Find the candidate block index entry with the most work.
Declared in <validation.h>
[[requires_capability(0x7fbc8fb67468), requires_capability(0x7fbc96bffad8), requires_capability(0x7fbcaf5d6ee8), requires_capability(0x7fbc9e0dd6b8)]]
CBlockIndex*
FindMostWorkChain();
The most-work candidate block index entry, or nullptr if none qualifies.