Yogesh Kulkarni

Reentrancy Attack – Hacking Smart Contracts [Solidity]

by

You can check out the code for this article on our GitHub. Preamble This post is part 3 in continuation of our Smart Contract Security Series. This post is part 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 … Read more

Private Variable Exploit – Hacking Smart Contracts in Solidity

by

Introduction This post is part 2 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 In this part 2 of the series, we’ll examine how to exploit the “private” vulnerability in Solidity. As the name suggests, private … Read more

Ownership Exploit in Solidity Smart Contracts

by

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

by

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

by

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

Common Consensus Mechanisms in Blockchains

by

We know what a blockchain is and its wide applications. Blockchain is a distributed computing technology involving multiple nodes distributed across geographies. The problem is to ensure that each node gets the exact copy of the data. Hence, some protocol is needed to achieve this unison or consensus. This post tries to cover the need … Read more

Bollinger Bands Algorithm – Python Binance API for Crypto Trading

by

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

by

MACD is a trend-following momentum indicator used for trading. It consists of two lines: This article is based on the full trading tutorial on the Not-Satoshi blog. Introduction Before we begin, I would like to make a small request ##################### Disclaimer!! ################################### # The bots built here with python should be used only as a … Read more

Simple Moving Average (SMA) – Python Binance API for Crypto Trading

by

A simple moving average (SMA) is calculated by summing over a fixed number of last prices, say k, and dividing this by the number of prices k. Depending on the selection k, you can obtain short-term or long-term SMAs. Short-term SMAs respond quickly whereas long-term SMAs respond slowly to changes in the prices. You can … Read more