support nut18

.github/workflows/ci.yml

@@ -39,4 +39,27 @@ jobs:
           INCLUDE_SYMBOLS: false
           VERSION_REGEX: ^\s*<PackageVersion>(.*)<\/PackageVersion>\s*$
           TAG_COMMIT: true
+          TAG_FORMAT: DotNut/v*
+      - name: Publish NuGet for nostr
+        if: ${{ github.ref == 'refs/heads/master' }} # Publish only when the push is on master
+        uses: Rebel028/[email protected]
+        with:
+          PROJECT_FILE_PATH: DotNut.Nostr/DotNut.Nostr.csproj
+          NUGET_KEY: ${{secrets.NUGET_KEY}}
+          PACKAGE_NAME: DotNut.Nostr
+          INCLUDE_SYMBOLS: false
+          VERSION_REGEX: ^\s*<PackageVersion>(.*)<\/PackageVersion>\s*$
+          TAG_COMMIT: true
+          TAG_FORMAT: DotNut.Nostr/v*
+      - name: Publish Github Package Registry for nostr
+        if: ${{ github.ref == 'refs/heads/master' }} # Publish only when the push is on master
+        uses: Rebel028/[email protected]
+        with:
+          PROJECT_FILE_PATH: DotNut.Nostr/DotNut.Nostr.csproj
+          NUGET_SOURCE: "https://nuget.pkg.github.com/Kukks"
+          NUGET_KEY: ${{secrets.GH_TOKEN}}
+          PACKAGE_NAME: DotNut.Nostr
+          INCLUDE_SYMBOLS: false
+          VERSION_REGEX: ^\s*<PackageVersion>(.*)<\/PackageVersion>\s*$
+          TAG_COMMIT: true
           TAG_FORMAT: DotNut/v*

DotNut.Nostr/DotNut.Nostr.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+        <Title>DotNut.Nostr</Title>
+        <Authors>Kukks</Authors>
+        <Description>Support Cashu payment requests through Nostr </Description>
+        <Copyright>MIT</Copyright>
+        <PackageProjectUrl>https://github.com/Kukks/DotNut</PackageProjectUrl>
+        <PackageVersion>1.0.0</PackageVersion>
+        <RepositoryUrl>https://github.com/Kukks/DotNut</RepositoryUrl>
+        <RepositoryType>git</RepositoryType>
+        <PackageTags>bitcoin cashu ecash secp256k1 nostr</PackageTags>
+        <PackageLicenseUrl>https://github.com/Kukks/DotNut/blob/master/LICENSE</PackageLicenseUrl>
+
+    </PropertyGroup>
+
+    <ItemGroup>
+
+      <PackageReference Include="NNostr.Client" Version="0.0.53" />
+      <ProjectReference Include="..\DotNut\DotNut.csproj" />
+    </ItemGroup>
+
+</Project>

DotNut.Nostr/NostrNip17PaymentRequestInterfaceHandler.cs

@@ -0,0 +1,43 @@
+using System.Security.Cryptography;
+using System.Text.Json;
+using NBitcoin.Secp256k1;
+using NNostr.Client;
+using NNostr.Client.Protocols;
+
+namespace DotNut.Nostr;
+
+public class NostrNip17PaymentRequestInterfaceHandler : PaymentRequestInterfaceHandler
+{
+    public static void Register()
+    {
+        PaymentRequestTransportInitiator.Handlers.Add(new NostrNip17PaymentRequestInterfaceHandler());
+    }
+
+    public bool CanHandle(PaymentRequest request)
+    {
+        return request.Transports.Any(t => t.Type == "nostr" && t.Tags.Any( t => t.Key == "n" && t.Value == "17"));
+    }
+
+    public async Task SendPayment(PaymentRequest request, PaymentRequestPayload payload,
+        CancellationToken cancellationToken = default)
+    { 
+        var nprofileStr = request.Transports.First(t => t.Type == "nostr" && t.Tags.Any( t => t.Key == "n" && t.Value == "17")).Target;
+        var nprofile = (NIP19.NosteProfileNote) NIP19.FromNIP19Note(nprofileStr);
+        using var  client = new CompositeNostrClient(nprofile.Relays.Select(r => new Uri(r)).ToArray());
+        await client.Connect(cancellationToken);
+        var ephemeralKey = ECPrivKey.Create(RandomNumberGenerator.GetBytes(32));
+        var msg = new NostrEvent()
+        {
+            Kind = 14,
+            Content = JsonSerializer.Serialize(payload),
+            CreatedAt = DateTimeOffset.Now,
+            PublicKey = ephemeralKey.CreateXOnlyPubKey().ToHex(),
+            Tags = new(),
+        };
+        msg.Id = msg.ComputeId();
+
+        var giftWrap = await NIP17.Create(msg, ephemeralKey,ECXOnlyPubKey.Create(Convert.FromHexString(nprofile.PubKey)), null);
+        await client.SendEventsAndWaitUntilReceived(new []{giftWrap}, cancellationToken);
+
+    }
+}

DotNut.Tests/UnitTest1.cs

@@ -367,6 +367,25 @@ public void Nut14Tests_HTLCSecret()
         var rebuiltNut10 = new Nut10Secret(HTLCProofSecret.Key, rebuiltHtlcSecret);
         Assert.Equal(JsonSerializer.Serialize(nut10Secret), JsonSerializer.Serialize(rebuiltNut10));
     }
+
+    [Fact]
+    public void Nut18Tests()
+    {
+        var creqA =
+            "creqApWF0gaNhdGVub3N0cmFheKlucHJvZmlsZTFxeTI4d3VtbjhnaGo3dW45ZDNzaGp0bnl2OWtoMnVld2Q5aHN6OW1od2RlbjV0ZTB3ZmprY2N0ZTljdXJ4dmVuOWVlaHFjdHJ2NWhzenJ0aHdkZW41dGUwZGVoaHh0bnZkYWtxcWd5ZGFxeTdjdXJrNDM5eWtwdGt5c3Y3dWRoZGh1NjhzdWNtMjk1YWtxZWZkZWhrZjBkNDk1Y3d1bmw1YWeBgmFuYjE3YWloYjdhOTAxNzZhYQphdWNzYXRhbYF4Imh0dHBzOi8vbm9mZWVzLnRlc3RudXQuY2FzaHUuc3BhY2U=";
+        var pr = PaymentRequest.Parse(creqA);
+        Assert.Equal("https://nofees.testnut.cashu.space", Assert.Single( pr.Mints));
+        Assert.Equal(10, pr.Amount);
+        Assert.Equal("b7a90176", pr.PaymentId);
+        Assert.Equal("sat", pr.Unit);
+        var t = Assert.Single(pr.Transports);
+        Assert.Equal("nostr", t.Type);
+        Assert.Equal("nprofile1qy28wumn8ghj7un9d3shjtnyv9kh2uewd9hsz9mhwden5te0wfjkccte9curxven9eehqctrv5hszrthwden5te0dehhxtnvdakqqgydaqy7curk439ykptkysv7udhdhu68sucm295akqefdehkf0d495cwunl5", t.Target);
+        Assert.Equal("n",Assert.Single(t.Tags).Key );
+        Assert.Equal("17",Assert.Single(t.Tags).Value );
+        Assert.Equal(creqA, pr.ToString());
+
+    }
 
     internal readonly struct TestCase(in string path, in string keyHex, in string ccHex)
     {

DotNut.sln

@@ -4,6 +4,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DotNut", "DotNut\DotNut.csp
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DotNut.Tests", "DotNut.Tests\DotNut.Tests.csproj", "{0AAAA85C-9FDC-4FD5-9CC2-ED8385B40106}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DotNut.Nostr", "DotNut.Nostr\DotNut.Nostr.csproj", "{EDBCFA42-B7A0-4443-9359-8A44BDA17935}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -18,5 +20,9 @@ Global
 		{0AAAA85C-9FDC-4FD5-9CC2-ED8385B40106}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0AAAA85C-9FDC-4FD5-9CC2-ED8385B40106}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{0AAAA85C-9FDC-4FD5-9CC2-ED8385B40106}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EDBCFA42-B7A0-4443-9359-8A44BDA17935}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EDBCFA42-B7A0-4443-9359-8A44BDA17935}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EDBCFA42-B7A0-4443-9359-8A44BDA17935}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EDBCFA42-B7A0-4443-9359-8A44BDA17935}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal

DotNut.sln.DotSettings.user

@@ -1,12 +1,21 @@
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+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AICBORConverter_00601_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003FUsers_003Fevilk_003FAppData_003FRoaming_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003F1178f88c7f664f88be66f2163788c5392f600_003Fd2_003F856b4d3b_003FICBORConverter_00601_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
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+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AJsonConverterOfT_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003FUsers_003Fevilk_003FAppData_003FRoaming_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FSourcesCache_003Fc247cf3d53f062b5bf983a13ed187d7444d3f29fd6b7ae1a3cdc8cd0f3d213_003FJsonConverterOfT_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ANostrClient_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003FUsers_003Fevilk_003FAppData_003FRoaming_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FSourcesCache_003Fd0b54a6fb9f089bd45a21661e5f515f5109c46c869c360abb2ca21edbf267d60_003FNostrClient_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AObject_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003FUsers_003Fevilk_003FAppData_003FRoaming_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FSourcesCache_003F9a6b1457cbcf17db31a383ba49ef9bcc786cf3ef77146d997eee499b27a46d_003FObject_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AStringAsserts_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003FUsers_003Fevilk_003FAppData_003FRoaming_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FSourcesCache_003F999ae9cc4ab7b7cfbc5080803e994426e97fd9d87c5b1f44544a799bc114_003FStringAsserts_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AThrowHelper_002ESerialization_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003FUsers_003Fevilk_003FAppData_003FRoaming_003FJetBrains_003FRider2024_002E2_003Fresharper_002Dhost_003FSourcesCache_003F60afdfcef9945be6977fa4b76b3d84506e2a2067afb63480aacf49417cfa_003FThrowHelper_002ESerialization_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/Environment/Highlighting/HighlightingSourceSnapshotLocation/@EntryValue">C:\Users\evilk\AppData\Local\JetBrains\Rider2024.2\resharper-host\temp\Rider\vAny\CoverageData\_DotNut.1481064820\Snapshot\snapshot.utdcvr</s:String>
+
 	<s:String x:Key="/Default/Environment/UnitTesting/UnitTestSessionStore/Sessions/=7c67fc42_002Dfa49_002D41c5_002Db4e4_002D876bfc07dd62/@EntryIndexedValue">&lt;SessionState ContinuousTestingMode="0" Name="Test1" xmlns="urn:schemas-jetbrains-com:jetbrains-ut-session"&gt;&#xD;
   &lt;TestAncestor&gt;&#xD;
-    &lt;TestId&gt;xUnit::0AAAA85C-9FDC-4FD5-9CC2-ED8385B40106::net8.0::DotNuts.Tests.UnitTest1&lt;/TestId&gt;&#xD;
+    &lt;TestId&gt;xUnit::0AAAA85C-9FDC-4FD5-9CC2-ED8385B40106::net8.0::DotNut.Tests.UnitTest1.Nut00Tests_TokenSerialization&lt;/TestId&gt;&#xD;
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-  &lt;/And&gt;&#xD;
+  &lt;Project Location="C:\Git\DotNuts\DotNut.Tests" Presentation="&amp;lt;DotNut.Tests&amp;gt;" /&gt;&#xD;
 &lt;/SessionState&gt;</s:String></wpf:ResourceDictionary>

DotNut/ApiModels/ContactInfo.cs

@@ -0,0 +1,9 @@
+using System.Text.Json.Serialization;
+
+namespace DotNut.ApiModels;
+
+public class ContactInfo
+{
+    [JsonPropertyName("method")] public string Method { get; set; }
+    [JsonPropertyName("info")] public string Info { get; set; }
+}

DotNut/ApiModels/GetInfoResponse.cs

@@ -47,10 +47,4 @@ public class GetInfoResponse
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
     [JsonPropertyName("nuts")]
     public Dictionary<string, JsonDocument>? Nuts { get; set; }
-}
-
-public class ContactInfo
-{
-    [JsonPropertyName("method")] public string Method { get; set; }
-    [JsonPropertyName("info")] public string Info { get; set; }
 }

DotNut/DotNut.csproj

@@ -19,7 +19,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="NBitcoin.Secp256k1" Version="3.1.5" />
+      <PackageReference Include="NBitcoin.Secp256k1" Version="3.1.6" />
         <PackageReference Include="NBip32Fast" Version="1.0.5" />
         <PackageReference Include="PeterO.Cbor" Version="4.5.5" />
     </ItemGroup>

DotNut/Encoding/CashuTokenHelper.cs

@@ -1,9 +1,4 @@
-using System.Text;
-using System.Text.Json;
-using NBitcoin.Secp256k1;
-using PeterO.Cbor;
-
-namespace DotNut;
+namespace DotNut;
 
 public static class CashuTokenHelper
 {
@@ -64,127 +59,4 @@ public static CashuToken Decode(string token, out string? version)
         token = token.Substring(1);
         return encoder.Decode(token);
     }
-}
-
-public interface ICashuTokenEncoder
-{
-    string Encode(CashuToken token);
-    CashuToken Decode(string token);
-}
-
-public class CashuTokenV3Encoder : ICashuTokenEncoder
-{
-    public string Encode(CashuToken token)
-    {
-        var json = JsonSerializer.Serialize(token);
-        return Base64UrlSafe.Encode(Encoding.UTF8.GetBytes(json));
-    }
-
-    public CashuToken Decode(string token)
-    {
-        var json = Encoding.UTF8.GetString(Base64UrlSafe.Decode(token));
-        return JsonSerializer.Deserialize<CashuToken>(json)!;
-    }
-}
-
-public class CashuTokenV4Encoder : ICashuTokenEncoder, ICBORToFromConverter<CashuToken>
-{
-    public string Encode(CashuToken token)
-    {
-        var obj = ToCBORObject(token);
-        return Base64UrlSafe.Encode(obj.EncodeToBytes());
-    }
-
-    public CashuToken Decode(string token)
-    {
-        var obj = CBORObject.DecodeFromBytes(Base64UrlSafe.Decode(token));
-        return FromCBORObject(obj);
-    }
-
-    public CBORObject ToCBORObject(CashuToken token)
-    {
-        //ensure that all token mints are the same
-        var mints = token.Tokens.Select(token1 => token1.Mint).ToArray();
-        if (mints.Distinct().Count() != 1)
-            throw new FormatException("All proofs must have the same mint in v4 tokens");
-        var proofSets = CBORObject.NewArray();
-        foreach (var proofSet in token.Tokens.SelectMany(token1 => token1.Proofs).GroupBy(proof => proof.Id))
-        {
-            var proofSetItem = CBORObject.NewOrderedMap();
-            proofSetItem.Add("i", Convert.FromHexString(proofSet.Key.ToString()));
-            var proofSetItemArray = CBORObject.NewArray();
-            foreach (var proof in proofSet)
-            {
-                var proofItem = CBORObject.NewOrderedMap()
-                    .Add("a", proof.Amount)
-                    .Add("s", Encoding.UTF8.GetString(proof.Secret.GetBytes()))
-                    .Add("c", proof.C.Key.ToBytes());
-                if (proof.DLEQ is not null)
-                {
-                    proofItem.Add("d", CBORObject
-                        .NewOrderedMap()
-                        .Add("e", proof.DLEQ.E.Key.ToBytes())
-                        .Add("s", proof.DLEQ.S.Key.ToBytes())
-                        .Add("r", proof.DLEQ.R.Key.ToBytes()));
-                }
-
-                if (proof.Witness is not null)
-                {
-                    proofItem.Add("w", proof.Witness);
-                }
-
-                proofSetItemArray.Add(proofItem);
-            }
-
-            proofSetItem.Add("p", proofSetItemArray);
-            proofSets.Add(proofSetItem);
-        }
-
-        var cbor = CBORObject.NewOrderedMap();
-
-
-        if (token.Memo is not null)
-            cbor.Add("d", token.Memo);
-        cbor.Add("t", proofSets)
-            .Add("m", mints.First())
-            .Add("u", token.Unit!);
-        return cbor;
-    }
-
-    public CashuToken FromCBORObject(CBORObject obj)
-    {
-        return new CashuToken
-        {
-            Unit = obj["u"].AsString(),
-            Memo = obj.GetOrDefault("d", null)?.AsString(),
-            Tokens =
-            [
-                new CashuToken.Token()
-                {
-                    Mint = obj["m"].AsString(),
-                    Proofs = obj["t"].Values.SelectMany(proofSet =>
-                    {
-                        var id = new KeysetId(Convert.ToHexString(proofSet["i"].GetByteString()).ToLowerInvariant());
-
-                        return proofSet["p"].Values.Select(proof => new Proof()
-                        {
-                            Amount = proof["a"].AsInt32(),
-                            Secret = JsonSerializer.Deserialize<ISecret>(proof["s"].ToJSONString())!,
-                            C = ECPubKey.Create(proof["c"].GetByteString()),
-                            Witness = proof.GetOrDefault("w", null)?.AsString(),
-                            DLEQ = proof.GetOrDefault("d", null) is { } cborDLEQ
-                                ? new DLEQProof
-                                {
-                                    E = ECPrivKey.Create(cborDLEQ["e"].GetByteString()),
-                                    S = ECPrivKey.Create(cborDLEQ["s"].GetByteString()),
-                                    R = ECPrivKey.Create(cborDLEQ["r"].GetByteString())
-                                }
-                                : null,
-                            Id = id
-                        });
-                    }).ToList()
-                }
-            ]
-        };
-    }
 }

DotNut/Encoding/CashuTokenV3Encoder.cs

@@ -0,0 +1,19 @@
+using System.Text;
+using System.Text.Json;
+
+namespace DotNut;
+
+public class CashuTokenV3Encoder : ICashuTokenEncoder
+{
+    public string Encode(CashuToken token)
+    {
+        var json = JsonSerializer.Serialize(token);
+        return Base64UrlSafe.Encode(Encoding.UTF8.GetBytes(json));
+    }
+
+    public CashuToken Decode(string token)
+    {
+        var json = Encoding.UTF8.GetString(Base64UrlSafe.Decode(token));
+        return JsonSerializer.Deserialize<CashuToken>(json)!;
+    }
+}