Update GetCmdIssueDenom to allow schema flag be file path (#78)

* update GetCmdIssueDenom to allow schema flag be file path

* update schema flag

Co-authored-by: 王迪 <wangdi@bianjie.ai>

modules/nft/client/cli/tx.go

@@ -2,6 +2,7 @@ package cli
 
 import (
 	"fmt"
+	"io/ioutil"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -45,7 +46,7 @@ func GetCmdIssueDenom() *cobra.Command {
 			"$ %s tx nft issue <denom-id> "+
 				"--from=<key-name> "+
 				"--name=<denom-name> "+
-				"--schema=<schema> "+
+				"--schema=<schema-content or path to schema.json> "+
 				"--chain-id=<chain-id> "+
 				"--fees=<fee>",
 			version.AppName,
@@ -65,6 +66,10 @@ func GetCmdIssueDenom() *cobra.Command {
 			if err != nil {
 				return err
 			}
+			optionsContent, err := ioutil.ReadFile(schema)
+			if err == nil {
+				schema = string(optionsContent)
+			}
 
 			msg := types.NewMsgIssueDenom(
 				args[0],