Byte offset within rev?????.dat where this block's undo data is stored
Declared in <chain.h>
[[guarded_by(0x7ff36cbf2758), guarded_by(0x7ff379204c98), guarded_by(0x7ff39283ac78), guarded_by(0x7ff383368f98), guarded_by(0x7ff38bd20af8), guarded_by(0x7ff392c209b8), guarded_by(0x7ff36c1615c8), guarded_by(0x7ff381ccf118), guarded_by(0x7ff38d75c168), guarded_by(0x7ff36872ce18), guarded_by(0x7ff3743a6b58)]]
unsigned int nUndoPos = {0};