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# DIA

## Overview

[DIA](https://www.diadata.org/) 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.

Key features:

-   Complete verifiability from source to destination smart contract.
-   Direct data sourcing from 100+ primary markets eliminating intermediary risk.
-   Support for 20,000+ assets across all major asset classes.
-   Custom oracle configuration with tailored sources and methodologies.

Data products:

-   **Token Price Feeds**: Real-time market prices for assets across CEXs and DEXs.
-   **Fundamental Feeds**: Fair value pricing and backing data (NAV, Proof of Reserve, and more).
-   **Real-World Asset (RWA) Feeds**: Traditional financial data including Equities, FX rates, commodities, and ETFs.
-   **Randomness**: Verifiable random number generation for gaming, lotteries, and more.

## Querying DIA price feeds

note

This is a demo oracle which is not intended for use in production environments. Interested in a production-ready oracle? [Contact the DIA team](https://t.me/DIAOracles_Support_Bot).

Call the `getValue(string memory key)` function on the oracle contract with the Query Symbol (e.g., "BTC/USD"). The function returns the asset price with 8 decimal precision and the timestamp of the last update. We'll use this address on Linea Sepolia: [`0x533d3c1df8d238374065fb3341c34754e4bfce8e`](https://sepolia.lineascan.build/address/0x533d3c1df8d238374065fb3341c34754e4bfce8e).

```solidity
pragma solidity ^0.8.13;
interface IDIAOracleV2 {
    function getValue(string memory) external view returns (uint128,
             uint128);
}
contract DIAOracleSample {
    /**
    * @notice The DIA oracle to read from.
    * Oracle Address: 0x533d3c1df8d238374065fb3341c34754e4bfce8e
    * Network: Linea Sepolia
    */
    address constant diaOracle = "0x...";
    function getPrice(string memory key)
    external
    view
    returns (
        uint128 latestPrice,
        uint128 timestampOfLatestPrice
    ) {
        (latestPrice, timestampOfLatestPrice) =
                 IDIAOracleV2(diaOracle).getValue(key);
    }
}
```

Please refer to [DIA's documentation](https://www.diadata.org/docs/guides/chain-specific-guide/linea) for the list of available price feeds.

## Request a custom oracle

For dapps requiring specific configurations, DIA deploys production-grade custom oracles tailored to your requirements with configurable data sources, pricing methodologies, update triggers, and coverage for any of 20,000+ supported assets.

→ [Request a custom oracle](https://www.diadata.org/docs/guides/how-to-guides/request-a-custom-oracle)

## Resources

-   Developer support: [Discord](https://discord.com/invite/ZvGjVY5uvs) | [Telegram](https://t.me/diadata_org)
-   [Linea integration guide](https://www.diadata.org/docs/guides/chain-specific-guide/linea)
-   [DIA documentation](https://www.diadata.org/docs)