In a discussion about payment requests, Ross Nicoll expressed caution regarding the security implications of embedding files into the payment request. He noted that even file formats that are presumed safe, such as images, have had security issues in the past. Mike Hearn responded by pointing out that PaymentRequests are limited to 50,000 bytes and that he couldn't think of a reason why payment messages would need to be any bigger than that.Ross suggested embedding the PaymentRequest directly into web pages via the