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Safe and sane multi-item storage removal (#11490)

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* Fix overlay prefix removal result

* Second part of the overlay prefix removal fix.

* Report only items deleted from storage in clear_prefix

* Fix kill_prefix

* Formatting

* Remove unused code

* Fixes

* Fixes

* Introduce clear_prefix host function v3

* Formatting

* Use v2 for now

* Fixes

* Formatting

* Docs

* Child prefix removal should also hide v3 for now

* Fixes

* Fixes

* Formatting

* Fixes

* apply_to_keys_whle takes start_at

* apply_to_keys_whle takes start_at

* apply_to_keys_whle takes start_at

* Cursor API; force limits

* Use unsafe deprecated functions

* Formatting

* Fixes

* Grumbles

* Fixes

* Docs

* Some nitpicks 🙈

* Update primitives/externalities/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Formatting

* Fixes

* cargo fmt

* Fixes

* Update primitives/io/src/lib.rs

Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>

* Formatting

* Fixes

Co-authored-by: Bastian Köcher <info@kchr.de>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
This commit is contained in:
Gavin Wood
2022-05-29 12:56:26 +01:00
committed by GitHub
parent 189a310e4c
commit ecbd65fb95
45 changed files with 968 additions and 206 deletions
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substrate/frame/support/src/lib.rs
+6 -2
View File
@@ -1097,8 +1097,12 @@ pub mod tests {
DoubleMap::insert(&(key1 + 1), &key2, &4u64);
DoubleMap::insert(&(key1 + 1), &(key2 + 1), &4u64);
assert!(matches!(
DoubleMap::remove_prefix(&key1, None),
sp_io::KillStorageResult::AllRemoved(0), // all in overlay
DoubleMap::clear_prefix(&key1, u32::max_value(), None),
// Note this is the incorrect answer (for now), since we are using v2 of
// `clear_prefix`.
// When we switch to v3, then this will become:
// sp_io::MultiRemovalResults::NoneLeft { db: 0, total: 2 },
sp_io::MultiRemovalResults { maybe_cursor: None, backend: 0, unique: 0, loops: 0 },
));
assert_eq!(DoubleMap::get(&key1, &key2), 0u64);
assert_eq!(DoubleMap::get(&key1, &(key2 + 1)), 0u64);