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Endgame, a non-custodial NFT rentals marketplace, recently went through an audit with Code4rena. During the course of the audit, a vulnerability was surfaced which showed that if a Seaport order was set to PARTIAL_RESTRICTED, it could be used to replay the order on Endgame

More shop talk today. We’re going to have some fun with End-to-End testing blockchain applications. What I’m not going to write about is testing philosophy. The discourse on why, what and how to test is saturated enough. I’ll just leave it at the following.

In my previous post, I discussed the high level architecture of the Endgame protocol, a non-custodial NFT rentals marketplace. Since Endgame adheres to the Default Framework specification, the protocol’s business logic is separated from its contract storage. By doing so, we afford the protocol

In my previous posts, I have been writing some technical deep dives into core aspects of the Endgame protocol, such as hook implementations and rental transactions. Now, I want to take a step back and give an overview of the novel smart contract architecture

It’s strange. When we think about code it oftentimes evokes a sense of rigidness. A rule-bound universe where processes, inputs, outputs, are predictable things. The same input produces the same output. Paradoxically, the act of coding is anything but rigid. It’s an extremely creative

Endgame, a brand-new NFT rentals marketplace, is 021’s latest product that facilitates non-custodial rentals. We accomplished this by building the protocol on top of some of the industry’s biggest giants, namely, Seaport and Safe. In this post, I will be focusing on how we

As I mentioned in my hook overview post here, hooks are custom-built contracts that can act as middleware during the rental lifecycle of one or more NFT collections. In this post, I will go over an implementation for how to create one of these

For the past 8 months, I have been working on the smart contract protocol for 021’s latest product, Endgame, which is an NFT rentals marketplace powered by Seaport and Safe. Endgame is designed to be a highly extensible protocol with a focus on allowing

Gm all! Now that we’ve released our 021 Endgame rentals protocol into the wild we figured it was high time to get some word out concerning some of the choices and trade-offs we made while building it. This article will focus in on some

As the onchain world hurtles forward, embracing new digital ways of interacting, the spotlight is on privacy and security. At the heart of this exciting tech wave is zero-knowledge technology. It’s a game-changer in cryptography, allowing for data verification without giving away any secrets.

Learn about the key ERC token standards that shape the Ethereum blockchain. Our guide covers everything from ERC-20 to ERC-6551, detailing how these protocols enable developers to build sophisticated and interoperable applications.