9047337d36
Make LoadChainstate return an explicit error when snapshot validation succeeds, but there is an error trying to replace the background chainstate with the snapshot chainstate. Previously in this case LoadChainstate would trigger a shutdown and return INTERRUPTED, now it will return an actual error code. There's no real change to behavior other than error message being formatted a little differently. Motivation for this change is to replace error handling via callbacks with error handling via return value ahead of https://github.com/bitcoin/bitcoin/pull/27861
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.