chore(delagation-cli): improve err handling

bolt-delegations-cli/src/main.rs

@@ -7,24 +7,10 @@ use lighthouse_eth2_keystore::Keystore;
 
 use bolt_delegations_cli::{
     config::{Chain, Commands, Opts, SourceType},
-    types::{DelegationMessage, SignedDelegation},
+    types::{DelegationMessage, KeystoreError, SignedDelegation},
     utils::{compute_signing_root_for_delegation, parse_public_key, KEYSTORE_PASSWORD},
 };
 
-#[derive(Debug, thiserror::Error)]
-pub enum KeystoreError {
-    #[error("Failed to read keystore directory: {0}")]
-    ReadFromDirectory(#[from] std::io::Error),
-    #[error("Failed to read keystore from JSON file {0}: {1}")]
-    ReadFromJSON(String, String),
-    #[error("Failed to decrypt keypair from JSON file {0} with the provided password: {1}")]
-    KeypairDecryption(String, String),
-    #[error("Could not find private key associated with public key {0}")]
-    UnknownPublicKey(String),
-    #[error("Invalid signature key length. Signature: {0}. Message: {1}")]
-    SignatureLength(String, String),
-}
-
 fn main() -> Result<()> {
     let _ = dotenvy::dotenv();
 
@@ -69,12 +55,13 @@ fn generate_from_keystore(
     chain: &Chain,
 ) -> Result<SignedDelegation> {
     let keypair = Keystore::from_json_file(key_path)
-        .map_err(|e| KeystoreError::ReadFromJSON(key_path.to_owned(), format!("{e:?}")))?
+        .map_err(|e| KeystoreError::ReadFromJSON(key_path.to_string(), format!("{e:?}")))?
         .decrypt_keypair(KEYSTORE_PASSWORD.as_bytes())
-        .map_err(|e| KeystoreError::KeypairDecryption(key_path.to_owned(), format!("{e:?}")))?;
+        .map_err(|e| KeystoreError::KeypairDecryption(key_path.to_string(), format!("{e:?}")))?;
 
     let delegation = DelegationMessage::new(
-        BlsPublicKey::try_from(keypair.pk.to_string().as_ref())?,
+        BlsPublicKey::try_from(keypair.pk.to_string().as_ref())
+            .map_err(|e| KeystoreError::UnknownPublicKey(format!("{e:?}")))?,
         delegatee_pubkey,
     );
 

bolt-delegations-cli/src/types.rs

@@ -2,6 +2,16 @@ use alloy::signers::k256::sha2::{Digest, Sha256};
 use ethereum_consensus::crypto::{PublicKey as BlsPublicKey, Signature as BlsSignature};
 use serde::Serialize;
 
+#[derive(Debug, thiserror::Error)]
+pub enum KeystoreError {
+    #[error("Failed to read keystore from JSON file {0}: {1}")]
+    ReadFromJSON(String, String),
+    #[error("Failed to decrypt keypair from JSON file {0} with the provided password: {1}")]
+    KeypairDecryption(String, String),
+    #[error("Failed to get public key from keypair: {0}")]
+    UnknownPublicKey(String),
+}
+
 /// Event types that can be emitted by the validator pubkey to
 /// signal some action on the Bolt protocol.
 #[derive(Debug, Clone, Copy)]

bolt-delegations-cli/src/utils.rs

@@ -16,7 +16,7 @@ pub const COMMIT_BOOST_DOMAIN_MASK: [u8; 4] = [109, 109, 111, 67];
 pub fn parse_public_key(delegatee_pubkey: &str) -> Result<BlsPublicKey> {
     let hex_pk = delegatee_pubkey.strip_prefix("0x").unwrap_or(delegatee_pubkey);
     BlsPublicKey::try_from(hex::decode(hex_pk).expect("Failed to decode pubkey").as_slice())
-        .map_err(|e| eyre::eyre!("Failed to parse public key from string '{}': {}", hex_pk, e))
+        .map_err(|e| eyre::eyre!("Failed to parse public key '{}': {}", hex_pk, e))
 }
 
 /// Helper function to compute the signing root for a delegation message