Companion for Substrate#10655 (#4765)

* Companion for Substrate#10655

https://github.com/paritytech/substrate/pull/10655

This removes the last usages of `Default` in conjunction with `AccountId`

* More fixes

* More of them!

* FMT

* Update Substrate

polkadot/bridges/modules/dispatch/src/lib.rs

@@ -64,8 +64,7 @@ pub mod pallet {
 			+ MaybeSerializeDeserialize
 			+ Debug
 			+ MaybeDisplay
-			+ Ord
-			+ Default;
+			+ Ord;
 		/// Type of account public key on target chain.
 		type TargetChainAccountPublic: Parameter + IdentifyAccount<AccountId = Self::AccountId>;
 		/// Type of signature that may prove that the message has been signed by

polkadot/bridges/primitives/polkadot-core/src/lib.rs

@@ -409,11 +409,13 @@ pub fn account_info_storage_key(id: &AccountId) -> Vec<u8> {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use sp_runtime::codec::Encode;
+	use parity_scale_codec::Decode;
+	use sp_runtime::{codec::Encode, traits::TrailingZeroInput};
 
 	#[test]
 	fn maximal_encoded_account_id_size_is_correct() {
-		let actual_size = AccountId::default().encode().len();
+		let actual_size =
+			AccountId::decode(&mut TrailingZeroInput::new(&[])).unwrap().encode().len();
 		assert!(
 			actual_size <= MAXIMAL_ENCODED_ACCOUNT_ID_SIZE as usize,
 			"Actual size of encoded account id for Polkadot-like chains ({}) is larger than expected {}",

polkadot/bridges/primitives/runtime/src/chain.rs

@@ -82,13 +82,8 @@ pub trait Chain: Send + Sync + 'static {
 		+ MaybeSerializeDeserialize;
 
 	/// The user account identifier type for the runtime.
-	type AccountId: Parameter
-		+ Member
-		+ MaybeSerializeDeserialize
-		+ Debug
-		+ MaybeDisplay
-		+ Ord
-		+ Default;
+	type AccountId: Parameter + Member + MaybeSerializeDeserialize + Debug + MaybeDisplay + Ord;
+
 	/// Balance of an account in native tokens.
 	///
 	/// The chain may support multiple tokens, but this particular type is for token that is used