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 <>

cumulus/polkadot-parachains/shell/src/lib.rs

@@ -57,7 +57,7 @@ pub use sp_runtime::{Perbill, Permill};
 use xcm::latest::prelude::*;
 use xcm_builder::{
 	AllowUnpaidExecutionFrom, FixedWeightBounds, LocationInverter, ParentAsSuperuser,
-	ParentIsDefault, SovereignSignedViaLocation,
+	ParentIsPreset, SovereignSignedViaLocation,
 };
 use xcm_executor::{Config, XcmExecutor};
 
@@ -186,7 +186,7 @@ pub type XcmOriginToTransactDispatchOrigin = (
 	// Sovereign account converter; this attempts to derive an `AccountId` from the origin location
 	// using `LocationToAccountId` and then turn that into the usual `Signed` origin. Useful for
 	// foreign chains who want to have a local sovereign account on this chain which they control.
-	SovereignSignedViaLocation<ParentIsDefault<AccountId>, Origin>,
+	SovereignSignedViaLocation<ParentIsPreset<AccountId>, Origin>,
 	// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a
 	// transaction from the Root origin.
 	ParentAsSuperuser<Origin>,