fork/prague problems

[holiman]

I've been doing some early experimentation on eels using the prague fork, in goevmlab, as of holiman/goevmlab#196 .

The changes that I found which break are outlined as comments in that PR, but I'll summarise it here too:

• parentHash required, (previousHash ignored?)
• parentBeaconBlockRoot seems required?
• tracing simply dropped, in many (all?) places -- there's no jsonl output

[holiman]

cc @gurukamath @danceratopz

[gurukamath]

Based on the logs, it appears to me that you are using the running state tests. The first two issues (parentHash & parentBeaconBlockRoot) seem to me to be related to this. I assume that you are running the ethereum-spec-evm t8n command. You will need to explicitly pass the --state-test flag to this command so that it does not go looking for parentHash or parentBeaconBlockRoot.

Regarding the traces issue, I will look into it and get back.