A QR code connects multiple payment pathways, but stablecoin payments still require the invoice step. Altitude demonstrates the X9.150 solution, focusing on how payment requests are reliably interpreted. ① On October 19, Altitude introduced on X a QR code payment demo based on X9.150: linking different settlement pathways—such as FedNow, RTP, or Solana USDC—to the same payment request. ② Its product demonstration illustrates the workflow: identifying a signed request, verifying its content, obtaining user confirmation for payment, and then updating the invoice with the payment status. For businesses, knowing which invoice corresponds to which payment is as critical as making the payment itself. ③ Signature verification provides evidence of origin and content integrity, but it cannot alone confirm the authenticity of the transaction context, delivery of goods, or reasonableness of each charge. Business-level review still has its essential role. ④ This should currently be understood as a proof-of-concept and demonstration—not as evidence that all banks support it or merchants have fully enabled it. The official scope of availability, fees, failure handling, and general rollout timeline remain to be disclosed. My own assessment: I’m keen to follow these payment workflow improvements. Whether businesses adopt them will depend on whether verification, authorization, payment, and reconciliation can be seamlessly connected. Only when the entire process becomes truly effortless will on-chain settlement become a practical everyday tool. @Solana_zh @solana @altitude