Add a comment to describe the writing 0 scenario

[mohanson]

No description provided.

[xxuejie]

Personally, I prefer that no shortcuts are added here.

The discussed shortcut should be a syscall-level thing, but ckb-std is just one library that works on top of the syscall. By putting shortcuts here, I fear that it might become a hidden syscall knowledge that every other library out there needs to mimic. When we are designing a new set of syscalls, we should definitely avoid things like this.

[mohanson]

Personally, I prefer that no shortcuts are added here.

The discussed shortcut should be a syscall-level thing, but ckb-std is just one library that works on top of the syscall. By putting shortcuts here, I fear that it might become a hidden syscall knowledge that every other library out there needs to mimic. When we are designing a new set of syscalls, we should definitely avoid things like this.

I submitted a commit to roll back the changes, and added a comment to additionally describe the writing 0 scenario.