add/remove reactions to all discord messages in channel

var channelId = '920994048523788319';

// берём из любого запроса
var authorization = 'NDY1MTk1MTc5Mjk3NjAzNTg0.YZzAEw.O1Hr7eACh2wO3b43tZJ4sYESc3c';

// @NOTE: запрашиваем сообщения треда
var messages = await fetch(`https://discord.com/api/v9/channels/${channelId}/messages?limit=100`, {
  headers: {
    authorization,
  },
}).then(r => r.json());

// '👀'
var reactions = ['✅', '❎']

async function addReactions(messages, reactions) {
  for (var message of messages) {
    for (var reaction of reactions) {
      await fetch(`https://discord.com/api/v9/channels/${channelId}/messages/${message.id}/reactions/${encodeURIComponent(`${reaction}/@me`)}`, {
        headers: {
          authorization,
        },
        method: 'PUT',
      }).then(r => r.text())
      await new Promise(resolve => setTimeout(resolve, 300))
    }
  }
}

async function removeReactions(messages, reactions) {
  for (var message of messages) {
    for (var reaction of reactions) {
      await fetch(`https://discord.com/api/v9/channels/${channelId}/messages/${message.id}/reactions/${encodeURIComponent(`${reaction}/@me`)}`, {
        headers: {
          authorization,
        },
        method: 'DELETE',
      }).then(r => r.text())
      await new Promise(resolve => setTimeout(resolve, 300))
    }
  }
}

// @NOTE: добавить выбранные реакции ко всем сообщениям
await addReactions(messages, reactions);

// @NOTE: удалить выбранные реакции для всех сообщений
await removeReactions(messages, reactions);