Throttle outgoing requests

[jbibla]

Is your feature request related to a problem? Please describe.

Voyager makes requests on every block (transactions, rewards). Sometimes this can result in too many outgoing requests.

If Voyager is disconnected, we also make requests every second to try to reconnect.

Describe the solution you'd like

We need a strategy for throttling outgoing requests to avoid using unnecessary resources for our users and to avoid spamming the Stargate APIs.

Additional context

[fedekunze]

I think we could start by querying the txs optimistically with a 6s timeout after we send a tx

[fedekunze]

instead of querying every block

[fedekunze]

ok we can subscribe to new txs events via Tendermint. I don't know yet if we can provide any other type of tag or address tho

[jbibla]

i'm not sure i understand your proposal @fedekunze. are you suggesting we subscribe to tx events in tendermint and query the REST API if there are new transactions?