Create And Sign Bitcoin Transactions With Golang

About a month ago I had written about creating and importing private keys as well as generating public addresses for Bitcoin and several other cryptocurrencies using the Go programming language. This previous tutorial had more of an emphasis on creating cryptocurrency wallets with Golang than anything.

The next step in making Bitcoin and other cryptocurrencies useful is to be able to transfer or send them to other people. Sending Bitcoin is part of a process known as creating and broadcasting a transaction.

While we won’t be actually broadcasting a transaction in this tutorial, we’re going to figure out how to create an unsigned transaction, then sign it, using the Go programming language and some popular Bitcoin packages.

Use Node.js And A Raspberry Pi Zero W To Scan For BLE iBeacon Devices

Earlier this month I had written a tutorial for detecting nearby BLE iBeacon devices using a Raspberry Pi Zero W and an application written with Golang. It was a great example of accomplishing something with Go and very little code.

Scanning for BLE devices is a great use case for Internet of Things (IoT) devices like the Raspberry Pi Zero W, and Golang isn’t the only great language around. I, like many others, do a lot of Node.js development as well.

We’re going to see how to scan for BLE iBeacon devices using Node.js and the popular Node.js BLE (Noble) library.

Install Node.js On A Raspberry Pi Zero W Without NodeSource

A few weeks ago I thought I’d try to install Node.js on my Raspberry Pi Zero W to use it as a simple API server that I could take with me on the road. I have installed Node.js so many times before, including on a standard Raspberry Pi, that I figured it would be just as easy to do on the Pi Zero.

I was mistaken in regards to the difficulty.

On the Raspberry Pi Zero W, Node.js was nowhere to be found in apt-get and the scripts that used NodeSource in the official install documentation didn’t work because ARMv6l is no longer supported by NodeSource.

We’re going to see how to install Node.js on a Raspberry Pi Zero W when everything else fails.

Resolve Google AdSense Publisher Violations For Valuable Inventory Problems

I don’t typically write about these topics since they aren’t on the subject of development and operations, but this week Google AdSense put my account on restricted probation for violating its policies, something I hadn’t intentionally planned on doing.

After receiving an email from Google and visiting the policy area of the Google AdSense dashboard, I learned that I had a Valuable Inventory: No Content violation for a domain that wasn’t mine and I hadn’t even heard of.

So what do you do when you’re in violation for something you do and don’t have control over?

We’re going to see some of the things that you can do to keep your account in good standing, beyond the obvious things such as being annoying.

Connect To A Raspberry Pi Zero With A PiUART Module

As you’re probably well aware from my previous Raspberry Pi articles, I’m a hoarder. I have several Raspberry Pi Zero as well as the wireless edition and various attachments that go with them.

When I was first getting started with the original Pi Zero, I had a tough time trying to figure out how to connect to it. I mean, how do you connect to something that doesn’t have some kind of internet connect?

I had written two articles previously for connecting to a Raspberry Pi Zero. The first titled, Connect to a Raspberry Pi Zero with a USB Cable and SSH, demonstrated how to connect with nothing more than a USB cable. The second titled, Connect to a Raspberry Pi and Pi Zero with a USB to TTL Serial Cable, demonstrated using GPIO pins and a serial cable to connect.

We’re going to simplify the connection process by using a nifty PiUART module and eliminate any complicated wiring or software configurations.

Generate Cryptocurrency Private Keys And Public Addresses With Golang

Over the past month or so I’ve demonstrated how to generate address information for a variety of cryptocurrency Altcoins using technologies like Node.js, Vue.js, and Angular. The thing about my previous tutorials are that they all used the JavaScript stack in some sense. What if we wanted to adventure into other technologies like Golang?

The process for generating key and address information for Bitcoin and popular Altcoins is pretty much the same. In reality, the difference is defined by the private key and public key prefix information, typically associated to a network.

We’re going to see how to generate and import private keys for a variety of cryptocurrency coins as well as their addresses using the Go programming language.

TPDP Episode #17: Going FaaS On Serverless With OpenWhisk

I am pleased to announce that the latest episode of The Polyglot Developer Podcast is now available for download. The episode titled, Going FaaS on Serverless with OpenWhisk focuses on the development and deployment of functions to be deployed on a serverless cloud platform.

In this episode I’m joined by Carlos Santana who is part of the Cloud Functions team at IBM. While Apache OpenWhisk will have an emphasis in this episode, other cloud services are mentioned as well, including AWS Lambda and Azure Functions.