Create DAML App with Canton and Navigator problem

Questions
1

I’m running the Create DAML App example with Canton, as described in the Canton docs: https://www.canton.io/docs/stable/user-manual/tutorials/use_daml_sdk.html#running-the-create-daml-app-example

The custom UI works fine, but when I try to attach Navigator, I get an error message:

bgy@BGY create-daml-app % daml ledger navigator --host localhost --port 7575
Opening navigator at localhost:7575
daml-helper: GRPCIOBadStatusCode StatusUnavailable (StatusDetails {unStatusDetails = "Trying to connect an http1.x server"})

Maybe some of you can see from the error message what I am doing wrongly?

Maybe it’s that the custom UI uses websocket connection, and the Navigator cannot attach to the same port?

The json api sends the following error message:

14:00:43.808 [http-json-ledger-api-akka.actor.default-dispatcher-12] WARN  akka.actor.ActorSystemImpl - Illegal request, responding with status '501 Not Implemented': Unsupported HTTP method: PRI
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2

7575 is usually the port of the JSON API, which is a HTTP 1.x server as per the error message. You need to connect navigator to the gRPC API of your canton node. You should find that in the canton participant config.

2 Likes
3

Yes, thank you!

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