index.js

require('dotenv').config()
const { Client, GatewayIntentBits } = require('discord.js')
const client = new Client({
  intents: [
    GatewayIntentBits.Guilds,
    GatewayIntentBits.GuildMessages,
    GatewayIntentBits.MessageContent,
  ],
})
const { Configuration, OpenAIApi } = require('openai')
const configuration = new Configuration({
  apiKey: process.env.OPENAI_API_KEY,
})
client.once('ready', () => {
  console.log('Bot Start & Login Successful!')
})
const openai = new OpenAIApi(configuration)
let prompt
client.on('messageCreate', function (message) {
  if (message.author.bot) return
  prompt += `You: ${message.content}\n`
  ;(async () => {
    const gptResponse = await openai.createCompletion({
      model: 'text-davinci-002',
      prompt: prompt,
      max_tokens: 3000,
      temperature: 0.3,
      top_p: 0.3,
      presence_penalty: 0,
      frequency_penalty: 0.5,
    })
    if (message.channel.id == 'INPUT_YOUR_CHANNEL_ID') {
      message.reply(`${gptResponse.data.choices[0].text.substring(0)}`)
      console.log('Answer Reply!')
      prompt += `${gptResponse.data.choices[0].text}\n`
    } else {
      prompt += `${gptResponse.data.choices[0].text}\n`
    }
  })()
})
client.login(process.env.DISCORD_BOT_TOKEN)