How to transfer wrapped DOT from Astar to Polkadot using XCM

Question

How do you tranfer wrapped DOT (AssetId: 340,282,366,920,938,463,463,374,607,431,768,211,455) on Astar/Shiden to Polkadot/Kusama using XCM?

Following this guide from Astar XCM documentation, this demonstrates how to transfer DOT from Kusama to Shiden (mapped to wrapped DOT) using the XCM instruction limited_reserve_transfer_asset.

What is the equivalent XCM instruction to perform the transfer in the other direction?

I have attempted to execute the following XCM instruction using chopsticks, but failed with "Failed to transfer Asset".

let message = Xcm(vec![
  DescendOrigin,
  TransferWithdrawAsset {
    assets: (Here, amount).into(),
    dest: MultiLocation::parent(),
    xcm: Xcm(vec![
        DepositAsset {
          assets: All.into(),
          beneficiary: AccountId32 { 
              id: contract_pub_key
              network: None 
          }.into(),
        },
      ]),
  },
]);

Answer 1

To transfer DOT back to Polkadot, you can use orml-xtokens pallet in Astar: