Aleph Zero

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

DIA is a cross-chain oracle provider that sources granular market data from diverse exchanges, including CEXs and DEXs. Its data sourcing is thorough, enabling unparalleled transparency and customizability for resilient price feeds for 20,000+ assets. Its versatile data processing and delivery ensures adaptability and reliability for any decentralized application.

Oracle details

Chain	Address
Mainnet	0x4845890f8d7b4A0b29759271929B0FCF672aEED6

Oracle configuration

Pricing Methodology	VWAP
Deviation (%) & Refresh Frequency	0.5% and 120 seconds
Heartbeat	24h

Asset feeds

Asset Ticker	getValue(key)	Asset Markets
USDT	USDT/USD	USDT markets
USDC	USDC/USD	USDC markets
BTC	BTC/USD	BTC markets
ETH	ETH/USD	ETH markets
stETH	stETH/USD	stETH markets
AZERO	AZERO/USD	AZERO markets
ARB	ARB/USD	ARB markets

How to access data

To consume price data, you’ll need to invoke the getValue method on the oracle contract which you can access through the DIA Oracle library or the interface.

Below is an example of a contract consuming data from our oracle on Aleph Zero mainnet. 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.

pragma solidity ^0.8.13;

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

contract DIAOracleV2Consumer{

    address immutable ORACLE = 0x4845890f8d7b4A0b29759271929B0FCF672aEED6;

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

See the full example here.

Support

For developer assistance, connect with the DIA team directly on Discord or Telegram.

Developers seeking other specialized, production-grade oracle with tailored price feeds and configurations can initiate the request by contacting the DIA BD Team via Telegram.