chore(derive-alloy): docs (#763)

crates/derive-alloy/README.md

@@ -1,5 +1,69 @@
 ## `kona-derive-alloy`
 
+<a href="https://github.com/anton-rs/kona/actions/workflows/rust_ci.yaml"><img src="https://github.com/anton-rs/kona/actions/workflows/rust_ci.yaml/badge.svg?label=ci" alt="CI"></a>
+<a href="https://crates.io/crates/kona-derive-alloy"><img src="https://img.shields.io/crates/v/kona-derive-alloy.svg?label=kona-derive-alloy&labelColor=2a2f35" alt="Kona Derive Alloy"></a>
+<a href="https://github.com/anton-rs/kona/blob/main/LICENSE.md"><img src="https://img.shields.io/badge/License-MIT-d1d1f6.svg?label=license&labelColor=2a2f35" alt="License"></a>
+<a href="https://img.shields.io/codecov/c/github/anton-rs/kona"><img src="https://img.shields.io/codecov/c/github/anton-rs/kona" alt="Codecov"></a>
+
 _Notice: Requires an `std` environment._
 
-An online, alloy-backed derivation pipeline, built on [`kona-derive`](../derive).
+An online, alloy-backed derivation pipeline, built on [`kona-derive`][d].
+
+## Usage
+
+The easiest way to use `kona-derive-alloy` to construct a derivation pipeline
+backed by [alloy][a] providers is to use the exported `new_online_pipeline` method.
+
+```rust
+use std::sync::Arc;
+use op_alloy_protocol::BlockInfo;
+use op_alloy_genesis::RollupConfig;
+use kona_derive_alloy::prelude::*;
+
+let rollup_config = Arc::new(RollupConfig::default());
+let chain_provider =
+    AlloyChainProvider::new_http("http://127.0.0.1:8545".try_into().unwrap());
+let l2_chain_provider = AlloyL2ChainProvider::new_http(
+    "http://127.0.0.1:9545".try_into().unwrap(),
+    rollup_config.clone(),
+);
+let beacon_client = OnlineBeaconClient::new_http("http://127.0.0.1:5555".into());
+let blob_provider = OnlineBlobProvider::new(beacon_client, None, None);
+let blob_provider = OnlineBlobProviderWithFallback::new(blob_provider, None);
+let dap_source =
+    EthereumDataSource::new(chain_provider.clone(), blob_provider, &rollup_config);
+let builder = StatefulAttributesBuilder::new(
+    rollup_config.clone(),
+    l2_chain_provider.clone(),
+    chain_provider.clone(),
+);
+let origin = BlockInfo::default();
+
+let pipeline = new_online_pipeline(
+    rollup_config.clone(),
+    chain_provider,
+    dap_source,
+    l2_chain_provider,
+    builder,
+    origin,
+);
+
+assert_eq!(pipeline.rollup_config, rollup_config);
+assert_eq!(pipeline.origin(), Some(origin));
+```
+
+## Features
+
+The most up-to-date feature list will be available on the
+[docs.rs `Feature Flags` tab][ff] of the `kona-derive-alloy` crate.
+
+Some features include the following.
+- `test-utils`: Test utilities for downstream libraries.
+
+<!--
+---- Links
+---->
+
+[a]: https://github.com/alloy-rs/alloy
+[d]: https://crates.io/crates/kona-derive
+[ff]: https://docs.rs/crate/kona-derive-alloy/latest/features

crates/derive-alloy/src/lib.rs

@@ -6,11 +6,6 @@
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
 #![cfg_attr(not(test), warn(unused_crate_dependencies))]
 
-#[cfg(any(test, feature = "test-utils"))]
-pub mod test_utils;
-#[cfg(any(test, feature = "test-utils"))]
-pub use test_utils::*;
-
 /// Re-export commonly used types and traits.
 pub mod prelude {
     pub use super::{
@@ -39,3 +34,6 @@ pub use blob_provider::{
     BlobSidecarProvider, OnlineBlobProvider, OnlineBlobProviderBuilder,
     OnlineBlobProviderWithFallback,
 };
+
+#[cfg(any(test, feature = "test-utils"))]
+pub mod test_utils;