24: 16-bit node ids and node timers (never released as stable)
25: Improved node timer format
26: Never written; read the same as 25
+ 27: Added light spreading flags to blocks
*/
// This represents an uninitialized or invalid format
#define SER_FMT_VER_INVALID 255
// Highest supported serialization version
-#define SER_FMT_VER_HIGHEST_READ 26
+#define SER_FMT_VER_HIGHEST_READ 27
// Saved on disk version
-#define SER_FMT_VER_HIGHEST_WRITE 25
+#define SER_FMT_VER_HIGHEST_WRITE 27
// Lowest supported serialization version
#define SER_FMT_VER_LOWEST_READ 0
// Lowest serialization version for writing