After Shell successfully processed the runtime upgrade to Statemint and handed over block production to the Statemint collators, they were not able to produce blocks due to a mismatch in key types. Specifically, Aura uses sr25519 keys to sign blocks, but the keys in the genesis chain spec were generated using ed25519.

A new runtime was created as a temporary fix. This runtime enables ed25519 in Aura for Statemint. This will be enacted on the Relay Chain so that validators will be able to validate the collator signatures. After the chain is producing blocks again, a follow up runtime upgrade will migrate Aura back to using sr25519 keys.

Call hash: `0x0e21b5233c7591ee89eca0cae71cf9a9a4c45fe2393075ab33361a673f5d322d`

Preimage:
![](https://i.imgur.com/pUVsJGR.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>
 - One DB clear.
 - One DB change.
 - One extra DB entry.
 # </weight>

- Problem Statement: The failure of Referendum 46 due to Polkadot not having a default XCM version set, affecting the first cross-chain interaction that Polkadot has had. The intended audience is the Polkadot community.
- Significance: The issue highlights a vulnerability in the Polkadot system, where the Relay Chain will not dispatch messages without a minimum safe version.
- Proposed Solution: The proposal includes the same two calls as Referendum 46, with an additional call to set the default XCM version of Polkadot to 2.
- Expected Outcomes: The successful implementation of this proposal will ensure the smooth operation of cross-chain interactions in Polkadot, enhancing the system's security and functionality.

#32 Fix Statemint - Aura Key Scheme