoices: the refusal names both networks inside the tab, after exactly one callback.
…port LNURLReceiver.Probe was split out so the setup page's lookup could report verify and verifyBatch. The lookup no longer probes, so those outputs were dead: the probe is back inside CheckVerifySupport and returns only its error. The network-mismatch check and its tests are unchanged.
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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughAdds a Lightning address setup tab that previews LNURL payment options before saving. Setup lookups fetch payRequest data without requesting a callback invoice. Probe and invoice creation paths report recognized invoice network mismatches. ChangesLNURL setup and verification
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Merchant
participant LightningSetupTab
participant LnurlRailSettingsControllerResolve
participant LnurlSetupSummaryRead
participant LNURLPayRequestEndpoint
Merchant->>LightningSetupTab: Enter a Lightning address or LNURL
LightningSetupTab->>LnurlRailSettingsControllerResolve: POST resolve with the LNURL
LnurlRailSettingsControllerResolve->>LnurlSetupSummaryRead: Read setup summary
LnurlSetupSummaryRead->>LNURLPayRequestEndpoint: Fetch payRequest JSON
LNURLPayRequestEndpoint-->>LnurlSetupSummaryRead: Return payRequest JSON
LnurlSetupSummaryRead-->>LightningSetupTab: Return setup summary
LightningSetupTab-->>Merchant: Display options and availability
Merge Risk: ⚪ Minimal · up to The Lightning address setup tab and network validation show no remaining concrete merge-blocking risk in the reviewed changes. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 19.30% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 57 functions across 14 files. (2 skipped: 2 unsupported.)
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🧪 Generate unit tests (beta)
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Actionable comments posted: 4
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @Plugins/BTCPayServer.Plugins.LNURLVerify/LNURLReceiver.cs:
- Around line 59-60: Update CheckVerifySupport to require a string invoice in
the callback response and validate it before returning success; responses
without a valid invoice must not produce a successful probe. Update prefix-only
probe fixtures to include valid invoices.
Review comments at
@Plugins/BTCPayServer.Plugins.LNURLVerify/LnurlSetupSummary.cs:
- Line 61: Update the option-status logic in LnurlSetupSummary so `Available`
does not change whether a configured token network is marked `Offered`; retain
`Unavailable` in the status flags when availability is false. Update
`LnurlSetupSummaryTests.An_option_reported_unavailable_is_not_offered_now` to
assert that an unavailable network remains offered.
- Around line 55-56: Update the reason-selection flow in the setup summary to
check each option’s explicit store exclusion before assigning a null Reason,
including token options handled by DesiredTokens. Preserve the existing behavior
when store configuration is missing before the first save; do not treat missing
configuration as an exclusion.
Review comments at
@Plugins/BTCPayServer.Plugins.LNURLVerify/Views/Shared/LNURLVerify/LNPaymentMethodSetupTab.cshtml:
- Around line 46-68: In the LNURL preview’s resolve function, prevent stale
lookup results from rendering after the input changes by checking the current
trimmed input against the requested value before rendering. In the input event
handler, clear the existing preview immediately when the user edits the address,
while preserving the debounce behavior.
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BTCPayServer.Plugins.LNURLVerify.Tests/LNURLReceiverTests.csBTCPayServer.Plugins.LNURLVerify.Tests/LnurlRailProvisioningTests.csBTCPayServer.Plugins.LNURLVerify.Tests/LnurlSetupSummaryTests.csBTCPayServer.Plugins.LNURLVerify.Tests/TestBolt11.csBTCPayServer.Plugins.Tests/LNURLVerify/LightningSetupBrowserTests.csBTCPayServer.Plugins.Tests/LNURLVerify/StubLnurl.csBTCPayServer.Plugins.Tests/LNURLVerify/TokenCheckoutBrowserTests.csPlugins/BTCPayServer.Plugins.LNURLVerify/LNURLReceiver.csPlugins/BTCPayServer.Plugins.LNURLVerify/LNURLVerifyPlugin.csPlugins/BTCPayServer.Plugins.LNURLVerify/LnurlRailProvisioning.csPlugins/BTCPayServer.Plugins.LNURLVerify/LnurlRailSettingsController.csPlugins/BTCPayServer.Plugins.LNURLVerify/LnurlSetupSummary.csPlugins/BTCPayServer.Plugins.LNURLVerify/PaymentOption.csPlugins/BTCPayServer.Plugins.LNURLVerify/README.mdPlugins/BTCPayServer.Plugins.LNURLVerify/VERIFICATION.mdPlugins/BTCPayServer.Plugins.LNURLVerify/Views/Shared/LNURLVerify/LNPaymentMethodSetupTab.cshtmlPlugins/BTCPayServer.Plugins.LNURLVerify/Views/Shared/LNURLVerify/LNPaymentMethodSetupTabhead.cshtml
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CheckVerifySupport passed a callback answer that carried verify but no pr, so Save accepted an LNURL whose every CreateInvoice then failed with "did not return an invoice". The probe now requires pr as a string, checks its network first, so a mutinynet invoice is still named as one, then parses it with the store's network, and refuses with a plain message when the invoice is missing or unreadable. Three probe fixtures used the bare prefix lnbcrt1, which a real parse rejects; they are now signed TestBolt11 invoices at the amount each probe requests.
… as not offered The setup card called an option offered even when the store had switched its rail or asset off on the LNURL rails page, an exclusion core applies at invoice creation and that DesiredTokens, which only decides provisioning, never checks. The card now reads the store's exclusions and gives the switch as the reason. A rail with no config yet, before the first save, is not switched off and stays offered.
…tup card Checkout treats a token option advertising available:false as a transient outage: LnurlTokenRequester throws TransientRailException, and the network stays on offer with a retry. The card called it not offered. It now shows it offered, with the row's unavailable flag. BTC rails already matched checkout: LnurlRailRequester refuses a rail with no available option, and the checkout hides a refused rail, so "not offered" stays. Lightning likewise, as PlanLightning refuses when no lightning option is available.
…ed on The tab dropped an answer only when a newer lookup had started. After the input changed from A to B, B's lookup waits out the 600 ms debounce, so A's answer could land in that window and render A's card under B. An answer is now also dropped when the input no longer holds its value, and the lookup is forgotten so that returning to A looks it up again. The browser test holds A's lookup with a Playwright route, types B, releases A with a fake summary, and waits for B's own lookup before asserting A never rendered. Before the fix it failed with the card showing A.
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Brings in #159 (FixedFloat rails) and #160 (payer IP). - StubLnurl: both sides' members are kept. The callback counter runs before the FixedFloat branch, so token orders count as callbacks too. - TokenCheckoutBrowserTests: keeps this branch's static Start(test) and #159's Invoice(tester, payUrl, assets...); #159's FixedFloat test now calls Start(this). - ConnectionStringBuildTests: #160's save-probe test answered with a placeholder mainnet "lnbc1". This branch's Save now decodes the invoice and refuses a network mismatch, so the fixture answers with a real regtest invoice instead. - VERIFICATION: the descriptions of both sides are kept, and the count is 415, the suite after the merge.
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Setting a store up on a Lightning address meant knowing to type
type=lnurl;value=you@example.cominto the custom-node box, and nothing showed what checkout would then offer. This adds a third tab, "Lightning address", to the store's Lightning setup page, next to "Use internal node" and "Use custom node".The tab
type=lnurl;value=…into BTCPay's own connection string, so BTCPay's validation runs exactly as before. A failed Save reopens this tab with the error shown in it.The lookup endpoint is
POST plugins/{storeId}/lnurlverify/rails/resolve. It has the same authorization as the LNURL rails page, plus BTCPay's antiforgery check. It is a POST because it makes the server fetch a URL the user typed. That is the same reach BTCPay's own Save already has for atype=lnurlstring.Network mismatch. I found this testing #156 against mutinynet. A regtest store pointed at a mutinynet Lightning address created invoices with no Lightning option. The only trace was "Impossible to create lightning invoice (Invalid BOLT11: Invalid prefix)" in each invoice's log. Refusing the signet invoice is right; staying silent about why is not.
verifybut no usableprused to pass Save, and then every invoice creation failed.lntbsis matched beforelntb.Mutinynet test of #156. For the record, the live test behind that finding:
LNURLVerifyLnurlServerTests.Settles_through_lnurl_server_verifyBatch_without_per_invoice_requestspasses againsthttps://lnurl.mutinynet.arkade.sh.Verification
dotnet test BTCPayServer.Plugins.LNURLVerify.Tests -c Releasegives 361 passed, against a baseline of 347 on9b41b56.eafd1e9, the suite gives 415 passed. One test from feat(lnurlverify): send the payer's IP on a checkout's rail and token requests #160 needed its fixture fixed: its save probe answered with a placeholder mainnet invoice, and this PR's Save now decodes the invoice and refuses a network mismatch, so it answers with a real regtest invoice. The browser tests compile after the merge but were not re-run, because the ServerTester dependencies weren't up. Browser tests on a ServerTester host:LightningSetupBrowserTestsand the existingTokenCheckoutBrowserTests.A_payer_sees_each_networkboth pass (2/2).LightningSetupBrowserTestsruns Chromium with the checkout's security policy on, against a stub that issues mutinynet-stylelntbsinvoices and counts its callbacks. It asserts:type=lnurl;value=…;Not seen in a browser:
This and the FixedFloat rails PR both touch
PaymentOption.cs,TokenCheckoutBrowserTests.cs,README.mdandVERIFICATION.md. Whichever merges second resolves those.Summary by CodeRabbit