Kill the light client, CHTs and change tries. (#10080)

* Remove light client, change tries and CHTs

* Update tests

* fmt

* Restore changes_root

* Fixed benches

* Cargo fmt

* fmt

* fmt

substrate/test-utils/runtime/src/genesismap.rs

@@ -23,7 +23,6 @@ use sc_service::client::genesis;
 use sp_core::{
 	map,
 	storage::{well_known_keys, Storage},
-	ChangesTrieConfiguration,
 };
 use sp_io::hashing::{blake2_256, twox_128};
 use sp_runtime::traits::{Block as BlockT, Hash as HashT, Header as HeaderT};
@@ -31,7 +30,6 @@ use std::collections::BTreeMap;
 
 /// Configuration of a general Substrate test genesis block.
 pub struct GenesisConfig {
-	changes_trie_config: Option<ChangesTrieConfiguration>,
 	authorities: Vec<AuthorityId>,
 	balances: Vec<(AccountId, u64)>,
 	heap_pages_override: Option<u64>,
@@ -41,7 +39,6 @@ pub struct GenesisConfig {
 
 impl GenesisConfig {
 	pub fn new(
-		changes_trie_config: Option<ChangesTrieConfiguration>,
 		authorities: Vec<AuthorityId>,
 		endowed_accounts: Vec<AccountId>,
 		balance: u64,
@@ -49,7 +46,6 @@ impl GenesisConfig {
 		extra_storage: Storage,
 	) -> Self {
 		GenesisConfig {
-			changes_trie_config,
 			authorities,
 			balances: endowed_accounts.into_iter().map(|a| (a, balance)).collect(),
 			heap_pages_override,
@@ -77,9 +73,6 @@ impl GenesisConfig {
 				.into_iter(),
 			)
 			.collect();
-		if let Some(ref changes_trie_config) = self.changes_trie_config {
-			map.insert(well_known_keys::CHANGES_TRIE_CONFIG.to_vec(), changes_trie_config.encode());
-		}
 		map.insert(twox_128(&b"sys:auth"[..])[..].to_vec(), self.authorities.encode());
 		// Add the extra storage entries.
 		map.extend(self.extra_storage.top.clone().into_iter());

substrate/test-utils/runtime/src/lib.rs

@@ -28,7 +28,7 @@ use scale_info::TypeInfo;
 use sp_std::{marker::PhantomData, prelude::*};
 
 use sp_application_crypto::{ecdsa, ed25519, sr25519, RuntimeAppPublic};
-use sp_core::{offchain::KeyTypeId, ChangesTrieConfiguration, OpaqueMetadata, RuntimeDebug};
+use sp_core::{offchain::KeyTypeId, OpaqueMetadata, RuntimeDebug};
 use sp_trie::{
 	trie_types::{TrieDB, TrieDBMut},
 	PrefixedMemoryDB, StorageProof,
@@ -161,7 +161,6 @@ pub enum Extrinsic {
 	},
 	IncludeData(Vec<u8>),
 	StorageChange(Vec<u8>, Option<Vec<u8>>),
-	ChangesTrieConfigUpdate(Option<ChangesTrieConfiguration>),
 	OffchainIndexSet(Vec<u8>, Vec<u8>),
 	OffchainIndexClear(Vec<u8>),
 	Store(Vec<u8>),
@@ -197,8 +196,6 @@ impl BlindCheckable for Extrinsic {
 				},
 			Extrinsic::IncludeData(v) => Ok(Extrinsic::IncludeData(v)),
 			Extrinsic::StorageChange(key, value) => Ok(Extrinsic::StorageChange(key, value)),
-			Extrinsic::ChangesTrieConfigUpdate(new_config) =>
-				Ok(Extrinsic::ChangesTrieConfigUpdate(new_config)),
 			Extrinsic::OffchainIndexSet(key, value) => Ok(Extrinsic::OffchainIndexSet(key, value)),
 			Extrinsic::OffchainIndexClear(key) => Ok(Extrinsic::OffchainIndexClear(key)),
 			Extrinsic::Store(data) => Ok(Extrinsic::Store(data)),
@@ -265,9 +262,9 @@ pub type BlockNumber = u64;
 /// Index of a transaction.
 pub type Index = u64;
 /// The item of a block digest.
-pub type DigestItem = sp_runtime::generic::DigestItem<H256>;
+pub type DigestItem = sp_runtime::generic::DigestItem;
 /// The digest of a block.
-pub type Digest = sp_runtime::generic::Digest<H256>;
+pub type Digest = sp_runtime::generic::Digest;
 /// A test block.
 pub type Block = sp_runtime::generic::Block<Header, Extrinsic>;
 /// A test block's header.
@@ -1264,15 +1261,13 @@ fn test_witness(proof: StorageProof, root: crate::Hash) {
 	let db: sp_trie::MemoryDB<crate::Hashing> = proof.into_memory_db();
 	let backend = sp_state_machine::TrieBackend::<_, crate::Hashing>::new(db, root);
 	let mut overlay = sp_state_machine::OverlayedChanges::default();
-	let mut cache = sp_state_machine::StorageTransactionCache::<_, _, BlockNumber>::default();
+	let mut cache = sp_state_machine::StorageTransactionCache::<_, _>::default();
 	let mut ext = sp_state_machine::Ext::new(
 		&mut overlay,
 		&mut cache,
 		&backend,
 		#[cfg(feature = "std")]
 		None,
-		#[cfg(feature = "std")]
-		None,
 	);
 	assert!(ext.storage(b"value3").is_some());
 	assert!(ext.storage_root().as_slice() == &root[..]);

substrate/test-utils/runtime/src/system.rs

@@ -24,12 +24,8 @@ use crate::{
 use codec::{Decode, Encode, KeyedVec};
 use frame_support::{decl_module, decl_storage, storage};
 use frame_system::Config;
-use sp_core::{storage::well_known_keys, ChangesTrieConfiguration};
-use sp_io::{
-	hashing::blake2_256,
-	storage::{changes_root as storage_changes_root, root as storage_root},
-	trie,
-};
+use sp_core::storage::well_known_keys;
+use sp_io::{hashing::blake2_256, storage::root as storage_root, trie};
 use sp_runtime::{
 	generic,
 	traits::Header as _,
@@ -54,7 +50,6 @@ decl_storage! {
 		Number get(fn number): Option<BlockNumber>;
 		ParentHash get(fn parent_hash): Hash;
 		NewAuthorities get(fn new_authorities): Option<Vec<AuthorityId>>;
-		NewChangesTrieConfig get(fn new_changes_trie_config): Option<Option<ChangesTrieConfiguration>>;
 		StorageDigest get(fn storage_digest): Option<Digest>;
 		Authorities get(fn authorities) config(): Vec<AuthorityId>;
 	}
@@ -207,30 +202,17 @@ pub fn finalize_block() -> Header {
 	let mut digest = <StorageDigest>::take().expect("StorageDigest is set by `initialize_block`");
 
 	let o_new_authorities = <NewAuthorities>::take();
-	let new_changes_trie_config = <NewChangesTrieConfig>::take();
 
 	// This MUST come after all changes to storage are done. Otherwise we will fail the
 	// “Storage root does not match that calculated” assertion.
 	let storage_root =
 		Hash::decode(&mut &storage_root()[..]).expect("`storage_root` is a valid hash");
-	let storage_changes_root = storage_changes_root(&parent_hash.encode())
-		.map(|r| Hash::decode(&mut &r[..]).expect("`storage_changes_root` is a valid hash"));
-
-	if let Some(storage_changes_root) = storage_changes_root {
-		digest.push(generic::DigestItem::ChangesTrieRoot(storage_changes_root));
-	}
 
 	if let Some(new_authorities) = o_new_authorities {
 		digest.push(generic::DigestItem::Consensus(*b"aura", new_authorities.encode()));
 		digest.push(generic::DigestItem::Consensus(*b"babe", new_authorities.encode()));
 	}
 
-	if let Some(new_config) = new_changes_trie_config {
-		digest.push(generic::DigestItem::ChangesTrieSignal(
-			generic::ChangesTrieSignal::NewConfiguration(new_config),
-		));
-	}
-
 	Header { number, extrinsics_root, state_root: storage_root, parent_hash, digest }
 }
 
@@ -251,8 +233,6 @@ fn execute_transaction_backend(utx: &Extrinsic, extrinsic_index: u32) -> ApplyEx
 		Extrinsic::IncludeData(_) => Ok(Ok(())),
 		Extrinsic::StorageChange(key, value) =>
 			execute_storage_change(key, value.as_ref().map(|v| &**v)),
-		Extrinsic::ChangesTrieConfigUpdate(ref new_config) =>
-			execute_changes_trie_config_update(new_config.clone()),
 		Extrinsic::OffchainIndexSet(key, value) => {
 			sp_io::offchain_index::set(&key, &value);
 			Ok(Ok(()))
@@ -311,18 +291,6 @@ fn execute_storage_change(key: &[u8], value: Option<&[u8]>) -> ApplyExtrinsicRes
 	Ok(Ok(()))
 }
 
-fn execute_changes_trie_config_update(
-	new_config: Option<ChangesTrieConfiguration>,
-) -> ApplyExtrinsicResult {
-	match new_config.clone() {
-		Some(new_config) =>
-			storage::unhashed::put_raw(well_known_keys::CHANGES_TRIE_CONFIG, &new_config.encode()),
-		None => storage::unhashed::kill(well_known_keys::CHANGES_TRIE_CONFIG),
-	}
-	<NewChangesTrieConfig>::put(new_config);
-	Ok(Ok(()))
-}
-
 #[cfg(feature = "std")]
 fn info_expect_equal_hash(given: &Hash, expected: &Hash) {
 	use sp_core::hexdisplay::HexDisplay;