refactor: add burnable params to governance

CHANGELOG.md

@@ -78,6 +78,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (x/bank) [#14894](https://github.com/cosmos/cosmos-sdk/pull/14894) Return a human readable denomination for IBC vouchers when querying bank balances. Added a `ResolveDenom` parameter to `types.QueryAllBalancesRequest` and `--resolve-denom` flag to `GetBalancesCmd()`.
 * (x/groups) [#14879](https://github.com/cosmos/cosmos-sdk/pull/14879) Add `Query/Groups` query to get all the groups.
 * (x/genutil,cli) [#15147](https://github.com/cosmos/cosmos-sdk/pull/15147) Add `--initial-height` flag to cli init cmd to provide `genesis.json` with user defined initial block height
+* (x/gov) [#15151](https://github.com/cosmos/cosmos-sdk/pull/15151) Add `burn_vote_quorum`, `burn_proposal_deposit_prevote` and `burn_vote_veto` params to allow applications to decide if they would like to burn deposits
 
 ### Improvements
 

proto/cosmos/gov/v1/gov.proto

@@ -243,4 +243,17 @@ message Params {
 
   //  Minimum expedited deposit for a proposal to enter voting period.
   repeated cosmos.base.v1beta1.Coin expedited_min_deposit = 12 [(gogoproto.nullable) = false, (amino.dont_omitempty) = true];
+
+  // burn deposits if a proposal does not meet quorum
+  //
+  // Since: cosmos-sdk 0.47
+  bool burn_vote_quorum = 13;
+  // burn deposits if the proposal does not enter voting period
+  //
+  // Since: cosmos-sdk 0.47
+  bool burn_proposal_deposit_prevote = 14;
+  // burn deposits if quorum with vote type no_veto is met
+  //
+  // Since: cosmos-sdk 0.47
+  bool burn_vote_veto = 15;
 }

tests/integration/gov/keeper/keeper_test.go

@@ -52,15 +52,15 @@ func initFixture(t *testing.T) *fixture {
 	queryHelper := baseapp.NewQueryServerTestHelper(ctx, app.InterfaceRegistry())
 	v1.RegisterQueryServer(queryHelper, app.GovKeeper)
 	legacyQueryHelper := baseapp.NewQueryServerTestHelper(ctx, app.InterfaceRegistry())
-	v1beta1.RegisterQueryServer(legacyQueryHelper, keeper.NewLegacyQueryServer(app.GovKeeper))
+	v1beta1.RegisterQueryServer(legacyQueryHelper, keeper.NewLegacyQueryServer(&app.GovKeeper))
 	queryClient := v1.NewQueryClient(queryHelper)
 	legacyQueryClient := v1beta1.NewQueryClient(legacyQueryHelper)
 
 	f.app = app
 	f.ctx = ctx
 	f.queryClient = queryClient
 	f.legacyQueryClient = legacyQueryClient
-	f.msgSrvr = keeper.NewMsgServerImpl(f.app.GovKeeper)
+	f.msgSrvr = keeper.NewMsgServerImpl(&f.app.GovKeeper)
 
 	govAcct := f.app.GovKeeper.GetGovernanceAccount(f.ctx).GetAddress()
 	f.legacyMsgSrvr = keeper.NewLegacyMsgServerImpl(govAcct.String(), f.msgSrvr)

x/gov/README.md

@@ -53,7 +53,6 @@ staking token of the chain.
     * [EndBlocker](#endblocker)
     * [Handlers](#handlers)
 * [Parameters](#parameters)
-    * [SubKeys](#subkeys)
 * [Client](#client)
     * [CLI](#cli)
     * [gRPC](#grpc)
@@ -260,6 +259,16 @@ new version of the software.
 
 Validators and full nodes can use an automation tool, such as [Cosmovisor](https://docs.cosmos.network/main/tooling/cosmovisor), for automatically switching version of the chain.
 
+#### Burnable Params
+
+There are three parameters that define if the deposit of a proposal should be burned or returned to the depositors. 
+
+* `BurnVoteVeto` burns the proposal deposit if the proposal gets vetoed. 
+* `BurnVoteQuorum` burns the proposal deposit if the proposal deposit if the vote does not reach quorum.
+* `BurnProposalDepositPrevote` burns the proposal deposit if it does not enter the voting phase. 
+
+> Note: These parameters are modifiable via governance. 
+
 ## State
 
 ### Constitution
@@ -274,12 +283,12 @@ Validators and full nodes can use an automation tool, such as [Cosmovisor](https
 Since this is more of a social feature than a technical feature, we'll now get into some items that may have been useful to have in a genesis constitution:
 
 * What limitations on governance exist, if any?
-  * is it okay for the community to slash the wallet of a whale that they no longer feel that they want around? (viz: Juno Proposal 4 and 16)
-  * can governance "socially slash" a validator who is using unapproved MEV? (viz: commonwealth.im/osmosis)
-  * In the event of an economic emergency, what should validators do?
-    * Terra crash of May, 2022, saw validators choose to run a new binary with code that had not been approved by governance, because the governance token had been inflated to nothing.
+    * is it okay for the community to slash the wallet of a whale that they no longer feel that they want around? (viz: Juno Proposal 4 and 16)
+    * can governance "socially slash" a validator who is using unapproved MEV? (viz: commonwealth.im/osmosis)
+    * In the event of an economic emergency, what should validators do?
+        * Terra crash of May, 2022, saw validators choose to run a new binary with code that had not been approved by governance, because the governance token had been inflated to nothing.
 * What is the purpose of the chain, specifically?
-  * best example of this is the Cosmos hub, where different founding groups, have different interpertations of the purpose of the network.
+    * best example of this is the Cosmos hub, where different founding groups, have different interpertations of the purpose of the network.
 
 This genesis entry, "constitution" hasn't been designed for existing chains, who should likely just ratify a constitution using their governance system.  Instead, this is for new chains.  It will allow for validators to have a much clearer idea of purpose and the expecations placed on them while operating thier nodes.  Likewise, for community members, the constitution will give them some idea of what to expect from both the "chain team" and the validators, respectively.
 
@@ -716,7 +725,7 @@ The governance module emits the following events:
 ### EndBlocker
 
 | Type              | Attribute Key   | Attribute Value  |
-| ----------------- | --------------- | ---------------- |
+|-------------------|-----------------|------------------|
 | inactive_proposal | proposal_id     | {proposalID}     |
 | inactive_proposal | proposal_result | {proposalResult} |
 | active_proposal   | proposal_id     | {proposalID}     |
@@ -727,7 +736,7 @@ The governance module emits the following events:
 #### MsgSubmitProposal
 
 | Type                | Attribute Key       | Attribute Value |
-| ------------------- | ------------------- | --------------- |
+|---------------------|---------------------|-----------------|
 | submit_proposal     | proposal_id         | {proposalID}    |
 | submit_proposal [0] | voting_period_start | {proposalID}    |
 | proposal_deposit    | amount              | {depositAmount} |
@@ -741,7 +750,7 @@ The governance module emits the following events:
 #### MsgVote
 
 | Type          | Attribute Key | Attribute Value |
-| ------------- | ------------- | --------------- |
+|---------------|---------------|-----------------|
 | proposal_vote | option        | {voteOption}    |
 | proposal_vote | proposal_id   | {proposalID}    |
 | message       | module        | governance      |
@@ -751,7 +760,7 @@ The governance module emits the following events:
 #### MsgVoteWeighted
 
 | Type          | Attribute Key | Attribute Value       |
-| ------------- | ------------- | --------------------- |
+|---------------|---------------|-----------------------|
 | proposal_vote | option        | {weightedVoteOptions} |
 | proposal_vote | proposal_id   | {proposalID}          |
 | message       | module        | governance            |
@@ -761,7 +770,7 @@ The governance module emits the following events:
 #### MsgDeposit
 
 | Type                 | Attribute Key       | Attribute Value |
-| -------------------- | ------------------- | --------------- |
+|----------------------|---------------------|-----------------|
 | proposal_deposit     | amount              | {depositAmount} |
 | proposal_deposit     | proposal_id         | {proposalID}    |
 | proposal_deposit [0] | voting_period_start | {proposalID}    |
@@ -775,17 +784,20 @@ The governance module emits the following events:
 
 The governance module contains the following parameters:
 
-| Key                     | Type             | Example                                 |
-| ----------------------- | ---------------- | --------------------------------------- |
-| min_deposit             | array (coins)    | [{"denom":"uatom","amount":"10000000"}] |
-| max_deposit_period      | string (time ns) | "172800000000000" (17280s)              |
-| voting_period           | string (time ns) | "172800000000000" (17280s)              |
-| quorum                  | string (dec)     | "0.334000000000000000"                  |
-| threshold               | string (dec)     | "0.500000000000000000"                  |
-| veto                    | string (dec)     | "0.334000000000000000"                  |
-| expedited_threshold     | string (time ns) | "0.667000000000000000"                  |
-| expedited_voting_period | string (time ns) | "86400000000000" (8600s)                |
-| expedited_min_deposit   | array (coins)    | [{"denom":"uatom","amount":"50000000"}] |
+| Key                           | Type             | Example                                 |
+|-------------------------------|------------------|-----------------------------------------|
+| min_deposit                   | array (coins)    | [{"denom":"uatom","amount":"10000000"}] |
+| max_deposit_period            | string (time ns) | "172800000000000" (17280s)              |
+| voting_period                 | string (time ns) | "172800000000000" (17280s)              |
+| quorum                        | string (dec)     | "0.334000000000000000"                  |
+| threshold                     | string (dec)     | "0.500000000000000000"                  |
+| veto                          | string (dec)     | "0.334000000000000000"                  |
+| expedited_threshold           | string (time ns) | "0.667000000000000000"                  |
+| expedited_voting_period       | string (time ns) | "86400000000000" (8600s)                |
+| expedited_min_deposit         | array (coins)    | [{"denom":"uatom","amount":"50000000"}] |
+| burn_proposal_deposit_prevote | bool             | false                                    |
+| burn_vote_quorum              | bool             | false                                   |
+| burn_vote_veto                | bool             | true                                    |
 
 **NOTE**: The governance module contains parameters that are objects unlike other
 modules. If only a subset of parameters are desired to be changed, only they need

x/gov/abci.go

@@ -20,7 +20,12 @@ func EndBlocker(ctx sdk.Context, keeper *keeper.Keeper) {
 	// A proposal is dead when it's inactive and didn't get enough deposit on time to get into voting phase.
 	keeper.IterateInactiveProposalsQueue(ctx, ctx.BlockHeader().Time, func(proposal v1.Proposal) bool {
 		keeper.DeleteProposal(ctx, proposal.Id)
-		keeper.RefundAndDeleteDeposits(ctx, proposal.Id) // refund deposit if proposal got removed without getting 100% of the proposal
+
+		if !keeper.GetParams(ctx).BurnProposalDepositPrevote {
+			keeper.RefundAndDeleteDeposits(ctx, proposal.Id) // refund deposit if proposal got removed without getting 100% of the proposal
+		} else {
+			keeper.DeleteAndBurnDeposits(ctx, proposal.Id) // burn the deposit if proposal got removed without getting 100% of the proposal
+		}
 
 		// called when proposal become inactive
 		keeper.Hooks().AfterProposalFailedMinDeposit(ctx, proposal.Id)
@@ -53,7 +58,7 @@ func EndBlocker(ctx sdk.Context, keeper *keeper.Keeper) {
 
 		// If an expedited proposal fails, we do not want to update
 		// the deposit at this point since the proposal is converted to regular.
-		// As a result, the deposits are either deleted or refunded in all casses
+		// As a result, the deposits are either deleted or refunded in all cases
 		// EXCEPT when an expedited proposal fails.
 		if !(proposal.Expedited && !passes) {
 			if burnDeposits {

x/gov/keeper/tally.go

@@ -102,7 +102,7 @@ func (keeper Keeper) Tally(ctx sdk.Context, proposal v1.Proposal) (passes bool,
 	percentVoting := totalVotingPower.Quo(sdk.NewDecFromInt(keeper.sk.TotalBondedTokens(ctx)))
 	quorum, _ := sdk.NewDecFromStr(params.Quorum)
 	if percentVoting.LT(quorum) {
-		return false, false, tallyResults
+		return false, keeper.GetParams(ctx).BurnVoteQuorum, tallyResults
 	}
 
 	// If no one votes (everyone abstains), proposal fails
@@ -113,7 +113,7 @@ func (keeper Keeper) Tally(ctx sdk.Context, proposal v1.Proposal) (passes bool,
 	// If more than 1/3 of voters veto, proposal fails
 	vetoThreshold, _ := sdk.NewDecFromStr(params.VetoThreshold)
 	if results[v1.OptionNoWithVeto].Quo(totalVotingPower).GT(vetoThreshold) {
-		return false, true, tallyResults
+		return false, keeper.GetParams(ctx).BurnVoteVeto, tallyResults
 	}
 
 	// If more than 1/2 of non-abstaining voters vote Yes, proposal passes

x/gov/migrations/v4/json.go

@@ -26,6 +26,9 @@ func MigrateJSON(oldState *v1.GenesisState) (*v1.GenesisState, error) {
 		defaultParams.MinInitialDepositRatio,
 		defaultParams.ProposalCancelRatio,
 		defaultParams.ProposalCancelDest,
+		defaultParams.BurnProposalDepositPrevote,
+		defaultParams.BurnVoteQuorum,
+		defaultParams.BurnVoteVeto,
 	)
 
 	return &v1.GenesisState{

x/gov/migrations/v4/json_test.go

@@ -60,6 +60,9 @@ func TestMigrateJSON(t *testing.T) {
 	"deposit_params": null,
 	"deposits": [],
 	"params": {
+		"burn_proposal_deposit_prevote": false,
+		"burn_vote_quorum": false,
+		"burn_vote_veto": true,
 		"expedited_min_deposit": [
 			{
 				"amount": "50000000",

x/gov/migrations/v4/store.go

@@ -25,19 +25,23 @@ func migrateParams(ctx sdk.Context, storeKey storetypes.StoreKey, legacySubspace
 	legacySubspace.Get(ctx, govv1.ParamStoreKeyVotingParams, &vp)
 	legacySubspace.Get(ctx, govv1.ParamStoreKeyTallyParams, &tp)
 
+	defaultParams := govv1.DefaultParams()
 	params := govv1.NewParams(
 		dp.MinDeposit,
-		govv1.DefaultParams().ExpeditedMinDeposit,
+		defaultParams.ExpeditedMinDeposit,
 		*dp.MaxDepositPeriod,
 		*vp.VotingPeriod,
-		*govv1.DefaultParams().ExpeditedVotingPeriod,
+		*defaultParams.ExpeditedVotingPeriod,
 		tp.Quorum,
 		tp.Threshold,
-		govv1.DefaultParams().ExpeditedThreshold,
+		defaultParams.ExpeditedThreshold,
 		tp.VetoThreshold,
 		sdk.ZeroDec().String(),
 		sdk.ZeroDec().String(),
 		"",
+		defaultParams.BurnProposalDepositPrevote,
+		defaultParams.BurnVoteQuorum,
+		defaultParams.BurnVoteVeto,
 	)
 
 	bz, err := cdc.Marshal(&params)

x/gov/migrations/v5/store.go

@@ -24,6 +24,9 @@ func MigrateStore(ctx sdk.Context, storeKey storetypes.StoreKey, cdc codec.Binar
 	params.ExpeditedMinDeposit = defaultParams.ExpeditedMinDeposit
 	params.ExpeditedVotingPeriod = defaultParams.ExpeditedVotingPeriod
 	params.ExpeditedThreshold = defaultParams.ExpeditedThreshold
+	params.BurnProposalDepositPrevote = defaultParams.BurnProposalDepositPrevote
+	params.BurnVoteQuorum = defaultParams.BurnVoteQuorum
+	params.BurnVoteVeto = defaultParams.BurnVoteVeto
 
 	bz, err := cdc.Marshal(&params)
 	if err != nil {

x/gov/simulation/genesis.go

@@ -166,7 +166,7 @@ func RandomizedGenState(simState *module.SimulationState) {
 
 	govGenesis := v1.NewGenesisState(
 		startingProposalID,
-		v1.NewParams(minDeposit, expeditedMinDeposit, depositPeriod, votingPeriod, expeditedVotingPeriod, quorum.String(), threshold.String(), expitedVotingThreshold.String(), veto.String(), minInitialDepositRatio.String(), proposalCancelRate.String(), ""),
+		v1.NewParams(minDeposit, expeditedMinDeposit, depositPeriod, votingPeriod, expeditedVotingPeriod, quorum.String(), threshold.String(), expitedVotingThreshold.String(), veto.String(), minInitialDepositRatio.String(), proposalCancelRate.String(), "", simState.Rand.Intn(2) == 0, simState.Rand.Intn(2) == 0, simState.Rand.Intn(2) == 0),
 	)
 
 	bz, err := json.MarshalIndent(&govGenesis, "", " ")