Ethereum

Smart contract

Contract address: 0x5D16E4Ca2339a7aeCb3Ac91Ec540e1EfE7c7EF89

ORAI token: 0x4c11249814f11b9346808179Cf06e71ac328c1b5

Fee: 1 ORAI

Price Data Requests

• A price feed request on the Ethereum network requires ERC20 ORAI for a fee.

• We support multi-currency pricing, each currency will map with the corresponding Id.

Symbol	Id
ORAI	0
BTC	1
ETH	2
XRP	3
DOGE	4
USDT	5
LINK	6
UNI	7
USDC	8
BUSD	9
SOL	10
DOT	11
LUNA	12
XLM	13
ATOM	14
AAVE	15
EOS	16
AXS	17
ALGO	18
MKR	19

Example

// SPDX-License-Identifier: MIT
pragma solidity ^0.5.16;

interface IERC20 {
    function approve(address spender, uint256 amount) external returns (bool);
}


interface IPriceFeedOracle {
    function priceRequest(uint256 _symbolId, bytes calldata _data) external returns (bytes32 reqId);

    function getFee() external returns (uint256);
}

contract PriceFeedConsumerExample {

    address public orai;
    address public oracle;
    uint256 public price;
    bytes32 public reqId;
    uint256 public decimal;

    constructor (address _oraiToken, address _oracle) public {
        orai = _oraiToken;
        oracle = _oracle;
    }

    function priceRequest(uint256 _symbolId) public {
        IERC20(orai).approve(oracle, IPriceFeedOracle(oracle).getFee());
        bytes memory data = abi.encode(address(this), this.fulfillPrice.selector);
        reqId = IPriceFeedOracle(oracle).priceRequest(_symbolId, data);
    }

    function fulfillPrice(bytes32 _reqId, uint256 _priceToUsd, uint256 _decimal) external {
        price = _priceToUsd;
        decimal = _decimal;
    }
}

General guideline for smart contract users

To request price feed, your contract needs to inherit PriceFeedOracle and define 2 required functions:

1. priceRequest: initiate a request to get price

2. fulfillPrice: will perform receiving price and verifying data.

• ⚠️Your contract needs to have enough ORAI or the needed token to make the request for a random number.