Lottery, Fomo3D & Rock Paper Scissors Solidity tutorials - Have you ever dreamed of running your own decentralized casino? Checkout these tutorials! Building a decentralized reddit Part 3 - Tutorial on how to build a reddit Dapp using EmbarksJS, an alternative framework for building smart contract EthBnb Tutorial - Tutorial for developing…

You know Rock paper scissors right? If you don't, that's a simple game where in each round 2 players make one of 3 moves: rock paper scissors Paper beats rock, scissors beat paper, and rock beats scissors. You can also bet money in each round, to make it more interesting.…

Have you heard of Fomo3D? This is a famous lottery Dapp on Ethereum where the last player to invest in a round win the jackpot! By the way, don't freak out if you visit the page of Fomo3d and see references to "scam". This is just some provocative marketing. This…

This video is a tutorial to build a lottery smart contract in Solidity. The rules are simples. In each round of the lottery, anybody can send Ether to the smart contract. When enough participants have sent their money, the lottery will determine a winner and send him/her a prize. The…

In this video, I will teach you how to build a smart contract to organize events.There will be 2 types of users: event organizers customers Event organizers will be able to organize events and sell tickets. Customers will be able to not only buy tickets from the event organizers but…

In this video we will create a loan smart contract with Solidity. There will be 2 kind of parties interacting with the smart contract: investors borrowers The investor will send Ether at the beginning of the loan, and at the end the borrower will reimburse the investor of the initial…

Dates are a bit weird in Solidity. Solidity does have some keywords for working with dates, like now, or 1 day, but it does not have a native date type. Instead, dates are represented as integers, using timestamps in seconds. In our Truffle tests, we need to be able to…

In the last video of the smart contract testing series I showed you the basic usage of the Big Number library to deal with integers. But Big Number has many more trick up his sleeves :) In this video, I will show you all these tricks so that you feel…

In Solidity smart contract, you might have to deal with huge numbers, especially when doing financial transfers. Don't forget that we need to specify Ether transfers in Wei, a fundamental unit equals to 1 * 10 ^ -18 Ether, so very quickly even small financial values can lead to big…

In this article, I will walk you through the code of the Etherdelta smart contract: ERC20 token transfers, orders creation, and trades settlement. The smart contract is written in Solidity, and the repo is publicly accessible on the Github of Etherdelta. Decentralized exchanges are one of the most fascinating Blockchain…