DbStoreUpdater._isEntryBlockValid method

db.ts

  _isEntryBlockValid(entryBlock: IEntryBlock|null, entryBlockList: IEntryBlockList, isLast: boolean) {
    // check_entry_block_exists(IEntryBlock)
    if (!entryBlock) {
      console.log('[Db] WARNING: Update referencing missing block was ignored (address = ' + this._address + ')');
      return false;
    }

    // check_entry_block_syntax(IEntryBlock)
    if (!validateEntryBlock(entryBlock)) {
      console.log('[Db] WARNING: Update containing invalid block was ignore (address = ' + this._address + ')');
      return false;
    }

    // check_num_entries(IEntryBlock.entries)
    if (!isLast && entryBlock.entries.length != this._options.entryBlockSize ||
      isLast && entryBlock.entries.length == 0) {
      console.log('[Db] WARNING: Update containing block with invalid size was ignored (address = ' + this._address + ')');
      return false;
    }

    // success!
    return true;
  }