[XCM in SCs] Support cross-chain transfers for ERC-20 and ERC-721

[tiagobndr]

Support cross-chain transfers for ERC-20 and ERC-721

This issue is related to #6775

Background

With the arrival of smart contracts to Asset Hub, more assets will be deployed and managed via contracts instead of native runtime assets. However, AssetTransactor currently lacks the capability to handle assets controlled by smart contracts, making it impossible to teleport or perform reserve transfers of ERC-20 or ERC-721 tokens across chains.

Summary

Extend AssetTransactor to support cross-chain transfers (teleports & reserve transfers) for assets defined in smart contracts. This includes smart contracts implementing the ERC-20 and ERC-721 standards, ensuring they can be referenced using AssetId.

To enable seamless interoperability, we need to introduce adapters that allow these assets to be referenced using AssetIds, such as:

Example reference: [GlobalConsensus(Westend), Parachain(1000), AccountKey20(...)]

Task Breakdown:

• Implement adapters for smart contracts that implement both ERC-20 and ERC-721 token standards
• Extend AssetTransactor to handle teleports & reserve transfers for contract-based assets
• Testing & Validation