Split GET delegators/{address} endpoint

[fedekunze]

Summary

Split the logic of GET stake/delegators/{delegatorAddress} into 3 endpoints:

• GET stake/delegators/{delegatorAddress}/delegations
• GET stake/delegators/{delegatorAddress}/unbonding_delegations
• GET stake/delegators/{delegatorAddress}/redelegations

Problem Definition

One of the problems of the bad performance of the delegator endpoint (described in detail in #2009) is due to the fact that it concentrates the logic of 3 different endpoints in a single DelegationSummary which is returned to the client:

// aggregates of all delegations, unbondings and redelegations
type DelegationSummary struct {
	Delegations          []Delegation          `json:"delegations"`
	UnbondingDelegations []UnbondingDelegation `json:"unbonding_delegations"`
	Redelegations        []Redelegation        `json:"redelegations"`
}

Also the current name of the endpoint does not describe the logic of the endpoint. One would expect from GET stake/delegators/{delegatorAddress} to obtain the information of a delegator and not a DelegatorSummary, but since a delegator is just a mere AccAddress there's no point on keeping that endpoint.

Proposal

1. Split the logic of GET stake/delegators/{delegatorAddress} into 3 endpoints:

• GET stake/delegators/{delegatorAddress}/delegations:
• GET stake/delegators/{delegatorAddress}/unbonding-delegations
• GET stake/delegators/{delegatorAddress}/redelegations

This will require to create 3 new queriers for each of this endpoints.

2. Get rid of GET stake/delegators/{delegatorAddress}

cc: @jackzampolin @faboweb @alexanderbez

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[alessio]

I'd second this 👍

[alexanderbez]

++

[faboweb]

I doubt that this solves the problem. Do we have any metrics that proof that this will reduce the time until we have all the data?

[jackzampolin]

Sounds like there is consensus here. Is there any work on implementation here?