Files
SpacetimeDB/crates/bindings-csharp/Runtime.Tests/Runtime.Tests.csproj
Jeffrey Dallatezza bf37b2947b Add bindings for csharp modules to use JWT claims (#3414)
# Description of Changes

This exposes JWT claims for csharp modules, similar to how they are
exposed to rust modules in
https://github.com/clockworklabs/SpacetimeDB/pull/3288.

This adds the new types `AuthCtx` and `JwtClaims`, and adds an `AuthCtx`
to the `ReducerContext`.

`AuthCtx` represents the credentials associated with the request, and
`JwtClaims` represents a jwt token.

One difference from the rust version is that I didn't create helpers to
build an `AuthCtx` from a jwt payload. The reason is that we would need
to be able to compute the identity from the payload claims, which
requires a blake3 hash implementation. The first two c# libraries I
found had issues at runtime
([Blake3](https://www.nuget.org/packages/Blake3) is wrapping a rust
implementation, and
[HashifyNet](https://github.com/Deskasoft/HashifyNET/tree/main/HashifyNet/Algorithms/Blake3)
seems to be broken by our trimming because it uses reflection heavily).
I can look into taking the implementation from `HashifyNet`, since it is
MIT licensed, but I don't think we need to block merging on that.

# API and ABI breaking changes

This adds the new types `AuthCtx` and `JwtClaims`, and adds an `AuthCtx`
to the `ReducerContext`.

This also adds a csharp wrapper for the get_jwt ABI function added in
https://github.com/clockworklabs/SpacetimeDB/pull/3288.

# Expected complexity level and risk

2.

# Testing

This has a very minimal unit test of JwtClaims.

I manually tested using this locally with the csharp quickstart, and I
was able to print jwt tokens inside the module.
2025-10-21 19:17:33 +00:00

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