On December 1, 2020, the long-awaited Beacon Chain was deployed. The Beacon Chain, also known as Phase 0, marks the first phase of Ethereum 2.0. Although the Beacon Chain doesn’t change the Ethereum we use today, it is the first major step to making the transition to proof-of-stake. The Basics Proof-of-stake is…

Meta Gamma Delta was born out of the desire to create a community of humans who could come together from all around the world and make an impact in the blockchain ecosystem in which we all live and thrive. While I’m sure we are collectively grateful that 2020 is over…

What is Meta Gamma Delta DAO? For those of you who don’t know us, we are an inclusive and empowering society supporting women-led projects in the blockchain space. Meta Gamma Delta, or “MGD”, was summoned on February 14th, 2020 ❤️ at ETHDenver. Since that time we’ve onboarded over 35 members (mostly women), from all corners of…

In our most recent smart contract project, we used Solidity 0.6 where I learned about override vs virtual. As always, you can read the docs, but I wanted to write this post for those of us who prefer to read quick tutorials on Medium. Solidity is an object-oriented programming language…

The Oracle Problem? Simply put, an oracle is a provider of data. In the blockchain realm, an oracle is what feeds information from the outside world to a smart contract. Smart contracts are self-executing applications that live on the blockchain and do something when triggered. If a smart contract relies on outside data…

There are two ways a contract can be created in Solidity. They can be created “from outside” by a creator — a developer who is deploying the contract or a user that is interacting with a dApp which deploys the contract on their behalf. They can also be created by…

A few weeks ago, I was fortunate enough to attend the 4th annual Devcon conference in Prague. This was a 4 day conference hosted by the Ethereum Foundation that brought together developers, designers, researchers, community organizers, and even artists from all over the world. I met talented people working on…

In a previous article, we provide a simple guide on how to write unit tests for smart contracts. Luckily, we can use our favorite tools to test smart contracts: the Mocha framework and Chai assertion library. Personally, I love writing tests. There is something satisfying about seeing those little green…

In our Mappings in Solidity article, we gave a quick breakdown of how mappings work and why they are useful. Another important aspect of mappings that often confuses developers is that they cannot be iterated over. Say it with me: “Mappings cannot be iterated over. Mappings cannot be iterated over…