Fixed transient exception on missing balance changes in TransactionBa…

CHANGELOG.md

@@ -1,11 +1,11 @@
 ## 1.3.0
 Release Date: _unreleased_
 
-- added support for new transaction types (flash transactions) that are gonna occur on protocol updates.
-- moved vm_type to `package_code_history` table from package in `entity` table.
+- Added support for new transaction types (flash transactions) that are gonna occur on protocol updates.
+- Moved vm_type to `package_code_history` table from package in `entity` table.
 - `vm_type`, `code_hash_hex` and `code_hex` are returned as collection (it's allowed after protocol update to have multiple codes per package). Previous properties will return empty strings to keep contract compatibility.
-- created new `package_blueprint_aggregate_history` table which will hold pointers to all package blueprints.
-- created new `package_code_aggregate_history` table which will hold pointers to all package codes.
+- Created new `package_blueprint_aggregate_history` table which will hold pointers to all package blueprints.
+- Created new `package_code_aggregate_history` table which will hold pointers to all package codes. 
 
 ## 1.2.4
 Release Date: 4.01.2024

src/RadixDlt.NetworkGateway.PostgresIntegration/Services/TransactionBalanceChangesService.cs

@@ -147,7 +147,12 @@ await Parallel.ForEachAsync(transactions, options, async (transaction, cancellat
                     throw balanceChangesResult.FailureResponse.OriginalApiException;
                 }
 
-                var balanceChanges = balanceChangesResult.SuccessResponse.CommittedTransactionOutcomes.Single();
+                var balanceChanges = balanceChangesResult.SuccessResponse.CommittedTransactionOutcomes.FirstOrDefault();
+
+                if (balanceChanges == null)
+                {
+                    return;
+                }
 
                 await _observers.ForEachAsync(x => x.PostHandleOutcomeRequest(transaction.StateVersion, selectedNode.Name));