Companion for paritytech/polkadot#4712 (#901)

* Rename ParentIsDefault to ParentIsAllZeroes

* Fixes

* Create ParentAccounts for respective networks

* Fixes

* Use b"Parent" as the basis for generating parent AccountId

* Fixes

* Use preset parent account ID

* update lockfile for {"polkadot"}

Co-authored-by: parity-processbot <>

polkadot-parachains/rococo-parachain/src/lib.rs

@@ -73,7 +73,7 @@ use xcm::latest::prelude::*;
 use xcm_builder::{
 	AccountId32Aliases, AllowTopLevelPaidExecutionFrom, AllowUnpaidExecutionFrom, CurrencyAdapter,
 	EnsureXcmOrigin, FixedWeightBounds, IsConcrete, LocationInverter, NativeAsset,
-	ParentAsSuperuser, ParentIsDefault, RelayChainAsNative, SiblingParachainAsNative,
+	ParentAsSuperuser, ParentIsPreset, RelayChainAsNative, SiblingParachainAsNative,
 	SiblingParachainConvertsVia, SignedAccountId32AsNative, SignedToAccountId32,
 	SovereignSignedViaLocation, TakeWeightCredit, UsingComponents,
 };
@@ -283,8 +283,8 @@ parameter_types! {
 /// when determining ownership of accounts for asset transacting and when attempting to use XCM
 /// `Transact` in order to determine the dispatch Origin.
 pub type LocationToAccountId = (
-	// The parent (Relay-chain) origin converts to the default `AccountId`.
-	ParentIsDefault<AccountId>,
+	// The parent (Relay-chain) origin converts to the parent `AccountId`.
+	ParentIsPreset<AccountId>,
 	// Sibling parachain origins convert to AccountId via the `ParaId::into`.
 	SiblingParachainConvertsVia<Sibling, AccountId>,
 	// Straight up local `AccountId32` origins just alias directly to `AccountId`.