feat: blobbasefee return ONE (#972)

crates/contracts/src/cairo1_helpers.cairo

@@ -13,8 +13,8 @@ pub trait IPrecompiles<T> {
     /// # Returns
     ///
     /// * A tuple containing:
-    ///   * A boolean indicating the success or failure of the execution.
-    ///   * The gas cost of the execution.
+    ///   * True if the execution was successful, false otherwise.
+    ///   * The gas cost of the execution if successful, otherwise 0.
     ///   * The output data from the execution.
     fn exec_precompile(self: @T, address: felt252, data: Span<u8>) -> (bool, u64, Span<u8>);
 }

crates/evm/src/instructions/block_information.cairo

@@ -9,6 +9,7 @@ use evm::gas;
 use evm::model::vm::{VM, VMTrait};
 use evm::stack::StackTrait;
 use evm::state::StateTrait;
+use utils::constants::MIN_BASE_FEE_PER_BLOB_GAS;
 use utils::traits::{EthAddressTryIntoResultContractAddress, EthAddressIntoU256};
 
 #[generate_trait]
@@ -131,7 +132,7 @@ pub impl BlockInformation of BlockInformationTrait {
     fn exec_blobbasefee(ref self: VM) -> Result<(), EVMError> {
         self.charge_gas(gas::BASE)?;
 
-        self.stack.push(0)
+        self.stack.push(MIN_BASE_FEE_PER_BLOB_GAS.into())
     }
 }
 
@@ -336,16 +337,16 @@ mod tests {
 
 
     #[test]
-    fn test_blobbasefee_should_return_zero() {
+    fn test_blobbasefee_should_return_one() {
         // Given
         let mut vm = VMBuilderTrait::new_with_presets().build();
 
         // When
         vm.exec_blobbasefee().unwrap();
 
         // Then
-        assert(vm.stack.len() == 1, 'stack should have one element');
-        assert(vm.stack.peek().unwrap() == 0, 'stack top should be 0');
+        assert_eq!(vm.stack.len(), 1);
+        assert_eq!(vm.stack.peek().unwrap(), 1);
     }
 
 

crates/utils/src/constants.cairo

@@ -11,6 +11,7 @@ pub const CONTRACT_ADDRESS_PREFIX: felt252 = 'STARKNET_CONTRACT_ADDRESS';
 
 // BLOCK
 pub const BLOCK_GAS_LIMIT: u64 = 7_000_000;
+pub const MIN_BASE_FEE_PER_BLOB_GAS: u64 = 1;
 // CHAIN_ID = KKRT (0x4b4b5254) in ASCII
 pub const CHAIN_ID: u64 = 1263227476;