R4R: generalize query response with height #4573

colin-axner · 2019-06-17T22:22:05Z

Addition to #4536, no longer specific to account queries. Allows for validator endpoints to return height in the response. closes #4609

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Linked to github-issue with discussion and accepted design OR link to spec that describes this work.
Wrote tests
Updated relevant documentation (docs/)
Added a relevant changelog entry: clog add [section] [stanza] [message]
rereviewed Files changed in the github PR explorer

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codecov · 2019-06-17T22:47:36Z

Codecov Report

Merging #4573 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4573      +/-   ##
==========================================
+ Coverage   52.65%   52.66%   +0.01%     
==========================================
  Files         261      261              
  Lines       16410    16410              
==========================================
+ Hits         8640     8642       +2     
+ Misses       7124     7122       -2     
  Partials      646      646

codecov · 2019-06-17T22:47:37Z

Codecov Report

Merging #4573 into master will increase coverage by 0.1%.
The diff coverage is 64%.

@@            Coverage Diff            @@
##           master    #4573     +/-   ##
=========================================
+ Coverage   53.62%   53.72%   +0.1%     
=========================================
  Files         260      260             
  Lines       16177    16197     +20     
=========================================
+ Hits         8675     8702     +27     
+ Misses       6856     6846     -10     
- Partials      646      649      +3

.pending/improvements/sdk/4573-adds-height-in-

types/rest/rest.go

alessio

I'd appreciate some test cases

types/rest/rest.go

alexanderbez

This is API breaking for all endpoints that will do this. Is this intended? If so, we must make sure swagger is also updated.

x/distribution/types/delegator.go

alexanderbez

Tested. There is nothing that actually sets the height @colin-axner.

e.g.

	res, _, err := ar.querier.QueryWithData(fmt.Sprintf("custom/%s/%s", QuerierRoute, QueryAccount), bs)
	if err != nil {
		return nil, err
	}

Where do we set the height when returning the result?

colin-axner · 2019-06-24T22:38:09Z

@alexanderbez ohh yea... There are a few other places this happens as well where a helper function does the data retrieval and just returns the result/error. Seems to me, if you want height to be returned in a response, then it it needs to be passed all the way down to the client. This would mean changing GetAccount to return height, as well as any other data retrieval functions to always return result, height, error. Should I update it to this format?

alexanderbez · 2019-06-24T23:21:37Z

@colin-axner not sure I completely follow, but this is what needs to happen I think:

Remove the recently added AccountWithHeight custom type and logic (essentially revert the PR)
Update all relevant query REST handlers as follows:

res, _, err := cliCtx.QueryWithData(route, bz)
if err != nil {
    rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
    return
}

rest.PostProcessResponse(w, cliCtx, res)

Now becomes:

res, height, err := cliCtx.QueryWithData(route, bz)
if err != nil {
    rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
    return
}

cliCtx = cliCtx.WithHeight(height)
rest.PostProcessResponse(w, cliCtx, res)

I know (2) will be a huge PIA, but this is how we get the responses to have the height.

Does this make sense?

colin-axner · 2019-06-24T23:44:32Z

@alexanderbez Both those have been done, I think the issue is here where you have:

account, err := accGetter.GetAccount(addr)
if err != nil {
	rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
	return
}

rest.PostProcessResponse(w, cliCtx, account)

because GetAccount() doesn't return height and therefore (2) can't be done to set the height in context

alexanderbez · 2019-06-25T12:50:04Z

@colin-axner phenomenal, just checked and you're correct -- my mistake!

Wrt to the account query, I guess this is a special case huh? No biggie, let's update AccountRetriever to also include a GetAccountWithHeight method.

colin-axner · 2019-06-25T19:08:04Z

@alexanderbez updated, the only issue is not all of the gov endpoints will return the query height. I can't find a work around for querying with tags without rewriting a lot of code. If these endpoints query for a specific height then the height will be included in the response. If they are querying using the latest height then the height won't be included because it is not set.

Specifically in QueryByTxsTags can't return height because:

resTxs, err := node.TxSearch(query, prove, page, limit)
if err != nil {
	return nil, err
}

does not return height.

Furthermore, a lot of the gov endpoint code is intermixed with searching by tags like the following:

if !(propStatus == types.StatusVotingPeriod || propStatus == types.StatusDepositPeriod) {
	res, err = gcutils.QueryDepositsByTxQuery(cliCtx, params) // calls QueryByTxsTags
} else {
	res, _, err = cliCtx.QueryWithData("custom/gov/deposits", bz)
}

fedekunze · 2019-06-25T21:28:00Z

@colin-axner yeah, we need to refactor those queries

fedekunze

LGTM

types/rest/rest_test.go

Co-Authored-By: Federico Kunze <31522760+fedekunze@users.noreply.github.com>

alexanderbez

ACK -- great job @colin-axner!

wrt to the specific governance queries, there is nothing we can do. Those specific type of queries were requested by the community and are "special" because they're ad-hoc and do tag (event) based queries underneath the hood. By definition the results can all have various heights. This PR is good as-is 👍

fedekunze · 2019-06-28T20:55:14Z

is this PR blocked?

alexanderbez · 2019-06-30T20:13:12Z

Nope, just need another ACK from @alessio

alessio

Something major needs fixing

alessio · 2019-06-30T22:46:39Z

types/rest/rest_test.go

 "github.com/cosmos/cosmos-sdk/types"
+ authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"


Top level packages must not depend on x sub packages.

Offf, good catch -- I missed this!

We can probably remove this test all together @colin-axner and move it to the LCD tests in Gaia.

We don’t need LCD tests for queries as those are covered by the contract tests

Makes sense, should I remove and move the tests elsewhere or should I refactor the test to use a mock version of account?

I like the latter

alexanderbez · 2019-07-01T13:00:58Z

types/rest/rest_test.go

 "github.com/cosmos/cosmos-sdk/types"
+ authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"


Offf, good catch -- I missed this!

alexanderbez · 2019-07-01T13:02:25Z

types/rest/rest_test.go

 "github.com/cosmos/cosmos-sdk/types"
+ authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"


We can probably remove this test all together @colin-axner and move it to the LCD tests in Gaia.

…ner/cosmos-sdk into colin/generalize-height-queries

alexanderbez

ACK

alessio

Nice one!

colin-axner added 2 commits June 17, 2019 15:16

add height in validator endpoint response

60e0267

generalize response with height

bb1a498

colin-axner requested review from alessio, alexanderbez, jackzampolin and rigelrozanski as code owners June 17, 2019 22:22

pending log

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alexanderbez added T: API Breaking Breaking changes that impact APIs and the SDK only (not state machine). ready-for-review labels Jun 18, 2019

beginning part of test for rest

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alexanderbez added the S:blocked Status: Blocked label Jun 20, 2019

updated postprocessresponse to encode in height, added wip test

62fcc39

colin-axner closed this Jun 21, 2019

colin-axner mentioned this pull request Jun 21, 2019

Returning height in JSON Response #4609

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colin-axner added 5 commits June 21, 2019 11:34

added passing postprocessresponse test

8aacfa5

merge and updated post process response call to include height

fd4e7f3

update delegator json tag

3a61eb7

revert indenting to two spaces

cc115ef

update pending log

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colin-axner reopened this Jun 21, 2019

fix function comment

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colin-axner commented Jun 21, 2019

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x/distribution/types/delegator.go Show resolved Hide resolved

rm unused fmt import

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height set in ctx instead of passed in func

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alexanderbez suggested changes Jun 24, 2019

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add GetAccountWithHeight

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colin-axner added 2 commits June 25, 2019 12:12

fix merge conflict

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fix build errors

8d06eb0

fedekunze approved these changes Jun 25, 2019

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misspelling

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Co-Authored-By: Federico Kunze <31522760+fedekunze@users.noreply.github.com>

alexanderbez approved these changes Jun 26, 2019

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alexanderbez requested a review from alessio June 26, 2019 12:21

rigelrozanski mentioned this pull request Jun 26, 2019

CI Bot: Autopost a Changelog Preview #4627

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colin-axner mentioned this pull request Jun 28, 2019

supply querier #4592

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colin-axner added 2 commits July 1, 2019 09:36

address @alessio pr comments; remove x/auth dependency

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Merge branch 'colin/generalize-height-queries' of github.com:colin-ax…

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…ner/cosmos-sdk into colin/generalize-height-queries

alexanderbez requested a review from alessio July 1, 2019 16:43

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alessio merged commit 8d8fd9d into cosmos:master Jul 1, 2019

alexanderbez mentioned this pull request Jul 24, 2019

Correctly Returning Height in Queries #4773

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colin-axner mentioned this pull request Aug 1, 2019

Add cli commands for the coinswap module. #4719

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R4R: generalize query response with height #4573

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		"github.com/cosmos/cosmos-sdk/types"
		authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"

R4R: generalize query response with height #4573

R4R: generalize query response with height #4573

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