https://youtu.be/qCMbqqU0cYY Smart contract security - Most smart contract developers write insecure smart contracts because they dont know much about security. Want to do better than that? Follow my new series on smart contract security on EatTheBlocks Pro. Learn about Overflow, Re-entrancy attack, and more and how to fix these vulnerabilities. Interview…

https://youtu.be/YYZN96g1C7g I have interviewed Raman, the founder of cryptojobslist.com. CryptoJobsList is the first job board for crypto / Blockchain jobs. In this 28 mins interview Raman tells us how he came to create his Blockchain job board, and also give us very valuable tips for finding a crypto job, including…

Previously, we have implemented the main functionality of our split payment smart contract in Solidity. In this video tutorial, we are going to finish smart contract by adding access control. We will use Solidity require() statement for this.

In this video, we will start a smart contract to do split payments. Split payments allow to split an Ether payment into several addresses, with different amounts (i.e recipient addresses can receive different amounts). It can be especially useful for companies who want to pay employees or freelancers in Ether.…

This is the last part of the tutorial on how to build an Ether wallet smart contract. You will learn: how to do an ether transfer in Solidity the different unit of Ether (wei, gwei...)

In the previous episode we started an Ether wallet smart contract, and we can now send Ether to another address. However, everybody can call the send() function and steal all the Ether! Not great... In this video you will learn how to implement access control with the revert() built-in Solidity…

In this video, we will start to code a wallet for Ether, using a Solidity smart contract. You will learn how to send money to another address with the transfer() method of an address variable. with the transfer() method of an address variable.

If a user does not exist, no error is produced. We should change that. In this video you will learn how to use the revert() Solidity construct to produce an error.

https://youtu.be/BOx167NBmew Smart Contract Testing Course - I just released a new course on Solidity smart contract testing on EatTheBlocks Pro. Uses the Test-Driven-Development (TDD) approach. Covers tests in Javascript & Solidity with Truffle  Ethereum 2.0: What you need to know - I wrote this piece on the future of Ethereum…

In the last part of this tutorial we finished all the functionalities of our smart contract. Unfortunately, we have a lot of code duplication in the update and delete function. We use the same for-loop to find a specific entry of our users array. In this video, we will extract…