diff --git a/app/app.go b/app/app.go
index 5d628acf..ba62c3c2 100644
--- a/app/app.go
+++ b/app/app.go
@@ -4,7 +4,6 @@ import (
 	"io"
 	"os"
 
-
 	abci "github.com/tendermint/tendermint/abci/types"
 	"github.com/tendermint/tendermint/libs/log"
 	tmos "github.com/tendermint/tendermint/libs/os"
@@ -39,7 +38,6 @@ import (
 	"github.com/kava-labs/kava/x/kavadist"
 	"github.com/kava-labs/kava/x/pricefeed"
 	validatorvesting "github.com/kava-labs/kava/x/validator-vesting"
-	
 )
 
 const (
@@ -261,8 +259,7 @@ func NewApp(logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest bool,
 	app.committeeKeeper = committee.NewKeeper(
 		app.cdc,
 		keys[committee.StoreKey],
-		committeeGovRouter,
-		committee.DefaultCodespace, // TODO blacklist module addresses?)
+		committeeGovRouter, // TODO blacklist module addresses?
 	)
 
 	// create gov keeper with router
@@ -356,7 +353,7 @@ func NewApp(logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest bool,
 		bep3.NewAppModule(app.bep3Keeper, app.accountKeeper, app.supplyKeeper),
 		kavadist.NewAppModule(app.kavadistKeeper, app.supplyKeeper),
 		incentive.NewAppModule(app.incentiveKeeper, app.accountKeeper, app.supplyKeeper),
-		committee.NewAppModule(app.committeeKeeper),
+		committee.NewAppModule(app.committeeKeeper, app.accountKeeper),
 	)
 
 	// During begin block slashing happens after distr.BeginBlocker so that
@@ -364,7 +361,7 @@ func NewApp(logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest bool,
 	// CanWithdrawInvariant invariant.
 	// Auction.BeginBlocker will close out expired auctions and pay debt back to cdp.
 	// So it should be run before cdp.BeginBlocker which cancels out debt with stable and starts more auctions.
-	app.mm.SetOrderBeginBlockers(mint.ModuleName, distr.ModuleName, slashing.ModuleName, validatorvesting.ModuleName, kavadist.ModuleName, auction.ModuleName, cdp.ModuleName, bep3.ModuleName, incentive.ModuleName committee.ModuleName)
+	app.mm.SetOrderBeginBlockers(mint.ModuleName, distr.ModuleName, slashing.ModuleName, validatorvesting.ModuleName, kavadist.ModuleName, auction.ModuleName, cdp.ModuleName, bep3.ModuleName, incentive.ModuleName, committee.ModuleName)
 
 	app.mm.SetOrderEndBlockers(crisis.ModuleName, gov.ModuleName, staking.ModuleName, pricefeed.ModuleName)
 
@@ -374,7 +371,7 @@ func NewApp(logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest bool,
 		staking.ModuleName, bank.ModuleName, slashing.ModuleName,
 		gov.ModuleName, mint.ModuleName, evidence.ModuleName,
 		pricefeed.ModuleName, cdp.ModuleName, auction.ModuleName,
-		bep3.ModuleName, kavadist.ModuleName, incentive.ModuleName, committee.ModuleName
+		bep3.ModuleName, kavadist.ModuleName, incentive.ModuleName, committee.ModuleName,
 		supply.ModuleName,  // calculates the total supply from account - should run after modules that modify accounts in genesis
 		crisis.ModuleName,  // runs the invariants at genesis - should run after other modules
 		genutil.ModuleName, // genutils must occur after staking so that pools are properly initialized with tokens from genesis accounts.
diff --git a/x/committee/alias.go b/x/committee/alias.go
index 996dddfc..17138e4b 100644
--- a/x/committee/alias.go
+++ b/x/committee/alias.go
@@ -16,12 +16,6 @@ const (
 	AttributeValueProposalFailed    = types.AttributeValueProposalFailed
 	AttributeValueProposalPassed    = types.AttributeValueProposalPassed
 	AttributeValueProposalTimeout   = types.AttributeValueProposalTimeout
-	CodeInvalidCommittee            = types.CodeInvalidCommittee
-	CodeInvalidGenesis              = types.CodeInvalidGenesis
-	CodeInvalidProposal             = types.CodeInvalidProposal
-	CodeProposalExpired             = types.CodeProposalExpired
-	CodeUnknownItem                 = types.CodeUnknownItem
-	DefaultCodespace                = types.DefaultCodespace
 	DefaultNextProposalID           = types.DefaultNextProposalID
 	DefaultParamspace               = types.DefaultParamspace
 	EventTypeProposalClose          = types.EventTypeProposalClose
@@ -50,14 +44,6 @@ var (
 	NewKeeper                  = keeper.NewKeeper
 	NewQuerier                 = keeper.NewQuerier
 	DefaultGenesisState        = types.DefaultGenesisState
-	ErrInvalidCommittee        = types.ErrInvalidCommittee
-	ErrInvalidGenesis          = types.ErrInvalidGenesis
-	ErrInvalidPubProposal      = types.ErrInvalidPubProposal
-	ErrNoProposalHandlerExists = types.ErrNoProposalHandlerExists
-	ErrProposalExpired         = types.ErrProposalExpired
-	ErrUnknownCommittee        = types.ErrUnknownCommittee
-	ErrUnknownProposal         = types.ErrUnknownProposal
-	ErrUnknownVote             = types.ErrUnknownVote
 	GetKeyFromID               = types.GetKeyFromID
 	GetVoteKey                 = types.GetVoteKey
 	NewCommittee               = types.NewCommittee
@@ -66,6 +52,7 @@ var (
 	NewGenesisState            = types.NewGenesisState
 	NewMsgSubmitProposal       = types.NewMsgSubmitProposal
 	NewMsgVote                 = types.NewMsgVote
+	NewProposal                = types.NewProposal
 	NewQueryCommitteeParams    = types.NewQueryCommitteeParams
 	NewQueryProposalParams     = types.NewQueryProposalParams
 	NewQueryVoteParams         = types.NewQueryVoteParams
@@ -75,12 +62,20 @@ var (
 	Uint64FromBytes            = types.Uint64FromBytes
 
 	// variable aliases
-	ProposalHandler    = client.ProposalHandler
-	CommitteeKeyPrefix = types.CommitteeKeyPrefix
-	ModuleCdc          = types.ModuleCdc
-	NextProposalIDKey  = types.NextProposalIDKey
-	ProposalKeyPrefix  = types.ProposalKeyPrefix
-	VoteKeyPrefix      = types.VoteKeyPrefix
+	ProposalHandler            = client.ProposalHandler
+	CommitteeKeyPrefix         = types.CommitteeKeyPrefix
+	ErrInvalidCommittee        = types.ErrInvalidCommittee
+	ErrInvalidGenesis          = types.ErrInvalidGenesis
+	ErrInvalidPubProposal      = types.ErrInvalidPubProposal
+	ErrNoProposalHandlerExists = types.ErrNoProposalHandlerExists
+	ErrProposalExpired         = types.ErrProposalExpired
+	ErrUnknownCommittee        = types.ErrUnknownCommittee
+	ErrUnknownProposal         = types.ErrUnknownProposal
+	ErrUnknownVote             = types.ErrUnknownVote
+	ModuleCdc                  = types.ModuleCdc
+	NextProposalIDKey          = types.NextProposalIDKey
+	ProposalKeyPrefix          = types.ProposalKeyPrefix
+	VoteKeyPrefix              = types.VoteKeyPrefix
 )
 
 type (
@@ -101,5 +96,6 @@ type (
 	QueryCommitteeParams    = types.QueryCommitteeParams
 	QueryProposalParams     = types.QueryProposalParams
 	QueryVoteParams         = types.QueryVoteParams
+	TextPermission          = types.TextPermission
 	Vote                    = types.Vote
 )
diff --git a/x/committee/client/cli/query.go b/x/committee/client/cli/query.go
index e97a8499..68928e11 100644
--- a/x/committee/client/cli/query.go
+++ b/x/committee/client/cli/query.go
@@ -8,6 +8,7 @@ import (
 
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/client/context"
+	"github.com/cosmos/cosmos-sdk/client/flags"
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/version"
 
@@ -25,7 +26,7 @@ func GetQueryCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
 		RunE:                       client.ValidateCmd,
 	}
 
-	queryCmd.AddCommand(client.GetCommands(
+	queryCmd.AddCommand(flags.GetCommands(
 		// committees
 		GetCmdQueryCommittee(queryRoute, cdc),
 		GetCmdQueryCommittees(queryRoute, cdc),
diff --git a/x/committee/client/cli/tx.go b/x/committee/client/cli/tx.go
index e3fbbd94..ea8fc273 100644
--- a/x/committee/client/cli/tx.go
+++ b/x/committee/client/cli/tx.go
@@ -1,6 +1,7 @@
 package cli
 
 import (
+	"bufio"
 	"fmt"
 	"io/ioutil"
 	"strconv"
@@ -10,6 +11,7 @@ import (
 
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/client/context"
+	"github.com/cosmos/cosmos-sdk/client/flags"
 	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/version"
@@ -31,7 +33,7 @@ func GetTxCmd(storeKey string, cdc *codec.Codec) *cobra.Command {
 		RunE:                       client.ValidateCmd,
 	}
 
-	txCmd.AddCommand(client.PostCommands(
+	txCmd.AddCommand(flags.PostCommands(
 		GetCmdVote(cdc),
 		GetCmdSubmitProposal(cdc),
 	)...)
@@ -53,7 +55,8 @@ For example:
 		Args:    cobra.ExactArgs(2),
 		Example: fmt.Sprintf("%s tx %s submit-proposal 1 your-proposal.json", version.ClientName, types.ModuleName),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			txBldr := auth.NewTxBuilderFromCLI().WithTxEncoder(utils.GetTxEncoder(cdc))
+			inBuf := bufio.NewReader(cmd.InOrStdin())
+			txBldr := auth.NewTxBuilderFromCLI(inBuf).WithTxEncoder(utils.GetTxEncoder(cdc))
 			cliCtx := context.NewCLIContext().WithCodec(cdc)
 
 			// Get proposing address
@@ -102,7 +105,8 @@ func GetCmdVote(cdc *codec.Codec) *cobra.Command {
 		Long:    "Submit a yes vote for the proposal with id [proposal-id].",
 		Example: fmt.Sprintf("%s tx %s vote 2", version.ClientName, types.ModuleName),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			txBldr := auth.NewTxBuilderFromCLI().WithTxEncoder(utils.GetTxEncoder(cdc))
+			inBuf := bufio.NewReader(cmd.InOrStdin())
+			txBldr := auth.NewTxBuilderFromCLI(inBuf).WithTxEncoder(utils.GetTxEncoder(cdc))
 			cliCtx := context.NewCLIContext().WithCodec(cdc)
 
 			// Get voting address
@@ -142,7 +146,8 @@ and to delete a committee:
 `, MustGetExampleCommitteeChangeProposal(cdc), MustGetExampleCommitteeDeleteProposal(cdc)),
 		Args: cobra.ExactArgs(2),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			txBldr := auth.NewTxBuilderFromCLI().WithTxEncoder(utils.GetTxEncoder(cdc))
+			inBuf := bufio.NewReader(cmd.InOrStdin())
+			txBldr := auth.NewTxBuilderFromCLI(inBuf).WithTxEncoder(utils.GetTxEncoder(cdc))
 			cliCtx := context.NewCLIContext().WithCodec(cdc)
 
 			// Get proposing address
diff --git a/x/committee/handler.go b/x/committee/handler.go
index 23210d43..9129d4e1 100644
--- a/x/committee/handler.go
+++ b/x/committee/handler.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 
 	"github.com/kava-labs/kava/x/committee/keeper"
 	"github.com/kava-labs/kava/x/committee/types"
@@ -11,7 +12,7 @@ import (
 
 // NewHandler creates an sdk.Handler for committee messages
 func NewHandler(k keeper.Keeper) sdk.Handler {
-	return func(ctx sdk.Context, msg sdk.Msg) sdk.Result {
+	return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
 		ctx = ctx.WithEventManager(sdk.NewEventManager())
 
 		switch msg := msg.(type) {
@@ -20,16 +21,15 @@ func NewHandler(k keeper.Keeper) sdk.Handler {
 		case types.MsgVote:
 			return handleMsgVote(ctx, k, msg)
 		default:
-			errMsg := fmt.Sprintf("unrecognized %s msg type: %T", types.ModuleName, msg)
-			return sdk.ErrUnknownRequest(errMsg).Result()
+			return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s message type: %T", ModuleName, msg)
 		}
 	}
 }
 
-func handleMsgSubmitProposal(ctx sdk.Context, k keeper.Keeper, msg types.MsgSubmitProposal) sdk.Result {
+func handleMsgSubmitProposal(ctx sdk.Context, k keeper.Keeper, msg types.MsgSubmitProposal) (*sdk.Result, error) {
 	proposalID, err := k.SubmitProposal(ctx, msg.Proposer, msg.CommitteeID, msg.PubProposal)
 	if err != nil {
-		return err.Result()
+		return nil, err
 	}
 
 	ctx.EventManager().EmitEvent(
@@ -40,28 +40,28 @@ func handleMsgSubmitProposal(ctx sdk.Context, k keeper.Keeper, msg types.MsgSubm
 		),
 	)
 
-	return sdk.Result{
+	return &sdk.Result{
 		Data:   GetKeyFromID(proposalID),
 		Events: ctx.EventManager().Events(),
-	}
+	}, nil
 }
 
-func handleMsgVote(ctx sdk.Context, k keeper.Keeper, msg types.MsgVote) sdk.Result {
+func handleMsgVote(ctx sdk.Context, k keeper.Keeper, msg types.MsgVote) (*sdk.Result, error) {
 	// get the proposal just to add fields to the event
 	proposal, found := k.GetProposal(ctx, msg.ProposalID)
 	if !found {
-		return ErrUnknownProposal(DefaultCodespace, msg.ProposalID).Result()
+		return nil, sdkerrors.Wrapf(ErrUnknownProposal, "%d", msg.ProposalID)
 	}
 
 	err := k.AddVote(ctx, msg.ProposalID, msg.Voter)
 	if err != nil {
-		return err.Result()
+		return nil, err
 	}
 
 	// Enact a proposal if it has enough votes
 	passes, err := k.GetProposalResult(ctx, msg.ProposalID)
 	if err != nil {
-		return err.Result()
+		return nil, err
 	}
 	if passes {
 		err = k.EnactProposal(ctx, msg.ProposalID)
@@ -89,5 +89,5 @@ func handleMsgVote(ctx sdk.Context, k keeper.Keeper, msg types.MsgVote) sdk.Resu
 		),
 	)
 
-	return sdk.Result{Events: ctx.EventManager().Events()}
+	return &sdk.Result{Events: ctx.EventManager().Events()}, nil
 }
diff --git a/x/committee/handler_test.go b/x/committee/handler_test.go
index 69dca714..7ae9d781 100644
--- a/x/committee/handler_test.go
+++ b/x/committee/handler_test.go
@@ -20,7 +20,7 @@ import (
 // NewDistributionGenesisWithPool creates a default distribution genesis state with some coins in the community pool.
 func NewDistributionGenesisWithPool(communityPoolCoins sdk.Coins) app.GenesisState {
 	gs := distribution.DefaultGenesisState()
-	gs.FeePool = distribution.FeePool{CommunityPool: sdk.NewDecCoins(communityPoolCoins)}
+	gs.FeePool = distribution.FeePool{CommunityPool: sdk.NewDecCoinsFromCoins(communityPoolCoins...)}
 	return app.GenesisState{distribution.ModuleName: distribution.ModuleCdc.MustMarshalJSON(gs)}
 }
 
@@ -81,9 +81,9 @@ func (suite *HandlerTestSuite) TestSubmitProposalMsg_Valid() {
 		1,
 	)
 
-	res := suite.handler(suite.ctx, msg)
+	res, err := suite.handler(suite.ctx, msg)
 
-	suite.True(res.IsOK())
+	suite.NoError(err)
 	_, found := suite.keeper.GetProposal(suite.ctx, types.Uint64FromBytes(res.Data))
 	suite.True(found)
 }
@@ -104,9 +104,9 @@ func (suite *HandlerTestSuite) TestSubmitProposalMsg_Invalid() {
 		committeeID,
 	)
 
-	res := suite.handler(suite.ctx, msg)
+	_, err := suite.handler(suite.ctx, msg)
 
-	suite.False(res.IsOK())
+	suite.Error(err)
 	suite.Empty(
 		suite.keeper.GetProposalsByCommittee(suite.ctx, committeeID),
 		"proposal found when none should exist",
@@ -122,9 +122,9 @@ func (suite *HandlerTestSuite) TestSubmitProposalMsg_Unregistered() {
 		committeeID,
 	)
 
-	res := suite.handler(suite.ctx, msg)
+	_, err := suite.handler(suite.ctx, msg)
 
-	suite.False(res.IsOK())
+	suite.Error(err)
 	suite.Empty(
 		suite.keeper.GetProposalsByCommittee(suite.ctx, committeeID),
 		"proposal found when none should exist",
@@ -147,16 +147,16 @@ func (suite *HandlerTestSuite) TestMsgAddVote_ProposalPass() {
 		suite.addresses[0],
 		1,
 	)
-	res := suite.handler(suite.ctx, msg)
-	suite.True(res.IsOK())
+	res, err := suite.handler(suite.ctx, msg)
+	suite.NoError(err)
 	proposalID := types.Uint64FromBytes(res.Data)
-	res = suite.handler(suite.ctx, types.NewMsgVote(suite.addresses[0], proposalID))
-	suite.True(res.IsOK())
+	_, err = suite.handler(suite.ctx, types.NewMsgVote(suite.addresses[0], proposalID))
+	suite.NoError(err)
 
 	// Add a vote to make the proposal pass
-	res = suite.handler(suite.ctx, types.NewMsgVote(suite.addresses[1], proposalID))
+	_, err = suite.handler(suite.ctx, types.NewMsgVote(suite.addresses[1], proposalID))
 
-	suite.True(res.IsOK())
+	suite.NoError(err)
 	// Check the param has been updated
 	suite.Equal(newDebtThreshold, suite.app.GetCDPKeeper().GetParams(suite.ctx).DebtAuctionThreshold)
 	// Check proposal and votes are gone
@@ -181,19 +181,19 @@ func (suite *HandlerTestSuite) TestMsgAddVote_ProposalFail() {
 		suite.addresses[0],
 		1,
 	)
-	res := suite.handler(suite.ctx, msg)
-	suite.True(res.IsOK())
+	res, err := suite.handler(suite.ctx, msg)
+	suite.NoError(err)
 	proposalID := types.Uint64FromBytes(res.Data)
-	res = suite.handler(suite.ctx, types.NewMsgVote(suite.addresses[0], proposalID))
-	suite.True(res.IsOK())
+	_, err = suite.handler(suite.ctx, types.NewMsgVote(suite.addresses[0], proposalID))
+	suite.NoError(err)
 
 	// invalidate the proposal by emptying community pool
 	suite.app.GetDistrKeeper().DistributeFromFeePool(suite.ctx, suite.communityPoolAmt, suite.addresses[0])
 
 	// Add a vote to make the proposal pass
-	res = suite.handler(suite.ctx, types.NewMsgVote(suite.addresses[1], proposalID))
+	_, err = suite.handler(suite.ctx, types.NewMsgVote(suite.addresses[1], proposalID))
 
-	suite.True(res.IsOK())
+	suite.NoError(err)
 	// Check the proposal was not enacted
 	suite.Equal(recipientCoins, suite.app.GetBankKeeper().GetCoins(suite.ctx, recipient))
 	// Check proposal and votes are gone
diff --git a/x/committee/integration_test.go b/x/committee/integration_test.go
index a26d7300..daaf4d8f 100644
--- a/x/committee/integration_test.go
+++ b/x/committee/integration_test.go
@@ -24,9 +24,9 @@ var _ types.PubProposal = UnregisteredPubProposal{}
 // UnregisteredPubProposal is a pubproposal type that is not registered on the amino codec.
 type UnregisteredPubProposal struct{}
 
-func (UnregisteredPubProposal) GetTitle() string         { return "unregistered" }
-func (UnregisteredPubProposal) GetDescription() string   { return "unregistered" }
-func (UnregisteredPubProposal) ProposalRoute() string    { return "unregistered" }
-func (UnregisteredPubProposal) ProposalType() string     { return "unregistered" }
-func (UnregisteredPubProposal) ValidateBasic() sdk.Error { return nil }
-func (UnregisteredPubProposal) String() string           { return "unregistered" }
+func (UnregisteredPubProposal) GetTitle() string       { return "unregistered" }
+func (UnregisteredPubProposal) GetDescription() string { return "unregistered" }
+func (UnregisteredPubProposal) ProposalRoute() string  { return "unregistered" }
+func (UnregisteredPubProposal) ProposalType() string   { return "unregistered" }
+func (UnregisteredPubProposal) ValidateBasic() error   { return nil }
+func (UnregisteredPubProposal) String() string         { return "unregistered" }
diff --git a/x/committee/keeper/keeper.go b/x/committee/keeper/keeper.go
index 1ad4815a..e6b3d9c8 100644
--- a/x/committee/keeper/keeper.go
+++ b/x/committee/keeper/keeper.go
@@ -6,30 +6,29 @@ import (
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/store/prefix"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 	govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
 
 	"github.com/kava-labs/kava/x/committee/types"
 )
 
 type Keeper struct {
-	cdc       *codec.Codec
-	storeKey  sdk.StoreKey
-	codespace sdk.CodespaceType
+	cdc      *codec.Codec
+	storeKey sdk.StoreKey
 
 	// Proposal router
 	router govtypes.Router
 }
 
-func NewKeeper(cdc *codec.Codec, storeKey sdk.StoreKey, router govtypes.Router, codespace sdk.CodespaceType) Keeper {
+func NewKeeper(cdc *codec.Codec, storeKey sdk.StoreKey, router govtypes.Router) Keeper {
 	// Logic in the keeper methods assume the set of gov handlers is fixed.
 	// So the gov router must be sealed so no handlers can be added or removed after the keeper is created.
 	router.Seal()
 
 	return Keeper{
-		cdc:       cdc,
-		storeKey:  storeKey,
-		codespace: codespace,
-		router:    router,
+		cdc:      cdc,
+		storeKey: storeKey,
+		router:   router,
 	}
 }
 
@@ -99,17 +98,17 @@ func (k Keeper) SetNextProposalID(ctx sdk.Context, id uint64) {
 }
 
 // GetNextProposalID reads the next available global ID from store
-func (k Keeper) GetNextProposalID(ctx sdk.Context) (uint64, sdk.Error) {
+func (k Keeper) GetNextProposalID(ctx sdk.Context) (uint64, error) {
 	store := ctx.KVStore(k.storeKey)
 	bz := store.Get(types.NextProposalIDKey)
 	if bz == nil {
-		return 0, types.ErrInvalidGenesis(k.codespace, "next proposal ID not set at genesis")
+		return 0, sdkerrors.Wrap(types.ErrInvalidGenesis, "next proposal ID not set at genesis")
 	}
 	return types.Uint64FromBytes(bz), nil
 }
 
 // IncrementNextProposalID increments the next proposal ID in the store by 1.
-func (k Keeper) IncrementNextProposalID(ctx sdk.Context) sdk.Error {
+func (k Keeper) IncrementNextProposalID(ctx sdk.Context) error {
 	id, err := k.GetNextProposalID(ctx)
 	if err != nil {
 		return err
@@ -119,7 +118,7 @@ func (k Keeper) IncrementNextProposalID(ctx sdk.Context) sdk.Error {
 }
 
 // StoreNewProposal stores a proposal, adding a new ID
-func (k Keeper) StoreNewProposal(ctx sdk.Context, pubProposal types.PubProposal, committeeID uint64, deadline time.Time) (uint64, sdk.Error) {
+func (k Keeper) StoreNewProposal(ctx sdk.Context, pubProposal types.PubProposal, committeeID uint64, deadline time.Time) (uint64, error) {
 	newProposalID, err := k.GetNextProposalID(ctx)
 	if err != nil {
 		return 0, err
diff --git a/x/committee/keeper/proposal.go b/x/committee/keeper/proposal.go
index f2db48c5..47fbd8b4 100644
--- a/x/committee/keeper/proposal.go
+++ b/x/committee/keeper/proposal.go
@@ -4,24 +4,25 @@ import (
 	"fmt"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 
 	"github.com/kava-labs/kava/x/committee/types"
 )
 
 // SubmitProposal adds a proposal to a committee so that it can be voted on.
-func (k Keeper) SubmitProposal(ctx sdk.Context, proposer sdk.AccAddress, committeeID uint64, pubProposal types.PubProposal) (uint64, sdk.Error) {
+func (k Keeper) SubmitProposal(ctx sdk.Context, proposer sdk.AccAddress, committeeID uint64, pubProposal types.PubProposal) (uint64, error) {
 	// Limit proposals to only be submitted by committee members
 	com, found := k.GetCommittee(ctx, committeeID)
 	if !found {
-		return 0, types.ErrUnknownCommittee(k.codespace, committeeID)
+		return 0, sdkerrors.Wrapf(types.ErrUnknownCommittee, "%d", committeeID)
 	}
 	if !com.HasMember(proposer) {
-		return 0, sdk.ErrUnauthorized("proposer not member of committee")
+		return 0, sdkerrors.Wrap(sdkerrors.ErrUnauthorized, "proposer not member of committee")
 	}
 
 	// Check committee has permissions to enact proposal.
 	if !com.HasPermissionsFor(pubProposal) {
-		return 0, sdk.ErrUnauthorized("committee does not have permissions to enact proposal")
+		return 0, sdkerrors.Wrap(sdkerrors.ErrUnauthorized, "committee does not have permissions to enact proposal")
 	}
 
 	// Check proposal is valid
@@ -47,21 +48,22 @@ func (k Keeper) SubmitProposal(ctx sdk.Context, proposer sdk.AccAddress, committ
 }
 
 // AddVote submits a vote on a proposal.
-func (k Keeper) AddVote(ctx sdk.Context, proposalID uint64, voter sdk.AccAddress) sdk.Error {
+func (k Keeper) AddVote(ctx sdk.Context, proposalID uint64, voter sdk.AccAddress) error {
 	// Validate
 	pr, found := k.GetProposal(ctx, proposalID)
 	if !found {
-		return types.ErrUnknownProposal(k.codespace, proposalID)
+		return sdkerrors.Wrapf(types.ErrUnknownProposal, "%d", proposalID)
 	}
 	if pr.HasExpiredBy(ctx.BlockTime()) {
-		return types.ErrProposalExpired(k.codespace, ctx.BlockTime(), pr.Deadline)
+		return sdkerrors.Wrapf(types.ErrProposalExpired, "%s ≥ %s", ctx.BlockTime(), pr.Deadline)
+
 	}
 	com, found := k.GetCommittee(ctx, pr.CommitteeID)
 	if !found {
-		return types.ErrUnknownCommittee(k.codespace, pr.CommitteeID)
+		return sdkerrors.Wrapf(types.ErrUnknownCommittee, "%d", pr.CommitteeID)
 	}
 	if !com.HasMember(voter) {
-		return sdk.ErrUnauthorized("voter must be a member of committee")
+		return sdkerrors.Wrap(sdkerrors.ErrUnauthorized, "voter must be a member of committee")
 	}
 
 	// Store vote, overwriting any prior vote
@@ -78,14 +80,14 @@ func (k Keeper) AddVote(ctx sdk.Context, proposalID uint64, voter sdk.AccAddress
 }
 
 // GetProposalResult calculates if a proposal currently has enough votes to pass.
-func (k Keeper) GetProposalResult(ctx sdk.Context, proposalID uint64) (bool, sdk.Error) {
+func (k Keeper) GetProposalResult(ctx sdk.Context, proposalID uint64) (bool, error) {
 	pr, found := k.GetProposal(ctx, proposalID)
 	if !found {
-		return false, types.ErrUnknownProposal(k.codespace, proposalID)
+		return false, sdkerrors.Wrapf(types.ErrUnknownProposal, "%d", proposalID)
 	}
 	com, found := k.GetCommittee(ctx, pr.CommitteeID)
 	if !found {
-		return false, types.ErrUnknownCommittee(k.codespace, pr.CommitteeID)
+		return false, sdkerrors.Wrapf(types.ErrUnknownCommittee, "%d", pr.CommitteeID)
 	}
 
 	numVotes := k.TallyVotes(ctx, proposalID)
@@ -104,10 +106,10 @@ func (k Keeper) TallyVotes(ctx sdk.Context, proposalID uint64) int64 {
 }
 
 // EnactProposal makes the changes proposed in a proposal.
-func (k Keeper) EnactProposal(ctx sdk.Context, proposalID uint64) sdk.Error {
+func (k Keeper) EnactProposal(ctx sdk.Context, proposalID uint64) error {
 	pr, found := k.GetProposal(ctx, proposalID)
 	if !found {
-		return types.ErrUnknownProposal(k.codespace, proposalID)
+		return sdkerrors.Wrapf(types.ErrUnknownProposal, "%d", proposalID)
 	}
 
 	if err := k.ValidatePubProposal(ctx, pr.PubProposal); err != nil {
@@ -144,16 +146,16 @@ func (k Keeper) CloseExpiredProposals(ctx sdk.Context) {
 }
 
 // ValidatePubProposal checks if a pubproposal is valid.
-func (k Keeper) ValidatePubProposal(ctx sdk.Context, pubProposal types.PubProposal) (returnErr sdk.Error) {
+func (k Keeper) ValidatePubProposal(ctx sdk.Context, pubProposal types.PubProposal) (returnErr error) {
 	if pubProposal == nil {
-		return types.ErrInvalidPubProposal(k.codespace, "pub proposal cannot be nil")
+		return sdkerrors.Wrap(types.ErrInvalidPubProposal, "pub proposal cannot be nil")
 	}
 	if err := pubProposal.ValidateBasic(); err != nil {
 		return err
 	}
 
 	if !k.router.HasRoute(pubProposal.ProposalRoute()) {
-		return types.ErrNoProposalHandlerExists(k.codespace, pubProposal)
+		return sdkerrors.Wrapf(types.ErrNoProposalHandlerExists, "%T", pubProposal)
 	}
 
 	// Run the proposal's changes through the associated handler using a cached version of state to ensure changes are not permanent.
@@ -166,7 +168,7 @@ func (k Keeper) ValidatePubProposal(ctx sdk.Context, pubProposal types.PubPropos
 	// reference: https://stackoverflow.com/questions/33167282/how-to-return-a-value-in-a-go-function-that-panics?noredirect=1&lq=1
 	defer func() {
 		if r := recover(); r != nil {
-			returnErr = types.ErrInvalidPubProposal(k.codespace, fmt.Sprintf("proposal handler panicked: %s", r))
+			returnErr = sdkerrors.Wrapf(types.ErrInvalidPubProposal, "proposal handler panicked: %s", r)
 		}
 	}()
 
diff --git a/x/committee/keeper/querier.go b/x/committee/keeper/querier.go
index a1a1a002..6e33c7c1 100644
--- a/x/committee/keeper/querier.go
+++ b/x/committee/keeper/querier.go
@@ -1,10 +1,9 @@
 package keeper
 
 import (
-	"fmt"
-
 	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 	abci "github.com/tendermint/tendermint/abci/types"
 
 	"github.com/kava-labs/kava/x/committee/types"
@@ -12,7 +11,7 @@ import (
 
 // NewQuerier creates a new gov Querier instance
 func NewQuerier(keeper Keeper) sdk.Querier {
-	return func(ctx sdk.Context, path []string, req abci.RequestQuery) ([]byte, sdk.Error) {
+	return func(ctx sdk.Context, path []string, req abci.RequestQuery) ([]byte, error) {
 		switch path[0] {
 
 		case types.QueryCommittees:
@@ -31,7 +30,7 @@ func NewQuerier(keeper Keeper) sdk.Querier {
 			return queryTally(ctx, path[1:], req, keeper)
 
 		default:
-			return nil, sdk.ErrUnknownRequest(fmt.Sprintf("unknown %s query endpoint", types.ModuleName))
+			return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unknown %s query endpoint", types.ModuleName)
 		}
 	}
 }
@@ -40,32 +39,32 @@ func NewQuerier(keeper Keeper) sdk.Querier {
 //				Committees
 // ------------------------------------------
 
-func queryCommittees(ctx sdk.Context, path []string, _ abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
+func queryCommittees(ctx sdk.Context, path []string, _ abci.RequestQuery, keeper Keeper) ([]byte, error) {
 
 	committees := keeper.GetCommittees(ctx)
 
 	bz, err := codec.MarshalJSONIndent(keeper.cdc, committees)
 	if err != nil {
-		return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
 	}
 	return bz, nil
 }
 
-func queryCommittee(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
+func queryCommittee(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
 	var params types.QueryCommitteeParams
 	err := keeper.cdc.UnmarshalJSON(req.Data, &params)
 	if err != nil {
-		return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
 	}
 
 	committee, found := keeper.GetCommittee(ctx, params.CommitteeID)
 	if !found {
-		return nil, types.ErrUnknownCommittee(types.DefaultCodespace, params.CommitteeID)
+		return nil, sdkerrors.Wrapf(types.ErrUnknownCommittee, "%d", params.CommitteeID)
 	}
 
 	bz, err := codec.MarshalJSONIndent(keeper.cdc, committee)
 	if err != nil {
-		return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
 	}
 	return bz, nil
 }
@@ -74,37 +73,37 @@ func queryCommittee(ctx sdk.Context, path []string, req abci.RequestQuery, keepe
 //				Proposals
 // ------------------------------------------
 
-func queryProposals(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
+func queryProposals(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
 	var params types.QueryCommitteeParams
 	err := keeper.cdc.UnmarshalJSON(req.Data, &params)
 	if err != nil {
-		return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
 	}
 
 	proposals := keeper.GetProposalsByCommittee(ctx, params.CommitteeID)
 
 	bz, err := codec.MarshalJSONIndent(keeper.cdc, proposals)
 	if err != nil {
-		return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
 	}
 	return bz, nil
 }
 
-func queryProposal(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
+func queryProposal(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
 	var params types.QueryProposalParams
 	err := keeper.cdc.UnmarshalJSON(req.Data, &params)
 	if err != nil {
-		return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
 	}
 
 	proposal, found := keeper.GetProposal(ctx, params.ProposalID)
 	if !found {
-		return nil, types.ErrUnknownProposal(types.DefaultCodespace, params.ProposalID)
+		return nil, sdkerrors.Wrapf(types.ErrUnknownProposal, "%d", params.ProposalID)
 	}
 
 	bz, err := codec.MarshalJSONIndent(keeper.cdc, proposal)
 	if err != nil {
-		return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
 	}
 	return bz, nil
 }
@@ -113,38 +112,38 @@ func queryProposal(ctx sdk.Context, path []string, req abci.RequestQuery, keeper
 //				Votes
 // ------------------------------------------
 
-func queryVotes(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
+func queryVotes(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
 	var params types.QueryProposalParams
 	err := keeper.cdc.UnmarshalJSON(req.Data, &params)
 
 	if err != nil {
-		return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
 	}
 
 	votes := keeper.GetVotesByProposal(ctx, params.ProposalID)
 
 	bz, err := codec.MarshalJSONIndent(keeper.cdc, votes)
 	if err != nil {
-		return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
 	}
 	return bz, nil
 }
 
-func queryVote(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
+func queryVote(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
 	var params types.QueryVoteParams
 	err := keeper.cdc.UnmarshalJSON(req.Data, &params)
 	if err != nil {
-		return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
 	}
 
 	vote, found := keeper.GetVote(ctx, params.ProposalID, params.Voter)
 	if !found {
-		return nil, types.ErrUnknownVote(types.DefaultCodespace, params.ProposalID, params.Voter)
+		return nil, sdkerrors.Wrapf(types.ErrUnknownVote, "proposal id: %d, voter: %s", params.ProposalID, params.Voter)
 	}
 
 	bz, err := codec.MarshalJSONIndent(keeper.cdc, vote)
 	if err != nil {
-		return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
 	}
 	return bz, nil
 }
@@ -153,22 +152,22 @@ func queryVote(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Kee
 //				Tally
 // ------------------------------------------
 
-func queryTally(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
+func queryTally(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
 	var params types.QueryProposalParams
 	err := keeper.cdc.UnmarshalJSON(req.Data, &params)
 	if err != nil {
-		return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
 	}
 
 	_, found := keeper.GetProposal(ctx, params.ProposalID)
 	if !found {
-		return nil, types.ErrUnknownProposal(types.DefaultCodespace, params.ProposalID)
+		return nil, sdkerrors.Wrapf(types.ErrUnknownProposal, "%d", params.ProposalID)
 	}
 	numVotes := keeper.TallyVotes(ctx, params.ProposalID)
 
 	bz, err := codec.MarshalJSONIndent(keeper.cdc, numVotes)
 	if err != nil {
-		return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
 	}
 	return bz, nil
 }
diff --git a/x/committee/module.go b/x/committee/module.go
index f39e8c44..1423eff7 100644
--- a/x/committee/module.go
+++ b/x/committee/module.go
@@ -11,6 +11,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
+	"github.com/cosmos/cosmos-sdk/x/auth"
 	sim "github.com/cosmos/cosmos-sdk/x/simulation"
 	abci "github.com/tendermint/tendermint/abci/types"
 
@@ -22,7 +23,7 @@ import (
 var (
 	_ module.AppModule           = AppModule{}
 	_ module.AppModuleBasic      = AppModuleBasic{}
-	_ module.AppModuleSimulation = AppModuleSimulation{}
+	_ module.AppModuleSimulation = AppModule{}
 )
 
 // AppModuleBasic app module basics object
@@ -70,39 +71,20 @@ func (AppModuleBasic) GetQueryCmd(cdc *codec.Codec) *cobra.Command {
 
 //____________________________________________________________________________
 
-// AppModuleSimulation defines the module simulation functions used by the module.
-type AppModuleSimulation struct{}
-
-// RegisterStoreDecoder registers a decoder for the module's types
-func (AppModuleSimulation) RegisterStoreDecoder(sdr sdk.StoreDecoderRegistry) {
-	sdr[StoreKey] = simulation.DecodeStore
-}
-
-// GenerateGenesisState creates a randomized GenState of the module
-func (AppModuleSimulation) GenerateGenesisState(simState *module.SimulationState) {
-	simulation.RandomizedGenState(simState)
-}
-
-// RandomizedParams creates randomized param changes for the simulator.
-func (AppModuleSimulation) RandomizedParams(r *rand.Rand) []sim.ParamChange {
-	return simulation.ParamChanges(r)
-}
-
-//____________________________________________________________________________
-
 // AppModule app module type
 type AppModule struct {
 	AppModuleBasic
-	AppModuleSimulation
 
-	keeper Keeper
+	keeper        Keeper
+	accountKeeper auth.AccountKeeper
 }
 
 // NewAppModule creates a new AppModule object
-func NewAppModule(keeper Keeper) AppModule {
+func NewAppModule(keeper Keeper, accountKeeper auth.AccountKeeper) AppModule {
 	return AppModule{
 		AppModuleBasic: AppModuleBasic{},
 		keeper:         keeper,
+		accountKeeper:  accountKeeper,
 	}
 }
 
@@ -116,7 +98,7 @@ func (AppModule) RegisterInvariants(_ sdk.InvariantRegistry) {}
 
 // Route module message route name
 func (AppModule) Route() string {
-	return ModuleName
+	return RouterKey
 }
 
 // NewHandler module handler
@@ -126,7 +108,7 @@ func (am AppModule) NewHandler() sdk.Handler {
 
 // QuerierRoute module querier route name
 func (AppModule) QuerierRoute() string {
-	return ModuleName
+	return QuerierRoute
 }
 
 // NewQuerierHandler module querier
@@ -158,3 +140,30 @@ func (am AppModule) BeginBlock(ctx sdk.Context, req abci.RequestBeginBlock) {
 func (am AppModule) EndBlock(_ sdk.Context, _ abci.RequestEndBlock) []abci.ValidatorUpdate {
 	return []abci.ValidatorUpdate{}
 }
+
+//____________________________________________________________________________
+
+// GenerateGenesisState creates a randomized GenState for the module
+func (AppModuleBasic) GenerateGenesisState(simState *module.SimulationState) {
+	simulation.RandomizedGenState(simState)
+}
+
+// TODO
+func (AppModuleBasic) ProposalContents(_ module.SimulationState) []sim.WeightedProposalContent {
+	return nil
+}
+
+// RandomizedParams returns functions that generate params for the module.
+func (AppModuleBasic) RandomizedParams(r *rand.Rand) []sim.ParamChange {
+	return nil
+}
+
+// RegisterStoreDecoder registers a decoder for the module's types
+func (AppModuleBasic) RegisterStoreDecoder(sdr sdk.StoreDecoderRegistry) {
+	sdr[StoreKey] = simulation.DecodeStore
+}
+
+// WeightedOperations returns the all the auction module operations with their respective weights.
+func (am AppModule) WeightedOperations(simState module.SimulationState) []sim.WeightedOperation {
+	return nil // TODO simulation.WeightedOperations(simState.AppParams, simState.Cdc, am.accountKeeper, am.keeper)
+}
diff --git a/x/committee/proposal_handler.go b/x/committee/proposal_handler.go
index da5a049e..bae3d4ff 100644
--- a/x/committee/proposal_handler.go
+++ b/x/committee/proposal_handler.go
@@ -1,14 +1,13 @@
 package committee
 
 import (
-	"fmt"
-
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 	govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
 )
 
 func NewProposalHandler(k Keeper) govtypes.Handler {
-	return func(ctx sdk.Context, content govtypes.Content) sdk.Error {
+	return func(ctx sdk.Context, content govtypes.Content) error {
 		switch c := content.(type) {
 		case CommitteeChangeProposal:
 			return handleCommitteeChangeProposal(ctx, k, c)
@@ -16,15 +15,14 @@ func NewProposalHandler(k Keeper) govtypes.Handler {
 			return handleCommitteeDeleteProposal(ctx, k, c)
 
 		default:
-			errMsg := fmt.Sprintf("unrecognized %s proposal content type: %T", ModuleName, c)
-			return sdk.ErrUnknownRequest(errMsg)
+			return sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s proposal content type: %T", ModuleName, c)
 		}
 	}
 }
 
-func handleCommitteeChangeProposal(ctx sdk.Context, k Keeper, committeeProposal CommitteeChangeProposal) sdk.Error {
+func handleCommitteeChangeProposal(ctx sdk.Context, k Keeper, committeeProposal CommitteeChangeProposal) error {
 	if err := committeeProposal.ValidateBasic(); err != nil {
-		return ErrInvalidCommittee(DefaultCodespace, err.Error())
+		return sdkerrors.Wrap(ErrInvalidPubProposal, err.Error())
 	}
 
 	// Remove all committee's ongoing proposals
@@ -41,9 +39,9 @@ func handleCommitteeChangeProposal(ctx sdk.Context, k Keeper, committeeProposal
 	return nil
 }
 
-func handleCommitteeDeleteProposal(ctx sdk.Context, k Keeper, committeeProposal CommitteeDeleteProposal) sdk.Error {
+func handleCommitteeDeleteProposal(ctx sdk.Context, k Keeper, committeeProposal CommitteeDeleteProposal) error {
 	if err := committeeProposal.ValidateBasic(); err != nil {
-		return ErrInvalidPubProposal(DefaultCodespace, err.Error())
+		return sdkerrors.Wrap(ErrInvalidPubProposal, err.Error())
 	}
 
 	// Remove all committee's ongoing proposals
diff --git a/x/committee/simulation/decoder.go b/x/committee/simulation/decoder.go
index 2cdd439b..bcbba73f 100644
--- a/x/committee/simulation/decoder.go
+++ b/x/committee/simulation/decoder.go
@@ -2,11 +2,11 @@ package simulation
 
 import (
 	"github.com/cosmos/cosmos-sdk/codec"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	"github.com/tendermint/tendermint/libs/kv"
 )
 
 // DecodeStore unmarshals the KVPair's Value to the corresponding module type
-func DecodeStore(cdc *codec.Codec, kvA, kvB cmn.KVPair) string {
+func DecodeStore(cdc *codec.Codec, kvA, kvB kv.Pair) string {
 	// TODO implement this
 	return ""
 }
diff --git a/x/committee/simulation/genesis.go b/x/committee/simulation/genesis.go
index 5f11ea53..22a25439 100644
--- a/x/committee/simulation/genesis.go
+++ b/x/committee/simulation/genesis.go
@@ -6,7 +6,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/types/module"
 
-	"github.com/kava-labs/kava/x/auction/types"
+	"github.com/kava-labs/kava/x/committee/types"
 )
 
 // RandomizedGenState generates a random GenesisState for the module
diff --git a/x/committee/types/codec.go b/x/committee/types/codec.go
index bdac0489..5c246fc0 100644
--- a/x/committee/types/codec.go
+++ b/x/committee/types/codec.go
@@ -24,7 +24,6 @@ func RegisterModuleCodec(cdc *codec.Codec) {
 	cdc.RegisterConcrete(distribution.CommunityPoolSpendProposal{}, "cosmos-sdk/CommunityPoolSpendProposal", nil)
 	cdc.RegisterConcrete(params.ParameterChangeProposal{}, "cosmos-sdk/ParameterChangeProposal", nil)
 	cdc.RegisterConcrete(gov.TextProposal{}, "cosmos-sdk/TextProposal", nil)
-	cdc.RegisterConcrete(gov.SoftwareUpgradeProposal{}, "cosmos-sdk/SoftwareUpgradeProposal", nil)
 
 	RegisterAppCodec(cdc)
 }
@@ -43,6 +42,7 @@ func RegisterAppCodec(cdc *codec.Codec) {
 	cdc.RegisterInterface((*Permission)(nil), nil)
 	cdc.RegisterConcrete(GodPermission{}, "kava/GodPermission", nil)
 	cdc.RegisterConcrete(ParamChangePermission{}, "kava/ParamChangePermission", nil)
+	cdc.RegisterConcrete(TextPermission{}, "kava/TextPermission", nil)
 
 	// Msgs
 	cdc.RegisterConcrete(MsgSubmitProposal{}, "kava/MsgSubmitProposal", nil)
diff --git a/x/committee/types/committee_test.go b/x/committee/types/committee_test.go
index 1f7ec077..434b2049 100644
--- a/x/committee/types/committee_test.go
+++ b/x/committee/types/committee_test.go
@@ -37,7 +37,6 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 					{
 						Subspace: "cdp",
 						Key:      "DebtThreshold",
-						Subkey:   "",
 					},
 				}}},
 			pubProposal: params.NewParameterChangeProposal(
@@ -47,8 +46,8 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 					{
 						Subspace: "cdp",
 						Key:      "DebtThreshold",
-						Subkey:   "",
-						Value:    `{"denom": "usdx", "amount": "1000000"}`,
+
+						Value: `{"denom": "usdx", "amount": "1000000"}`,
 					},
 				},
 			),
@@ -62,7 +61,6 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 						{
 							Subspace: "cdp",
 							Key:      "DebtThreshold",
-							Subkey:   "",
 						},
 					}},
 				TextPermission{},
@@ -78,7 +76,6 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 						{
 							Subspace: "cdp",
 							Key:      "DebtThreshold",
-							Subkey:   "",
 						},
 					}},
 				GodPermission{},
@@ -90,8 +87,8 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 					{
 						Subspace: "cdp",
 						Key:      "CollateralParams",
-						Subkey:   "",
-						Value:    `[]`,
+
+						Value: `[]`,
 					},
 				},
 			),
@@ -107,8 +104,8 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 					{
 						Subspace: "cdp",
 						Key:      "CollateralParams",
-						Subkey:   "",
-						Value:    `[]`,
+
+						Value: `[]`,
 					},
 				},
 			),
@@ -123,7 +120,6 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 						{
 							Subspace: "cdp",
 							Key:      "DebtThreshold",
-							Subkey:   "",
 						},
 					}},
 				ParamChangePermission{
@@ -131,7 +127,6 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 						{
 							Subspace: "cdp",
 							Key:      "DebtParams",
-							Subkey:   "",
 						},
 					}},
 			},
@@ -142,14 +137,14 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 					{
 						Subspace: "cdp",
 						Key:      "DebtThreshold",
-						Subkey:   "",
-						Value:    `{"denom": "usdx", "amount": "1000000"}`,
+
+						Value: `{"denom": "usdx", "amount": "1000000"}`,
 					},
 					{
 						Subspace: "cdp",
 						Key:      "DebtParams",
-						Subkey:   "",
-						Value:    `[]`,
+
+						Value: `[]`,
 					},
 				},
 			),
@@ -163,7 +158,6 @@ func (suite *TypesTestSuite) TestCommittee_HasPermissionsFor() {
 						{
 							Subspace: "cdp",
 							Key:      "DebtThreshold",
-							Subkey:   "",
 						},
 					}},
 			},
diff --git a/x/committee/types/errors.go b/x/committee/types/errors.go
index 0fa66126..e64766a4 100644
--- a/x/committee/types/errors.go
+++ b/x/committee/types/errors.go
@@ -1,50 +1,17 @@
 package types
 
 import (
-	"fmt"
-	"time"
-
-	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 )
 
-const (
-	DefaultCodespace sdk.CodespaceType = ModuleName
-
-	CodeProposalExpired  sdk.CodeType = 1
-	CodeUnknownItem      sdk.CodeType = 2
-	CodeInvalidGenesis   sdk.CodeType = 3
-	CodeInvalidProposal  sdk.CodeType = 4
-	CodeInvalidCommittee sdk.CodeType = 5
+// TODO nums ok?
+var (
+	ErrUnknownCommittee        = sdkerrors.Register(ModuleName, 2, "committee not found")
+	ErrInvalidCommittee        = sdkerrors.Register(ModuleName, 3, "invalid committee")
+	ErrUnknownProposal         = sdkerrors.Register(ModuleName, 4, "proposal not found")
+	ErrProposalExpired         = sdkerrors.Register(ModuleName, 5, "proposal expired")
+	ErrInvalidPubProposal      = sdkerrors.Register(ModuleName, 6, "invalid pubproposal")
+	ErrUnknownVote             = sdkerrors.Register(ModuleName, 7, "vote not found")
+	ErrInvalidGenesis          = sdkerrors.Register(ModuleName, 8, "invalid genesis")
+	ErrNoProposalHandlerExists = sdkerrors.Register(ModuleName, 9, "pubproposal has no corresponding handler")
 )
-
-func ErrUnknownCommittee(codespace sdk.CodespaceType, id uint64) sdk.Error {
-	return sdk.NewError(codespace, CodeUnknownItem, fmt.Sprintf("committee with id '%d' not found", id))
-}
-
-func ErrInvalidCommittee(codespace sdk.CodespaceType, msg string) sdk.Error {
-	return sdk.NewError(codespace, CodeInvalidCommittee, msg)
-}
-
-func ErrUnknownProposal(codespace sdk.CodespaceType, id uint64) sdk.Error {
-	return sdk.NewError(codespace, CodeUnknownItem, fmt.Sprintf("proposal with id '%d' not found", id))
-}
-
-func ErrProposalExpired(codespace sdk.CodespaceType, blockTime, expiry time.Time) sdk.Error {
-	return sdk.NewError(codespace, CodeProposalExpired, fmt.Sprintf("proposal expired at %s, current blocktime %s", expiry, blockTime))
-}
-
-func ErrInvalidPubProposal(codespace sdk.CodespaceType, msg string) sdk.Error {
-	return sdk.NewError(codespace, CodeInvalidProposal, msg)
-}
-
-func ErrUnknownVote(codespace sdk.CodespaceType, proposalID uint64, voter sdk.AccAddress) sdk.Error {
-	return sdk.NewError(codespace, CodeUnknownItem, fmt.Sprintf("vote with for proposal '%d' and voter %s not found", proposalID, voter))
-}
-
-func ErrInvalidGenesis(codespace sdk.CodespaceType, msg string) sdk.Error {
-	return sdk.NewError(codespace, CodeInvalidGenesis, msg)
-}
-
-func ErrNoProposalHandlerExists(codespace sdk.CodespaceType, content interface{}) sdk.Error {
-	return sdk.NewError(codespace, CodeUnknownItem, fmt.Sprintf("'%T' does not have a corresponding handler", content))
-}
diff --git a/x/committee/types/msg.go b/x/committee/types/msg.go
index 5e2b138b..50ac64f6 100644
--- a/x/committee/types/msg.go
+++ b/x/committee/types/msg.go
@@ -2,6 +2,7 @@ package types
 
 import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 )
 
 const (
@@ -34,12 +35,12 @@ func (msg MsgSubmitProposal) Route() string { return RouterKey }
 func (msg MsgSubmitProposal) Type() string { return TypeMsgSubmitProposal }
 
 // ValidateBasic does a simple validation check that doesn't require access to any other information.
-func (msg MsgSubmitProposal) ValidateBasic() sdk.Error {
+func (msg MsgSubmitProposal) ValidateBasic() error {
 	if msg.PubProposal == nil {
-		return ErrInvalidPubProposal(DefaultCodespace, "pub proposal cannot be nil")
+		return sdkerrors.Wrap(ErrInvalidPubProposal, "pub proposal cannot be nil")
 	}
 	if msg.Proposer.Empty() {
-		return sdk.ErrInvalidAddress(msg.Proposer.String())
+		return sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, "proposer address cannot be empty")
 	}
 
 	return msg.PubProposal.ValidateBasic()
@@ -74,9 +75,9 @@ func (msg MsgVote) Route() string { return RouterKey }
 func (msg MsgVote) Type() string { return TypeMsgVote }
 
 // ValidateBasic does a simple validation check that doesn't require access to any other information.
-func (msg MsgVote) ValidateBasic() sdk.Error {
+func (msg MsgVote) ValidateBasic() error {
 	if msg.Voter.Empty() {
-		return sdk.ErrInvalidAddress(msg.Voter.String())
+		return sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, "voter address cannot be empty")
 	}
 	return nil
 }
diff --git a/x/committee/types/permissions.go b/x/committee/types/permissions.go
index 6608d9bd..1b33a46e 100644
--- a/x/committee/types/permissions.go
+++ b/x/committee/types/permissions.go
@@ -76,13 +76,12 @@ func (perm ParamChangePermission) MarshalYAML() (interface{}, error) {
 type AllowedParam struct {
 	Subspace string `json:"subspace" yaml:"subspace"`
 	Key      string `json:"key" yaml:"key"`
-	Subkey   string `json:"subkey,omitempty" yaml:"subkey,omitempty"`
 }
 type AllowedParams []AllowedParam
 
 func (allowed AllowedParams) Contains(paramChange params.ParamChange) bool {
 	for _, p := range allowed {
-		if paramChange.Subspace == p.Subspace && paramChange.Key == p.Key && paramChange.Subkey == p.Subkey {
+		if paramChange.Subspace == p.Subspace && paramChange.Key == p.Key {
 			return true
 		}
 	}
diff --git a/x/committee/types/permissions_test.go b/x/committee/types/permissions_test.go
index 9794d10a..96a2fa25 100644
--- a/x/committee/types/permissions_test.go
+++ b/x/committee/types/permissions_test.go
@@ -19,22 +19,18 @@ func (suite *PermissionsTestSuite) SetupTest() {
 		{
 			Subspace: "cdp",
 			Key:      "DebtThreshold",
-			Subkey:   "",
 		},
 		{
 			Subspace: "cdp",
 			Key:      "SurplusThreshold",
-			Subkey:   "",
 		},
 		{
 			Subspace: "cdp",
 			Key:      "CollateralParams",
-			Subkey:   "",
 		},
 		{
 			Subspace: "auction",
 			Key:      "BidDuration",
-			Subkey:   "",
 		},
 	}
 }
@@ -56,8 +52,8 @@ func (suite *PermissionsTestSuite) TestParamChangePermission_Allows() {
 					{
 						Subspace: "cdp",
 						Key:      "DebtThreshold",
-						Subkey:   "",
-						Value:    `{"denom": "usdx", "amount": "1000000"}`,
+
+						Value: `{"denom": "usdx", "amount": "1000000"}`,
 					},
 				},
 			),
@@ -73,14 +69,14 @@ func (suite *PermissionsTestSuite) TestParamChangePermission_Allows() {
 					{
 						Subspace: "cdp",
 						Key:      "DebtThreshold",
-						Subkey:   "",
-						Value:    `{"denom": "usdx", "amount": "1000000"}`,
+
+						Value: `{"denom": "usdx", "amount": "1000000"}`,
 					},
 					{
 						Subspace: "cdp",
 						Key:      "CollateralParams",
-						Subkey:   "",
-						Value:    `[]`,
+
+						Value: `[]`,
 					},
 				},
 			),
@@ -96,8 +92,8 @@ func (suite *PermissionsTestSuite) TestParamChangePermission_Allows() {
 					{
 						Subspace: "cdp",
 						Key:      "GlobalDebtLimit",
-						Subkey:   "",
-						Value:    `{"denom": "usdx", "amount": "1000000000"}`,
+
+						Value: `{"denom": "usdx", "amount": "1000000000"}`,
 					},
 				},
 			),
@@ -113,8 +109,8 @@ func (suite *PermissionsTestSuite) TestParamChangePermission_Allows() {
 					{
 						Subspace: "cdp",
 						Key:      "DebtThreshold",
-						Subkey:   "",
-						Value:    `[{"denom": "usdx", "amount": "1000000"}]`,
+
+						Value: `[{"denom": "usdx", "amount": "1000000"}]`,
 					},
 				},
 			),
@@ -160,8 +156,8 @@ func (suite *PermissionsTestSuite) TestAllowedParams_Contains() {
 			testParam: params.ParamChange{
 				Subspace: "cdp",
 				Key:      "DebtThreshold",
-				Subkey:   "",
-				Value:    `{"denom": "usdx", "amount": "1000000"}`,
+
+				Value: `{"denom": "usdx", "amount": "1000000"}`,
 			},
 			expectContained: true,
 		},
@@ -171,8 +167,8 @@ func (suite *PermissionsTestSuite) TestAllowedParams_Contains() {
 			testParam: params.ParamChange{
 				Subspace: "",
 				Key:      "DebtThreshold",
-				Subkey:   "",
-				Value:    `{"denom": "usdx", "amount": "1000000"}`,
+
+				Value: `{"denom": "usdx", "amount": "1000000"}`,
 			},
 			expectContained: false,
 		},
@@ -182,8 +178,8 @@ func (suite *PermissionsTestSuite) TestAllowedParams_Contains() {
 			testParam: params.ParamChange{
 				Subspace: "cdp",
 				Key:      "",
-				Subkey:   "",
-				Value:    `{"denom": "usdx", "amount": "1000000"}`,
+
+				Value: `{"denom": "usdx", "amount": "1000000"}`,
 			},
 			expectContained: false,
 		},
@@ -193,8 +189,8 @@ func (suite *PermissionsTestSuite) TestAllowedParams_Contains() {
 			testParam: params.ParamChange{
 				Subspace: "cdp",
 				Key:      "DebtThreshold",
-				Subkey:   "",
-				Value:    `{"denom": "usdx", "amount": "1000000"}`,
+
+				Value: `{"denom": "usdx", "amount": "1000000"}`,
 			},
 			expectContained: false,
 		},
@@ -204,8 +200,8 @@ func (suite *PermissionsTestSuite) TestAllowedParams_Contains() {
 			testParam: params.ParamChange{
 				Subspace: "cdp",
 				Key:      "DebtThreshold",
-				Subkey:   "",
-				Value:    `{"denom": "usdx", "amount": "1000000"}`,
+
+				Value: `{"denom": "usdx", "amount": "1000000"}`,
 			},
 			expectContained: false,
 		},
@@ -256,13 +252,11 @@ func (suite *PermissionsTestSuite) TestTextPermission_Allows() {
 					{
 						Subspace: "cdp",
 						Key:      "DebtThreshold",
-						Subkey:   "",
 						Value:    `{"denom": "usdx", "amount": "1000000"}`,
 					},
 					{
 						Subspace: "cdp",
 						Key:      "CollateralParams",
-						Subkey:   "",
 						Value:    `[]`,
 					},
 				},
diff --git a/x/committee/types/proposal.go b/x/committee/types/proposal.go
index 45bfe0a4..95f073fa 100644
--- a/x/committee/types/proposal.go
+++ b/x/committee/types/proposal.go
@@ -3,7 +3,7 @@ package types
 import (
 	"gopkg.in/yaml.v2"
 
-	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 	govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
 )
 
@@ -48,12 +48,12 @@ func (ccp CommitteeChangeProposal) ProposalRoute() string { return RouterKey }
 func (ccp CommitteeChangeProposal) ProposalType() string { return ProposalTypeCommitteeChange }
 
 // ValidateBasic runs basic stateless validity checks
-func (ccp CommitteeChangeProposal) ValidateBasic() sdk.Error {
-	if err := govtypes.ValidateAbstract(DefaultCodespace, ccp); err != nil {
+func (ccp CommitteeChangeProposal) ValidateBasic() error {
+	if err := govtypes.ValidateAbstract(ccp); err != nil {
 		return err
 	}
 	if err := ccp.NewCommittee.Validate(); err != nil {
-		return ErrInvalidCommittee(DefaultCodespace, err.Error())
+		return sdkerrors.Wrap(ErrInvalidCommittee, err.Error())
 	}
 	return nil
 }
@@ -100,11 +100,8 @@ func (cdp CommitteeDeleteProposal) ProposalRoute() string { return RouterKey }
 func (cdp CommitteeDeleteProposal) ProposalType() string { return ProposalTypeCommitteeDelete }
 
 // ValidateBasic runs basic stateless validity checks
-func (cdp CommitteeDeleteProposal) ValidateBasic() sdk.Error {
-	if err := govtypes.ValidateAbstract(DefaultCodespace, cdp); err != nil {
-		return err
-	}
-	return nil
+func (cdp CommitteeDeleteProposal) ValidateBasic() error {
+	return govtypes.ValidateAbstract(cdp)
 }
 
 // String implements the Stringer interface.