Added journal reversals.

wolverine/a-frame-architecture/FinancialApi.Application/ReverseJournalHandler.cs

@@ -19,21 +19,16 @@ public static class ReverseJournalHandler
     public static async Task<ReversalData?> LoadAsync(ReverseJournalCommand cmd, IReversalQuery query)
     {
         var data = await query.GetReversalDataAsync(cmd.OriginalJournalId);
-        if (data == null)
+        return data ?? throw new InvalidOperationException($"Journal Entry {cmd.OriginalJournalId} does not exist");
-        {
-            throw new InvalidOperationException($"Journal Entry {cmd.OriginalJournalId} does not exist");
-        }
-
-        return data;
     }
 
     public static (
-        IStorageAction<JournalEntry> ReversalWrite,
+        IStorageAction<JournalEntry> JournalWrite,
-        IStorageAction<Account>[] AccountWrites,
+        UnitOfWork<Account> AccountWrites,
         JournalReversedEvent Event) Handle(ReverseJournalCommand cmd, ReversalData data)
     {
         var reversalJournal =
-            BalancedJournal.CreateReversal(data.OriginalJournalEntry, cmd.Reason, DateTimeOffset.UtcNow);
+            BalancedJournal.CreateReversal(data.OriginalJournalEntry, $"Reversal: {cmd.Reason}", DateTimeOffset.UtcNow);
         var accountState = data.AffectedAccounts.ToDictionary(a => a.Id);
 
         reversalJournal.Entry.Lines.ForEach(l =>
@@ -41,11 +36,14 @@ public static class ReverseJournalHandler
             var currentAccount = accountState[l.AccountId];
             accountState[l.AccountId] = currentAccount.ApplyPosting(l.Amount, l.Type);
         });
-
+        var accountUow = new UnitOfWork<Account>();
-        var accountWrites = accountState.Values.Select(a => (IStorageAction<Account>)Storage.Update(a)).ToArray();
+        foreach (var account in accountState.Values)
+        {
+            accountUow.Update(account);
+        }
         return (
             Storage.Insert(reversalJournal.Entry),
-            accountWrites,
+            accountUow,
             new JournalReversedEvent(cmd.OriginalJournalId, reversalJournal.Entry.Id)
         );
     }

wolverine/a-frame-architecture/FinancialApi/DomainExceptionHandler.cs

@@ -10,23 +10,23 @@ public class DomainExceptionHandler : IExceptionHandler
         Exception exception, 
         CancellationToken cancellationToken)
     {
-        // Only intercept our specific domain/validation exceptions
+        if (exception is not (InvalidOperationException or ArgumentException))
-        if (exception is InvalidOperationException or ArgumentException)
         {
-            var problemDetails = new ProblemDetails
+            return false;
-            {
-                Status = StatusCodes.Status400BadRequest,
-                Title = "Domain Validation Error",
-                Detail = exception.Message,
-                Type = "https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.1"
-            };
-
-            httpContext.Response.StatusCode = problemDetails.Status.Value;
-            await httpContext.Response.WriteAsJsonAsync(problemDetails, cancellationToken);
-            
-            return true;
         }
 
-        return false; 
+        var problemDetails = new ProblemDetails
+        {
+            Status = StatusCodes.Status400BadRequest,
+            Title = "Domain Validation Error",
+            Detail = exception.Message,
+            Type = "https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.1"
+        };
+
+        httpContext.Response.StatusCode = problemDetails.Status.Value;
+        await httpContext.Response.WriteAsJsonAsync(problemDetails, cancellationToken);
+            
+        return true;
+
     }
 }

wolverine/a-frame-architecture/FinancialApi/FinancialApi.http

@@ -22,7 +22,7 @@ Content-Type: application/json
 {
   "sourceAccountId": 1,
   "destinationAccountId": 2,
-  "amount": 3000.00
+  "amount": 1000.00
 }
 
 ### Reverse a Journal Entry
@@ -31,6 +31,6 @@ POST {{FinancialApi_HostAddress}}/journal/reverse
 Content-Type: application/json
 
 {
-  "originalJournalId": "AD4FC011-9979-4364-A0D4-2CCD922ECB5E",
+  "originalJournalId": "3E829F92-E2FA-4FCD-9B7B-E1B5AAC96FF1",
-  "reason": "Incorrect Account"
+  "reason": "Incorrect Account Fee"
 }

wolverine/a-frame-architecture/FinancialApi/Program.cs

@@ -58,20 +58,20 @@ app.UseHttpsRedirection();
 
 app.MapPost("/accounts/apply-fee", async (ApplyFeeCommand cmd, IMessageBus bus) =>
 {
-    await bus.InvokeAsync(cmd); 
+    await bus.InvokeAsync(cmd);
     return Results.Accepted();
 });
 
 app.MapPost("/accounts/transfer", async (TransferFundsCommand cmd, IMessageBus bus) =>
 {
-    await bus.InvokeAsync(cmd); 
+    await bus.InvokeAsync(cmd);
     return Results.Accepted();
 });
 
 app.MapPost("/journal/reverse", async (ReverseJournalCommand cmd, IMessageBus bus) =>
 {
-    await bus.InvokeAsync(cmd); 
+    await bus.InvokeAsync(cmd);
     return Results.Accepted();
 });
 
-app.Run();
+app.Run();