PSP23: Wallet Interaction Standard

[AndreasGassmann]

This PR adds a draft for the wallet interaction standard.

[Noc2]

The psp number should be 29. Could you update this? Once this is done. I would be happy to merge this as an initial draft to hopefully also kickstart a discussion.

[lamafab]

@AndreasGassmann Hi, sorry for the delayed response. I went through the document and have some initial thoughts (good document, overall):

• Shouldn’t id be an integer rather than a string?
• I think MessageType should be separated into two types: one for requests and one for responses (which results in changes to BaseMessage, respectively).
  • While most of the variants are self explanatory, a short description would be nice, for example what ”broadcast_request” means exactly.
• Interfaces that extend BaseMessage should probably not list fields like type, version, id and senderId again (I might be interpreting this wrongly, I haven't interacted with TypeScript that much).
• Consider putting network into BaseMessage?
  • Any interfaces that extend BaseMessage should therefore remove the network field.
• NetworkType is unspecified.
• If Network.rpcUrl is passed on, maybe mentioned that it must comply with some sort of standard?
• PermissionScope is missing ”broadcast_request”.

[takahser]

Suggested change

	- **PSP Number:** 23
	- **PSP Number:** 29

[takahser]

@AndreasGassmann ping