diff --git a/cmd/harmony/main.go b/cmd/harmony/main.go
index 729c7176f..450746cc5 100644
--- a/cmd/harmony/main.go
+++ b/cmd/harmony/main.go
@@ -416,7 +416,7 @@ func main() {
 		}
 		// TODO (leo): use a passing list of accounts here
 		devnetConfig, err := shardingconfig.NewInstance(
-			uint32(*devnetNumShards), *devnetShardSize, *devnetHarmonySize, genesis.HarmonyAccounts, genesis.FoundationalNodeAccounts)
+			uint32(*devnetNumShards), *devnetShardSize, *devnetHarmonySize, genesis.HarmonyAccounts, genesis.FoundationalNodeAccounts, nil)
 		if err != nil {
 			_, _ = fmt.Fprintf(os.Stderr, "invalid devnet sharding config: %s",
 				err)
diff --git a/internal/configs/sharding/instance.go b/internal/configs/sharding/instance.go
index dcd896d64..6fe672e4a 100644
--- a/internal/configs/sharding/instance.go
+++ b/internal/configs/sharding/instance.go
@@ -1,6 +1,8 @@
 package shardingconfig
 
 import (
+	"math/big"
+
 	"github.com/harmony-one/harmony/internal/ctxerror"
 	"github.com/harmony-one/harmony/internal/genesis"
 )
@@ -11,6 +13,7 @@ type instance struct {
 	numHarmonyOperatedNodesPerShard int
 	hmyAccounts                     []genesis.DeployAccount
 	fnAccounts                      []genesis.DeployAccount
+	reshardingEpoch                 []*big.Int
 }
 
 // NewInstance creates and validates a new sharding configuration based
@@ -19,6 +22,7 @@ func NewInstance(
 	numShards uint32, numNodesPerShard, numHarmonyOperatedNodesPerShard int,
 	hmyAccounts []genesis.DeployAccount,
 	fnAccounts []genesis.DeployAccount,
+	reshardingEpoch []*big.Int,
 ) (Instance, error) {
 	if numShards < 1 {
 		return nil, ctxerror.New("sharding config must have at least one shard",
@@ -45,6 +49,7 @@ func NewInstance(
 		numHarmonyOperatedNodesPerShard: numHarmonyOperatedNodesPerShard,
 		hmyAccounts:                     hmyAccounts,
 		fnAccounts:                      fnAccounts,
+		reshardingEpoch:                 reshardingEpoch,
 	}, nil
 }
 
@@ -55,9 +60,10 @@ func MustNewInstance(
 	numShards uint32, numNodesPerShard, numHarmonyOperatedNodesPerShard int,
 	hmyAccounts []genesis.DeployAccount,
 	fnAccounts []genesis.DeployAccount,
+	reshardingEpoch []*big.Int,
 ) Instance {
 	sc, err := NewInstance(
-		numShards, numNodesPerShard, numHarmonyOperatedNodesPerShard, hmyAccounts, fnAccounts)
+		numShards, numNodesPerShard, numHarmonyOperatedNodesPerShard, hmyAccounts, fnAccounts, reshardingEpoch)
 	if err != nil {
 		panic(err)
 	}
@@ -107,3 +113,8 @@ func (sc instance) FindAccount(blsPubKey string) (bool, *genesis.DeployAccount)
 	}
 	return false, nil
 }
+
+// ReshardingEpoch returns the list of epoch number
+func (sc instance) ReshardingEpoch() []*big.Int {
+	return sc.reshardingEpoch
+}
diff --git a/internal/configs/sharding/localnet.go b/internal/configs/sharding/localnet.go
index 4bb0304df..ae97a5a8a 100644
--- a/internal/configs/sharding/localnet.go
+++ b/internal/configs/sharding/localnet.go
@@ -23,6 +23,8 @@ func (localnetSchedule) InstanceForEpoch(epoch *big.Int) Instance {
 	}
 }
 
-var localnetV0 = MustNewInstance(2, 7, 5, genesis.LocalHarmonyAccounts, genesis.LocalFnAccounts)
-var localnetV1 = MustNewInstance(2, 7, 5, genesis.LocalHarmonyAccountsV1, genesis.LocalFnAccountsV1)
-var localnetV2 = MustNewInstance(2, 7, 4, genesis.LocalHarmonyAccountsV2, genesis.LocalFnAccountsV2)
+var reshardingEpoch = []*big.Int{big.NewInt(10), big.NewInt(20)}
+
+var localnetV0 = MustNewInstance(2, 7, 5, genesis.LocalHarmonyAccounts, genesis.LocalFnAccounts, reshardingEpoch)
+var localnetV1 = MustNewInstance(2, 7, 5, genesis.LocalHarmonyAccountsV1, genesis.LocalFnAccountsV1, reshardingEpoch)
+var localnetV2 = MustNewInstance(2, 7, 4, genesis.LocalHarmonyAccountsV2, genesis.LocalFnAccountsV2, reshardingEpoch)
diff --git a/internal/configs/sharding/mainnet.go b/internal/configs/sharding/mainnet.go
index 6c3247b4f..bf3fac2f1 100644
--- a/internal/configs/sharding/mainnet.go
+++ b/internal/configs/sharding/mainnet.go
@@ -22,7 +22,7 @@ func (mainnetSchedule) InstanceForEpoch(epoch *big.Int) Instance {
 	}
 }
 
-var mainnetV0 = MustNewInstance(4, 150, 112, genesis.HarmonyAccounts, genesis.FoundationalNodeAccounts)
+var mainnetV0 = MustNewInstance(4, 150, 112, genesis.HarmonyAccounts, genesis.FoundationalNodeAccounts, nil)
 
 //var mainnetV2 = MustNewInstance(8, 200, 100)
 //var mainnet6400 = MustNewInstance(16, 400, 50)
diff --git a/internal/configs/sharding/testnet.go b/internal/configs/sharding/testnet.go
index 2210a7017..532fea229 100644
--- a/internal/configs/sharding/testnet.go
+++ b/internal/configs/sharding/testnet.go
@@ -19,4 +19,4 @@ func (testnetSchedule) InstanceForEpoch(epoch *big.Int) Instance {
 	}
 }
 
-var testnetV0 = MustNewInstance(2, 150, 150, genesis.TNHarmonyAccounts, genesis.FoundationalNodeAccounts)
+var testnetV0 = MustNewInstance(2, 150, 150, genesis.TNHarmonyAccounts, genesis.FoundationalNodeAccounts, nil)