SignBytes serialization for all governance transaction wasn't standardized

[faboweb]

Summary of Bug

See #3336

This apparently wasn't fixed for governance transactions.

Gaia commit: 30aebc1173ed6dae2848d1e845ec2f4e22750355

Steps to Reproduce

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[alexanderbez]

What makes you say this @faboweb? Just took a look at the latest develop and the commit you mentioned and all the GetSignBytes look correct to me:

e.g.

func (msg MsgSubmitProposal) GetSignBytes() []byte {
	bz := msgCdc.MustMarshalJSON(msg)
	return sdk.MustSortJSON(bz)
}

Each of the three total x/gov messages uses msgCdc.MustMarshalJSON(msg).

[faboweb]

Because I needed to re-add the hack to remove {type, value} from the message for the created signature to be accepted.

See: https://github.com/cosmos/voyager/blob/develop/app/src/renderer/scripts/wallet.js#L85
Needed on commit: 30aebc1173ed6dae2848d1e845ec2f4e22750355

[alexanderbez]

@faboweb so sorry, I completely didn't realize x/gov does NOT register these types via an init call. Thank you. Trivial fix.

[faboweb]

Thx for the effort.

[ZhiyuHelloWorld]

thanks 👍