feat: Add metadata field to proposal (cosmos#10989)

## Description

Closes: cosmos#10490 




---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

CHANGELOG.md

@@ -115,7 +115,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * [\#10748](https://github.com/cosmos/cosmos-sdk/pull/10748) Move legacy `x/gov` api to `v1beta1` directory.
 * [\#10816](https://github.com/cosmos/cosmos-sdk/pull/10816) Reuse blocked addresses from the bank module. No need to pass them to distribution. 
 * [\#10852](https://github.com/cosmos/cosmos-sdk/pull/10852) Move `x/gov/types` to `x/gov/types/v1beta2`.
-* [\#10868](https://github.com/cosmos/cosmos-sdk/pull/10868) The Gov keeper accepts now a mandatory last argument, the ServiceMsgRouter.
+* [\#10868](https://github.com/cosmos/cosmos-sdk/pull/10868), [\#10989](https://github.com/cosmos/cosmos-sdk/pull/10989) The Gov keeper accepts now 2 more mandatory arguments, the ServiceMsgRouter and a maximum proposal metadata length.
 
 ### Client Breaking Changes
 

proto/cosmos/gov/v1beta2/gov.proto

@@ -49,6 +49,9 @@ message Proposal {
   repeated cosmos.base.v1beta1.Coin total_deposit     = 7 [(gogoproto.nullable) = false];
   google.protobuf.Timestamp         voting_start_time = 8 [(gogoproto.stdtime) = true];
   google.protobuf.Timestamp         voting_end_time   = 9 [(gogoproto.stdtime) = true];
+
+  // metadata is any arbitrary metadata attached to the proposal.
+  bytes metadata = 10;
 }
 
 // ProposalStatus enumerates the valid statuses of a proposal.

proto/cosmos/gov/v1beta2/tx.proto

@@ -36,6 +36,8 @@ message MsgSubmitProposal {
   repeated google.protobuf.Any messages             = 1;
   repeated cosmos.base.v1beta1.Coin initial_deposit = 2 [(gogoproto.nullable) = false];
   string                            proposer        = 3 [(cosmos_proto.scalar) = "cosmos.AddressString"];
+  // metadata is any arbitrary metadata attached to the proposal.
+  bytes metadata = 4;
 }
 
 // MsgSubmitProposalResponse defines the Msg/SubmitProposal response type.

simapp/app.go

@@ -302,9 +302,10 @@ func NewSimApp(
 		AddRoute(paramproposal.RouterKey, params.NewParamChangeProposalHandler(app.ParamsKeeper)).
 		AddRoute(distrtypes.RouterKey, distr.NewCommunityPoolSpendProposalHandler(app.DistrKeeper)).
 		AddRoute(upgradetypes.RouterKey, upgrade.NewSoftwareUpgradeProposalHandler(app.UpgradeKeeper))
+	govMaxMetadataLen := uint64(10000)
 	govKeeper := govkeeper.NewKeeper(
 		appCodec, keys[govtypes.StoreKey], app.GetSubspace(govtypes.ModuleName), app.AccountKeeper, app.BankKeeper,
-		&stakingKeeper, govRouter, app.msgSvcRouter,
+		&stakingKeeper, govRouter, app.msgSvcRouter, govMaxMetadataLen,
 	)
 
 	app.GovKeeper = *govKeeper.SetHooks(

x/auth/middleware/tips_test.go

@@ -33,7 +33,7 @@ func (s *MWTestSuite) setupAcctsForTips(ctx sdk.Context) (sdk.Context, []testAcc
 	s.Require().NoError(err)
 
 	// Create dummy proposal for tipper to vote on.
-	prop, err := govtypes.NewProposal([]sdk.Msg{banktypes.NewMsgSend(accts[0].acc.GetAddress(), accts[0].acc.GetAddress(), initialRegens)}, 1, time.Now(), time.Now().Add(time.Hour))
+	prop, err := govtypes.NewProposal([]sdk.Msg{banktypes.NewMsgSend(accts[0].acc.GetAddress(), accts[0].acc.GetAddress(), initialRegens)}, 1, nil, time.Now(), time.Now().Add(time.Hour))
 	s.Require().NoError(err)
 	s.app.GovKeeper.SetProposal(ctx, prop)
 	s.app.GovKeeper.ActivateVotingPeriod(ctx, prop)

x/gov/abci_test.go

@@ -37,6 +37,7 @@ func TestTickExpiredDepositPeriod(t *testing.T) {
 		[]sdk.Msg{mkTestLegacyContent(t)},
 		sdk.Coins{sdk.NewInt64Coin(sdk.DefaultBondDenom, 5)},
 		addrs[0].String(),
+		nil,
 	)
 	require.NoError(t, err)
 
@@ -89,6 +90,7 @@ func TestTickMultipleExpiredDepositPeriod(t *testing.T) {
 		[]sdk.Msg{mkTestLegacyContent(t)},
 		sdk.Coins{sdk.NewInt64Coin(sdk.DefaultBondDenom, 5)},
 		addrs[0].String(),
+		nil,
 	)
 	require.NoError(t, err)
 
@@ -112,6 +114,7 @@ func TestTickMultipleExpiredDepositPeriod(t *testing.T) {
 		[]sdk.Msg{mkTestLegacyContent(t)},
 		sdk.Coins{sdk.NewInt64Coin(sdk.DefaultBondDenom, 5)},
 		addrs[0].String(),
+		nil,
 	)
 	require.NoError(t, err)
 
@@ -169,6 +172,7 @@ func TestTickPassedDepositPeriod(t *testing.T) {
 		[]sdk.Msg{mkTestLegacyContent(t)},
 		sdk.Coins{sdk.NewInt64Coin(sdk.DefaultBondDenom, 5)},
 		addrs[0].String(),
+		nil,
 	)
 	require.NoError(t, err)
 
@@ -221,7 +225,7 @@ func TestTickPassedVotingPeriod(t *testing.T) {
 	activeQueue.Close()
 
 	proposalCoins := sdk.Coins{sdk.NewCoin(sdk.DefaultBondDenom, app.StakingKeeper.TokensFromConsensusPower(ctx, 5))}
-	newProposalMsg, err := v1beta2.NewMsgSubmitProposal([]sdk.Msg{mkTestLegacyContent(t)}, proposalCoins, addrs[0].String())
+	newProposalMsg, err := v1beta2.NewMsgSubmitProposal([]sdk.Msg{mkTestLegacyContent(t)}, proposalCoins, addrs[0].String(), nil)
 	require.NoError(t, err)
 
 	wrapCtx := sdk.WrapSDKContext(ctx)
@@ -289,7 +293,7 @@ func TestProposalPassedEndblocker(t *testing.T) {
 	require.NotNil(t, macc)
 	initialModuleAccCoins := app.BankKeeper.GetAllBalances(ctx, macc.GetAddress())
 
-	proposal, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{mkTestLegacyContent(t)})
+	proposal, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{mkTestLegacyContent(t)}, nil)
 	require.NoError(t, err)
 
 	proposalCoins := sdk.Coins{sdk.NewCoin(sdk.DefaultBondDenom, app.StakingKeeper.TokensFromConsensusPower(ctx, 10))}
@@ -339,7 +343,7 @@ func TestEndBlockerProposalHandlerFailed(t *testing.T) {
 	// Create a proposal where the handler will pass for the test proposal
 	// because the value of contextKeyBadProposal is true.
 	ctx = ctx.WithValue(contextKeyBadProposal, true)
-	proposal, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{mkTestLegacyContent(t)})
+	proposal, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{mkTestLegacyContent(t)}, nil)
 	require.NoError(t, err)
 
 	proposalCoins := sdk.NewCoins(sdk.NewCoin(sdk.DefaultBondDenom, app.StakingKeeper.TokensFromConsensusPower(ctx, 10)))

x/gov/client/utils/query.go

@@ -56,7 +56,7 @@ func QueryDepositsByTxQuery(clientCtx client.Context, params v1beta2.QueryPropos
 		clientCtx, defaultPage,
 		// Query legacy Msgs event action
 		[]string{
-			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta2.TypeMsgDeposit),
+			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta1.TypeMsgDeposit),
 			fmt.Sprintf("%s.%s='%d'", types.EventTypeProposalDeposit, types.AttributeKeyProposalID, params.ProposalID),
 		},
 		// Query proto Msgs event action v1beta1
@@ -119,7 +119,7 @@ func QueryVotesByTxQuery(clientCtx client.Context, params v1beta2.QueryProposalV
 			clientCtx, nextTxPage,
 			// Query legacy Vote Msgs
 			[]string{
-				fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta2.TypeMsgVote),
+				fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta1.TypeMsgVote),
 				fmt.Sprintf("%s.%s='%d'", types.EventTypeProposalVote, types.AttributeKeyProposalID, params.ProposalID),
 			},
 			// Query Vote proto Msgs v1beta1
@@ -134,7 +134,7 @@ func QueryVotesByTxQuery(clientCtx client.Context, params v1beta2.QueryProposalV
 			},
 			// Query legacy VoteWeighted Msgs
 			[]string{
-				fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta2.TypeMsgVoteWeighted),
+				fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta1.TypeMsgVoteWeighted),
 				fmt.Sprintf("%s.%s='%d'", types.EventTypeProposalVote, types.AttributeKeyProposalID, params.ProposalID),
 			},
 			// Query VoteWeighted proto Msgs v1beta1
@@ -210,7 +210,7 @@ func QueryVoteByTxQuery(clientCtx client.Context, params v1beta2.QueryVoteParams
 		clientCtx, defaultPage,
 		// Query legacy Vote Msgs
 		[]string{
-			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta2.TypeMsgVote),
+			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta1.TypeMsgVote),
 			fmt.Sprintf("%s.%s='%d'", types.EventTypeProposalVote, types.AttributeKeyProposalID, params.ProposalID),
 			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeySender, params.Voter),
 		},
@@ -228,7 +228,7 @@ func QueryVoteByTxQuery(clientCtx client.Context, params v1beta2.QueryVoteParams
 		},
 		// Query legacy VoteWeighted Msgs
 		[]string{
-			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta2.TypeMsgVoteWeighted),
+			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta1.TypeMsgVoteWeighted),
 			fmt.Sprintf("%s.%s='%d'", types.EventTypeProposalVote, types.AttributeKeyProposalID, params.ProposalID),
 			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeySender, params.Voter.String()),
 		},
@@ -318,7 +318,7 @@ func QueryDepositByTxQuery(clientCtx client.Context, params v1beta2.QueryDeposit
 		clientCtx, defaultPage,
 		// Query legacy Msgs event action
 		[]string{
-			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta2.TypeMsgDeposit),
+			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta1.TypeMsgDeposit),
 			fmt.Sprintf("%s.%s='%d'", types.EventTypeProposalDeposit, types.AttributeKeyProposalID, params.ProposalID),
 			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeySender, params.Depositor.String()),
 		},
@@ -385,7 +385,7 @@ func QueryProposerByTxQuery(clientCtx client.Context, proposalID uint64) (Propos
 		defaultPage,
 		// Query legacy Msgs event action
 		[]string{
-			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta2.TypeMsgSubmitProposal),
+			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta1.TypeMsgSubmitProposal),
 			fmt.Sprintf("%s.%s='%d'", types.EventTypeSubmitProposal, types.AttributeKeyProposalID, proposalID),
 		},
 		// Query proto Msgs event action v1beta1
@@ -463,7 +463,7 @@ func queryInitialDepositByTxQuery(clientCtx client.Context, proposalID uint64) (
 		clientCtx, defaultPage,
 		// Query legacy Msgs event action
 		[]string{
-			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta2.TypeMsgSubmitProposal),
+			fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, v1beta1.TypeMsgSubmitProposal),
 			fmt.Sprintf("%s.%s='%d'", types.EventTypeSubmitProposal, types.AttributeKeyProposalID, proposalID),
 		},
 		// Query proto Msgs event action v1beta1

x/gov/genesis_test.go

@@ -35,11 +35,11 @@ func TestImportExportQueues(t *testing.T) {
 
 	ctx = app.BaseApp.NewContext(false, tmproto.Header{})
 	// Create two proposals, put the second into the voting period
-	proposal1, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{mkTestLegacyContent(t)})
+	proposal1, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{mkTestLegacyContent(t)}, nil)
 	require.NoError(t, err)
 	proposalID1 := proposal1.ProposalId
 
-	proposal2, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{mkTestLegacyContent(t)})
+	proposal2, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{mkTestLegacyContent(t)}, nil)
 	require.NoError(t, err)
 	proposalID2 := proposal2.ProposalId
 

x/gov/keeper/deposit_test.go

@@ -17,7 +17,7 @@ func TestDeposits(t *testing.T) {
 	TestAddrs := simapp.AddTestAddrsIncremental(app, ctx, 2, sdk.NewInt(10000000))
 
 	tp := TestProposal
-	proposal, err := app.GovKeeper.SubmitProposal(ctx, tp)
+	proposal, err := app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
 	proposalID := proposal.ProposalId
 
@@ -101,7 +101,7 @@ func TestDeposits(t *testing.T) {
 	require.Equal(t, addr1Initial, app.BankKeeper.GetAllBalances(ctx, TestAddrs[1]))
 
 	// Test delete and burn deposits
-	proposal, err = app.GovKeeper.SubmitProposal(ctx, tp)
+	proposal, err = app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
 	proposalID = proposal.ProposalId
 	_, err = app.GovKeeper.AddDeposit(ctx, proposalID, TestAddrs[0], fourStake)

x/gov/keeper/grpc_query_test.go

@@ -52,7 +52,7 @@ func (suite *KeeperTestSuite) TestGRPCQueryProposal() {
 				testProposal := v1beta1.NewTextProposal("Proposal", "testing proposal")
 				msgContent, err := v1beta2.NewLegacyContent(testProposal, govAcct.String())
 				suite.Require().NoError(err)
-				submittedProposal, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{msgContent})
+				submittedProposal, err := app.GovKeeper.SubmitProposal(ctx, []sdk.Msg{msgContent}, nil)
 				suite.Require().NoError(err)
 				suite.Require().NotEmpty(submittedProposal)
 
@@ -116,7 +116,7 @@ func (suite *KeeperTestSuite) TestGRPCQueryProposals() {
 					testProposal := []sdk.Msg{
 						v1beta2.NewMsgVote(govAddress, uint64(i), v1beta2.OptionYes),
 					}
-					proposal, err := app.GovKeeper.SubmitProposal(ctx, testProposal)
+					proposal, err := app.GovKeeper.SubmitProposal(ctx, testProposal, nil)
 					suite.Require().NotEmpty(proposal)
 					suite.Require().NoError(err)
 					testProposals = append(testProposals, &proposal)
@@ -291,7 +291,7 @@ func (suite *KeeperTestSuite) TestGRPCQueryVote() {
 			"no votes present",
 			func() {
 				var err error
-				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal)
+				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal, nil)
 				suite.Require().NoError(err)
 
 				req = &v1beta2.QueryVoteRequest{
@@ -396,7 +396,7 @@ func (suite *KeeperTestSuite) TestGRPCQueryVotes() {
 			"create a proposal and get votes",
 			func() {
 				var err error
-				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal)
+				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal, nil)
 				suite.Require().NoError(err)
 
 				req = &v1beta2.QueryVotesRequest{
@@ -588,7 +588,7 @@ func (suite *KeeperTestSuite) TestGRPCQueryDeposit() {
 			"no deposits proposal",
 			func() {
 				var err error
-				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal)
+				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal, nil)
 				suite.Require().NoError(err)
 				suite.Require().NotNil(proposal)
 
@@ -677,7 +677,7 @@ func (suite *KeeperTestSuite) TestGRPCQueryDeposits() {
 			"create a proposal and get deposits",
 			func() {
 				var err error
-				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal)
+				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal, nil)
 				suite.Require().NoError(err)
 
 				req = &v1beta2.QueryDepositsRequest{
@@ -769,7 +769,7 @@ func (suite *KeeperTestSuite) TestGRPCQueryTally() {
 			"create a proposal and get tally",
 			func() {
 				var err error
-				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal)
+				proposal, err = app.GovKeeper.SubmitProposal(ctx, TestProposal, nil)
 				suite.Require().NoError(err)
 				suite.Require().NotNil(proposal)
 

x/gov/keeper/hooks_test.go

@@ -64,7 +64,7 @@ func TestHooks(t *testing.T) {
 	require.False(t, govHooksReceiver.AfterProposalVotingPeriodEndedValid)
 
 	tp := TestProposal
-	_, err := app.GovKeeper.SubmitProposal(ctx, tp)
+	_, err := app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
 	require.True(t, govHooksReceiver.AfterProposalSubmissionValid)
 
@@ -75,7 +75,7 @@ func TestHooks(t *testing.T) {
 
 	require.True(t, govHooksReceiver.AfterProposalFailedMinDepositValid)
 
-	p2, err := app.GovKeeper.SubmitProposal(ctx, tp)
+	p2, err := app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
 
 	activated, err := app.GovKeeper.AddDeposit(ctx, p2.ProposalId, addrs[0], minDeposit)

x/gov/keeper/keeper.go

@@ -41,6 +41,9 @@ type Keeper struct {
 
 	// Msg server router
 	router *middleware.MsgServiceRouter
+
+	// maxMetadataLen defines the maximum proposal metadata length.
+	maxMetadataLen uint64
 }
 
 // NewKeeper returns a governance keeper. It handles:
@@ -54,6 +57,7 @@ func NewKeeper(
 	cdc codec.BinaryCodec, key storetypes.StoreKey, paramSpace types.ParamSubspace,
 	authKeeper types.AccountKeeper, bankKeeper types.BankKeeper, sk types.StakingKeeper,
 	legacyRouter v1beta1.Router, router *middleware.MsgServiceRouter,
+	maxMetadataLen uint64,
 ) Keeper {
 
 	// ensure governance module account is set
@@ -67,14 +71,15 @@ func NewKeeper(
 	legacyRouter.Seal()
 
 	return Keeper{
-		storeKey:     key,
-		paramSpace:   paramSpace,
-		authKeeper:   authKeeper,
-		bankKeeper:   bankKeeper,
-		sk:           sk,
-		cdc:          cdc,
-		legacyRouter: legacyRouter,
-		router:       router,
+		storeKey:       key,
+		paramSpace:     paramSpace,
+		authKeeper:     authKeeper,
+		bankKeeper:     bankKeeper,
+		sk:             sk,
+		cdc:            cdc,
+		legacyRouter:   legacyRouter,
+		router:         router,
+		maxMetadataLen: maxMetadataLen,
 	}
 }
 

x/gov/keeper/keeper_test.go

@@ -51,17 +51,17 @@ func TestIncrementProposalNumber(t *testing.T) {
 	ctx := app.BaseApp.NewContext(false, tmproto.Header{})
 
 	tp := TestProposal
-	_, err := app.GovKeeper.SubmitProposal(ctx, tp)
+	_, err := app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
-	_, err = app.GovKeeper.SubmitProposal(ctx, tp)
+	_, err = app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
-	_, err = app.GovKeeper.SubmitProposal(ctx, tp)
+	_, err = app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
-	_, err = app.GovKeeper.SubmitProposal(ctx, tp)
+	_, err = app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
-	_, err = app.GovKeeper.SubmitProposal(ctx, tp)
+	_, err = app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
-	proposal6, err := app.GovKeeper.SubmitProposal(ctx, tp)
+	proposal6, err := app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
 
 	require.Equal(t, uint64(6), proposal6.ProposalId)
@@ -73,7 +73,7 @@ func TestProposalQueues(t *testing.T) {
 
 	// create test proposals
 	tp := TestProposal
-	proposal, err := app.GovKeeper.SubmitProposal(ctx, tp)
+	proposal, err := app.GovKeeper.SubmitProposal(ctx, tp, nil)
 	require.NoError(t, err)
 
 	inactiveIterator := app.GovKeeper.InactiveProposalQueueIterator(ctx, *proposal.DepositEndTime)

x/gov/keeper/msg_server.go

@@ -36,7 +36,7 @@ func (k msgServer) SubmitProposal(goCtx context.Context, msg *v1beta2.MsgSubmitP
 		return nil, err
 	}
 
-	proposal, err := k.Keeper.SubmitProposal(ctx, proposalMsgs)
+	proposal, err := k.Keeper.SubmitProposal(ctx, proposalMsgs, msg.Metadata)
 	if err != nil {
 		return nil, err
 	}
@@ -230,6 +230,7 @@ func (k legacyMsgServer) SubmitProposal(goCtx context.Context, msg *v1beta1.MsgS
 		[]sdk.Msg{contentMsg},
 		msg.InitialDeposit,
 		msg.Proposer,
+		nil,
 	)
 	if err != nil {
 		return nil, err