Which # file this block is stored in (blk?????.dat)
Declared in <chain.h>
[[guarded_by(0x7f2e18da6500), guarded_by(0x7f2e18c0a660), guarded_by(0x7f2e3219cac0), guarded_by(0x7f2e34800ef0), guarded_by(0x7f2e331bb350), guarded_by(0x7f2e32e732b0), guarded_by(0x7f2e42eecc00), guarded_by(0x7f2e2ad45570), guarded_by(0x7f2e318b7df0), guarded_by(0x7f2e283edd50), guarded_by(0x7f2e29d40160)]]
int nFile = {0};