chore: address the pr comments

app/middleware/eth.go

@@ -1,7 +1,7 @@
 package middleware
 
 import (
-	context "context"
+	"context"
 	"errors"
 	"math/big"
 

app/middleware/eth_test.go

@@ -16,10 +16,6 @@ import (
 	ethtypes "github.com/ethereum/go-ethereum/core/types"
 )
 
-func nextFn(ctx sdk.Context, _ sdk.Tx, _ bool) (sdk.Context, error) {
-	return ctx, nil
-}
-
 func (suite MiddlewareTestSuite) TestEthSigVerificationDecorator() {
 	txHandler := middleware.ComposeMiddlewares(noopTxHandler, ante.NewEthSigVerificationMiddleware(suite.app.EvmKeeper))
 	addr, privKey := tests.NewAddrKey()
@@ -288,26 +284,22 @@ func (suite MiddlewareTestSuite) TestEthGasConsumeDecorator() {
 			if tc.expPanic {
 				suite.Require().Panics(func() {
 					_, _, _ = txHandler.CheckTx(sdk.WrapSDKContext(suite.ctx.WithIsCheckTx(true).WithGasMeter(sdk.NewGasMeter(1))), txtypes.Request{Tx: tc.tx}, txtypes.RequestCheckTx{})
-
 				})
 				return
 			}
 
 			_, _, err := txHandler.CheckTx(sdk.WrapSDKContext(suite.ctx.WithIsCheckTx(true).WithGasMeter(sdk.NewInfiniteGasMeter())), txtypes.Request{Tx: tc.tx}, txtypes.RequestCheckTx{})
 
-			// ctx, err := t.AnteHandle(suite.ctx.WithIsCheckTx(true).WithGasMeter(sdk.NewInfiniteGasMeter()), tc.tx, false, nextFn)
 			if tc.expPass {
 				suite.Require().NoError(err)
 			} else {
 				suite.Require().Error(err)
 			}
-			// suite.Require().Equal(tc.gasLimit, ctx.GasMeter().Limit())
 		})
 	}
 }
 
 func (suite MiddlewareTestSuite) TestCanTransferDecorator() {
-	// dec := ante.NewCanTransferMiddleware(suite.app.EvmKeeper)
 	txHandler := middleware.ComposeMiddlewares(noopTxHandler, ante.NewCanTransferMiddleware(suite.app.EvmKeeper))
 
 	addr, privKey := tests.NewAddrKey()

app/middleware/middleware.go

@@ -1,7 +1,7 @@
 package middleware
 
 import (
-	context "context"
+	"context"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
@@ -66,10 +66,7 @@ func (txh txRouter) route(req tx.Request) (tx.Handler, error) {
 			return next, nil
 		}
 	}
-	// // handle as totally normal Cosmos SDK tx
-	// if _, ok = reqTx.(sdk.Tx); !ok {
-	// 	return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "invalid transaction type: %T", reqTx)
-	// }
+	// handle as totally normal Cosmos SDK tx
 	return txh.cosmos, nil
 }
 
@@ -100,7 +97,7 @@ func (txh txRouter) SimulateTx(ctx context.Context, req tx.Request) (res tx.Resp
 	return next.SimulateTx(ctx, req)
 }
 
-var _ authmiddleware.SignatureVerificationGasConsumer = DefaultSigVerificationGasConsumer
+var _ = 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