feat: Added tool to recover public keys from secret keys (#224)

node/tools/src/bin/keys.rs

@@ -1,11 +1,11 @@
-//! This tool generates a validator key pair and prints it to stdout.
+//! This tool generates a validator/attester/node key pair and prints it to stdout.
 #![allow(clippy::print_stdout)]
 
 use crypto::TextFmt as _;
 use zksync_consensus_crypto as crypto;
 use zksync_consensus_roles::{attester, node, validator};
 
-/// This tool generates a validator key pair and prints it to stdout.
+/// This tool generates a validator/attester/node key pair and prints it to stdout.
 fn main() {
     let validator_key = validator::SecretKey::generate();
     let attester_key = attester::SecretKey::generate();

node/tools/src/bin/keys_recovery.rs

@@ -0,0 +1,43 @@
+//! This tool calculates a node/validator public key from its corresponding secret key and prints it to stdout.
+#![allow(clippy::print_stdout)]
+
+use crypto::TextFmt as _;
+use std::io;
+use zksync_consensus_crypto as crypto;
+use zksync_consensus_roles::{node, validator};
+
+/// This tool calculates a node/validator public key from its corresponding secret key and prints it to stdout.
+fn main() {
+    println!("Please enter the node secret key (don't trim the identifiers at the beginning) or leave empty to skip:");
+
+    let mut input = String::new();
+
+    io::stdin()
+        .read_line(&mut input)
+        .expect("Failed to read line");
+
+    let input = input.trim();
+
+    if !input.is_empty() {
+        let text = crypto::Text::new(input);
+        let secret_key = node::SecretKey::decode(text).expect("Failed to decode the secret key");
+        println!("{}", secret_key.public().encode());
+    }
+
+    println!("Please enter the validator secret key (don't trim the identifiers at the beginning) or leave empty to skip:");
+
+    let mut input = String::new();
+
+    io::stdin()
+        .read_line(&mut input)
+        .expect("Failed to read line");
+
+    let input = input.trim();
+
+    if !input.is_empty() {
+        let text = crypto::Text::new(input);
+        let secret_key =
+            validator::SecretKey::decode(text).expect("Failed to decode the secret key");
+        println!("{}", secret_key.public().encode());
+    }
+}