## TL:DR

This proposal is to Accept an HRMP channel from Statemint to Moonbeam

## Summary

We propose to open a bi-directional channel between Moonbeam and Statemint. This will allow Statemint Assets to be moved to Moonbeam (and back). This is a follow up to Proposal #39.

## Proposal

Referendum #45 with the following hash: *0x99320f0c4fbc2a35e55d96d775dfb3104518b5369008d0c037675db9b65d8731*

## Technical details:

The procedure for opening the channels is as follows:

 - Moonbeam: proposal to open an HRMP channel to Statemint (previous proposal)
 - Statemint: democracy batched proposal (done)
     - Open Statemint to Moonbeam HRMP channel
     - Accept Moonbeam to Statemint HRMP channel
 - Moonbeam: democracy proposal to accept Statemint to Moonbeam HRMP channel (this proposaL)

Once the HRMP channels are ready, XCM based cross-chain transfer will be possible. The extrinsic that need to be executed on the relay chain, is:

 - Open the HRMP channel from Moonbeam: hrmp.hrmpAcceptOpenChannel(sender: *1000*), which its hex-encoded call data is *0x3c01e8030000*

These extrinsics need to be called from the parachain’s sovereign account as origin, via a democracy proposal. The proposal will use *polkadotXcm* pallet to send XCM message to the Relay Chain with the following items:

 - Withdraw asset: take funds out of the Sovereign Account of the origin parachain (in the relay chain) to a holding state
 - Buy execution: buys execution time from the relay chain, to execute the XCM message
 - Transact: provides the call data to be executed
 - Deposit asset (optional): refunds the leftover funds after the execution. If this is not provided, no refunds will be carried out

If you are interested, the hex-encoded call data for this proposal in [Moonbeam](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fwss.api.moonbeam.network#/extrinsics/decode) is:

0x670001010002100004000000000700e40b540213000000000700e40b5402010700f2052a01060002286bee183c01e80300000d0100040001010070617261d4070000000000000000000000000000000000000000000000000000

As a prerequisite, the parachain’s sovereign account must contain at least 20 DOT to be locked as collateral (10 for each channel direction), plus some DOT to pay for XCM execution fees.

: 

This proposal is to open a bi-directional channel between Moonbeam and Statemint. A democracy proposal with the hash 0x99320f0c4fbc2a35e55d96d775dfb3104518b5369008d0c037675db9b65d8731 is proposed in order to accept the Statemint to Moonbeam HRMP channel. The hex-encoded call data is 0x670001010002100004000000000700e40b540213000000000700e40b5402010700f2052a01060002286bee183c01e80300000d0100040001010070617261d4070000000000000000000000000000000000000000000000000000. Prerequisite: the parachain’s sovereign account must contain at least 20 DOT as collateral.

#45 Accept HRMP channel from Statemint