# Bitcoin block files
0	lelong		0xD9B4BEF9	Bitcoin
>(4.l+40)	lelong	0xD9B4BEF9	reverse block
>>4	lelong		x		\b, size %u
# normal block below
>0	default		x		block
>>4	lelong		x		\b, size %u
>>8	lelong&0xE0000000	0x20000000
>>>8	lelong		x		\b, BIP9 0x%x
>>8	lelong&0xE0000000	!0x20000000
>>>8	lelong		x		\b, version 0x%x
>>76	ledate	x	\b, %s UTC
# VarInt counter
>>88	ubyte	<0xfd	\b, txcount %u
>>88	ubyte	0xfd
>>>89	leshort	x	\b, txcount %u
>>88	ubyte	0xfe
>>>89	lelong	x	\b, txcount %u
>>88	ubyte	0xff
>>>89	lequad	x	\b, txcount %llu
!:ext	dat
# option to find more blocks in the file
#>>(4.l+8)	indirect	x	; 

# LevelDB
-8	lequad	0xdb4775248b80fb57	LevelDB table data