evm: improve error message for invalid account (#883)

* evm: improve error message for invalid account

* fix

x/evm/types/errors.go

@@ -32,6 +32,7 @@ const (
 	codeErrInvalidGasCap
 	codeErrInvalidBaseFee
 	codeErrGasOverflow
+	codeErrInvalidAccount
 )
 
 var ErrPostTxProcessing = errors.New("failed to execute post processing")
@@ -93,6 +94,9 @@ var (
 
 	// ErrGasOverflow returns an error if gas computation overlow/underflow
 	ErrGasOverflow = sdkerrors.Register(ModuleName, codeErrGasOverflow, "gas computation overflow/underflow")
+
+	// ErrInvalidAccount returns an error if the account is not an EVM compatible account
+	ErrInvalidAccount = sdkerrors.Register(ModuleName, codeErrInvalidAccount, "account type is not a valid ethereum account")
 )
 
 // NewExecErrorWithReason unpacks the revert return bytes and returns a wrapped error