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(flicker image: IBM Research)

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[Part 1 of 2]

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Let’s unravel the mysterious blockchain by writing our own simple version of it and understand how it works behind the scene.


Ultimately it could lead you to make your own experimental tiny blockchain network and then sky is the limit with what you can really do with it.


  • Blockchain basics (most comprehensive article ever at - Blockgeeks)
  • Javascript fundamentals
  • Enthusiasm :)

Lets Begin

  • Class Blocks (index , timestamp , data , previous hash , hash , nonce)
  • Class Blockchain(appending all the blocks , starting from genesis block)
  • library for calculating hash (sha256)
  • helper functions to use our implemented class

Write our own smart contract(unsplash)

Akshat Jain

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