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Ethereum
Fee: 1 ORAI
- 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 |
// 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;
}
}
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.⚠
Last modified 7mo ago