This proposal aims to complete the first of many steps required to open a bi-directional HRMP channel between Pendulum and Astar. Initially, its primary function is to enable PEN token on ArthSwap, the leading EVM DEX on Astar network.

Schedule a majority-carries referendum to be tabled next once it is legal to schedule
an external referendum.

The dispatch of this call must be `ExternalMajorityOrigin`.

- `proposal_hash`: The preimage hash of the proposal.

Unlike `external_propose`, blacklisting has no effect on this and it may replace a
pre-scheduled `external_propose` call.

Weight: `O(1)`

- **Problem Statement:** Establishing a bi-directional HRMP channel between Pendulum and Astar to enable PEN token on ArthSwap.
- **Significance:** Enhancing accessibility and functionality by integrating PEN token on ArthSwap, a prominent EVM DEX on Astar network.
- **Proposed Solution:** Completing the initial step to open the HRMP channel for PEN token integration on ArthSwap.
- **Expected Outcomes:** Improved liquidity and trading opportunities for PEN token holders on the Astar network.

#26 Open HRMP channel request with Astar