[XCM in SCs] Research existing cross-chain communication standards for SCs

[serban300]

Related to #6775

We should take a look on existing cross-chain communication standards for smart contracts:

• https://eips.ethereum.org/EIPS/eip-7683

[serban300]

Also looking on documentation related to some products that use this protocol in order to also see some implementation details and get a better overall understanding of the standard and of the use cases.

From what I understand so far, this is not a cross-chain communication standard for smart contracts. It's more of a bridging protocol that involves working with smart contracts. It also involves relayers, which, in our case, are not needed for parachain-to-parachain communication. So I'm not sure if it's relevant to our task. But I'm still investigating.

[tiagobndr]

@serban300 yeah I agree. For me, it sounds like an alternative in the Ethereum ecosystem to achieve cross-chain interoperability, where instead of sending messages back and forth using bridges, intents are signed by users and solvers/relayers take care of translating the intent into actions (transfers, etc) using their own assets. It's something that we might decide to explore in order to interop smoothly specifically with EVM chains in the future but I wouldn't say it's necessarily a dependency of our project, at least not in the way I see.