Koto.Messaging.Wolverine.Postgres 0.4.0

.NET 10.0

dotnet add package Koto.Messaging.Wolverine.Postgres --version 0.4.0

NuGet\Install-Package Koto.Messaging.Wolverine.Postgres -Version 0.4.0

This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.

<PackageReference Include="Koto.Messaging.Wolverine.Postgres" Version="0.4.0" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="Koto.Messaging.Wolverine.Postgres" Version="0.4.0" />
                    

                            Directory.Packages.props

<PackageReference Include="Koto.Messaging.Wolverine.Postgres" />
                    

                            Project file

For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.

paket add Koto.Messaging.Wolverine.Postgres --version 0.4.0

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: Koto.Messaging.Wolverine.Postgres, 0.4.0"

#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.

#:package Koto.Messaging.Wolverine.Postgres@0.4.0

#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package.

#addin nuget:?package=Koto.Messaging.Wolverine.Postgres&version=0.4.0
                    

                            Install as a Cake Addin

#tool nuget:?package=Koto.Messaging.Wolverine.Postgres&version=0.4.0
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Koto.Messaging.Wolverine.Postgres

Durable PostgreSQL-backed IProcessedMessageStore for Koto.Messaging.Wolverine: consumer idempotency that survives service restarts.

Why

IntegrationEventConsumerBase<TEvent> deduplicates events via IProcessedMessageStore. The default in-memory store loses its state on restart — with Kafka's at-least-once delivery that means real duplicate processing in production. This package stores processed message ids in PostgreSQL instead.

Usage

services.AddKotoWolverine();
services.AddPostgresProcessedMessageStore(
    builder.Configuration.GetConnectionString("db")!);

Optional configuration:

services.AddPostgresProcessedMessageStore(connectionString, o =>
{
    o.Schema = "koto";                          // default
    o.Table = "processed_messages";             // default
    o.AutoCreateSchema = true;                  // default; disable with external migrations
    o.CleanupInterval = TimeSpan.FromHours(1);  // default
});

The deduplication window comes from KotoWolverineOptions.IdempotencyWindow (default 24 h) — the same option the in-memory store uses.
Schema/table/index are created on first use (CREATE ... IF NOT EXISTS); set AutoCreateSchema = false to manage them with your migrations:

CREATE SCHEMA IF NOT EXISTS koto;
CREATE TABLE IF NOT EXISTS koto.processed_messages (
    message_id   uuid PRIMARY KEY,
    processed_at timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS ix_processed_messages_processed_at
    ON koto.processed_messages (processed_at);

A background service deletes entries older than the idempotency window every CleanupInterval.
Call order relative to AddKotoWolverine does not matter.

Semantics

Delivery stays at-least-once: the store marks an event as processed after your ConsumeAsync completes, outside a shared transaction. A crash in between redelivers the event. For strict business-level deduplication use a deterministic operation id with a unique constraint in the consumer's own storage (see the Koto ledger patterns).

License

MIT

Durable outbox defaults

builder.Host.UseWolverine(opts =>
{
    opts.UseKotoKafka(kafka, typeof(SomeHandler).Assembly)
        .PublishIntegrationEvents(typeof(OrderPlacedV1).Assembly)
        .UseKotoDurableOutbox(connectionString); // envelopes in Postgres + EF transactions + domain event scraping
});

Product	Compatible and additional computed target framework versions.
.NET	net10.0 is compatible. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed.

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

net10.0
- Koto.Domain (>= 0.4.0)
- Koto.Messaging.Wolverine (>= 0.4.0)
- Microsoft.Extensions.DependencyInjection.Abstractions (>= 10.0.7)
- Microsoft.Extensions.Hosting.Abstractions (>= 10.0.7)
- Microsoft.Extensions.Logging.Abstractions (>= 10.0.7)
- Microsoft.Extensions.Options (>= 10.0.7)
- Npgsql (>= 10.0.3)
- WolverineFx.EntityFrameworkCore (>= 5.39.0)
- WolverineFx.Postgresql (>= 5.39.0)

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last Updated
0.4.0	93	7/21/2026
0.3.0-preview.15	43	7/21/2026
0.3.0-preview.14	51	7/21/2026
0.3.0-preview.13	49	7/21/2026
0.3.0-preview.12	43	7/21/2026
0.3.0-preview.11	48	7/21/2026
0.3.0-preview.10	43	7/21/2026
0.3.0-preview.9	53	7/21/2026
0.3.0-preview.8	56	7/21/2026
0.3.0-preview.7	46	7/21/2026
0.3.0-preview.6	44	7/20/2026
0.3.0-preview.5	50	7/19/2026