Blockchain technology has significantly changed the entire cryptographic space. Its key features are simplicity, decentralization, security, and immutability. It is these qualities that have brought technology great popularity.

Smart Contracts are immutable, transparent, secure, and decentralized. Follow this example to learn how to write them with the programming language solidity.

Contracts that use the tx.origin to authorize users are vulnerable to phishing attacks.

Reentrancy attack is one of the most destructive attacks in Solidity smart contract. It occurs when a function makes an external call to another

Overflow is a situation when uint reaches its byte size. Then the next element added will return the first variable element. This is only for <0.8 Solidity.

Claim ownership of the contract. Reduce the balance of the contract to 0.

The attacker can create a contract with a selfdestruct() function, send ether to it, call selfdestruct(target) and force ether to be sent to a target.

This is the second part of my series around Ethernaut Game. In this post, we will deal with Level 2: Fallout.

In level 3 you have to play a game: coin flip. To complete this level you'll need to guess the correct outcome of a coin flip 10 times in a row

In level 4 of the Ethernaut Game, our goal is to claim ownership of the Telephone contract.

In challenge 5 you are given 20 tokens to start with and you will beat the level if you somehow manage to get your hands on any additional tokens.

In this article, I modeled how to visualize codes, and also visually told you how developers or hackers read these codes.

Contract lifecycle management (CLM) is a software-defined, cloud-based project and regulatory management solution to manage contracts. Read on.

In this tutorial we’ll be walking through building and deploying a decentralized lottery smart contract in Solidity using [Hardhat].

It is the auditor’s responsibility to test a smart contract for vulnerabilities after the developers have created it.

Learn about this gasless abstraction of value types in solidity and the operators feature for them.

In this blog post, we will delve deeper into the meanings of tx.origin and msg.sender and why you should learn them too.

This is a step-by-step guide on how to write, compile, test and smart contract to Ethereum testnet using dRPC endpoint and API key.