max sendable lnurl

src/services/lnd/index.ts

@@ -29,6 +29,7 @@ export interface LightningHandler {
     PayAddress(address: string, amount: number, satPerVByte: number, label?: string): Promise<SendCoinsResponse>
     OpenChannel(destination: string, closeAddress: string, fundingAmount: number, pushSats: number): Promise<string>
     SetMockInvoiceAsPaid(invoice: string, amount: number): Promise<void>
+    ChannelBalance(): Promise<{ local: number, remote: number }>
 }
 
 export default (settings: LndSettings, addressPaidCb: AddressPaidCb, invoicePaidCb: InvoicePaidCb): LightningHandler => {

src/services/lnd/lnd.ts

@@ -7,7 +7,7 @@ import * as Types from '../../../proto/autogenerated/ts/types.js'
 import { LightningClient } from '../../../proto/lnd/lightning.client.js'
 import { InvoicesClient } from '../../../proto/lnd/invoices.client.js'
 import { RouterClient } from '../../../proto/lnd/router.client.js'
-import { GetInfoResponse, AddressType, NewAddressResponse, AddInvoiceResponse, Invoice_InvoiceState, PayReq, Payment_PaymentStatus, Payment, PaymentFailureReason, SendCoinsResponse, EstimateFeeResponse } from '../../../proto/lnd/lightning.js'
+import { GetInfoResponse, AddressType, NewAddressResponse, AddInvoiceResponse, Invoice_InvoiceState, PayReq, Payment_PaymentStatus, Payment, PaymentFailureReason, SendCoinsResponse, EstimateFeeResponse, ChannelBalanceResponse } from '../../../proto/lnd/lightning.js'
 import { OpenChannelReq } from './openChannelReq.js';
 import { AddInvoiceReq } from './addInvoiceReq.js';
 import { PayInvoiceReq } from './payInvoiceReq.js';
@@ -187,12 +187,15 @@ export default class {
         return Math.max(0, Math.floor(amount * (1 - this.settings.feeRateLimit) - this.settings.feeFixedLimit))
     }
 
+    async ChannelBalance(): Promise<{ local: number, remote: number }> {
+        const res = await this.lightning.channelBalance({})
+        const r = res.response
+        return { local: r.localBalance ? Number(r.localBalance.sat) : 0, remote: r.remoteBalance ? Number(r.remoteBalance.sat) : 0 }
+    }
     async PayInvoice(invoice: string, amount: number, feeLimit: number): Promise<PaidInvoice> {
         await this.Health()
-        console.log(await this.lightning.channelBalance({}))
         const abortController = new AbortController()
         const req = PayInvoiceReq(invoice, amount, feeLimit)
-        console.log("sending payment:", req)
         const stream = this.router.sendPaymentV2(req, { abort: abortController.signal })
         return new Promise((res, rej) => {
             stream.responses.onError(error => {

src/services/lnd/mock.ts

@@ -95,6 +95,10 @@ export default class {
         return { feeSat: 1, paymentPreimage: "all_good", valueSat: amt || amount }
     }
 
+    async ChannelBalance(): Promise<{ local: number, remote: number }> {
+        return { local: 100 * 1000 * 1000, remote: 100 * 1000 * 1000 }
+    }
+
     async EstimateChainFees(address: string, amount: number, targetConf: number): Promise<EstimateFeeResponse> {
         throw new Error("EstimateChainFees disabled in mock mode")
     }

src/services/main/paymentManager.ts

@@ -235,10 +235,11 @@ export default class {
     async GetLnurlPayInfoFromUser(userId: string, linkedApplication: Application, baseUrl?: string): Promise<Types.LnurlPayInfoResponse> {
         const payK1 = await this.storage.paymentStorage.AddUserEphemeralKey(userId, 'pay', linkedApplication)
         const url = baseUrl ? baseUrl : `${this.settings.serviceUrl}/api/guest/lnurl_pay/handle`
+        const { remote } = await this.lnd.ChannelBalance()
         return {
             tag: 'payRequest',
             callback: `${url}?k1=${payK1.key}`,
-            maxSendable: this.GetMaxPayableInvoice(payK1.user.balance_sats, true) * 1000,
+            maxSendable: remote * 1000,
             minSendable: 10000,
             metadata: defaultLnurlPayMetadata
         }
@@ -246,10 +247,11 @@ export default class {
 
     async GetLnurlPayInfo(payInfoK1: string): Promise<Types.LnurlPayInfoResponse> {
         const key = await this.storage.paymentStorage.UseUserEphemeralKey(payInfoK1, 'pay', true)
+        const { remote } = await this.lnd.ChannelBalance()
         return {
             tag: 'payRequest',
             callback: `${this.settings.serviceUrl}/api/guest/lnurl_pay/handle?k1=${payInfoK1}`,
-            maxSendable: this.GetMaxPayableInvoice(key.user.balance_sats, true) * 1000,
+            maxSendable: remote * 1000,
             minSendable: 10000,
             metadata: defaultLnurlPayMetadata
         }