This will be a batch of two scheduled transactions. They would probably work fine at once, but will schedule to be safe and ensure that the `set_storage` takes place prior to authorizing the upgrade.

The first will set some storage keys in Shell for Statemint's "genesis". The second will authorize the upgrade to Statemint. Both calls need to be constructed on Shell and then dispatched from the Relay Chain in an XCM.

See the [release notes](https://github.com/paritytech/cumulus/releases/tag/statemint-v6.0.1) to review the assets, reproduce the `set_storage` call, and generate the runtime.

## Shell Constructions

### Set Storage

The `set_storage` call can be generated with the `build-spec` command from a collator node, using `statemint_genesis.json` as input. See the release notes for more info. Notable storage items include:

- Setting the first set of Aura collators.
- Setting the `SafeXcmVersion` to `2` to protect against older XCM formats.

Call data (statemint_genesis_values.scale):

```
0x0006908015464cac3378d46f113cd5b7a4d71c84476f594316a7dfe49c1f352d95abdaf110000000008015464cac3378d46f113cd5b7a4d71c844e7b9012096b41c4eb3aaf947f6ea4290800008015464cac3378d46f113cd5b7a4d71c845579297f4dfb9609e7e4c2ebab9ce40a0502104c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d5421c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d7811c5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b7620b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b38015464cac3378d46f113cd5b7a4d71c84579f5a43435b04a98d64da0cefe185054000a0acb9030000000000000000000000801809d78346727a0ef58c0fa03bafa3234e7b9012096b41c4eb3aaf947f6ea42908000080267ada16405529c2f7ef2727d71edbde4e7b9012096b41c4eb3aaf947f6ea429080000083a6300803c311d57d4daf52904616cf69648081e4e7b9012096b41c4eb3aaf947f6ea429080000803c311d57d4daf52904616cf69648081e5e0621c4869aa60c02be9adcc98a0d1d0502104c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d5421c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d7811c5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b7620b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b3803f1467a096bcd71a5b6a0c8155e208104e7b9012096b41c4eb3aaf947f6ea4290800008057f8dc2f5ab09467896f47300f0424384e7b9012096b41c4eb3aaf947f6ea4290800008057f8dc2f5ab09467896f47300f0424385e0621c4869aa60c02be9adcc98a0d1d0502104c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d5421c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d7811c5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b7620b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b3805e8a19e3cd1b7c148b33880c479c02814e7b9012096b41c4eb3aaf947f6ea42908000080682a59d51ab9e48a8c8cc418ff9708d24e7b9012096b41c4eb3aaf947f6ea429080000807474449cca95dc5d0c00e71735a6d17d4e7b9012096b41c4eb3aaf947f6ea429080000807b3237373ffdfeb1cab4222e3b520d6b4e7b9012096b41c4eb3aaf947f6ea42908000080c2261276cc9d1f8598ea4b6a74b15c2f308ce9615de0775a82f8a94dc3d285a1040180c2261276cc9d1f8598ea4b6a74b15c2f4e7b9012096b41c4eb3aaf947f6ea42908000080c2261276cc9d1f8598ea4b6a74b15c2f57c875e4cff74148e4628f264b974c80400000000000000000000000000000000080cd5c1f6df63bc97f4a8ce37f14a50ca74e7b9012096b41c4eb3aaf947f6ea4290800002101cec5070d609dd3497f72bde07fc96ba04c014e6bf8b8c2c011e7290b85696bb30b1aeeca675702f24c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d5421804c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d54212101cec5070d609dd3497f72bde07fc96ba04c014e6bf8b8c2c011e7290b85696bb314f6a7e973c2c34dc5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b76280c5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b7622101cec5070d609dd3497f72bde07fc96ba04c014e6bf8b8c2c011e7290b85696bb34cb6fa5260704ee40b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b3800b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b32101cec5070d609dd3497f72bde07fc96ba04c014e6bf8b8c2c011e7290b85696bb35242002c980f9df1c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d781180c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d781180cec5070d609dd3497f72bde07fc96ba04e7b9012096b41c4eb3aaf947f6ea4290800003501cec5070d609dd3497f72bde07fc96ba0726380404683fc89e8233450c8aa19502fe5f80e8854f64761757261804c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d5421804c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d54213501cec5070d609dd3497f72bde07fc96ba0726380404683fc89e8233450c8aa1950a3f059d7e690a34f6175726180c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d781180c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d78113501cec5070d609dd3497f72bde07fc96ba0726380404683fc89e8233450c8aa1950c41649dd3c9d26696175726180c5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b76280c5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b7623501cec5070d609dd3497f72bde07fc96ba0726380404683fc89e8233450c8aa1950fa571e62466b970561757261800b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b3800b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b380cec5070d609dd3497f72bde07fc96ba088dcde934c658227ee1dfafcd6e169030502104c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d5421c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d7811c5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b7620b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b380cec5070d609dd3497f72bde07fc96ba0e0cdd062e6eaf24295ad4ccfc41d46090504104c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d54214c3d674d2a01060f0ded218e5dcc6f90c1726f43df79885eb3e22d97a20d5421c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d7811c7d7d38d16bc23c6321152c50306212dc22c0efc04a2e52b5cccfc31ab3d7811c5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b762c5c07ba203d7375675f5c1ebe70f0a5bb729ae57b48bcc877fcc2ab21309b7620b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b30b2d0013fb974794bd7aa452465b567d48ef70373fe231a637c1fb7c547e85b380d57bce545fb382c34570e5dfbf338f5e4e7b9012096b41c4eb3aaf947f6ea42908000080d5e1a2fa16732ce6906189438c0a82c64e7b9012096b41c4eb3aaf947f6ea42908000080e38f185207498abb5c213d0fb059b3d84e7b9012096b41c4eb3aaf947f6ea42908000080e38f185207498abb5c213d0fb059b3d86323ae84c43568be0d1394d5d0d522c4100200000080f0c365c3cf59d671eb72da0e7a4113c44e7b9012096b41c4eb3aaf947f6ea429080000
```

### Authorize Upgrade

This message authorizes the upgrade of Shell to a runtime with a given hash (statemint_runtime-v601.compact.compressed.wasm). Once the upgrade is authorized, anyone can submit the runtime via `parachain_system.enact_authorized_upgrade`, and it will upgrade 600 blocks (approximately 1 hour) later.

Call data: `0x0103af49687b93d91fc08c1fcea1001d724a95c533a949019645d3e4179beedbf67e`

![](https://i.imgur.com/rHrTJRx.png)

## Polkadot Proposal

This proposal is to schedule these messages to dispatch from Polkadot to Shell. They will dispatch 5 and 20 blocks after enactment to ensure each is processed separately. We give them plenty of weight (100 billion and 1 billion, respectively) to ensure they execute.

Call hash: `0xa6830793b6a3473f66fbd7305a9e330dd2dd688df0e8fcbd0c9ff08d28040a34`

![](https://i.imgur.com/5D8syF9.png)
![](https://i.imgur.com/YmVC8o3.png)


Schedule the currently externally-proposed majority-carries referendum to be tabled
immediately. If there is no externally-proposed referendum currently, or if there is one
but it is not a majority-carries referendum then it fails.

The dispatch of this call must be `FastTrackOrigin`.

- `proposal_hash`: The hash of the current external proposal.
- `voting_period`: The period that is allowed for voting on this proposal. Increased to
  `FastTrackVotingPeriod` if too low.
- `delay`: The number of block after voting has ended in approval and this should be
  enacted. This doesn't have a minimum amount.

Emits `Started`.

Weight: `O(1)`

Send a batch of dispatch calls.

May be called from any origin.

- `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 call are dispatch 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>

This will return `Ok` in all circumstances. To determine the success of the batch, an
event is deposited. If a call failed and the batch was interrupted, then the
`BatchInterrupted` event is deposited, along with the number of successful calls made
and the error of the failed call. If all were successful, then the `BatchCompleted`
event is deposited.

- There are two scheduled transactions that need to be done in a safe way.
- The first transaction sets some storage keys in Shell for Statemint's "genesis".
- The second transaction authorizes the upgrade to Statemint.
- These transactions need to be constructed on Shell and then dispatched from the Relay Chain.
- A proposal has been made to schedule these transactions to be dispatched from Polkadot to Shell.

#28 Upgrade Shell to Statemint