diff --git a/common/bytes.go b/common/bytes.go
index 634041804d..7827bb572e 100644
--- a/common/bytes.go
+++ b/common/bytes.go
@@ -17,28 +17,9 @@
 // Package common contains various helper functions.
 package common
 
-import "encoding/hex"
-
-// ToHex returns the hex representation of b, prefixed with '0x'.
-// For empty slices, the return value is "0x0".
-//
-// Deprecated: use hexutil.Encode instead.
-func ToHex(b []byte) string {
-	hex := Bytes2Hex(b)
-	if len(hex) == 0 {
-		hex = "0"
-	}
-	return "0x" + hex
-}
-
-// ToHexArray creates a array of hex-string based on []byte
-func ToHexArray(b [][]byte) []string {
-	r := make([]string, len(b))
-	for i := range b {
-		r[i] = ToHex(b[i])
-	}
-	return r
-}
+import (
+	"encoding/hex"
+)
 
 // FromHex returns the bytes represented by the hexadecimal string s.
 // s may be prefixed with "0x".
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index c7d1e0020f..0d6ace9b5b 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -599,7 +599,7 @@ func (s *PublicBlockChainAPI) GetProof(ctx context.Context, address common.Addre
 			if storageError != nil {
 				return nil, storageError
 			}
-			storageProof[i] = StorageResult{key, (*hexutil.Big)(state.GetState(address, common.HexToHash(key)).Big()), common.ToHexArray(proof)}
+			storageProof[i] = StorageResult{key, (*hexutil.Big)(state.GetState(address, common.HexToHash(key)).Big()), toHexSlice(proof)}
 		} else {
 			storageProof[i] = StorageResult{key, &hexutil.Big{}, []string{}}
 		}
@@ -613,7 +613,7 @@ func (s *PublicBlockChainAPI) GetProof(ctx context.Context, address common.Addre
 
 	return &AccountResult{
 		Address:      address,
-		AccountProof: common.ToHexArray(accountProof),
+		AccountProof: toHexSlice(accountProof),
 		Balance:      (*hexutil.Big)(state.GetBalance(address)),
 		CodeHash:     codeHash,
 		Nonce:        hexutil.Uint64(state.GetNonce(address)),
@@ -1943,3 +1943,12 @@ func checkTxFee(gasPrice *big.Int, gas uint64, cap float64) error {
 	}
 	return nil
 }
+
+// toHexSlice creates a slice of hex-strings based on []byte.
+func toHexSlice(b [][]byte) []string {
+	r := make([]string, len(b))
+	for i := range b {
+		r[i] = hexutil.Encode(b[i])
+	}
+	return r
+}