BlockCAT: Ethereum Smart Contracts For Everyone

BlockCAT: Ethereum Smart Contracts For Everyone

Ethereum is the next big step for decentralization. Thanks to its smart contracts, anyone – anywhere – can provide advanced services, manage assets, and prevent conflicts that could arise from malicious users; without trusting in a third party. But here’s the problem: it takes advanced computer programming skills to write and deploy a smart contract, and even the most experienced programmers can make mistakes that result in loss of assets,…

Ethereum Smart Contract Code Review #1 – Real World CTF 2018

Ethereum Smart Contract Code Review #1 – Real World CTF 2018

When the CTF started we looked at the challenges and I already suspected, just because it’sin-style right now, that there could be an ethereum smart contract challenge.And there was!Acoraida Monica.So I didn’t even look at the rest and just decided to go for it.In the end I didn’t solve the challenge during the two days of CTF, so in this firstvideo I want to tell you about my failed attempts,…

OnTrack – Ethereum Dapp – Part 2 – Smart Contract Testing

Hello, I am Loredana and today I will show you how to set up your local environment fortesting smart contracts, using Mist and Remix.I have recently started building decentralized apps with Ethereum and wanted to share someinsights about the process.To learn more about the OnTrack contract that I will be testing today, check out the Part1 video of the series.We will first set up a private Ethereum node and then…

OnTrack – Ethereum Dapp – Part 1 – Smart Contract Code

OnTrack – Ethereum Dapp – Part 1 – Smart Contract Code

Hello, I am Loredana and today I will show you an example of a smart contract writtenin Solidity.I have recently started building decentralized apps with Ethereum and wanted to share someinsights about the process.In this video, I will just go through the code I wrote in Solidity and understand whatis happening (show diagrams).In later videos, we will show some existing options for development and testing smartcontracts and Dapps.In short, the…

Ethereum Smart Contract Backdoored Using Malicious Constructor

Ethereum Smart Contract Backdoored Using Malicious Constructor

In this video I want to specifically talk about the interesting backdoor technique thatwas used in the Acoraida Monica smart contract, which was a CTF challenge from the Real WorldCTF finals.I have already created two videos where I go over my attempts at solving the challengeand then eventually walk through the solution.However I did not properly explain how the contract was actually backdoored, partiallybecause I didn’t fully understand it.At some…

Beginners Guide to Solidity Development 1 ● Introduction to Ethereum, Smart Contracts and Solidity

Beginners Guide to Solidity Development 1 ● Introduction to Ethereum, Smart Contracts and Solidity

The token or explains a beginner’s guide to developing smart contracts using the solidity programming language on top of the ethereum blockchain platformIn this first episode, I will introduce aetherium and the concepts smart contracts and solidity to youFirst some background info about this guidethis guide will be a practical guide to quickly develop your own smart contracts as such we will not go into a lot oftheoretical background about…

Ethereum Blockchain: Where account data and address of smart contract is stored

Ethereum Blockchain: Where account data and address of smart contract is stored

hello everyone in the last video I showed you how to create private blockchain data andcreate private network to using private chain and also create some account fordeploy smart contract if you don’t know about that information you can watchthat video again and back to this video in this video I’ll show you where’s theaccount information is stored and also the address of smart contract is storedfirst of all I…

Earn or invest ether crypto-currency – advertising smart contract on Ethereum blockchain

Earn or invest ether crypto-currency – advertising smart contract on Ethereum blockchain

welcome to the millimeter homepage –a decentralized advertising platform whereanybody can advertise, invest, and earnmoney. how it works?the advertising space is thousand pixelswide and thousand pixels high. you canbuy these pixels place ads, sell pixelswith no commission or maybe rent themout. pixels are owned for life – just like realproperty.this is guaranteed by the underlyingsmart contract powered by the Ethereumblockchain. another part of the smartcontract says that the platform itself…

How To Code Ethereum Election Smart Contract – Live Coding

– Now, for the coding demo, I will actually walk you guysthrough a contract to do a simple election, so in orderto do this, you guys can follow along if you want to.Basically, you just need to open up a web browserand go to Remix.ethereum.orgor you can just Google Remix ethereum in Google,and that should take you to a web page that looks like this,so Remix is basically an online…