Practical Blockchains and Cryptocurrencies: Speed Up Your Application Development Process and Develop Distributed Applications with Confidence

© Karan Singh Garewal 2020

K. S. GarewalPractical Blockchains and Cryptocurrencieshttps://doi.org/10.1007/978-1-4842-5893-4_12

12. The Chainstate

Karan Singh Garewal¹ 

(1)

Toronto, ON, Canada

 

In the previous chapter, we implemented program code that validated the integrity of transactions. There was a significant omission in this code, we did not address the issue of how unspent values from a previous transaction are obtained, and we also did not address the matter of validating the unspent values in previous transactions. The reason for this omission is that unspent values are implemented in a key-value store. In this chapter, we will rectify this deficiency by implementing a key-value store for transactions. We will also implement a key-value store ...