# Head Ambassador Removal

Tutorial on how to remove a current Head Ambassador. They need to appear in [this list](https://collectives.subsquare.io/ambassador/members) for it to work. Note that they can immediately re-apply after being removed.

## 1. Prepare the Preimage on the Collectives Chain
- Go to PolkadotJS and decode [this](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Frpc-collectives-polkadot.luckyfriday.io#/extrinsics/decode/0x460300f65f3cade8f68e8f34c6266b0d37e58a754059ca96816e964f98e17c795050730300) extrinsic.
- Click on `Submission` to modify the parameters:
- 
- Replace the addess `who` with the HA that you want to remove.
- Copy the `encoded call data` (not the hash!)
- This will look different for everyone.

## 2. Prepare the Preimage on the Relay chain
- Go to the Relay chain with [this](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Frockx-dot.w3node.com%2Fpolka-public-dot%2Fws#/extrinsics/decode/0x630004000100a50f04082f000006030300286bee42420f00b47265706c616365206d6520776974682074686520636f6c6c6563746976657320707265696d6167652064617461) link.
- Click on `Submission` again and paste the preimage from above in the `call: XcmDoubleEncoded` field in the bottom:
- Once you are done, again copy the `encoded call data` (not the hash!)

## 3. Place the preimage on the Relay Chain
- Go to `Developer->Extrinsic`
- Create a `Preimage::notePreimage(bytes)` extrinsic.
- The bytes are pasted from the relay preimage that we created above.
- 
- Click on `Submit Transaction`. Note that it will reserve a deposit for the preimage; having about 50 DOT on the address is a good idea.
- Go to `Governance->Preimages` and find your preimage there:
- It should look something like this:
- Copy the `Hash` and `Length` for later.
- If you want to double-check these values, you can go to `Developer->Storage` and query `Preimage::preimageFor` with these details. It should print the Relay Preimage that was pasted in there earlier:

## 4. Create Referendum
- Go to Subsquare track 13: https://polkadot.subsquare.io/referenda/tracks/13
- Click on `New Proposal`
- Paste in the preimage hash and length from above. This must be correct, otherwise it won't work!
- It should eventually produce this event:

## 5. Offboarding

- Last step is to offboard the HA from the `Core` pallet after they were removed from the Collective with [AmbassadorCore::offboard(who)](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Frpc-collectives-polkadot.luckyfriday.io#/extrinsics/decode/0x49066c9e3102dd2c24274667d416e07570ebce6f20ab80ee3fc9917bf4a7568b8fd2).
- Anyone can call this, but not root. Therefore you have to do this manually after the referendum passed.
- It should produce an event like this.

## 6. Testing

- Clone the [moonbeam-tools](https://github.com/Moonsong-Labs/moonbeam-tools) repo.
- Run a local chopstick fork of the Polkadot Relay and Collectives parachain with: `npx @acala-network/chopsticks@latest xcm -r polkadot -p polkadot-collectives`. For me locally this only works with `@0.12` instead of `@latest`, maybe a bug in Chopsticks.
- Run the proposal with: `npx ts-node src/tools/fast-execute-chopstick-proposal.ts --url ws://localhost:8001 --proposal-index NUMBER` Be sure to replace`NUMBER` with your referendum index.
- If you get a weird Javascript error, then try `npm install` first inside the repo.
- After doing this, do the Offboarding step 5.
- Check the state for `AmbassadorCore::members` and `AmbassadorCollective::members` that the HA was removed from both.