Build Assertion 4: LIT Holder

[StamfordDigital]

Check whether any of the linked accounts holds a minimum amount (0.000001) of LIT NOW.

If TRUE, a VC should be generated and returned to the F/E. ?

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Old description obsolate：

Build Assertion 4: LIT Holder which will generate a Verifiable Credential (VC) if the following validates:

• Check the IDHub controller (user) holds LIT tokens
  • Important: A specific address must be provided and passed to the Parachain from the F/E using the params extrinsic param to verify this
• If the ruleset validates then a VC should be generated and returned to the F/E.

[jingleizhang]

Correct: this ruleset should test if “any of the linked accounts holds any LIT”. Not just the main address.

[Kailai-Wang]

This makes less sense though, as the main address has to hold some LIT to be able to send extrinsics at all. That's why I consider this rule a bit vague.

I suggest that we double-check it with Kayla or Rodrigo

[jingleizhang]

The actual workflow is:

• user calls the parachain extrinsic
• parachain&TEE knows this user’s main address (Litentry parachain address)
• because any active Litentry address needs to hold more than zero LIT tokens
• TEE queries user’s any other linked and verified address(e.g, ETH address, BSC address)
• and calculate ‘if they hold any LIT’, if true, TEE will generate a LIT Holder VC

[jingleizhang]

Reply from Rodrigo:

The end result is we want to have a VC that says the user is a LIT Holder. Originally I was told that it would be too “Expensive” or too much work to check all accounts, so a specific account would be better to check. But if all accounts is easier/better, lets do that!

For the user the Quest would be:

- Connect any account that holds LIT (if you don’t have any already connected)
- Generate a VC to show that you are a LIT Holder

so in the VC generation we could check all

[Kailai-Wang]

so in the VC generation we could check all

So it actually means we want to check if any linked account (so main account excluded) holds any LIT

[jingleizhang]

Tim gave the demo interface:

https://graph.tdf-labs.io/latest/graphql?query=query{VerifiedCredentialsIsHodler(%0A%[…]%22%0A%20%20minimumBalance%3A%200.00000056%0A){isHodler}}%0A

https://graph.tdf-labs.io/latest/graphql?query=query%7BVerifiedCredentialsIsHodler(%0[…]%20%20minimumBalance%3A%200.00000057%0A)%7BisHodler%7D%7D%0A

[BillyWooo]

Discussed with @kaylawangnow , this requirement will be merged with #1024 . Both are querying LIT. Only give different timestamp as parameter.