diff --git a/sequencer/core/src/lib.rs b/sequencer/core/src/lib.rs
index 252a059e..50154c82 100644
--- a/sequencer/core/src/lib.rs
+++ b/sequencer/core/src/lib.rs
@@ -16,6 +16,7 @@ use mempool::{MemPool, MemPoolHandle};
 #[cfg(feature = "mock")]
 pub use mock::SequencerCoreWithMockClients;
 use nssa::V03State;
+use nssa_core::program::Timestamp;
 pub use storage::error::DbError;
 use testnet_initial_state::initial_state;
 
@@ -162,24 +163,20 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
         (sequencer_core, mempool_handle)
     }
 
-    fn next_block_timestamp_ms() -> nssa_core::program::Timestamp {
-        u64::try_from(chrono::Utc::now().timestamp_millis()).expect("Timestamp must be positive")
-    }
-
     fn execute_check_transaction_on_state(
         &mut self,
         tx: NSSATransaction,
+        block_id: u64,
+        curr_time: Timestamp,
     ) -> Result<NSSATransaction, nssa::error::NssaError> {
-        let block_id = self.next_block_id();
-        let timestamp_ms = Self::next_block_timestamp_ms();
         match &tx {
             NSSATransaction::Public(tx) => {
                 self.state
-                    .transition_from_public_transaction(tx, block_id, timestamp_ms)
+                    .transition_from_public_transaction(tx, block_id, curr_time)
             }
             NSSATransaction::PrivacyPreserving(tx) => self
                 .state
-                .transition_from_privacy_preserving_transaction(tx, block_id, timestamp_ms),
+                .transition_from_privacy_preserving_transaction(tx, block_id, curr_time),
             NSSATransaction::ProgramDeployment(tx) => self
                 .state
                 .transition_from_program_deployment_transaction(tx),
@@ -256,7 +253,7 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
                 break;
             }
 
-            match self.execute_check_transaction_on_state(tx) {
+            match self.execute_check_transaction_on_state(tx, new_block_height, curr_time) {
                 Ok(valid_tx) => {
                     valid_transactions.push(valid_tx);