I was running the flashbots builder + prysm fork on sepolia, successfully building blocks before the Dencun upgrade. Now I am getting an error on the builder - could not unmarshal payload_attributes event err=“unexpected end of JSON input” and also Prysm fork cannot find the sync state because of this error(my assumption)
I’m sure the Flashbots team is aware of this.
The Dencun upgrade is related to rollup scalability and introduces some new payload attributes. These changes aren’t yet in the builder repo, which is probably why you’re seeing an 'unexpected end of JSON input" error.