7878f97bf1
Replace CommitInternal method with CustomCommit and use interfaces::Chain instead of CChainState to generate block locator. This commit does not change behavior in any way, except in the (m_best_block_index == nullptr) case, which was added recently in https://github.com/bitcoin/bitcoin/pull/24117 as part of an ongoing attempt to prevent index corruption if bitcoind is interrupted during startup. New behavior in that case should be slightly better than the old behavior (skipping the entire custom+base commit now vs only skipping the base commit previously) and this might avoid more cases of corruption.
src/node/
The src/node/ directory contains code that needs to access node state
(state in CChain, CBlockIndex, CCoinsView, CTxMemPool, and similar
classes).
Code in src/node/ is meant to be segregated from code in
src/wallet/ and src/qt/, to ensure wallet and GUI
code changes don't interfere with node operation, to allow wallet and GUI code
to run in separate processes, and to perhaps eventually allow wallet and GUI
code to be maintained in separate source repositories.
As a rule of thumb, code in one of the src/node/,
src/wallet/, or src/qt/ directories should avoid
calling code in the other directories directly, and only invoke it indirectly
through the more limited src/interfaces/ classes.
This directory is at the moment
sparsely populated. Eventually more substantial files like
src/validation.cpp and
src/txmempool.cpp might be moved there.