ANU#51 — Blockchain Safety, UI Subscriptions & New Wallet Screen

AppCoins Wallet
4 min readDec 18, 2019


Welcome to the AppCoins News Update, ‘ANU’ for short. This week, we’ve focused on new subscriptions for UI, blockchain safety and a new wallet screen.

Since the last ANU, the AppCoins team has been working on the following improvements:

Blockchain safety

Ensuring the overall safety of the ecosystem has always been a top priority for us. Therefore, in order to make the ecosystem even safer we have separated our backend into two different infrastructures: backend and “safe”.

We keep all the sensitive information and critical actions in the “safe”, which is more isolated and robust than the backend. But why is there a need for a “safe”? A few weeks ago we noticed that we were having delayed response times while processing payments. Ultimately, we couldn’t even handle some user’s requests trying to perform a payment!

This issue was caused by huge spikes of heavy requests on, probably a Denial of Service (DoS) attack or just a multitude of really interested users. Nevertheless, we have to be resilient to those sort of attacks and that’s where our “safe” comes in.

UI Subscriptions

This week we welcome you to a completely new feature… subscriptions!
This feature is still under development but here is a sneak peek:

Once the feature is implemented, users will be able to manage all their subscriptions in a single place. When they open a subscription, they’ll find a complete set of details, including: the recurrent amount, the next payment date and the corresponding payment method used.

If for some reason a user wants to cancel a subscription, they’ll be able to do so in the subscription details section. And not to worry, users are able to resume their subscription anytime (in case they were to change their mind!).

In the near future users will be able to see if their favorite games support subscriptions. We’re working on this, so stay tuned!

New wallet screen

The team felt that the previous “Wallets” screen was lacking information about each wallet and most of the time it was not clear if the wallet the user wanted to delete was in fact the one they were indeed deleting. The team also felt that the process of importing a wallet could lead to some confusion.

To avoid those problems, and to have most of the wallet information in one place, we decided to remove the previous “Wallets” screen from the “Settings” and create a new entry point where users can see, import, create and remove a wallet.

This entry point was previously called “Balance” — now called “Wallets” — and now has a bottom sheet with the list of wallets, displaying the balance of each wallet right beneath. Here’s how it looks:

As always, you’re invited to follow our work regarding all of the products we’re working on:

Published artifacts:

At the time of writing, the current market cap is close to $2,280M USD, with $38,588 USD in volume in the last 24 hours across these exchanges: Binance (78,53%), Huobi (20,95%), HitBTC (0,29%) and Kyber Network (0,03%).

Since the last ANU, APPC value has witnessed a high of $0.031 USD on December 8th, and a low of $0.025 USD on December 17th. You can see more info about APPC markets at Coinmarketcap.

Name: Sofia Cordeiro
Role: Developer Support
Bio: Sofia Cordeiro has been part of the Go-to Market team for two months now. She works in Developer Support and is responsible for testing and reporting problems with Apps that are looking to join the Catappult ecosystem. She is also currently completing her Degree in Computer Science and Business Management at ISCTE — IUL.



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