Add merge messages to one file

lighthouse/tests/validator_manager.rs

@@ -503,6 +503,7 @@ pub fn validator_exit_defaults() {
                 beacon_url: Some(SensitiveUrl::parse("http://localhost:5052").unwrap()),
                 exit_epoch: None,
                 signature: false,
+                merge: false,
                 exit_status: false,
             };
             assert_eq!(expected, config);

validator_manager/src/exit_validators.rs

@@ -19,6 +19,7 @@ pub const VALIDATOR_FLAG: &str = "validators";
 pub const EXIT_EPOCH_FLAG: &str = "exit-epoch";
 pub const SIGNATURE_FLAG: &str = "signature";
 pub const EXIT_STATUS_FLAG: &str = "status";
+pub const MERGE_FLAG: &str = "merge";
 
 pub fn cli_app() -> Command {
     Command::new(CMD)
@@ -68,16 +69,37 @@ pub fn cli_app() -> Command {
             Arg::new(EXIT_EPOCH_FLAG)
                 .long(EXIT_EPOCH_FLAG)
                 .value_name("EPOCH")
-                .help("Provide the minimum epoch for processing voluntary exit.")
+                .help(
+                    "Provide the minimum epoch for processing voluntary exit. \
+                This flag is typically used in combination with `--signature` to \
+                save the voluntary exit signature to a file for future use.",
+                )
                 .action(ArgAction::Set)
                 .display_order(0),
         )
         .arg(
             Arg::new(SIGNATURE_FLAG)
                 .long(SIGNATURE_FLAG)
-                .help("Display the signature of the voluntary exit.")
+                .help(
+                    "Generate the voluntary exit signature and save it to a file \
+                named {validator_pubkey}.json. Note: Using this without the \
+                `--beacon-node` flag will not publish the voluntary exit to the network.",
+                )
+                .help_heading(FLAG_HEADER)
+                .action(ArgAction::SetTrue)
+                .display_order(0),
+        )
+        .arg(
+            Arg::new(MERGE_FLAG)
+                .long(MERGE_FLAG)
+                .help(
+                    "Merge the generated voluntary exit signatures into a single file named \
+                    `all_validators.json`. This flag has to be used together with \
+                the `--signature` flag.",
+                )
                 .help_heading(FLAG_HEADER)
                 .action(ArgAction::SetTrue)
+                .requires(SIGNATURE_FLAG)
                 .display_order(0),
         )
         .arg(
@@ -99,6 +121,7 @@ pub struct ExitConfig {
     pub beacon_url: Option<SensitiveUrl>,
     pub exit_epoch: Option<Epoch>,
     pub signature: bool,
+    pub merge: bool,
     pub exit_status: bool,
 }
 
@@ -123,6 +146,7 @@ impl ExitConfig {
             beacon_url: clap_utils::parse_optional(matches, BEACON_URL_FLAG)?,
             exit_epoch: clap_utils::parse_optional(matches, EXIT_EPOCH_FLAG)?,
             signature: matches.get_flag(SIGNATURE_FLAG),
+            merge: matches.get_flag(MERGE_FLAG),
             exit_status: matches.get_flag(EXIT_STATUS_FLAG),
         })
     }
@@ -149,6 +173,7 @@ async fn run<E: EthSpec>(config: ExitConfig) -> Result<(), String> {
         beacon_url,
         exit_epoch,
         signature,
+        merge,
         exit_status,
     } = config;
 
@@ -158,6 +183,8 @@ async fn run<E: EthSpec>(config: ExitConfig) -> Result<(), String> {
         validators_to_exit = validators.iter().map(|v| v.validating_pubkey).collect();
     }
 
+    let mut exit_message_all = Vec::new();
+
     for validator_to_exit in validators_to_exit {
         // Check that the validators_to_exit is in the validator client
         if !validators
@@ -174,13 +201,18 @@ async fn run<E: EthSpec>(config: ExitConfig) -> Result<(), String> {
 
         if signature {
             let exit_message_json = serde_json::to_string(&exit_message.data);
+
             match exit_message_json {
                 Ok(json) => {
-                    // Save the exit message to a JSON file
-                    let file_path = format!("validator_{}.json", validator_to_exit);
-                    std::fs::write(&file_path, json)
-                        .map_err(|e| format!("Failed to write exit message to file: {}", e))?;
-                    println!("Exit message saved to {}", file_path);
+                    // Save the exit message to JSON file(s)
+                    if merge {
+                        exit_message_all.push(json.clone());
+                    } else {
+                        let file_path = format!("{}.json", validator_to_exit);
+                        std::fs::write(&file_path, json)
+                            .map_err(|e| format!("Failed to write voluntary exit message to file: {}", e))?;
+                        println!("Voluntary exit message saved to {}", file_path);
+                    }
                 }
                 Err(e) => eprintln!("Failed to serialize voluntary exit message: {}", e),
             }
@@ -324,6 +356,14 @@ async fn run<E: EthSpec>(config: ExitConfig) -> Result<(), String> {
             }
         }
     }
+
+    if merge {
+        let all_json = serde_json::to_string(&exit_message_all)
+            .map_err(|e| format!("Failed to serialize voluntary exit message: {}", e))?;
+        std::fs::write("all_validators.json", all_json)
+            .map_err(|e| format!("Failed to write all voluntary exit messages to file: {}", e))?;
+        println!("All voluntary exit messages save to all_validators.json.")
+    }
     Ok(())
 }
 
@@ -484,6 +524,7 @@ mod test {
                 beacon_url: Some(beacon_url),
                 exit_epoch: None,
                 signature: false,
+                merge: false,
                 exit_status: false,
             });