Please note this motion replaces motion 256 due to an error on the proposal weight and motion 257 due to an error downgrading the call from the relay chain to native: the proposal fixes both mistakes.

Five more parachains have requested an HRMP channel with Statemint. This motion accepts them all and opens return channels.

Handy Info

• Treasury Address: 13UVJyLnbVp9RBZYFwFGyDvVd1y27Tt8tkntv6Q7JVPhFsTB

• Treasury AccountId: 0x6d6f646c70792f74727372790000000000000000000000000000000000000000

• Statemint Address: 13YMK2edbuhwMBxeUWm9c643A2wyYHwSVh1bCM7tShtg7Dtk

• Statemint AccountId: 0x70617261e8030000000000000000000000000000000000000000000000000000

• Parachains that aim to open channels: 2021, 2031, 2032, 2035, 2046.

Call Construction

These are constructed backwards. That is, the call to use as the proposal is at the end.

Relay Chain Call to Execute

First, we need the call that Statemint will execute on the Relay Chain. This accepts all channel requests and returns channel requests to the initiators.

• Encoded Call Data (Polkadot):

0x1a02283c01e50700003c01ef0700003c01f00700003c01f30700003c01fe0700003c00e5070000e8030000009001003c00ef070000e8030000009001003c00f0070000e8030000009001003c00f3070000e8030000009001003c00fe070000e803000000900100

Message from Statemint

The above message needs to come from Statemint. So we put it into an XCM (the “Transact” instruction) along with purchasing some execution capacity and returning any leftover fees to the Treasury.

• Encoded Call Data (Statemint):

0x1f0001010002140004000000000700c817a80413000000000700c817a80400060002286bee9d011a02283c01e50700003c01ef0700003c01f00700003c01f30700003c01fe0700003c00e5070000e8030000009001003c00ef070000e8030000009001003c00f0070000e8030000009001003c00f3070000e8030000009001003c00fe070000e803000000900100140d01010000000004000101006d6f646c70792f74727372790000000000000000000000000000000000000000

Proposal on the Relay Chain

But, governance is on the Relay Chain, not Statemint. So take some DOT from the Treasury (100 DOT for 10 channels at 10 DOT each plus 2 DOT for fees) and send a message to Statemint telling it to send a message back. This is the proposal to vote on.

• Encoded Call Data (Polkadot):

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

• Call Hash: 0xfa5da8a4d9ef08dd22dfbc189861cbb9275dc8c52e4ce9b04f21cc830b3d5617

Preimage has already been submitted for verification by the community as well. After/if Council votes and passes this proposal, this will need to be voted by the community in referenda queue.