diff --git a/abci/abci.go b/abci/abci.go
index 6bfde2d..167a198 100644
--- a/abci/abci.go
+++ b/abci/abci.go
@@ -13,7 +13,7 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkmempool "github.com/cosmos/cosmos-sdk/types/mempool"
 	"github.com/skip-mev/pob/mempool"
-	auctiontypes "github.com/skip-mev/pob/x/auction/types"
+	buildertypes "github.com/skip-mev/pob/x/builder/types"
 )
 
 type ProposalHandler struct {
@@ -67,7 +67,7 @@ func (h *ProposalHandler) PrepareProposalHandler() sdk.PrepareProposalHandler {
 
 			bidTxSize := int64(len(bidTxBz))
 			if bidTxSize <= req.MaxTxBytes {
-				bidMsg, ok := tmpBidTx.GetMsgs()[0].(*auctiontypes.MsgAuctionBid)
+				bidMsg, ok := tmpBidTx.GetMsgs()[0].(*buildertypes.MsgAuctionBid)
 				if !ok {
 					// This should never happen, as CheckTx will ensure only valid bids
 					// enter the mempool, but in case it does, we need to remove the
diff --git a/abci/abci_test.go b/abci/abci_test.go
index 929bff0..1fed3f2 100644
--- a/abci/abci_test.go
+++ b/abci/abci_test.go
@@ -15,9 +15,9 @@ import (
 	"github.com/skip-mev/pob/abci"
 	"github.com/skip-mev/pob/mempool"
 	testutils "github.com/skip-mev/pob/testutils"
-	"github.com/skip-mev/pob/x/auction/ante"
-	"github.com/skip-mev/pob/x/auction/keeper"
-	auctiontypes "github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/ante"
+	"github.com/skip-mev/pob/x/builder/keeper"
+	buildertypes "github.com/skip-mev/pob/x/builder/types"
 	"github.com/stretchr/testify/suite"
 )
 
@@ -35,13 +35,13 @@ type ABCITestSuite struct {
 	auctionBidAmount sdk.Coins
 	minBidIncrement  sdk.Coins
 
-	// auction setup
-	auctionKeeper    keeper.Keeper
+	// builder setup
+	builderKeeper    keeper.Keeper
 	bankKeeper       *testutils.MockBankKeeper
 	accountKeeper    *testutils.MockAccountKeeper
 	distrKeeper      *testutils.MockDistributionKeeper
 	stakingKeeper    *testutils.MockStakingKeeper
-	auctionDecorator ante.AuctionDecorator
+	builderDecorator ante.BuilderDecorator
 	key              *storetypes.KVStoreKey
 	authorityAccount sdk.AccAddress
 
@@ -60,7 +60,7 @@ func (suite *ABCITestSuite) SetupTest() {
 	// General config
 	suite.encodingConfig = testutils.CreateTestEncodingConfig()
 	suite.random = rand.New(rand.NewSource(time.Now().Unix()))
-	suite.key = storetypes.NewKVStoreKey(auctiontypes.StoreKey)
+	suite.key = storetypes.NewKVStoreKey(buildertypes.StoreKey)
 	testCtx := testutil.DefaultContextWithDB(suite.T(), suite.key, storetypes.NewTransientStoreKey("transient_test"))
 	suite.ctx = testCtx.Ctx
 
@@ -72,14 +72,14 @@ func (suite *ABCITestSuite) SetupTest() {
 	// Mock keepers set up
 	ctrl := gomock.NewController(suite.T())
 	suite.accountKeeper = testutils.NewMockAccountKeeper(ctrl)
-	suite.accountKeeper.EXPECT().GetModuleAddress(auctiontypes.ModuleName).Return(sdk.AccAddress{}).AnyTimes()
+	suite.accountKeeper.EXPECT().GetModuleAddress(buildertypes.ModuleName).Return(sdk.AccAddress{}).AnyTimes()
 	suite.bankKeeper = testutils.NewMockBankKeeper(ctrl)
 	suite.distrKeeper = testutils.NewMockDistributionKeeper(ctrl)
 	suite.stakingKeeper = testutils.NewMockStakingKeeper(ctrl)
 	suite.authorityAccount = sdk.AccAddress([]byte("authority"))
 
-	// Auction keeper / decorator set up
-	suite.auctionKeeper = keeper.NewKeeper(
+	// Builder keeper / decorator set up
+	suite.builderKeeper = keeper.NewKeeper(
 		suite.encodingConfig.Codec,
 		suite.key,
 		suite.accountKeeper,
@@ -88,9 +88,9 @@ func (suite *ABCITestSuite) SetupTest() {
 		suite.stakingKeeper,
 		suite.authorityAccount.String(),
 	)
-	err := suite.auctionKeeper.SetParams(suite.ctx, auctiontypes.DefaultParams())
+	err := suite.builderKeeper.SetParams(suite.ctx, buildertypes.DefaultParams())
 	suite.Require().NoError(err)
-	suite.auctionDecorator = ante.NewAuctionDecorator(suite.auctionKeeper, suite.encodingConfig.TxConfig.TxDecoder(), suite.encodingConfig.TxConfig.TxEncoder(), suite.mempool)
+	suite.builderDecorator = ante.NewBuilderDecorator(suite.builderKeeper, suite.encodingConfig.TxConfig.TxDecoder(), suite.encodingConfig.TxConfig.TxEncoder(), suite.mempool)
 
 	// Accounts set up
 	suite.accounts = testutils.RandomAccounts(suite.random, 1)
@@ -141,7 +141,7 @@ func (suite *ABCITestSuite) executeAnteHandler(tx sdk.Tx) (sdk.Context, error) {
 		return ctx, nil
 	}
 
-	return suite.auctionDecorator.AnteHandle(suite.ctx, tx, false, next)
+	return suite.builderDecorator.AnteHandle(suite.ctx, tx, false, next)
 }
 
 func (suite *ABCITestSuite) createFilledMempool(numNormalTxs, numAuctionTxs, numBundledTxs int, insertRefTxs bool) int {
@@ -241,7 +241,7 @@ func (suite *ABCITestSuite) exportMempool(exportRefTxs bool) [][]byte {
 		txs = append(txs, txBz)
 
 		if exportRefTxs {
-			for _, refRawTx := range auctionTx.GetMsgs()[0].(*auctiontypes.MsgAuctionBid).GetTransactions() {
+			for _, refRawTx := range auctionTx.GetMsgs()[0].(*buildertypes.MsgAuctionBid).GetTransactions() {
 				txs = append(txs, refRawTx)
 				seenTxs[string(refRawTx)] = true
 			}
@@ -483,15 +483,15 @@ func (suite *ABCITestSuite) TestPrepareProposal() {
 			suite.createFilledMempool(numNormalTxs, numAuctionTxs, numBundledTxs, insertRefTxs)
 
 			// create a new auction
-			params := auctiontypes.Params{
+			params := buildertypes.Params{
 				MaxBundleSize:          maxBundleSize,
 				ReserveFee:             reserveFee,
 				MinBuyInFee:            minBuyInFee,
 				FrontRunningProtection: frontRunningProtection,
 				MinBidIncrement:        suite.minBidIncrement,
 			}
-			suite.auctionKeeper.SetParams(suite.ctx, params)
-			suite.auctionDecorator = ante.NewAuctionDecorator(suite.auctionKeeper, suite.encodingConfig.TxConfig.TxDecoder(), suite.encodingConfig.TxConfig.TxEncoder(), suite.mempool)
+			suite.builderKeeper.SetParams(suite.ctx, params)
+			suite.builderDecorator = ante.NewBuilderDecorator(suite.builderKeeper, suite.encodingConfig.TxConfig.TxDecoder(), suite.encodingConfig.TxConfig.TxEncoder(), suite.mempool)
 
 			handler := suite.proposalHandler.PrepareProposalHandler()
 			res := handler(suite.ctx, abcitypes.RequestPrepareProposal{
@@ -731,15 +731,15 @@ func (suite *ABCITestSuite) TestProcessProposal() {
 			}
 
 			// create a new auction
-			params := auctiontypes.Params{
+			params := buildertypes.Params{
 				MaxBundleSize:          maxBundleSize,
 				ReserveFee:             reserveFee,
 				MinBuyInFee:            minBuyInFee,
 				FrontRunningProtection: frontRunningProtection,
 				MinBidIncrement:        suite.minBidIncrement,
 			}
-			suite.auctionKeeper.SetParams(suite.ctx, params)
-			suite.auctionDecorator = ante.NewAuctionDecorator(suite.auctionKeeper, suite.encodingConfig.TxConfig.TxDecoder(), suite.encodingConfig.TxConfig.TxEncoder(), suite.mempool)
+			suite.builderKeeper.SetParams(suite.ctx, params)
+			suite.builderDecorator = ante.NewBuilderDecorator(suite.builderKeeper, suite.encodingConfig.TxConfig.TxDecoder(), suite.encodingConfig.TxConfig.TxEncoder(), suite.mempool)
 			suite.Require().Equal(tc.isTopBidValid, suite.isTopBidValid())
 
 			txs := suite.exportMempool(exportRefTxs)
diff --git a/mempool/mempool_test.go b/mempool/mempool_test.go
index b91b409..6443fd2 100644
--- a/mempool/mempool_test.go
+++ b/mempool/mempool_test.go
@@ -10,7 +10,7 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/skip-mev/pob/mempool"
 	testutils "github.com/skip-mev/pob/testutils"
-	auctiontypes "github.com/skip-mev/pob/x/auction/types"
+	buildertypes "github.com/skip-mev/pob/x/builder/types"
 	"github.com/stretchr/testify/suite"
 )
 
@@ -158,7 +158,7 @@ func (suite *IntegrationTestSuite) TestAuctionMempoolSelect() {
 		tx := auctionIterator.Tx()
 		suite.Require().Len(tx.GetMsgs(), 1)
 
-		msgAuctionBid := tx.GetMsgs()[0].(*auctiontypes.MsgAuctionBid)
+		msgAuctionBid := tx.GetMsgs()[0].(*buildertypes.MsgAuctionBid)
 		if highestBid == nil {
 			highestBid = msgAuctionBid.Bid
 			prevBid = msgAuctionBid.Bid
diff --git a/mempool/tx.go b/mempool/tx.go
index f9328fb..fba2395 100644
--- a/mempool/tx.go
+++ b/mempool/tx.go
@@ -5,7 +5,7 @@ import (
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/x/auth/signing"
-	auctiontypes "github.com/skip-mev/pob/x/auction/types"
+	buildertypes "github.com/skip-mev/pob/x/builder/types"
 )
 
 // WrappedBidTx defines a wrapper around an sdk.Tx that contains a single
@@ -28,10 +28,10 @@ func (wbtx *WrappedBidTx) GetBid() sdk.Coins { return wbtx.bid }
 // GetMsgAuctionBidFromTx attempts to retrieve a MsgAuctionBid from an sdk.Tx if
 // one exists. If a MsgAuctionBid does exist and other messages are also present,
 // an error is returned. If no MsgAuctionBid is present, <nil, nil> is returned.
-func GetMsgAuctionBidFromTx(tx sdk.Tx) (*auctiontypes.MsgAuctionBid, error) {
-	auctionBidMsgs := make([]*auctiontypes.MsgAuctionBid, 0)
+func GetMsgAuctionBidFromTx(tx sdk.Tx) (*buildertypes.MsgAuctionBid, error) {
+	auctionBidMsgs := make([]*buildertypes.MsgAuctionBid, 0)
 	for _, msg := range tx.GetMsgs() {
-		t, ok := msg.(*auctiontypes.MsgAuctionBid)
+		t, ok := msg.(*buildertypes.MsgAuctionBid)
 		if ok {
 			auctionBidMsgs = append(auctionBidMsgs, t)
 		}
diff --git a/mempool/tx_test.go b/mempool/tx_test.go
index 0583d9e..1e1e848 100644
--- a/mempool/tx_test.go
+++ b/mempool/tx_test.go
@@ -7,7 +7,7 @@ import (
 	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
 	pobcodec "github.com/skip-mev/pob/codec"
 	"github.com/skip-mev/pob/mempool"
-	auctiontypes "github.com/skip-mev/pob/x/auction/types"
+	buildertypes "github.com/skip-mev/pob/x/builder/types"
 	"github.com/stretchr/testify/require"
 )
 
@@ -15,7 +15,7 @@ func TestGetMsgAuctionBidFromTx_Valid(t *testing.T) {
 	encCfg := pobcodec.CreateEncodingConfig()
 
 	txBuilder := encCfg.TxConfig.NewTxBuilder()
-	txBuilder.SetMsgs(&auctiontypes.MsgAuctionBid{})
+	txBuilder.SetMsgs(&buildertypes.MsgAuctionBid{})
 
 	msg, err := mempool.GetMsgAuctionBidFromTx(txBuilder.GetTx())
 	require.NoError(t, err)
@@ -27,8 +27,8 @@ func TestGetMsgAuctionBidFromTx_MultiMsgBid(t *testing.T) {
 
 	txBuilder := encCfg.TxConfig.NewTxBuilder()
 	txBuilder.SetMsgs(
-		&auctiontypes.MsgAuctionBid{},
-		&auctiontypes.MsgAuctionBid{},
+		&buildertypes.MsgAuctionBid{},
+		&buildertypes.MsgAuctionBid{},
 		&banktypes.MsgSend{},
 	)
 
@@ -52,7 +52,7 @@ func TestGetUnwrappedTx(t *testing.T) {
 	encCfg := pobcodec.CreateEncodingConfig()
 
 	txBuilder := encCfg.TxConfig.NewTxBuilder()
-	txBuilder.SetMsgs(&auctiontypes.MsgAuctionBid{})
+	txBuilder.SetMsgs(&buildertypes.MsgAuctionBid{})
 	tx := txBuilder.GetTx()
 
 	bid := sdk.NewCoins(sdk.NewCoin("foo", sdk.NewInt(1000000)))
diff --git a/proto/pob/auction/v1/genesis.proto b/proto/pob/builder/v1/genesis.proto
similarity index 86%
rename from proto/pob/auction/v1/genesis.proto
rename to proto/pob/builder/v1/genesis.proto
index 26ddfab..54c7132 100644
--- a/proto/pob/auction/v1/genesis.proto
+++ b/proto/pob/builder/v1/genesis.proto
@@ -1,20 +1,20 @@
 syntax = "proto3";
-package skipmev.pob.auction.v1;
+package skipmev.pob.builder.v1;
 
 import "gogoproto/gogo.proto";
 import "cosmos/base/v1beta1/coin.proto";
 import "amino/amino.proto";
 
-option go_package = "github.com/skip-mev/pob/x/auction/types";
+option go_package = "github.com/skip-mev/pob/x/builder/types";
 
-// GenesisState defines the genesis state of the x/auction module.
+// GenesisState defines the genesis state of the x/builder module.
 message GenesisState {
   Params params = 1 [(gogoproto.nullable) = false];
 }
 
-// Params defines the parameters of the x/auction module.
+// Params defines the parameters of the x/builder module.
 message Params {
-  option (amino.name) = "cosmos-sdk/x/auction/Params";
+  option (amino.name) = "cosmos-sdk/x/builder/Params";
 
   // max_bundle_size is the maximum number of transactions that can be bundled
   // in a single bundle.
diff --git a/proto/pob/auction/v1/query.proto b/proto/pob/builder/v1/query.proto
similarity index 63%
rename from proto/pob/auction/v1/query.proto
rename to proto/pob/builder/v1/query.proto
index 288898d..c5c22ab 100644
--- a/proto/pob/auction/v1/query.proto
+++ b/proto/pob/builder/v1/query.proto
@@ -1,20 +1,19 @@
 syntax = "proto3";
-package skipmev.pob.auction.v1;
+package skipmev.pob.builder.v1;
 
 import "gogoproto/gogo.proto";
 import "google/api/annotations.proto";
-import "cosmos_proto/cosmos.proto";
 import "cosmos/query/v1/query.proto";
-import "pob/auction/v1/genesis.proto";
+import "pob/builder/v1/genesis.proto";
 
-option go_package = "github.com/skip-mev/pob/x/auction/types";
+option go_package = "github.com/skip-mev/pob/x/builder/types";
 
-// Query defines the x/auction querier service.
+// Query defines the x/builder querier service.
 service Query {
-  // Params queries the parameters of the x/auction module.
+  // Params queries the parameters of the x/builder module.
   rpc Params(QueryParamsRequest) returns (QueryParamsResponse) {
     option (cosmos.query.v1.module_query_safe) = true;
-    option (google.api.http).get = "/pob/auction/v1/params";
+    option (google.api.http).get = "/pob/builder/v1/params";
   }
 }
 
diff --git a/proto/pob/auction/v1/tx.proto b/proto/pob/builder/v1/tx.proto
similarity index 75%
rename from proto/pob/auction/v1/tx.proto
rename to proto/pob/builder/v1/tx.proto
index eb5eabe..7a42dfd 100644
--- a/proto/pob/auction/v1/tx.proto
+++ b/proto/pob/builder/v1/tx.proto
@@ -1,35 +1,35 @@
 syntax = "proto3";
-package skipmev.pob.auction.v1;
+package skipmev.pob.builder.v1;
 
 import "gogoproto/gogo.proto";
 import "google/api/annotations.proto";
 import "cosmos/base/v1beta1/coin.proto";
-import "pob/auction/v1/genesis.proto";
+import "pob/builder/v1/genesis.proto";
 import "cosmos_proto/cosmos.proto";
 import "cosmos/msg/v1/msg.proto";
 import "amino/amino.proto";
 
-option go_package = "github.com/skip-mev/pob/x/auction/types";
+option go_package = "github.com/skip-mev/pob/x/builder/types";
 
-// Msg defines the x/auction Msg service.
+// Msg defines the x/builder Msg service.
 service Msg {
   option (cosmos.msg.v1.service) = true;
 
-  // AuctionBid defines a method for sending bids to the x/auction module.
+  // AuctionBid defines a method for sending bids to the x/builder module.
   rpc AuctionBid(MsgAuctionBid) returns (MsgAuctionBidResponse) {
-    option (google.api.http).post = "/pob/auction/v1/bid";
+    option (google.api.http).post = "/pob/builder/v1/bid";
   };
 
-  // UpdateParams defines a governance operation for updating the x/auction
+  // UpdateParams defines a governance operation for updating the x/builder
   // module parameters. The authority is hard-coded to the x/gov module account.
   rpc UpdateParams(MsgUpdateParams) returns (MsgUpdateParamsResponse);
 }
 
-// MsgAuctionBid defines a request type for sending bids to the x/auction
+// MsgAuctionBid defines a request type for sending bids to the x/builder
 // module.
 message MsgAuctionBid {
   option (cosmos.msg.v1.signer) = "bidder";
-  option (amino.name) = "pob/x/auction/MsgAuctionBid";
+  option (amino.name) = "pob/x/builder/MsgAuctionBid";
 
   option (gogoproto.equal) = false;
 
@@ -51,18 +51,18 @@ message MsgAuctionBid {
 // MsgAuctionBidResponse defines the Msg/AuctionBid response type.
 message MsgAuctionBidResponse {}
 
-// MsgUpdateParams defines a request type for updating the x/auction module
+// MsgUpdateParams defines a request type for updating the x/builder module
 // parameters.
 message MsgUpdateParams {
   option (cosmos.msg.v1.signer) = "authority";
-  option (amino.name) = "pob/x/auction/MsgUpdateParams";
+  option (amino.name) = "pob/x/builder/MsgUpdateParams";
 
   option (gogoproto.equal) = false;
 
   // authority is the address of the account that is authorized to update the
-  // x/auction module parameters.
+  // x/builder module parameters.
   string authority = 1 [ (cosmos_proto.scalar) = "cosmos.AddressString" ];
-  // params is the new parameters for the x/auction module.
+  // params is the new parameters for the x/builder module.
   Params params = 2 [ (gogoproto.nullable) = false ];
 }
 
diff --git a/testutils/utils.go b/testutils/utils.go
index d49c134..61609cf 100644
--- a/testutils/utils.go
+++ b/testutils/utils.go
@@ -15,7 +15,7 @@ import (
 	authsigning "github.com/cosmos/cosmos-sdk/x/auth/signing"
 	"github.com/cosmos/cosmos-sdk/x/auth/tx"
 	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
-	auctiontypes "github.com/skip-mev/pob/x/auction/types"
+	buildertypes "github.com/skip-mev/pob/x/builder/types"
 )
 
 type EncodingConfig struct {
@@ -31,7 +31,7 @@ func CreateTestEncodingConfig() EncodingConfig {
 
 	banktypes.RegisterInterfaces(interfaceRegistry)
 	cryptocodec.RegisterInterfaces(interfaceRegistry)
-	auctiontypes.RegisterInterfaces(interfaceRegistry)
+	buildertypes.RegisterInterfaces(interfaceRegistry)
 
 	codec := codec.NewProtoCodec(interfaceRegistry)
 
@@ -122,7 +122,7 @@ func CreateRandomTx(txCfg client.TxConfig, account Account, nonce, numberMsgs ui
 }
 
 func CreateAuctionTxWithSigners(txCfg client.TxConfig, bidder Account, bid sdk.Coins, nonce uint64, signers []Account) (authsigning.Tx, error) {
-	bidMsg := &auctiontypes.MsgAuctionBid{
+	bidMsg := &buildertypes.MsgAuctionBid{
 		Bidder:       bidder.Address.String(),
 		Bid:          bid,
 		Transactions: make([][]byte, len(signers)),
@@ -175,8 +175,8 @@ func CreateRandomMsgs(acc sdk.AccAddress, numberMsgs int) []sdk.Msg {
 	return msgs
 }
 
-func CreateMsgAuctionBid(txCfg client.TxConfig, bidder Account, bid sdk.Coins, nonce uint64, numberMsgs int) (*auctiontypes.MsgAuctionBid, error) {
-	bidMsg := &auctiontypes.MsgAuctionBid{
+func CreateMsgAuctionBid(txCfg client.TxConfig, bidder Account, bid sdk.Coins, nonce uint64, numberMsgs int) (*buildertypes.MsgAuctionBid, error) {
+	bidMsg := &buildertypes.MsgAuctionBid{
 		Bidder:       bidder.Address.String(),
 		Bid:          bid,
 		Transactions: make([][]byte, numberMsgs),
diff --git a/x/auction/types/keys.go b/x/auction/types/keys.go
deleted file mode 100644
index bdc9ccc..0000000
--- a/x/auction/types/keys.go
+++ /dev/null
@@ -1,22 +0,0 @@
-package types
-
-const (
-	// ModuleName is the name of the auction module
-	ModuleName = "auction"
-
-	// StoreKey is the default store key for the auction module
-	StoreKey = ModuleName
-
-	// RouterKey is the message route for the auction module
-	RouterKey = ModuleName
-
-	// QuerierRoute is the querier route for the auction module
-	QuerierRoute = ModuleName
-)
-
-const (
-	prefixParams = iota + 1
-)
-
-// KeyParams is the store key for the auction module's parameters.
-var KeyParams = []byte{prefixParams}
diff --git a/x/auction/ante/ante.go b/x/builder/ante/ante.go
similarity index 80%
rename from x/auction/ante/ante.go
rename to x/builder/ante/ante.go
index 575cbf5..93b364c 100644
--- a/x/auction/ante/ante.go
+++ b/x/builder/ante/ante.go
@@ -6,21 +6,21 @@ import (
 	"cosmossdk.io/errors"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/skip-mev/pob/mempool"
-	"github.com/skip-mev/pob/x/auction/keeper"
+	"github.com/skip-mev/pob/x/builder/keeper"
 )
 
-var _ sdk.AnteDecorator = AuctionDecorator{}
+var _ sdk.AnteDecorator = BuilderDecorator{}
 
-type AuctionDecorator struct {
-	auctionKeeper keeper.Keeper
+type BuilderDecorator struct {
+	builderKeeper keeper.Keeper
 	txDecoder     sdk.TxDecoder
 	txEncoder     sdk.TxEncoder
 	mempool       *mempool.AuctionMempool
 }
 
-func NewAuctionDecorator(ak keeper.Keeper, txDecoder sdk.TxDecoder, txEncoder sdk.TxEncoder, mempool *mempool.AuctionMempool) AuctionDecorator {
-	return AuctionDecorator{
-		auctionKeeper: ak,
+func NewBuilderDecorator(ak keeper.Keeper, txDecoder sdk.TxDecoder, txEncoder sdk.TxEncoder, mempool *mempool.AuctionMempool) BuilderDecorator {
+	return BuilderDecorator{
+		builderKeeper: ak,
 		txDecoder:     txDecoder,
 		txEncoder:     txEncoder,
 		mempool:       mempool,
@@ -29,7 +29,7 @@ func NewAuctionDecorator(ak keeper.Keeper, txDecoder sdk.TxDecoder, txEncoder sd
 
 // AnteHandle validates that the auction bid is valid if one exists. If valid it will deduct the entrance fee from the
 // bidder's account.
-func (ad AuctionDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error) {
+func (ad BuilderDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error) {
 	auctionMsg, err := mempool.GetMsgAuctionBidFromTx(tx)
 	if err != nil {
 		return ctx, err
@@ -68,7 +68,7 @@ func (ad AuctionDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool,
 			}
 		}
 
-		if err := ad.auctionKeeper.ValidateAuctionMsg(ctx, bidder, auctionMsg.Bid, topBid, transactions); err != nil {
+		if err := ad.builderKeeper.ValidateAuctionMsg(ctx, bidder, auctionMsg.Bid, topBid, transactions); err != nil {
 			return ctx, errors.Wrap(err, "failed to validate auction bid")
 		}
 	}
@@ -77,7 +77,7 @@ func (ad AuctionDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool,
 }
 
 // GetTopAuctionBid returns the highest auction bid if one exists.
-func (ad AuctionDecorator) GetTopAuctionBid(ctx sdk.Context) (sdk.Coins, error) {
+func (ad BuilderDecorator) GetTopAuctionBid(ctx sdk.Context) (sdk.Coins, error) {
 	auctionTx := ad.mempool.GetTopAuctionTx(ctx)
 	if auctionTx == nil {
 		return sdk.NewCoins(), nil
@@ -87,7 +87,7 @@ func (ad AuctionDecorator) GetTopAuctionBid(ctx sdk.Context) (sdk.Coins, error)
 }
 
 // IsTopBidTx returns true if the transaction inputted is the highest bidding auction transaction in the mempool.
-func (ad AuctionDecorator) IsTopBidTx(ctx sdk.Context, tx sdk.Tx) (bool, error) {
+func (ad BuilderDecorator) IsTopBidTx(ctx sdk.Context, tx sdk.Tx) (bool, error) {
 	auctionTx := ad.mempool.GetTopAuctionTx(ctx)
 	if auctionTx == nil {
 		return false, nil
diff --git a/x/auction/ante/ante_test.go b/x/builder/ante/ante_test.go
similarity index 91%
rename from x/auction/ante/ante_test.go
rename to x/builder/ante/ante_test.go
index 4f476d9..25dd71e 100644
--- a/x/auction/ante/ante_test.go
+++ b/x/builder/ante/ante_test.go
@@ -11,9 +11,9 @@ import (
 	"github.com/golang/mock/gomock"
 	"github.com/skip-mev/pob/mempool"
 	testutils "github.com/skip-mev/pob/testutils"
-	"github.com/skip-mev/pob/x/auction/ante"
-	"github.com/skip-mev/pob/x/auction/keeper"
-	auctiontypes "github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/ante"
+	"github.com/skip-mev/pob/x/builder/keeper"
+	buildertypes "github.com/skip-mev/pob/x/builder/types"
 	"github.com/stretchr/testify/suite"
 )
 
@@ -25,13 +25,13 @@ type AnteTestSuite struct {
 	encodingConfig testutils.EncodingConfig
 	random         *rand.Rand
 
-	// auction setup
-	auctionKeeper    keeper.Keeper
+	// builder setup
+	builderKeeper    keeper.Keeper
 	bankKeeper       *testutils.MockBankKeeper
 	accountKeeper    *testutils.MockAccountKeeper
 	distrKeeper      *testutils.MockDistributionKeeper
 	stakingKeeper    *testutils.MockStakingKeeper
-	auctionDecorator ante.AuctionDecorator
+	builderDecorator ante.BuilderDecorator
 	key              *storetypes.KVStoreKey
 	authorityAccount sdk.AccAddress
 }
@@ -44,19 +44,19 @@ func (suite *AnteTestSuite) SetupTest() {
 	// General config
 	suite.encodingConfig = testutils.CreateTestEncodingConfig()
 	suite.random = rand.New(rand.NewSource(time.Now().Unix()))
-	suite.key = storetypes.NewKVStoreKey(auctiontypes.StoreKey)
+	suite.key = storetypes.NewKVStoreKey(buildertypes.StoreKey)
 	testCtx := testutil.DefaultContextWithDB(suite.T(), suite.key, storetypes.NewTransientStoreKey("transient_test"))
 	suite.ctx = testCtx.Ctx
 
 	// Keepers set up
 	ctrl := gomock.NewController(suite.T())
 	suite.accountKeeper = testutils.NewMockAccountKeeper(ctrl)
-	suite.accountKeeper.EXPECT().GetModuleAddress(auctiontypes.ModuleName).Return(sdk.AccAddress{}).AnyTimes()
+	suite.accountKeeper.EXPECT().GetModuleAddress(buildertypes.ModuleName).Return(sdk.AccAddress{}).AnyTimes()
 	suite.bankKeeper = testutils.NewMockBankKeeper(ctrl)
 	suite.distrKeeper = testutils.NewMockDistributionKeeper(ctrl)
 	suite.stakingKeeper = testutils.NewMockStakingKeeper(ctrl)
 	suite.authorityAccount = sdk.AccAddress([]byte("authority"))
-	suite.auctionKeeper = keeper.NewKeeper(
+	suite.builderKeeper = keeper.NewKeeper(
 		suite.encodingConfig.Codec,
 		suite.key,
 		suite.accountKeeper,
@@ -65,7 +65,7 @@ func (suite *AnteTestSuite) SetupTest() {
 		suite.stakingKeeper,
 		suite.authorityAccount.String(),
 	)
-	err := suite.auctionKeeper.SetParams(suite.ctx, auctiontypes.DefaultParams())
+	err := suite.builderKeeper.SetParams(suite.ctx, buildertypes.DefaultParams())
 	suite.Require().NoError(err)
 }
 
@@ -77,7 +77,7 @@ func (suite *AnteTestSuite) executeAnteHandler(tx sdk.Tx, balance sdk.Coins) (sd
 		return ctx, nil
 	}
 
-	return suite.auctionDecorator.AnteHandle(suite.ctx, tx, false, next)
+	return suite.builderDecorator.AnteHandle(suite.ctx, tx, false, next)
 }
 
 func (suite *AnteTestSuite) TestAnteHandler() {
@@ -225,7 +225,7 @@ func (suite *AnteTestSuite) TestAnteHandler() {
 			tc.malleate()
 
 			// Set the auction params
-			err := suite.auctionKeeper.SetParams(suite.ctx, auctiontypes.Params{
+			err := suite.builderKeeper.SetParams(suite.ctx, buildertypes.Params{
 				MaxBundleSize:          maxBundleSize,
 				ReserveFee:             reserveFee,
 				MinBuyInFee:            minBuyInFee,
@@ -251,7 +251,7 @@ func (suite *AnteTestSuite) TestAnteHandler() {
 			suite.Require().NoError(err)
 
 			// Execute the ante handler
-			suite.auctionDecorator = ante.NewAuctionDecorator(suite.auctionKeeper, suite.encodingConfig.TxConfig.TxDecoder(), suite.encodingConfig.TxConfig.TxEncoder(), mempool)
+			suite.builderDecorator = ante.NewBuilderDecorator(suite.builderKeeper, suite.encodingConfig.TxConfig.TxDecoder(), suite.encodingConfig.TxConfig.TxEncoder(), mempool)
 			_, err = suite.executeAnteHandler(auctionTx, balance)
 			if tc.pass {
 				suite.Require().NoError(err)
diff --git a/x/auction/keeper/auction.go b/x/builder/keeper/auction.go
similarity index 100%
rename from x/auction/keeper/auction.go
rename to x/builder/keeper/auction.go
diff --git a/x/auction/keeper/auction_test.go b/x/builder/keeper/auction_test.go
similarity index 94%
rename from x/auction/keeper/auction_test.go
rename to x/builder/keeper/auction_test.go
index c53e275..bd7d5a1 100644
--- a/x/auction/keeper/auction_test.go
+++ b/x/builder/keeper/auction_test.go
@@ -6,8 +6,8 @@ import (
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	testutils "github.com/skip-mev/pob/testutils"
-	"github.com/skip-mev/pob/x/auction/keeper"
-	auctiontypes "github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/keeper"
+	buildertypes "github.com/skip-mev/pob/x/builder/types"
 )
 
 func (suite *KeeperTestSuite) TestValidateAuctionMsg() {
@@ -149,11 +149,11 @@ func (suite *KeeperTestSuite) TestValidateAuctionMsg() {
 
 			tc.malleate()
 
-			// Set up the new auction keeper with mocks customized for this test case
+			// Set up the new builder keeper with mocks customized for this test case
 			suite.bankKeeper.EXPECT().GetAllBalances(suite.ctx, bidder.Address).Return(balance).AnyTimes()
 			suite.bankKeeper.EXPECT().SendCoins(suite.ctx, bidder.Address, escrowAddress, reserveFee).Return(nil).AnyTimes()
 
-			suite.auctionKeeper = keeper.NewKeeper(
+			suite.builderKeeper = keeper.NewKeeper(
 				suite.encCfg.Codec,
 				suite.key,
 				suite.accountKeeper,
@@ -162,7 +162,7 @@ func (suite *KeeperTestSuite) TestValidateAuctionMsg() {
 				suite.stakingKeeper,
 				suite.authorityAccount.String(),
 			)
-			params := auctiontypes.Params{
+			params := buildertypes.Params{
 				MaxBundleSize:          maxBundleSize,
 				ReserveFee:             reserveFee,
 				MinBuyInFee:            minBuyInFee,
@@ -170,7 +170,7 @@ func (suite *KeeperTestSuite) TestValidateAuctionMsg() {
 				FrontRunningProtection: frontRunningProtection,
 				MinBidIncrement:        minBidIncrement,
 			}
-			suite.auctionKeeper.SetParams(suite.ctx, params)
+			suite.builderKeeper.SetParams(suite.ctx, params)
 
 			// Create the bundle of transactions ordered by accounts
 			bundle := make([]sdk.Tx, 0)
@@ -180,7 +180,7 @@ func (suite *KeeperTestSuite) TestValidateAuctionMsg() {
 				bundle = append(bundle, tx)
 			}
 
-			err := suite.auctionKeeper.ValidateAuctionMsg(suite.ctx, bidder.Address, bid, highestBid, bundle)
+			err := suite.builderKeeper.ValidateAuctionMsg(suite.ctx, bidder.Address, bid, highestBid, bundle)
 			if tc.pass {
 				suite.Require().NoError(err)
 			} else {
@@ -291,7 +291,7 @@ func (suite *KeeperTestSuite) TestValidateBundle() {
 			}
 
 			// Validate the bundle
-			err := suite.auctionKeeper.ValidateAuctionBundle(bidder.Address, bundle)
+			err := suite.builderKeeper.ValidateAuctionBundle(bidder.Address, bundle)
 			if tc.pass {
 				suite.Require().NoError(err)
 			} else {
diff --git a/x/auction/keeper/genesis.go b/x/builder/keeper/genesis.go
similarity index 71%
rename from x/auction/keeper/genesis.go
rename to x/builder/keeper/genesis.go
index d0d66b6..40a38b3 100644
--- a/x/auction/keeper/genesis.go
+++ b/x/builder/keeper/genesis.go
@@ -2,12 +2,12 @@ package keeper
 
 import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/types"
 )
 
-// InitGenesis initializes the auction module's state from a given genesis state.
+// InitGenesis initializes the builder module's state from a given genesis state.
 func (k Keeper) InitGenesis(ctx sdk.Context, gs types.GenesisState) {
-	// Set the auction module's parameters.
+	// Set the builder module's parameters.
 	if err := k.SetParams(ctx, gs.Params); err != nil {
 		panic(err)
 	}
@@ -15,7 +15,7 @@ func (k Keeper) InitGenesis(ctx sdk.Context, gs types.GenesisState) {
 
 // ExportGenesis returns a GenesisState for a given context.
 func (k Keeper) ExportGenesis(ctx sdk.Context) *types.GenesisState {
-	// Get the auction module's parameters.
+	// Get the builder module's parameters.
 	params, err := k.GetParams(ctx)
 	if err != nil {
 		panic(err)
diff --git a/x/auction/keeper/grpc_query.go b/x/builder/keeper/grpc_query.go
similarity index 69%
rename from x/auction/keeper/grpc_query.go
rename to x/builder/keeper/grpc_query.go
index 8674452..272ff74 100644
--- a/x/auction/keeper/grpc_query.go
+++ b/x/builder/keeper/grpc_query.go
@@ -4,22 +4,22 @@ import (
 	"context"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/types"
 )
 
 var _ types.QueryServer = QueryServer{}
 
-// QueryServer defines the auction module's gRPC querier service.
+// QueryServer defines the builder module's gRPC querier service.
 type QueryServer struct {
 	keeper Keeper
 }
 
-// NewQueryServer creates a new gRPC query server for the auction module.
+// NewQueryServer creates a new gRPC query server for the builder module.
 func NewQueryServer(keeper Keeper) *QueryServer {
 	return &QueryServer{keeper: keeper}
 }
 
-// Params queries all parameters of the auction module.
+// Params queries all parameters of the builder module.
 func (q QueryServer) Params(c context.Context, _ *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
 	ctx := sdk.UnwrapSDKContext(c)
 
diff --git a/x/auction/keeper/keeper.go b/x/builder/keeper/keeper.go
similarity index 86%
rename from x/auction/keeper/keeper.go
rename to x/builder/keeper/keeper.go
index 9cd5fca..a93fcb0 100644
--- a/x/auction/keeper/keeper.go
+++ b/x/builder/keeper/keeper.go
@@ -8,7 +8,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/codec"
 	storetypes "github.com/cosmos/cosmos-sdk/store/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/types"
 )
 
 type Keeper struct {
@@ -38,9 +38,9 @@ func NewKeeper(
 		panic(err)
 	}
 
-	// Ensure that the auction module account exists.
+	// Ensure that the builder module account exists.
 	if accountKeeper.GetModuleAddress(types.ModuleName) == nil {
-		panic("auction module account has not been set")
+		panic("builder module account has not been set")
 	}
 
 	return Keeper{
@@ -53,7 +53,7 @@ func NewKeeper(
 	}
 }
 
-// Logger returns an auction module-specific logger.
+// Logger returns a builder module-specific logger.
 func (k Keeper) Logger(ctx sdk.Context) log.Logger {
 	return ctx.Logger().With("module", "x/"+types.ModuleName)
 }
@@ -63,7 +63,7 @@ func (k Keeper) GetAuthority() string {
 	return k.authority
 }
 
-// GetParams returns the auction module's parameters.
+// GetParams returns the builder module's parameters.
 func (k Keeper) GetParams(ctx sdk.Context) (types.Params, error) {
 	store := ctx.KVStore(k.storeKey)
 
@@ -71,7 +71,7 @@ func (k Keeper) GetParams(ctx sdk.Context) (types.Params, error) {
 	bz := store.Get(key)
 
 	if len(bz) == 0 {
-		return types.Params{}, fmt.Errorf("no params found for the auction module")
+		return types.Params{}, fmt.Errorf("no params found for the builder module")
 	}
 
 	params := types.Params{}
@@ -82,7 +82,7 @@ func (k Keeper) GetParams(ctx sdk.Context) (types.Params, error) {
 	return params, nil
 }
 
-// SetParams sets the auction module's parameters.
+// SetParams sets the builder module's parameters.
 func (k Keeper) SetParams(ctx sdk.Context, params types.Params) error {
 	store := ctx.KVStore(k.storeKey)
 
@@ -106,7 +106,7 @@ func (k Keeper) GetMaxBundleSize(ctx sdk.Context) (uint32, error) {
 	return params.MaxBundleSize, nil
 }
 
-// GetEscrowAccount returns the auction module's escrow account.
+// GetEscrowAccount returns the builder module's escrow account.
 func (k Keeper) GetEscrowAccount(ctx sdk.Context) (sdk.AccAddress, error) {
 	params, err := k.GetParams(ctx)
 	if err != nil {
@@ -121,7 +121,7 @@ func (k Keeper) GetEscrowAccount(ctx sdk.Context) (sdk.AccAddress, error) {
 	return account, nil
 }
 
-// GetReserveFee returns the reserve fee of the auction module.
+// GetReserveFee returns the reserve fee of the builder module.
 func (k Keeper) GetReserveFee(ctx sdk.Context) (sdk.Coins, error) {
 	params, err := k.GetParams(ctx)
 	if err != nil {
@@ -131,7 +131,7 @@ func (k Keeper) GetReserveFee(ctx sdk.Context) (sdk.Coins, error) {
 	return params.ReserveFee, nil
 }
 
-// GetMinBuyInFee returns the fee that the bidder must pay to enter the auction.
+// GetMinBuyInFee returns the fee that the bidder must pay to enter the builder.
 func (k Keeper) GetMinBuyInFee(ctx sdk.Context) (sdk.Coins, error) {
 	params, err := k.GetParams(ctx)
 	if err != nil {
@@ -141,7 +141,7 @@ func (k Keeper) GetMinBuyInFee(ctx sdk.Context) (sdk.Coins, error) {
 	return params.MinBuyInFee, nil
 }
 
-// GetMinBidIncrement returns the minimum bid increment for the auction.
+// GetMinBidIncrement returns the minimum bid increment for the builder.
 func (k Keeper) GetMinBidIncrement(ctx sdk.Context) (sdk.Coins, error) {
 	params, err := k.GetParams(ctx)
 	if err != nil {
@@ -151,7 +151,7 @@ func (k Keeper) GetMinBidIncrement(ctx sdk.Context) (sdk.Coins, error) {
 	return params.MinBidIncrement, nil
 }
 
-// GetProposerFee returns the proposer fee for the auction module.
+// GetProposerFee returns the proposer fee for the builder module.
 func (k Keeper) GetProposerFee(ctx sdk.Context) (sdk.Dec, error) {
 	params, err := k.GetParams(ctx)
 	if err != nil {
diff --git a/x/auction/keeper/keeper_test.go b/x/builder/keeper/keeper_test.go
similarity index 86%
rename from x/auction/keeper/keeper_test.go
rename to x/builder/keeper/keeper_test.go
index 26b294b..3c168fb 100644
--- a/x/auction/keeper/keeper_test.go
+++ b/x/builder/keeper/keeper_test.go
@@ -9,8 +9,8 @@ import (
 	"github.com/golang/mock/gomock"
 	"github.com/skip-mev/pob/mempool"
 	testutils "github.com/skip-mev/pob/testutils"
-	"github.com/skip-mev/pob/x/auction/keeper"
-	"github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/keeper"
+	"github.com/skip-mev/pob/x/builder/types"
 
 	"github.com/stretchr/testify/suite"
 )
@@ -18,7 +18,7 @@ import (
 type KeeperTestSuite struct {
 	suite.Suite
 
-	auctionKeeper    keeper.Keeper
+	builderKeeper    keeper.Keeper
 	bankKeeper       *testutils.MockBankKeeper
 	accountKeeper    *testutils.MockAccountKeeper
 	distrKeeper      *testutils.MockDistributionKeeper
@@ -51,7 +51,7 @@ func (suite *KeeperTestSuite) SetupTest() {
 	suite.distrKeeper = testutils.NewMockDistributionKeeper(ctrl)
 	suite.stakingKeeper = testutils.NewMockStakingKeeper(ctrl)
 	suite.authorityAccount = sdk.AccAddress([]byte("authority"))
-	suite.auctionKeeper = keeper.NewKeeper(
+	suite.builderKeeper = keeper.NewKeeper(
 		suite.encCfg.Codec,
 		suite.key,
 		suite.accountKeeper,
@@ -61,9 +61,9 @@ func (suite *KeeperTestSuite) SetupTest() {
 		suite.authorityAccount.String(),
 	)
 
-	err := suite.auctionKeeper.SetParams(suite.ctx, types.DefaultParams())
+	err := suite.builderKeeper.SetParams(suite.ctx, types.DefaultParams())
 	suite.Require().NoError(err)
 
 	suite.mempool = mempool.NewAuctionMempool(suite.encCfg.TxConfig.TxDecoder(), 0)
-	suite.msgServer = keeper.NewMsgServerImpl(suite.auctionKeeper)
+	suite.msgServer = keeper.NewMsgServerImpl(suite.builderKeeper)
 }
diff --git a/x/auction/keeper/msg_server.go b/x/builder/keeper/msg_server.go
similarity index 94%
rename from x/auction/keeper/msg_server.go
rename to x/builder/keeper/msg_server.go
index ac8b9da..f07d6f2 100644
--- a/x/auction/keeper/msg_server.go
+++ b/x/builder/keeper/msg_server.go
@@ -5,17 +5,17 @@ import (
 	"fmt"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/types"
 )
 
 var _ types.MsgServer = MsgServer{}
 
-// MsgServer is the wrapper for the auction module's msg service.
+// MsgServer is the wrapper for the builder module's msg service.
 type MsgServer struct {
 	Keeper
 }
 
-// NewMsgServerImpl returns an implementation of the auction MsgServer interface.
+// NewMsgServerImpl returns an implementation of the builder MsgServer interface.
 func NewMsgServerImpl(keeper Keeper) *MsgServer {
 	return &MsgServer{Keeper: keeper}
 }
diff --git a/x/auction/keeper/msg_server_test.go b/x/builder/keeper/msg_server_test.go
similarity index 93%
rename from x/auction/keeper/msg_server_test.go
rename to x/builder/keeper/msg_server_test.go
index 9257926..00625df 100644
--- a/x/auction/keeper/msg_server_test.go
+++ b/x/builder/keeper/msg_server_test.go
@@ -7,7 +7,7 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
 	testutils "github.com/skip-mev/pob/testutils"
-	"github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/types"
 )
 
 func (suite *KeeperTestSuite) TestMsgAuctionBid() {
@@ -46,7 +46,7 @@ func (suite *KeeperTestSuite) TestMsgAuctionBid() {
 			malleate: func() {
 				params := types.DefaultParams()
 				params.MaxBundleSize = 2
-				suite.auctionKeeper.SetParams(suite.ctx, params)
+				suite.builderKeeper.SetParams(suite.ctx, params)
 			},
 			expectErr: true,
 		},
@@ -61,7 +61,7 @@ func (suite *KeeperTestSuite) TestMsgAuctionBid() {
 				params := types.DefaultParams()
 				params.ProposerFee = sdk.ZeroDec()
 				params.EscrowAccountAddress = escrow.Address.String()
-				suite.auctionKeeper.SetParams(suite.ctx, params)
+				suite.builderKeeper.SetParams(suite.ctx, params)
 
 				suite.bankKeeper.EXPECT().
 					SendCoins(
@@ -86,7 +86,7 @@ func (suite *KeeperTestSuite) TestMsgAuctionBid() {
 				params := types.DefaultParams()
 				params.ProposerFee = sdk.MustNewDecFromStr("0.30")
 				params.EscrowAccountAddress = escrow.Address.String()
-				suite.auctionKeeper.SetParams(suite.ctx, params)
+				suite.builderKeeper.SetParams(suite.ctx, params)
 
 				suite.distrKeeper.EXPECT().
 					GetPreviousProposerConsAddr(suite.ctx).
diff --git a/x/auction/module.go b/x/builder/module.go
similarity index 83%
rename from x/auction/module.go
rename to x/builder/module.go
index 791ee11..09c5c13 100644
--- a/x/auction/module.go
+++ b/x/builder/module.go
@@ -1,4 +1,4 @@
-package auction
+package builder
 
 import (
 	"context"
@@ -13,8 +13,8 @@ import (
 	"github.com/cosmos/cosmos-sdk/types/module"
 	"github.com/gorilla/mux"
 	"github.com/grpc-ecosystem/grpc-gateway/runtime"
-	"github.com/skip-mev/pob/x/auction/keeper"
-	"github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/keeper"
+	"github.com/skip-mev/pob/x/builder/types"
 	"github.com/spf13/cobra"
 )
 
@@ -23,35 +23,35 @@ var (
 	_ module.AppModuleBasic = AppModuleBasic{}
 )
 
-// ConsensusVersion defines the current x/auction module consensus version.
+// ConsensusVersion defines the current x/builder module consensus version.
 const ConsensusVersion = 1
 
-// AppModuleBasic defines the basic application module used by the auction module.
+// AppModuleBasic defines the basic application module used by the builder module.
 type AppModuleBasic struct {
 	cdc codec.Codec
 }
 
-// Name returns the auction module's name.
+// Name returns the builder module's name.
 func (AppModuleBasic) Name() string {
 	return types.ModuleName
 }
 
-// RegisterLegacyAminoCodec registers the auction module's types on the given LegacyAmino codec.
+// RegisterLegacyAminoCodec registers the builder module's types on the given LegacyAmino codec.
 func (AppModuleBasic) RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
 	types.RegisterLegacyAminoCodec(cdc)
 }
 
-// RegisterInterfaces registers the auction module's interface types.
+// RegisterInterfaces registers the builder module's interface types.
 func (AppModuleBasic) RegisterInterfaces(registry cdctypes.InterfaceRegistry) {
 	types.RegisterInterfaces(registry)
 }
 
-// DefaultGenesis returns default genesis state as raw bytes for the auction module.
+// DefaultGenesis returns default genesis state as raw bytes for the builder module.
 func (AppModuleBasic) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage {
 	return cdc.MustMarshalJSON(types.DefaultGenesisState())
 }
 
-// ValidateGenesis performs genesis state validation for the auction module.
+// ValidateGenesis performs genesis state validation for the builder module.
 func (AppModuleBasic) ValidateGenesis(cdc codec.JSONCodec, _ client.TxEncodingConfig, bz json.RawMessage) error {
 	var genState types.GenesisState
 	if err := cdc.UnmarshalJSON(bz, &genState); err != nil {
@@ -61,17 +61,17 @@ func (AppModuleBasic) ValidateGenesis(cdc codec.JSONCodec, _ client.TxEncodingCo
 	return genState.Validate()
 }
 
-// RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the auction module.
+// RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the builder module.
 func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
 	if err := types.RegisterQueryHandlerClient(context.Background(), mux, types.NewQueryClient(clientCtx)); err != nil {
 		panic(err)
 	}
 }
 
-// GetTxCmd returns the root tx command for the auction module.
+// GetTxCmd returns the root tx command for the builder module.
 func (AppModuleBasic) GetTxCmd() *cobra.Command { return nil }
 
-// GetQueryCmd returns no root query command for the auction module.
+// GetQueryCmd returns no root query command for the builder module.
 func (AppModuleBasic) GetQueryCmd() *cobra.Command { return nil }
 
 type AppModule struct {
@@ -91,7 +91,7 @@ func NewAppModule(cdc codec.Codec, keeper keeper.Keeper) AppModule {
 // ConsensusVersion implements AppModule/ConsensusVersion.
 func (AppModule) ConsensusVersion() uint64 { return ConsensusVersion }
 
-// RegisterServices registers a the gRPC Query and Msg services for the x/auction
+// RegisterServices registers a the gRPC Query and Msg services for the x/builder
 // module.
 func (am AppModule) RegisterServices(cfc module.Configurator) {
 	types.RegisterMsgServer(cfc.MsgServer(), keeper.NewMsgServerImpl(am.keeper))
@@ -105,7 +105,7 @@ func (a AppModuleBasic) RegisterRESTRoutes(_ client.Context, _ *mux.Router) {}
 // logic (most often the chain will be halted).
 func (am AppModule) RegisterInvariants(_ sdk.InvariantRegistry) {}
 
-// InitGenesis performs the module's genesis initialization for the auction
+// InitGenesis performs the module's genesis initialization for the builder
 // module. It returns no validator updates.
 func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, gs json.RawMessage) []abci.ValidatorUpdate {
 	var genState types.GenesisState
@@ -115,7 +115,7 @@ func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, gs json.Ra
 	return []abci.ValidatorUpdate{}
 }
 
-// ExportGenesis returns the auction module's exported genesis state as raw
+// ExportGenesis returns the builder module's exported genesis state as raw
 // JSON bytes.
 func (am AppModule) ExportGenesis(ctx sdk.Context, cdc codec.JSONCodec) json.RawMessage {
 	genState := am.keeper.ExportGenesis(ctx)
diff --git a/x/auction/types/codec.go b/x/builder/types/codec.go
similarity index 80%
rename from x/auction/types/codec.go
rename to x/builder/types/codec.go
index 871831c..fe9f750 100644
--- a/x/auction/types/codec.go
+++ b/x/builder/types/codec.go
@@ -30,17 +30,17 @@ func init() {
 	RegisterLegacyAminoCodec(groupcodec.Amino)
 }
 
-// RegisterLegacyAminoCodec registers the necessary x/auction interfaces and
+// RegisterLegacyAminoCodec registers the necessary x/builder interfaces and
 // concrete types on the provided LegacyAmino codec. These types are used for
 // Amino JSON serialization.
 func RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
-	legacy.RegisterAminoMsg(cdc, &MsgAuctionBid{}, "skip-mev/pob/MsgAuctionBid")
-	legacy.RegisterAminoMsg(cdc, &MsgUpdateParams{}, "skip-mev/pob/MsgUpdateParams")
+	legacy.RegisterAminoMsg(cdc, &MsgAuctionBid{}, "pob/x/builder/MsgAuctionBid")
+	legacy.RegisterAminoMsg(cdc, &MsgUpdateParams{}, "pob/x/builder/MsgUpdateParams")
 
-	cdc.RegisterConcrete(Params{}, "skip-mev/pob/Params", nil)
+	cdc.RegisterConcrete(Params{}, "pob/builder/Params", nil)
 }
 
-// RegisterInterfaces registers the x/auction interfaces types with the
+// RegisterInterfaces registers the x/builder interfaces types with the
 // interface registry.
 func RegisterInterfaces(registry types.InterfaceRegistry) {
 	registry.RegisterImplementations(
diff --git a/x/auction/types/expected_keepers.go b/x/builder/types/expected_keepers.go
similarity index 100%
rename from x/auction/types/expected_keepers.go
rename to x/builder/types/expected_keepers.go
diff --git a/x/auction/types/genesis.go b/x/builder/types/genesis.go
similarity index 86%
rename from x/auction/types/genesis.go
rename to x/builder/types/genesis.go
index 274da8c..56f3f24 100644
--- a/x/auction/types/genesis.go
+++ b/x/builder/types/genesis.go
@@ -14,7 +14,7 @@ func DefaultGenesisState() *GenesisState {
 	}
 }
 
-// Validate performs basic validation of the auction module genesis state.
+// Validate performs basic validation of the builder module genesis state.
 func (gs GenesisState) Validate() error {
 	return gs.Params.Validate()
 }
diff --git a/x/auction/types/genesis.pb.go b/x/builder/types/genesis.pb.go
similarity index 83%
rename from x/auction/types/genesis.pb.go
rename to x/builder/types/genesis.pb.go
index ac92b56..2243b8d 100644
--- a/x/auction/types/genesis.pb.go
+++ b/x/builder/types/genesis.pb.go
@@ -1,5 +1,5 @@
 // Code generated by protoc-gen-gogo. DO NOT EDIT.
-// source: pob/auction/v1/genesis.proto
+// source: pob/builder/v1/genesis.proto
 
 package types
 
@@ -26,7 +26,7 @@ var _ = math.Inf
 // proto package needs to be updated.
 const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
 
-// GenesisState defines the genesis state of the x/auction module.
+// GenesisState defines the genesis state of the x/builder module.
 type GenesisState struct {
 	Params Params `protobuf:"bytes,1,opt,name=params,proto3" json:"params"`
 }
@@ -35,7 +35,7 @@ func (m *GenesisState) Reset()         { *m = GenesisState{} }
 func (m *GenesisState) String() string { return proto.CompactTextString(m) }
 func (*GenesisState) ProtoMessage()    {}
 func (*GenesisState) Descriptor() ([]byte, []int) {
-	return fileDescriptor_9ed8651e43f855a1, []int{0}
+	return fileDescriptor_287f1bdff5ccfc33, []int{0}
 }
 func (m *GenesisState) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -71,7 +71,7 @@ func (m *GenesisState) GetParams() Params {
 	return Params{}
 }
 
-// Params defines the parameters of the x/auction module.
+// Params defines the parameters of the x/builder module.
 type Params struct {
 	// max_bundle_size is the maximum number of transactions that can be bundled
 	// in a single bundle.
@@ -99,7 +99,7 @@ func (m *Params) Reset()         { *m = Params{} }
 func (m *Params) String() string { return proto.CompactTextString(m) }
 func (*Params) ProtoMessage()    {}
 func (*Params) Descriptor() ([]byte, []int) {
-	return fileDescriptor_9ed8651e43f855a1, []int{1}
+	return fileDescriptor_287f1bdff5ccfc33, []int{1}
 }
 func (m *Params) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -171,47 +171,47 @@ func (m *Params) GetFrontRunningProtection() bool {
 }
 
 func init() {
-	proto.RegisterType((*GenesisState)(nil), "skipmev.pob.auction.v1.GenesisState")
-	proto.RegisterType((*Params)(nil), "skipmev.pob.auction.v1.Params")
+	proto.RegisterType((*GenesisState)(nil), "skipmev.pob.builder.v1.GenesisState")
+	proto.RegisterType((*Params)(nil), "skipmev.pob.builder.v1.Params")
 }
 
-func init() { proto.RegisterFile("pob/auction/v1/genesis.proto", fileDescriptor_9ed8651e43f855a1) }
+func init() { proto.RegisterFile("pob/builder/v1/genesis.proto", fileDescriptor_287f1bdff5ccfc33) }
 
-var fileDescriptor_9ed8651e43f855a1 = []byte{
-	// 517 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xb4, 0x93, 0x31, 0x6f, 0xd3, 0x40,
-	0x14, 0xc7, 0x63, 0x1a, 0x02, 0x5c, 0x5a, 0xaa, 0x5a, 0x55, 0x64, 0x0a, 0x72, 0xa2, 0x0e, 0x25,
-	0xaa, 0xd4, 0x3b, 0xa5, 0x80, 0x84, 0x10, 0x4b, 0x02, 0x2a, 0xaa, 0xc4, 0x50, 0xdc, 0x8d, 0xc5,
-	0x3a, 0xdb, 0xaf, 0xe1, 0x54, 0xee, 0xce, 0xdc, 0xd9, 0x26, 0xa9, 0xf8, 0x04, 0x4c, 0x7c, 0x0c,
-	0xc4, 0xd4, 0x8f, 0xd1, 0xb1, 0x23, 0x62, 0x28, 0x28, 0x19, 0xfa, 0x29, 0x90, 0xd0, 0xdd, 0xb9,
-	0xa5, 0x03, 0x03, 0x4b, 0x17, 0xdb, 0xba, 0xff, 0xff, 0xde, 0xef, 0xbd, 0xe7, 0xf7, 0xd0, 0x83,
-	0x5c, 0x26, 0x84, 0x96, 0x69, 0xc1, 0xa4, 0x20, 0xd5, 0x80, 0x8c, 0x41, 0x80, 0x66, 0x1a, 0xe7,
-	0x4a, 0x16, 0xd2, 0xef, 0xe8, 0x43, 0x96, 0x73, 0xa8, 0x70, 0x2e, 0x13, 0x5c, 0xbb, 0x70, 0x35,
-	0x58, 0x5b, 0x1d, 0xcb, 0xb1, 0xb4, 0x16, 0x62, 0xbe, 0x9c, 0x7b, 0x2d, 0x4c, 0xa5, 0xe6, 0x52,
-	0x93, 0x84, 0x6a, 0x20, 0xd5, 0x20, 0x81, 0x82, 0x0e, 0x48, 0x2a, 0x99, 0xa8, 0xf5, 0x15, 0xca,
-	0x99, 0x90, 0xc4, 0x3e, 0xdd, 0xd1, 0xfa, 0x6b, 0xb4, 0xf8, 0xca, 0x11, 0xf7, 0x0b, 0x5a, 0x80,
-	0xff, 0x1c, 0xb5, 0x72, 0xaa, 0x28, 0xd7, 0x81, 0xd7, 0xf3, 0xfa, 0xed, 0xed, 0x10, 0xff, 0x3b,
-	0x03, 0xbc, 0x67, 0x5d, 0xa3, 0xe6, 0xc9, 0x59, 0xb7, 0x11, 0xd5, 0x77, 0xd6, 0x7f, 0x37, 0x51,
-	0xcb, 0x09, 0xfe, 0x06, 0x5a, 0xe6, 0x74, 0x12, 0x27, 0xa5, 0xc8, 0xde, 0x43, 0xac, 0xd9, 0x11,
-	0xd8, 0x88, 0x4b, 0xd1, 0x12, 0xa7, 0x93, 0x91, 0x3d, 0xdd, 0x67, 0x47, 0xe0, 0x3f, 0x46, 0x1d,
-	0xd0, 0xa9, 0x92, 0x1f, 0x63, 0x9a, 0xa6, 0xb2, 0x14, 0x45, 0x4c, 0xb3, 0x4c, 0x81, 0xd6, 0xc1,
-	0x8d, 0x9e, 0xd7, 0xbf, 0x13, 0xad, 0x3a, 0x75, 0xe8, 0xc4, 0xa1, 0xd3, 0xfc, 0x0f, 0xa8, 0xad,
-	0x40, 0x83, 0xaa, 0x20, 0x3e, 0x00, 0x08, 0x16, 0x7a, 0x0b, 0xfd, 0xf6, 0xf6, 0x3d, 0xec, 0xea,
-	0xc7, 0xa6, 0x7e, 0x5c, 0xd7, 0x8f, 0x5f, 0x48, 0x26, 0x46, 0x4f, 0x4c, 0x9a, 0xdf, 0x7e, 0x76,
-	0xfb, 0x63, 0x56, 0xbc, 0x2b, 0x13, 0x9c, 0x4a, 0x4e, 0xea, 0x66, 0xb9, 0xd7, 0x96, 0xce, 0x0e,
-	0x49, 0x31, 0xcd, 0x41, 0xdb, 0x0b, 0xfa, 0xeb, 0xf9, 0xf1, 0xa6, 0x17, 0xa1, 0x1a, 0xb2, 0x03,
-	0xe0, 0x97, 0xe8, 0x2e, 0x67, 0x22, 0x4e, 0xca, 0x69, 0xcc, 0x84, 0xa5, 0x36, 0xaf, 0x89, 0xda,
-	0xe6, 0x4c, 0x8c, 0xca, 0xe9, 0xae, 0x30, 0xd8, 0x4f, 0x68, 0xc5, 0x62, 0x59, 0x16, 0x33, 0x91,
-	0x2a, 0xe0, 0x20, 0x8a, 0xe0, 0xe6, 0x35, 0x91, 0x97, 0x0d, 0x99, 0x65, 0xbb, 0x17, 0x20, 0xff,
-	0x29, 0x0a, 0x0e, 0x94, 0x14, 0x45, 0xac, 0x4a, 0x21, 0x98, 0x18, 0xc7, 0x66, 0x6a, 0xc0, 0x0e,
-	0x41, 0xd0, 0xea, 0x79, 0xfd, 0xdb, 0x51, 0xc7, 0xea, 0x91, 0x93, 0xf7, 0x2e, 0x55, 0xff, 0x0d,
-	0x5a, 0xcc, 0x95, 0xcc, 0xa5, 0x06, 0x65, 0x9b, 0x75, 0xcb, 0xfc, 0xcd, 0x11, 0x36, 0x79, 0xfd,
-	0x38, 0xeb, 0x6e, 0xfc, 0x47, 0x5e, 0x2f, 0x21, 0x8d, 0xda, 0x17, 0x31, 0x76, 0x00, 0x9e, 0xf5,
-	0x3e, 0x9f, 0x1f, 0x6f, 0xde, 0xbf, 0xe2, 0x9b, 0x5c, 0x2e, 0x4e, 0x3d, 0x8d, 0xc3, 0x93, 0x59,
-	0xe8, 0x9d, 0xce, 0x42, 0xef, 0xd7, 0x2c, 0xf4, 0xbe, 0xcc, 0xc3, 0xc6, 0xe9, 0x3c, 0x6c, 0x7c,
-	0x9f, 0x87, 0x8d, 0xb7, 0x0f, 0xaf, 0x00, 0xcd, 0x44, 0x6f, 0x71, 0xa8, 0x88, 0x59, 0xbd, 0xbf,
-	0x31, 0x2c, 0x35, 0x69, 0xd9, 0xbd, 0x78, 0xf4, 0x27, 0x00, 0x00, 0xff, 0xff, 0x32, 0x3f, 0xb6,
-	0x9a, 0x98, 0x03, 0x00, 0x00,
+var fileDescriptor_287f1bdff5ccfc33 = []byte{
+	// 521 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xb4, 0x93, 0xbf, 0x6e, 0x13, 0x4f,
+	0x10, 0xc7, 0x7d, 0xbf, 0xf8, 0x67, 0x60, 0x9d, 0x10, 0xe5, 0x14, 0x59, 0x47, 0x40, 0x67, 0x2b,
+	0x45, 0xb0, 0x22, 0x65, 0x57, 0x0e, 0x20, 0x21, 0x44, 0x63, 0x83, 0x82, 0x22, 0x51, 0x84, 0x4b,
+	0x47, 0x73, 0xba, 0x3f, 0x13, 0xb3, 0x4a, 0x76, 0xf7, 0xd8, 0xdd, 0x3b, 0xec, 0x88, 0x27, 0xa0,
+	0xe2, 0x31, 0x10, 0x55, 0x1e, 0x23, 0x65, 0x4a, 0x44, 0x11, 0x90, 0x5d, 0xe4, 0x29, 0x90, 0xd0,
+	0xee, 0x5e, 0x42, 0x0a, 0x0a, 0x9a, 0x34, 0x77, 0xa7, 0xfd, 0x7e, 0x77, 0x3e, 0x33, 0x73, 0x33,
+	0xe8, 0x41, 0x21, 0x52, 0x92, 0x96, 0xf4, 0x28, 0x07, 0x49, 0xaa, 0x01, 0x19, 0x03, 0x07, 0x45,
+	0x15, 0x2e, 0xa4, 0xd0, 0xc2, 0xef, 0xa8, 0x43, 0x5a, 0x30, 0xa8, 0x70, 0x21, 0x52, 0x5c, 0xbb,
+	0x70, 0x35, 0x58, 0x5b, 0x1d, 0x8b, 0xb1, 0xb0, 0x16, 0x62, 0xbe, 0x9c, 0x7b, 0x2d, 0xcc, 0x84,
+	0x62, 0x42, 0x91, 0x34, 0x51, 0x40, 0xaa, 0x41, 0x0a, 0x3a, 0x19, 0x90, 0x4c, 0x50, 0x5e, 0xeb,
+	0x2b, 0x09, 0xa3, 0x5c, 0x10, 0xfb, 0x74, 0x47, 0xeb, 0xaf, 0xd1, 0xe2, 0x2b, 0x47, 0xdc, 0xd7,
+	0x89, 0x06, 0xff, 0x39, 0x6a, 0x15, 0x89, 0x4c, 0x98, 0x0a, 0xbc, 0x9e, 0xd7, 0x6f, 0x6f, 0x87,
+	0xf8, 0xef, 0x19, 0xe0, 0x3d, 0xeb, 0x1a, 0x35, 0x4f, 0xcf, 0xbb, 0x8d, 0xa8, 0xbe, 0xb3, 0xfe,
+	0xab, 0x89, 0x5a, 0x4e, 0xf0, 0x37, 0xd0, 0x32, 0x4b, 0x26, 0x71, 0x5a, 0xf2, 0xfc, 0x08, 0x62,
+	0x45, 0x8f, 0xc1, 0x46, 0x5c, 0x8a, 0x96, 0x58, 0x32, 0x19, 0xd9, 0xd3, 0x7d, 0x7a, 0x0c, 0xfe,
+	0x63, 0xd4, 0x01, 0x95, 0x49, 0xf1, 0x21, 0x4e, 0xb2, 0x4c, 0x94, 0x5c, 0xc7, 0x49, 0x9e, 0x4b,
+	0x50, 0x2a, 0xf8, 0xaf, 0xe7, 0xf5, 0xef, 0x44, 0xab, 0x4e, 0x1d, 0x3a, 0x71, 0xe8, 0x34, 0xff,
+	0x3d, 0x6a, 0x4b, 0x50, 0x20, 0x2b, 0x88, 0x0f, 0x00, 0x82, 0x85, 0xde, 0x42, 0xbf, 0xbd, 0x7d,
+	0x0f, 0xbb, 0xfa, 0xb1, 0xa9, 0x1f, 0xd7, 0xf5, 0xe3, 0x17, 0x82, 0xf2, 0xd1, 0x13, 0x93, 0xe6,
+	0xd7, 0x1f, 0xdd, 0xfe, 0x98, 0xea, 0x77, 0x65, 0x8a, 0x33, 0xc1, 0x48, 0xdd, 0x2c, 0xf7, 0xda,
+	0x52, 0xf9, 0x21, 0xd1, 0xd3, 0x02, 0x94, 0xbd, 0xa0, 0xbe, 0x5c, 0x9c, 0x6c, 0x7a, 0x11, 0xaa,
+	0x21, 0x3b, 0x00, 0x7e, 0x89, 0xee, 0x32, 0xca, 0xe3, 0xb4, 0x9c, 0xc6, 0x94, 0x5b, 0x6a, 0xf3,
+	0x86, 0xa8, 0x6d, 0x46, 0xf9, 0xa8, 0x9c, 0xee, 0x72, 0x83, 0xfd, 0x88, 0x56, 0x2c, 0x96, 0xe6,
+	0x31, 0xe5, 0x99, 0x04, 0x06, 0x5c, 0x07, 0xff, 0xdf, 0x10, 0x79, 0xd9, 0x90, 0x69, 0xbe, 0x7b,
+	0x09, 0xf2, 0x9f, 0xa2, 0xe0, 0x40, 0x0a, 0xae, 0x63, 0x59, 0x72, 0x4e, 0xf9, 0x38, 0x36, 0x53,
+	0x03, 0x99, 0xa6, 0x82, 0x07, 0xad, 0x9e, 0xd7, 0xbf, 0x1d, 0x75, 0xac, 0x1e, 0x39, 0x79, 0xef,
+	0x4a, 0xf5, 0xdf, 0xa0, 0xc5, 0x42, 0x8a, 0x42, 0x28, 0x90, 0xb6, 0x59, 0xb7, 0xcc, 0xdf, 0x1c,
+	0x61, 0x93, 0xd7, 0xf7, 0xf3, 0xee, 0xc6, 0x3f, 0xe4, 0xf5, 0x12, 0xb2, 0xa8, 0x7d, 0x19, 0x63,
+	0x07, 0xe0, 0x59, 0xef, 0xd3, 0xc5, 0xc9, 0xe6, 0xfd, 0x6b, 0xbe, 0xc9, 0xd5, 0xe2, 0xd4, 0xd3,
+	0x38, 0x3c, 0x9d, 0x85, 0xde, 0xd9, 0x2c, 0xf4, 0x7e, 0xce, 0x42, 0xef, 0xf3, 0x3c, 0x6c, 0x9c,
+	0xcd, 0xc3, 0xc6, 0xb7, 0x79, 0xd8, 0x78, 0xfb, 0xf0, 0x1a, 0xd0, 0x4c, 0xf4, 0x16, 0x83, 0x8a,
+	0x98, 0xd5, 0xfb, 0x13, 0xc3, 0x52, 0xd3, 0x96, 0xdd, 0x8b, 0x47, 0xbf, 0x03, 0x00, 0x00, 0xff,
+	0xff, 0xe5, 0xc0, 0xeb, 0xb3, 0x98, 0x03, 0x00, 0x00,
 }
 
 func (m *GenesisState) Marshal() (dAtA []byte, err error) {
diff --git a/x/builder/types/keys.go b/x/builder/types/keys.go
new file mode 100644
index 0000000..3bc7f21
--- /dev/null
+++ b/x/builder/types/keys.go
@@ -0,0 +1,22 @@
+package types
+
+const (
+	// ModuleName is the name of the builder module
+	ModuleName = "builder"
+
+	// StoreKey is the default store key for the builder module
+	StoreKey = ModuleName
+
+	// RouterKey is the message route for the builder module
+	RouterKey = ModuleName
+
+	// QuerierRoute is the querier route for the builder module
+	QuerierRoute = ModuleName
+)
+
+const (
+	prefixParams = iota + 1
+)
+
+// KeyParams is the store key for the builder module's parameters.
+var KeyParams = []byte{prefixParams}
diff --git a/x/auction/types/msgs.go b/x/builder/types/msgs.go
similarity index 100%
rename from x/auction/types/msgs.go
rename to x/builder/types/msgs.go
diff --git a/x/auction/types/msgs_test.go b/x/builder/types/msgs_test.go
similarity index 98%
rename from x/auction/types/msgs_test.go
rename to x/builder/types/msgs_test.go
index 3c1dd2e..a2f9ca4 100644
--- a/x/auction/types/msgs_test.go
+++ b/x/builder/types/msgs_test.go
@@ -4,7 +4,7 @@ import (
 	"testing"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/skip-mev/pob/x/auction/types"
+	"github.com/skip-mev/pob/x/builder/types"
 )
 
 // TestMsgAuctionBid tests the ValidateBasic method of MsgAuctionBid
diff --git a/x/auction/types/params.go b/x/builder/types/params.go
similarity index 97%
rename from x/auction/types/params.go
rename to x/builder/types/params.go
index bada567..4a7deab 100644
--- a/x/auction/types/params.go
+++ b/x/builder/types/params.go
@@ -36,7 +36,7 @@ func NewParams(
 	}
 }
 
-// DefaultParams returns the default x/auction parameters.
+// DefaultParams returns the default x/builder parameters.
 func DefaultParams() Params {
 	return NewParams(
 		DefaultMaxBundleSize,
diff --git a/x/auction/types/query.pb.go b/x/builder/types/query.pb.go
similarity index 84%
rename from x/auction/types/query.pb.go
rename to x/builder/types/query.pb.go
index ee5ecee..843f22c 100644
--- a/x/auction/types/query.pb.go
+++ b/x/builder/types/query.pb.go
@@ -1,12 +1,11 @@
 // Code generated by protoc-gen-gogo. DO NOT EDIT.
-// source: pob/auction/v1/query.proto
+// source: pob/builder/v1/query.proto
 
 package types
 
 import (
 	context "context"
 	fmt "fmt"
-	_ "github.com/cosmos/cosmos-proto"
 	_ "github.com/cosmos/cosmos-sdk/types/query"
 	_ "github.com/cosmos/gogoproto/gogoproto"
 	grpc1 "github.com/cosmos/gogoproto/grpc"
@@ -39,7 +38,7 @@ func (m *QueryParamsRequest) Reset()         { *m = QueryParamsRequest{} }
 func (m *QueryParamsRequest) String() string { return proto.CompactTextString(m) }
 func (*QueryParamsRequest) ProtoMessage()    {}
 func (*QueryParamsRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_358d843f609c8630, []int{0}
+	return fileDescriptor_fe4920efc6923232, []int{0}
 }
 func (m *QueryParamsRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -78,7 +77,7 @@ func (m *QueryParamsResponse) Reset()         { *m = QueryParamsResponse{} }
 func (m *QueryParamsResponse) String() string { return proto.CompactTextString(m) }
 func (*QueryParamsResponse) ProtoMessage()    {}
 func (*QueryParamsResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_358d843f609c8630, []int{1}
+	return fileDescriptor_fe4920efc6923232, []int{1}
 }
 func (m *QueryParamsResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -115,34 +114,34 @@ func (m *QueryParamsResponse) GetParams() Params {
 }
 
 func init() {
-	proto.RegisterType((*QueryParamsRequest)(nil), "skipmev.pob.auction.v1.QueryParamsRequest")
-	proto.RegisterType((*QueryParamsResponse)(nil), "skipmev.pob.auction.v1.QueryParamsResponse")
+	proto.RegisterType((*QueryParamsRequest)(nil), "skipmev.pob.builder.v1.QueryParamsRequest")
+	proto.RegisterType((*QueryParamsResponse)(nil), "skipmev.pob.builder.v1.QueryParamsResponse")
 }
 
-func init() { proto.RegisterFile("pob/auction/v1/query.proto", fileDescriptor_358d843f609c8630) }
+func init() { proto.RegisterFile("pob/builder/v1/query.proto", fileDescriptor_fe4920efc6923232) }
 
-var fileDescriptor_358d843f609c8630 = []byte{
-	// 315 bytes of a gzipped FileDescriptorProto
+var fileDescriptor_fe4920efc6923232 = []byte{
+	// 307 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x2a, 0xc8, 0x4f, 0xd2,
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-	0x39, 0x86, 0x0b, 0x8f, 0xe5, 0x18, 0x6e, 0x3c, 0x96, 0x63, 0x88, 0x52, 0x4f, 0xcf, 0x2c, 0xc9,
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-	0x00, 0xff, 0xff, 0x01, 0x0c, 0x7f, 0xf9, 0x07, 0x02, 0x00, 0x00,
+	0x0b, 0x32, 0xf5, 0x13, 0xf3, 0xf2, 0xf2, 0x4b, 0x12, 0x4b, 0x32, 0xf3, 0xf3, 0x8a, 0xa1, 0xb2,
+	0xd2, 0xc9, 0xf9, 0xc5, 0xb9, 0xf9, 0xc5, 0x10, 0xf3, 0xd1, 0x2c, 0x92, 0x92, 0x41, 0x73, 0x44,
+	0x7a, 0x6a, 0x5e, 0x6a, 0x71, 0x26, 0x54, 0xab, 0x92, 0x08, 0x97, 0x50, 0x20, 0x48, 0x71, 0x40,
+	0x62, 0x51, 0x62, 0x6e, 0x71, 0x50, 0x6a, 0x61, 0x69, 0x6a, 0x71, 0x89, 0x52, 0x30, 0x97, 0x30,
+	0x8a, 0x68, 0x71, 0x41, 0x7e, 0x5e, 0x71, 0xaa, 0x90, 0x0d, 0x17, 0x5b, 0x01, 0x58, 0x44, 0x82,
+	0x51, 0x81, 0x51, 0x83, 0xdb, 0x48, 0x4e, 0x0f, 0xbb, 0x27, 0xf4, 0x20, 0xfa, 0x9c, 0x58, 0x4e,
+	0xdc, 0x93, 0x67, 0x08, 0x82, 0xea, 0x31, 0x9a, 0xc0, 0xc8, 0xc5, 0x0a, 0x36, 0x55, 0xa8, 0x8d,
+	0x91, 0x8b, 0x0d, 0xa2, 0x44, 0x48, 0x0b, 0x97, 0x11, 0x98, 0xae, 0x92, 0xd2, 0x26, 0x4a, 0x2d,
+	0xc4, 0xad, 0x4a, 0xca, 0x1d, 0xcf, 0x37, 0x68, 0x31, 0x36, 0x5d, 0x7e, 0x32, 0x99, 0x49, 0x42,
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+	0x01, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -157,7 +156,7 @@ const _ = grpc.SupportPackageIsVersion4
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
 type QueryClient interface {
-	// Params queries the parameters of the x/auction module.
+	// Params queries the parameters of the x/builder module.
 	Params(ctx context.Context, in *QueryParamsRequest, opts ...grpc.CallOption) (*QueryParamsResponse, error)
 }
 
@@ -171,7 +170,7 @@ func NewQueryClient(cc grpc1.ClientConn) QueryClient {
 
 func (c *queryClient) Params(ctx context.Context, in *QueryParamsRequest, opts ...grpc.CallOption) (*QueryParamsResponse, error) {
 	out := new(QueryParamsResponse)
-	err := c.cc.Invoke(ctx, "/skipmev.pob.auction.v1.Query/Params", in, out, opts...)
+	err := c.cc.Invoke(ctx, "/skipmev.pob.builder.v1.Query/Params", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -180,7 +179,7 @@ func (c *queryClient) Params(ctx context.Context, in *QueryParamsRequest, opts .
 
 // QueryServer is the server API for Query service.
 type QueryServer interface {
-	// Params queries the parameters of the x/auction module.
+	// Params queries the parameters of the x/builder module.
 	Params(context.Context, *QueryParamsRequest) (*QueryParamsResponse, error)
 }
 
@@ -206,7 +205,7 @@ func _Query_Params_Handler(srv interface{}, ctx context.Context, dec func(interf
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/skipmev.pob.auction.v1.Query/Params",
+		FullMethod: "/skipmev.pob.builder.v1.Query/Params",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
 		return srv.(QueryServer).Params(ctx, req.(*QueryParamsRequest))
@@ -215,7 +214,7 @@ func _Query_Params_Handler(srv interface{}, ctx context.Context, dec func(interf
 }
 
 var _Query_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "skipmev.pob.auction.v1.Query",
+	ServiceName: "skipmev.pob.builder.v1.Query",
 	HandlerType: (*QueryServer)(nil),
 	Methods: []grpc.MethodDesc{
 		{
@@ -224,7 +223,7 @@ var _Query_serviceDesc = grpc.ServiceDesc{
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
-	Metadata: "pob/auction/v1/query.proto",
+	Metadata: "pob/builder/v1/query.proto",
 }
 
 func (m *QueryParamsRequest) Marshal() (dAtA []byte, err error) {
diff --git a/x/auction/types/query.pb.gw.go b/x/builder/types/query.pb.gw.go
similarity index 98%
rename from x/auction/types/query.pb.gw.go
rename to x/builder/types/query.pb.gw.go
index 4d6e32d..667955c 100644
--- a/x/auction/types/query.pb.gw.go
+++ b/x/builder/types/query.pb.gw.go
@@ -1,5 +1,5 @@
 // Code generated by protoc-gen-grpc-gateway. DO NOT EDIT.
-// source: pob/auction/v1/query.proto
+// source: pob/builder/v1/query.proto
 
 /*
 Package types is a reverse proxy.
@@ -145,7 +145,7 @@ func RegisterQueryHandlerClient(ctx context.Context, mux *runtime.ServeMux, clie
 }
 
 var (
-	pattern_Query_Params_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"pob", "auction", "v1", "params"}, "", runtime.AssumeColonVerbOpt(false)))
+	pattern_Query_Params_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"pob", "builder", "v1", "params"}, "", runtime.AssumeColonVerbOpt(false)))
 )
 
 var (
diff --git a/x/auction/types/tx.pb.go b/x/builder/types/tx.pb.go
similarity index 84%
rename from x/auction/types/tx.pb.go
rename to x/builder/types/tx.pb.go
index f8a82d1..3b0e34b 100644
--- a/x/auction/types/tx.pb.go
+++ b/x/builder/types/tx.pb.go
@@ -1,5 +1,5 @@
 // Code generated by protoc-gen-gogo. DO NOT EDIT.
-// source: pob/auction/v1/tx.proto
+// source: pob/builder/v1/tx.proto
 
 package types
 
@@ -34,7 +34,7 @@ var _ = math.Inf
 // proto package needs to be updated.
 const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
 
-// MsgAuctionBid defines a request type for sending bids to the x/auction
+// MsgAuctionBid defines a request type for sending bids to the x/builder
 // module.
 type MsgAuctionBid struct {
 	// bidder is the address of the account that is submitting a bid to the
@@ -52,7 +52,7 @@ func (m *MsgAuctionBid) Reset()         { *m = MsgAuctionBid{} }
 func (m *MsgAuctionBid) String() string { return proto.CompactTextString(m) }
 func (*MsgAuctionBid) ProtoMessage()    {}
 func (*MsgAuctionBid) Descriptor() ([]byte, []int) {
-	return fileDescriptor_450b077ed2625255, []int{0}
+	return fileDescriptor_5cab4e3a4b082d0a, []int{0}
 }
 func (m *MsgAuctionBid) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -110,7 +110,7 @@ func (m *MsgAuctionBidResponse) Reset()         { *m = MsgAuctionBidResponse{} }
 func (m *MsgAuctionBidResponse) String() string { return proto.CompactTextString(m) }
 func (*MsgAuctionBidResponse) ProtoMessage()    {}
 func (*MsgAuctionBidResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_450b077ed2625255, []int{1}
+	return fileDescriptor_5cab4e3a4b082d0a, []int{1}
 }
 func (m *MsgAuctionBidResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -139,13 +139,13 @@ func (m *MsgAuctionBidResponse) XXX_DiscardUnknown() {
 
 var xxx_messageInfo_MsgAuctionBidResponse proto.InternalMessageInfo
 
-// MsgUpdateParams defines a request type for updating the x/auction module
+// MsgUpdateParams defines a request type for updating the x/builder module
 // parameters.
 type MsgUpdateParams struct {
 	// authority is the address of the account that is authorized to update the
-	// x/auction module parameters.
+	// x/builder module parameters.
 	Authority string `protobuf:"bytes,1,opt,name=authority,proto3" json:"authority,omitempty"`
-	// params is the new parameters for the x/auction module.
+	// params is the new parameters for the x/builder module.
 	Params Params `protobuf:"bytes,2,opt,name=params,proto3" json:"params"`
 }
 
@@ -153,7 +153,7 @@ func (m *MsgUpdateParams) Reset()         { *m = MsgUpdateParams{} }
 func (m *MsgUpdateParams) String() string { return proto.CompactTextString(m) }
 func (*MsgUpdateParams) ProtoMessage()    {}
 func (*MsgUpdateParams) Descriptor() ([]byte, []int) {
-	return fileDescriptor_450b077ed2625255, []int{2}
+	return fileDescriptor_5cab4e3a4b082d0a, []int{2}
 }
 func (m *MsgUpdateParams) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -204,7 +204,7 @@ func (m *MsgUpdateParamsResponse) Reset()         { *m = MsgUpdateParamsResponse
 func (m *MsgUpdateParamsResponse) String() string { return proto.CompactTextString(m) }
 func (*MsgUpdateParamsResponse) ProtoMessage()    {}
 func (*MsgUpdateParamsResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_450b077ed2625255, []int{3}
+	return fileDescriptor_5cab4e3a4b082d0a, []int{3}
 }
 func (m *MsgUpdateParamsResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -234,51 +234,51 @@ func (m *MsgUpdateParamsResponse) XXX_DiscardUnknown() {
 var xxx_messageInfo_MsgUpdateParamsResponse proto.InternalMessageInfo
 
 func init() {
-	proto.RegisterType((*MsgAuctionBid)(nil), "skipmev.pob.auction.v1.MsgAuctionBid")
-	proto.RegisterType((*MsgAuctionBidResponse)(nil), "skipmev.pob.auction.v1.MsgAuctionBidResponse")
-	proto.RegisterType((*MsgUpdateParams)(nil), "skipmev.pob.auction.v1.MsgUpdateParams")
-	proto.RegisterType((*MsgUpdateParamsResponse)(nil), "skipmev.pob.auction.v1.MsgUpdateParamsResponse")
+	proto.RegisterType((*MsgAuctionBid)(nil), "skipmev.pob.builder.v1.MsgAuctionBid")
+	proto.RegisterType((*MsgAuctionBidResponse)(nil), "skipmev.pob.builder.v1.MsgAuctionBidResponse")
+	proto.RegisterType((*MsgUpdateParams)(nil), "skipmev.pob.builder.v1.MsgUpdateParams")
+	proto.RegisterType((*MsgUpdateParamsResponse)(nil), "skipmev.pob.builder.v1.MsgUpdateParamsResponse")
 }
 
-func init() { proto.RegisterFile("pob/auction/v1/tx.proto", fileDescriptor_450b077ed2625255) }
+func init() { proto.RegisterFile("pob/builder/v1/tx.proto", fileDescriptor_5cab4e3a4b082d0a) }
 
-var fileDescriptor_450b077ed2625255 = []byte{
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-	0xff, 0xff, 0x7a, 0x09, 0xc0, 0x53, 0x20, 0x04, 0x00, 0x00,
+var fileDescriptor_5cab4e3a4b082d0a = []byte{
+	// 559 bytes of a gzipped FileDescriptorProto
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -293,9 +293,9 @@ const _ = grpc.SupportPackageIsVersion4
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
 type MsgClient interface {
-	// AuctionBid defines a method for sending bids to the x/auction module.
+	// AuctionBid defines a method for sending bids to the x/builder module.
 	AuctionBid(ctx context.Context, in *MsgAuctionBid, opts ...grpc.CallOption) (*MsgAuctionBidResponse, error)
-	// UpdateParams defines a governance operation for updating the x/auction
+	// UpdateParams defines a governance operation for updating the x/builder
 	// module parameters. The authority is hard-coded to the x/gov module account.
 	UpdateParams(ctx context.Context, in *MsgUpdateParams, opts ...grpc.CallOption) (*MsgUpdateParamsResponse, error)
 }
@@ -310,7 +310,7 @@ func NewMsgClient(cc grpc1.ClientConn) MsgClient {
 
 func (c *msgClient) AuctionBid(ctx context.Context, in *MsgAuctionBid, opts ...grpc.CallOption) (*MsgAuctionBidResponse, error) {
 	out := new(MsgAuctionBidResponse)
-	err := c.cc.Invoke(ctx, "/skipmev.pob.auction.v1.Msg/AuctionBid", in, out, opts...)
+	err := c.cc.Invoke(ctx, "/skipmev.pob.builder.v1.Msg/AuctionBid", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -319,7 +319,7 @@ func (c *msgClient) AuctionBid(ctx context.Context, in *MsgAuctionBid, opts ...g
 
 func (c *msgClient) UpdateParams(ctx context.Context, in *MsgUpdateParams, opts ...grpc.CallOption) (*MsgUpdateParamsResponse, error) {
 	out := new(MsgUpdateParamsResponse)
-	err := c.cc.Invoke(ctx, "/skipmev.pob.auction.v1.Msg/UpdateParams", in, out, opts...)
+	err := c.cc.Invoke(ctx, "/skipmev.pob.builder.v1.Msg/UpdateParams", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -328,9 +328,9 @@ func (c *msgClient) UpdateParams(ctx context.Context, in *MsgUpdateParams, opts
 
 // MsgServer is the server API for Msg service.
 type MsgServer interface {
-	// AuctionBid defines a method for sending bids to the x/auction module.
+	// AuctionBid defines a method for sending bids to the x/builder module.
 	AuctionBid(context.Context, *MsgAuctionBid) (*MsgAuctionBidResponse, error)
-	// UpdateParams defines a governance operation for updating the x/auction
+	// UpdateParams defines a governance operation for updating the x/builder
 	// module parameters. The authority is hard-coded to the x/gov module account.
 	UpdateParams(context.Context, *MsgUpdateParams) (*MsgUpdateParamsResponse, error)
 }
@@ -360,7 +360,7 @@ func _Msg_AuctionBid_Handler(srv interface{}, ctx context.Context, dec func(inte
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/skipmev.pob.auction.v1.Msg/AuctionBid",
+		FullMethod: "/skipmev.pob.builder.v1.Msg/AuctionBid",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
 		return srv.(MsgServer).AuctionBid(ctx, req.(*MsgAuctionBid))
@@ -378,7 +378,7 @@ func _Msg_UpdateParams_Handler(srv interface{}, ctx context.Context, dec func(in
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/skipmev.pob.auction.v1.Msg/UpdateParams",
+		FullMethod: "/skipmev.pob.builder.v1.Msg/UpdateParams",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
 		return srv.(MsgServer).UpdateParams(ctx, req.(*MsgUpdateParams))
@@ -387,7 +387,7 @@ func _Msg_UpdateParams_Handler(srv interface{}, ctx context.Context, dec func(in
 }
 
 var _Msg_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "skipmev.pob.auction.v1.Msg",
+	ServiceName: "skipmev.pob.builder.v1.Msg",
 	HandlerType: (*MsgServer)(nil),
 	Methods: []grpc.MethodDesc{
 		{
@@ -400,7 +400,7 @@ var _Msg_serviceDesc = grpc.ServiceDesc{
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
-	Metadata: "pob/auction/v1/tx.proto",
+	Metadata: "pob/builder/v1/tx.proto",
 }
 
 func (m *MsgAuctionBid) Marshal() (dAtA []byte, err error) {
diff --git a/x/auction/types/tx.pb.gw.go b/x/builder/types/tx.pb.gw.go
similarity index 98%
rename from x/auction/types/tx.pb.gw.go
rename to x/builder/types/tx.pb.gw.go
index b7c9620..bb907aa 100644
--- a/x/auction/types/tx.pb.gw.go
+++ b/x/builder/types/tx.pb.gw.go
@@ -1,5 +1,5 @@
 // Code generated by protoc-gen-grpc-gateway. DO NOT EDIT.
-// source: pob/auction/v1/tx.proto
+// source: pob/builder/v1/tx.proto
 
 /*
 Package types is a reverse proxy.
@@ -163,7 +163,7 @@ func RegisterMsgHandlerClient(ctx context.Context, mux *runtime.ServeMux, client
 }
 
 var (
-	pattern_Msg_AuctionBid_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"pob", "auction", "v1", "bid"}, "", runtime.AssumeColonVerbOpt(false)))
+	pattern_Msg_AuctionBid_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"pob", "builder", "v1", "bid"}, "", runtime.AssumeColonVerbOpt(false)))
 )
 
 var (