[PoC/WIP] Spec version 3 of clear_prefix and kill_storage

[lamafab]

Context: #588 (Not merging until the RFC has been finalized)

• ext_storage_clear_prefix_version_3
• ext_default_child_storage_clear_prefix_version_3
• ext_default_child_storage_kill_storage_version_4

[lamafab]

This is now implemented in the Substrate codebase.

[tomaka]

This is now implemented in the Substrate codebase.

Do you have a link to a PR? I can't find it.

If it's indeed been implemented, it arguably shouldn't have been without a RFC/discussion.

[lamafab]

So I found this: paritytech/substrate#11490 Looks like it has been there for quite some time now 🤔

[bkchr]

I also wanted to have this done as some RFC (I know that I very very slow). The current implementation isn't done in the way it was described in the issue in Substrate.

[tomaka]

So correct me if I'm wrong: this PR doesn't actually correspond to #588 (as mentioned in the OP) but corresponds to paritytech/substrate#11490, which has already been deployed ages ago?

[bkchr]

which has already been deployed ages ago

We never activated the host functions, so it was never deployed. So, we can still fix them.

[lamafab]

Reverted changes