Stablecoin Payments

Check payment webhook signatures, order binding and current refund state before fulfillment, with a small exercise and a merchant acceptance worksheet.

Compare hosted and custom checkout by order references, confirmation, refund flow and data ownership. A responsibility worksheet without availability promises.

Preserve raw provider events and map them to explicit order decisions. Includes a worksheet for duplicates, unknown statuses, refunds and reconciliation.

Review server-owned stablecoin prices, raw integer amounts, asset identity and order expiry using the current StableIn local merchant example.

Separate refund amounts from download access decisions, with a source-based look at StableIn fulfillment and a scoped entitlement extension.

Repeated notifications should not create repeated entitlements. Build a durable inbox and outbox, then test retries, concurrency and interrupted transactions.