diff --git a/rpc/api.go b/rpc/api.go
index cdd95c888d..76fa9b9df6 100644
--- a/rpc/api.go
+++ b/rpc/api.go
@@ -94,7 +94,7 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 			return err
 		}
 
-		v := api.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address.Hex()).Balance()
+		v := api.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address).Balance()
 		*reply = common.ToHex(v.Bytes())
 	case "eth_getStorage", "eth_storageAt":
 		args := new(GetStorageArgs)
@@ -102,15 +102,15 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 			return err
 		}
 
-		*reply = api.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address.Hex()).Storage()
+		*reply = api.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address).Storage()
 	case "eth_getStorageAt":
 		args := new(GetStorageAtArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		state := api.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address.Hex())
-		value := state.StorageString(args.Key.Hex())
+		state := api.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address)
+		value := state.StorageString(args.Key)
 
 		*reply = common.Bytes2Hex(value.Bytes())
 	case "eth_getTransactionCount":
@@ -119,14 +119,14 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 			return err
 		}
 
-		*reply = api.xethAtStateNum(args.BlockNumber).TxCountAt(args.Address.Hex())
+		*reply = api.xethAtStateNum(args.BlockNumber).TxCountAt(args.Address)
 	case "eth_getBlockTransactionCountByHash":
 		args := new(GetBlockByHashArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		block := NewBlockRes(api.xeth().EthBlockByHash(args.BlockHash.Hex()))
+		block := NewBlockRes(api.xeth().EthBlockByHash(args.BlockHash))
 		*reply = common.ToHex(big.NewInt(int64(len(block.Transactions))).Bytes())
 	case "eth_getBlockTransactionCountByNumber":
 		args := new(GetBlockByNumberArgs)
@@ -142,7 +142,7 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 			return err
 		}
 
-		block := api.xeth().EthBlockByHash(args.BlockHash.Hex())
+		block := api.xeth().EthBlockByHash(args.BlockHash)
 		br := NewBlockRes(block)
 		*reply = common.ToHex(big.NewInt(int64(len(br.Uncles))).Bytes())
 	case "eth_getUncleCountByBlockNumber":
@@ -159,14 +159,14 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		*reply = api.xethAtStateNum(args.BlockNumber).CodeAt(args.Address.Hex())
+		*reply = api.xethAtStateNum(args.BlockNumber).CodeAt(args.Address)
 	case "eth_sendTransaction", "eth_transact":
 		args := new(NewTxArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		v, err := api.xeth().Transact(args.From.Hex(), args.To.Hex(), args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
+		v, err := api.xeth().Transact(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
 		if err != nil {
 			return err
 		}
@@ -177,7 +177,7 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 			return err
 		}
 
-		v, err := api.xethAtStateNum(args.BlockNumber).Call(args.From.Hex(), args.To.Hex(), args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
+		v, err := api.xethAtStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
 		if err != nil {
 			return err
 		}
@@ -191,7 +191,7 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 			return err
 		}
 
-		block := api.xeth().EthBlockByHash(args.BlockHash.Hex())
+		block := api.xeth().EthBlockByHash(args.BlockHash)
 		br := NewBlockRes(block)
 		br.fullTx = args.IncludeTxs
 
@@ -222,7 +222,7 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 			return err
 		}
 
-		block := api.xeth().EthBlockByHash(args.Hash.Hex())
+		block := api.xeth().EthBlockByHash(args.Hash)
 		br := NewBlockRes(block)
 		br.fullTx = true
 
@@ -250,14 +250,14 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 			return err
 		}
 
-		br := NewBlockRes(api.xeth().EthBlockByHash(args.Hash.Hex()))
+		br := NewBlockRes(api.xeth().EthBlockByHash(args.Hash))
 
 		if args.Index > int64(len(br.Uncles)) || args.Index < 0 {
 			return NewValidationError("Index", "does not exist")
 		}
 
-		uhash := br.Uncles[args.Index].Hex()
-		uncle := NewBlockRes(api.xeth().EthBlockByHash(uhash))
+		uhash := br.Uncles[args.Index]
+		uncle := NewBlockRes(api.xeth().EthBlockByHash(uhash.Hex()))
 
 		*reply = uncle
 	case "eth_getUncleByBlockNumberAndIndex":
@@ -274,8 +274,8 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 			return NewValidationError("Index", "does not exist")
 		}
 
-		uhash := v.Uncles[args.Index].Hex()
-		uncle := NewBlockRes(api.xeth().EthBlockByHash(uhash))
+		uhash := v.Uncles[args.Index]
+		uncle := NewBlockRes(api.xeth().EthBlockByHash(uhash.Hex()))
 
 		*reply = uncle
 	case "eth_getCompilers":
@@ -332,7 +332,7 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		*reply = api.xeth().RemoteMining().SubmitWork(args.Nonce, args.Digest, args.Header)
+		*reply = api.xeth().RemoteMining().SubmitWork(args.Nonce, common.HexToHash(args.Digest), common.HexToHash(args.Header))
 	case "db_putString":
 		args := new(DbArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
diff --git a/rpc/args.go b/rpc/args.go
index 19258263c5..416c672b08 100644
--- a/rpc/args.go
+++ b/rpc/args.go
@@ -121,8 +121,8 @@ func (args *GetBlockByNumberArgs) UnmarshalJSON(b []byte) (err error) {
 }
 
 type NewTxArgs struct {
-	From     common.Address
-	To       common.Address
+	From     string
+	To       string
 	Value    *big.Int
 	Gas      *big.Int
 	GasPrice *big.Int
@@ -154,8 +154,8 @@ func (args *NewTxArgs) UnmarshalJSON(b []byte) (err error) {
 		return NewValidationError("from", "is required")
 	}
 
-	args.From = common.HexToAddress(ext.From)
-	args.To = common.HexToAddress(ext.To)
+	args.From = ext.From
+	args.To = ext.To
 	args.Value = common.String2Big(ext.Value)
 	args.Gas = common.String2Big(ext.Gas)
 	args.GasPrice = common.String2Big(ext.GasPrice)
@@ -172,7 +172,7 @@ func (args *NewTxArgs) UnmarshalJSON(b []byte) (err error) {
 }
 
 type GetStorageArgs struct {
-	Address     common.Address
+	Address     string
 	BlockNumber int64
 }
 
@@ -190,7 +190,7 @@ func (args *GetStorageArgs) UnmarshalJSON(b []byte) (err error) {
 	if !ok {
 		return NewInvalidTypeError("address", "not a string")
 	}
-	args.Address = common.HexToAddress(addstr)
+	args.Address = addstr
 
 	if len(obj) > 1 {
 		if err := blockHeight(obj[1], &args.BlockNumber); err != nil {
@@ -202,8 +202,8 @@ func (args *GetStorageArgs) UnmarshalJSON(b []byte) (err error) {
 }
 
 type GetStorageAtArgs struct {
-	Address     common.Address
-	Key         common.Hash
+	Address     string
+	Key         string
 	BlockNumber int64
 }
 
@@ -221,13 +221,13 @@ func (args *GetStorageAtArgs) UnmarshalJSON(b []byte) (err error) {
 	if !ok {
 		return NewInvalidTypeError("address", "not a string")
 	}
-	args.Address = common.HexToAddress(addstr)
+	args.Address = addstr
 
 	keystr, ok := obj[1].(string)
 	if !ok {
 		return NewInvalidTypeError("key", "not a string")
 	}
-	args.Key = common.HexToHash(keystr)
+	args.Key = keystr
 
 	if len(obj) > 2 {
 		if err := blockHeight(obj[2], &args.BlockNumber); err != nil {
@@ -239,7 +239,7 @@ func (args *GetStorageAtArgs) UnmarshalJSON(b []byte) (err error) {
 }
 
 type GetTxCountArgs struct {
-	Address     common.Address
+	Address     string
 	BlockNumber int64
 }
 
@@ -257,7 +257,7 @@ func (args *GetTxCountArgs) UnmarshalJSON(b []byte) (err error) {
 	if !ok {
 		return NewInvalidTypeError("address", "not a string")
 	}
-	args.Address = common.HexToAddress(addstr)
+	args.Address = addstr
 
 	if len(obj) > 1 {
 		if err := blockHeight(obj[1], &args.BlockNumber); err != nil {
@@ -269,7 +269,7 @@ func (args *GetTxCountArgs) UnmarshalJSON(b []byte) (err error) {
 }
 
 type GetBalanceArgs struct {
-	Address     common.Address
+	Address     string
 	BlockNumber int64
 }
 
@@ -287,7 +287,7 @@ func (args *GetBalanceArgs) UnmarshalJSON(b []byte) (err error) {
 	if !ok {
 		return NewInvalidTypeError("address", "not a string")
 	}
-	args.Address = common.HexToAddress(addstr)
+	args.Address = addstr
 
 	if len(obj) > 1 {
 		if err := blockHeight(obj[1], &args.BlockNumber); err != nil {
@@ -299,7 +299,7 @@ func (args *GetBalanceArgs) UnmarshalJSON(b []byte) (err error) {
 }
 
 type GetDataArgs struct {
-	Address     common.Address
+	Address     string
 	BlockNumber int64
 }
 
@@ -317,7 +317,7 @@ func (args *GetDataArgs) UnmarshalJSON(b []byte) (err error) {
 	if !ok {
 		return NewInvalidTypeError("address", "not a string")
 	}
-	args.Address = common.HexToAddress(addstr)
+	args.Address = addstr
 
 	if len(obj) > 1 {
 		if err := blockHeight(obj[1], &args.BlockNumber); err != nil {
@@ -763,8 +763,8 @@ func (args *WhisperFilterArgs) UnmarshalJSON(b []byte) (err error) {
 
 type SubmitWorkArgs struct {
 	Nonce  uint64
-	Header common.Hash
-	Digest common.Hash
+	Header string
+	Digest string
 }
 
 func (args *SubmitWorkArgs) UnmarshalJSON(b []byte) (err error) {
@@ -788,13 +788,13 @@ func (args *SubmitWorkArgs) UnmarshalJSON(b []byte) (err error) {
 		return NewInvalidTypeError("header", "not a string")
 	}
 
-	args.Header = common.HexToHash(objstr)
+	args.Header = objstr
 
 	if objstr, ok = obj[2].(string); !ok {
 		return NewInvalidTypeError("digest", "not a string")
 	}
 
-	args.Digest = common.HexToHash(objstr)
+	args.Digest = objstr
 
 	return nil
 }
diff --git a/rpc/args_test.go b/rpc/args_test.go
index 71f1a7058b..c5d407c973 100644
--- a/rpc/args_test.go
+++ b/rpc/args_test.go
@@ -6,8 +6,6 @@ import (
 	"fmt"
 	"math/big"
 	"testing"
-
-	"github.com/ethereum/go-ethereum/common"
 )
 
 func ExpectValidationError(err error) string {
@@ -106,7 +104,7 @@ func TestSha3ArgsDataInvalid(t *testing.T) {
 func TestGetBalanceArgs(t *testing.T) {
 	input := `["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "0x1f"]`
 	expected := new(GetBalanceArgs)
-	expected.Address = common.HexToAddress("0x407d73d8a49eeb85d32cf465507dd71d507100c1")
+	expected.Address = "0x407d73d8a49eeb85d32cf465507dd71d507100c1"
 	expected.BlockNumber = 31
 
 	args := new(GetBalanceArgs)
@@ -126,7 +124,7 @@ func TestGetBalanceArgs(t *testing.T) {
 func TestGetBalanceArgsLatest(t *testing.T) {
 	input := `["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "latest"]`
 	expected := new(GetBalanceArgs)
-	expected.Address = common.HexToAddress("0x407d73d8a49eeb85d32cf465507dd71d507100c1")
+	expected.Address = "0x407d73d8a49eeb85d32cf465507dd71d507100c1"
 	expected.BlockNumber = -1
 
 	args := new(GetBalanceArgs)
@@ -316,8 +314,8 @@ func TestNewTxArgs(t *testing.T) {
   "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"},
   "0x10"]`
 	expected := new(NewTxArgs)
-	expected.From = common.HexToAddress("0xb60e8dd61c5d32be8058bb8eb970870f07233155")
-	expected.To = common.HexToAddress("0xd46e8dd67c5d32be8058bb8eb970870f072445675")
+	expected.From = "0xb60e8dd61c5d32be8058bb8eb970870f07233155"
+	expected.To = "0xd46e8dd67c5d32be8058bb8eb970870f072445675"
 	expected.Gas = big.NewInt(30400)
 	expected.GasPrice = big.NewInt(10000000000000)
 	expected.Value = big.NewInt(10000000000000)
@@ -361,7 +359,7 @@ func TestNewTxArgs(t *testing.T) {
 func TestNewTxArgsBlockInt(t *testing.T) {
 	input := `[{"from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155"}, 5]`
 	expected := new(NewTxArgs)
-	expected.From = common.HexToAddress("0xb60e8dd61c5d32be8058bb8eb970870f07233155")
+	expected.From = "0xb60e8dd61c5d32be8058bb8eb970870f07233155"
 	expected.BlockNumber = big.NewInt(5).Int64()
 
 	args := new(NewTxArgs)
@@ -381,7 +379,7 @@ func TestNewTxArgsBlockInt(t *testing.T) {
 func TestNewTxArgsBlockInvalid(t *testing.T) {
 	input := `[{"from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155"}, false]`
 	expected := new(NewTxArgs)
-	expected.From = common.HexToAddress("0xb60e8dd61c5d32be8058bb8eb970870f07233155")
+	expected.From = "0xb60e8dd61c5d32be8058bb8eb970870f07233155"
 	expected.BlockNumber = big.NewInt(5).Int64()
 
 	args := new(NewTxArgs)
@@ -438,7 +436,7 @@ func TestNewTxArgsFromEmpty(t *testing.T) {
 func TestGetStorageArgs(t *testing.T) {
 	input := `["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "latest"]`
 	expected := new(GetStorageArgs)
-	expected.Address = common.HexToAddress("0x407d73d8a49eeb85d32cf465507dd71d507100c1")
+	expected.Address = "0x407d73d8a49eeb85d32cf465507dd71d507100c1"
 	expected.BlockNumber = -1
 
 	args := new(GetStorageArgs)
@@ -498,8 +496,8 @@ func TestGetStorageAddressInt(t *testing.T) {
 func TestGetStorageAtArgs(t *testing.T) {
 	input := `["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "0x0", "0x2"]`
 	expected := new(GetStorageAtArgs)
-	expected.Address = common.HexToAddress("0x407d73d8a49eeb85d32cf465507dd71d507100c1")
-	expected.Key = common.HexToHash("0x0")
+	expected.Address = "0x407d73d8a49eeb85d32cf465507dd71d507100c1"
+	expected.Key = "0x0"
 	expected.BlockNumber = 2
 
 	args := new(GetStorageAtArgs)
@@ -573,7 +571,7 @@ func TestGetStorageAtArgsValueNotString(t *testing.T) {
 func TestGetTxCountArgs(t *testing.T) {
 	input := `["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "pending"]`
 	expected := new(GetTxCountArgs)
-	expected.Address = common.HexToAddress("0x407d73d8a49eeb85d32cf465507dd71d507100c1")
+	expected.Address = "0x407d73d8a49eeb85d32cf465507dd71d507100c1"
 	expected.BlockNumber = -2
 
 	args := new(GetTxCountArgs)
@@ -633,7 +631,7 @@ func TestGetTxCountBlockheightInvalid(t *testing.T) {
 func TestGetDataArgs(t *testing.T) {
 	input := `["0xd5677cf67b5aa051bb40496e68ad359eb97cfbf8", "latest"]`
 	expected := new(GetDataArgs)
-	expected.Address = common.HexToAddress("0xd5677cf67b5aa051bb40496e68ad359eb97cfbf8")
+	expected.Address = "0xd5677cf67b5aa051bb40496e68ad359eb97cfbf8"
 	expected.BlockNumber = -1
 
 	args := new(GetDataArgs)
@@ -1505,8 +1503,8 @@ func TestSubmitWorkArgs(t *testing.T) {
 	input := `["0x0000000000000001", "0x1234567890abcdef1234567890abcdef", "0xD1GE5700000000000000000000000000"]`
 	expected := new(SubmitWorkArgs)
 	expected.Nonce = 1
-	expected.Header = common.HexToHash("0x1234567890abcdef1234567890abcdef")
-	expected.Digest = common.HexToHash("0xD1GE5700000000000000000000000000")
+	expected.Header = "0x1234567890abcdef1234567890abcdef"
+	expected.Digest = "0xD1GE5700000000000000000000000000"
 
 	args := new(SubmitWorkArgs)
 	if err := json.Unmarshal([]byte(input), &args); err != nil {