...

client/tx/query.go

@@ -8,7 +8,6 @@ import (
 	"strconv"
 
 	"github.com/gorilla/mux"
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	abci "github.com/tendermint/abci/types"
@@ -25,10 +24,8 @@ func QueryTxCmd(cdc *wire.Codec) *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "tx [hash]",
 		Short: "Matches this txhash over all committed blocks",
+		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			if len(args) != 1 || len(args[0]) == 0 {
-				return errors.New("You must provide a tx hash")
-			}
 
 			// find the key to look up the account
 			hashHexStr := args[0]