Ownership Exploit in Solidity Smart Contracts

In the smart contract security series, we will see multiple vulnerabilities, attacks, and exploitations in the smart contracts, along with the prevention measures. This post is part 1 of our Smart Contract Security Series: Ownership Exploit Private Variable Exploit Reentrancy Attack tx.origin Phishing Attack Denial of Service Attack Storage Collision Attack Randomness Attack Replay Attack … Read more

Creating an NFT Marketplace with Solidity and JavaScript

This tutorial shows you how to implement your own prototype of an NFT marketplace with Solidity and JavaScript. You can check out the code on our GitHub: GitHub: https://github.com/finxter/NFTMarketplace For additional help, you can find a full course with explainer videos on the Finxter Computer Science Academy: Video Course: Creating an NFT Marketplace with Solidity … Read more

Ethereum Smart Contracts and EVM

In the previous posts, we developed simple smart contracts, deployed them using Remix or Truffle, and interacted with them using JSON-RPC interface providers such as using web3.py or web3.js. In this post, we shall take a closer examination into how a smart contract works on the Ethereum blockchain at the grass root. More precisely, we … Read more

Bollinger Bands Algorithm – Python Binance API for Crypto Trading

A Bollinger Band consists of three lines: a simple moving average, an upper band, and a lower band. The assumption is that if the real price crosses over one of the bands, this can be seen as a signal to trade in or our of a given asset. For cryptocurrencies, breakout trades are more frequently … Read more

Moving Average Convergence Divergence (MACD) – Python Binance API for Crypto Trading

MACD is a trend-following momentum indicator used for trading. It consists of two lines: The MACD line is calculated by taking the difference between short-term EMA and long-term EMA. Exponential Moving Average (EMA) assigns weights to all the values due to a given factor whereas the latest data point gets the maximum weight, and the … Read more

Python Networking with Sockets

Have you ever wondered what happens in the system when you type https://app.finxter.com/ or https://google.com and press enter in your web browser? This is exactly what we will be covering in Python Networking. How the data flows from HTTP protocol to TCP/IP protocol stack. Then finally over the internet to fetch the data you requested. We discuss … Read more