Cosmos-sdk: Bad genesis validation error

[cbarraford]

Summary of Bug

When validating my genesis.json file, i get an error that doesn't really help me to understand the problem.

$ skyyd validate-genesis
validating genesis file at /Users/cbarraford/.skyyd/config/genesis.json
ERROR: error validating genesis file /Users/cbarraford/.skyyd/config/genesis.json: UnmarshalJSON cannot decode empty bytes

Here is the genesis file.
https://gist.github.com/cbarraford/45edb0e0e6d7f206c6dee1751d617188

Version

0.37

Steps to Reproduce

validate the attached genesis file

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[cbarraford]

Btw, my genesis.json was missing...

"supply": {
            "supply": []
        },

This file was generated from skyyd export, so maybe theres a bug in the export genesis code.

[cbarraford]

also, my genutil was wrong.

was this

"genutil": null,

should be ...

 "genutil": {
        "gentxs": null
    },

[alexanderbez]

the default value for gentxs should be []. I'm not too sure why supply is missing, but should also default to the empty value.

[cbarraford]

just a stab in the dark, but i'd guess that the code isn't init'ing the variable right.

This will create null

var gentxs []gentx

vs this will create []

gentxs := make([]gentx, 0)

[alexanderbez]

correct, we need to make sure gentxs default to gentxs := make([]gentx, 0)

[alexanderbez]

This is still happening. Need to fix ASAP.

[k]

Yes this needs to be fixed, I got stuck on this for a good hour because of genutil was not being formatted correctly

[alexanderbez]

@k would you be willing to instead fix the issue here and open a PR in the SDK? We'd be happy to review and merge.

[cbarraford]

@alexanderbez not confident i'm approaching this right, but here is a stab at the problem.

[alexanderbez]

I don't follow @cbarraford? This is the only approach AFAIK, what is the alternative?

[cbarraford]

@alexanderbez i like the approach you have in your PR better than mine. Good work!

[alexanderbez]

:)

That being done, I still wonder if we should include your PR. That is, if genesis state constructors should set slices to empty when they're nil. WDYT @fedekunze ?

[cbarraford]

I'll follow your lead on this. Happy to make any further changes to the PR, if needed