Starting with the node-template, I switched my chains block authoring from Aura to Babe, which compiles fine but does not manage to finalize any blocks. I suspect it's a wrong genesis configuration. The RPC call for grandpa roundState shows the following:


Not sure what I can extract from that.

My question is which part of the code is responsible for proper finalization.

  • You can take a look at this template. BABE and GRANDPA come built-in to the template.
    – Burak
    Commented Apr 20, 2022 at 15:07
  • Thanks, I'll check it out Commented Apr 20, 2022 at 15:15
  • How many nodes are you running? Are blocks being produced? Commented Apr 21, 2022 at 9:18
  • Are you getting an Unexpected epoch change error? Please include the errors coming from the terminal logs if there are any. This could be what you're looking for: github.com/paritytech/substrate/issues/4464 Commented Apr 21, 2022 at 11:10

2 Answers 2


I eventually solved it by removing the AuthorityDiscovery pallet, which I had integrated as well and was most likely just misconfigured.


Run the command of windows Power shell for update nightly:

  1. rustup update nightly

  2. rustup target add wasm32-unknown-unknown --toolchain nightly

  3. rustup update

  4. after that run build command: cargo build --release


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