reading transaction by transaction

ioOps.go

buf := make([]byte, 4)
if _, err := file.ReadAt(buf, offset); err != nil {
	if err == io.EOF {
		break
	}
	return nil, err
}
itemSize := binary.LittleEndian.Uint32(buf)
offset += 4

// reading the actual encoded item
item := make([]byte, itemSize)
if _, err := file.ReadAt(item, offset); err != nil {
	if err == io.EOF {
		break
	}
	return nil, err
}

content = append(content, item)
offset += int64(itemSize)