Why does the bot give the role to itself?

Question

Node.js

I wrote a bot that gives out roles by reaction. Everything works, but the bot gives the role to itself, and not to the one who put the reaction to his message.

const config = require('./config.json');
const Discord = require('discord.js');
const prefix = config.prefix;
var en1 = "1️⃣";
rn1 = ["817391471765356554"];
en2 = "2️⃣";
rn2 = ["817391475137708072"];
en3 = "3️⃣";
rn3 = ["817391477801222235"];
en4 = "4️⃣";
rn4 = ["817391485615603802"];

function role(robot, message, args) {
    if (message.content === `?role`)
        message.channel.send('Чтобы выбрать роль, нажмите на реакцию под сообщением. 1️⃣ , если вы учитесь на первом курсе. 2️⃣ если вы учитесь на втором курсе. 3️⃣ если вы учитесь на третьем курсе. 4️⃣ если вы учитесь на четвёртом курсе.').then(sentMessage => {
            sentMessage.react(`1️⃣`)
            sentMessage.react(`2️⃣`)
            sentMessage.react(`3️⃣`)
            sentMessage.react(`4️⃣`)
        })
}
exports.exec = (robot) => {
    robot.on("ready", () => {
        console.log(`Logged in as ${client.user.tag}`)
    });
    robot.on("message", e => {
        if (e.content.startsWith(prefix + "reaction")) {
            if (!e.channel.guild) return;
            for (let o in en1) {
                var n = [e.guild.emojis.find(e => e.name == en1[o])];
                for (let o in n) e.react(n[o])
            }
        }
    });

    robot.on("messageReactionAdd", (e, n) => {
        if (n && !n.bot && e.message.channel.guild) {
            for (let o in en1)
                if (e.emoji.name === en1) {
                    e.message.member.roles.add('817391471765356554');
                } else if (e.emoji.name === en2) {
                e.message.member.roles.add('817391475137708072');
            } else if (e.emoji.name === en3) {
                e.message.member.roles.add('817391477801222235');
            } else if (e.emoji.name === en4) {
                e.message.member.roles.add('817391485615603802');
            }
        }
    });
    robot.on("messageReactionRemove", (e, n) => {
        if (n && !n.bot && e.message.channel.guild) {
            for (let o in en1)
                if (e.emoji.name === en1) {
                    e.message.member.roles.remove('817391471765356554');
                }
            else if (e.emoji.name === en2) {
                e.message.member.roles.remove('817391475137708072');
            } else if (e.emoji.name === en3) {
                e.message.member.roles.remove('817391477801222235');
            } else if (e.emoji.name === en4) {
                e.message.member.roles.remove('817391485615603802');
            }
        }
    });



    var comms_list = [{
        name: "role",
        out: role,
        about: "выдача роли"
    }];

    module.exports.comms = comms_list;
}

Answer 1

the problem is here:

e.message.member.roles.add('817391471765356554');

e.message.member.roles.remove('817391475137708072');

the function .on(), upon detecting the name of the event (messageReactionAdd/Remove), automatically "assigns" the type of the class MessageReaction to the first parameter , and the type of the User class to the second .
the first parameter is called e, the second - n(I strongly advise against using such single-letter names).
well, we go along the chain:
1) you access the parameter e, which has the class type MessageReaction (e)
2) the MessageReaction class has a message property , which in a specific case is the message on which the delivered reaction was detected
(e.message)
further, you simply specify one of the properties of the Message class - member , which currently, in a simple way, contains a bot.