Processing Other Stream Data from Binance WebSocket Using Ethereum
As a cryptocurrency enthusiast, you’ve probably experienced the thrill of watching real-time market price movements. In your case, you’re using Unicorn_Binance_Websocket_API to stream price data for 100 cryptos and two different time frames simultaneously. To process this data and store the recent prices of different cryptocurrencies, you’ll need to leverage a bit more complexity.
In this article, we’ll explore how to achieve this using Ethereum smart contracts.
Prerequisites
Before diving into the code, make sure you have:
- Ethereum Wallet: Set up an Ethereum wallet (e.g. MetaMask) and import it using your preferred programming language.
- Unicorn_Binance_Websocket_API
: Install and configure the Unicorn Binance WebSocket API to stream data for 100 cryptos and two different time frames.
Step 1: Define the data model
First, we define a basic data model that stores the close prices of different cryptocurrencies. Create a new contract using Solidity (the programming language for Ethereum).
pragma solidity ^0,8,0;
contract ClosePrices {
struct CryptoData {
addressid; // address of the cryptocurrency token
uint256 timestamp; // timestamp when the data was received
price uint256; // closing price of the cryptocurrency
uint256 timestamp2; // timestamp when the second data was received (optional)
}
mapping(address => CryptoData) public closePrices;
}
Step 2: Initialize the contract
Create a new contract instance and initialize it with an empty map to store the closing prices.
pragma strength ^0,8,0;
contract ClosePrices {
ClosePrices private _instance; // contract example
function init() public payable {
_instance = ClosePrices();
}
mapping(address => CryptoData) public closePrices;
}
Step 3: Subscribe to Binance Websocket
Use the Unicorn Binance WebSocket API’s subscribe method to subscribe to price data. Make sure to handle errors and exceptions properly.
pragma strength ^0,8,0;
contract ClosePrices {
ClosePrices private _instance; // contract example
function init() public payable {
_instance = ClosePrices();
}
mapping(address => CryptoData) public closePrices;
event NewPrice(address indexed token, uint256 price);
function subscribe() public payable {
// Subscribe to Binance WebSocket price data
try (new Unicorns.BinanceWebsocketAPI("YOUR_API_KEY", "YOUR_API_SECRET")) {
_instance.subscribe(
address(this), // the contract that subscribed to the event
ClosePrices.NewPrice, // the event name
function (addressid, uint256 price) public {
emit NewPrice(id, price);
}
);
} catch (error) {
return error;
}
}
// Optional: Set the maximum number of data points to store
function setMaxDataPoints(uint256 _maxDataPoints) public {
closePrices[msg.sender].closePrices = new uint256[_maxDataPoints];
}
}
Step 4: Process the data
Create functions in your contract to process the received price data. For example, you can update the mapping or send events as needed.
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pragma robustness ^0.8.
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