Allow updating configuration of changes tries (#3201)

* DigestItem::ChangesTrieSignal

* introduce changes_trie::State

* introduce config activation block

* ChangesTrieSignal::as_new_configuration

* moved well_known_cache_keys to client

* extracted DbChangesTrieStorage to separate file

* change meaning of none in blockchain cache

* changes trie config (FULL) cache draft

* eliminating const ChangesTrieConfiguration

* delay pruning

* continue elimination

* do not prune CT config from cache

* removed redundant code

* fix some TODOs

* introduce ConfigurationRange

* use Configuration range in build

* build skewed digest

* remove debug print

* extracted surface iterator

* key_changes works with skewed digests

* fix client build

* add test for NeverPrune

* fix TODO

* fixed some TODOs

* more tests

* fixing TODOs

* fixed compilation

* update runtime version

* git rid of large tuple

* too long lines

* config_activation_block -> zero

* obsolete TODO

* removed unjustified expect

* update TODOs with issue number

* new CT pruning algorithm

fixed cache + multiple blocks finalization

track CT configuraiton on light clients

support CT configuration change revert

revert CT config test

new CT pruning algorithm

fixed cache + multiple blocks finalization

track CT configuraiton on light clients

support CT configuration change revert

revert CT config test

* BlockIdOrHeader isn't really required

* removed debug leftovers + some docs

* more docs

* more post-merge fixes

* more post-merge fixes

* revertes some unnecessary changes

* reverted unnecessary changes

* fix compilation + unnecessary changes

* (restart CI)

* fix cache update when finalizing multiple blocks

* fixed tests

* collect_extrinsics -> set_collect_extrinsics

* restore lost test

* do not calculate block number twice

* Update primitives/blockchain/src/error.rs

Co-Authored-By: cheme <emericchevalier.pro@gmail.com>

* map_err -> unwrap_or

* document get_at Result

* delete abandoned file

* added weight for set_changes_trie_config

* prefer_configs -> fail_if_disabled

* Update client/api/src/backend.rs

Co-Authored-By: cheme <emericchevalier.pro@gmail.com>

* Update client/db/src/changes_tries_storage.rs

Co-Authored-By: cheme <emericchevalier.pro@gmail.com>

* CommitOperation+merge -> CommitOperations

* fixed test compilation

* merged two different CTRange structs

* lost file

* uggrade db from v0 to v1 (init CT cache + add column)

* fix after merge

Co-authored-by: cheme <emericchevalier.pro@gmail.com>
Co-authored-by: Gavin Wood <github@gavwood.com>

substrate/primitives/api/src/lib.rs

@@ -36,7 +36,7 @@ extern crate self as sp_api;
 #[doc(hidden)]
 #[cfg(feature = "std")]
 pub use sp_state_machine::{
-	OverlayedChanges, StorageProof, Backend as StateBackend, ChangesTrieStorage,
+	OverlayedChanges, StorageProof, Backend as StateBackend, ChangesTrieState,
 };
 #[doc(hidden)]
 #[cfg(feature = "std")]
@@ -325,10 +325,10 @@ pub trait ApiExt<Block: BlockT>: ApiErrorExt {
 	/// api functions.
 	///
 	/// After executing this function, all collected changes are reset.
-	fn into_storage_changes<T: ChangesTrieStorage<HasherFor<Block>, NumberFor<Block>>>(
+	fn into_storage_changes(
 		&self,
 		backend: &Self::StateBackend,
-		changes_trie_storage: Option<&T>,
+		changes_trie_state: Option<&ChangesTrieState<HasherFor<Block>, NumberFor<Block>>>,
 		parent_hash: Block::Hash,
 	) -> Result<StorageChanges<Self::StateBackend, Block>, String> where Self: Sized;
 }