diff --git a/crates/blockifier/src/blockifier/block.rs b/crates/blockifier/src/blockifier/block.rs
index d8db444c01..29f684a52f 100644
--- a/crates/blockifier/src/blockifier/block.rs
+++ b/crates/blockifier/src/blockifier/block.rs
@@ -1,5 +1,6 @@
 use std::num::NonZeroU128;
 
+use log::warn;
 use starknet_api::block::{BlockHash, BlockNumber, BlockTimestamp};
 use starknet_api::core::ContractAddress;
 use starknet_api::state::StorageKey;
@@ -42,15 +43,24 @@ impl GasPrices {
         strk_l1_gas_price: NonZeroU128,
         eth_l1_data_gas_price: NonZeroU128,
         strk_l1_data_gas_price: NonZeroU128,
+        eth_l2_gas_price: NonZeroU128,
+        strk_l2_gas_price: NonZeroU128,
     ) -> Self {
-        let eth_l2_gas_price = NonZeroU128::new(VersionedConstants::l1_to_l2_gas_price_conversion(
-            eth_l1_gas_price.into(),
-        ))
-        .unwrap();
-        let strk_l2_gas_price = NonZeroU128::new(
-            VersionedConstants::l1_to_l2_gas_price_conversion(strk_l1_gas_price.into()),
-        )
-        .unwrap();
+        // TODO(Aner): fix backwards compatibility.
+        if eth_l2_gas_price
+            != VersionedConstants::l1_to_l2_gas_price_conversion(eth_l1_gas_price.into())
+                .try_into()
+                .expect("L1 to L2 price conversion error (Rust side).")
+        {
+            warn!("eth_l2_gas_price does not match expected!")
+        }
+        if strk_l2_gas_price
+            != VersionedConstants::l1_to_l2_gas_price_conversion(strk_l1_gas_price.into())
+                .try_into()
+                .expect("L1 to L2 price conversion error (Rust side).")
+        {
+            warn!("strk_l2_gas_price does not match expected!")
+        }
         GasPrices {
             eth_l1_gas_price,
             strk_l1_gas_price,
diff --git a/crates/blockifier/src/fee/fee_test.rs b/crates/blockifier/src/fee/fee_test.rs
index 52ce692290..714c3d3a54 100644
--- a/crates/blockifier/src/fee/fee_test.rs
+++ b/crates/blockifier/src/fee/fee_test.rs
@@ -133,6 +133,10 @@ fn test_discounted_gas_overdraft(
         gas_price.try_into().unwrap(),
         DEFAULT_ETH_L1_DATA_GAS_PRICE.try_into().unwrap(),
         data_gas_price.try_into().unwrap(),
+        VersionedConstants::l1_to_l2_gas_price_conversion(DEFAULT_ETH_L1_GAS_PRICE)
+            .try_into()
+            .unwrap(),
+        VersionedConstants::l1_to_l2_gas_price_conversion(gas_price).try_into().unwrap(),
     );
 
     let account = FeatureContract::AccountWithoutValidations(CairoVersion::Cairo0);
diff --git a/crates/blockifier/src/test_utils/struct_impls.rs b/crates/blockifier/src/test_utils/struct_impls.rs
index 6b6e83b859..4f4236efbf 100644
--- a/crates/blockifier/src/test_utils/struct_impls.rs
+++ b/crates/blockifier/src/test_utils/struct_impls.rs
@@ -163,6 +163,12 @@ impl BlockInfo {
                 DEFAULT_STRK_L1_GAS_PRICE.try_into().unwrap(),
                 DEFAULT_ETH_L1_DATA_GAS_PRICE.try_into().unwrap(),
                 DEFAULT_STRK_L1_DATA_GAS_PRICE.try_into().unwrap(),
+                VersionedConstants::l1_to_l2_gas_price_conversion(DEFAULT_ETH_L1_GAS_PRICE)
+                    .try_into()
+                    .unwrap(),
+                VersionedConstants::l1_to_l2_gas_price_conversion(DEFAULT_STRK_L1_GAS_PRICE)
+                    .try_into()
+                    .unwrap(),
             ),
             use_kzg_da: false,
         }
diff --git a/crates/gateway/src/rpc_objects.rs b/crates/gateway/src/rpc_objects.rs
index d6898d024f..d5cdb3bf0e 100644
--- a/crates/gateway/src/rpc_objects.rs
+++ b/crates/gateway/src/rpc_objects.rs
@@ -90,6 +90,8 @@ impl TryInto<BlockInfo> for BlockHeader {
                 parse_gas_price(self.l1_gas_price.price_in_fri)?,
                 parse_gas_price(self.l1_data_gas_price.price_in_wei)?,
                 parse_gas_price(self.l1_data_gas_price.price_in_fri)?,
+                NonZeroU128::MIN,
+                NonZeroU128::MIN,
             ),
             use_kzg_da: matches!(self.l1_da_mode, L1DataAvailabilityMode::Blob),
         })
diff --git a/crates/native_blockifier/src/py_state_diff.rs b/crates/native_blockifier/src/py_state_diff.rs
index 634f6baac0..83df63412d 100644
--- a/crates/native_blockifier/src/py_state_diff.rs
+++ b/crates/native_blockifier/src/py_state_diff.rs
@@ -9,6 +9,7 @@ use blockifier::test_utils::{
     DEFAULT_STRK_L1_DATA_GAS_PRICE,
     DEFAULT_STRK_L1_GAS_PRICE,
 };
+use blockifier::versioned_constants::VersionedConstants;
 use indexmap::IndexMap;
 use pyo3::prelude::*;
 use pyo3::FromPyObject;
@@ -140,6 +141,7 @@ pub struct PyBlockInfo {
     pub block_timestamp: u64,
     pub l1_gas_price: PyResourcePrice,
     pub l1_data_gas_price: PyResourcePrice,
+    pub l2_gas_price: PyResourcePrice,
     pub sequencer_address: PyFelt,
     pub use_kzg_da: bool,
 }
@@ -158,6 +160,14 @@ impl Default for PyBlockInfo {
                 price_in_wei: DEFAULT_ETH_L1_DATA_GAS_PRICE,
                 price_in_fri: DEFAULT_STRK_L1_DATA_GAS_PRICE,
             },
+            l2_gas_price: PyResourcePrice {
+                price_in_wei: VersionedConstants::l1_to_l2_gas_price_conversion(
+                    DEFAULT_ETH_L1_GAS_PRICE,
+                ),
+                price_in_fri: VersionedConstants::l1_to_l2_gas_price_conversion(
+                    DEFAULT_STRK_L1_GAS_PRICE,
+                ),
+            },
             sequencer_address: PyFelt::default(),
             use_kzg_da: bool::default(),
         }
@@ -201,6 +211,20 @@ impl TryFrom<PyBlockInfo> for BlockInfo {
                         ),
                     )
                 })?,
+                block_info.l2_gas_price.price_in_wei.try_into().map_err(|_| {
+                    NativeBlockifierInputError::InvalidNativeBlockifierInputError(
+                        InvalidNativeBlockifierInputError::InvalidGasPriceWei(
+                            block_info.l2_gas_price.price_in_wei,
+                        ),
+                    )
+                })?,
+                block_info.l2_gas_price.price_in_fri.try_into().map_err(|_| {
+                    NativeBlockifierInputError::InvalidNativeBlockifierInputError(
+                        InvalidNativeBlockifierInputError::InvalidGasPriceFri(
+                            block_info.l2_gas_price.price_in_fri,
+                        ),
+                    )
+                })?,
             ),
             use_kzg_da: block_info.use_kzg_da,
         })
diff --git a/crates/papyrus_execution/src/lib.rs b/crates/papyrus_execution/src/lib.rs
index 3094f81820..cc39f2cc2e 100644
--- a/crates/papyrus_execution/src/lib.rs
+++ b/crates/papyrus_execution/src/lib.rs
@@ -359,6 +359,9 @@ fn create_block_context(
             NonZeroU128::new(l1_gas_price.price_in_fri.0).unwrap_or(NonZeroU128::MIN),
             NonZeroU128::new(l1_data_gas_price.price_in_wei.0).unwrap_or(NonZeroU128::MIN),
             NonZeroU128::new(l1_data_gas_price.price_in_fri.0).unwrap_or(NonZeroU128::MIN),
+            // TODO(Aner - Shahak): fix to come from pending_data/block_header.
+            NonZeroU128::MIN,
+            NonZeroU128::MIN,
         ),
     };
     let chain_info = ChainInfo {