diff --git a/Lib9c/Action/DPoS/DPoSBeginBlockAction.cs b/Lib9c/Action/DPoS/DPoSBeginBlockAction.cs
new file mode 100644
index 0000000000..f353c4436e
--- /dev/null
+++ b/Lib9c/Action/DPoS/DPoSBeginBlockAction.cs
@@ -0,0 +1,51 @@
+using System.Collections.Immutable;
+using Bencodex.Types;
+using Libplanet.Action;
+using Libplanet.Action.State;
+using Nekoyume.Action.DPoS.Control;
+using Nekoyume.Action.DPoS.Misc;
+using Nekoyume.Action.DPoS.Model;
+using Nekoyume.Module;
+
+namespace Nekoyume.Action.DPoS
+{
+    /// <summary>
+    /// A BeginBlock action for DPoS that updates <see cref="ValidatorSet"/>.
+    /// </summary>
+    public sealed class DPoSBeginBlockAction : ActionBase
+    {
+        /// <summary>
+        /// Creates a new instance of <see cref="DPoSBeginBlockAction"/>.
+        /// </summary>
+        public DPoSBeginBlockAction()
+        {
+        }
+
+       /// <inheritdoc cref="IAction.PlainValue"/>
+        public override IValue PlainValue => new Bencodex.Types.Boolean(true);
+
+        /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
+        public override void LoadPlainValue(IValue plainValue)
+        {
+            // Method intentionally left empty.
+        }
+
+        /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
+        public override IWorld Execute(IActionContext context)
+        {
+            var states = context.PreviousState;
+
+            // Allocate reward
+            var nativeTokens = ImmutableHashSet.Create(
+                Asset.GovernanceToken, Asset.ConsensusToken, Asset.Share);
+            states = AllocateReward.Execute(
+                states,
+                context,
+                nativeTokens,
+                context.LastCommit?.Votes,
+                context.Miner);
+
+            return states;
+        }
+    }
+}
diff --git a/Lib9c/Action/DPoS/DPoSEndBlockAction.cs b/Lib9c/Action/DPoS/DPoSEndBlockAction.cs
new file mode 100644
index 0000000000..a0179f7e5f
--- /dev/null
+++ b/Lib9c/Action/DPoS/DPoSEndBlockAction.cs
@@ -0,0 +1,53 @@
+using System.Collections.Immutable;
+using Bencodex.Types;
+using Libplanet.Action;
+using Libplanet.Action.State;
+using Nekoyume.Action.DPoS.Control;
+using Nekoyume.Action.DPoS.Misc;
+using Nekoyume.Action.DPoS.Model;
+using Nekoyume.Module;
+
+namespace Nekoyume.Action.DPoS
+{
+    /// <summary>
+    /// A EndBlock action for DPoS that updates <see cref="ValidatorSet"/>.
+    /// </summary>
+    public sealed class DPoSEndBlockAction : ActionBase
+    {
+        /// <summary>
+        /// Creates a new instance of <see cref="DPoSBeginBlockAction"/>.
+        /// </summary>
+        public DPoSEndBlockAction()
+        {
+        }
+
+       /// <inheritdoc cref="IAction.PlainValue"/>
+        public override IValue PlainValue => new Bencodex.Types.Boolean(true);
+
+        /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
+        public override void LoadPlainValue(IValue plainValue)
+        {
+            // Method intentionally left empty.
+        }
+
+        /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
+        public override IWorld Execute(IActionContext context)
+        {
+            var states = context.PreviousState;
+
+            // Update ValidatorSet
+            states = ValidatorSetCtrl.Update(states, context);
+            ValidatorSet bondedSet;
+            (states, bondedSet) = ValidatorSetCtrl.FetchBondedValidatorSet(states);
+            foreach (var validator in bondedSet.Set)
+            {
+                states = states.SetValidator(
+                    new Libplanet.Types.Consensus.Validator(
+                        validator.OperatorPublicKey,
+                        validator.ConsensusToken.RawValue));
+            }
+
+            return states;
+        }
+    }
+}
diff --git a/Lib9c/Action/DPoS/PoSAction.cs b/Lib9c/Action/DPoS/PoSAction.cs
deleted file mode 100644
index e11f525a0f..0000000000
--- a/Lib9c/Action/DPoS/PoSAction.cs
+++ /dev/null
@@ -1,65 +0,0 @@
-using System.Collections.Immutable;
-using Bencodex.Types;
-using Libplanet.Action;
-using Libplanet.Action.State;
-using Nekoyume.Action.DPoS.Control;
-using Nekoyume.Action.DPoS.Misc;
-using Nekoyume.Action.DPoS.Model;
-using Nekoyume.Module;
-
-namespace Nekoyume.Action.DPoS
-{
-    /// <summary>
-    /// A block action for DPoS that updates <see cref="ValidatorSet"/>.
-    /// </summary>
-    public sealed class PoSAction : IAction
-    {
-        /// <summary>
-        /// Creates a new instance of <see cref="PoSAction"/>.
-        /// </summary>
-        public PoSAction()
-        {
-        }
-
-       /// <inheritdoc cref="IAction.PlainValue"/>
-        public IValue PlainValue => new Bencodex.Types.Boolean(true);
-
-        /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
-        public void LoadPlainValue(IValue plainValue)
-        {
-            // Method intentionally left empty.
-        }
-
-        /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
-        public IWorld Execute(IActionContext context)
-        {
-            IActionContext ctx = context;
-            var states = ctx.PreviousState;
-
-            // if (ctx.Rehearsal)
-            // Rehearsal mode is not implemented
-            states = ValidatorSetCtrl.Update(states, ctx);
-            var nativeTokens = ImmutableHashSet.Create(
-                Asset.GovernanceToken, Asset.ConsensusToken, Asset.Share);
-
-            states = AllocateReward.Execute(
-                states,
-                ctx,
-                nativeTokens,
-                ctx.LastCommit?.Votes,
-                ctx.Miner);
-
-            // Endblock, Update ValidatorSet
-            var bondedSet = ValidatorSetCtrl.FetchBondedValidatorSet(states).Item2.Set;
-            foreach (var validator in bondedSet)
-            {
-                states = states.SetValidator(
-                    new Libplanet.Types.Consensus.Validator(
-                        validator.OperatorPublicKey,
-                        validator.ConsensusToken.RawValue));
-            }
-
-            return states;
-        }
-    }
-}
diff --git a/Lib9c/Action/DPoS/Sys/CancelUndelegation.cs b/Lib9c/Action/DPoS/Sys/CancelUndelegation.cs
index 9e0fd4268d..b174a8f8d8 100644
--- a/Lib9c/Action/DPoS/Sys/CancelUndelegation.cs
+++ b/Lib9c/Action/DPoS/Sys/CancelUndelegation.cs
@@ -16,7 +16,7 @@ namespace Nekoyume.Action.DPoS.Sys
     /// <see cref="Amount"/> of tokens to a given <see cref="Validator"/>.
     /// </summary>
     [ActionType(ActionTypeValue)]
-    public sealed class CancelUndelegation : IAction
+    public sealed class CancelUndelegation : ActionBase
     {
         private const string ActionTypeValue = "cancel_undelegation";
 
@@ -49,13 +49,13 @@ public CancelUndelegation()
         public FungibleAssetValue Amount { get; set; }
 
         /// <inheritdoc cref="IAction.PlainValue"/>
-        public IValue PlainValue => Bencodex.Types.Dictionary.Empty
+        public override IValue PlainValue => Bencodex.Types.Dictionary.Empty
             .Add("type_id", new Text(ActionTypeValue))
             .Add("validator", Validator.Serialize())
             .Add("amount", Amount.Serialize());
 
         /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
-        public void LoadPlainValue(IValue plainValue)
+        public override void LoadPlainValue(IValue plainValue)
         {
             var dict = (Bencodex.Types.Dictionary)plainValue;
             Validator = dict["validator"].ToAddress();
@@ -63,7 +63,7 @@ public void LoadPlainValue(IValue plainValue)
         }
 
         /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
-        public IWorld Execute(IActionContext context)
+        public override IWorld Execute(IActionContext context)
         {
             IActionContext ctx = context;
             var states = ctx.PreviousState;
diff --git a/Lib9c/Action/DPoS/Sys/Delegate.cs b/Lib9c/Action/DPoS/Sys/Delegate.cs
index c05fa2e419..2cffc1a716 100644
--- a/Lib9c/Action/DPoS/Sys/Delegate.cs
+++ b/Lib9c/Action/DPoS/Sys/Delegate.cs
@@ -15,7 +15,7 @@ namespace Nekoyume.Action.DPoS.Sys
     /// of tokens to a given <see cref="Validator"/>.
     /// </summary>
     [ActionType(ActionTypeValue)]
-    public sealed class Delegate : IAction
+    public sealed class Delegate : ActionBase
     {
         private const string ActionTypeValue = "delegate";
 
@@ -44,13 +44,13 @@ public Delegate()
         public FungibleAssetValue Amount { get; set; }
 
         /// <inheritdoc cref="IAction.PlainValue"/>
-        public IValue PlainValue => Bencodex.Types.Dictionary.Empty
+        public override IValue PlainValue => Bencodex.Types.Dictionary.Empty
             .Add("type_id", new Text(ActionTypeValue))
             .Add("validator", Validator.Serialize())
             .Add("amount", Amount.Serialize());
 
         /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
-        public void LoadPlainValue(IValue plainValue)
+        public override void LoadPlainValue(IValue plainValue)
         {
             var dict = (Bencodex.Types.Dictionary)plainValue;
             Validator = dict["validator"].ToAddress();
@@ -58,7 +58,7 @@ public void LoadPlainValue(IValue plainValue)
         }
 
         /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
-        public IWorld Execute(IActionContext context)
+        public override IWorld Execute(IActionContext context)
         {
             IActionContext ctx = context;
             var states = ctx.PreviousState;
diff --git a/Lib9c/Action/DPoS/Sys/PromoteValidator.cs b/Lib9c/Action/DPoS/Sys/PromoteValidator.cs
index fdd3bfbc0c..90e00121ca 100644
--- a/Lib9c/Action/DPoS/Sys/PromoteValidator.cs
+++ b/Lib9c/Action/DPoS/Sys/PromoteValidator.cs
@@ -15,7 +15,7 @@ namespace Nekoyume.Action.DPoS.Sys
     /// A system action for DPoS that promotes non-validator node to a validator.
     /// </summary>
     [ActionType(ActionTypeValue)]
-    public sealed class PromoteValidator : IAction
+    public sealed class PromoteValidator : ActionBase
     {
         private const string ActionTypeValue = "promote_validator";
 
@@ -50,13 +50,13 @@ public PromoteValidator()
         public FungibleAssetValue Amount { get; set; }
 
         /// <inheritdoc cref="IAction.PlainValue"/>
-        public IValue PlainValue => Bencodex.Types.Dictionary.Empty
+        public override IValue PlainValue => Bencodex.Types.Dictionary.Empty
             .Add("type_id", new Text(ActionTypeValue))
             .Add("validator", Validator.Serialize())
             .Add("amount", Amount.Serialize());
 
         /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
-        public void LoadPlainValue(IValue plainValue)
+        public override void LoadPlainValue(IValue plainValue)
         {
             var dict = (Bencodex.Types.Dictionary)plainValue;
             Validator = dict["validator"].ToPublicKey();
@@ -64,7 +64,7 @@ public void LoadPlainValue(IValue plainValue)
         }
 
         /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
-        public IWorld Execute(IActionContext context)
+        public override IWorld Execute(IActionContext context)
         {
             IActionContext ctx = context;
             if (!ctx.Signer.Equals(Validator.Address))
diff --git a/Lib9c/Action/DPoS/Sys/Redelegate.cs b/Lib9c/Action/DPoS/Sys/Redelegate.cs
index 724c355a17..b05fa65bb3 100644
--- a/Lib9c/Action/DPoS/Sys/Redelegate.cs
+++ b/Lib9c/Action/DPoS/Sys/Redelegate.cs
@@ -15,7 +15,7 @@ namespace Nekoyume.Action.DPoS.Sys
     /// of shared tokens to <see cref="DstValidator"/> from <see cref="SrcValidator"/>.
     /// </summary>
     [ActionType(ActionTypeValue)]
-    public sealed class Redelegate : IAction
+    public sealed class Redelegate : ActionBase
     {
         private const string ActionTypeValue = "redelegate";
 
@@ -55,14 +55,14 @@ internal Redelegate()
         public FungibleAssetValue ShareAmount { get; set; }
 
         /// <inheritdoc cref="IAction.PlainValue"/>
-        public IValue PlainValue => Bencodex.Types.Dictionary.Empty
+        public override IValue PlainValue => Bencodex.Types.Dictionary.Empty
             .Add("type_id", new Text(ActionTypeValue))
             .Add("src", SrcValidator.Serialize())
             .Add("dst", DstValidator.Serialize())
             .Add("amount", ShareAmount.Serialize());
 
         /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
-        public void LoadPlainValue(IValue plainValue)
+        public override void LoadPlainValue(IValue plainValue)
         {
             var dict = (Bencodex.Types.Dictionary)plainValue;
             SrcValidator = dict["src"].ToAddress();
@@ -71,7 +71,7 @@ public void LoadPlainValue(IValue plainValue)
         }
 
         /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
-        public IWorld Execute(IActionContext context)
+        public override IWorld Execute(IActionContext context)
         {
             IActionContext ctx = context;
             var states = ctx.PreviousState;
diff --git a/Lib9c/Action/DPoS/Sys/Undelegate.cs b/Lib9c/Action/DPoS/Sys/Undelegate.cs
index 822043af10..1fca561795 100644
--- a/Lib9c/Action/DPoS/Sys/Undelegate.cs
+++ b/Lib9c/Action/DPoS/Sys/Undelegate.cs
@@ -15,7 +15,7 @@ namespace Nekoyume.Action.DPoS.Sys
     /// <see cref="ShareAmount"/> of shared tokens to a given <see cref="Validator"/>.
     /// </summary>
     [ActionType(ActionTypeValue)]
-    public sealed class Undelegate : IAction
+    public sealed class Undelegate : ActionBase
     {
         private const string ActionTypeValue = "undelegate";
 
@@ -47,13 +47,13 @@ internal Undelegate()
         public FungibleAssetValue ShareAmount { get; set; }
 
         /// <inheritdoc cref="IAction.PlainValue"/>
-        public IValue PlainValue => Bencodex.Types.Dictionary.Empty
+        public override IValue PlainValue => Bencodex.Types.Dictionary.Empty
             .Add("type_id", new Text(ActionTypeValue))
             .Add("validator", Validator.Serialize())
             .Add("amount", ShareAmount.Serialize());
 
         /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
-        public void LoadPlainValue(IValue plainValue)
+        public override void LoadPlainValue(IValue plainValue)
         {
             var dict = (Bencodex.Types.Dictionary)plainValue;
             Validator = dict["validator"].ToAddress();
@@ -61,7 +61,7 @@ public void LoadPlainValue(IValue plainValue)
         }
 
         /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
-        public IWorld Execute(IActionContext context)
+        public override IWorld Execute(IActionContext context)
         {
             IActionContext ctx = context;
             var states = ctx.PreviousState;
diff --git a/Lib9c/Action/DPoS/Sys/WithdrawDelegator.cs b/Lib9c/Action/DPoS/Sys/WithdrawDelegator.cs
index bf6abcf345..e1cd9b6feb 100644
--- a/Lib9c/Action/DPoS/Sys/WithdrawDelegator.cs
+++ b/Lib9c/Action/DPoS/Sys/WithdrawDelegator.cs
@@ -16,7 +16,7 @@ namespace Nekoyume.Action.DPoS.Sys
     /// A system action for DPoS that withdraws reward tokens from given <see cref="Validator"/>.
     /// </summary>
     [ActionType(ActionTypeValue)]
-    public sealed class WithdrawDelegator : IAction
+    public sealed class WithdrawDelegator : ActionBase
     {
         private const string ActionTypeValue = "withdraw_delegator";
 
@@ -41,18 +41,18 @@ public WithdrawDelegator()
         public Address Validator { get; set; }
 
         /// <inheritdoc cref="IAction.PlainValue"/>
-        public IValue PlainValue => Bencodex.Types.Dictionary.Empty
+        public override IValue PlainValue => Bencodex.Types.Dictionary.Empty
             .Add("type_id", new Text(ActionTypeValue))
             .Add("validator", Validator.Serialize());
 
         /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
-        public void LoadPlainValue(IValue plainValue)
+        public override void LoadPlainValue(IValue plainValue)
         {
             Validator = plainValue.ToAddress();
         }
 
         /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
-        public IWorld Execute(IActionContext context)
+        public override IWorld Execute(IActionContext context)
         {
             IActionContext ctx = context;
             var states = ctx.PreviousState;
diff --git a/Lib9c/Action/DPoS/Sys/WithdrawValidator.cs b/Lib9c/Action/DPoS/Sys/WithdrawValidator.cs
index ce951a0a3e..3014dae67f 100644
--- a/Lib9c/Action/DPoS/Sys/WithdrawValidator.cs
+++ b/Lib9c/Action/DPoS/Sys/WithdrawValidator.cs
@@ -14,7 +14,7 @@ namespace Nekoyume.Action.DPoS.Sys
     /// A system action for DPoS that withdraws commission tokens from <see cref="Validator"/>.
     /// </summary>
     [ActionType(ActionTypeValue)]
-    public sealed class WithdrawValidator : IAction
+    public sealed class WithdrawValidator : ActionBase
     {
         private const string ActionTypeValue = "withdraw_validator";
 
@@ -26,17 +26,17 @@ public WithdrawValidator()
         }
 
         /// <inheritdoc cref="IAction.PlainValue"/>
-        public IValue PlainValue => Bencodex.Types.Dictionary.Empty
+        public override IValue PlainValue => Bencodex.Types.Dictionary.Empty
             .Add("type_id", new Text(ActionTypeValue));
 
         /// <inheritdoc cref="IAction.LoadPlainValue(IValue)"/>
-        public void LoadPlainValue(IValue plainValue)
+        public override void LoadPlainValue(IValue plainValue)
         {
             // Method intentionally left empty.
         }
 
         /// <inheritdoc cref="IAction.Execute(IActionContext)"/>
-        public IWorld Execute(IActionContext context)
+        public override IWorld Execute(IActionContext context)
         {
             IActionContext ctx = context;
             var states = ctx.PreviousState;