diff --git a/abi/decoder/src/lib.rs b/abi/decoder/src/lib.rs
index 8b9a5a3155..0651998a0b 100644
--- a/abi/decoder/src/lib.rs
+++ b/abi/decoder/src/lib.rs
@@ -12,7 +12,7 @@ use starcoin_resource_viewer::{AnnotatedMoveStruct, AnnotatedMoveValue};
 use starcoin_vm_types::account_address::AccountAddress;
 use starcoin_vm_types::identifier::Identifier;
 use starcoin_vm_types::language_storage::{ModuleId, TypeTag};
-use starcoin_vm_types::state_view::StateView;
+use starcoin_vm_types::state_store::StateView;
 use starcoin_vm_types::transaction::{Module, Package, Script, ScriptFunction, TransactionPayload};
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub enum DecodedTransactionPayload {
diff --git a/abi/resolver/src/lib.rs b/abi/resolver/src/lib.rs
index 033c1b9c73..af328230c9 100644
--- a/abi/resolver/src/lib.rs
+++ b/abi/resolver/src/lib.rs
@@ -17,7 +17,7 @@ use starcoin_vm_types::file_format::{
 use starcoin_vm_types::identifier::{IdentStr, Identifier};
 use starcoin_vm_types::language_storage::{ModuleId, StructTag, TypeTag};
 use starcoin_vm_types::normalized::{Function, Module, Struct, Type};
-use starcoin_vm_types::state_view::StateView;
+use starcoin_vm_types::state_store::StateView;
 
 #[allow(clippy::upper_case_acronyms)]
 pub struct ABIResolver<'a> {
diff --git a/vm/resource-viewer/src/lib.rs b/vm/resource-viewer/src/lib.rs
index 7c6d00b72e..c0b801b44f 100644
--- a/vm/resource-viewer/src/lib.rs
+++ b/vm/resource-viewer/src/lib.rs
@@ -12,9 +12,9 @@ use anyhow::{anyhow, Result};
 use move_core_types::u256;
 use starcoin_vm_types::language_storage::TypeTag;
 use starcoin_vm_types::state_store::state_key::StateKey;
+use starcoin_vm_types::state_store::state_storage_usage::StateStorageUsage;
 use starcoin_vm_types::state_store::state_value::StateValue;
-use starcoin_vm_types::state_store::TStateView;
-use starcoin_vm_types::state_view::StateView;
+use starcoin_vm_types::state_store::{StateView, TStateView};
 use starcoin_vm_types::value::MoveTypeLayout;
 use starcoin_vm_types::{
     account_address::AccountAddress,
@@ -30,7 +30,6 @@ use std::{
     convert::TryInto,
     fmt::{Display, Formatter},
 };
-use starcoin_vm_types::state_store::state_storage_usage::StateStorageUsage;
 
 mod fat_type;
 pub mod module_cache;
@@ -318,11 +317,14 @@ pub struct NullStateView;
 impl TStateView for NullStateView {
     type Key = StateKey;
 
-    fn get_state_value(&self, _state_key: &StateKey) -> starcoin_vm_types::state_store::Result<Option<StateValue>> {
+    fn get_state_value(
+        &self,
+        _state_key: &StateKey,
+    ) -> starcoin_vm_types::state_store::Result<Option<StateValue>> {
         Ok(None)
     }
 
     fn get_usage(&self) -> starcoin_vm_types::state_store::Result<StateStorageUsage> {
-        unimplemented!()
+        unimplemented!("get_usage not implemented for NullStateView")
     }
 }
diff --git a/vm/resource-viewer/src/resolver.rs b/vm/resource-viewer/src/resolver.rs
index 21baab51be..a66375b495 100644
--- a/vm/resource-viewer/src/resolver.rs
+++ b/vm/resource-viewer/src/resolver.rs
@@ -9,7 +9,6 @@ use crate::{
     module_cache::ModuleCache,
 };
 use anyhow::{anyhow, Result};
-use starcoin_vm_types::state_store::state_key::StateKey;
 use starcoin_vm_types::{
     access::ModuleAccess,
     account_address::AccountAddress,
@@ -20,7 +19,7 @@ use starcoin_vm_types::{
     },
     identifier::{IdentStr, Identifier},
     language_storage::{ModuleId, StructTag, TypeTag},
-    state_view::StateView,
+    state_store::{state_key::StateKey, StateView},
 };
 use std::rc::Rc;
 
diff --git a/vm/starcoin-aggregator/src/resolver.rs b/vm/starcoin-aggregator/src/resolver.rs
index c6fa4744d1..4bf00e2b57 100644
--- a/vm/starcoin-aggregator/src/resolver.rs
+++ b/vm/starcoin-aggregator/src/resolver.rs
@@ -19,8 +19,8 @@ use starcoin_vm_types::{
     state_store::{
         state_key::StateKey,
         state_value::{StateValue, StateValueMetadata},
+        StateView,
     },
-    state_view::StateView,
     write_set::WriteOp,
 };
 use std::fmt::Debug;
diff --git a/vm/types/src/on_chain_config/mod.rs b/vm/types/src/on_chain_config/mod.rs
index 7cc0af2317..2aa7a979c5 100644
--- a/vm/types/src/on_chain_config/mod.rs
+++ b/vm/types/src/on_chain_config/mod.rs
@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 use crate::account_config::genesis_address;
-use crate::state_view::StateView;
+use crate::state_store::StateView;
 use crate::{
     access_path::AccessPath,
     account_address::AccountAddress,
diff --git a/vm/types/src/state_store/mod.rs b/vm/types/src/state_store/mod.rs
index 385e6beb1f..8373380a9d 100644
--- a/vm/types/src/state_store/mod.rs
+++ b/vm/types/src/state_store/mod.rs
@@ -5,7 +5,6 @@ use crate::state_store::{
     errors::StateviewError, in_memory_state_view::InMemoryStateView, state_key::StateKey,
     state_storage_usage::StateStorageUsage, state_value::StateValue,
 };
-use crate::state_view::StateView;
 use crate::transaction::Version;
 use arr_macro::arr;
 use bytes::Bytes;
@@ -50,6 +49,10 @@ pub trait TStateView {
     }
 }
 
+pub trait StateView: TStateView<Key = StateKey> {}
+
+impl<T: TStateView<Key = StateKey>> StateView for T {}
+
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum StateViewId {
     // XXX FIXME YSG should remove
diff --git a/vm/types/src/state_view.rs b/vm/types/src/state_view.rs
index 20ce541ac4..afa9f81c94 100644
--- a/vm/types/src/state_view.rs
+++ b/vm/types/src/state_view.rs
@@ -9,7 +9,7 @@
 //! This crate defines [`trait StateView`](StateView).
 
 use crate::state_store::state_key::StateKey;
-use crate::state_store::TStateView;
+use crate::state_store::StateView;
 use crate::{
     account_config::{
         genesis_address, token_code::TokenCode, AccountResource, BalanceResource, TokenInfo,
@@ -31,10 +31,6 @@ use move_core_types::{
     language_storage::{ModuleId, StructTag},
 };
 
-pub trait StateView: TStateView<Key = StateKey> {}
-
-impl<T: TStateView<Key = StateKey>> StateView for T {}
-
 impl<T: ?Sized> StateReaderExt for T where T: StateView {}
 
 pub trait StateReaderExt: StateView {