Function ProcessBlockAvailability

src/main.cpp:341–352

Check whether the last unknown block a peer advertized is not yet known. */

/** Check whether the last unknown block a peer advertized is not yet known. */
static void ProcessBlockAvailability(NodeStatePtr& state) {
    AssertLockHeld(cs_main);

    if (!state->hashLastUnknownBlock.IsNull()) {
        BlockMap::iterator itOld = mapBlockIndex.find(state->hashLastUnknownBlock);
        if (itOld != mapBlockIndex.end() && itOld->second->nChainWork > 0) {
            if (state->pindexBestKnownBlock == NULL || itOld->second->nChainWork >= state->pindexBestKnownBlock->nChainWork)
                state->pindexBestKnownBlock = itOld->second;
            state->hashLastUnknownBlock.SetNull();
        }
    }
}

/** Find the last common ancestor two blocks have.
 *  Both pa and pb must be non-NULL. */