> For the complete documentation index, see [llms.txt](https://crosschain-alliance.gitbook.io/hashi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://crosschain-alliance.gitbook.io/hashi/introduction/what-is-hashi.md).

# What is Hashi?

**Hashi** is a robust and innovative **EVM hash oracle aggregator** designed to significantly enhance the security of cross-chain applications. It leverages multiple independent oracles to validate and verify block headers and messages across different blockchain networks, ensuring a more secure and reliable way to facilitate interactions between chains.

In a landscape where cross-chain bridges are prone to risks due to reliance on single points of failure, Hashi introduces an **additive security model**, where multiple oracles work together to ensure the integrity and authenticity of data relayed across chains. This approach minimizes vulnerabilities and strengthens the overall security of decentralized applications (dApps) that rely on cross-chain communication.

#### **Key Features of Hashi**

* **Multi-Oracle Validation**: Hashi aggregates the results from multiple oracles to validate block headers and messages, reducing the likelihood of failure due to malicious actors or faulty data.
* **Cross-Chain Compatibility**: It supports multiple blockchain networks, including Ethereum, Gnosis Chain, and others, making it adaptable to a wide range of dApps and cross-chain use cases.
* **Arbitrary Message Relaying**: Hashi allows for secure and scalable message relaying between chains, ensuring that cross-chain interactions are not only secure but also efficient.
* **Additive Security**: The more oracles that participate in Hashi, the stronger the security, creating an increasing level of protection as the network grows.
* **RIP-7755 Compatibility:** Hashi fosters standardization in the Cross-Chain interoperability landscape.

In essence, Hashi provides an advanced layer of **security and reliability** for any project that relies on cross-chain data, offering developers peace of mind and more control over the security of their decentralized applications.


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