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2.1.2 Block Format

The first 20 bytes of the block header format is the same for all types of blocks.

0 blk:id
The ID of this block.
4 blk:top-id
The ID of the root block of this tree.
8 blk:nxt-id
The ID of the next block in the chain (at same level as this one).
12 blk:time
The 32-bit time/date when this block was last modified.
16 blk:end
Two-byte length of data in block, including header.
18 blk:level
Block level; 0 is leaf.
19 blk:typ
Block type, one of:
Start of data for SEQ-TYP blocks. Data spans to blk:end.
20 leaf-split-key
Start of data for other block types. Data spans to blk:end.