Processing Multiple Streams of Data from Binance WebSocket with Ethereum

As a cryptocurrency enthusiast, you’ve probably experienced the thrill of watching live market price movements. In your case, you’re using the Unicorn_Binance_Websocket_API to simultaneously stream price data for 100 cryptocurrencies and two different time frames. To process this data and keep track of the close prices of different cryptocurrencies, you’ll need to use a little more sophistication.

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 into your preferred programming language.

• 
  Unicorn_Binance_Websocket_API: Install and configure the Unicorn Binance WebSocket API to stream data for 100 cryptocurrencies and two different time periods.

Step 1: Define the data model

First, let’s define the basic data model that will store the closing prices of various cryptocurrencies. Create a new contract using Solidity (the Ethereum programming language).

pragma solidity ^0,8,0;
contract ClosePrices {
struct CryptoData {
address token; // crypto token address
uint256 timestamp; // timestamp when the data was received
uint256 price; // crypto closing price
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 rigidity ^0,8,0;
contract ClosePrices {
ClosePrices private _instance; // contract instance
function init() public payable {
_instance = ClosePrices();
}
mapping(address => Cryptodata) public closePrices;
}

Step 3: Subscribe to Binance Websocket

Use the Unicorn Binance WebSocket API subscribe method to create a subscription to the price data. Be sure to handle errors and exceptions properly.

pragma rigidity ^0,8,0;
contract ClosePrices {
ClosePrices private _instance; // contract instance
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 to get 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 (address token, uint256 price) public {
emit NewPrice(token, 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 the contract to process the received price data. For example, you can update the mapping or emit events as needed.

``` hardness

pragma hardness ^0.8.