research: cross-chain interactions (XCM)

[jmg-duarte]

One of the core ideas is that our chain operates solely using DOT.

To work towards that goal we need to research how to interact with other parachains and offer such interface.

The aim for this task is to discover what kind of interface we need to expose and how.

XCM and XCMP are the "entrypoints":

• https://wiki.polkadot.network/docs/learn-xcm
• https://wiki.polkadot.network/docs/learn-xcm-transport

[jmg-duarte]

To work solely over DOT we can offer transfer and/or teleport

• Transfer should work "without trust"
• Teleport only works with bidirectional trust — being the "standard" way of transferring assets between system chains

To fully implement teleport we first need to reach system parachain status, until then, we'd have support from outsider sources on getting those details to work.

As such, we can:

• Remove teleport for now
• Focus on keeping our chain DOT only
• Implement transferring DOT from the relay chain to our parachain