Asset Conversion Roadmap

[joepetrowski]

The Vision

Introduced in Statemint Update.

The primary goal of Asset Conversion is to close some vulnerabilities discovered by SR Labs that relate to using fixed balance conversion between DOT and other assets, even when they are sufficient. The number one priority for this feature is to enable fee payment in any asset such that the fee handler (i.e. the thing that sends fees to collators/treasury/burn/etc.) only receives the native asset (DOT).

Much of the initial work on this was done in paritytech/substrate#12984 and paritytech/substrate#14340. However, there are still many things to address.

The Plan

• Asset Conversion LPFee Should Use a Per{Something} Instead of u32 polkadot-sdk#88
• Add Benchmarking/Weights for Signed Extensions polkadot-sdk#87
• ChargeAssetTxPayment should accept multiple instances of Fungibles (may actually be sorted with LocalAndForeignAssets).
• ChargeAssetTxPayment Should Handle Fee Withdrawal Better When an Account Does Not Exist in System polkadot-sdk#86
• ChargeWeightInFungibles Should Use Asset Conversion Instead of Default BalanceToAssetBalance polkadot-sdk#105
• Configure Polkadot <> Kusama Bridge to Use Asset Conversion to Buy Execution polkadot-sdk#104
• Allow Asset Conversion Subscriptions polkadot-sdk#101
• [Asset Conversion] Incentives Extension polkadot-sdk#3149

Related

• Asset conversion nits cumulus#2860
• [asset-conversion] Add runtime api to polkadot-js/api polkadot-sdk#108
• pallet-asset-conversion: Decoupling Native Currency Dependancy polkadot-sdk#2031
• XCM WeightTrader: Swap Fee Asset for Native Asset polkadot-sdk#1845
• pallet-asset-conversion: Swap Credit polkadot-sdk#1677

[muharem]

Asset Conversion LPFee Should Use a Per{Something} Instead of u32

no plans so far

Add Benchmarking/Weights for Signed Extensions

no plans so far

ChargeAssetTxPayment should accept multiple instances of Fungibles (may actually be sorted with LocalAndForeignAssets).

already done

ChargeAssetTxPayment Should Handle Fee Withdrawal Better When an Account Does Not Exist in System

this now should be possible with swap credit implementation, but not planned.

ChargeWeightInFungibles Should Use Asset Conversion Instead of Default BalanceToAssetBalance

implementation is ready - paritytech/polkadot-sdk#1845
needs to be integrated into runtimes (planned with the next release)

Configure Polkadot <> Kusama Bridge to Use Asset Conversion to Buy Execution #104

should be done, when the item above is done

Allow Asset Conversion Subscriptions

We aim to have a merged (into polkadot-sdk) solution in 24Q2

[Asset Conversion] Incentives Extension

We aim to have a merged (into polkadot-sdk) solution in 24Q2

[joepetrowski]

Can we update the issues?

Add Benchmarking/Weights for Signed Extensions

no plans so far

Should become possible with paritytech/polkadot-sdk#2415