feat(async-stream): add IGenericApi.Ping()

Author: richardschneider

src/CoreApi/IGenericApi.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
@@ -114,5 +115,49 @@ Task<IEnumerable<PingResult>> PingAsync(
             int count = 10,
             CancellationToken cancel = default(CancellationToken)
             );
+
+#if ASYNCSTREAM
+        /// <summary>
+        ///   Send echo requests to a peer.
+        /// </summary>
+        /// <param name="peer">
+        ///   The peer ID to receive the echo requests.
+        /// </param>
+        /// <param name="count">
+        ///   The number of echo requests to send.  Defaults to 10.
+        /// </param>
+        /// <param name="cancel">
+        ///   Is used to stop the task.  When cancelled, the <see cref="TaskCanceledException"/> is raised.
+        /// </param>
+        /// <returns>
+        ///   An asynchronous stream of <see cref="PingResult"/>.
+        /// </returns>
+        IAsyncEnumerable<PingResult> Ping(
+            MultiHash peer,
+            int count = 10,
+            CancellationToken cancel = default
+            );
+
+        /// <summary>
+        ///   Send echo requests to a peer.
+        /// </summary>
+        /// <param name="address">
+        ///   The address of a peer to receive the echo requests.
+        /// </param>
+        /// <param name="count">
+        ///   The number of echo requests to send.  Defaults to 10.
+        /// </param>
+        /// <param name="cancel">
+        ///   Is used to stop the task.  When cancelled, the <see cref="TaskCanceledException"/> is raised.
+        /// </param>
+        /// <returns>
+        ///   An asynchronous stream of <see cref="PingResult"/>.
+        /// </returns>
+        IAsyncEnumerable<PingResult> Ping(
+            MultiAddress address,
+            int count = 10,
+            CancellationToken cancel = default
+            );
+#endif
     }
 }