Byte offset within blk?????.dat where this block's data is stored
Declared in <chain.h>
[[guarded_by(0x7ff36cbf2698), guarded_by(0x7ff379204bd8), guarded_by(0x7ff39283abb8), guarded_by(0x7ff383368ed8), guarded_by(0x7ff38bd20a38), guarded_by(0x7ff392c208f8), guarded_by(0x7ff36c161508), guarded_by(0x7ff381ccf058), guarded_by(0x7ff38d75c0a8), guarded_by(0x7ff36872cd58), guarded_by(0x7ff3743a6a98)]]
unsigned int nDataPos = {0};