Introduction to Python Blockchain In the blockchain tutorial, we took a detailed look at the theory behind blockchain. Blockchain is the fundamental building block behind Bitcoin, the world’s most popular digital currency. That tutorial delved into the intricacies of Bitcoin…
Python Blockchain: Creating the Initial Block Let’s assume that the originator of TPCoins initially issued 500 TPCoins to a known client, Dinesh. To do this, he first created a Dinesh instance – Dinesh. Dinesh = Client() Then we create a…
Python Blockchain: Adding a Block Each miner will extract transactions from the previously created transaction pool. To keep track of how many transactions have been mined, we must create a global variable – last_transaction_index = 0 We will now have…
Python Blockchain: Creating Miners To implement mining, we need to develop a mining function. The mining function needs to generate a digest of a given message and provide a proof of work. Let’s discuss this in this chapter. Message Digest…
Creating Multiple Transactions in Python Blockchain Transactions from various clients are queued in the system; miners pick up transactions from this queue and add them to blocks. They then mine the block, and the winning miner is given the privilege…
Python Blockchain: Adding the Initial Block Adding a block to the blockchain involves appending the created block to our TPCoins list. TPCoins.append (block0) Note that, unlike other blocks in the system, the genesis block contains only one transaction, initiated by…
Python Blockchain Block Class A block consists of a variable number of transactions. For simplicity, we will assume that a block consists of a fixed number of transactions, in this case three. Since the block needs to store a list…
Python Blockchain Transaction Class In this chapter, let’s create a Transaction class so that a client can send money to someone. Note that a client can be both a sender and a receiver of money. When you want to receive…
Python Blockchain Client Class Client class generates a private key and a public key using the built-in Python RSA algorithm. Interested readers can refer to this tutorial for an RSA implementation. During object initialization, we create the private and public…
Python Blockchain: Creating a Blockchain A blockchain consists of a list of blocks linked to each other. To store the entire list, we’ll create a list variable called TPCoins – TPCoins = [] We’ll also write a utility method called…