Restrict marker send(including bank send) and marker transfer based on the presence of a certain attribute or attributes

[arnabmitra]

Summary

Restrict marker send(including bank send) and marker transfer based on the presence of a certain attribute/attributes

Problem Definition

As a marker admin, i may only want a send of a non restricted marker to another user (normal bank send) if and only if they(receiver) has a certain attribute. This assumes that a withdraw also enforces the attribute check so that the sender always has that attribute(maybe optional?)
For a restricted marker want the same, except the path is via marker transfer

Why do we need this feature?

To help Dapps/SC's restrict transfers with greater checks. e.g only let transfer/sends to happen to kyc'ed parties.

What benefits does the Provenance Network stand to gain by including this feature?

Right now SC's/Dapps are checking this at their level, this makes it a protocol level feature.

Are there any disadvantages of including this feature?

More complexity and more paths to check.

Proposal

1.Leverage bank send restrictions put in by another PR to achieve this for non restricted markers.
2.Add checks on marker#transfer method to also achieve above.
3. ibc-go may need a check too, but i am unclear.
4.SC flow should be automatically achieved if 1 & 2 are implemented i think.

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For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned

[arnabmitra]

duplicate #1256