Staking sections self DDoSes

[okwme]

UI Version: 0.7.0

Description: Polling each validator for amount of user's stake DDoSes the LCD and often crashes gaia causing a reconnect. This happens on mounted event for the staking page as well as wallet page with the action updateDelegates.

[mappum]

Update LCD to make it possible to do this in one combined request

[fedekunze]

@faboweb This could effectively be resolved by changing the endpoints we are using (latest delegator set + delegations for each of the address, which is what makes voyager self DDoS) for
GET /stake/validators and
GET /stake/delegators/{delegatorAddr}/validators which is currently on hold by cosmos-sdk/1939.
I'll start working on it since it's a priority as discussed with @okwme .

[faboweb]

isn't this resolved by #1068 ?

[fedekunze]

No, since it's still querying every delegation instead of the delegator's validators

[fedekunze]

@faboweb this will reduce the requests to just 2 instead of running a for loop though all the addresses of the latest validator set to ask if there's a delegation

[faboweb]

In #1068 it is implemented like that:

• query all delegations a delegator has via one call to /stake/delegators/{addr}
• query all candidates via one call to /stake/validators
• map delegations to candidats

Am I missing something?