save progress

src/__Libraries/StellaOps.Eventing/Signing/IEventSigner.cs

@@ -16,6 +16,14 @@ public interface IEventSigner
     /// <returns>The DSSE signature string.</returns>
     string Sign(TimelineEvent timelineEvent);
 
+    /// <summary>
+    /// Signs binary content asynchronously and returns the signature.
+    /// </summary>
+    /// <param name="content">The content to sign.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The signature string.</returns>
+    Task<string> SignAsync(byte[] content, CancellationToken cancellationToken = default);
+
     /// <summary>
     /// Verifies a timeline event signature.
     /// </summary>