Query method for getting contract state

[leeduan]

Summary

Add query method for getting contract state

Problem Definition

There is no way to currently retrieve general contract state data: specifically admin address/denom without retrieving full encoded state data and parsing base64 key/value pairs to find info.

Proposal

Add a get contract state data query method.

---

For Admin Use

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