diff --git a/crates/starknet-devnet-types/src/rpc/contract_class/deprecated/mod.rs b/crates/starknet-devnet-types/src/rpc/contract_class/deprecated/mod.rs
index f1f7d8f9f..25cbed27f 100644
--- a/crates/starknet-devnet-types/src/rpc/contract_class/deprecated/mod.rs
+++ b/crates/starknet-devnet-types/src/rpc/contract_class/deprecated/mod.rs
@@ -1,82 +1,82 @@
-use serde::{Deserialize, Deserializer, Serialize, Serializer};
-use starknet_rs_core::types::CompressedLegacyContractClass;
-
-use crate::contract_class::deprecated::rpc_contract_class::DeprecatedContractClass;
+//use crate::contract_class::deprecated::rpc_contract_class::DeprecatedContractClass;
 use crate::contract_class::Cairo0Json;
 use crate::error::{DevnetResult, Error};
 use crate::felt::Felt;
 use crate::traits::HashProducer;
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+use starknet_api::deprecated_contract_class::ContractClass;
+use starknet_rs_core::types::CompressedLegacyContractClass;
 
 pub mod abi_entry;
 pub mod json_contract_class;
 pub mod rpc_contract_class;
 
 #[derive(Debug, Clone, Eq, PartialEq)]
-pub enum Cairo0ContractClass {
+pub enum StarknetApiContractClass {
     // TODO: remove once starknet_api raised
     RawJson(Cairo0Json),
-    Rpc(DeprecatedContractClass),
+    Rpc(ContractClass),
 }
 
-impl Serialize for Cairo0ContractClass {
+impl Serialize for StarknetApiContractClass {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where
         S: Serializer,
     {
         match self {
-            Cairo0ContractClass::RawJson(contract_json) => contract_json.serialize(serializer),
-            Cairo0ContractClass::Rpc(contract) => contract.serialize(serializer),
+            StarknetApiContractClass::RawJson(contract_json) => contract_json.serialize(serializer),
+            StarknetApiContractClass::Rpc(contract) => contract.serialize(serializer),
         }
     }
 }
 
-impl<'de> Deserialize<'de> for Cairo0ContractClass {
+impl<'de> Deserialize<'de> for StarknetApiContractClass {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
         D: Deserializer<'de>,
     {
-        Ok(Cairo0ContractClass::Rpc(DeprecatedContractClass::deserialize(deserializer)?))
+        Ok(StarknetApiContractClass::Rpc(ContractClass::deserialize(deserializer)?))
     }
 }
 
-impl From<Cairo0Json> for Cairo0ContractClass {
+impl From<Cairo0Json> for StarknetApiContractClass {
     fn from(value: Cairo0Json) -> Self {
-        Cairo0ContractClass::RawJson(value)
+        StarknetApiContractClass::RawJson(value)
     }
 }
 
-impl From<DeprecatedContractClass> for Cairo0ContractClass {
-    fn from(value: DeprecatedContractClass) -> Self {
-        Cairo0ContractClass::Rpc(value)
+impl From<ContractClass> for StarknetApiContractClass {
+    fn from(value: ContractClass) -> Self {
+        StarknetApiContractClass::Rpc(value)
     }
 }
 
-impl HashProducer for Cairo0ContractClass {
+impl HashProducer for StarknetApiContractClass {
     type Error = Error;
     fn generate_hash(&self) -> DevnetResult<Felt> {
         match self {
-            Cairo0ContractClass::RawJson(contract_json) => Ok(contract_json.generate_hash()?),
-            Cairo0ContractClass::Rpc(contract) => Ok(contract.generate_hash()?),
+            StarknetApiContractClass::RawJson(contract_json) => Ok(contract_json.generate_hash()?),
+            StarknetApiContractClass::Rpc(contract) => Ok(contract.generate_hash()?),
         }
     }
 }
 
-impl TryInto<CompressedLegacyContractClass> for Cairo0ContractClass {
+impl TryInto<CompressedLegacyContractClass> for StarknetApiContractClass {
     type Error = Error;
     fn try_into(self) -> Result<CompressedLegacyContractClass, Self::Error> {
         match self {
-            Cairo0ContractClass::Rpc(contract_class) => contract_class.try_into(),
-            Cairo0ContractClass::RawJson(contract_class) => contract_class.try_into(),
+            StarknetApiContractClass::Rpc(contract_class) => contract_class.try_into(),
+            StarknetApiContractClass::RawJson(contract_class) => contract_class.try_into(),
         }
     }
 }
 
-impl TryFrom<Cairo0ContractClass> for blockifier::execution::contract_class::ContractClassV0 {
+impl TryFrom<StarknetApiContractClass> for blockifier::execution::contract_class::ContractClassV0 {
     type Error = Error;
-    fn try_from(value: Cairo0ContractClass) -> Result<Self, Self::Error> {
+    fn try_from(value: StarknetApiContractClass) -> Result<Self, Self::Error> {
         match value {
-            Cairo0ContractClass::RawJson(contract_class) => contract_class.try_into(),
-            Cairo0ContractClass::Rpc(contract_class) => contract_class.try_into(),
+            StarknetApiContractClass::RawJson(contract_class) => contract_class.try_into(),
+            StarknetApiContractClass::Rpc(contract_class) => contract_class.try_into(),
         }
     }
 }
diff --git a/crates/starknet-devnet-types/src/rpc/contract_class/deprecated/rpc_contract_class.rs b/crates/starknet-devnet-types/src/rpc/contract_class/deprecated/rpc_contract_class.rs
index e54145123..5c02bfeca 100644
--- a/crates/starknet-devnet-types/src/rpc/contract_class/deprecated/rpc_contract_class.rs
+++ b/crates/starknet-devnet-types/src/rpc/contract_class/deprecated/rpc_contract_class.rs
@@ -1,7 +1,3 @@
-use serde::{Deserialize, Serialize};
-use serde_json::Value;
-use starknet_rs_core::types::{CompressedLegacyContractClass, LegacyEntryPointsByType};
-
 use crate::contract_class::deprecated::abi_entry::{AbiEntry, AbiEntryType};
 use crate::contract_class::Cairo0Json;
 use crate::error::{DevnetResult, Error, JsonError};
@@ -11,6 +7,10 @@ use crate::serde_helpers::base_64_gzipped_json_string::{
     serialize_program_to_base64,
 };
 use crate::traits::HashProducer;
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+use starknet_api::deprecated_contract_class::ContractClass;
+use starknet_rs_core::types::{CompressedLegacyContractClass, LegacyEntryPointsByType};
 
 #[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
 pub struct ContractClassAbiEntryWithType {
@@ -68,7 +68,7 @@ impl Default for DeprecatedContractClass {
     }
 }
 
-impl HashProducer for DeprecatedContractClass {
+impl HashProducer for ContractClass {
     type Error = Error;
     fn generate_hash(&self) -> DevnetResult<Felt> {
         let json_value: Cairo0Json = self.clone().try_into()?;
diff --git a/crates/starknet-devnet/tests/test_simulate_transactions.rs b/crates/starknet-devnet/tests/test_simulate_transactions.rs
index 812c615aa..30a88c720 100644
--- a/crates/starknet-devnet/tests/test_simulate_transactions.rs
+++ b/crates/starknet-devnet/tests/test_simulate_transactions.rs
@@ -103,7 +103,7 @@ mod simulation_tests {
         let contract_artifact: Arc<LegacyContractClass> =
             Arc::new(serde_json::from_value(contract_json.inner).unwrap());
 
-        let max_fee = FieldElement::ZERO; // TODO try 1e18 as u128 instead
+        let max_fee = FieldElement::from(1e18 as u128); // TODO try 1e18 as u128 instead - Done
         let nonce = FieldElement::ZERO;
 
         let signature = account