Cosmos-SDK simple governance application

happygopher · November 13, 2018, 9:54pm

Hi guys! I need your help!

I’m following the docs to build a simple governance application (https://cosmos.network/docs/sdk/sdk-by-examples/simple-governance/simple-gov-module.html)

I know that the docs are a little out of date and Cosmos SDK API has changed a little, but I almost made it work by looking at a more fresh example at https://github.com/cosmos/sdk-application-tutorial.

When I try to cast a vote I get an error: “Delegator does not contain this delegation”. The error occurs at the following line:

github.com

cosmos/cosmos-sdk/blob/bf5aa434bb623270a410b4d0011edfbdcc85b9d8/examples/simpleGov/x/simple_governance/handler.go#L129


	proposal, err := k.GetProposal(ctx, msg.ProposalID)
	if err != nil {
		return err.Result()
	}


	if ctx.BlockHeight() > proposal.SubmitBlock+votingPeriod ||
		!proposal.IsOpen() {
		return ErrVotingPeriodClosed().Result()
	}


	delegatedTo := k.sm.GetDelegations(ctx, msg.Voter, 10)


	if len(delegatedTo) <= 0 {
		return stake.ErrNoDelegatorForAddress(stake.DefaultCodespace).Result()
	}
	// Check if address already voted
	voterOption, err := k.GetVote(ctx, msg.ProposalID, msg.Voter)
	if voterOption == "" && err != nil {
		// voter has not voted yet
		for _, delegation := range delegatedTo {
			bondShares := delegation.GetBondShares().EvaluateBig().Int64()

Could anybody explain to me what’s going on here and how to fix it, please?

Prove me wrong. If I get it correctly I need to somehow let my application know about a validator in order to make it work. If so, how can I do it on my local machine?

jack · November 14, 2018, 4:21pm

Hey @happygopher! The simple_goverance application is pretty out of date. We are, however, maintaining the sdk-application-tutorial does that one work for you?

happygopher · November 14, 2018, 7:10pm

Yeah, I know As I mentioned it in my message, I’m trying to build the simple governance application using the sdk-application-tutorial as a skeleton. I hacked it a little and almost made it work, the only thing I’m struggling is that I don’t know how to make delegations work The thing is that the delegation part is not covered by sdk-application-tutorial

Btw, I’ve committed everything I’ve done so far in my own repo. So to be more precise, I don’t know how to prevent the error at the following line from happening:

github.com

screwyprof/testgov/blob/e9f1279518af918dc634d9244038d3829aaef496/x/testgov/handler.go#L67


	if err != nil {
		return err.Result()
	}


	if !proposal.IsOpen() || ctx.BlockHeight() > proposal.SubmitBlock+votingPeriod {
		return ErrVotingPeriodClosed().Result()
	}


	delegatedTo := k.stakeKeeper.GetDelegatorDelegations(ctx, msg.Voter, 10)
	if len(delegatedTo) <= 0 {
		return stake.ErrNoDelegatorForAddress(stake.DefaultCodespace).Result()


		// TODO: Find it out how to prevent this error
		// see https://forum.cosmos.network/t/cosmos-sdk-simple-governance-application/1325
		// Magic


		//valPriv := ed25519.GenPrivKey()
		//valAddress, err := sdk.ValAddressFromHex(valPriv.PubKey().Address().String())


		// `testgovd tendermint show-validator`
		//valAddress, err := sdk.ValAddressFromBech32(

It would be great if someone could help me with it What I basically need is to learn more about stake module and how to tell my application to get the delegations

happygopher · November 20, 2018, 12:13pm

I’ve finally made it work All really needed is to create a validator. I’ve committed the changes and updated the docs. Current version is available on GitHub screwyprof/testgov (the forum doesn’t allow posting a link for some reason)

09qw123 · December 17, 2018, 10:04am

link to repo mentioned above