Polkadot Decoded keynotes, nomination pool updates, validator entities, and more — See the full list of monthly staking updates here. These updates have been written by Kian Paimani and Ross Bulat from Parity Technologies. Reach out to us for any comment or feedback! Staking Presentations at Polkadot Decoded The biggest Polkadot event of the year happened in multiple locations worldwide in late June, and there were…

This product is a work in progress, designed to communicate ideas, generate feedback, and define a solid foundation for application-side Polkadot. Opinionated vs Unopinionated Dapps The question of how opinionated a decentralised app should be plagues front end developers in an effort to find the right balance between usability and maintaining decentralised sources of…

This product is a work in progress, designed to communicate ideas, generate feedback, and define a solid foundation for application-side Polkadot. Introduction This project lays down foundations and initial direction for a Polkadot front end application pathway, focusing on the Staking use case. Interface design has been considered in detail alongside…

How to handle common data aggregation tasks in MongoDB as data scales — MongoDB is the dominant database adopting the document data model in use today. Even Mongo’s homepage title states their solution is the most popular database for modern apps, and this is hard to argue against given the success of the database and surrounding ecosystem of tools that facilitate all stages…

How to validate in-app purchases server side for Google Play apps — Introduction In-app purchase validation is a critical task that every app supporting purchases and subscription should implement as a means to prove the integrity of purchase tokens and transaction records. Validation can be used to validate a newly created transaction or validate a subscription to check it is still active. An…

How to implement Expo In App Purchases and Subscriptions for iOS and Android — In-app purchases and subscriptions in 2021: Time for a change? After more than a year of using react-native-iap as my React Nativ e in-app purchase solution, I recently decided to migrate to expo-in-app-purchases to resolve a number of issues I was facing with the former package. It is evident from my development journey that expo-in-app-purchases is the better package to…

Create sets of themes and inject them as one object into React theme providers — Introduction In this article I will share a deep merging solution for adding sets of themes to your React apps. By deep merging multiple theme objects hosted in different files that adhere to a common theme structure, you can keep sets of themes separate and scale your theme capabilities with ease. …

Learn what conditionals are and how they are used in TypeScript — Conditionals in TypeScript, also introduced in the TypeScript handbook, allow us to deterministically define types depending on what parameterised types consist of. The general basic rule is: type ConditionalType = T extends U ? X : Y If parameter T extends some type U, then assign X, otherwise assign Y. …

How to use keyof, in, and extends keywords to type dynamic functions in TypeScript — TypeScript gained popularity over 2020 and is now in the upper bracket of the programming salary range. If you are a JavaScript developer you have most likely been exposed to TypeScript in some project you have worked on. This article, along with others surrounding it, will introduce the reader to…