Reaction Role with Discord.py

I want to make my bot creating an embed and add some emoji that when you press, them give you a role. I also want to do that when the bot restart, I don't need to restart the embed too, you know.

If you don't really understand, please ask in the comment

Solution

This is how you can add reaction to a message:

msg = await ctx.send(embed=embed)
    await msg.add_reaction("🧠")

And this is how you handle reaction roles:

@bot.event
async def on_raw_reaction_add(payload):
    if payload.message_id == THE_ID_OF_YOUR_MESSAGE:
        guild = bot.get_guild(payload.guild_id)
        member = guild.get_member(payload.user_id)
        if str(payload.emoji) == "🧠":
            role = discord.utils.get(guild.roles, name=ROLE_NAME)
            await member.add_roles(role)

@bot.event
async def on_raw_reaction_remove(payload):
    if payload.message_id == THE_ID_OF_YOUR_MESSAGE:
        guild = bot.get_guild(payload.guild_id)
        member = guild.get_member(payload.user_id)
        if str(payload.emoji) == "🧠":
            role = discord.utils.get(guild.roles, name=ROLE_NAME)
            await member.remove_roles(role)

This one works even after the bot was restarted.

Paste the role's name that you want to give on reaction instead of ROLE_NAME

Change THE_ID_OF_YOUR_MESSAGE to the id of the message that you reacted to with the bot before.