What ❔

This PR adds an EigenDA client.

The implementation uses the gRPC streams to send the authenticated requests to dispatch the blob.
The protogen situation is very similar to Celestia, we use the generated files as a temporary solution until there is a separate crate that provides those.

This kind of function can be used to generate them in the future:

pub fn compile_protos() {
    let fds = protox::compile(
        [
            "proto/common.proto",
            "proto/disperser.proto",
        ],
        ["."],
    )
    .expect("protox failed to build");

    tonic_build::configure()
        .build_client(true)
        .build_server(false)
        .skip_protoc_run()
        .out_dir("generated")
        .compile_fds(fds)
        .unwrap();
}

Example config:

da_client:
  eigen:
    rpc_node_url: https://disperser-holesky.eigenda.xyz:443
    inclusion_polling_interval_ms: 10000

secrets:

da:
  eigen:
    private_key: PRIVATE_KEY_WITHOUT_0x_PREFIX

Why ❔

To enable EigenDA in ZK stack

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zkstack dev fmt and zkstack dev lint.