# Pyth

### Overview

[Pyth Network](https://pyth.network/) is one of the largest first-party Oracle network, delivering real-time data across [a vast number of chains](https://docs.pyth.network/price-feeds/contract-addresses). The network comprises some of the world’s [largest exchanges, market makers, and financial services providers](https://pyth.network/publishers). These publish proprietary data on-chain for aggregation and distribution to smart contract applications.

### Using Pyth Network on Cronos EVM

The Pyth introduces an innovative low-latency [pull oracle design](https://docs.pyth.network/documentation/pythnet-price-feeds/on-demand), where users can pull price updates onchain when needed, enabling everyone in the onchain environment to access that data point most efficiently. Pyth network updates the prices every **400ms.**

Developers on Cronos EVM have permissionless access to any of [Pyth’s price feeds](https://pyth.network/developers/price-feed-ids) for equities, ETFs, commodities, foreign exchange pairs, and cryptocurrencies.

#### Example

Here is a working example of a contract that fetches the latest price of ETH/USD on the Cronos network. You have to pass [Pyth's contract address](https://docs.pyth.network/price-feeds/contract-addresses/evm) for Cronos EVM mainnet/testnet and the desired [price feed id](https://pyth.network/developers/price-feed-ids) to fetch the latest price.

```solidity
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.13;

import "@pythnetwork/pyth-sdk-solidity/IPyth.sol";
import "@pythnetwork/pyth-sdk-solidity/PythStructs.sol";

contract MyFirstPythContract {
    IPyth pyth;

    constructor(address _pyth) {
        pyth = IPyth(_pyth);
    }

    function fetchPrice(
        bytes[] calldata updateData,
        bytes32 priceFeed
    ) public payable returns (int64) {
		    // Fetch the priceUpdate from hermes.
        uint updateFee = pyth.getUpdateFee(updateData);
        pyth.updatePriceFeeds{value: updateFee}(updateData);

        // Fetch the latest price
        PythStructs.Price memory price = pyth.getPrice(priceFeed);
        return price.price;
    }
}
```

Here you can fetch the `updateData` from Pyth's [`Hermes`](https://hermes.pyth.network/docs/), which listens to Pythnet and Wormhole for price updates; or you can use the [`pyth-evm-js`](https://github.com/pyth-network/pyth-crosschain/blob/main/target_chains/ethereum/sdk/js/src/EvmPriceServiceConnection.ts#L15) SDK. Check [How to Fetch Price Updates](https://docs.pyth.network/price-feeds/fetch-price-updates) to pull the latest data.

This [package](https://github.com/pyth-network/pyth-crosschain/tree/main/target_chains/ethereum/sdk/solidity) provides utilities for consuming prices from the Pyth network oracle using Solidity. Also, it contains the [Pyth Interface ABI](https://github.com/pyth-network/pyth-crosschain/blob/main/target_chains/ethereum/sdk/solidity/abis/IPyth.json) that you can use in your libraries to communicate with the Pyth contract.

It is generally recommended to follow the [consumer best practices](https://docs.pyth.network/documentation/pythnet-price-feeds/best-practices) when consuming Pyth data.

For more information, check out the official [Pyth documentation](https://docs.pyth.network/price-feeds). There are details on the various functions available for interacting with the Pyth smart contract in the [API Reference section](https://api-reference.pyth.network/price-feeds/evm/getPrice).

### Pyth on Cronos EVM

The Pyth Network smart contract is available at the following address:

**Cronos EVM**

* Mainnet: [0xE0d0e68297772Dd5a1f1D99897c581E2082dbA5B](https://cronoscan.com/address/0xe0d0e68297772dd5a1f1d99897c581e2082dba5b)
* Testnet: [0x36825bf3Fbdf5a29E2d5148bfe7Dcf7B5639e320](https://cronos.org/explorer/testnet3/address/0x36825bf3Fbdf5a29E2d5148bfe7Dcf7B5639e320)

Additionally, click to access the [Pyth price-feed IDs](https://pyth.network/developers/price-feed-ids).

### Using Pyth as a PUSH Oracle

Pyth Oracle can be used as a Push oracle by running a scheduler which can update the prices in the backend. Checkout the open source [price pusher](https://github.com/pyth-network/pyth-crosschain/tree/main/apps/price_pusher) app to get started with the scheduler.

### Developers and community

The Pyth network provides additional tools to developers, such as

* [TradingView Integration](https://docs.pyth.network/guides/how-to-create-tradingview-charts), or
* [Gelato web3 functions](https://docs.pyth.network/guides/how-to-schedule-price-updates-with-gelato).

Check out the following links to get started with Pyth.

* [Pyth EVM Integration Guide](https://docs.pyth.network/price-feeds/use-real-time-data/evm)
* [Pyth Docs](https://docs.pyth.network/home)
* [Pyth API Reference](https://api-reference.pyth.network/price-feeds/evm/getPrice)
* [Pyth Examples](https://github.com/pyth-network/pyth-examples)
* [Pyth Price Feed Ids](https://pyth.network/developers/price-feed-ids)
* [Website](https://pyth.network/)
* [Twitter](https://x.com/PythNetwork)


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