我这边有两个方法是无效的,照ios Demo 写的,无法取消支付和授权回购无效(加签方法是什么),能告诉我怎么处理了

activity.runOnUiThread {
                    context.post {
                        val text = "Canceled"
                        val callback = "window.ethereum.sendError(${obj["id"] as Long},\"$text\")"
                        context.evaluateJavascript(callback) { value ->
                            println(value)
                        }
                    }
                }