feat: use clap for cli and resolve pr comments

src/bin/tycho-encode.rs

@@ -1,5 +1,6 @@
 use std::io::{self, Read};
 
+use clap::Parser;
 use serde_json::Value;
 use tycho_core::dto::Chain;
 use tycho_execution::encoding::{
@@ -13,32 +14,15 @@ use tycho_execution::encoding::{
 };
 
 mod lib {
-    pub mod help;
+    pub mod cli;
 }
 
-const DEFAULT_ROUTER_ADDRESS: &str = "0xaa820C29648D5EA543d712cC928377Bd7206a0E7";
+use lib::cli::Cli;
+
 const DEFAULT_EXECUTORS_FILE_PATH: &str = "src/encoding/config/executor_addresses.json";
-const DEFAULT_PRIVATE_KEY: &str =
-    "0x938f4da9d3a947a4a6c53cfd8fcdd876641d6a4519243820b648af0bc3e67f7c";
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let args: Vec<String> = std::env::args().collect();
-
-    // Show help text if requested
-    if args.len() > 1 && (args[1] == "-h" || args[1] == "--help") {
-        println!("{}", lib::help::HELP_TEXT);
-        return Ok(());
-    }
-
-    let router_address = args
-        .get(1)
-        .map(|s| s.as_str())
-        .unwrap_or(DEFAULT_ROUTER_ADDRESS);
-
-    let private_key = args
-        .get(2)
-        .map(|s| s.to_string())
-        .or_else(|| Some(DEFAULT_PRIVATE_KEY.to_string()));
+    let cli = Cli::parse();
 
     // Read from stdin until EOF
     let mut buffer = String::new();
@@ -47,13 +31,11 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         .map_err(|e| format!("Failed to read from stdin: {}", e))?;
 
     if buffer.trim().is_empty() {
-        eprintln!("Error: No input provided");
-        eprintln!("{}", lib::help::HELP_TEXT);
-        std::process::exit(1);
+        return Err("No input provided. Expected JSON input on stdin.".into());
     }
 
     // Encode the solution
-    let encoded = encode_swaps(&buffer, router_address, private_key)?;
+    let encoded = encode_swaps(&buffer, &cli.router_address, cli.private_key)?;
 
     // Output the encoded result as JSON to stdout
     println!(