rene

@liamsi post mainnet likely

Implemented along with #997

Is this closed by #756 @Wondertan ?

@liamsi sync is different from DAS. sync is only header sync rather than the actual block reconstruction. That happens during DAS

Now that [DASState](#848) is almost implemented, we should consider the storing of errors for parallel `catchUp` workers whenever this issue is tackled.

Idea for parallelisation: DASState will contain 1. sampleState (state of the sampling routine), 2. array of worker catchUp routine states ``` type State struct { sampleStateLk sync.Mutex sampleState RoutineState workerStates...

There are still issues with config modifier persistence. Looking into it...

@Wondertan I'm not sure if @tzdybal wants this.

Closing due to ^