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The default transport for IAltchaVerifier / IAltchaChallengeProvider —
calls a self-hosted altcha service over gRPC.
Wire contract
- Protos/altcha.proto defines svrnty.cqrs.altcha.v1.AltchaService with
CreateChallenge + VerifyChallenge RPCs. Shipped in this package as
source-of-truth; Go (and other) implementations vendor a copy.
- Challenge.challenge_hash is named (not "challenge") to avoid a C#
property/class name collision; the MinimalApi widget JSON remaps.
Runtime
- AltchaGrpcVerifier maps RpcException → AltchaVerifyResult.Fail with
a diagnostic reason ("verify-timeout", "service-unavailable", etc.)
so the auth check surfaces a clean Unauthorized without leaking
transport detail.
- AltchaGrpcChallengeProvider lets create-challenge failures bubble
(challenge endpoint should 5xx if altcha is down — clients retry).
- AltchaGrpcOptions.TokenProvider hook for consumer-supplied HMAC
service-token minting (plan-b will plug in ServiceTokenIssuer).
- AddGrpcClient<AltchaServiceClient> registered with HttpClientFactory.
AddSvrntyAltchaGrpcVerifier(Action<...>) and overload binding from
IConfiguration cover both wiring styles.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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|---|---|---|
| .. | ||
| Protos | ||
| AltchaCallCredentials.cs | ||
| AltchaGrpcChallengeProvider.cs | ||
| AltchaGrpcOptions.cs | ||
| AltchaGrpcVerifier.cs | ||
| ServiceCollectionExtensions.cs | ||
| Svrnty.CQRS.Altcha.Grpc.csproj | ||