Added better data parser

ethutil/bytes.go

@@ -131,6 +131,26 @@ func FormatData(data string) []byte {
 	return BigToBytes(d, 256)
 }
 
+func ParseData(data ...interface{}) (ret []byte) {
+	for _, item := range data {
+		switch t := item.(type) {
+		case string:
+			var str []byte
+			if IsHex(t) {
+				str = Hex2Bytes(t[2:])
+			} else {
+				str = []byte(t)
+			}
+
+			ret = append(ret, RightPadBytes(str, 32)...)
+		case []byte:
+			ret = append(ret, LeftPadBytes(t, 32)...)
+		}
+	}
+
+	return
+}
+
 func RightPadBytes(slice []byte, l int) []byte {
 	if l < len(slice) {
 		return slice

ethutil/bytes_test.go

@@ -0,0 +1,14 @@
+package ethutil
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestParseData(t *testing.T) {
+	data := ParseData("hello", "world", "0x0106")
+	exp := "68656c6c6f000000000000000000000000000000000000000000000000000000776f726c640000000000000000000000000000000000000000000000000000000106000000000000000000000000000000000000000000000000000000000000"
+	if bytes.Compare(data, Hex2Bytes(exp)) != 0 {
+		t.Error("Error parsing data")
+	}
+}