feat(utils): add util to retrieve default peer ID secret keys (#3335)

Co-authored-by: Shamil <[email protected]>

Cargo.toml

@@ -451,6 +451,7 @@ scale-value = "^0.10"                                                     # gsdk
 heck = "0.4.1"                                                            # gsdk-api-gen
 etc = "0.1.16"                                                            # gcli
 scale-decode = "0.7.0"                                                    # gsdk
+directories = "5.0.1"                                                     # utils/key-finder
 
 [profile.release]
 panic = "unwind"

utils/key-finder/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "gear-key-finder"
+version.workspace = true
+authors.workspace = true
+edition.workspace = true
+
+[[bin]]
+name = "gear-key-finder"
+
+[dependencies]
+hex = { workspace = true, features = ["alloc"] }
+directories.workspace = true

utils/key-finder/src/main.rs

@@ -0,0 +1,41 @@
+use directories::ProjectDirs;
+
+const VERSIONS: [&str; 7] = [
+    "staging_testnet",
+    "staging_testnet_v2",
+    "gear_staging_testnet_v3",
+    "gear_staging_testnet_v4",
+    "gear_staging_testnet_v5",
+    "gear_staging_testnet_v6",
+    "gear_staging_testnet_v7",
+];
+
+const PATHS: [&str; 2] = ["gear", "gear-node"];
+
+fn main() {
+    let mut found = false;
+    for path in PATHS {
+        let chains_path = ProjectDirs::from("", "", path)
+            .unwrap()
+            .data_local_dir()
+            .join("chains");
+        if chains_path.is_dir() {
+            for version in VERSIONS {
+                let mut key_path = chains_path.join(version);
+                key_path.extend(&["network", "secret_ed25519"]);
+                if key_path.is_file() {
+                    let key = std::fs::read(&key_path);
+                    if let Ok(key) = key {
+                        println!("Key found in \"{path}/{version}\": 0x{}", hex::encode(key));
+                        found = true;
+                    } else {
+                        eprintln!("Failed to read key from {path:?}",);
+                    }
+                }
+            }
+        }
+    }
+    if !found {
+        println!("No key file was found. Please try to run this utility with `sudo`.");
+    }
+}