lighthouse fast sync with --checkpoint-sync-url not working

[Utatistics]

Description

I am attempting to sync a Lighthouse beacon node on the Sepolia network with the command below, using a checkpoint sync URL for the option. However, I am encountering an error indicating that the content type returned by the checkpoint sync URL is not supported.

lighthouse bn \
  --network sepolia \
  --execution-endpoint http://localhost:8551 \
  --execution-jwt ~/geth-tutorial/jwtsecret \
  --checkpoint-sync-url https://sepolia.beaconstate.info \
  --http

Version

Lighthouse Version: v4.0.1-a53830f

Present Behaviour

Here's the error message mentioned above:

WARN Remote BN does not support EIP-4881 fast deposit sync, error: Error fetching deposit snapshot from remote: ServerMessage(ErrorMessage { code: 406, message: "unsupported content-type: application/octet-stream", stacktraces: [] }), service: beacon
CRIT Failed to start beacon node reason: Unable to parse SSZ: OffsetSkipsVariableBytes(392). Ensure the checkpoint-sync-url refers to a node for the correct network
INFO Internal shutdown received reason: Failed to start beacon node
INFO Shutting down.. reason: Failure("Failed to start beacon node")
Failed to start beacon node

Additionally, using curl -I https://sepolia.beaconstate.info returns:

HTTP/2 200
accept-ranges: bytes
alt-svc: h3=":443"; ma=2592000
content-type: text/html; charset=utf-8
date: Tue, 18 Jun 2024 08:38:50 GMT
server: Caddy
content-length: 653

With these, I understood that the URL returns content-type: text/html, which is not a valid format for the checkpoint sync data and therefore lighthouse is having trouble parsing it properly. (Correct me if I'm wrong) Finally, I have tried several other URLs listed here, but the results were the same.

Expected Behaviour

The Lighthouse beacon node should successfully parse the checkpoint sync data and start syncing from the provided URL. The checkpoint sync URL should return data in a supported binary format, such as SSZ.

[michaelsproul]

Please try a more recent LH release. v4 is too old as it is pre-Deneb

[Utatistics]

Sorry, I was using the version embedded in the sample code in the installation guide

This has fixed the problem, thank you.

[michaelsproul]

Oh, interesting. That's meant to just be an example, but we should probably keep that up to date with the major version.

Thanks!