initial commit

Plugins/BTCPayServer.Plugins.NFC/NFCController.cs

@@ -0,0 +1,99 @@
+using System;
+using System.Net.Http;
+using System.Threading.Tasks;
+using BTCPayServer.Abstractions.Constants;
+using BTCPayServer.Client;
+using LNURL;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using NBitcoin;
+
+namespace BTCPayServer.Plugins.NFC
+{
+    [Route("plugins/NFC")]
+    public class NFCController : Controller
+    {
+        private readonly IHttpClientFactory _httpClientFactory;
+
+        public NFCController(IHttpClientFactory httpClientFactory)
+        {
+            _httpClientFactory = httpClientFactory;
+        }
+
+        public class SubmitRequest
+        {
+            public string Lnurl { get; set; }
+            public string Destination { get; set; }
+        }
+
+        [AllowAnonymous]
+        public async Task<IActionResult> SubmitLNURLWithdrawForInvoice([FromBody] SubmitRequest request)
+        {
+            Uri uri;
+            string tag;
+            try
+            {
+                uri = LNURL.LNURL.Parse(request.Lnurl, out tag);
+                if (uri is null)
+                {
+                    return BadRequest("lnurl was malformed");
+                }
+            }
+            catch (Exception e)
+            {
+                
+                return BadRequest(e.Message);
+            }
+           
+
+            if (!string.IsNullOrEmpty(tag) && !tag.Equals("withdrawRequest"))
+            {
+                return BadRequest("lnurl was not lnurl-withdraw");
+            }
+
+            var httpClient = _httpClientFactory.CreateClient(uri.IsOnion()
+                ? "LightningLikePayoutHandlerOnionNamedClient"
+                : "LightningLikePayoutHandlerClearnetNamedClient");
+            var info = (await
+                LNURL.LNURL.FetchInformation(uri, "withdrawRequest", httpClient)) as LNURLWithdrawRequest;
+            if (info is null)
+            {
+                return BadRequest("Could not fetch info from lnurl-withdraw ");
+            }
+
+            httpClient = _httpClientFactory.CreateClient(info.Callback.IsOnion()
+                ? "LightningLikePayoutHandlerOnionNamedClient"
+                : "LightningLikePayoutHandlerClearnetNamedClient");
+
+            try
+            {
+                var destinationuri = LNURL.LNURL.Parse(request.Destination, out string _);
+
+                var destinfo = (await
+                    LNURL.LNURL.FetchInformation(destinationuri, "payRequest", httpClient)) as LNURLPayRequest;
+
+                if (destinfo is null)
+                {
+                    return BadRequest("Could not fetch bolt11 invoice to pay to.");
+                }
+
+                httpClient = _httpClientFactory.CreateClient(destinfo.Callback.IsOnion()
+                    ? "LightningLikePayoutHandlerOnionNamedClient"
+                    : "LightningLikePayoutHandlerClearnetNamedClient");
+                var destCallback = await destinfo.SendRequest(destinfo.MinSendable, Network.Main, httpClient);
+                request.Destination = destCallback.Pr;
+            }
+            catch (Exception e)
+            {
+            }
+
+            var result = await info.SendRequest(request.Destination, httpClient);
+            if (result.Status.Equals("ok", StringComparison.InvariantCultureIgnoreCase))
+            {
+                return Ok(result.Reason);
+            }
+
+            return BadRequest(result.Reason);
+        }
+    }
+}