[Feature] Extend Provider Implementations

[emhane]

Component

provider

Describe the feature you would like

The alloy-provider crate has reqwest-backed implementations of the Provider trait, exposing provider implementations.

op-alloy-provider only provides an extension for the provider, but doesn't have implementations for traits in op-alloy.

This issue is to implement the BatchValidationProvider from the op-alloy-protocol crate in op-alloy-provider using the ReqwestProvider from alloy-provider. This can be hidden behind a feature flag if needed.

Exposing an implementation of the BatchValidationProvider using the ReqwestProvider allows downstream applications to easily plug in a ReqwestProvider for batch validation.

Additional context

No response

[sergerad]

@emhane I've put a PR together if you wanted to weigh in an give more instructions on how to proceed. My understanding of your issue description was that the approach should be same/similar to how the impl <N, T, P> EngineApiExt<N,T> for P works in engine.rs.

Also my understanding is that those BatchValidatorProvider fns can use the traditional Eth JSON RPC endpoints, rather than any Optimism specific ones.

Thanks!

[emhane]

thanks @sergerad ! forwarding your message to @refcell (the original author of this issue)