idempotency

const { pool } = require('./db');

async function recordEvent(client, { eventId, type, payload }) {
  const { rows } = await client.query(
    `INSERT INTO webhook_events (event_id, type, payload, status)
     VALUES ($1, $2, $3, 'received')

class LikesController < ApplicationController
  before_action :set_post

  def create
    @like = @post.likes.find_or_create_by(user: current_user)