## TL:DR
The following proposal registers aUSD (Acala Dollar on Karura) as a XCM fee token on Moonriver.

## Summary
We propose allowing XCM execution fee payment to be done with the aUSD token (Acala Dollar on Karura). 

Before, to move aUSD to Moonriver, users would need to provide a bit of KAR (Karura Token) to pay for XCM execution. This is because it was initially not registered as an XCM execution fee token (check [Proposal 79](https://moonriver.polkassembly.network/referendum/79)).

However, as aUSD can also be considered the native token for Karura, we propose that it should be enabled to pay for XCM execution. The *unitsPerSecond* was set to *20670000000000* accounting for the price/*unitsPerSecond* for KSM at the time of writing

## Proposal
Proposal #82 with the following hash: *0x84decba85acb6b4928e05fe30e089531762aff3cd6a143bc8de80fd931c74337*

## Technical details:
The procedure to set a new XCM execution fee token on Moonriver is by executing a single extrinsic:

 - *assetManager.setAssetUnitsPerSecondt* where the multilocation of the asset is provided, and the units per second set.

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

**batchAll:**
0x67000101000204037929030200000000


Change the amount of units we are charging per execution second for a given AssetType

:
- This proposal registers aUSD (Acala Dollar on Karura) as a XCM fee token on Moonriver
- Before, users needed to provide KAR (Karura Token) to pay for XCM execution, as aUSD was not initially registered as an XCM execution fee token. 
- The proposal sets the *unitsPerSecond* to *20670000000000* to account for the price/*unitsPerSecond* for KSM at the time of writing
- The procedure to set a new XCM execution fee token is by executing an extrinsic - *assetManager.setAssetUnitsPerSecondt*  
- The hex-encoded call data of the proposal is: 0x67000101000204037929030200000000

#82 Register Acala Dollar (aUSD) as a XCM Fee Token on Moonriver