diff --git a/contracts/gw-utils/src/finality.rs b/contracts/gw-utils/src/finality.rs
index 97f4a76..dc28485 100644
--- a/contracts/gw-utils/src/finality.rs
+++ b/contracts/gw-utils/src/finality.rs
@@ -67,27 +67,16 @@ pub fn is_block_number_finalized(
     match Timepoint::from_full_value(prev_global_state.last_finalized_block_number().unpack()) {
         Timepoint::BlockNumber(finalized) => block_number <= finalized,
         Timepoint::Timestamp(_) => {
-            let finality = finality_as_blocks(rollup_config);
+            let finality_blocks: u64 = rollup_config.finality_blocks().unpack();
             let tip_number: u64 = prev_global_state.block().count().unpack().saturating_sub(1);
-            block_number.saturating_add(finality) <= tip_number
+            block_number.saturating_add(finality_blocks) <= tip_number
         }
     }
 }
 
 pub fn finality_as_duration(rollup_config: &RollupConfig) -> u64 {
-    match Timepoint::from_full_value(rollup_config.finality_blocks().unpack()) {
-        Timepoint::BlockNumber(block_number) => {
-            block_number.saturating_mul(BLOCK_INTERVAL_IN_MILLISECONDS)
-        }
-        Timepoint::Timestamp(timestamp) => timestamp,
-    }
-}
-
-pub fn finality_as_blocks(rollup_config: &RollupConfig) -> u64 {
-    match Timepoint::from_full_value(rollup_config.finality_blocks().unpack()) {
-        Timepoint::BlockNumber(block_number) => block_number,
-        Timepoint::Timestamp(timestamp) => timestamp / BLOCK_INTERVAL_IN_MILLISECONDS,
-    }
+    let finality_blocks = rollup_config.finality_blocks().unpack();
+    finality_blocks.saturating_mul(BLOCK_INTERVAL_IN_MILLISECONDS)
 }
 
 /// Obtain the max timestamp of the header-deps
diff --git a/contracts/state-validator/src/verifications/revert.rs b/contracts/state-validator/src/verifications/revert.rs
index 469d97c..afe2e40 100644
--- a/contracts/state-validator/src/verifications/revert.rs
+++ b/contracts/state-validator/src/verifications/revert.rs
@@ -8,9 +8,7 @@ use gw_types::{
     packed::{BlockMerkleState, Byte32, GlobalState, RawL2Block, RollupConfig},
     prelude::*,
 };
-use gw_utils::finality::{
-    finality_as_blocks, finality_as_duration, obtain_max_timestamp_of_header_deps,
-};
+use gw_utils::finality::{finality_as_duration, obtain_max_timestamp_of_header_deps};
 use gw_utils::gw_types;
 use gw_utils::{
     cells::{
@@ -255,7 +253,7 @@ fn check_reverted_blocks(
         let tip_number: u64 = reverted_blocks[0].number().unpack();
         let finalized_number = tip_number
             .saturating_sub(1)
-            .saturating_sub(finality_as_blocks(&config));
+            .saturating_sub(config.finality_blocks().unpack());
         Timepoint::from_block_number(finalized_number)
     } else {
         let l1_timestamp = match obtain_max_timestamp_of_header_deps() {
diff --git a/contracts/state-validator/src/verifications/submit_block.rs b/contracts/state-validator/src/verifications/submit_block.rs
index b9e2bc4..6d68786 100644
--- a/contracts/state-validator/src/verifications/submit_block.rs
+++ b/contracts/state-validator/src/verifications/submit_block.rs
@@ -15,9 +15,7 @@ use gw_utils::gw_types::packed::{L2BlockReader, WithdrawalRequestReader};
 // https://nervosnetwork.github.io/ckb-std/riscv64imac-unknown-none-elf/doc/ckb_std/index.html
 use crate::ckb_std::{ckb_constants::Source, debug};
 use gw_state::kv_state::KVState;
-use gw_utils::finality::{
-    finality_as_blocks, finality_as_duration, is_finalized, obtain_max_timestamp_of_header_deps,
-};
+use gw_utils::finality::{finality_as_duration, is_finalized, obtain_max_timestamp_of_header_deps};
 use gw_utils::gw_common::{self, ckb_decimal::CKBCapacity};
 use gw_utils::gw_types::{self, U256};
 
@@ -844,7 +842,9 @@ pub fn verify(
 
         let version: u8 = post_global_state.version().into();
         let last_finalized = if version < 2 {
-            let finalized_number = context.number.saturating_sub(finality_as_blocks(&config));
+            let finalized_number = context
+                .number
+                .saturating_sub(config.finality_blocks().unpack());
             Timepoint::from_block_number(finalized_number)
         } else {
             let l1_timestamp = match obtain_max_timestamp_of_header_deps() {