Added GiveEscapeKeyAsync method fro NtumbleBit update

Breeze/src/Breeze.TumbleBit.Client/ITumblerService.cs

@@ -40,5 +40,7 @@ namespace Breeze.TumbleBit.Client
         Task<PuzzleSolver.ServerCommitment[]> SolvePuzzlesAsync(int cycleId, string channelId, PuzzleValue[] puzzles);
 
         Task<SolutionKey[]> FulfillOfferAsync(int cycleId, string channelId, TransactionSignature clientSignature);
+
+        Task GiveEscapeKeyAsync(int cycleId, string channelId, TransactionSignature signature);
     }
 }

Breeze/src/Breeze.TumbleBit.Client/TumblerService.cs

@@ -110,5 +110,11 @@ namespace Breeze.TumbleBit.Client
             SolutionKey[] result = await this.serverAddress.AppendPathSegment($"api/v1/tumblers/0/clientchannels/{cycleId}/{channelId}/offer").PostJsonAsync(clientSignature).ReceiveJson<SolutionKey[]>();
             return result;
         }
+
+        /// <inheritdoc />
+        public async Task GiveEscapeKeyAsync(int cycleId, string channelId, TransactionSignature signature)
+        {
+            await this.serverAddress.AppendPathSegment($"api/v1/tumblers/0/clientchannels/{cycleId}/{channelId}/escape").PostJsonAsync(signature);            
+        }
     }
 }
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