Add estimated_inbound and estimated_outbound values in sip10 tokens balances

[alter-eggo]

Is your feature request related to a problem? Please describe.
Actual problem is already described in this issue
We need to do 2 requests to get available balance

Describe the solution you'd like
Solution is to add estimated_inbound and estimated_outbound values in sip10 tokens balance request response, same as for stx balance

[zone117x]

It doesn't look like we can do this for FTs like we can for STX transfers. A plain, non-evaluated stx-transfer type transaction in the mempool directly indicates the STX transfer amounts. However, FT transfers happen after a transaction is executed. In other words, the arbitrary contract-call and contract-deploy type txs in the mempool are opaque with regards to their eventual evaluated outcome (e.g. FT transfers).

@rafaelcr did you have any thoughts around how some way to work around this?

[rafaelcr]

Good point @zone117x . I don't think we're going to be able to do this without the node giving us more information about pending transactions, which would require a big change on their end.

@alter-eggo unfortunately we won't be able to build this feature.

[alter-eggo]

I see, ok