Code your own blockchain in less than 200 lines of Go!

Tutorial

Read our blog post first to see a walkthrough of the code.

Check out our follow-up tutorials:

• Networking
• Proof of Work
• Proof of Stake
• IPFS
• P2P
• Advanced Concepts for Beginners
• Start your own Hyperledger blockchain the Easy Way!
• Build a DApp on Hyperledger the Easy Way!
• Build your own Blockchain Twitter recorder

Deployment steps:

• git clone https://github.com/mycoralhealth/blockchain-tutorial.git
• navigate to this directory and rename the example file mv example.env .env
• go run main.go
• open a web browser and visit http://localhost:8080/
• to write new blocks, send a POST request (I like to use Postman) to http://localhost:8080/ with a JSON payload with BPM as the key and an integer as the value. For example:

  {"BPM":50}

• Send as many requests as you like and refresh your browser to see your blocks grow! Use your actual heart rate (Beats Per Minute) to track it over time.

Screenshot