cache ethereum state in build job

[jacobkaufmann]

currently each payload build task retrieves the state for the given parent block hash (below).

https://github.com/jacobkaufmann/dark-builder/blob/170b23d9ead00eeaa24113affac0ca681014254a/src/builder.rs#L164

we should cache this state when the job is constructed instead.

state_by_block_hash returns a StateProviderBox which is not the most straightforward to work with.

[jacobkaufmann]

another benefit here is that the job will not require a StateProviderFactory, which will make the job easier to test

[chirag-bgh]

Hey @jacobkaufmann, I'm interested to work on this.

[jacobkaufmann]

let's wait until this is merged

[chirag-bgh]

let's wait until this is merged

Sure.