diff --git a/app/app.go b/app/app.go
index 1183bd5b..69f70893 100644
--- a/app/app.go
+++ b/app/app.go
@@ -626,7 +626,7 @@ func NewEthermintApp(
 		FeegrantKeeper:   app.FeeGrantKeeper,
 		FeeMarketKeeper:  app.FeeMarketKeeper,
 		SignModeHandler:  encodingConfig.TxConfig.SignModeHandler(),
-		SigGasConsumer:   authmiddleware.DefaultSigVerificationGasConsumer,
+		SigGasConsumer:   middleware.DefaultSigVerificationGasConsumer,
 		MaxTxGasWanted:   maxGasWanted,
 		TxDecoder:        encodingConfig.TxConfig.TxDecoder(),
 	}
@@ -646,7 +646,6 @@ func (app *EthermintApp) setTxHandler(options middleware.HandlerOptions, txConfi
 	if err != nil {
 		panic(err)
 	}
-
 	app.SetTxHandler(txHandler)
 }
 
diff --git a/app/middleware/middleware.go b/app/middleware/middleware.go
index e9a0d883..430496be 100644
--- a/app/middleware/middleware.go
+++ b/app/middleware/middleware.go
@@ -3,30 +3,158 @@ package middleware
 import (
 	context "context"
 
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 	"github.com/cosmos/cosmos-sdk/types/tx"
+	"github.com/cosmos/cosmos-sdk/types/tx/signing"
+	authante "github.com/cosmos/cosmos-sdk/x/auth/middleware"
+	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
+	"github.com/tharsis/ethermint/crypto/ethsecp256k1"
+)
+
+const (
+	secp256k1VerifyCost uint64 = 21000
 )
 
 type MD struct {
-	next tx.Handler
+	ethMiddleware    tx.Handler
+	cosmosMiddleware tx.Handler
+	cosmoseip792     tx.Handler
 }
 
 var _ tx.Handler = MD{}
 
 func NewMiddleware(indexEventsStr []string, options HandlerOptions) (tx.Handler, error) {
-	return newEthAuthMiddleware(options)
+	ethMiddleware, err := newEthAuthMiddleware(options)
+	if err != nil {
+		return nil, err
+	}
+	cosmoseip792, err := newCosmosAnteHandlerEip712(options)
+	if err != nil {
+		return nil, err
+	}
+	cosmosMiddleware, err := newCosmosAuthMiddleware(options)
+	if err != nil {
+		return nil, err
+	}
+	return MD{
+		ethMiddleware:    ethMiddleware,
+		cosmosMiddleware: cosmosMiddleware,
+		cosmoseip792:     cosmoseip792,
+	}, nil
 }
 
 // CheckTx implements tx.Handler
 func (md MD) CheckTx(ctx context.Context, req tx.Request, checkReq tx.RequestCheckTx) (tx.Response, tx.ResponseCheckTx, error) {
-	return md.next.CheckTx(ctx, req, checkReq)
+	var anteHandler tx.Handler
+	reqTx := req.Tx
+	txWithExtensions, ok := reqTx.(authante.HasExtensionOptionsTx)
+	if ok {
+		opts := txWithExtensions.GetExtensionOptions()
+		if len(opts) > 0 {
+			switch typeURL := opts[0].GetTypeUrl(); typeURL {
+			case "/ethermint.evm.v1.ExtensionOptionsEthereumTx":
+				// handle as *evmtypes.MsgEthereumTx
+				anteHandler = md.ethMiddleware
+			case "/ethermint.types.v1.ExtensionOptionsWeb3Tx":
+				// handle as normal Cosmos SDK tx, except signature is checked for EIP712 representation
+				anteHandler = md.cosmoseip792
+			default:
+				return tx.Response{}, tx.ResponseCheckTx{}, sdkerrors.Wrapf(
+					sdkerrors.ErrUnknownExtensionOptions,
+					"rejecting tx with unsupported extension option: %s", typeURL,
+				)
+			}
+
+			return anteHandler.CheckTx(ctx, req, checkReq)
+		}
+	}
+
+	// // handle as totally normal Cosmos SDK tx
+	// _, ok = reqTx.(sdk.Tx)
+	// if !ok {
+	// 	return tx.Response{}, tx.ResponseCheckTx{}, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", reqTx)
+	// }
+
+	anteHandler = md.cosmosMiddleware
+
+	return anteHandler.CheckTx(ctx, req, checkReq)
 }
 
 // DeliverTx implements tx.Handler
 func (md MD) DeliverTx(ctx context.Context, req tx.Request) (tx.Response, error) {
-	return md.next.DeliverTx(ctx, req)
+	var anteHandler tx.Handler
+	reqTx := req.Tx
+	txWithExtensions, ok := reqTx.(authante.HasExtensionOptionsTx)
+	if ok {
+		opts := txWithExtensions.GetExtensionOptions()
+		if len(opts) > 0 {
+			switch typeURL := opts[0].GetTypeUrl(); typeURL {
+			case "/ethermint.evm.v1.ExtensionOptionsEthereumTx":
+				// handle as *evmtypes.MsgEthereumTx
+				anteHandler = md.ethMiddleware
+			case "/ethermint.types.v1.ExtensionOptionsWeb3Tx":
+				// handle as normal Cosmos SDK tx, except signature is checked for EIP712 representation
+				anteHandler = md.cosmoseip792
+			default:
+				return tx.Response{}, sdkerrors.Wrapf(
+					sdkerrors.ErrUnknownExtensionOptions,
+					"rejecting tx with unsupported extension option: %s", typeURL,
+				)
+			}
+
+			return anteHandler.DeliverTx(ctx, req)
+		}
+	}
+
+	anteHandler = md.cosmosMiddleware
+	return anteHandler.DeliverTx(ctx, req)
 }
 
 // SimulateTx implements tx.Handler
 func (md MD) SimulateTx(ctx context.Context, req tx.Request) (tx.Response, error) {
-	return md.next.SimulateTx(ctx, req)
+	var anteHandler tx.Handler
+	reqTx := req.Tx
+	txWithExtensions, ok := reqTx.(authante.HasExtensionOptionsTx)
+	if ok {
+		opts := txWithExtensions.GetExtensionOptions()
+		if len(opts) > 0 {
+			switch typeURL := opts[0].GetTypeUrl(); typeURL {
+			case "/ethermint.evm.v1.ExtensionOptionsEthereumTx":
+				// handle as *evmtypes.MsgEthereumTx
+				anteHandler = md.ethMiddleware
+			case "/ethermint.types.v1.ExtensionOptionsWeb3Tx":
+				// handle as normal Cosmos SDK tx, except signature is checked for EIP712 representation
+				anteHandler = md.cosmoseip792
+			default:
+				return tx.Response{}, sdkerrors.Wrapf(
+					sdkerrors.ErrUnknownExtensionOptions,
+					"rejecting tx with unsupported extension option: %s", typeURL,
+				)
+			}
+
+			return anteHandler.SimulateTx(ctx, req)
+		}
+	}
+
+	anteHandler = md.cosmosMiddleware
+	return anteHandler.SimulateTx(ctx, req)
+}
+
+var _ authante.SignatureVerificationGasConsumer = DefaultSigVerificationGasConsumer
+
+// DefaultSigVerificationGasConsumer is the default implementation of SignatureVerificationGasConsumer. It consumes gas
+// for signature verification based upon the public key type. The cost is fetched from the given params and is matched
+// by the concrete type.
+func DefaultSigVerificationGasConsumer(
+	meter sdk.GasMeter, sig signing.SignatureV2, params authtypes.Params,
+) error {
+	// support for ethereum ECDSA secp256k1 keys
+	_, ok := sig.PubKey.(*ethsecp256k1.PubKey)
+	if ok {
+		meter.ConsumeGas(secp256k1VerifyCost, "ante verify: eth_secp256k1")
+		return nil
+	}
+
+	return authante.DefaultSigVerificationGasConsumer(meter, sig, params)
 }