Following the instructions in this post: How to open HRMP channels between parachains? It lloks like the following instructions are required to open an HRMP channel:

  • WithdrawAsset
  • BuyExecution
  • RefundSurplus
  • DepositAsset
  • Transact (to hold the encoded call for the request to open a channel)

But there's also the HrmpNewChannelOpenRequest instruction available to select. What's the use case for that instruction?

1 Answer 1


HrmpNewChannelOpenRequest instruction is not implemented yet in xcm-executor, https://github.com/paritytech/polkadot/blob/release-v0.9.31/xcm/xcm-executor/src/lib.rs#L507

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