diff --git a/core/lib/zksync_core/src/api_server/web3/backend_jsonrpc/error.rs b/core/lib/zksync_core/src/api_server/web3/backend_jsonrpc/error.rs
deleted file mode 100644
index 30f39fbefd8b..000000000000
--- a/core/lib/zksync_core/src/api_server/web3/backend_jsonrpc/error.rs
+++ /dev/null
@@ -1,43 +0,0 @@
-use std::fmt;
-
-use jsonrpc_core::{Error, ErrorCode};
-use zksync_web3_decl::error::Web3Error;
-
-use crate::api_server::web3::metrics::API_METRICS;
-
-pub fn into_jsrpc_error(err: Web3Error) -> Error {
-    Error {
-        code: match err {
-            Web3Error::InternalError | Web3Error::NotImplemented => ErrorCode::InternalError,
-            Web3Error::NoBlock
-            | Web3Error::NoSuchFunction
-            | Web3Error::RLPError(_)
-            | Web3Error::InvalidTransactionData(_)
-            | Web3Error::TooManyTopics
-            | Web3Error::FilterNotFound
-            | Web3Error::InvalidFeeParams(_)
-            | Web3Error::LogsLimitExceeded(_, _, _)
-            | Web3Error::InvalidFilterBlockHash => ErrorCode::InvalidParams,
-            Web3Error::SubmitTransactionError(_, _) | Web3Error::SerializationError(_) => 3.into(),
-            Web3Error::PubSubTimeout => 4.into(),
-            Web3Error::RequestTimeout => 5.into(),
-            Web3Error::TreeApiUnavailable => 6.into(),
-        },
-        message: match err {
-            Web3Error::SubmitTransactionError(_, _) => err.to_string(),
-            _ => err.to_string(),
-        },
-        data: match err {
-            Web3Error::SubmitTransactionError(_, data) => {
-                Some(format!("0x{}", hex::encode(data)).into())
-            }
-            _ => None,
-        },
-    }
-}
-
-pub fn internal_error(method_name: &'static str, error: impl fmt::Display) -> Web3Error {
-    tracing::error!("Internal error in method {method_name}: {error}");
-    API_METRICS.web3_internal_errors[&method_name].inc();
-    Web3Error::InternalError
-}
diff --git a/core/lib/zksync_core/src/api_server/web3/backend_jsonrpc/namespaces/zks.rs b/core/lib/zksync_core/src/api_server/web3/backend_jsonrpc/namespaces/zks.rs
deleted file mode 100644
index b305abc91515..000000000000
--- a/core/lib/zksync_core/src/api_server/web3/backend_jsonrpc/namespaces/zks.rs
+++ /dev/null
@@ -1,318 +0,0 @@
-use std::collections::HashMap;
-
-use bigdecimal::BigDecimal;
-use jsonrpc_core::{BoxFuture, Result};
-use jsonrpc_derive::rpc;
-use zksync_types::{
-    api::{
-        BlockDetails, BridgeAddresses, L1BatchDetails, L2ToL1LogProof, Proof, ProtocolVersion,
-        TransactionDetails,
-    },
-    fee::Fee,
-    transaction_request::CallRequest,
-    Address, L1BatchNumber, MiniblockNumber, H256, U256, U64,
-};
-use zksync_web3_decl::types::Token;
-
-use crate::{
-    l1_gas_price::L1GasPriceProvider,
-    web3::{backend_jsonrpc::error::into_jsrpc_error, namespaces::ZksNamespace},
-};
-
-#[rpc]
-pub trait ZksNamespaceT {
-    #[rpc(name = "zks_estimateFee")]
-    fn estimate_fee(&self, req: CallRequest) -> BoxFuture<Result<Fee>>;
-
-    #[rpc(name = "zks_estimateGasL1ToL2")]
-    fn estimate_gas_l1_to_l2(&self, req: CallRequest) -> BoxFuture<Result<U256>>;
-
-    #[rpc(name = "zks_getMainContract")]
-    fn get_main_contract(&self) -> BoxFuture<Result<Address>>;
-
-    #[rpc(name = "zks_getTestnetPaymaster")]
-    fn get_testnet_paymaster(&self) -> BoxFuture<Result<Option<Address>>>;
-
-    #[rpc(name = "zks_getBridgeContracts")]
-    fn get_bridge_contracts(&self) -> BoxFuture<Result<BridgeAddresses>>;
-
-    #[rpc(name = "zks_L1ChainId")]
-    fn l1_chain_id(&self) -> BoxFuture<Result<U64>>;
-
-    #[rpc(name = "zks_getConfirmedTokens")]
-    fn get_confirmed_tokens(&self, from: u32, limit: u8) -> BoxFuture<Result<Vec<Token>>>;
-
-    #[rpc(name = "zks_getTokenPrice")]
-    fn get_token_price(&self, token_address: Address) -> BoxFuture<Result<BigDecimal>>;
-
-    #[rpc(name = "zks_getAllAccountBalances")]
-    fn get_all_account_balances(
-        &self,
-        address: Address,
-    ) -> BoxFuture<Result<HashMap<Address, U256>>>;
-
-    #[rpc(name = "zks_getL2ToL1MsgProof")]
-    fn get_l2_to_l1_msg_proof(
-        &self,
-        block: MiniblockNumber,
-        sender: Address,
-        msg: H256,
-        l2_log_position: Option<usize>,
-    ) -> BoxFuture<Result<Option<L2ToL1LogProof>>>;
-
-    #[rpc(name = "zks_getL2ToL1LogProof")]
-    fn get_l2_to_l1_log_proof(
-        &self,
-        tx_hash: H256,
-        index: Option<usize>,
-    ) -> BoxFuture<Result<Option<L2ToL1LogProof>>>;
-
-    #[rpc(name = "zks_L1BatchNumber")]
-    fn get_l1_batch_number(&self) -> BoxFuture<Result<U64>>;
-
-    #[rpc(name = "zks_getBlockDetails")]
-    fn get_block_details(
-        &self,
-        block_number: MiniblockNumber,
-    ) -> BoxFuture<Result<Option<BlockDetails>>>;
-
-    #[rpc(name = "zks_getL1BatchBlockRange")]
-    fn get_miniblock_range(&self, batch: L1BatchNumber) -> BoxFuture<Result<Option<(U64, U64)>>>;
-
-    #[rpc(name = "zks_getTransactionDetails")]
-    fn get_transaction_details(&self, hash: H256) -> BoxFuture<Result<Option<TransactionDetails>>>;
-
-    #[rpc(name = "zks_getRawBlockTransactions")]
-    fn get_raw_block_transactions(
-        &self,
-        block_number: MiniblockNumber,
-    ) -> BoxFuture<Result<Vec<zksync_types::Transaction>>>;
-
-    #[rpc(name = "zks_getL1BatchDetails")]
-    fn get_l1_batch_details(
-        &self,
-        batch: L1BatchNumber,
-    ) -> BoxFuture<Result<Option<L1BatchDetails>>>;
-
-    #[rpc(name = "zks_getBytecodeByHash")]
-    fn get_bytecode_by_hash(&self, hash: H256) -> BoxFuture<Result<Option<Vec<u8>>>>;
-
-    #[rpc(name = "zks_getL1GasPrice")]
-    fn get_l1_gas_price(&self) -> BoxFuture<Result<U64>>;
-
-    #[rpc(name = "zks_getProtocolVersion")]
-    fn get_protocol_version(
-        &self,
-        version_id: Option<u16>,
-    ) -> BoxFuture<Result<Option<ProtocolVersion>>>;
-
-    #[rpc(name = "zks_getProof")]
-    fn get_proof(
-        &self,
-        address: Address,
-        keys: Vec<H256>,
-        l1_batch_number: L1BatchNumber,
-    ) -> BoxFuture<Result<Proof>>;
-}
-
-impl<G: L1GasPriceProvider + Send + Sync + 'static> ZksNamespaceT for ZksNamespace<G> {
-    fn estimate_fee(&self, req: CallRequest) -> BoxFuture<Result<Fee>> {
-        let self_ = self.clone();
-        Box::pin(async move { self_.estimate_fee_impl(req).await.map_err(into_jsrpc_error) })
-    }
-
-    fn estimate_gas_l1_to_l2(&self, req: CallRequest) -> BoxFuture<Result<U256>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .estimate_l1_to_l2_gas_impl(req)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_main_contract(&self) -> BoxFuture<Result<Address>> {
-        let self_ = self.clone();
-        Box::pin(async move { Ok(self_.get_main_contract_impl()) })
-    }
-
-    fn get_miniblock_range(&self, batch: L1BatchNumber) -> BoxFuture<Result<Option<(U64, U64)>>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_miniblock_range_impl(batch)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_testnet_paymaster(&self) -> BoxFuture<Result<Option<Address>>> {
-        let self_ = self.clone();
-        Box::pin(async move { Ok(self_.get_testnet_paymaster_impl()) })
-    }
-
-    fn get_bridge_contracts(&self) -> BoxFuture<Result<BridgeAddresses>> {
-        let self_ = self.clone();
-        Box::pin(async move { Ok(self_.get_bridge_contracts_impl()) })
-    }
-
-    fn l1_chain_id(&self) -> BoxFuture<Result<U64>> {
-        let self_ = self.clone();
-        Box::pin(async move { Ok(self_.l1_chain_id_impl()) })
-    }
-
-    fn get_confirmed_tokens(&self, from: u32, limit: u8) -> BoxFuture<Result<Vec<Token>>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_confirmed_tokens_impl(from, limit)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_token_price(&self, token_address: Address) -> BoxFuture<Result<BigDecimal>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_token_price_impl(token_address)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_all_account_balances(
-        &self,
-        address: Address,
-    ) -> BoxFuture<Result<HashMap<Address, U256>>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_all_account_balances_impl(address)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_l2_to_l1_msg_proof(
-        &self,
-        block: MiniblockNumber,
-        sender: Address,
-        msg: H256,
-        l2_log_position: Option<usize>,
-    ) -> BoxFuture<Result<Option<L2ToL1LogProof>>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_l2_to_l1_msg_proof_impl(block, sender, msg, l2_log_position)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_l2_to_l1_log_proof(
-        &self,
-        tx_hash: H256,
-        index: Option<usize>,
-    ) -> BoxFuture<Result<Option<L2ToL1LogProof>>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_l2_to_l1_log_proof_impl(tx_hash, index)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_l1_batch_number(&self) -> BoxFuture<Result<U64>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_l1_batch_number_impl()
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_block_details(
-        &self,
-        block_number: MiniblockNumber,
-    ) -> BoxFuture<Result<Option<BlockDetails>>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_block_details_impl(block_number)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_transaction_details(&self, hash: H256) -> BoxFuture<Result<Option<TransactionDetails>>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_transaction_details_impl(hash)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_raw_block_transactions(
-        &self,
-        block_number: MiniblockNumber,
-    ) -> BoxFuture<Result<Vec<zksync_types::Transaction>>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_raw_block_transactions_impl(block_number)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_l1_batch_details(
-        &self,
-        batch: L1BatchNumber,
-    ) -> BoxFuture<Result<Option<L1BatchDetails>>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_l1_batch_details_impl(batch)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-
-    fn get_bytecode_by_hash(&self, hash: H256) -> BoxFuture<Result<Option<Vec<u8>>>> {
-        let self_ = self.clone();
-        Box::pin(async move { Ok(self_.get_bytecode_by_hash_impl(hash).await) })
-    }
-
-    fn get_l1_gas_price(&self) -> BoxFuture<Result<U64>> {
-        let self_ = self.clone();
-        Box::pin(async move { Ok(self_.get_l1_gas_price_impl()) })
-    }
-
-    fn get_protocol_version(
-        &self,
-        version_id: Option<u16>,
-    ) -> BoxFuture<Result<Option<ProtocolVersion>>> {
-        let self_ = self.clone();
-        Box::pin(async move { Ok(self_.get_protocol_version_impl(version_id).await) })
-    }
-
-    fn get_proof(
-        &self,
-        address: Address,
-        keys: Vec<H256>,
-        l1_batch_number: L1BatchNumber,
-    ) -> BoxFuture<Result<Proof>> {
-        let self_ = self.clone();
-        Box::pin(async move {
-            self_
-                .get_proofs_impl(address, keys.clone(), l1_batch_number)
-                .await
-                .map_err(into_jsrpc_error)
-        })
-    }
-}