diff --git a/core/lib/config/src/configs/wallets.rs b/core/lib/config/src/configs/wallets.rs
index 678adb674f14..7b74cd441166 100644
--- a/core/lib/config/src/configs/wallets.rs
+++ b/core/lib/config/src/configs/wallets.rs
@@ -1,7 +1,7 @@
 use zksync_basic_types::{Address, H160, H256};
 use zksync_crypto_primitives::K256PrivateKey;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct AddressWallet {
     address: Address,
 }
@@ -16,7 +16,7 @@ impl AddressWallet {
     }
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct Wallet {
     address: Address,
     private_key: K256PrivateKey,
@@ -58,18 +58,18 @@ impl Wallet {
     }
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct EthSender {
     pub operator: Wallet,
     pub blob_operator: Option<Wallet>,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct StateKeeper {
     pub fee_account: AddressWallet,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct Wallets {
     pub eth_sender: Option<EthSender>,
     pub state_keeper: Option<StateKeeper>,
diff --git a/core/lib/config/src/testonly.rs b/core/lib/config/src/testonly.rs
index a05b3d096253..b86904315508 100644
--- a/core/lib/config/src/testonly.rs
+++ b/core/lib/config/src/testonly.rs
@@ -9,6 +9,7 @@ use zksync_basic_types::{
     L1BatchNumber, L1ChainId, L2ChainId,
 };
 use zksync_consensus_utils::EncodeDist;
+use zksync_crypto_primitives::K256PrivateKey;
 
 use crate::configs::{self, eth_sender::PubdataSendingMode};
 
@@ -681,11 +682,11 @@ impl Distribution<configs::GenesisConfig> for EncodeDist {
                 .unwrap(),
                 patch: VersionPatch(rng.gen()),
             }),
-            genesis_root_hash: rng.gen(),
-            rollup_last_leaf_index: self.sample(rng),
-            genesis_commitment: rng.gen(),
-            bootloader_hash: rng.gen(),
-            default_aa_hash: rng.gen(),
+            genesis_root_hash: Some(rng.gen()),
+            rollup_last_leaf_index: Some(self.sample(rng)),
+            genesis_commitment: Some(rng.gen()),
+            bootloader_hash: Some(rng.gen()),
+            default_aa_hash: Some(rng.gen()),
             fee_account: rng.gen(),
             l1_chain_id: L1ChainId(self.sample(rng)),
             l2_chain_id: L2ChainId::default(),
@@ -804,3 +805,56 @@ impl Distribution<configs::secrets::Secrets> for EncodeDist {
         }
     }
 }
+
+impl Distribution<configs::wallets::Wallet> for EncodeDist {
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> configs::wallets::Wallet {
+        configs::wallets::Wallet::new(K256PrivateKey::from_bytes(rng.gen()).unwrap())
+    }
+}
+
+impl Distribution<configs::wallets::AddressWallet> for EncodeDist {
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> configs::wallets::AddressWallet {
+        configs::wallets::AddressWallet::from_address(rng.gen())
+    }
+}
+
+impl Distribution<configs::wallets::StateKeeper> for EncodeDist {
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> configs::wallets::StateKeeper {
+        configs::wallets::StateKeeper {
+            fee_account: self.sample(rng),
+        }
+    }
+}
+
+impl Distribution<configs::wallets::EthSender> for EncodeDist {
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> configs::wallets::EthSender {
+        configs::wallets::EthSender {
+            operator: self.sample(rng),
+            blob_operator: self.sample_opt(|| self.sample(rng)),
+        }
+    }
+}
+
+impl Distribution<configs::wallets::Wallets> for EncodeDist {
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> configs::wallets::Wallets {
+        configs::wallets::Wallets {
+            state_keeper: self.sample_opt(|| self.sample(rng)),
+            eth_sender: self.sample_opt(|| self.sample(rng)),
+        }
+    }
+}
+
+impl Distribution<configs::en_config::ENConfig> for EncodeDist {
+    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> configs::en_config::ENConfig {
+        configs::en_config::ENConfig {
+            l2_chain_id: L2ChainId::default(),
+            l1_chain_id: L1ChainId(rng.gen()),
+            main_node_url: format!("localhost:{}", rng.gen::<u16>()).parse().unwrap(),
+            l1_batch_commit_data_generator_mode: match rng.gen_range(0..2) {
+                0 => L1BatchCommitmentMode::Rollup,
+                _ => L1BatchCommitmentMode::Validium,
+            },
+            main_node_rate_limit_rps: self.sample_opt(|| rng.gen()),
+        }
+    }
+}
diff --git a/core/lib/crypto_primitives/src/ecdsa_signature.rs b/core/lib/crypto_primitives/src/ecdsa_signature.rs
index 026e42307dc6..a994e0f3c134 100644
--- a/core/lib/crypto_primitives/src/ecdsa_signature.rs
+++ b/core/lib/crypto_primitives/src/ecdsa_signature.rs
@@ -43,7 +43,7 @@ type Public = H512;
 ///
 /// Provides a safe to use `Debug` implementation (outputting the address corresponding to the key).
 /// The key is zeroized on drop.
-#[derive(Clone)]
+#[derive(Clone, PartialEq)]
 pub struct K256PrivateKey(SecretKey);
 
 impl fmt::Debug for K256PrivateKey {
diff --git a/core/lib/protobuf_config/src/en.rs b/core/lib/protobuf_config/src/en.rs
index b72a5b142cfb..b6323de6ea61 100644
--- a/core/lib/protobuf_config/src/en.rs
+++ b/core/lib/protobuf_config/src/en.rs
@@ -44,7 +44,7 @@ impl ProtoRepr for proto::ExternalNode {
                 )
                 .into(),
             ),
-            main_node_rate_limit_rps: this.main_node_rate_limit_rps.map(|a| a.get() as u32),
+            main_node_rate_limit_rps: this.main_node_rate_limit_rps.map(|a| a.get() as u64),
         }
     }
 }
diff --git a/core/lib/protobuf_config/src/lib.rs b/core/lib/protobuf_config/src/lib.rs
index f7eb19f0d60c..0fbe46414c95 100644
--- a/core/lib/protobuf_config/src/lib.rs
+++ b/core/lib/protobuf_config/src/lib.rs
@@ -28,7 +28,6 @@ mod secrets;
 mod snapshots_creator;
 
 mod snapshot_recovery;
-pub mod testonly;
 #[cfg(test)]
 mod tests;
 mod utils;
diff --git a/core/lib/protobuf_config/src/proto/config/en.proto b/core/lib/protobuf_config/src/proto/config/en.proto
index ac7cb59b156a..b0ec165b2f61 100644
--- a/core/lib/protobuf_config/src/proto/config/en.proto
+++ b/core/lib/protobuf_config/src/proto/config/en.proto
@@ -7,6 +7,6 @@ message ExternalNode {
   optional string main_node_url = 1; // required
   optional uint64 l2_chain_id = 2; // required
   optional uint64 l1_chain_id = 3; // required
-  optional uint32 main_node_rate_limit_rps = 6; // optional
+  optional uint64 main_node_rate_limit_rps = 6; // optional
   optional config.genesis.L1BatchCommitDataGeneratorMode l1_batch_commit_data_generator_mode = 7; // optional, default to rollup
 }
diff --git a/core/lib/protobuf_config/src/testonly.rs b/core/lib/protobuf_config/src/testonly.rs
deleted file mode 100644
index 8b137891791f..000000000000
--- a/core/lib/protobuf_config/src/testonly.rs
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/core/lib/protobuf_config/src/tests.rs b/core/lib/protobuf_config/src/tests.rs
index 8c7358ac28ea..3cb18c5bbf6d 100644
--- a/core/lib/protobuf_config/src/tests.rs
+++ b/core/lib/protobuf_config/src/tests.rs
@@ -39,6 +39,9 @@ fn test_encoding() {
     test_encode_all_formats::<ReprConv<proto::prover::ProofDataHandler>>(rng);
     test_encode_all_formats::<ReprConv<proto::snapshot_creator::SnapshotsCreator>>(rng);
     test_encode_all_formats::<ReprConv<proto::observability::Observability>>(rng);
+    test_encode_all_formats::<ReprConv<proto::wallets::Wallets>>(rng);
+    test_encode_all_formats::<ReprConv<proto::genesis::Genesis>>(rng);
+    test_encode_all_formats::<ReprConv<proto::en::ExternalNode>>(rng);
 }
 
 #[test]
diff --git a/core/lib/protobuf_config/src/wallets.rs b/core/lib/protobuf_config/src/wallets.rs
index 1c3b7413de60..31fa63fd2702 100644
--- a/core/lib/protobuf_config/src/wallets.rs
+++ b/core/lib/protobuf_config/src/wallets.rs
@@ -66,12 +66,20 @@ impl ProtoRepr for proto::Wallets {
                 .as_ref()
                 .map(|blob| proto::PrivateKeyWallet {
                     address: Some(format!("{:?}", blob.address())),
-                    private_key: Some(format!("{:?}", blob.private_key())),
+                    private_key: Some(hex::encode(
+                        blob.private_key().expose_secret().secret_bytes(),
+                    )),
                 });
             (
                 Some(proto::PrivateKeyWallet {
                     address: Some(format!("{:?}", eth_sender.operator.address())),
-                    private_key: Some(format!("{:?}", eth_sender.operator.private_key())),
+                    private_key: Some(hex::encode(
+                        eth_sender
+                            .operator
+                            .private_key()
+                            .expose_secret()
+                            .secret_bytes(),
+                    )),
                 }),
                 blob,
             )