Subscribe to the Ardan Labs Insider

You’ll get our FREE Video Series & special offers on upcoming training events along with notifications on our latest blog posts.

Included in your subscription
  • Access to our free video previews
  • Updates on our latest blog posts
  • Discounts on upcoming events

Valid email required.

Submit failed. Try again or message us directly at

Thank You for Subscribing

Check your email for confirmation.

Ultimate Go: Advanced Engineering Episode 15

Author image

Cheikh Seck


In episode 14, Bill architected a solution to digitally sign the transactions on his blockchain. His solution retrieved the private key by : loading private key data from disk, parsing the key data and returning the ECDSA private key. The private key is then used to generate the signature of a transaction. While writing the code to perform this functionality, Bill highlighted how a blockchain node can use a transaction’s signature to extrapolate the public key.

In this video, Bill will implement a solution to ensure all of his blockchain users are given unique identifiers in a distributed environment. This solution consists of calculating a unique identifier from a public key. The first step he’ll take will be to extract the public key from a transaction’s signature. To perform this, Bill will make use of the functions found in the Go Ethereum library and the previous blockchain project. Watch and learn how to calculate a user’s address from their public key.

Things you will learn in this video

  • How to read a public key from a signature.
  • Validate origin of a transaction.
  • Generate a user’s address from a public key.


Go Training

We have taught Go to thousands of developers all around the world since 2014. There is no other company that has been doing it longer and our material has proven to help jump start developers 6 to 12 months ahead of their knowledge of Go. We know what knowledge developers need in order to be productive and efficient when writing software in Go.

Our classes are perfect for both experienced and beginning engineers. We start every class from the beginning and get very detailed about the internals, mechanics, specification, guidelines, best practices and design philosophies. We cover a lot about "if performance matters" with a focus on mechanical sympathy, data oriented design, decoupling and writing production software.

Capital One
Red Ventures

Interested in Ultimate Go Corporate Training and special pricing?

Let’s Talk Corporate Training!

Join Our Online
Education Program

Our courses have been designed from training over 30,000 engineers since 2013, and they go beyond just being a language course. Our goal is to challenge every student to think about what they are doing and why.