Designing a stablecoin checkout that does not break order state

Short summary

Adding stablecoin payments to a store requires more than showing a wallet address — real customers trigger edge cases like wrong networks, partial payments, and expired orders. A proper checkout needs a state machine that treats blockchain detection as an input, with idempotent webhook handling to prevent duplicate orders. The author introduces ChainPay, a lightweight stablecoin checkout for stores, SaaS, WooCommerce, and AI agents currently in pre-launch.

• •Stablecoin checkouts need a state machine to handle wrong networks, partial payments, and expired orders
• •Blockchain detection should be an input to the state machine, not the state machine itself
• •ChainPay is pitched as a lightweight stablecoin checkout for stores, SaaS, and AI agents

Generated with AI, which can make mistakes.