# Oracles

🌐 Overview

Oracles play a critical role in bridging the gap between blockchain and the external world, enabling smart contracts on Hemi to access trustworthy off-chain data necessary for various use cases. 

The most common applications of oracles include:

* Providing up-to-date token prices for different pairs, which is essential for DeFi protocols and financial products.
* Enabling dynamic NFTs that can change their properties based on real-world events, adding a layer of interactivity and uniqueness.

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## ⎑ Push vs Pull

Oracles operate using two primary models:

* **Push Model:** In this traditional approach, the oracle regularly pushes data to an on-chain contract, which dApps can access as needed.
* **Pull Model:** This newer model involves oracles signing data and keeping it on an external network. When dApps need updated data, users pull the signed data and submit it on-chain with their transaction.

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### Pyth <a href="#redstone" id="redstone"></a>

Pyth offers push-based price feeds for Hemi.&#x20;

#### **Supported Networks:**

* Hemi Mainnet
* Hemi Sepolia

{% embed url="<https://insights.pyth.network/price-feeds?search=hemi>" %}

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### Redstone <a href="#redstone" id="redstone"></a>

Redstone offers push-based price feeds for Hemi.&#x20;

#### Supported Networks:

* Hemi Mainnet
* Hemi Sepolia

{% embed url="<https://app.redstone.finance/app/feeds/?networks=743111,43111&page=1&sortBy=popularity&sortDesc=false&perPage=32>" %}

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### Stork <a href="#redstone" id="redstone"></a>

Stork offers pull-based price feeds for Hemi.&#x20;

#### Supported Networks:

* Hemi Mainnet

{% embed url="<https://docs.stork.network/resources/contract-addresses/evm#hemi>" %}

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### eOracle <a href="#redstone" id="redstone"></a>

eOracle offers pull-based price feeds for Hemi.&#x20;

#### Supported Networks:

* Hemi Mainnet

{% embed url="<https://docs.eo.app/docs/eprice/feed-addresses/hemi>" %}


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