Guardrail

Guardrail handles on-chain runtime security through programmable Guards, each targeting one class of attack by inspecting a transaction's function calls and state changes. Coverage spans reentrancy, approval races, flash loans, oracle manipulation, governance attacks and multisig anomalies, evaluated per block, function or event, with a hit triggering an alert or an automatic contract pause.

Its value sits after deployment: a static audit only covers code before launch, while parameter changes, new integrations and shifting economic conditions open fresh attack surfaces in production, so Guardrail runs checks as a standing process and routes alerts to on-call staff through PagerDuty, Slack and Telegram. In 2026 it connected with Cantina's managed detection and response service, linking machine detection to a human response path, expanded coverage past 30 networks, and reports protecting more than five billion dollars in assets for clients including Euler, EigenLayer and Scroll.