1 files changed, 43 insertions, 0 deletions
diff --git a/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/INostrEncryptionVersion.cs b/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/INostrEncryptionVersion.cs
new file mode 100644
index 0000000..3a26466
--- /dev/null
+++ b/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/INostrEncryptionVersion.cs
@@ -0,0 +1,43 @@
+// Copyright (C) 2024 Vaughn Nugent
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+namespace VNLib.Utils.Cryptography.Noscrypt
+{
+    /// <summary>
+    /// Represents a message encryption version used by the Nostr protocol
+    /// </summary>
+    public interface INostrEncryptionVersion
+    {
+        /// <summary>
+        /// The noscrypt compatible encryption version
+        /// </summary>
+        internal uint Version { get; }
+
+        /// <summary>
+        /// Calculates the required payload buffer size for the specified data size
+        /// </summary>
+        /// <param name="dataSize">The size of the input data</param>
+        /// <returns>The estimated size of the buffer required to complete the opeation</returns>
+        internal int GetPayloadBufferSize(int dataSize);
+
+        /// <summary>
+        /// Calculates the required message buffer size for the specified data size
+        /// </summary>
+        /// <param name="dataSize">Plain text data size</param>
+        /// <returns>The estimated size of the buffer required to complete the opeation</returns>
+        internal int GetMessageBufferSize(int dataSize);
+    }
+
+}