common: fix hex utils to handle 1 byte address conversions

common/bytes.go

@@ -35,13 +35,12 @@ func FromHex(s string) []byte {
 		if s[0:2] == "0x" || s[0:2] == "0X" {
 			s = s[2:]
 		}
+	}
 	if len(s)%2 == 1 {
 		s = "0" + s
 	}
 	return Hex2Bytes(s)
 }
-	return nil
-}
 
 // Copy bytes
 //

common/bytes_test.go

@@ -86,3 +86,12 @@ func TestFromHexOddLength(t *testing.T) {
 		t.Errorf("Expected %x got %x", expected, result)
 	}
 }
+
+func TestNoPrefixShortHexOddLength(t *testing.T) {
+	input := "1"
+	expected := []byte{1}
+	result := FromHex(input)
+	if !bytes.Equal(expected, result) {
+		t.Errorf("Expected %x got %x", expected, result)
+	}
+}