DbStoreUpdater._areEntriesValid method

db.ts

  _areEntriesValid(entries: (IEntry|null)[], entryBlockList: IEntryBlockList) {
    // check_strictly_increasing(IEntry.clock, IEntry.clock)
    if (!entries.reduce((p, c) => !p || !c ? null : p.clock < c.clock ? c : null)) {
      console.log('[Db] WARNING: Update containing non-increasing clocks was ignored (address = ' + this._address + ')');
      return false;
    }

    // check_max(IEntryBlockList.clock, IEntry.clock)
    const lastEntry = entries.slice(-1)[0];
    if (lastEntry && lastEntry.clock != entryBlockList.clock) {
      console.log('[Db] WARNING: Update containing incorrect clock was ignored (address = ' + this._address + ')');
      return false;
    }

    // success!
    return true;
  }