diff --git a/.gitignore b/.gitignore
index acc79fb4..7d39da08 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@
 tests/nodes/.ports
 /coverage-report
 /*.info
+.vscode
diff --git a/src/fiber/channel.rs b/src/fiber/channel.rs
index d207c03c..b0dfdc0d 100644
--- a/src/fiber/channel.rs
+++ b/src/fiber/channel.rs
@@ -1669,7 +1669,7 @@ where
                     commitment_fee_rate.unwrap_or(DEFAULT_COMMITMENT_FEE_RATE);
                 let funding_fee_rate = funding_fee_rate.unwrap_or(DEFAULT_FEE_RATE);
 
-                let (funding_amount, reserved_ckb_amount) = get_funding_and_reserved_amount(
+                let (to_local_amount, reserved_ckb_amount) = get_funding_and_reserved_amount(
                     funding_amount,
                     &shutdown_script,
                     &funding_udt_type_script,
@@ -1680,7 +1680,7 @@ where
                     &seed,
                     self.get_local_pubkey(),
                     self.get_remote_pubkey(),
-                    funding_amount,
+                    to_local_amount,
                     reserved_ckb_amount,
                     commitment_fee_rate,
                     commitment_delay_epoch
@@ -2337,31 +2337,28 @@ pub fn get_commitment_point(commitment_seed: &[u8; 32], commitment_number: u64)
 }
 
 pub(crate) fn get_funding_and_reserved_amount(
-    funding_amount: u128,
+    total_amount: u128,
     shutdown_script: &Script,
     udt_type_script: &Option<Script>,
 ) -> Result<(u128, u64), ProcessingChannelError> {
     let reserved_capacity = reserved_capacity(shutdown_script, udt_type_script)?.as_u64();
     if udt_type_script.is_none() {
-        if funding_amount < reserved_capacity as u128 {
+        if total_amount < reserved_capacity as u128 {
             return Err(ProcessingChannelError::InvalidParameter(format!(
                 "The funding amount ({}) should be greater than or equal to {}",
-                funding_amount, reserved_capacity
+                total_amount, reserved_capacity
             )));
         }
-        if funding_amount >= u64::MAX as u128 {
+        if total_amount >= u64::MAX as u128 {
             return Err(ProcessingChannelError::InvalidParameter(format!(
                 "The funding amount ({}) should be less than {}",
-                funding_amount,
+                total_amount,
                 u64::MAX
             )));
         }
-        Ok((
-            funding_amount - reserved_capacity as u128,
-            reserved_capacity,
-        ))
+        Ok((total_amount - reserved_capacity as u128, reserved_capacity))
     } else {
-        Ok((funding_amount, reserved_capacity))
+        Ok((total_amount, reserved_capacity))
     }
 }
 
@@ -2799,7 +2796,7 @@ impl ChannelActorState {
         seed: &[u8],
         local_pubkey: Pubkey,
         remote_pubkey: Pubkey,
-        value: u128,
+        to_local_amount: u128,
         local_reserved_ckb_amount: u64,
         commitment_fee_rate: u64,
         commitment_delay_epoch: u64,
@@ -2821,7 +2818,7 @@ impl ChannelActorState {
             funding_tx_confirmed_at: None,
             funding_udt_type_script,
             is_acceptor: false,
-            to_local_amount: value,
+            to_local_amount,
             to_remote_amount: 0,
             commitment_fee_rate,
             commitment_delay_epoch,
diff --git a/src/fiber/config.rs b/src/fiber/config.rs
index 245f3a6c..6f3be140 100644
--- a/src/fiber/config.rs
+++ b/src/fiber/config.rs
@@ -11,24 +11,19 @@ use std::{fs, path::PathBuf, str::FromStr};
 use tentacle::secio::{PublicKey, SecioKeyPair};
 
 pub const CKB_SHANNONS: u64 = 100_000_000; // 1 CKB = 10 ^ 8 shannons
-pub const DEFAULT_MIN_INBOUND_LIQUIDITY: u64 = 100 * CKB_SHANNONS; // 100 CKB for minimal inbound liquidity
 pub const DEFAULT_MIN_SHUTDOWN_FEE: u64 = 1 * CKB_SHANNONS; // 1 CKB prepared for shutdown transaction fee
-pub const MIN_OCCUPIED_CAPACITY: u64 = 61 * CKB_SHANNONS; // 61 CKB for occupied capacity
 
 /// By default, listen to any tcp port allocated by the kernel.
 pub const DEFAULT_LISTENING_ADDR: &str = "/ip4/0.0.0.0/tcp/0";
 
-/// 62 CKB minimal channel amount, at any time a partner should keep at least
-/// `DEFAULT_CHANNEL_MINIMAL_CKB_AMOUNT` CKB in the channel,
-/// to make sure he can build a valid shutdown transaction and pay proper fee.
-pub const DEFAULT_CHANNEL_MINIMAL_CKB_AMOUNT: u64 =
+const MIN_OCCUPIED_CAPACITY: u64 = 61 * CKB_SHANNONS; // 61 CKB for occupied capacity
+
+/// Default ckb funding amount when auto accepting an open channel request.
+pub const DEFAULT_AUTO_ACCEPT_CHANNEL_CKB_FUNDING_AMOUNT: u64 =
     MIN_OCCUPIED_CAPACITY + DEFAULT_MIN_SHUTDOWN_FEE;
 
-/// 162 CKB to open a channel which maybe automatically acceptted.
-/// 100 CKB for minimal inbound liquidity, 61 CKB for occupied capacity, 1 CKB for shutdown fee
-/// The other party may auto accept the channel if the amount is greater than this.
-pub const DEFAULT_CHANNEL_MIN_AUTO_CKB_AMOUNT: u64 =
-    DEFAULT_MIN_INBOUND_LIQUIDITY + MIN_OCCUPIED_CAPACITY + DEFAULT_MIN_SHUTDOWN_FEE;
+/// Default minimum ckb funding amount for auto accepting an open channel request.
+pub const DEFAULT_OPEN_CHANNEL_AUTO_ACCEPT_MIN_CKB_FUNDING_AMOUNT: u64 = 100 * CKB_SHANNONS;
 
 /// The expiry delta to forward a tlc, in milliseconds, default to 1 day.
 pub const DEFAULT_TLC_EXPIRY_DELTA: u64 = 24 * 60 * 60 * 1000;
@@ -108,12 +103,12 @@ pub struct FiberConfig {
     #[arg(name = "FIBER_SCRIPTS", long = "fiber-scripts", env, value_parser, num_args = 0.., value_delimiter = ',')]
     pub scripts: Vec<FiberScript>,
 
-    /// minimum ckb funding amount for auto accepting an open channel requests, aunit: shannons [default: 16200000000 shannons]
+    /// minimum ckb funding amount for auto accepting an open channel requests, aunit: shannons [default: 10000000000 shannons]
     #[arg(
         name = "FIBER_OPEN_CHANNEL_AUTO_ACCEPT_MIN_CKB_FUNDING_AMOUNT",
         long = "fiber-open-channel-auto-accept-min-ckb-funding-amount",
         env,
-        help = "minimum ckb funding amount for auto accepting an open channel requests, unit: shannons [default: 16200000000 shannons]"
+        help = "minimum ckb funding amount for auto accepting an open channel requests, unit: shannons [default: 10000000000 shannons]"
     )]
     pub open_channel_auto_accept_min_ckb_funding_amount: Option<u64>,
     /// whether to accept open channel requests with ckb funding amount automatically, unit: shannons [default: 6200000000 shannons], if this is set to zero, it means to disable auto accept
@@ -313,12 +308,12 @@ impl FiberConfig {
 
     pub fn open_channel_auto_accept_min_ckb_funding_amount(&self) -> u64 {
         self.open_channel_auto_accept_min_ckb_funding_amount
-            .unwrap_or(DEFAULT_CHANNEL_MIN_AUTO_CKB_AMOUNT)
+            .unwrap_or(DEFAULT_OPEN_CHANNEL_AUTO_ACCEPT_MIN_CKB_FUNDING_AMOUNT)
     }
 
     pub fn auto_accept_channel_ckb_funding_amount(&self) -> u64 {
         self.auto_accept_channel_ckb_funding_amount
-            .unwrap_or(DEFAULT_CHANNEL_MINIMAL_CKB_AMOUNT)
+            .unwrap_or(DEFAULT_AUTO_ACCEPT_CHANNEL_CKB_FUNDING_AMOUNT)
     }
 
     pub fn tlc_expiry_delta(&self) -> u64 {
diff --git a/src/fiber/network.rs b/src/fiber/network.rs
index 12162613..84c08ab2 100644
--- a/src/fiber/network.rs
+++ b/src/fiber/network.rs
@@ -665,8 +665,8 @@ where
                             is_udt_type_auto_accept(udt_type_script, open_channel.funding_amount)
                         } else {
                             state.auto_accept_channel_ckb_funding_amount > 0
-                                && open_channel.all_ckb_amount()
-                                    >= state.open_channel_auto_accept_min_ckb_funding_amount
+                                && open_channel.funding_amount
+                                    >= state.open_channel_auto_accept_min_ckb_funding_amount as u128
                         };
                         if auto_accept {
                             let accept_channel = AcceptChannelCommand {
@@ -3000,12 +3000,6 @@ where
         }
         let shutdown_script =
             shutdown_script.unwrap_or_else(|| self.default_shutdown_script.clone());
-        // NOTE: here we only check the amount is valid, we will also check more in the `pre_start` from channel creation
-        let (_funding_amount, _reserved_ckb_amount) = get_funding_and_reserved_amount(
-            funding_amount,
-            &shutdown_script,
-            &funding_udt_type_script,
-        )?;
 
         let seed = self.generate_channel_seed();
         let (tx, rx) = oneshot::channel::<Hash256>();
diff --git a/src/fiber/tests/channel.rs b/src/fiber/tests/channel.rs
index cfb422a5..d0843c86 100644
--- a/src/fiber/tests/channel.rs
+++ b/src/fiber/tests/channel.rs
@@ -1,8 +1,8 @@
 use crate::fiber::graph::PaymentSessionStatus;
 use crate::fiber::network::SendPaymentCommand;
-use crate::fiber::tests::test_utils::gen_rand_public_key;
-use crate::fiber::tests::test_utils::gen_sha256_hash;
-
+use crate::fiber::tests::test_utils::{
+    gen_rand_public_key, gen_sha256_hash, NetworkNodeConfigBuilder,
+};
 use crate::{
     ckb::contracts::{get_cell_deps, Contract},
     fiber::{
@@ -11,7 +11,7 @@ use crate::{
             ChannelCommand, ChannelCommandWithId, InMemorySigner, RemoveTlcCommand,
             ShutdownCommand, DEFAULT_COMMITMENT_FEE_RATE,
         },
-        config::DEFAULT_CHANNEL_MINIMAL_CKB_AMOUNT,
+        config::DEFAULT_AUTO_ACCEPT_CHANNEL_CKB_FUNDING_AMOUNT,
         graph::NetworkGraphStateStore,
         hash_algorithm::HashAlgorithm,
         network::{AcceptChannelCommand, OpenChannelCommand},
@@ -138,7 +138,7 @@ async fn test_open_and_accept_channel() {
         NetworkActorMessage::Command(NetworkActorCommand::AcceptChannel(
             AcceptChannelCommand {
                 temp_channel_id: open_channel_result.channel_id,
-                funding_amount: DEFAULT_CHANNEL_MINIMAL_CKB_AMOUNT as u128,
+                funding_amount: DEFAULT_AUTO_ACCEPT_CHANNEL_CKB_FUNDING_AMOUNT as u128,
                 shutdown_script: None,
             },
             rpc_reply,
@@ -1670,10 +1670,25 @@ async fn test_connect_to_peers_with_mutual_channel_on_restart_version_2() {
 }
 
 #[tokio::test]
+#[should_panic(expected = "Waiting for event timeout")]
 async fn test_open_channel_with_large_size_shutdown_script() {
-    init_tracing();
-    let [node_a, mut node_b] = NetworkNode::new_n_interconnected_nodes().await;
+    let mut nodes = NetworkNode::new_n_interconnected_nodes_with_config(2, |i| {
+        NetworkNodeConfigBuilder::new()
+            .node_name(Some(format!("node-{}", i)))
+            .base_dir_prefix(&format!("fnn-test-node-{}-", i))
+            .fiber_config_updater(|config| {
+                // enable auto accept channel with default value
+                config.auto_accept_channel_ckb_funding_amount = Some(6200000000);
+                config.open_channel_auto_accept_min_ckb_funding_amount = Some(16200000000);
+            })
+            .build()
+    })
+    .await;
 
+    let mut node_a = nodes.pop().unwrap();
+    let mut node_b = nodes.pop().unwrap();
+
+    // test open channel with large size shutdown script
     let message = |rpc_reply| {
         NetworkActorMessage::Command(NetworkActorCommand::OpenChannel(
             OpenChannelCommand {
@@ -1702,4 +1717,58 @@ async fn test_open_channel_with_large_size_shutdown_script() {
         .err()
         .unwrap()
         .contains("The funding amount (8199999999) should be greater than or equal to 8200000000"));
+
+    // test auto accept channel with large size shutdown script
+    let message = |rpc_reply| {
+        NetworkActorMessage::Command(NetworkActorCommand::OpenChannel(
+            OpenChannelCommand {
+                peer_id: node_b.peer_id.clone(),
+                public: false,
+                shutdown_script: Some(Script::new_builder().args(vec![0u8; 40].pack()).build()),
+                funding_amount: (81 + 1 + 90) * 100000000,
+                funding_udt_type_script: None,
+                commitment_fee_rate: None,
+                commitment_delay_epoch: None,
+                funding_fee_rate: None,
+                tlc_expiry_delta: None,
+                tlc_min_value: None,
+                tlc_max_value: None,
+                tlc_fee_proportional_millionths: None,
+                max_tlc_number_in_flight: None,
+                max_tlc_value_in_flight: None,
+            },
+            rpc_reply,
+        ))
+    };
+
+    let open_channel_result = call!(node_a.network_actor, message)
+        .expect("node_a alive")
+        .expect("open channel success");
+
+    node_b
+        .expect_event(|event| match event {
+            NetworkServiceEvent::ChannelPendingToBeAccepted(peer_id, channel_id) => {
+                println!("A channel ({:?}) to {:?} create", channel_id, peer_id);
+                assert_eq!(channel_id, &open_channel_result.channel_id);
+                assert_eq!(peer_id, &node_a.peer_id);
+                true
+            }
+            _ => false,
+        })
+        .await;
+
+    // should panic
+    node_a
+        .expect_event(|event| match event {
+            NetworkServiceEvent::ChannelReady(peer_id, channel_id, _funding_tx_hash) => {
+                println!(
+                    "A channel ({:?}) to {:?} is now ready",
+                    &channel_id, &peer_id
+                );
+                assert_eq!(peer_id, &node_b.peer_id);
+                true
+            }
+            _ => false,
+        })
+        .await;
 }
diff --git a/src/fiber/types.rs b/src/fiber/types.rs
index 00702ccc..f83dcabf 100644
--- a/src/fiber/types.rs
+++ b/src/fiber/types.rs
@@ -566,14 +566,6 @@ pub struct OpenChannel {
 }
 
 impl OpenChannel {
-    pub fn all_ckb_amount(&self) -> u64 {
-        if self.funding_udt_type_script.is_none() {
-            self.funding_amount as u64 + self.reserved_ckb_amount
-        } else {
-            self.reserved_ckb_amount
-        }
-    }
-
     pub fn is_public(&self) -> bool {
         self.channel_flags.contains(ChannelFlags::PUBLIC)
     }