feat(rp-rust): implement rp tool in Rust (#235)

rp/src/main.rs

@@ -0,0 +1,46 @@
+use std::process::exit;
+
+use cli::{Cli, Command};
+use exchange::exchange;
+use key::{genkey, pubkey};
+
+mod cli;
+mod exchange;
+mod key;
+
+#[tokio::main]
+async fn main() {
+    let cli = match Cli::parse(std::env::args().peekable()) {
+        Ok(cli) => cli,
+        Err(err) => {
+            eprintln!("{}", err);
+            exit(1);
+        }
+    };
+
+    let command = cli.command.unwrap();
+
+    let res = match command {
+        Command::GenKey { private_keys_dir } => genkey(&private_keys_dir),
+        Command::PubKey {
+            private_keys_dir,
+            public_keys_dir,
+        } => pubkey(&private_keys_dir, &public_keys_dir),
+        Command::Exchange(mut options) => {
+            options.verbose = cli.verbose;
+            exchange(options).await
+        }
+        Command::Help => {
+            println!("Usage: rp [verbose] genkey|pubkey|exchange [ARGS]...");
+            Ok(())
+        }
+    };
+
+    match res {
+        Ok(_) => {}
+        Err(err) => {
+            eprintln!("An error occurred: {}", err);
+            exit(1);
+        }
+    }
+}