[ADD] notification standards

[Calcifer1001]

No description provided.

[evgenykuzyakov]

Item shouldn't include the message. Item is more like a pointer. It provides enough information to identify the given item. E.g. for a post it indicates the following:

• type = "social" - means it belongs to social DB
• path = "alice.near/post/main" - absolute path the item, in this case for alice.near
• blockHeight = 88260018 - the block height when the information at the path above is written, if omitted it means the same as the notification (for example when you post smth, you don't have a block height until it's saved).

[evgenykuzyakov]

Message can be included as part of the value, but not item

[evgenykuzyakov]

We don't have a schema for items yet, but we should add it. Example for url below:

Suggested change

	"value": {
	"type": "alert",
	"item": {
	"type": "social",
	"path": "https://near.gaming",
	"blockHeight": 88260018,
	"message": "It's your turn"
	}
	}
	"value": {
	"type": "alert",
	"item": {
	"type": "url",
	"path": "https://near.gaming",
	},
	"message": "It's your turn"
	}