refactor: pull submit logic into builder_helper module (#142)

# refactor: pull submit logic into `builder_helper` module

This PR pulls the current Builder submit logic into its own module `builder_helper` to prepare for addition of a Flashbots crate and transaction submitter.

Author: dylanlott

bin/builder.rs

@@ -3,7 +3,7 @@ use builder::{
     service::serve_builder,
     tasks::{
         block::sim::Simulator, cache::CacheTasks, env::EnvTask, metrics::MetricsTask,
-        submit::SubmitTask,
+        submit::BuilderHelperTask,
     },
 };
 use init4_bin_base::{
@@ -51,7 +51,7 @@ async fn main() -> eyre::Result<()> {
     let (tx_channel, metrics_jh) = metrics.spawn();
 
     // Make a Tx submission task
-    let submit = SubmitTask {
+    let submit = BuilderHelperTask {
         zenith,
         quincey,
         config: config.clone(),

src/tasks/submit/builder_helper/mod.rs

@@ -0,0 +1,2 @@
+mod submit;
+pub use submit::{BuilderHelperTask, ControlFlow};

src/tasks/submit/task.rs renamed to src/tasks/submit/builder_helper/submit.rs

@@ -65,9 +65,10 @@ pub enum ControlFlow {
     Done,
 }
 
-/// Submits sidecars in ethereum txns to mainnet ethereum
+/// Submits rollup blocks as blob sidecars in ethereum txns to
+/// mainnet ethereum by crafting a `BuilderHelper` contract call.
 #[derive(Debug)]
-pub struct SubmitTask {
+pub struct BuilderHelperTask {
     /// Zenith
     pub zenith: ZenithInstance,
     /// Quincey
@@ -80,7 +81,7 @@ pub struct SubmitTask {
     pub outbound_tx_channel: mpsc::UnboundedSender<TxHash>,
 }
 
-impl SubmitTask {
+impl BuilderHelperTask {
     /// Get the provider from the zenith instance
     const fn provider(&self) -> &HostProvider {
         self.zenith.provider()

src/tasks/submit/mod.rs

@@ -4,5 +4,5 @@ pub use prep::{Bumpable, SubmitPrep};
 mod sim_err;
 pub use sim_err::{SimErrorResp, SimRevertKind};
 
-mod task;
-pub use task::{ControlFlow, SubmitTask};
+mod builder_helper;
+pub use builder_helper::{BuilderHelperTask, ControlFlow};