fixed self sending TRX issue

api/gateway/chain/internal/service/gateway/rpcclient/clients.go

@@ -2,6 +2,7 @@ package rpcclient
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
@@ -175,11 +176,16 @@ func (l *loggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, erro
 	respFields := append(fields,
 		zap.Int("status_code", resp.StatusCode),
 	)
+	if contentType := strings.TrimSpace(resp.Header.Get("Content-Type")); contentType != "" {
+		respFields = append(respFields, zap.String("content_type", contentType))
+	}
 	if len(bodyBytes) > 0 {
 		respFields = append(respFields, zap.String("rpc_response", truncate(string(bodyBytes), 2048)))
 	}
 	if resp.StatusCode >= 400 {
 		l.logger.Warn("RPC response error", respFields...)
+	} else if len(bodyBytes) > 0 && !json.Valid(bodyBytes) {
+		l.logger.Warn("RPC response invalid JSON", respFields...)
 	}
 
 	return resp, nil