Stratara.Contracts 3.1.0

Prefix Reserved

There is a newer version of this package available.
See the version list below for details.

dotnet add package Stratara.Contracts --version 3.1.0

NuGet\Install-Package Stratara.Contracts -Version 3.1.0

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="Stratara.Contracts" Version="3.1.0" />

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

<PackageVersion Include="Stratara.Contracts" Version="3.1.0" />
                    

                            Directory.Packages.props

<PackageReference Include="Stratara.Contracts" />
                    

                            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 Stratara.Contracts --version 3.1.0

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

#r "nuget: Stratara.Contracts, 3.1.0"

#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 Stratara.Contracts@3.1.0

#: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=Stratara.Contracts&version=3.1.0
                    

                            Install as a Cake Addin

#tool nuget:?package=Stratara.Contracts&version=3.1.0
                    

                            Install as a Cake Tool

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

Stratara.Contracts

License: FSL-1.1-MIT (Functional Source License — source-available; converts to MIT after 2 years). Not OSI-approved OSS.

Wire-level POCO contracts shared by every Stratara package. Pure data records — no runtime, no DI, no infrastructure deps. Safe to reference from any layer.

Messages/EventMessage, EventBundle, CommandEnvelope — the cross-process envelope shapes that messaging adapters (Stratara.Outbox.RabbitMQ etc.) serialise on and off the bus.
Requests/PagedRequest — shared pagination + sort record used by query handlers across the family.
Session/SessionContext — public data shape for actor/subject identity, correlation, causation, and connection routing. The corresponding service abstractions live in Stratara.Sessions.

Quick reference

// Build a CommandEnvelope outside the framework (rare, but supported)
var envelope = new CommandEnvelope(
    Id: Guid.CreateVersion7(),
    CommandJson: commandJson,
    CommandTypeName: typeof(MyCommand).AssemblyQualifiedName!,
    SessionContextJson: sessionContextJson);

Dependencies

None. Contracts is the lowest tier in the Stratara dependency graph.

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
- No dependencies.

NuGet packages (9)

Showing the top 5 NuGet packages that depend on Stratara.Contracts:

Package	Downloads
Stratara.Abstractions Contract interfaces and POCO records for the Stratara CQRS / Event Sourcing framework — Mediator, EventSourcing, Persistence, Outbox, Messaging, Session, Security, Authorization. Library-safe, no EF Core or message-bus runtime.	13.1K
Stratara.Sessions ASP.NET Core middleware and provider for Stratara's Actor/Subject session model. Reads tenant and user from JWT claims (or X-Tenant-Id / X-Client-Id headers) and populates the ambient ISessionContextProvider for every request.	11.6K
Stratara.Shared Umbrella package for the Stratara framework — source-generated logger extensions for command flows, domain-event helpers, merge primitives, and the Tier-A/B abstractions surface re-exported as one transitive bundle.	8.9K
Stratara.Projections Projection runtime for the Stratara event-sourced stack — projection-handler discovery, change-set creation, update application, and projection manager. Sits between read-model repositories and the event-bundle dispatcher.	5.1K
Stratara.Outbox.RabbitMQ Outbox-pattern command and event dispatch for the Stratara event-sourced stack — RabbitMQ IMessageBus implementation, retry worker, mediator command worker, and Redis-coordinated projection-replay state. Azure Service Bus support ships as the sibling Stratara.Outbox.AzureServiceBus package.	4.6K

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last Updated
4.2.0	26	9/18/2026
4.1.1	260	9/16/2026
4.1.0	211	9/16/2026
4.0.4	819	9/14/2026
4.0.3	403	9/3/2026
4.0.2	813	9/3/2026
4.0.1	384	9/2/2026
4.0.0	819	8/31/2026
4.0.0-preview.1	160	8/31/2026
3.4.0	387	8/28/2026
3.3.0	544	8/25/2026
3.2.3	375	8/22/2026
3.2.2	925	8/14/2026
3.2.1	927	8/2/2026
3.2.0	353	7/18/2026
3.1.7	594	7/1/2026
3.1.6	760	6/22/2026
3.1.5	335	6/22/2026
3.1.4	2,206	6/15/2026
3.1.0	312	5/30/2026

**Breaking release.** The `IKeyStore` and `ISecureBlobEncryptor` contracts changed shape, a new
dependency-light `Stratara.Security` package now owns the production key store and envelope
encryption, and a new vendor-neutral `Stratara.Validation` package adds request validation as a
`Stratara.Mediator` pipeline behavior. Consumers must recompile and adapt call sites; data
encrypted under the previous HKDF-style key model is **not** binary-compatible and needs a
re-encrypt pass on its own schedule.

### Added

- **`Stratara.Validation` — vendor-neutral request validation.** A new package providing a
mediator pipeline behavior that runs `IValidator<T>` implementations before the handler and
throws an aggregated `StrataraValidationException` on failure. Register with
`AddStrataraValidation()` (outermost behavior) and `AddValidatorsFromAssemblyContaining<T>()`.
Only `ValidationSeverity.Error` blocks the request; `Warning`/`Info` failures pass through and
are logged. The package has no FluentValidation dependency — the contract is intentionally
FluentValidation-shape-compatible so an optional adapter can be added later.
- **Validation contracts in `Stratara.Abstractions`** (namespace `Stratara.Abstractions.Validation`):
`IValidator<T>`, `ValidationResult`, `ValidationFailure`, `ValidationSeverity`, and
`StrataraValidationException`. Declaring the exception in `Stratara.Abstractions` lets a
consumer's global exception handler map validation failures to its own error model (e.g.
RFC-7807 ProblemDetails) without referencing the behavior package.
- **`Stratara.Security` — production key store + envelope encryption (dependency-light).** Adds
`EnvelopeFileKeyStore`, a file-backed `IKeyStore` storing **KEK-wrapped, versioned per-scope
data-encryption keys** (rotation, single-version revoke, and whole-scope crypto-shred), plus a
`FileMasterKeyProvider` (`IMasterKeyProvider`, the KEK custody seam), an AES-GCM
`ISecureBlobEncryptor`, and the Development-only `DummyKeyStore`. Register with
`AddStrataraFileKeyStore(configuration)`. The package references only `Stratara.Abstractions` +
BCL crypto + `Microsoft.Extensions.*` abstractions — no EF Core, RabbitMQ, Redis, or cloud SDKs —
so lean consumers can encrypt without pulling in `Stratara.Infrastructure`.
- **New security contracts in `Stratara.Abstractions.Security`:** `KeyScope`, `KeyMaterial`, and
`IMasterKeyProvider`.

### Changed

- **BREAKING — `IKeyStore`.** Replaced `EnsureKeyAsync(level, Guid? tenantId, Guid? userId)` with
`GetOrCreateCurrentKeyAsync(KeyScope)` returning `KeyMaterial` (key id + bytes in one call), and
added `RotateAsync(KeyScope)` and `EraseScopeAsync(KeyScope)`. `RevokeAsync(string keyId)` now
performs a real crypto-shred (the production store no longer treats it as a no-op). Scope
identifiers are `string?` (carrying both slugs and `Guid.ToString()` values) rather than `Guid?`.
- **BREAKING — `ISecureBlobEncryptor`.** `EncryptAsync`/`DecryptAsync` now take a `KeyScope` and a
`purpose` instead of a bare `Guid tenantId`. The encrypted stream gains a leading version byte
(v2) and a `purpose` field; legacy streams without the version byte remain readable (configurable
via `Stratara.Security` options).
- The AES-GCM encryption factory, blob encryptor, and dev key store moved out of
`Stratara.Infrastructure` into `Stratara.Security`; `AddSecurity()` now delegates to it. The
field/JSON `[EncryptData]` path (`ISecureJsonSerializer`) stays in `Stratara.Infrastructure`.

This brings the lockstep family to **22 packable packages**.