# Security

#### Oracles

Aurelius uses API3 price feeds, falling back to a Tellor oracle under the following (extreme) conditions:

* API3 price has not been updated for more than 4 hours
* API3 response call reverts, returns an invalid price or an invalid timestamp
* The price change between two consecutive API3 price updates is >50%.

Please note that, although the system is diligently audited, a hack or a bug that results in losses for the users can never be fully excluded.

#### Audits

Aurelius utilizes the [**Ethos Reserve**](https://www.ethos.finance/) codebase, which is fully audited by Certik, and has been extensively audited in a $150,000 Code4Rena contest.

Read the Full CertiK Audit Report

[View Report](https://ethos.finance/wp-content/uploads/2023/08/CertiK_EthosReserve_AuditReport.pdf)

See the Code4Rena Contest Results

[View Results](https://code4rena.com/reports/2023-02-ethos)

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If you have questions, please reach out to the Aurelius team in our official [Discord](https://discord.com/invite/Fe7Svu5rg3).
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