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A practical security checklist for launching crypto checkout

Review account access, wallets, invalid payments, duplicate fulfillment and deployment operations before launching checkout.

THE SHORT ANSWER

A crypto checkout launch needs evidence that account access, wallet destinations, transaction verification and fulfillment work together. A feature list or passing build is useful, but it does not establish that every deployment is safe for unrestricted real payments.

Review the destination and account controls

Confirm who controls each receiving wallet and how its recovery material is protected. Inspect the actual checkout destination after account changes, protect merchant and administrator sign-in, and configure appropriate authenticator and recovery procedures. For example, a strong server password will not help if a team member replaces a USDC address using a compromised email session. Keep integration keys in backend secrets and remove unused access paths.

Exercise failure and duplicate paths

Create a test plan covering wrong networks, incorrect recipients, unsupported token contracts, changed amounts, failed transfers and insufficient confirmations. Confirm that none of these cases can fulfill an order. Test duplicate webhooks arriving alongside polling and verify that only one business action occurs. Include quote expiry, provider outages and a worker crash after delivery success. The merchant Sandbox helps with checkout states and Base Sepolia transfers, but it does not automatically validate every commerce plugin, platform account or external fulfillment service.

Verify deployment operations and recovery

Check that required migrations, production secrets, RPC endpoints, email delivery and scheduled workers are configured for the deployed environment. Define who handles stuck orders, credential exposure and mismatched transfers. Preserve receipts and audit evidence so an incident can be investigated without guessing. Automatic token billing adds its own reviewed contract deployment, finite authorization, relayer funding and cancellation tests. A production launch should be based on the scoped review and acceptance results, with any remaining limitations plainly recorded rather than replaced by a blanket audited label.

Practical checklist

  • Verify receiving addresses, account access, backend secrets and recovery ownership.
  • Test invalid payments, expiry, duplicate processing and downstream fulfillment failures.
  • Confirm deployed configuration, monitoring, incident ownership and backup recovery procedures.

Common questions

Do automated tests prove the whole service cannot be hacked?+

No. Tests cover defined behavior and can miss deployment, dependency, operational and future vulnerabilities. Use scoped review and ongoing maintenance.

Can I skip a wallet trial if the checkout preview looks correct?+

No. Preview is visual and simulated. Transaction verification and your own end-to-end order fulfillment need separate acceptance tests.

Sources and further reading

Primary references and Coinvay product documentation. Check the linked pages for current details.

  1. Coinvay merchant API documentation

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