feat(p2p): add reth p2p enode command (#21357)

Co-authored-by: Amp <amp@ampcode.com>

crates/cli/commands/src/p2p/enode.rs

@@ -0,0 +1,34 @@
+//! Enode identifier command
+
+use clap::Parser;
+use reth_cli_util::get_secret_key;
+use reth_network_peers::NodeRecord;
+use std::{
+    net::{IpAddr, Ipv4Addr, SocketAddr},
+    path::PathBuf,
+};
+
+/// Print the enode identifier for a given secret key.
+#[derive(Parser, Debug)]
+pub struct Command {
+    /// Path to the secret key file for discovery.
+    pub discovery_secret: PathBuf,
+
+    /// Optional IP address to include in the enode URL.
+    ///
+    /// If not provided, defaults to 0.0.0.0.
+    #[arg(long)]
+    pub ip: Option<IpAddr>,
+}
+
+impl Command {
+    /// Execute the enode command.
+    pub fn execute(self) -> eyre::Result<()> {
+        let sk = get_secret_key(&self.discovery_secret)?;
+        let ip = self.ip.unwrap_or(IpAddr::V4(Ipv4Addr::UNSPECIFIED));
+        let addr = SocketAddr::new(ip, 30303);
+        let enr = NodeRecord::from_secret_key(addr, &sk);
+        println!("{enr}");
+        Ok(())
+    }
+}

crates/cli/commands/src/p2p/mod.rs

@@ -18,6 +18,7 @@ use reth_node_core::{
 };
 
 pub mod bootnode;
+pub mod enode;
 pub mod rlpx;
 
 /// `reth p2p` command
@@ -85,6 +86,9 @@ impl<C: ChainSpecParser<ChainSpec: EthChainSpec + Hardforks + EthereumHardforks>
             Subcommands::Bootnode(command) => {
                 command.execute().await?;
             }
+            Subcommands::Enode(command) => {
+                command.execute()?;
+            }
         }
 
         Ok(())
@@ -99,6 +103,7 @@ impl<C: ChainSpecParser> Command<C> {
             Subcommands::Body { args, .. } => Some(&args.chain),
             Subcommands::Rlpx(_) => None,
             Subcommands::Bootnode(_) => None,
+            Subcommands::Enode(_) => None,
         }
     }
 }
@@ -126,6 +131,8 @@ pub enum Subcommands<C: ChainSpecParser> {
     Rlpx(rlpx::Command),
     /// Bootnode command
     Bootnode(bootnode::Command),
+    /// Print enode identifier
+    Enode(enode::Command),
 }
 
 #[derive(Debug, Clone, Parser)]
@@ -225,4 +232,16 @@ mod tests {
         let _args: Command<EthereumChainSpecParser> =
             Command::parse_from(["reth", "body", "--chain", "mainnet", "1000"]);
     }
+
+    #[test]
+    fn parse_enode_cmd() {
+        let _args: Command<EthereumChainSpecParser> =
+            Command::parse_from(["reth", "enode", "/tmp/secret"]);
+    }
+
+    #[test]
+    fn parse_enode_cmd_with_ip() {
+        let _args: Command<EthereumChainSpecParser> =
+            Command::parse_from(["reth", "enode", "/tmp/secret", "--ip", "192.168.1.1"]);
+    }
 }