chore: handle panics in node.rs and add crate-level documentation

Makefile

@@ -17,6 +17,10 @@ rebuild-contracts:
 rust-build:
 	cargo build --release
 
+# Build the Rust documentation
+rust-doc:
+	cargo doc --no-deps --open
+
 # Lint checks for Rust code
 lint:
 	cargo fmt --all -- --check

src/main.rs

@@ -1,3 +1,47 @@
+//! zkSync Era In-Memory Node
+//!
+//! The `era-test-node` crate provides an in-memory node designed primarily for local testing.
+//! It supports forking the state from other networks, making it a valuable tool for integration testing,
+//! bootloader and system contract testing, and prototyping.
+//!
+//! ## Overview
+//!
+//! - **In-Memory Database**: The node uses an in-memory database for storing state information,
+//!   and employs simplified hashmaps for tracking blocks and transactions.
+//!
+//! - **Forking**: In fork mode, the node fetches missing storage data from a remote source if not available locally.
+//!
+//! - **Remote Server Interaction**: The node can use the remote server (openchain) to resolve the ABI and topics
+//!   to human-readable names.
+//!
+//! - **Local Testing**: Designed for local testing, this node is not intended for production use.
+//!
+//! ## Features
+//!
+//! - Fork the state of mainnet, testnet, or a custom network.
+//! - Replay existing mainnet or testnet transactions.
+//! - Use local bootloader and system contracts.
+//! - Operate deterministically in non-fork mode.
+//! - Start quickly with pre-configured 'rich' accounts.
+//! - Resolve names of ABI functions and Events using openchain.
+//!
+//! ## Limitations
+//!
+//! - No communication between Layer 1 and Layer 2.
+//! - Many APIs are not yet implemented.
+//! - No support for accessing historical data.
+//! - Only one transaction allowed per Layer 1 batch.
+//! - Fixed values returned for zk Gas estimation.
+//!
+//! ## Usage
+//!
+//! To start the node, use the command `era_test_node run`. For more advanced functionalities like forking or
+//! replaying transactions, refer to the official documentation.
+//!
+//! ## Contributions
+//!
+//! Contributions to improve `era-test-node` are welcome. Please refer to the contribution guidelines for more details.
+
 use clap::{Parser, Subcommand};
 use configuration_api::ConfigurationApiNamespaceT;
 use fork::ForkDetails;
@@ -234,7 +278,7 @@ async fn main() -> anyhow::Result<()> {
     );
 
     if !transactions_to_replay.is_empty() {
-        node.apply_txs(transactions_to_replay);
+        let _ = node.apply_txs(transactions_to_replay);
     }
 
     println!("\nRich Accounts");