Merge pull request #10 from 18aaddy/fix/implement-common-utils-#3

Implement common utils #3

common/utils.go

@@ -1,19 +1,49 @@
 package common
 
+import (
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/ethereum/go-ethereum/common"
+)
+
 // if we need to export the functions , just make their first letter capitalised
-func hex_str_to_bytes() {
+func Hex_str_to_bytes(s string) ([]byte, error) {
+	s = strings.TrimPrefix(s, "0x")
+
+	bytesArray, err := hex.DecodeString(s)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return bytesArray, nil
 }
 
-func address_to_hex_string() {
+func Address_to_hex_string(addr common.Address) string {
+	bytesArray := addr.Bytes()
+	return fmt.Sprintf("0x%x", hex.EncodeToString(bytesArray))
 }
 
-func u64_to_hex_string() {
+func U64_to_hex_string(val uint64) string {
+	return fmt.Sprintf("0x%x", val)
 }
 
-func bytes_deserialize() {
+func Bytes_deserialize(data []byte) ([]byte, error) {
+	var hexString string
+	if err := json.Unmarshal(data, &hexString); err != nil {
+		return nil, err
+	}
 
+	return Hex_str_to_bytes(hexString)
 }
 
-func bytes_serialize() {
-
+func Bytes_serialize(bytes []byte) ([]byte, error) {
+	if bytes == nil {
+		return json.Marshal(nil)
+	}
+	hexString := hex.EncodeToString(bytes)
+	return json.Marshal(hexString)
 }