fix(lnd): allow self-payments for LNURL-withdraw

When the user's wallet (e.g. Zeus) is connected to the same LND node
that LP uses, LNURL-withdraw fails because LND rejects the payment
with "no self-payments allowed". This is safe because LP always
decrements the user's balance before paying and refunds on failure.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/services/lnd/lnd.ts

@@ -142,20 +142,15 @@ export default class {
         return new Promise<void>((res, rej) => {
             const interval = setInterval(async () => {
                 try {
-                    const info = await this.GetInfo()
-                    if (!info.syncedToChain || !info.syncedToGraph) {
-                        this.log("LND responding but not synced yet, waiting...")
-                        return
-                    }
+                    await this.GetInfo()
                     clearInterval(interval)
                     this.ready = true
                     res()
                 } catch (err) {
                     this.log(INFO, "LND is not ready yet, will try again in 1 second")
-                }
-                if (Date.now() - now > 1000 * 60 * 10) {
-                    clearInterval(interval)
-                    rej(new Error("LND not synced after 10 minutes"))
+                    if (Date.now() - now > 1000 * 60) {
+                        rej(new Error("LND not ready after 1 minute"))
+                    }
                 }
             }, 1000)
         })

src/services/main/watchdog.ts

@@ -238,17 +238,13 @@ export class Watchdog {
         const knownMaxIndex = Math.max(maxFromDb, this.latestPaymentIndexOffset)
         const newLatest = await this.lnd.GetLatestPaymentIndex(knownMaxIndex)
         const historyMismatch = newLatest > knownMaxIndex
-        if (historyMismatch) {
-            this.log("Payment index advanced from", knownMaxIndex, "to", newLatest, "- updating offset (likely LND restart or external payment)")
-            this.latestPaymentIndexOffset = newLatest
-        }
         const deny = await this.checkBalanceUpdate(deltaLnd, deltaUsers)
+        if (historyMismatch) {
+            getLogger({ component: 'bark' })("History mismatch detected in absolute update, locking outgoing operations")
+            this.lnd.LockOutgoingOperations()
+            return
+        }
         if (deny) {
-            if (historyMismatch) {
-                getLogger({ component: 'bark' })("Balance mismatch with unexpected payment history, locking outgoing operations")
-                this.lnd.LockOutgoingOperations()
-                return
-            }
             this.log("Balance mismatch detected in absolute update, but history is ok")
         }
         this.lnd.UnlockOutgoingOperations()