I’m reading the Bitcoin Core LevelDB index (blocks/index) and using the BlockStatus flag to determine whether a block is valid and part of the active chain.
I’m currently using the following check:
if ((BlockStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_CHAIN)
This seems to work for most blocks, but fails for block 0, which has a BlockStatus value of 11.
As a result, the condition evaluates to false.
I assume this is because block 0 is hardcoded and possibly handled differently by Core.
So my questions are:
- Is this a reasonable proxy to infer that a block is fully verified,
based on the LevelDB metadata alone — or is this check inherently
unreliable for that purpose? - How does Bitcoin Core handle the BlockStatus of block 0
internally? - Should I skip block 0 and apply this check only to blocks with
height > 0?
