Extract forked backend and db to a standalone repo

[mattsse]

Component

Forge

Describe the feature you would like

This type doesn't really depend on any foundry-specific types

foundry/crates/evm/core/src/fork/backend.rs

Lines 82 to 87 in 91074f1

	/// Handles an internal provider and listens for requests.
	///
	/// This handler will remain active as long as it is reachable (request channel still open) and
	/// requests are in progress.
	#[must_use = "futures do nothing unless polled"]
	pub struct BackendHandler<T, P> {

only:

foundry/crates/evm/core/src/fork/backend.rs

Lines 2 to 5 in 91074f1

	use crate::{
	backend::{DatabaseError, DatabaseResult},
	fork::{cache::FlushJsonBlockCacheDB, BlockchainDb},
	};

which can also be moved or removed.

TODO

• extract this mod to a standalone repo: https://github.com/foundry-rs/fork-db together with all the caching types

Additional context

No response

[teodorstupnicki]

hey @mattsse, I would like to give this one a try. Just want to clarify some stuff - this new repo is going to be a submodule of this one?

[mattsse]

we will do this in a few steps

2. copy current implementation to crate https://github.com/foundry-rs/alloy-fork-db
3. some touchups maybe
4. replace in foundry by pulling it in as a dependency

[teodorstupnicki]

thanks, understood