This afternoon Affirm, a startup focused on providing point-of-sale credit to consumers making online purchases, announced that it has filed to go public. The filing is confidential, so there’s little to be gleaned about the company’s performance from the news. That Affirm was exploring a public offering was reported by the Wall Street Journal back in July. In the aftermath of that news, TechCrunch tried to understand the valuation that Affirm was said to be targeting in its debut, which we placed at as much as $10 billion. Affirm has…