diff --git a/Lib9c.DPoS.Tests/DistributeTest.cs b/Lib9c.DPoS.Tests/DistributeTest.cs
index 9c50484e87..36b8060e9d 100644
--- a/Lib9c.DPoS.Tests/DistributeTest.cs
+++ b/Lib9c.DPoS.Tests/DistributeTest.cs
@@ -186,14 +186,14 @@ public void ValidatorSetTest()
                     = (validatorRewardSum * 205)
                     .DivRem(100 + (101 + 200) * 50 - 101 - 102 + 204 + 306);
             var (commissionA, _)
-                    = (validatorRewardA * Validator.CommissionNumer)
-                    .DivRem(Validator.CommissionDenom);
+                    = (validatorRewardA * Validator.CommissionNumerator)
+                    .DivRem(Validator.CommissionDenominator);
             var (validatorRewardB, _)
                     = (validatorRewardSum * 307)
                     .DivRem(100 + (101 + 200) * 50 - 101 - 102 + 204 + 306);
             var (commissionB, _)
-                    = (validatorRewardB * Validator.CommissionNumer)
-                    .DivRem(Validator.CommissionDenom);
+                    = (validatorRewardB * Validator.CommissionNumerator)
+                    .DivRem(Validator.CommissionDenominator);
 
             Assert.Equal(
                 Asset.ConsensusToken * 0,
diff --git a/Lib9c.DPoS/Action/DPoSModule.cs b/Lib9c.DPoS/Action/DPoSModule.cs
index c6f7e5e9ea..6e280e9086 100644
--- a/Lib9c.DPoS/Action/DPoSModule.cs
+++ b/Lib9c.DPoS/Action/DPoSModule.cs
@@ -7,9 +7,9 @@ namespace Lib9c.DPoS.Action
 {
     public static class DPoSModule
     {
-        public static IValue? GetDPoSState(this IWorld world, Address address)
+        public static IValue? GetDPoSState(this IWorldState world, Address address)
         {
-            return world.GetAccount(ReservedAddress.DPoSAccountAddress).GetState(address);
+            return world.GetAccountState(ReservedAddress.DPoSAccountAddress).GetState(address);
         }
 
         public static IWorld SetDPoSState(this IWorld world, Address address, IValue value)
diff --git a/Lib9c.DPoS/Control/AllocateReward.cs b/Lib9c.DPoS/Control/AllocateReward.cs
index 6cc0039330..1fac7519a3 100644
--- a/Lib9c.DPoS/Control/AllocateReward.cs
+++ b/Lib9c.DPoS/Control/AllocateReward.cs
@@ -153,8 +153,8 @@ FungibleAssetValue powerDenom
                     = (validatorRewardSum * powerNumer.RawValue)
                     .DivRem(powerDenom.RawValue);
                 var (commission, _)
-                    = (validatorReward * Validator.CommissionNumer)
-                    .DivRem(Validator.CommissionDenom);
+                    = (validatorReward * Validator.CommissionNumerator)
+                    .DivRem(Validator.CommissionDenominator);
 
                 FungibleAssetValue delegationRewardSum = validatorReward - commission;
 
diff --git a/Lib9c.DPoS/Control/DelegateCtrl.cs b/Lib9c.DPoS/Control/DelegateCtrl.cs
index 791bff0be3..11f56036f2 100644
--- a/Lib9c.DPoS/Control/DelegateCtrl.cs
+++ b/Lib9c.DPoS/Control/DelegateCtrl.cs
@@ -13,9 +13,7 @@ namespace Lib9c.DPoS.Control
 {
     internal static class DelegateCtrl
     {
-        internal static Delegation? GetDelegation(
-            IWorld states,
-            Address delegationAddress)
+        internal static Delegation? GetDelegation(IWorldState states, Address delegationAddress)
         {
             if (states.GetDPoSState(delegationAddress) is { } value)
             {
diff --git a/Lib9c.DPoS/Control/RedelegateCtrl.cs b/Lib9c.DPoS/Control/RedelegateCtrl.cs
index ae1eaca279..fd235db5dd 100644
--- a/Lib9c.DPoS/Control/RedelegateCtrl.cs
+++ b/Lib9c.DPoS/Control/RedelegateCtrl.cs
@@ -15,7 +15,7 @@ namespace Lib9c.DPoS.Control
     internal static class RedelegateCtrl
     {
         internal static Redelegation? GetRedelegation(
-            IWorld states,
+            IWorldState states,
             Address redelegationAddress)
         {
             if (states.GetDPoSState(redelegationAddress) is { } value)
diff --git a/Lib9c.DPoS/Control/UnbondingSetCtrl.cs b/Lib9c.DPoS/Control/UnbondingSetCtrl.cs
index aea9974758..06e5d47b6a 100644
--- a/Lib9c.DPoS/Control/UnbondingSetCtrl.cs
+++ b/Lib9c.DPoS/Control/UnbondingSetCtrl.cs
@@ -9,6 +9,16 @@ namespace Lib9c.DPoS.Control
 {
     internal static class UnbondingSetCtrl
     {
+        internal static UnbondingSet? GetUnbondingSet(IWorldState states)
+        {
+            if (states.GetDPoSState(ReservedAddress.UnbondingSet) is { } value)
+            {
+                return new UnbondingSet(value);
+            }
+
+            return null;
+        }
+
         internal static (IWorld, UnbondingSet) FetchUnbondingSet(IWorld states)
         {
             UnbondingSet unbondingSet;
diff --git a/Lib9c.DPoS/Control/UndelegateCtrl.cs b/Lib9c.DPoS/Control/UndelegateCtrl.cs
index 782144ef2e..143f33fc1a 100644
--- a/Lib9c.DPoS/Control/UndelegateCtrl.cs
+++ b/Lib9c.DPoS/Control/UndelegateCtrl.cs
@@ -15,7 +15,7 @@ namespace Lib9c.DPoS.Control
     internal static class UndelegateCtrl
     {
         internal static Undelegation? GetUndelegation(
-            IWorld state,
+            IWorldState state,
             Address undelegationAddress)
         {
             if (state.GetDPoSState(undelegationAddress) is { } value)
diff --git a/Lib9c.DPoS/Control/ValidatorCtrl.cs b/Lib9c.DPoS/Control/ValidatorCtrl.cs
index 3fb6f4189a..0b4e7c32a8 100644
--- a/Lib9c.DPoS/Control/ValidatorCtrl.cs
+++ b/Lib9c.DPoS/Control/ValidatorCtrl.cs
@@ -13,9 +13,7 @@ namespace Lib9c.DPoS.Control
 {
     internal static class ValidatorCtrl
     {
-        internal static Validator? GetValidator(
-            IWorld states,
-            Address validatorAddress)
+        internal static Validator? GetValidator(IWorldState states, Address validatorAddress)
         {
             if (states.GetDPoSState(validatorAddress) is { } value)
             {
diff --git a/Lib9c.DPoS/Control/ValidatorDelegationSetCtrl.cs b/Lib9c.DPoS/Control/ValidatorDelegationSetCtrl.cs
index 967dda206e..7464180764 100644
--- a/Lib9c.DPoS/Control/ValidatorDelegationSetCtrl.cs
+++ b/Lib9c.DPoS/Control/ValidatorDelegationSetCtrl.cs
@@ -7,6 +7,20 @@ namespace Lib9c.DPoS.Control
 {
     internal static class ValidatorDelegationSetCtrl
     {
+        internal static ValidatorDelegationSet? GetValidatorDelegationSet(
+            IWorldState states, Address validatorAddress)
+        {
+            Address validatorDelegationSetAddress = ValidatorDelegationSet.DeriveAddress(
+                validatorAddress);
+
+            if (states.GetDPoSState(validatorDelegationSetAddress) is { } value)
+            {
+                return new ValidatorDelegationSet(value);
+            }
+
+            return null;
+        }
+
         internal static (IWorld, ValidatorDelegationSet) FetchValidatorDelegationSet(
             IWorld states, Address validatorAddress)
         {
diff --git a/Lib9c.DPoS/Control/ValidatorPowerIndexCtrl.cs b/Lib9c.DPoS/Control/ValidatorPowerIndexCtrl.cs
index fee7a3640c..1d4bd558eb 100644
--- a/Lib9c.DPoS/Control/ValidatorPowerIndexCtrl.cs
+++ b/Lib9c.DPoS/Control/ValidatorPowerIndexCtrl.cs
@@ -11,8 +11,17 @@ namespace Lib9c.DPoS.Control
 {
     internal static class ValidatorPowerIndexCtrl
     {
-        internal static (IWorld, ValidatorPowerIndex) FetchValidatorPowerIndex(
-            IWorld states)
+        internal static ValidatorPowerIndex? GetValidatorPowerIndex(IWorldState states)
+        {
+            if (states.GetDPoSState(ReservedAddress.ValidatorPowerIndex) is { } value)
+            {
+                return new ValidatorPowerIndex(value);
+            }
+
+            return null;
+        }
+
+        internal static (IWorld, ValidatorPowerIndex) FetchValidatorPowerIndex(IWorld states)
         {
             ValidatorPowerIndex validatorPowerIndex;
             if (states.GetDPoSState(ReservedAddress.ValidatorPowerIndex) is { } value)
diff --git a/Lib9c.DPoS/Control/ValidatorRewardsCtrl.cs b/Lib9c.DPoS/Control/ValidatorRewardsCtrl.cs
index ef001fef83..3a5999c5c0 100644
--- a/Lib9c.DPoS/Control/ValidatorRewardsCtrl.cs
+++ b/Lib9c.DPoS/Control/ValidatorRewardsCtrl.cs
@@ -10,7 +10,7 @@ namespace Lib9c.DPoS.Control
     internal static class ValidatorRewardsCtrl
     {
         internal static ValidatorRewards? GetValidatorRewards(
-            IWorld states,
+            IWorldState states,
             Address validatorAddress)
         {
             if (states.GetDPoSState(validatorAddress) is { } value)
diff --git a/Lib9c.DPoS/Control/ValidatorSetCtrl.cs b/Lib9c.DPoS/Control/ValidatorSetCtrl.cs
index 8230662c8f..3efb68c792 100644
--- a/Lib9c.DPoS/Control/ValidatorSetCtrl.cs
+++ b/Lib9c.DPoS/Control/ValidatorSetCtrl.cs
@@ -11,6 +11,16 @@ namespace Lib9c.DPoS.Control
 {
     internal static class ValidatorSetCtrl
     {
+        internal static ValidatorSet? GetValidatorSet(IWorldState states, Address address)
+        {
+            if (states.GetDPoSState(address) is { } value)
+            {
+                return new ValidatorSet(value);
+            }
+
+            return null;
+        }
+
         internal static (IWorld, ValidatorSet) FetchValidatorSet(IWorld states, Address address)
         {
             ValidatorSet validatorSet;
diff --git a/Lib9c.DPoS/Model/Validator.cs b/Lib9c.DPoS/Model/Validator.cs
index da84e75b83..6a56745ffc 100644
--- a/Lib9c.DPoS/Model/Validator.cs
+++ b/Lib9c.DPoS/Model/Validator.cs
@@ -43,9 +43,9 @@ public Validator(IValue serialized)
         // May be it would be better to be serialized
         public static FungibleAssetValue MinSelfDelegation => Asset.ConsensusToken * 1;
 
-        public static BigInteger CommissionNumer => 1;
+        public static BigInteger CommissionNumerator => 1;
 
-        public static BigInteger CommissionDenom => 10;
+        public static BigInteger CommissionDenominator => 10;
 
         public static double CommissionMaxRate => 0.2;
 
diff --git a/Lib9c.sln.DotSettings b/Lib9c.sln.DotSettings
index f0ba53d29f..a8a315c16f 100644
--- a/Lib9c.sln.DotSettings
+++ b/Lib9c.sln.DotSettings
@@ -10,8 +10,12 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Mimisbrunnr/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Minterless/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Nekoyume/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Redelegation/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=RUNESTONE/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Soulstone/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Tradable/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=unbonded/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Unbonding/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Undelegation/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Unequip/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=unrender/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>
\ No newline at end of file