> ## Documentation Index
> Fetch the complete documentation index at: https://www.diadata.org/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Linea

> dApps built on Linea can leverage DIA oracles to access up-to-date asset price information.

DIA is a cross-chain, trustless oracle network delivering verifiable price feeds for Linea. DIA sources raw trade data directly from primary markets and computes it onchain, ensuring complete transparency and data integrity.

## Oracle Contracts

| Chain         | Contract Address                                                                                                                 |
| ------------- | -------------------------------------------------------------------------------------------------------------------------------- |
| Linea Sepolia | [0x533d3c1df8d238374065fb3341c34754e4bfce8e](https://sepolia.lineascan.build/address/0x533d3c1df8d238374065fb3341c34754e4bfce8e) |

## Oracle Configuration

|                                       |                                                                                                                            |
| ------------------------------------- | -------------------------------------------------------------------------------------------------------------------------- |
| **Pricing Methodology**               | [VWAPIR](/docs/guides/methodologies/pricing-methodologies/vwapir-volume-weighted-average-price-with-interquartile-range-filter) |
| **Deviation (%) & Refresh Frequency** | 0.5% and 120 seconds                                                                                                       |
| **Heartbeat**                         | 24h                                                                                                                        |

## Available Asset Feeds

| Asset Price Feed | Asset Markets                                                                                                |
| :--------------- | :----------------------------------------------------------------------------------------------------------- |
| USDC/USD         | [USDC Markets](https://www.diadata.org/app/price/asset/Ethereum/0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48/) |
| BTC/USD          | [BTC Markets](https://www.diadata.org/app/price/asset/Bitcoin/0x0000000000000000000000000000000000000000/)   |
| DIA/USD          | [DIA Markets](https://www.diadata.org/app/price/asset/Ethereum/0x84cA8bc7997272c7CfB4D0Cd3D55cd942B3c9419/)  |

***

## How to Access Data

### getValue Method

To consume price data, you’ll need to invoke the [`getValue` method](/docs/guides/how-to-guides/fetch-price-data/solidity#solidity-library) on the oracle contract which you can access through the [DIA Oracle library](/docs/guides/how-to-guides/fetch-price-data/solidity#solidity-library) or the [interface](/docs/guides/how-to-guides/fetch-price-data/solidity#using-the-diaoraclev2-interface).

Below is an example of a contract consuming data from the Telos mainnet oracle. If you pass `BTC/USD` as the key, it will return the most recent price of BTC in USD with **8 decimal places** (e.g. 9601458065403 is \$96,014.58065403) along with the Unix timestamp of the last price update.

```solidity theme={"system"}
pragma solidity ^0.8.13;

interface IDIAOracleV2 {
    function getValue(string memory) external view returns (uint128, uint128);
}

contract DIAOracleV2Consumer {

    address immutable ORACLE = 0x533d3c1df8d238374065fb3341c34754e4bfce8e;

    function getPrice(string memory key)
    external
    view
    returns (
        uint128 latestPrice,
        uint128 timestampOfLatestPrice
    ) {
        (latestPrice, timestampOfLatestPrice) =
                 IDIAOracleV2(ORACLE).getValue(key);
    }
}
```

See the full example [here](/docs/guides/how-to-guides/fetch-price-data/solidity).

***

## Request a Custom Oracle

DIA offers highly customizable oracles that are individually tailored to each dApp's needs. Each oracle can be customized in the following ways, including:

* Data Sources & Asset Feeds
* Pricing Methodologies
* Update Triggers (Frequency, Deviation, Heartbeat, ...etc)

Get a tailored oracle for your dApp, request one below:

<CardGroup>
  <Card title="Request Custom Oracle" href="/docs/guides/how-to-guides/request-a-custom-oracle" icon="angle-right" iconType="solid" horizontal />
</CardGroup>

## Support

For developer assistance, connect with the DIA team directly on [Discord](https://discord.gg/ZvGjVY5uvs) or [Telegram](https://t.me/diadata_org).