> ## 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.

# LitVM

> dApps built on LitVM 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 [LitVM](https://litvm.com/). DIA sources raw trade data directly from primary markets and computes it onchain, ensuring 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.

### Oracle Contracts

| Chain         | Contract Address                                                                                                                        |
| ------------- | --------------------------------------------------------------------------------------------------------------------------------------- |
| LitVM Testnet | [0xE7F65d4bAdcfABc4eA57B8F66bBa044363D89eec](https://liteforge.explorer.caldera.xyz/address/0xE7F65d4bAdcfABc4eA57B8F66bBa044363D89eec) |

### Oracle Configuration

| Parameter               | Value                                                                                                                         |
| ----------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
| **Pricing Methodology** | [Median](https://www.diadata.org/docs/dia-stack/architecture/core-components/lasernet/overview#price-aggregation-methodology) |
| **Deviation (%)**       | 0.5% for stablecoins, 1% for other assets                                                                                     |
| **Heartbeat**           | 1h                                                                                                                            |

### Available Asset Feeds

| Chain         | Price Feed | Type   | Adapter Address (AggregatorV3Interface)                                                                                                 |
| :------------ | :--------- | :----- | :-------------------------------------------------------------------------------------------------------------------------------------- |
| LitVM Testnet | LTC        | Market | [0x45dDa5d881BD2C917976CCfde74fFd6f6412da29](https://liteforge.explorer.caldera.xyz/address/0x45dDa5d881BD2C917976CCfde74fFd6f6412da29) |
| LitVM Testnet | USDC       | Market | [0x4f91a950ed73c8B6F28dFE460f9444ed8866894f](https://liteforge.explorer.caldera.xyz/address/0x4f91a950ed73c8B6F28dFE460f9444ed8866894f) |
| LitVM Testnet | USDT       | Market | [0xd7ff0A3DdE1FdC2137Ff4CaAde5396f009739645](https://liteforge.explorer.caldera.xyz/address/0xd7ff0A3DdE1FdC2137Ff4CaAde5396f009739645) |
| LitVM Testnet | ETH        | Market | [0xc760B46beF9eD3F9A3d2b825164324D6703F0185](https://liteforge.explorer.caldera.xyz/address/0xc760B46beF9eD3F9A3d2b825164324D6703F0185) |
| LitVM Testnet | BTC        | Market | [0x7d0445782E383223c7B4B660bb96b87213e9b605](https://liteforge.explorer.caldera.xyz/address/0x7d0445782E383223c7B4B660bb96b87213e9b605) |
| LitVM Testnet | XAU        | Market | [0x519A391D8999F0A18E1E9A5649FEA3D942A1bDdF](https://liteforge.explorer.caldera.xyz/address/0x519A391D8999F0A18E1E9A5649FEA3D942A1bDdF) |
| LitVM Testnet | XAG        | Market | [0xfb49F5C1eFF83Cc392357Cb979a9432C90eE0eb7](https://liteforge.explorer.caldera.xyz/address/0xfb49F5C1eFF83Cc392357Cb979a9432C90eE0eb7) |
| LitVM Testnet | WTI        | Market | [0x9cee709Fc9Da87d958a468859b8C02d591b7245A](https://liteforge.explorer.caldera.xyz/address/0x9cee709Fc9Da87d958a468859b8C02d591b7245A) |
| LitVM Testnet | XBR        | Market | [0x41bb23dD937C5733BF8c0826b9d99d89790c0cAF](https://liteforge.explorer.caldera.xyz/address/0x41bb23dD937C5733BF8c0826b9d99d89790c0cAF) |

## How to Access Data

### Adapter contracts

To consume price data from the oracle, use the [adapter smart contract](#available-asset-feeds) for the asset you want to query on LitVM Testnet. This will allow you to access the same methods on the AggregatorV3Interface such as `getRoundData` & `latestRoundData`.

Below is an example of a contract consuming `$USDC` from the oracle using the [DiaAssetSpecificCallingConvention](/docs/guides/how-to-guides/migrate-to-dia#chainlink-adapter) interface. It will return the most recent price of `USDC` in `USD` with 18 decimal places (e.g. 999799952400000000 is \$0.9997999524) along with the Unix timestamp of the last price update.

```solidity theme={"system"}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

interface DiaAssetSpecificCallingConvention {
    function latestRoundData() external view returns (
        uint80 roundId,
        int256 answer,
        uint256 startedAt,
        uint256 updatedAt,
        uint80 answeredInRound
    );
}

contract DIAOracleSample {
    address usdcAdapter = 0x4f91a950ed73c8B6F28dFE460f9444ed8866894f;

    function getUSDCLatestPrice() external view returns (
        uint128 latestPrice,
        uint128 timestampOflatestPrice
    ) {
        // Call the Chainlink adapter's latestRoundData function
        (, int256 answer, , uint256 updatedAt, ) =
        DiaAssetSpecificCallingConvention(usdcAdapter).latestRoundData();

        latestPrice = uint128(uint256(answer));
        timestampOflatestPrice = uint128(updatedAt);

        return (latestPrice, timestampOflatestPrice);
    }
}
```

***

## 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).