remove tip when null

build.sh

@@ -0,0 +1 @@
+go build -C cmd/cosmos-signer -o ../../build/cosmos-signer

cmd/cosmos-signer/cmd/root.go

@@ -1,6 +1,8 @@
 package cmd
 
 import (
+	"encoding/json"
+	"io"
 	"os"
 	"strings"
 
@@ -33,6 +35,59 @@ const (
 	flagPrefixPublic = "prefix-pub"
 )
 
+// FilterNullValJSON implements the io.Writer interface
+type FilterNullValJSON struct {
+	Output   io.Writer
+	NullKeys []string
+}
+
+func (w *FilterNullValJSON) Write(p []byte) (n int, err error) {
+	var data interface{}
+	if err := json.Unmarshal(p, &data); err != nil {
+		return 0, err
+	}
+	filteredData := filterNullValues(data, w.NullKeys)
+	filteredBytes, err := json.Marshal(filteredData)
+	if err != nil {
+		return 0, err
+	}
+	return w.Output.Write(filteredBytes)
+}
+
+// filterNullValues recursively filters out null values from JSON for specified keys
+func filterNullValues(data interface{}, nullKeys []string) interface{} {
+	switch v := data.(type) {
+	case map[string]interface{}:
+		for key, val := range v {
+			if shouldCheckKey(key, nullKeys) {
+				if val == nil {
+					delete(v, key) // Delete key with null value if shouldPrint is true
+				} else {
+					v[key] = filterNullValues(val, nullKeys)
+				}
+			}
+		}
+		return v
+	case []interface{}:
+		for i := range v {
+			v[i] = filterNullValues(v[i], nullKeys)
+		}
+		return v
+	default:
+		return v
+	}
+}
+
+// shouldCheckKey checks if the key is one of the specified keys to check
+func shouldCheckKey(key string, nullKeys []string) bool {
+	for _, k := range nullKeys {
+		if key == k {
+			return true
+		}
+	}
+	return false
+}
+
 // NewRootCmd creates a new root command for cosmos-signer. It is called once in the main function.
 func NewRootCmd() *cobra.Command {
 
@@ -49,7 +104,11 @@ func NewRootCmd() *cobra.Command {
 		SilenceErrors: true,
 		PersistentPreRunE: func(cmd *cobra.Command, _ []string) error {
 			// set the default command outputs
-			cmd.SetOut(cmd.OutOrStdout())
+			w := &FilterNullValJSON{
+				Output:   cmd.OutOrStdout(),
+				NullKeys: []string{"tips"},
+			}
+			cmd.SetOut(w)
 			cmd.SetErr(cmd.ErrOrStderr())
 
 			clientCtx = clientCtx.WithCmdContext(cmd.Context())