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.
Internal c++ interfaces
The following interfaces are defined here:
-
Chain— used by wallet to access blockchain and mempool state. Added in #14437, #14711, #15288, and #10973. -
ChainClient— used by node to start & stopChainclients. Added in #14437. -
Node— used by GUI to start & stop bitcoin node. Added in #10244. -
Handler— returned byhandleEventmethods on interfaces above and used to manage lifetimes of event handlers. -
Init— used by multiprocess code to access interfaces above on startup. Added in #19160. -
Ipc— used by multiprocess code to accessInitinterface across processes. Added in #19160.
The interfaces above define boundaries between major components of bitcoin code (node, wallet, and gui), making it possible for them to run in different processes, and be tested, developed, and understood independently. These interfaces are not currently designed to be stable or to be used externally.