Use these tips to get the most reliable results when requesting randomness. Ensure your rollup delegates to a trusted oracle queue with the DelegateOracleQueue instruction so that requests are fulfilled promptly.

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Seed Selection

  • Combine user input with server timestamps or game state to create unpredictable seeds.
  • Avoid letting players specify the entire caller_seed to prevent grinding.

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Callback Validation

  • Always check the vrf_program_identity to confirm the callback is from MagicBlock’s official signer.
  • Reject callbacks that do not match the original request parameters.

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State Management

  • Store any pending request identifiers so that retries or unexpected callbacks can be handled safely.
  • Track the oracle queue your requests were delegated to so results can be matched back correctly.
  • Keep random outputs ephemeral—consume them immediately within your rollup logic and avoid reusing them.

Following these guidelines reduces the risk of manipulation and ensures consistent randomness across sessions.