
**Summary**

This proposal from Pendulum aims to open an HRMP channel between Amplitude and Statemine and accept the request from Amplitude. 

**Details**

As is usual for opening HRMP channels, the extrinsic consists of a batch of two calls:

A 11 KSM force transfer from Kusama treasury (`F3opxRbN5ZbjJNU511Kj2TLuzFcDq9BGduA9TgiECafpg29`) to Statemine (`F7fq1jSNVTPfJmaHaXCMtatT1EZefCUsa7rRiQVNR5efcah`) to pay for fees and for the deposit. Send XCM message to Statemine to execute a transaction with superuser (root) permission.

**Relaychain preimage Data:** `0x1802080402006d6f646c70792f747273727900000000000000000000000000000000000000000070617261e80300000000000000000000000000000000000000000000000000000b00b01723010a630001000100a10f0204060203009435779d011f000101000214000400000000070010a5d4e81300000000070010a5d4e800060003009435775c1802083c004c080000e8030000009001003c014c080000140d010004000101006d6f646c70792f74727372790000000000000000000000000000000000000000`

**Relaychain preimage Hash:** `0x8114270f0af5398f3c4c62311c6cbeea6d2361f7c1e454dd9c2db50e0bab2695`

**Relaychain preimage url:** [polkadot.js view](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fkusama-rpc.polkadot.io#/extrinsics/decode/0x1802080402006d6f646c70792f747273727900000000000000000000000000000000000000000070617261e80300000000000000000000000000000000000000000000000000000b00b01723010a630001000100a10f0204060203009435779d011f000101000214000400000000070010a5d4e81300000000070010a5d4e800060003009435775c1802083c002c080000e8030000009001003c012c080000140d010004000101006d6f646c70792f74727372790000000000000000000000000000000000000000)

The call above will execute the following on Statemine: 
**Statemine xcm call Data:** `0x1f000101000214000400000000070010a5d4e81300000000070010a5d4e800060003009435775c1802083c004c080000e8030000009001003c014c080000140d010004000101006d6f646c70792f74727372790000000000000000000000000000000000000000`

**Statemine xcm call Hash:** `0x1802083c004c080000e8030000009001003c014c080000`

**Statemine xcm call url:** [polkadot.js view](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fpublic-rpc.pinknode.io%2Fstatemine#/extrinsics/decode/0x1f000101000214000400000000070010a5d4e81300000000070010a5d4e800060003009435775c1802083c004c080000e8030000009001003c014c080000140d010004000101006d6f646c70792f74727372790000000000000000000000000000000000000000)

Based on the past discussion - [Polkassembly discussion link](https://kusama.polkassembly.io/post/2040)

Send a batch of dispatch calls and atomically execute them.
The whole transaction will rollback and fail if any of the calls failed.

May be called from any origin except `None`.

- `calls`: The calls to be dispatched from the same origin. The number of call must not
  exceed the constant: `batched_calls_limit` (available in constant metadata).

If origin is root then the calls are dispatched without checking origin filter. (This
includes bypassing `frame_system::Config::BaseCallFilter`).

# <weight>
- Complexity: O(C) where C is the number of calls to be batched.
# </weight>

- Pendulum wants to open a channel between Amplitude and Statemine.
- They need to transfer 11 KSM from Kusama treasury to Statemine to pay for fees and deposit.
- They will send a message to Statemine to execute a transaction with superuser permission.
- There are some codes and links for more information.
- This is based on a discussion on Polkassembly.

#260 Open and Accept HRMP channel between Amplitude and Statemine