feat(delagation-cli): add readme

bolt-delegations-cli/README.md

@@ -1 +1,65 @@
-# Bolt Delegation CLI
+# Bolt Delegations CLI
+
+`bolt-delegations-cli` is a command-line tool for generating delegation messages signed with a BLS (Boneh–Lynn–Shacham) key. This tool allows node operators to safely generate delegations offline, enabling an air-gapped workflow to secure sensitive information like validator keys.
+
+The tool supports two key sources:
+
+-   Local: A BLS private key provided directly from a file.
+-   Keystore: A keystore file that contains an encrypted BLS private key, with the set [default password](https://github.com/chainbound/bolt/blob/a935fb36d75c997a4edb834f27a56bc62eb3570c/bolt-delegations-cli/src/utils.rs#L11).
+
+Features:
+
+-   Offline usage: Safely generate delegation messages in an offline environment.
+-   Flexible key source: Support for both direct local BLS private keys and Ethereum keystore files (ERC-2335 format).
+-   BLS delegation signing: Sign delegation messages using a BLS secret key and output the signed delegation in JSON format.
+
+## Usage
+
+```bash
+A CLI tool to generate signed delegation messages for BLS keys
+
+Usage: bolt-delegations-cli <COMMAND>
+
+Commands:
+  generate  Generate delegation messages
+  help      Print this message or the help of the given subcommand(s)
+
+Options:
+  -h, --help  Print help
+```
+
+### Example
+
+1. Using a local BLS private key:
+
+    ```bash
+    bolt-delegations-cli generate \
+        --source local \
+        --key-path ./private_key.txt \
+        --delegatee-pubkey 0x83eeddfac5e60f8fe607ee8713efb8877c295ad9f8ca075f4d8f6f2ae241a30dd57f78f6f3863a9fe0d5b5db9d550b93 \
+        --out ./delegations.json \
+        --chain kurtosis
+    ```
+
+2. Using an Ethereum keystore file:
+
+    ```bash
+    bolt-delegations-cli generate \
+        --source keystore \
+        --key-path ./keystore.json \
+        --delegatee-pubkey 0x83eeddfac5e60f8fe607ee8713efb8877c295ad9f8ca075f4d8f6f2ae241a30dd57f78f6f3863a9fe0d5b5db9d550b93 \
+        --out ./delegations.json \
+        --chain kurtosis
+    ```
+
+3. Using `.env` file:
+
+    Refer `.env.example` for the required environment variables.
+
+    ```env
+    SOURCE=local
+    KEY_PATH=private_key.txt
+    DELEGATEE_PUBKEY=0x95b4b2371fd882d98dc14e900578f927428d1cb6486f0b1483c9a8f659e90f19504f607b2d7a7a8046c637e40ca81e26
+    OUTPUT_FILE_PATH=delegations.json
+    CHAIN=kurtosis
+    ```

bolt-sidecar/src/signer/local.rs

@@ -23,7 +23,7 @@ type Result<T> = std::result::Result<T, LocalSignerError>;
 #[derive(Clone)]
 pub struct LocalSigner {
     chain: ChainConfig,
-    pub key: SecretKey,
+    key: SecretKey,
 }
 
 impl Debug for LocalSigner {

bolt-sidecar/src/test_util.rs

@@ -229,8 +229,6 @@ async fn generate_test_data_kurtosis() {
     // Create SignedDelegation
     let signed_delegation = SignedDelegation { message: delegation_msg, signature: consensus_sig };
 
-    println!("SK: {:?}", hex::encode(signer.key.to_bytes()));
-
     // Output SignedDelegation
     println!("{}", serde_json::to_string_pretty(&signed_delegation).unwrap());