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MetaMask locked - transactions stuck on pending

22 Mar 2019

MetaMask is the state-of-art tool for dApss. It usually have problems with nonce and gas fee when we using non-ehtereum networks. Accounts get stuck on an invalid transaction and the transactions that follow are never broadcasted. In this post I explain how to recover the funds and tokens that are blocked in an account that got locked.


Solidity and TDD - How to build a smart contract

18 Mar 2019

The task of writing smart contracts entails the difficulty of maintaining the authenticity of the code against infinite cases. Contracts are part of a public network and expose their vulnerabilities to any attacker, and this becomes critical when it comes to money. This is why the practice of TDD is one of our best friends when developing our smart contracts.


RSK Name Service Intro

19 Dec 2018

RSK Name Service (RNS) proporciona una arquitectura que permite la identificación de direcciones RSK mediante nombres legibles por personas. El objetivo de esta intro es a hacer un overview de los conceptos básicos para entender que es RNS y como se usa.


JS Beginners - Class 1

26 Oct 2018

This is the begining of a little programming course for beginners. I will publish some classes explaining the basis of programming and an introduction to JavaScript programming language, used in many contexts like web browsers to build interactive web pages.


Clean Up Xamarin.Forms

08 Jun 2018

This is a simple example about how to clean up the Xamarin.Forms default new solution content, before first commit. This is an easy good practice, it will solve many problems later. Follow each step checking commit after each task.


Xamarin social sharing

05 Jun 2018

One of the key points to make our app grow in users is to get spread through social networks: WhatsApp, Facebook, Twitter, and so on. In this tutorial we are going to learn how to place a native share button in our apps.

  • Encourage your users to share your app content.
  • Make it easy for them to tell their close people about your app.
  • Convert shares in new shares.
  • Reach new people.


Xamarin with Google Analytics

04 Jun 2018

Our goal is to get closer to users and provide them the best application. We need to know what pages they prefer to enter, which ads they mostly click on, at what time and where they open our app, how they move within the app features… the more data we can compile, the better is the product we can offer. Google Analytics is a free web and mobile analytics tool offered by Google to help us analyze our traffic. In this Xamarin.Forms tutorial we are going to connect our app to Google Analytics service.


Xamarin Radio Streaming Player

23 May 2018

In this Xamarin tutorial we are going to create a simple radio streaming player app for iOS and Android. The radio will have 3 simple actions: Play, Stop and Pause.