问题

Here's the translated code portion:

假设我有以下代码：

```javascript
import { Telegraf } from "telegraf";
const bot = new Telegraf(process.env.BOT_TOKEN || "");

bot.on("text", async (ctx) => {
  console.log(ctx.message?.text);
});

在这里，ctx 参数具有一个长而奇怪的类型，可以访问许多属性。

现在，我想将其更改为使用类型 AnStrangeType 的处理函数：

async function handleMessage(ctx: AnStrangeType): Promise<void> {
  console.log(ctx.message?.text);
}
bot.on("text", handleMessage);

是否有一种方式可以实现处理函数的参数的类型继承？

<details>
<summary>英文:</summary>

Assume I have this code:

import { Telegraf } from "telegraf";
const bot = new Telegraf(process.env.BOT_TOKEN || "");

bot.on(message("text"), async (ctx) => {
console.log(ctx.message?.text);
});

Here, the `ctx` parameter has an long and strange type that gives me lots of props accessible.

Now, I want to change it to have a handler function without using the type `AnStrangeType`:

async function handleMessage(ctx: AnStrangeType): Promise<void> {
console.log(ctx.message?.text);
}
bot.on(message("text"), handleMessage);

is there any way to have something like type inheritance for the arguments of the handler function?

</details>


# 答案1
**得分**: 1

```ts
import { Telegraf } from "telegraf";
const bot = new Telegraf(process.env.BOT_TOKEN || "");

bot.on('message', async (ctx) => {
    console.log(ctx.message?.text);
});

// 选取所需的通用调用。
// 这里可能需要 `<typeof message("text")>` 的通用类型，我不知道 `message` 函数是什么
type call = typeof bot.on<'message'>
// 第二个参数是你要找的函数
type arg = Parameters<call>[1]
// 创建该类型的变量
const handleMessage: arg = async (ctx) => {
    console.log(ctx.message?.text);
}

import { Telegraf } from "telegraf";
const bot = new Telegraf(process.env.BOT_TOKEN || "");

bot.on('message', async (ctx) => {
    console.log(ctx.message?.text);
});

// pick the selected generic call.
// You may need `<typeof message("text")>` generic here, I dunno what's `message` function
type call = typeof bot.on<'message'>
// 2nd arg is the function you are looking for
type arg = Parameters<call>[1]
// make a variable of that type
const handleMessage: arg = async (ctx) => {
    console.log(ctx.message?.text);
}