refactor(machine): drop VITE_LNBITS_HTTP_URL — lnurl now arrives populated from LNbits (#57 gap 2)

Closes gap 2 from coord log 2026-06-01T18:30Z. The LNbits withdraw
extension's nostr-transport RPC now populates `link.lnurl` from
`settings.lnbits_baseurl` (aiolabs/withdraw#1 / commit e9d911e), so the
ATM no longer needs a separate HTTP URL on the wire to compose the
LNURL-withdraw callback itself.

What goes:

- `VITE_LNBITS_HTTP_URL` env var (renderer + Electron main)
- `lnbitsHttpUrl` field on `LightningConfig`, `RuntimeConfig`, and the
  Window mirror in `src/types/electron.d.ts`
- The manual `${lnbitsHttpUrl}/withdraw/api/v1/lnurl/${unique_hash}`
  composition in `generateLnurlWithdraw`
- The `encodeLnurl` bech32 helper in `lightning.ts` (LNbits returns
  bech32-encoded; we just `.toUpperCase()` to match BOLT/LNURL convention)
- `@scure/base` dep from `apps/machine/package.json` (only used by the
  removed helper; clink still uses it directly)
- The `lnbitsHttpUrl` option + `LNBITS_HTTP_URL=…` env var + boot echo
  in `deploy/nixos/bitspire-atm.nix`
- Doc references in CLAUDE.md, README.md, deploy/nixos/README.md,
  docs/architecture-comparison.md, and the lightning-check skill

What stays:

- `link.lnurl` consumption, with an explicit error if LNbits returns
  null (which signals `LNBITS_BASEURL` is unset on the server side —
  better to fail clearly than silently)
- The receiver-side bech32 uppercasing (LNbits returns lowercase per
  the standard library)

Why this is a net win:

- Removes a config-drift surface — if LNbits's external URL moved
  (DNS, port, reverse-proxy rewrite), every ATM in the field would
  stop issuing redeemable LNURL-withdraw QRs until reconfigured.
  Now LNbits derives its own URL from `settings.lnbits_baseurl`,
  one source of truth.
- Removes an extra provisioning step. No more `LNBITS_HTTP_URL=…`
  before running `provision-atm.sh`; the relay + server pubkey suffice.
- Removes the misleading boot echo that triggered the §`18:30Z`
  smoke triage confusion ("LNbits HTTP: <url>" read like ATM-→-LNbits
  connectivity, when it was only ever a URL embedded in customer QRs).

Also adds a `# pragma: allowlist secret` marker above the
`VITE_ATM_PRIVATE_KEY` doc block in `.env.example` so the global
secret scanner stops false-positiving on the documentation prose.

Workspace typecheck + 24/24 apps/machine tests still green.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.claude/skills/lightning-check.md

@@ -75,7 +75,7 @@ LNbits transport requires NIP-44 v2, NOT NIP-04. Required checks:
 LNbits derives the calling account from the event signature. There is **no admin token, no API key, no client cert** on the ATM. Required checks:
 
 - [ ] No code stores or references an admin token
-- [ ] No code makes outbound HTTP to LNbits (other than via `VITE_LNBITS_HTTP_URL` for the LNURL-withdraw callback, which is the customer wallet's path — the ATM itself doesn't hit HTTP)
+- [ ] No code makes outbound HTTP to LNbits (the LNURL-withdraw callback URL embedded in cash-in QRs is the customer wallet's path — the ATM itself doesn't hit HTTP). Post aiolabs/withdraw#1 / `e9d911e`, the ATM does not even compose that URL: LNbits's nostr-transport returns `link.lnurl` populated from `settings.lnbits_baseurl`
 - [ ] The ATM's `identity.privateKey` is loaded once from `/var/lib/bitspire/.env` and never logged
 
 ### 4. Cash-out flow (`--lnbits`)
@@ -125,8 +125,10 @@ const link = await lnbits.createWithdrawLink(walletId, {
   is_unique: false,
 })
 
-const callbackUrl = `${CONFIG.lnbitsHttpUrl.replace(/\/+$/, '')}/withdraw/api/v1/lnurl/${link.unique_hash}`
-const lnurl = encodeLnurl(callbackUrl)   // bech32 HRP="lnurl", uppercase
+if (!link.lnurl) {
+  throw new Error('LNbits returned link.lnurl=null — check LNBITS_BASEURL on the server')
+}
+const lnurl = link.lnurl.toUpperCase()
 
 const subId = await lnbits.subscribePayments(walletId, {
   tag: 'withdraw',
@@ -139,8 +141,8 @@ Required checks:
 
 - [ ] `uses: 1` — single-use prevents replay
 - [ ] `min_withdrawable === max_withdrawable === ctx.satsAmount` — exact amount, no operator slippage
-- [ ] The LNURL is composed from `VITE_LNBITS_HTTP_URL` + `link.unique_hash` (the transport `lnurlw_create_link` returns `link.lnurl === null` — those fields are filled by HTTP views, not the create RPC)
-- [ ] bech32 encoding uses HRP `"lnurl"` and the result is uppercased per BOLT/LNURL convention
+- [ ] The LNURL comes from `link.lnurl` directly (LNbits populates it from `settings.lnbits_baseurl` over the nostr-transport per aiolabs/withdraw#1 / `e9d911e`); error out if it's null instead of falling back to a hardcoded HTTP URL
+- [ ] Uppercase the bech32 string per BOLT/LNURL convention (the LNbits side returns it lowercase)
 - [ ] Subscription filter is `tag: 'withdraw'` + `link_id: link.id` — this is what the withdraw extension stamps on settlement events
 - [ ] On session abort, the cleanup closure both unsubscribes AND deletes the withdraw link (so a half-completed session doesn't leave a redeemable QR alive on LNbits)
 

CLAUDE.md

@@ -71,7 +71,7 @@ bitSpire/
 4. Implements the four flow-critical `ATMServices` methods on top of LNbits:
    - `generateInvoice(msat)` → cash-out BOLT11
    - `watchInvoice(bolt11, cb)` → `subscribe_payments({payment_hash, max_seconds:600})` push
-   - `generateLnurlWithdraw(ctx)` → `lnurlw_create_link({uses:1, ...})`, compose callback URL from `VITE_LNBITS_HTTP_URL`, bech32-encode with HRP `lnurl`, subscribe for `tag:"withdraw", link_id` settlement push
+   - `generateLnurlWithdraw(ctx)` → `lnurlw_create_link({uses:1, ...})`, use `link.lnurl` directly (LNbits populates it from `settings.lnbits_baseurl` per aiolabs/withdraw#1 / `e9d911e`), subscribe for `tag:"withdraw", link_id` settlement push
    - `getAvailableBalance()` → wraps `lnbits.getBalance(walletId).balanceSats`
 
 `CashInView.vue` calls `atmStore.generateLnurlWithdraw()` directly when entering `displayingQR`; the state machine still invokes `generateNdebit` as an actor but its output is discarded (kept only to avoid an invasive state-machine rewrite).
@@ -84,7 +84,6 @@ Renderer reads (Electron IPC or Vite `import.meta.env`):
 |---|---|---|
 | `VITE_RELAY_URL` | yes | `ws://...` of the relay both ATM and LNbits subscribe to. Dev: `ws://localhost:5001/nostrrelay/test` (LNbits's bundled `nostrrelay` extension — no separate strfry container) |
 | `VITE_LNBITS_SERVER_PUBKEY` | yes | 64-char hex pubkey LNbits prints on startup (`docker logs lnbits \| grep 'Public key (share this)'`) |
-| `VITE_LNBITS_HTTP_URL` | yes | `http(s)://...` origin used to compose LNURL-withdraw callback URLs. The ATM itself never calls this URL — it's only embedded in the bech32 string customer wallets dereference |
 | `VITE_ATM_PRIVATE_KEY` | yes (prod) | 64-char hex. The ATM's nostr identity. Generates ephemeral on first boot if unset (dev only) |
 | `VITE_OPERATOR_PUBKEYS` | optional | Comma-separated hex pubkeys allowed to send kind-21003 management commands |
 

README.md

@@ -45,7 +45,6 @@ docker logs regtest-lnbits-1 | grep 'Public key (share this)'
 cat > apps/machine/.env <<EOF
 VITE_RELAY_URL=ws://localhost:5001/nostrrelay/test
 VITE_LNBITS_SERVER_PUBKEY=<paste pubkey from step 4>
-VITE_LNBITS_HTTP_URL=http://localhost:5001
 VITE_ATM_PRIVATE_KEY=$(openssl rand -hex 32)
 EOF
 

apps/machine/.env.example

@@ -30,15 +30,16 @@ VITE_RELAY_URL=ws://localhost:7777
 #   docker logs lnbits | grep 'nostr_transport pubkey'
 VITE_LNBITS_SERVER_PUBKEY=
 
-# LNbits HTTP root — used purely to compose the LNURL-withdraw callback
-# URL that customer wallets dereference. The ATM itself does not call
-# this URL; every ATM↔LNbits RPC goes over nostr-transport.
-VITE_LNBITS_HTTP_URL=http://localhost:5000
+# (LNbits HTTP URL is no longer needed on the ATM side — the
+# nostr-transport RPC `lnurlw_create_link` now returns `link.lnurl`
+# populated from `settings.lnbits_baseurl` on the LNbits server. See
+# aiolabs/withdraw#1 / commit e9d911e.)
 
 # =============================================================================
 # ATM Identity
 # =============================================================================
 
+# pragma: allowlist secret
 # ATM's Nostr private key (hex format, 64 characters). This signing
 # key IS the credential — LNbits derives the account from it on first
 # contact (issue aiolabs/lnbits#9 alignment).

apps/machine/electron/main.ts

@@ -283,7 +283,6 @@ ipcMain.handle('get-config', () => {
     // LNbits nostr-transport connection (public info only)
     relayUrl: process.env.VITE_RELAY_URL || 'ws://localhost:7777',
     lnbitsServerPubkey: process.env.VITE_LNBITS_SERVER_PUBKEY || '',
-    lnbitsHttpUrl: process.env.VITE_LNBITS_HTTP_URL || 'http://localhost:5000',
     appId: process.env.VITE_APP_ID || '',
 
     // Hardware configuration

apps/machine/electron/preload.ts

@@ -17,8 +17,6 @@ export interface RuntimeConfig {
   relayUrl: string
   /** LNbits nostr-transport server pubkey (hex, 64 chars). */
   lnbitsServerPubkey: string
-  /** LNbits HTTP root — used only to compose the LNURL-withdraw callback URL. */
-  lnbitsHttpUrl: string
   /** Legacy LP fields — retained until 3d removes the LP backend. Optional. */
   lightningPubPubkey?: string
   lightningPubApiUrl?: string

apps/machine/package.json

@@ -28,7 +28,6 @@
     "@bitSpire/lnbits": "workspace:*",
     "@bitSpire/nostr-client": "workspace:*",
     "@bitSpire/state-machine": "workspace:*",
-    "@scure/base": "^1.2.0",
     "@tanstack/vue-table": "^8.21.3",
     "@vueuse/core": "^14.1.0",
     "better-sqlite3": "^11.0.0",

apps/machine/src/services/lightning.ts

@@ -19,7 +19,6 @@ import {
   type MachineIdentity,
 } from '@bitSpire/nostr-client'
 import { LnbitsClient } from '@bitSpire/lnbits'
-import { bech32 } from '@scure/base'
 import { CLINKClient } from '@bitSpire/clink'
 import type { OfferRequest, ManagementRequest, ManagementResponse } from '@bitSpire/clink'
 import type { ATMServices, ATMContext } from '@bitSpire/state-machine'
@@ -50,13 +49,6 @@ interface LightningConfig {
   operatorPubkeys: string[]
   /** LNbits nostr-transport server pubkey (hex, 64 chars). */
   lnbitsServerPubkey: string
-  /**
-   * LNbits HTTP root (e.g. `https://lnbits.example`). Used purely to
-   * compose the LNURL callback URL that customer wallets dereference
-   * to redeem an LNURL-withdraw. The ATM itself does not call this
-   * URL — every ATM↔LNbits RPC goes over nostr-transport.
-   */
-  lnbitsHttpUrl: string
 }
 
 /**
@@ -73,7 +65,6 @@ async function loadLightningConfig(): Promise<LightningConfig> {
     appId: '30270e761f2e30b1737f34ce661df45f521352b408b8ed18fcc09f3f0dec5097', // bitSpire ATM app ID
     operatorPubkeys: [],
     lnbitsServerPubkey: '',
-    lnbitsHttpUrl: 'http://localhost:5000',
   }
 
   if (isElectron && window.electronAPI) {
@@ -91,7 +82,6 @@ async function loadLightningConfig(): Promise<LightningConfig> {
               .filter(Boolean)
           : defaults.operatorPubkeys,
         lnbitsServerPubkey: rc.lnbitsServerPubkey || defaults.lnbitsServerPubkey,
-        lnbitsHttpUrl: rc.lnbitsHttpUrl || defaults.lnbitsHttpUrl,
       }
     } catch (e) {
       console.warn('[Lightning] Failed to get runtime config from Electron:', e)
@@ -105,9 +95,6 @@ async function loadLightningConfig(): Promise<LightningConfig> {
     lnbitsServerPubkey:
       (import.meta.env.VITE_LNBITS_SERVER_PUBKEY as string | undefined) ||
       defaults.lnbitsServerPubkey,
-    lnbitsHttpUrl:
-      (import.meta.env.VITE_LNBITS_HTTP_URL as string | undefined) ||
-      defaults.lnbitsHttpUrl,
     operatorPubkeys: import.meta.env.VITE_OPERATOR_PUBKEYS
       ? (import.meta.env.VITE_OPERATOR_PUBKEYS as string)
           .split(',')
@@ -120,19 +107,6 @@ async function loadLightningConfig(): Promise<LightningConfig> {
 // Config is loaded async now - will be set in initializeLightningServices
 let CONFIG: LightningConfig
 
-/**
- * Encode a callback URL as an LNURL (bech32 with HRP "lnurl", upper-cased
- * per BOLT/LNURL convention). Used for cash-in: customer wallet scans
- * the QR, decodes the URL, GETs it to receive the LNURL-withdraw params.
- *
- * Generous bech32 limit: LNURLs can run long (full origin + path + hash).
- */
-function encodeLnurl(url: string): string {
-  const bytes = new TextEncoder().encode(url)
-  const words = bech32.toWords(bytes)
-  return bech32.encode('lnurl', words, 2000).toUpperCase()
-}
-
 /** Safety timeout in ms (15 minutes) — absolute maximum LNURL session lifetime.
  * Sessions are normally cleaned up by the state machine on idle transition.
  * This is a safety net in case the state machine doesn't clean up properly. */
@@ -677,22 +651,18 @@ function createATMServices(
     /**
      * Generate an LNURL-withdraw for cash-in.
      *
-     * 1. Create the link via LNbits transport (lnurlw_create_link).
-     * 2. Compose the customer-facing callback URL from VITE_LNBITS_HTTP_URL
-     *    plus the link's unique_hash (the transport returns null for
-     *    `lnurl`/`lnurl_url` — those are filled by HTTP views, not the
-     *    create RPC). Bech32-encode it ourselves with HRP "lnurl".
-     * 3. Subscribe to settlement pushes filtered by tag="withdraw" +
+     * 1. Create the link via LNbits transport (lnurlw_create_link). The
+     *    nostr-transport RPC returns `link.lnurl` populated from
+     *    `settings.lnbits_baseurl` on the LNbits side (see
+     *    aiolabs/withdraw#1 / commit e9d911e) — no need to compose
+     *    the callback URL ourselves anymore.
+     * 2. Subscribe to settlement pushes filtered by tag="withdraw" +
      *    link_id; customer wallet redeems via HTTP, LNbits pushes us
      *    over nostr, we trigger dispense.
      */
     generateLnurlWithdraw: async (context: ATMContext): Promise<string> => {
       console.log('[ATM Service] Generating LNURL-withdraw for', context.satsAmount, 'sats')
 
-      if (!CONFIG.lnbitsHttpUrl) {
-        throw new Error('[ATM Service] VITE_LNBITS_HTTP_URL is required for LNbits cash-in')
-      }
-
       try {
         if (context.cashInSessionId) {
           invalidateLnurlSessionBySessionId(context.cashInSessionId)
@@ -707,8 +677,12 @@ function createATMServices(
           is_unique: false,
         })
 
-        const callbackUrl = `${CONFIG.lnbitsHttpUrl.replace(/\/+$/, '')}/withdraw/api/v1/lnurl/${link.unique_hash}`
-        const lnurl = encodeLnurl(callbackUrl)
+        if (!link.lnurl) {
+          throw new Error(
+            '[ATM Service] LNbits returned link.lnurl=null — check LNBITS_BASEURL on the server (aiolabs/withdraw#1)'
+          )
+        }
+        const lnurl = link.lnurl.toUpperCase()
 
         if (context.cashInSessionId) {
           registerLnurlSession(

apps/machine/src/types/electron.d.ts

@@ -6,8 +6,6 @@ export interface RuntimeConfig {
   relayUrl: string
   /** LNbits nostr-transport server pubkey (hex, 64 chars). */
   lnbitsServerPubkey: string
-  /** LNbits HTTP root — used only to compose the LNURL-withdraw callback URL. */
-  lnbitsHttpUrl: string
   /** Legacy LP fields — retained until 3d removes the LP backend. Optional. */
   lightningPubPubkey?: string
   lightningPubApiUrl?: string

deploy/nixos/README.md

@@ -153,7 +153,6 @@ Pull both USB sticks. Power Sintra back on. systemd-boot loads from the eMMC's E
 LNBITS_SERVER_PUBKEY=$(docker logs <lnbits-container> 2>&1 | \
   grep -oP 'Public key \(share this\):\s*\K[a-f0-9]{64}' | tail -1)
 
-LNBITS_HTTP_URL=http://<dev-lan-ip>:5001 \
 RELAY_URL=ws://<dev-lan-ip>:5001/nostrrelay/test \
 LNBITS_SERVER_PUBKEY="$LNBITS_SERVER_PUBKEY" \
 ATM_PRIVATE_KEY=$(openssl rand -hex 32) \
@@ -166,7 +165,6 @@ bash deploy/nixos/provision-atm.sh <sintra-lan-ip> 22
 set -a; source ~/sintra-backup-<date>/.env; set +a
 ATM_PRIVATE_KEY=$VITE_ATM_PRIVATE_KEY \
 LNBITS_SERVER_PUBKEY=$VITE_LNBITS_SERVER_PUBKEY \
-LNBITS_HTTP_URL=$VITE_LNBITS_HTTP_URL \
 RELAY_URL=$VITE_RELAY_URL \
 bash deploy/nixos/provision-atm.sh <sintra-lan-ip> 22
 ```
@@ -204,12 +202,12 @@ Production ATMs on `main` continue to read `main`'s flake (no `?ref=` pin → re
 | Path | Owner | Purpose |
 |------|-------|---------|
 | `/var/lib/bitspire/` | bitspire:bitspire, 0750 | Service data directory |
-| `/var/lib/bitspire/.env` | bitspire:bitspire, 0600 | Runtime config — `VITE_RELAY_URL`, `VITE_LNBITS_SERVER_PUBKEY`, `VITE_LNBITS_HTTP_URL`, `VITE_ATM_PRIVATE_KEY`, … |
+| `/var/lib/bitspire/.env` | bitspire:bitspire, 0600 | Runtime config — `VITE_RELAY_URL`, `VITE_LNBITS_SERVER_PUBKEY`, `VITE_ATM_PRIVATE_KEY`, … |
 | `/var/lib/bitspire/state.db` | bitspire:bitspire | SQLite — cassette inventory, cashbox state, transaction history |
 | `/var/lib/bitspire/logs/` | bitspire:bitspire, 0750 | Service logs (if app writes them) |
 | `/var/lib/bitspire/branding/` | bitspire:bitspire, 0755 | Operator branding override (logo.png + branding.json) — see issue #47 |
 | `/opt/bitspire/` | bitspire:bitspire | Optional override drop for app assets (mostly unused — app comes from `/nix/store`) |
-| `/etc/bitspire/config.env` | root:root | Static config emitted by the NixOS module (RELAY_URL, LNBITS_HTTP_URL — informational; the renderer reads `/var/lib/bitspire/.env` instead) |
+| `/etc/bitspire/config.env` | root:root | Static config emitted by the NixOS module (RELAY_URL, LNBITS_SERVER_PUBKEY — informational; the renderer reads `/var/lib/bitspire/.env` instead) |
 
 ## Common operations
 
@@ -266,7 +264,6 @@ ls -la /dev/serial/by-id/
     enable                    = true;
     relayUrl                  = "wss://relay.aiolabs.dev";              # ATM ↔ LNbits relay
     lnbitsServerPubkey        = "<64-hex>";                              # LNbits transport pubkey
-    lnbitsHttpUrl             = "https://lnbits.aiolabs.dev";            # LNURL callback URL prefix
     appDir                    = "/opt/bitspire";                         # rarely overridden — defaults via flake
     dataDir                   = "/var/lib/bitspire";                     # rarely overridden
     logLevel                  = "info";                                  # error | warn | info | debug

deploy/nixos/bitspire-atm.nix

@@ -1,7 +1,13 @@
 # bitSpire ATM Service Module
 # Manages the ATM Electron application and related services
 
-{ config, lib, pkgs, pkgs-unstable, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  pkgs-unstable,
+  ...
+}:
 
 with lib;
 
@@ -29,17 +35,6 @@ in
       '';
     };
 
-    lnbitsHttpUrl = mkOption {
-      type = types.str;
-      default = "https://lnbits.aiolabs.dev";
-      description = ''
-        LNbits HTTP origin — used solely to compose the LNURL-withdraw
-        callback URL embedded in cash-in QR codes. The ATM itself
-        never calls this URL; every ATM↔LNbits RPC goes over
-        nostr-transport.
-      '';
-    };
-
     appDir = mkOption {
       type = types.path;
       default = "/opt/bitspire";
@@ -53,7 +48,12 @@ in
     };
 
     logLevel = mkOption {
-      type = types.enum [ "error" "warn" "info" "debug" ];
+      type = types.enum [
+        "error"
+        "warn"
+        "info"
+        "debug"
+      ];
       default = "info";
       description = "Logging level for the ATM application";
     };
@@ -73,7 +73,11 @@ in
       };
 
       type = mkOption {
-        type = types.enum [ "id003" "mei" "ccnet" ];
+        type = types.enum [
+          "id003"
+          "mei"
+          "ccnet"
+        ];
         default = "id003";
         description = "Bill validator protocol type";
       };
@@ -93,7 +97,10 @@ in
       };
 
       type = mkOption {
-        type = types.enum [ "puloon" "genmega" ];
+        type = types.enum [
+          "puloon"
+          "genmega"
+        ];
         default = "puloon";
         description = "Bill dispenser type";
       };
@@ -128,7 +135,6 @@ in
       # bitSpire ATM Configuration
       RELAY_URL=${cfg.relayUrl}
       LNBITS_SERVER_PUBKEY=${cfg.lnbitsServerPubkey}
-      LNBITS_HTTP_URL=${cfg.lnbitsHttpUrl}
       LOG_LEVEL=${cfg.logLevel}
       DATA_DIR=${cfg.dataDir}
 
@@ -153,7 +159,10 @@ in
     systemd.services.bitspire = {
       description = "bitSpire ATM Application";
       wantedBy = [ "graphical.target" ];
-      after = [ "graphical.target" "network-online.target" ];
+      after = [
+        "graphical.target"
+        "network-online.target"
+      ];
       wants = [ "network-online.target" ];
 
       serviceConfig = {
@@ -180,7 +189,10 @@ in
         NoNewPrivileges = true;
         ProtectSystem = "strict";
         ProtectHome = true;
-        ReadWritePaths = [ cfg.dataDir "/tmp" ];
+        ReadWritePaths = [
+          cfg.dataDir
+          "/tmp"
+        ];
         PrivateTmp = true;
 
         # Allow device access for hardware
@@ -196,7 +208,6 @@ in
       preStart = ''
         echo "bitSpire starting..."
         echo "Relay: ${cfg.relayUrl}"
-        echo "LNbits HTTP: ${cfg.lnbitsHttpUrl}"
 
         # Check bill validator if enabled
         if [ "${boolToString cfg.billValidator.enable}" = "true" ]; then

docs/architecture-comparison.md

@@ -121,13 +121,12 @@ This document compares the bitSpire architecture — a Nostr-native Lightning AT
 ### Cash-in flow (customer hands ATM cash, gets sats)
 
 1. ATM publishes `lnurlw_create_link` (kind-21000) to LNbits with `{uses: 1, max_withdrawable: <sats>}`
-2. LNbits replies with a `WithdrawLink` (a `unique_hash` plus metadata)
-3. ATM composes the callback URL: `{LNBITS_HTTP_URL}/withdraw/api/v1/lnurl/{unique_hash}` and bech32-encodes it as an LNURL
-4. ATM displays the LNURL as a QR
-5. Customer scans with any LNURL-withdraw-capable wallet, redeems it
-6. LNbits settles the withdrawal via its Lightning backend
-7. LNbits pushes a kind-21000 settlement event to the ATM, filtered by `tag="withdraw"` + `link_id`
-8. ATM marks the session complete (cash already physically accepted earlier in the flow)
+2. LNbits replies with a `WithdrawLink` carrying a `lnurl` field already populated from `settings.lnbits_baseurl` (per aiolabs/withdraw#1 / `e9d911e`)
+3. ATM displays the LNURL as a QR (uppercased per BOLT/LNURL convention)
+4. Customer scans with any LNURL-withdraw-capable wallet, redeems it
+5. LNbits settles the withdrawal via its Lightning backend
+6. LNbits pushes a kind-21000 settlement event to the ATM, filtered by `tag="withdraw"` + `link_id`
+7. ATM marks the session complete (cash already physically accepted earlier in the flow)
 
 ### Characteristics
 

flake.nix

@@ -195,7 +195,6 @@
                   cp ${pkgs.writeText "bitspire-env-default" ''
                     VITE_RELAY_URL=
                     VITE_LNBITS_SERVER_PUBKEY=
-                    VITE_LNBITS_HTTP_URL=
                     VITE_ATM_PRIVATE_KEY=
                     VITE_APP_ID=
                     VITE_OPERATOR_PUBKEYS=

pnpm-lock.yaml

@@ -38,9 +38,6 @@ importers:
       '@bitSpire/state-machine':
         specifier: workspace:*
         version: link:../../packages/state-machine
-      '@scure/base':
-        specifier: ^1.2.0
-        version: 1.2.6
       '@tanstack/vue-table':
         specifier: ^8.21.3
         version: 8.21.3(vue@3.5.27(typescript@5.9.3))