Binance WebSocket with Ethereum Multi-Stream Data Processing from Binance WebSocket**
As a cryptocurrency enthusiast, you’ve probably experienced the thrill of watching market prices fluctuate in real time. In your case, you’re using Unicorn_Binance_Websocket_API to stream price data for 100 cryptocurrencies and two different time frames at the same time. To process this data and store the closing prices of the various cryptocurrencies, you’ll need to use 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 into your favorite programming language.
- Unicorn_Binance_Websocket_API: Install and configure the Unicorn Binance WebSocket API to transmit data for 100 cryptocurrencies and two different time frames.
Step 1: Define the data model
First, let’s define a basic data model that will store the closing prices of the various cryptocurrencies. Create a new contract using Solidity (Ethereum’s programming language).
pragma solidity ^0.8.0;
contract ClosePrices {
struct CryptoData { .
address token; // cryptocurrency token address
uint256 timestamp; // timestamp when the data was received
uint256 price; // 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 solidity ^0.8.0;
contract ClosePrices {
ClosePrices private _instance; // contract instance
function init() public paid {
_instance = ClosePrices();
} }
mapping ( address => CryptoData ) public closePrices ;
} }
Step 3: Subscribe to Binance Websocket
Use the Unicorn Binance WebSocket API subscribe method to establish a subscription for the price data. Make sure to handle errors and exceptions properly.
pragma solidity ^0.8.0;
contract ClosePrices {
ClosePrices private _instance; // contract instance
function init() public paid {
_instance = ClosePrices();
} }
mapping ( address => CryptoData ) public closePrices ;
event NewPrice ( address indexed token , uint256 price ) ;
function subscribe() public paid {
// Subscribe to Binance WebSocket for price data
try (new Unicorns.BinanceWebsocketAPI("YOUR_API_KEY", "YOUR_API_SECRET")) {
_instance.subscribe(
address ( this ), // contract that subscribed to the event
ClosePrices . NewPrice , // event name
function ( address token , uint256 price ) public { {
emit NewPrice ( token , price ) ;
} }
);
} catch (error) {
revert error;
} }
} }
// Optional: Set a 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 pricing data you receive. For example, you can update a mapping or emit events as needed.
“`solidity
pragma solidity ^0.8.
