The Randomness Risk Map

Five on-chain randomness sources plotted on latency vs. manipulation cost. Click any dot to see mechanism, security tier, gas cost, and recommended use case.

chart SVG Smart Contracts Security Jun 22, 2026

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The Randomness Risk Map — click a source dot to inspect details · data as of Jun 22, 2026 · Chainlink VRF Coordinator V2 on Ethereum Mainnet (Blockscout), Chainlink docs, Ethereum beacon chain stats ↗ open artifact ↗

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Smart Contracts Security AI

The Biased Beacon: On-Chain Randomness and the AI Agent Attack Surface

PREVRANDAO costs roughly $88 per bit to bias. Chainlink VRF costs $2.43 per request. Here's how to choose the right randomness source for AI agents making on-chain decisions — and what breaks when you choose wrong.

Jun 22, 2026 8 min read ⬢ interactive