Use GraphQL instead of REST APIs

[RiccardoM]

Currently the application is relying on the REST APIs of the chain to fetch the data about the balance of an account or else. Instead, I think it would be better to use the GraphQL endpoints to also be able to subscribe to changes automatically. Here are the details of the endpoint that you can use:

• Mainnet: gql.mainnet.desmos.network
• Testnet: gql.morpheus.desmos.network

You should be able to query data without any authentication. If you need access to the console, you can find the details on Bitwarden.

[ale-mazz]

I think this has already been implemented, am I right @manu0466?

[RiccardoM]

Closing this as it's already implemented