diff --git a/crates/contracts/src/account_contract.cairo b/crates/contracts/src/account_contract.cairo
index 721e0284a..ba8358120 100644
--- a/crates/contracts/src/account_contract.cairo
+++ b/crates/contracts/src/account_contract.cairo
@@ -63,14 +63,13 @@ pub mod AccountContract {
     };
     use core::starknet::syscalls::{call_contract_syscall, replace_class_syscall};
     use core::starknet::{
-        EthAddress, ClassHash, VALIDATED, get_caller_address, get_contract_address, get_tx_info,
-        get_block_timestamp
+        EthAddress, ClassHash, VALIDATED, get_caller_address, get_tx_info, get_block_timestamp
     };
     use core::traits::TryInto;
     use openzeppelin::token::erc20::interface::{IERC20CamelDispatcher, IERC20CamelDispatcherTrait};
     use super::{IAccountLibraryDispatcher, IAccountDispatcherTrait, OutsideExecution};
     use utils::constants::{POW_2_32};
-    use utils::eth_transaction::transaction::{Transaction, TransactionTrait};
+    use utils::eth_transaction::transaction::Transaction;
     use utils::eth_transaction::validation::validate_eth_tx;
     use utils::eth_transaction::{EthTransactionTrait, TransactionMetadata};
     use utils::serialization::{deserialize_signature, deserialize_bytes, serialize_bytes};
@@ -233,13 +232,18 @@ pub mod AccountContract {
                 .expect('conversion failed')
                 .span();
 
-            let chain_id: u64 = tx_info.chain_id.try_into().unwrap() % POW_2_32.try_into().unwrap();
+            let _chain_id: u64 = tx_info
+                .chain_id
+                .try_into()
+                .unwrap() % POW_2_32
+                .try_into()
+                .unwrap();
 
             //TODO: add a type for unsigned transaction
             let unsigned_transaction = EthTransactionTrait::decode(
                 encoded_tx_data, Default::default()
             )
-                .expect('EOA: couldnt decode tx');
+                .expect('EOA: could not decode tx');
 
             //TODO: validate as part of execute_from_outside
             // let tx = EthTransactionTrait::decode(encoded_tx).expect('rlp decoding of tx failed');
@@ -338,7 +342,7 @@ pub mod AccountContract {
                 .expect('conversion to Span<u8> failed')
                 .span();
             let signed_transaction = EthTransactionTrait::decode(encoded_tx_data, signature)
-                .expect('couldnt decode tx');
+                .expect('could not decode tx');
             // TODO(execute-from-outside): move validation to KakarotCore
             let tx_metadata = TransactionMetadata {
                 address: self.Account_evm_address.read(),
diff --git a/crates/contracts/src/kakarot_core/interface.cairo b/crates/contracts/src/kakarot_core/interface.cairo
index 738f508c5..7addae72e 100644
--- a/crates/contracts/src/kakarot_core/interface.cairo
+++ b/crates/contracts/src/kakarot_core/interface.cairo
@@ -1,5 +1,5 @@
 use core::starknet::{ContractAddress, EthAddress, ClassHash};
-use utils::eth_transaction::transaction::{Transaction, TransactionTrait};
+use utils::eth_transaction::transaction::Transaction;
 
 #[starknet::interface]
 pub trait IKakarotCore<TContractState> {
diff --git a/crates/contracts/src/test_utils.cairo b/crates/contracts/src/test_utils.cairo
index 246c1026a..e391d35fa 100644
--- a/crates/contracts/src/test_utils.cairo
+++ b/crates/contracts/src/test_utils.cairo
@@ -15,7 +15,6 @@ use snforge_std::{
     stop_cheat_caller_address, start_cheat_caller_address_global
 };
 use utils::constants::BLOCK_GAS_LIMIT;
-use utils::eth_transaction::common::{TxKind, TxKindTrait};
 use utils::eth_transaction::legacy::TxLegacy;
 
 
diff --git a/crates/contracts/tests/test_execution_from_outside.cairo b/crates/contracts/tests/test_execution_from_outside.cairo
index defa72b8f..98a126fa3 100644
--- a/crates/contracts/tests/test_execution_from_outside.cairo
+++ b/crates/contracts/tests/test_execution_from_outside.cairo
@@ -276,7 +276,7 @@ fn test_execute_from_outside_invalid_signature() {
 }
 
 #[test]
-#[should_panic(expected: 'EOA: couldnt decode tx')]
+#[should_panic(expected: 'EOA: could not decode tx')]
 fn test_execute_from_outside_invalid_tx() {
     let (kakarot_core, contract_account) = set_up();
 
diff --git a/crates/evm/src/gas.cairo b/crates/evm/src/gas.cairo
index 76361b00b..8819d7d65 100644
--- a/crates/evm/src/gas.cairo
+++ b/crates/evm/src/gas.cairo
@@ -1,5 +1,5 @@
 use core::cmp::min;
-use utils::eth_transaction::common::{TxKind, TxKindTrait};
+use utils::eth_transaction::common::TxKindTrait;
 use utils::eth_transaction::eip2930::{AccessListItem};
 use utils::eth_transaction::transaction::{Transaction, TransactionTrait};
 use utils::helpers;
@@ -266,11 +266,9 @@ mod tests {
         ACCESS_LIST_STORAGE_KEY
     };
     use evm::test_utils::evm_address;
-    use utils::eth_transaction::common::{TxKind, TxKindTrait};
-    use utils::eth_transaction::eip1559::TxEip1559;
     use utils::eth_transaction::eip2930::{AccessListItem, TxEip2930};
     use utils::eth_transaction::legacy::TxLegacy;
-    use utils::eth_transaction::transaction::{Transaction, TransactionTrait};
+    use utils::eth_transaction::transaction::Transaction;
     use utils::helpers::ToBytes;
 
     #[test]
diff --git a/crates/utils/src/eth_transaction.cairo b/crates/utils/src/eth_transaction.cairo
index e0c654fad..79a5eae3e 100644
--- a/crates/utils/src/eth_transaction.cairo
+++ b/crates/utils/src/eth_transaction.cairo
@@ -13,10 +13,10 @@ use core::option::OptionTrait;
 use core::starknet::{EthAddress, secp256_trait::Signature,};
 use core::traits::TryInto;
 use crate::eth_transaction::common::TxKind;
-use eip1559::{TxEip1559, TxEip1559Trait};
-use eip2930::{TxEip2930, TxEip2930Trait};
+use eip1559::TxEip1559Trait;
+use eip2930::TxEip2930Trait;
 use legacy::TxLegacy;
-use transaction::{Transaction, TransactionSigned, TransactionTrait};
+use transaction::{Transaction, TransactionSigned};
 use tx_type::TxType;
 use utils::errors::{
     RLPErrorTrait, EthTransactionError, RLPError, RLPErrorImpl, RLPHelpersErrorImpl,
@@ -302,19 +302,14 @@ fn get_effective_gas_price(
 #[cfg(test)]
 mod tests {
     use core::option::OptionTrait;
-    use core::starknet::EthAddress;
-    use core::starknet::secp256_trait::{Signature};
     use crate::eth_transaction::eip2930::AccessListItem;
     use crate::eth_transaction::tx_type::TxType;
     use crate::traits::DefaultSignature;
     use evm::test_utils::chain_id;
-    use utils::eth_transaction::transaction::{Transaction, TransactionSigned, TransactionTrait};
+    use utils::eth_transaction::transaction::TransactionTrait;
 
-    use utils::eth_transaction::{
-        EthTransactionTrait, EncodedTransactionTrait, TransactionMetadata, EthTransactionError
-    };
-    use utils::helpers::{U256Trait, ToBytes};
-    use utils::rlp::{RLPTrait, RLPItem, RLPHelpersTrait};
+    use utils::eth_transaction::{EthTransactionTrait, EncodedTransactionTrait};
+    use utils::helpers::ToBytes;
     use utils::test_data::{
         legacy_rlp_encoded_tx, legacy_rlp_encoded_deploy_tx, eip_2930_encoded_tx,
         eip_1559_encoded_tx
diff --git a/crates/utils/src/eth_transaction/eip1559.cairo b/crates/utils/src/eth_transaction/eip1559.cairo
index 0a3b0c6a8..f588cc488 100644
--- a/crates/utils/src/eth_transaction/eip1559.cairo
+++ b/crates/utils/src/eth_transaction/eip1559.cairo
@@ -2,7 +2,7 @@ use core::num::traits::SaturatingSub;
 use crate::errors::{EthTransactionError, RLPError, RLPHelpersErrorTrait};
 use crate::eth_transaction::common::TxKind;
 use crate::eth_transaction::eip2930::AccessListItem;
-use crate::rlp::{RLPItem, RLPHelpersTrait, RLPTrait};
+use crate::rlp::{RLPItem, RLPHelpersTrait};
 use crate::traits::SpanDefault;
 
 /// A transaction with a priority fee ([EIP-1559](https://eips.ethereum.org/EIPS/eip-1559)).
diff --git a/crates/utils/src/eth_transaction/eip2930.cairo b/crates/utils/src/eth_transaction/eip2930.cairo
index 8108b7e32..09d0400b7 100644
--- a/crates/utils/src/eth_transaction/eip2930.cairo
+++ b/crates/utils/src/eth_transaction/eip2930.cairo
@@ -1,7 +1,7 @@
 use core::starknet::EthAddress;
 use crate::errors::{EthTransactionError, RLPError, RLPHelpersErrorTrait};
 use crate::eth_transaction::common::TxKind;
-use crate::rlp::{RLPItem, RLPHelpersTrait, RLPTrait};
+use crate::rlp::{RLPItem, RLPHelpersTrait};
 use crate::traits::SpanDefault;
 
 
diff --git a/crates/utils/src/eth_transaction/validation.cairo b/crates/utils/src/eth_transaction/validation.cairo
index 740a632b6..f59fa1cdd 100644
--- a/crates/utils/src/eth_transaction/validation.cairo
+++ b/crates/utils/src/eth_transaction/validation.cairo
@@ -1,5 +1,5 @@
 use core::starknet::eth_signature::verify_eth_signature;
-use crate::eth_transaction::transaction::{Transaction, TransactionSigned, TransactionTrait};
+use crate::eth_transaction::transaction::TransactionTrait;
 use crate::eth_transaction::{TransactionMetadata, EthTransactionError, EthTransactionTrait};
 
 /// Validate an Ethereum transaction