mirror of
https://github.com/aljazceru/btcpayserver.git
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LNURL Payment Method Support (#2897)
* LNURL Payment Method Support * Merge recent Lightning controller related changes * Fix build * Create separate payment settings section for stores * Improve LNURL configuration * Prevent duplicate array entries when merging Swagger JSON * Fix CanSetPaymentMethodLimitsLightning * Fix CanUsePayjoinViaUI * Adapt test for new cancel bolt invoice feature * rebase fixes * Fixes after rebase * Test fixes * Do not turn LNURL on by default, Off-Chain payment criteria should affects both BOLT11 and LNURL, Payment criteria of unset payment method shouldn't be shown * Send better error if payment method not found * Revert "Prevent duplicate array entries when merging Swagger JSON" This reverts commit 5783db9eda17c29908a60fdef2c3ebe130a8b059. * Fix LNUrl doc * Fix some warnings Co-authored-by: Dennis Reimann <mail@dennisreimann.de> Co-authored-by: nicolas.dorier <nicolas.dorier@gmail.com>
This commit is contained in:
Andrew Camilleri
203
BTCPayServer/LNURL/LNURLController.cs
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203
BTCPayServer/LNURL/LNURLController.cs
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.ComponentModel.DataAnnotations;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using BTCPayServer.Client.Models;
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using BTCPayServer.Controllers;
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using BTCPayServer.Data;
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using BTCPayServer.Events;
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using BTCPayServer.Lightning;
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using BTCPayServer.Models.AppViewModels;
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using BTCPayServer.Payments;
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using BTCPayServer.Payments.Lightning;
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using BTCPayServer.Services;
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using BTCPayServer.Services.Apps;
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using BTCPayServer.Services.Invoices;
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using BTCPayServer.Services.Stores;
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using LNURL;
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using Microsoft.AspNetCore.Mvc;
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using NBitcoin;
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using NBitcoin.Crypto;
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using Newtonsoft.Json;
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namespace BTCPayServer
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{
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[Route("~/{cryptoCode}/[controller]/")]
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public class LNURLController : Controller
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{
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private readonly InvoiceRepository _invoiceRepository;
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private readonly EventAggregator _eventAggregator;
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private readonly BTCPayNetworkProvider _btcPayNetworkProvider;
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private readonly LightningLikePaymentHandler _lightningLikePaymentHandler;
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private readonly StoreRepository _storeRepository;
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private readonly AppService _appService;
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private readonly InvoiceController _invoiceController;
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public LNURLController(InvoiceRepository invoiceRepository,
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EventAggregator eventAggregator,
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BTCPayNetworkProvider btcPayNetworkProvider,
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LightningLikePaymentHandler lightningLikePaymentHandler,
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StoreRepository storeRepository,
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AppService appService,
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InvoiceController invoiceController)
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{
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_invoiceRepository = invoiceRepository;
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_eventAggregator = eventAggregator;
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_btcPayNetworkProvider = btcPayNetworkProvider;
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_lightningLikePaymentHandler = lightningLikePaymentHandler;
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_storeRepository = storeRepository;
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_appService = appService;
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_invoiceController = invoiceController;
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}
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[HttpGet("pay/i/{invoiceId}")]
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public async Task<IActionResult> GetLNURLForInvoice(string invoiceId, string cryptoCode,
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[FromQuery] long? amount = null, string comment = null)
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{
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var network = _btcPayNetworkProvider.GetNetwork<BTCPayNetwork>(cryptoCode);
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if (network is null || !network.SupportLightning)
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{
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return NotFound();
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}
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var pmi = new PaymentMethodId(cryptoCode, PaymentTypes.LNURLPay);
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var i = await _invoiceRepository.GetInvoice(invoiceId, true);
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if (i.Status == InvoiceStatusLegacy.New)
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{
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var isTopup = i.IsUnsetTopUp();
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var lnurlSupportedPaymentMethod =
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i.GetSupportedPaymentMethod<LNURLPaySupportedPaymentMethod>(pmi).FirstOrDefault();
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if (lnurlSupportedPaymentMethod is null ||
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(!isTopup && !lnurlSupportedPaymentMethod.EnableForStandardInvoices))
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{
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return NotFound();
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}
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var lightningPaymentMethod = i.GetPaymentMethod(pmi);
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var accounting = lightningPaymentMethod.Calculate();
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var paymentMethodDetails =
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lightningPaymentMethod.GetPaymentMethodDetails() as LNURLPayPaymentMethodDetails;
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if (paymentMethodDetails.LightningSupportedPaymentMethod is null)
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{
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return NotFound();
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}
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var min = new LightMoney(isTopup ? 1m : accounting.Due.ToUnit(MoneyUnit.Satoshi),
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LightMoneyUnit.Satoshi);
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var max = isTopup ? LightMoney.FromUnit(6.12m, LightMoneyUnit.BTC) : min;
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List<string[]> lnurlMetadata = new List<string[]>();
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lnurlMetadata.Add(new[] { "text/plain", i.Id });
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var metadata = JsonConvert.SerializeObject(lnurlMetadata);
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if (amount.HasValue && (amount < min || amount > max))
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{
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return BadRequest(new LNUrlStatusResponse
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{
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Status = "ERROR", Reason = "Amount is out of bounds."
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});
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}
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if (amount.HasValue && string.IsNullOrEmpty(paymentMethodDetails.BOLT11) ||
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paymentMethodDetails.GeneratedBoltAmount != amount)
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{
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var client =
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_lightningLikePaymentHandler.CreateLightningClient(
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paymentMethodDetails.LightningSupportedPaymentMethod, network);
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if (!string.IsNullOrEmpty(paymentMethodDetails.BOLT11))
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{
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try
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{
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await client.CancelInvoice(paymentMethodDetails.InvoiceId);
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}
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catch (Exception)
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{
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//not a fully supported option
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}
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}
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var descriptionHash = new uint256(Hashes.SHA256(Encoding.UTF8.GetBytes(metadata)));
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LightningInvoice invoice;
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try
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{
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invoice = await client.CreateInvoice(new CreateInvoiceParams(amount.Value,
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descriptionHash,
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i.ExpirationTime.ToUniversalTime() - DateTimeOffset.UtcNow));
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if (!BOLT11PaymentRequest.Parse(invoice.BOLT11, network.NBitcoinNetwork)
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.VerifyDescriptionHash(metadata))
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{
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return BadRequest(new LNUrlStatusResponse
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{
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Status = "ERROR",
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Reason = "Lightning node could not generate invoice with a VALID description hash"
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});
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}
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}
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catch (Exception)
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{
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return BadRequest(new LNUrlStatusResponse
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{
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Status = "ERROR",
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Reason = "Lightning node could not generate invoice with description hash"
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});
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}
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paymentMethodDetails.BOLT11 = invoice.BOLT11;
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paymentMethodDetails.InvoiceId = invoice.Id;
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paymentMethodDetails.GeneratedBoltAmount = new LightMoney(amount.Value);
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if (lnurlSupportedPaymentMethod.LUD12Enabled)
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{
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paymentMethodDetails.ProvidedComment = comment;
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}
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lightningPaymentMethod.SetPaymentMethodDetails(paymentMethodDetails);
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await _invoiceRepository.UpdateInvoicePaymentMethod(invoiceId, lightningPaymentMethod);
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_eventAggregator.Publish(new InvoiceNewPaymentDetailsEvent(invoiceId,
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paymentMethodDetails, pmi));
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return Ok(new LNURLPayRequest.LNURLPayRequestCallbackResponse
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{
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Disposable = true, Routes = Array.Empty<string>(), Pr = paymentMethodDetails.BOLT11
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});
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}
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if (amount.HasValue && paymentMethodDetails.GeneratedBoltAmount == amount)
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{
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if (lnurlSupportedPaymentMethod.LUD12Enabled && paymentMethodDetails.ProvidedComment != comment)
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{
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paymentMethodDetails.ProvidedComment = comment;
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lightningPaymentMethod.SetPaymentMethodDetails(paymentMethodDetails);
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await _invoiceRepository.UpdateInvoicePaymentMethod(invoiceId, lightningPaymentMethod);
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}
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return Ok(new LNURLPayRequest.LNURLPayRequestCallbackResponse
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{
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Disposable = true, Routes = Array.Empty<string>(), Pr = paymentMethodDetails.BOLT11
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});
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}
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if (amount is null)
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{
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return Ok(new LNURLPayRequest
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{
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Tag = "payRequest",
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MinSendable = min,
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MaxSendable = max,
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CommentAllowed = lnurlSupportedPaymentMethod.LUD12Enabled ? 2000 : 0,
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Metadata = metadata,
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Callback = new Uri(Request.GetCurrentUrl())
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});
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}
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}
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return BadRequest(new LNUrlStatusResponse
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{
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Status = "ERROR", Reason = "Invoice not in a valid payable state"
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});
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}
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}
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}
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