DIA Data Oracles on 5DAX Chain

Introduction

DApp developers who want to leverage DIA oracles can access the published data on 5DAX Chain. DIA offers cryptocurrency and data about traditional financial assets.

Supported Assets

DIA supports assets from various categories to be included into the oracle. A selection of assets is listed here:

Data Feed Name	Data Type
5DAX Coin	Crypto Price
Bitcoin	Crypto Price
Ethereum	Crypto Price
Tether	Crypto Price
XRP	Crypto price
Barnbridge Protocol	Farming Pool Data
yearn.finance	Farming Pool Data
CREX on Crex	Chart Point on Exchange
DAI on CurveFi	Chart Point on Exchange
WNT on PancakeSwap	Chart Point on Exchange

Data Access

All asset prices are determined in USD. Where appliccable, the oracle also provides information on circulating supply and the timestamp of data collection. The query in the smart contract is realized with the symbol of the asset.

Smart Contract

DIA data is published in the DIAOracle smart contract. By querying the getCoinInfo() function you can retrieve the requested data.

It takes the name of the asset as input, e.g., Bitcoin and returns this struct of data:

struct CoinInfo {
    uint256 price;
    uint256 supply;
    uint256 lastUpdateTimestamp;
    string symbol;
}

The following snippet shows how to retrieve the BTC price of an asset (e.g. 5DAX Coin) using a smart contract.

pragma solidity ^0.4.24;

contract DiaOracle {
    address owner;

    struct CoinInfo {
        uint256 price;
        uint256 supply;
        uint256 lastUpdateTimestamp;
        string symbol;
    }

    mapping(string => CoinInfo) diaOracles;

    event newCoinInfo(
        string name,
        string symbol,
        uint256 price,
        uint256 supply,
        uint256 lastUpdateTimestamp
    );

    constructor() public {
        owner = msg.sender;
    }

    function changeOwner(address newOwner) public {
        require(msg.sender == owner);
        owner = newOwner;
    }

    function updateCoinInfo(string name, string symbol, uint256 newPrice, uint256 newSupply, uint256 newTimestamp) public {
        require(msg.sender == owner);
        diaOracles[name] = (CoinInfo(newPrice, newSupply, newTimestamp, symbol));
        emit newCoinInfo(name, symbol, newPrice, newSupply, newTimestamp);
    }

    function getCoinInfo(string name) public view returns (uint256, uint256, uint256, string) {
        return (
            diaOracles[name].price,
            diaOracles[name].supply,
            diaOracles[name].lastUpdateTimestamp,
            diaOracles[name].symbol
        );
    }
}

contract DiaAssetBtcOracle {
    DiaOracle oracle;
    address owner;

    constructor() public {
        owner = msg.sender;
    }

    function setOracleAddress(address _address) public {
        require(msg.sender == owner);
        oracle = DiaOracle(_address);
    }

    function getAssetEurRate(string asset) constant public returns (uint256) {
        (uint assetPrice,,,) = oracle.getCoinInfo(asset);
        (uint btcPrice,,,) = oracle.getCoinInfo("Bitcoin");
        return (assetPrice * 100000 / btcPrice);
    }

}

Deployed Addresses

Chain name	Oracle Contract Address	Update Frequency
NC: Testnet	0xf35bEE4B6727D2D1c9167C5fB4D51855D6bB693c	1/day
NC: Mainnet	0xf35bEE4B6727D2D1c9167C5fB4D51855D6bB693c	1/day

The full documentation of the DIA oracle is located here.