This is part 4 of my blog posts series in which we create a blockchain in Javascript. In the previous blog posts, we added wallets and mining rewards to our simple blockchain. But the current implementation doesn't validate transactions. We can effectively spend money from someone else's wallet! Let's fix that.
About a week ago I found out that Troy Hunt had published a new course about modern web security. I decided to check out the introduction video and that made me realize that I don't have a Content Security Policy (CSP) for my website. In fact, I was missing a lot of security headers... Time to get up to speed!
This is part 3 of my blog posts series in which we create a blockchain in Javascript. In the previous blog posts we created a simple blockchain and implemented proof-of-work to protect it from spammers and attackers. However we made some shortcuts along the way: our blockchain can only store 1 transaction in a block and there are no rewards for miners. Let’s fix that!
Exactly 2 years ago I started my YouTube channel and a year ago I published a blog post called "My first year on YouTube" where I wrote about what I had achieved and what my goals were for the upcoming year. So this year I’m doing the same and also adding the goals for my blog & Udemy.
