diff --git a/.golangci.yml b/.golangci.yml
index 73be3d77..15b2cc84 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -10,7 +10,6 @@ run:
 linters:
   disable-all: true
   enable:
-    - depguard
     - dogsled
     - exportloopref
     - goconst
diff --git a/abci/abci_test.go b/abci/abci_test.go
index 49683381..99c97003 100644
--- a/abci/abci_test.go
+++ b/abci/abci_test.go
@@ -52,7 +52,7 @@ type ABCITestSuite struct {
 
 	// account set up
 	accounts []testutils.Account
-	balances sdk.Coins
+	balance  sdk.Coin
 	random   *rand.Rand
 	nonces   map[string]uint64
 }
@@ -100,8 +100,8 @@ func (suite *ABCITestSuite) SetupTest() {
 	suite.builderDecorator = ante.NewBuilderDecorator(suite.builderKeeper, suite.encodingConfig.TxConfig.TxEncoder(), suite.mempool)
 
 	// Accounts set up
-	suite.accounts = testutils.RandomAccounts(suite.random, 1)
-	suite.balances = sdk.NewCoins(sdk.NewCoin("foo", sdk.NewInt(1000000000000000000)))
+	suite.accounts = testutils.RandomAccounts(suite.random, 10)
+	suite.balance = sdk.NewCoin("foo", sdk.NewInt(1000000000000000000))
 	suite.nonces = make(map[string]uint64)
 	for _, acc := range suite.accounts {
 		suite.nonces[acc.Address.String()] = 0
@@ -114,7 +114,7 @@ func (suite *ABCITestSuite) SetupTest() {
 
 func (suite *ABCITestSuite) anteHandler(ctx sdk.Context, tx sdk.Tx, simulate bool) (sdk.Context, error) {
 	signer := tx.GetMsgs()[0].GetSigners()[0]
-	suite.bankKeeper.EXPECT().GetAllBalances(ctx, signer).AnyTimes().Return(suite.balances)
+	suite.bankKeeper.EXPECT().GetBalance(ctx, signer, suite.balance.Denom).AnyTimes().Return(suite.balance)
 
 	next := func(ctx sdk.Context, tx sdk.Tx, simulate bool) (sdk.Context, error) {
 		return ctx, nil
diff --git a/proto/pob/builder/v1/tx.proto b/proto/pob/builder/v1/tx.proto
index efd0cbb7..47d7b0fc 100644
--- a/proto/pob/builder/v1/tx.proto
+++ b/proto/pob/builder/v1/tx.proto
@@ -38,11 +38,11 @@ message MsgAuctionBid {
   string bidder = 1 [ (cosmos_proto.scalar) = "cosmos.AddressString" ];
   // bid is the amount of coins that the bidder is bidding to participate in the
   // auction.
-  cosmos.base.v1beta1.Coin bid = 3
+  cosmos.base.v1beta1.Coin bid = 2
       [ (gogoproto.nullable) = false, (amino.dont_omitempty) = true ];
   // transactions are the bytes of the transactions that the bidder wants to
   // bundle together.
-  repeated bytes transactions = 4;
+  repeated bytes transactions = 3;
 }
 
 // MsgAuctionBidResponse defines the Msg/AuctionBid response type.
diff --git a/testutils/mocks.go b/testutils/mocks.go
index fac417e8..ee59ca94 100644
--- a/testutils/mocks.go
+++ b/testutils/mocks.go
@@ -58,16 +58,16 @@ func (m *MockBankKeeper) EXPECT() *MockBankKeeperMockRecorder {
 	return m.recorder
 }
 
-func (m *MockBankKeeper) GetAllBalances(ctx sdk.Context, addr sdk.AccAddress) sdk.Coins {
+func (m *MockBankKeeper) GetBalance(ctx sdk.Context, addr sdk.AccAddress, denom string) sdk.Coin {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "GetAllBalances", ctx, addr)
-	ret0 := ret[0].(sdk.Coins)
+	ret := m.ctrl.Call(m, "GetBalance", ctx, addr, denom)
+	ret0 := ret[0].(sdk.Coin)
 	return ret0
 }
 
-func (mr *MockBankKeeperMockRecorder) GetAllBalances(ctx, addr interface{}) *gomock.Call {
+func (mr *MockBankKeeperMockRecorder) GetBalance(ctx, addr, denom interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetAllBalances", reflect.TypeOf((*MockBankKeeper)(nil).GetAllBalances), ctx, addr)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetBalance", reflect.TypeOf((*MockBankKeeper)(nil).GetBalance), ctx, addr, denom)
 }
 
 func (m *MockBankKeeper) SendCoins(ctx sdk.Context, fromAddr sdk.AccAddress, toAddr sdk.AccAddress, amt sdk.Coins) error {
diff --git a/x/builder/ante/ante_test.go b/x/builder/ante/ante_test.go
index d2a5d9a4..dec95d7c 100644
--- a/x/builder/ante/ante_test.go
+++ b/x/builder/ante/ante_test.go
@@ -34,6 +34,9 @@ type AnteTestSuite struct {
 	builderDecorator ante.BuilderDecorator
 	key              *storetypes.KVStoreKey
 	authorityAccount sdk.AccAddress
+
+	// Account set up
+	balance sdk.Coin
 }
 
 func TestAnteTestSuite(t *testing.T) {
@@ -69,15 +72,15 @@ func (suite *AnteTestSuite) SetupTest() {
 	suite.Require().NoError(err)
 }
 
-func (suite *AnteTestSuite) executeAnteHandler(tx sdk.Tx, balance sdk.Coins) (sdk.Context, error) {
+func (suite *AnteTestSuite) anteHandler(ctx sdk.Context, tx sdk.Tx, _ bool) (sdk.Context, error) {
 	signer := tx.GetMsgs()[0].GetSigners()[0]
-	suite.bankKeeper.EXPECT().GetAllBalances(suite.ctx, signer).AnyTimes().Return(balance)
+	suite.bankKeeper.EXPECT().GetBalance(ctx, signer, suite.balance.Denom).AnyTimes().Return(suite.balance)
 
-	next := func(ctx sdk.Context, tx sdk.Tx, simulate bool) (sdk.Context, error) {
+	next := func(ctx sdk.Context, tx sdk.Tx, _ bool) (sdk.Context, error) {
 		return ctx, nil
 	}
 
-	return suite.builderDecorator.AnteHandle(suite.ctx, tx, false, next)
+	return suite.builderDecorator.AnteHandle(ctx, tx, false, next)
 }
 
 func (suite *AnteTestSuite) TestAnteHandler() {
@@ -85,7 +88,7 @@ func (suite *AnteTestSuite) TestAnteHandler() {
 		// Bid set up
 		bidder  = testutils.RandomAccounts(suite.random, 1)[0]
 		bid     = sdk.NewCoin("foo", sdk.NewInt(1000))
-		balance = sdk.NewCoins(sdk.NewCoin("foo", sdk.NewInt(10000)))
+		balance = sdk.NewCoin("foo", sdk.NewInt(10000))
 		signers = []testutils.Account{bidder}
 
 		// Top bidding auction tx set up
@@ -125,14 +128,14 @@ func (suite *AnteTestSuite) TestAnteHandler() {
 			"bidder has insufficient balance, invalid auction tx",
 			func() {
 				insertTopBid = false
-				balance = sdk.NewCoins(sdk.NewCoin("foo", sdk.NewInt(10)))
+				balance = sdk.NewCoin("foo", sdk.NewInt(10))
 			},
 			false,
 		},
 		{
 			"bid is smaller than reserve fee, invalid auction tx",
 			func() {
-				balance = sdk.NewCoins(sdk.NewCoin("foo", sdk.NewInt(10000)))
+				balance = sdk.NewCoin("foo", sdk.NewInt(10000))
 				bid = sdk.NewCoin("foo", sdk.NewInt(101))
 				reserveFee = sdk.NewCoin("foo", sdk.NewInt(1000))
 			},
@@ -141,7 +144,7 @@ func (suite *AnteTestSuite) TestAnteHandler() {
 		{
 			"valid auction bid tx",
 			func() {
-				balance = sdk.NewCoins(sdk.NewCoin("foo", sdk.NewInt(10000)))
+				balance = sdk.NewCoin("foo", sdk.NewInt(10000))
 				bid = sdk.NewCoin("foo", sdk.NewInt(1000))
 				reserveFee = sdk.NewCoin("foo", sdk.NewInt(100))
 			},
@@ -158,7 +161,7 @@ func (suite *AnteTestSuite) TestAnteHandler() {
 			"auction tx is the top bidding tx",
 			func() {
 				timeout = 1000
-				balance = sdk.NewCoins(sdk.NewCoin("foo", sdk.NewInt(10000)))
+				balance = sdk.NewCoin("foo", sdk.NewInt(10000))
 				bid = sdk.NewCoin("foo", sdk.NewInt(1000))
 				reserveFee = sdk.NewCoin("foo", sdk.NewInt(100))
 
@@ -249,7 +252,8 @@ func (suite *AnteTestSuite) TestAnteHandler() {
 
 			// Execute the ante handler
 			suite.builderDecorator = ante.NewBuilderDecorator(suite.builderKeeper, suite.encodingConfig.TxConfig.TxEncoder(), mempool)
-			_, err = suite.executeAnteHandler(auctionTx, balance)
+			suite.balance = balance
+			_, err = suite.anteHandler(suite.ctx, auctionTx, false)
 			if tc.pass {
 				suite.Require().NoError(err)
 			} else {
diff --git a/x/builder/client/cli/query.go b/x/builder/client/cli/query.go
index 077b54e9..dea95197 100644
--- a/x/builder/client/cli/query.go
+++ b/x/builder/client/cli/query.go
@@ -34,7 +34,11 @@ func CmdQueryParams() *cobra.Command {
 		Short: "Query the current parameters of the builder module",
 		Args:  cobra.NoArgs,
 		RunE: func(cmd *cobra.Command, args []string) error {
-			clientCtx := client.GetClientContextFromCmd(cmd)
+			clientCtx, err := client.GetClientQueryContext(cmd)
+			if err != nil {
+				return err
+			}
+
 			queryClient := types.NewQueryClient(clientCtx)
 
 			request := &types.QueryParamsRequest{}
diff --git a/x/builder/client/cli/tx.go b/x/builder/client/cli/tx.go
index b545d636..73ce0b87 100644
--- a/x/builder/client/cli/tx.go
+++ b/x/builder/client/cli/tx.go
@@ -42,7 +42,9 @@ where each transaction is a hex-encoded string of a signed transaction.
 		Args:    cobra.ExactArgs(3),
 		Example: "auction-bid cosmos1... 10000uatom 0xFF...,0xCC...,0xAA...",
 		RunE: func(cmd *cobra.Command, args []string) error {
-			cmd.Flags().Set(flags.FlagFrom, args[0])
+			if err := cmd.Flags().Set(flags.FlagFrom, args[0]); err != nil {
+				return err
+			}
 
 			clientCtx, err := client.GetClientTxContext(cmd)
 			if err != nil {
diff --git a/x/builder/keeper/auction.go b/x/builder/keeper/auction.go
index d0774c33..c622d602 100644
--- a/x/builder/keeper/auction.go
+++ b/x/builder/keeper/auction.go
@@ -69,15 +69,25 @@ func (k Keeper) ValidateAuctionBid(ctx sdk.Context, bidder sdk.AccAddress, bid,
 			return err
 		}
 
+		if minBidIncrement.Denom != bid.Denom {
+			return fmt.Errorf("min bid increment denom (%s) does not match the bid denom (%s)", minBidIncrement, bid)
+		}
+
 		minBid := highestBid.Add(minBidIncrement)
 		if !bid.IsGTE(minBid) {
-			return fmt.Errorf("bid amount (%s) is less than the highest bid (%s) + min bid increment (%s)", bid, highestBid, minBidIncrement)
+			return fmt.Errorf(
+				"bid amount (%s) is less than the highest bid (%s) + min bid increment (%s); smallest acceptable bid is (%s)",
+				bid,
+				highestBid,
+				minBidIncrement,
+				minBid,
+			)
 		}
 	}
 
 	// ensure the bidder has enough funds to cover all the inclusion fees
-	balances := k.bankKeeper.GetAllBalances(ctx, bidder)
-	if !balances.IsAllGTE(sdk.NewCoins(bid)) {
+	balances := k.bankKeeper.GetBalance(ctx, bidder, bid.Denom)
+	if !balances.IsGTE(bid) {
 		return fmt.Errorf("insufficient funds to bid %s with balance %s", bid, balances)
 	}
 
@@ -114,7 +124,7 @@ func (k Keeper) ValidateAuctionBundle(bidder sdk.AccAddress, bundleSigners []map
 		// as long as all subsequent transactions are signed by the bidder.
 		if len(prevSigners) == 0 {
 			if seenBidder {
-				return fmt.Errorf("bundle contains transactions signed by multiple parties; possible front-running or sandwich attack")
+				return NewFrontRunningError()
 			}
 
 			seenBidder = true
@@ -122,7 +132,7 @@ func (k Keeper) ValidateAuctionBundle(bidder sdk.AccAddress, bundleSigners []map
 			filterSigners(prevSigners, txSigners)
 
 			if len(prevSigners) == 0 {
-				return fmt.Errorf("bundle contains transactions signed by multiple parties; possible front-running or sandwich attack")
+				return NewFrontRunningError()
 			}
 		}
 	}
diff --git a/x/builder/keeper/auction_test.go b/x/builder/keeper/auction_test.go
index 64fe69d2..b31700db 100644
--- a/x/builder/keeper/auction_test.go
+++ b/x/builder/keeper/auction_test.go
@@ -15,7 +15,7 @@ func (suite *KeeperTestSuite) TestValidateBidInfo() {
 	var (
 		// Tx building variables
 		accounts = []testutils.Account{} // tracks the order of signers in the bundle
-		balance  = sdk.NewCoins(sdk.NewCoin("foo", sdk.NewInt(10000)))
+		balance  = sdk.NewCoin("foo", sdk.NewInt(10000))
 		bid      = sdk.NewCoin("foo", sdk.NewInt(1000))
 
 		// Auction params
@@ -48,7 +48,7 @@ func (suite *KeeperTestSuite) TestValidateBidInfo() {
 			"insufficient balance",
 			func() {
 				bid = sdk.NewCoin("foo", sdk.NewInt(1000))
-				balance = sdk.NewCoins()
+				balance = sdk.NewCoin("foo", sdk.NewInt(100))
 			},
 			false,
 		},
@@ -57,7 +57,7 @@ func (suite *KeeperTestSuite) TestValidateBidInfo() {
 			func() {
 				// reset the balance and bid to their original values
 				bid = sdk.NewCoin("foo", sdk.NewInt(1000))
-				balance = sdk.NewCoins(sdk.NewCoin("foo", sdk.NewInt(10000)))
+				balance = sdk.NewCoin("foo", sdk.NewInt(10000))
 				accounts = testutils.RandomAccounts(rnd, int(maxBundleSize+1))
 			},
 			false,
@@ -141,6 +141,15 @@ func (suite *KeeperTestSuite) TestValidateBidInfo() {
 			},
 			false,
 		},
+		{
+			"min bid increment is different from bid denom", // THIS SHOULD NEVER HAPPEN
+			func() {
+				highestBid = sdk.NewCoin("foo", sdk.NewInt(500))
+				bid = sdk.NewCoin("foo", sdk.NewInt(1500))
+				minBidIncrement = sdk.NewCoin("foo2", sdk.NewInt(1000))
+			},
+			false,
+		},
 	}
 
 	for _, tc := range cases {
@@ -150,7 +159,7 @@ func (suite *KeeperTestSuite) TestValidateBidInfo() {
 			tc.malleate()
 
 			// 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().GetBalance(suite.ctx, bidder.Address, minBidIncrement.Denom).Return(balance).AnyTimes()
 			suite.bankKeeper.EXPECT().SendCoins(suite.ctx, bidder.Address, escrowAddress, reserveFee).Return(nil).AnyTimes()
 
 			suite.builderKeeper = keeper.NewKeeper(
diff --git a/x/builder/keeper/errors.go b/x/builder/keeper/errors.go
new file mode 100644
index 00000000..d319f80b
--- /dev/null
+++ b/x/builder/keeper/errors.go
@@ -0,0 +1,12 @@
+package keeper
+
+// FrontRunningError defines a custom error type for detecting front-running or sandwich attacks.
+type FrontRunningError struct{}
+
+func NewFrontRunningError() *FrontRunningError {
+	return &FrontRunningError{}
+}
+
+func (e FrontRunningError) Error() string {
+	return "bundle contains transactions signed by multiple parties; possible front-running or sandwich attack"
+}
diff --git a/x/builder/keeper/msg_server.go b/x/builder/keeper/msg_server.go
index fc7cfdb0..701e259e 100644
--- a/x/builder/keeper/msg_server.go
+++ b/x/builder/keeper/msg_server.go
@@ -33,31 +33,24 @@ func (m MsgServer) AuctionBid(goCtx context.Context, msg *types.MsgAuctionBid) (
 		return nil, err
 	}
 
-	// Ensure that the number of transactions is less than or equal to the maximum
-	// allowed.
-	maxBundleSize, err := m.GetMaxBundleSize(ctx)
+	params, err := m.GetParams(ctx)
 	if err != nil {
 		return nil, err
 	}
 
-	if uint32(len(msg.Transactions)) > maxBundleSize {
-		return nil, fmt.Errorf("the number of transactions in the bid is greater than the maximum allowed; expected <= %d, got %d", maxBundleSize, len(msg.Transactions))
+	if uint32(len(msg.Transactions)) > params.MaxBundleSize {
+		return nil, fmt.Errorf("the number of transactions in the bid is greater than the maximum allowed; expected <= %d, got %d", params.MaxBundleSize, len(msg.Transactions))
 	}
 
-	proposerFee, err := m.GetProposerFee(ctx)
-	if err != nil {
-		return nil, err
-	}
-
-	escrow, err := m.Keeper.GetEscrowAccount(ctx)
+	escrowAddress, err := sdk.AccAddressFromBech32(params.EscrowAccountAddress)
 	if err != nil {
 		return nil, err
 	}
 
 	var proposerReward sdk.Coins
-	if proposerFee.IsZero() {
+	if params.ProposerFee.IsZero() {
 		// send the entire bid to the escrow account when no proposer fee is set
-		if err := m.bankKeeper.SendCoins(ctx, bidder, escrow, sdk.NewCoins(msg.Bid)); err != nil {
+		if err := m.bankKeeper.SendCoins(ctx, bidder, escrowAddress, sdk.NewCoins(msg.Bid)); err != nil {
 			return nil, err
 		}
 	} else {
@@ -66,7 +59,7 @@ func (m MsgServer) AuctionBid(goCtx context.Context, msg *types.MsgAuctionBid) (
 
 		// determine the amount of the bid that goes to the (previous) proposer
 		bid := sdk.NewDecCoinsFromCoins(msg.Bid)
-		proposerReward, _ = bid.MulDecTruncate(proposerFee).TruncateDecimal()
+		proposerReward, _ = bid.MulDecTruncate(params.ProposerFee).TruncateDecimal()
 
 		if err := m.bankKeeper.SendCoins(ctx, bidder, sdk.AccAddress(prevProposer.GetOperator()), proposerReward); err != nil {
 			return nil, err
@@ -77,7 +70,7 @@ func (m MsgServer) AuctionBid(goCtx context.Context, msg *types.MsgAuctionBid) (
 		escrowTotal := bid.Sub(sdk.NewDecCoinsFromCoins(proposerReward...))
 		escrowReward, _ := escrowTotal.TruncateDecimal()
 
-		if err := m.bankKeeper.SendCoins(ctx, bidder, escrow, escrowReward); err != nil {
+		if err := m.bankKeeper.SendCoins(ctx, bidder, escrowAddress, escrowReward); err != nil {
 			return nil, err
 		}
 	}
diff --git a/x/builder/types/expected_keepers.go b/x/builder/types/expected_keepers.go
index 90c48a28..cd790611 100644
--- a/x/builder/types/expected_keepers.go
+++ b/x/builder/types/expected_keepers.go
@@ -13,7 +13,7 @@ type AccountKeeper interface {
 // BankKeeper defines the expected API contract for the x/bank module.
 type BankKeeper interface {
 	SendCoins(ctx sdk.Context, fromAddr sdk.AccAddress, toAddr sdk.AccAddress, amt sdk.Coins) error
-	GetAllBalances(ctx sdk.Context, addr sdk.AccAddress) sdk.Coins
+	GetBalance(ctx sdk.Context, addr sdk.AccAddress, denom string) sdk.Coin
 }
 
 // DistributionKeeper defines the expected API contract for the x/distribution
diff --git a/x/builder/types/msgs_test.go b/x/builder/types/msgs_test.go
index c0925d3a..acf141c4 100644
--- a/x/builder/types/msgs_test.go
+++ b/x/builder/types/msgs_test.go
@@ -148,6 +148,19 @@ func TestMsgUpdateParams(t *testing.T) {
 			},
 			expectPass: false,
 		},
+		{
+			description: "invalid message with min bid increment equal to 0",
+			msg: types.MsgUpdateParams{
+				Authority: sdk.AccAddress([]byte("test")).String(),
+				Params: types.Params{
+					ProposerFee:          sdk.NewDec(1),
+					EscrowAccountAddress: sdk.AccAddress([]byte("test")).String(),
+					ReserveFee:           sdk.NewCoin("test", sdk.NewInt(100)),
+					MinBidIncrement:      sdk.NewCoin("test", sdk.NewInt(0)),
+				},
+			},
+			expectPass: false,
+		},
 	}
 
 	for _, tc := range cases {
diff --git a/x/builder/types/params.go b/x/builder/types/params.go
index 0e8d0d72..1b7cf8cc 100644
--- a/x/builder/types/params.go
+++ b/x/builder/types/params.go
@@ -5,15 +5,16 @@ import (
 
 	"cosmossdk.io/math"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
 )
 
 var (
 	DefaultMaxBundleSize          uint32 = 2
-	DefaultEscrowAccountAddress   string
-	DefaultReserveFee             = sdk.Coin{}
-	DefaultMinBidIncrement        = sdk.Coin{}
-	DefaultFrontRunningProtection = true
-	DefaultProposerFee            = sdk.ZeroDec()
+	DefaultEscrowAccountAddress   string = authtypes.NewModuleAddress(ModuleName).String()
+	DefaultReserveFee                    = sdk.NewCoin("stake", sdk.NewInt(1))
+	DefaultMinBidIncrement               = sdk.NewCoin("stake", sdk.NewInt(1))
+	DefaultFrontRunningProtection        = true
+	DefaultProposerFee                   = sdk.ZeroDec()
 )
 
 // NewParams returns a new Params instance with the provided values.
@@ -58,6 +59,11 @@ func (p Params) Validate() error {
 		return fmt.Errorf("invalid minimum bid increment (%s)", err)
 	}
 
+	// Minimum bid increment must always be greater than 0.
+	if p.MinBidIncrement.IsLTE(sdk.NewCoin(p.MinBidIncrement.Denom, sdk.ZeroInt())) {
+		return fmt.Errorf("minimum bid increment cannot be zero")
+	}
+
 	denoms := map[string]struct{}{
 		p.ReserveFee.Denom:      {},
 		p.MinBidIncrement.Denom: {},
diff --git a/x/builder/types/tx.pb.go b/x/builder/types/tx.pb.go
index 0f902d11..224f734b 100644
--- a/x/builder/types/tx.pb.go
+++ b/x/builder/types/tx.pb.go
@@ -41,10 +41,10 @@ type MsgAuctionBid struct {
 	Bidder string `protobuf:"bytes,1,opt,name=bidder,proto3" json:"bidder,omitempty"`
 	// bid is the amount of coins that the bidder is bidding to participate in the
 	// auction.
-	Bid types.Coin `protobuf:"bytes,3,opt,name=bid,proto3" json:"bid"`
+	Bid types.Coin `protobuf:"bytes,2,opt,name=bid,proto3" json:"bid"`
 	// transactions are the bytes of the transactions that the bidder wants to
 	// bundle together.
-	Transactions [][]byte `protobuf:"bytes,4,rep,name=transactions,proto3" json:"transactions,omitempty"`
+	Transactions [][]byte `protobuf:"bytes,3,rep,name=transactions,proto3" json:"transactions,omitempty"`
 }
 
 func (m *MsgAuctionBid) Reset()         { *m = MsgAuctionBid{} }
@@ -242,40 +242,40 @@ func init() {
 func init() { proto.RegisterFile("pob/builder/v1/tx.proto", fileDescriptor_5cab4e3a4b082d0a) }
 
 var fileDescriptor_5cab4e3a4b082d0a = []byte{
-	// 528 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x84, 0x52, 0x4f, 0x6b, 0x13, 0x4f,
-	0x18, 0xce, 0x34, 0xfd, 0x05, 0x32, 0xbf, 0xa8, 0xb8, 0xb6, 0xe6, 0x4f, 0xed, 0x26, 0x2c, 0x48,
-	0x43, 0xa0, 0x3b, 0xa6, 0x96, 0x1e, 0x7a, 0xcb, 0x7a, 0x0e, 0xc8, 0x8a, 0x20, 0x5e, 0x64, 0x36,
-	0x3b, 0x4c, 0x07, 0xbb, 0x33, 0xcb, 0xce, 0x24, 0xb4, 0x37, 0xe9, 0xd1, 0x93, 0xe0, 0x17, 0xf0,
-	0xe8, 0x31, 0x07, 0xfd, 0x0e, 0x3d, 0x49, 0xd1, 0x83, 0x9e, 0x44, 0x12, 0x21, 0x7e, 0x0c, 0x99,
-	0xdd, 0xd9, 0x36, 0x1b, 0xc5, 0x5e, 0x42, 0xf6, 0x7d, 0x9e, 0xf7, 0x79, 0xdf, 0xe7, 0x99, 0x17,
-	0xd6, 0x63, 0x11, 0xa0, 0x60, 0xcc, 0x8e, 0x43, 0x92, 0xa0, 0x49, 0x1f, 0xa9, 0x13, 0x37, 0x4e,
-	0x84, 0x12, 0xd6, 0xcd, 0x58, 0x04, 0xae, 0x01, 0xdc, 0x49, 0xbf, 0xb5, 0x41, 0x05, 0x15, 0x29,
-	0x84, 0xf4, 0xbf, 0x8c, 0xd5, 0xba, 0x47, 0x85, 0xa0, 0xc7, 0x04, 0xe1, 0x98, 0x21, 0xcc, 0xb9,
-	0x50, 0x58, 0x31, 0xc1, 0xa5, 0x41, 0xed, 0x91, 0x90, 0x91, 0x90, 0x28, 0xc0, 0x92, 0xa0, 0x49,
-	0x3f, 0x20, 0x0a, 0xf7, 0xd1, 0x48, 0x30, 0x9e, 0x77, 0xaf, 0x0c, 0xa7, 0x84, 0x13, 0xc9, 0xf2,
-	0xee, 0x66, 0xd6, 0xfd, 0x22, 0x1b, 0x9a, 0x7d, 0x18, 0xa8, 0x6e, 0x84, 0x23, 0x49, 0x75, 0x5f,
-	0x24, 0xa9, 0x01, 0x6e, 0xe3, 0x88, 0x71, 0x81, 0xd2, 0xdf, 0xac, 0xe4, 0x7c, 0x02, 0xf0, 0xc6,
-	0x50, 0xd2, 0xc1, 0x78, 0xa4, 0x57, 0xf3, 0x58, 0x68, 0x3d, 0x80, 0x95, 0x80, 0x85, 0x21, 0x49,
-	0x1a, 0xa0, 0x03, 0xba, 0x55, 0xaf, 0xf1, 0xf9, 0xc3, 0xee, 0x86, 0xd1, 0x1f, 0x84, 0x61, 0x42,
-	0xa4, 0x7c, 0xa2, 0x12, 0xc6, 0xa9, 0x6f, 0x78, 0xd6, 0x01, 0x2c, 0x07, 0x2c, 0x6c, 0x94, 0x3b,
-	0xa0, 0xfb, 0xff, 0x5e, 0xd3, 0x35, 0x5c, 0x6d, 0xcb, 0x35, 0xb6, 0xdc, 0x47, 0x82, 0x71, 0xaf,
-	0x7a, 0xfe, 0xbd, 0x5d, 0x7a, 0xbf, 0x98, 0xf6, 0x80, 0xaf, 0x1b, 0x2c, 0x07, 0xd6, 0x54, 0x82,
-	0xb9, 0xc4, 0xe9, 0x6c, 0xd9, 0x58, 0xef, 0x94, 0xbb, 0x35, 0xbf, 0x50, 0x3b, 0x44, 0xbf, 0xde,
-	0xb5, 0x4b, 0x67, 0x8b, 0x69, 0xcf, 0x0c, 0x7b, 0xbd, 0x98, 0xf6, 0xb6, 0x74, 0x30, 0x27, 0x97,
-	0xd1, 0x14, 0xd6, 0x77, 0xea, 0x70, 0xb3, 0x50, 0xf0, 0x89, 0x8c, 0x05, 0x97, 0xc4, 0xf9, 0x08,
-	0xe0, 0xad, 0xa1, 0xa4, 0x4f, 0xe3, 0x10, 0x2b, 0xf2, 0x18, 0x27, 0x38, 0x92, 0xd6, 0x01, 0xac,
-	0xe2, 0xb1, 0x3a, 0x12, 0x09, 0x53, 0xa7, 0xd7, 0xda, 0xbd, 0xa2, 0x5a, 0xfb, 0xb0, 0x12, 0xa7,
-	0x0a, 0x8d, 0xb5, 0xd4, 0xf4, 0x5d, 0xb7, 0x78, 0x0f, 0x6e, 0xa6, 0xef, 0xad, 0x6b, 0xc7, 0xbe,
-	0xe1, 0x1e, 0xee, 0xe7, 0x5e, 0xae, 0x94, 0xb4, 0x9d, 0xed, 0x3f, 0xec, 0x2c, 0xef, 0xe8, 0x34,
-	0x61, 0x7d, 0xa5, 0x94, 0x5b, 0xda, 0xfb, 0x0a, 0x60, 0x79, 0x28, 0xa9, 0x25, 0x20, 0x5c, 0x7a,
-	0xc0, 0xed, 0xd5, 0x65, 0x0a, 0x79, 0xb4, 0xee, 0xff, 0x13, 0xbe, 0x8c, 0x6b, 0xeb, 0xec, 0xcb,
-	0xcf, 0xb7, 0x6b, 0x9b, 0xce, 0x1d, 0xb4, 0x72, 0x86, 0xfa, 0xe5, 0x9e, 0xc1, 0x5a, 0x21, 0xc7,
-	0xf6, 0x5f, 0x34, 0x97, 0x09, 0xad, 0x9d, 0x6b, 0x08, 0xf9, 0xd8, 0xd6, 0x7f, 0xaf, 0xf4, 0x7d,
-	0x78, 0x83, 0xf3, 0x99, 0x0d, 0x2e, 0x66, 0x36, 0xf8, 0x31, 0xb3, 0xc1, 0x9b, 0xb9, 0x5d, 0xba,
-	0x98, 0xdb, 0xa5, 0x6f, 0x73, 0xbb, 0xf4, 0x7c, 0x87, 0x32, 0x75, 0x34, 0x0e, 0xdc, 0x91, 0x88,
-	0x90, 0x7c, 0xc9, 0xe2, 0xdd, 0x88, 0x4c, 0x50, 0x31, 0x41, 0x75, 0x1a, 0x13, 0x19, 0x54, 0xd2,
-	0x03, 0x7f, 0xf8, 0x3b, 0x00, 0x00, 0xff, 0xff, 0x1f, 0x70, 0xfb, 0xc7, 0xc4, 0x03, 0x00, 0x00,
+	// 525 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x84, 0x52, 0xcf, 0x6b, 0x13, 0x41,
+	0x14, 0xce, 0x34, 0x1a, 0xc8, 0x18, 0x15, 0xd7, 0xd6, 0xfc, 0xa8, 0xdd, 0x84, 0x05, 0x69, 0x08,
+	0x74, 0xc7, 0xd4, 0xd2, 0x43, 0x6f, 0x59, 0xcf, 0x01, 0x59, 0x11, 0xc4, 0x8b, 0xcc, 0x66, 0x87,
+	0xe9, 0x60, 0x77, 0x66, 0xd9, 0x99, 0x84, 0xf6, 0x26, 0x3d, 0x7a, 0x12, 0xfc, 0x07, 0x3c, 0x7a,
+	0xcc, 0x41, 0xff, 0x87, 0x9e, 0xa4, 0xe8, 0x41, 0x4f, 0x22, 0x89, 0x10, 0xff, 0x0c, 0x99, 0xdd,
+	0xd9, 0x36, 0x1b, 0xc5, 0x5e, 0x42, 0xf6, 0x7d, 0xdf, 0xfb, 0xde, 0xfb, 0xbe, 0x79, 0xb0, 0x1e,
+	0x8b, 0x00, 0x05, 0x63, 0x76, 0x14, 0x92, 0x04, 0x4d, 0xfa, 0x48, 0x1d, 0xbb, 0x71, 0x22, 0x94,
+	0xb0, 0x6e, 0xc5, 0x22, 0x70, 0x0d, 0xe0, 0x4e, 0xfa, 0xad, 0x75, 0x2a, 0xa8, 0x48, 0x21, 0xa4,
+	0xff, 0x65, 0xac, 0xd6, 0x7d, 0x2a, 0x04, 0x3d, 0x22, 0x08, 0xc7, 0x0c, 0x61, 0xce, 0x85, 0xc2,
+	0x8a, 0x09, 0x2e, 0x0d, 0x6a, 0x8f, 0x84, 0x8c, 0x84, 0x44, 0x01, 0x96, 0x04, 0x4d, 0xfa, 0x01,
+	0x51, 0xb8, 0x8f, 0x46, 0x82, 0xf1, 0xbc, 0x7b, 0x65, 0x38, 0x25, 0x9c, 0x48, 0x96, 0x77, 0x37,
+	0xb3, 0xee, 0x97, 0xd9, 0xd0, 0xec, 0xc3, 0x40, 0x75, 0x23, 0x1c, 0x49, 0xaa, 0xfb, 0x22, 0x49,
+	0x0d, 0x70, 0x07, 0x47, 0x8c, 0x0b, 0x94, 0xfe, 0x66, 0x25, 0xe7, 0x33, 0x80, 0x37, 0x87, 0x92,
+	0x0e, 0xc6, 0x23, 0xbd, 0x9a, 0xc7, 0x42, 0xeb, 0x21, 0xac, 0x04, 0x2c, 0x0c, 0x49, 0xd2, 0x00,
+	0x1d, 0xd0, 0xad, 0x7a, 0x8d, 0x2f, 0x1f, 0x77, 0xd6, 0x8d, 0xfe, 0x20, 0x0c, 0x13, 0x22, 0xe5,
+	0x53, 0x95, 0x30, 0x4e, 0x7d, 0xc3, 0xb3, 0xf6, 0x61, 0x39, 0x60, 0x61, 0x63, 0xad, 0x03, 0xba,
+	0x37, 0x76, 0x9b, 0xae, 0xe1, 0x6a, 0x5b, 0xae, 0xb1, 0xe5, 0x3e, 0x16, 0x8c, 0x7b, 0xd5, 0xb3,
+	0x1f, 0xed, 0xd2, 0x87, 0xc5, 0xb4, 0x07, 0x7c, 0xdd, 0x60, 0x39, 0xb0, 0xa6, 0x12, 0xcc, 0x25,
+	0x4e, 0x67, 0xcb, 0x46, 0xb9, 0x53, 0xee, 0xd6, 0xfc, 0x42, 0xed, 0x00, 0xfd, 0x7e, 0xdf, 0x2e,
+	0x9d, 0x2e, 0xa6, 0x3d, 0x33, 0xec, 0xcd, 0x62, 0xda, 0xdb, 0xd4, 0xc1, 0x1c, 0x5f, 0x44, 0x53,
+	0x58, 0xdf, 0xa9, 0xc3, 0x8d, 0x42, 0xc1, 0x27, 0x32, 0x16, 0x5c, 0x12, 0xe7, 0x13, 0x80, 0xb7,
+	0x87, 0x92, 0x3e, 0x8b, 0x43, 0xac, 0xc8, 0x13, 0x9c, 0xe0, 0x48, 0x5a, 0xfb, 0xb0, 0x8a, 0xc7,
+	0xea, 0x50, 0x24, 0x4c, 0x9d, 0x5c, 0x69, 0xf7, 0x92, 0x6a, 0xed, 0xc1, 0x4a, 0x9c, 0x2a, 0x18,
+	0xd3, 0xf7, 0xdc, 0xe2, 0x3d, 0xb8, 0x99, 0xbe, 0x77, 0x4d, 0x3b, 0xf6, 0x0d, 0xf7, 0x60, 0x2f,
+	0xf7, 0x72, 0xa9, 0xa4, 0xed, 0x6c, 0xfd, 0x65, 0x67, 0x79, 0x47, 0xa7, 0x09, 0xeb, 0x2b, 0xa5,
+	0xdc, 0xd2, 0xee, 0x37, 0x00, 0xcb, 0x43, 0x49, 0x2d, 0x01, 0xe1, 0xd2, 0x03, 0x6e, 0xad, 0x2e,
+	0x53, 0xc8, 0xa3, 0xf5, 0xe0, 0xbf, 0xf0, 0x45, 0x5c, 0x9b, 0xa7, 0x5f, 0x7f, 0xbd, 0x5b, 0xdb,
+	0x70, 0xee, 0xa2, 0x95, 0x33, 0xd4, 0x2f, 0xf7, 0x1c, 0xd6, 0x0a, 0x39, 0xb6, 0xff, 0xa1, 0xb9,
+	0x4c, 0x68, 0x6d, 0x5f, 0x41, 0xc8, 0xc7, 0xb6, 0xae, 0xbf, 0xd6, 0xf7, 0xe1, 0x0d, 0xce, 0x66,
+	0x36, 0x38, 0x9f, 0xd9, 0xe0, 0xe7, 0xcc, 0x06, 0x6f, 0xe7, 0x76, 0xe9, 0x7c, 0x6e, 0x97, 0xbe,
+	0xcf, 0xed, 0xd2, 0x8b, 0x6d, 0xca, 0xd4, 0xe1, 0x38, 0x70, 0x47, 0x22, 0x42, 0xf2, 0x15, 0x8b,
+	0x77, 0x22, 0x32, 0x41, 0xc5, 0x04, 0xd5, 0x49, 0x4c, 0x64, 0x50, 0x49, 0x0f, 0xfc, 0xd1, 0x9f,
+	0x00, 0x00, 0x00, 0xff, 0xff, 0xf0, 0xeb, 0xfe, 0x5c, 0xc4, 0x03, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -426,7 +426,7 @@ func (m *MsgAuctionBid) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 			copy(dAtA[i:], m.Transactions[iNdEx])
 			i = encodeVarintTx(dAtA, i, uint64(len(m.Transactions[iNdEx])))
 			i--
-			dAtA[i] = 0x22
+			dAtA[i] = 0x1a
 		}
 	}
 	{
@@ -438,7 +438,7 @@ func (m *MsgAuctionBid) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i = encodeVarintTx(dAtA, i, uint64(size))
 	}
 	i--
-	dAtA[i] = 0x1a
+	dAtA[i] = 0x12
 	if len(m.Bidder) > 0 {
 		i -= len(m.Bidder)
 		copy(dAtA[i:], m.Bidder)
@@ -667,7 +667,7 @@ func (m *MsgAuctionBid) Unmarshal(dAtA []byte) error {
 			}
 			m.Bidder = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
-		case 3:
+		case 2:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Bid", wireType)
 			}
@@ -700,7 +700,7 @@ func (m *MsgAuctionBid) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
-		case 4:
+		case 3:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Transactions", wireType)
 			}