Leveraging async() functions within eval() - discord.js

  • I recently attempted to utilize the eval command in my bot with the use of 'await'. However, since await is only valid in async functions, I created a new command called aeval.
  • The issue I am facing is that the aeval command is returning undefined for all evaluations.
const { Base } = require("../../../lib/base");
const { inspect } = require("util");

module.exports = new Base({
    name: "aeval",
    description: "This command is exclusively for owners to evaluate asynchronous JavaScript code",
    async execute({ client, message, args }) {
        let script = args.join(" ");
        let evaled;
        let hrDiff;
        try {
            const hrTime = process.hrtime();
            evaled = await eval(`(async() => {${script}})()`);
            hrDiff = process.hrtime(hrTime);
            evaled = inspect(evaled);
            await message.reply(
                `Executed in \`${hrDiff[1] / 1000000}\` ms.\n\`\`\`js\n${inspect(
                    evaled
                )}\n\`\`\``
            );
        } catch (error) {
            console.log(error);
            message.reply(`An error occurred:\n\`\`\`js\n${error}\n\`\`\``);
        }
    },
});

Answer №1

If you want to give it a shot, here's a different approach:

evaled = await eval('async () => code')()

By placing the function outside of the eval, you can effectively execute it in an asynchronous setting.

However, it is important to note that relying on eval is risky as it opens up potential vulnerabilities for malicious attacks such as compromising your server or manipulating crucial data. Exercise extreme caution and explore alternative methods for executing necessary server management tasks.

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