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Implement change trie for child trie. (#3122)

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* Initial implementation, some redundancy is awkward and there is
some useless computation (but there is a pending pr for that).
Next are tests.

* Minimal tests and fix extend child.

* implement iterator for change child trie.

* prune child trie.

* Fix pruning test.

* bump spec version.

* Avoid empty child trie (could also be checked before)

* tabs.

* Fix child digest overriding each others.

* Restore doc deleted on merge.

* Check correct child value on extrinsics build.

* Revert runtime version update.
This commit is contained in:
cheme
2019-09-02 11:10:42 +02:00
committed by Svyatoslav Nikolsky
parent 06658e0c3c
commit e3d0c60a31
23 changed files with 670 additions and 138 deletions
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substrate/core/state-machine/src/ext.rs
+4 -4
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@@ -305,10 +305,10 @@ where
let child_delta_iter = child_storage_keys.map(|storage_key|
(storage_key.clone(), self.overlay.committed.children.get(storage_key)
.into_iter()
.flat_map(|map| map.1.iter().map(|(k, v)| (k.clone(), v.clone())))
.flat_map(|map| map.iter().map(|(k, v)| (k.clone(), v.value.clone())))
.chain(self.overlay.prospective.children.get(storage_key)
.into_iter()
.flat_map(|map| map.1.iter().map(|(k, v)| (k.clone(), v.clone()))))));
.flat_map(|map| map.iter().map(|(k, v)| (k.clone(), v.value.clone()))))));
// compute and memoize
@@ -333,10 +333,10 @@ where
let delta = self.overlay.committed.children.get(storage_key)
.into_iter()
.flat_map(|map| map.1.iter().map(|(k, v)| (k.clone(), v.clone())))
.flat_map(|map| map.iter().map(|(k, v)| (k.clone(), v.value.clone())))
.chain(self.overlay.prospective.children.get(storage_key)
.into_iter()
.flat_map(|map| map.1.clone().into_iter()));
.flat_map(|map| map.clone().into_iter().map(|(k, v)| (k.clone(), v.value.clone()))));
let root = self.backend.child_storage_root(storage_key, delta).0;