Building a blockchain isn’t one of the easy tasks you embark on but I assure you that it is something you will enjoy doing. I guess you are here because you have been wondering how blockchain works and you really want to have this mystery unraveled. I have a lot of people approach me with the question “how do I make my own blockchain “. To learn how blockchain works, you need to be persistent and patient, it is surely something you won’t regret learning. This guide will show you how it works and walk you through the processes of building one. It is important that you understand what blockchain really means. It is chain of files and data joined together using hashes.
Before you proceed with the “how to make my own blockchain “search, you need to be familiar with the following terms.
- Date of creation- This represents Unix format, the current and time. It is essential for the development of your chain in future as it makes it easy for you to add a new block when you have many nodes running. In this case, the node automatically uses the data of creation to determine which block to use.
- Nonce- This refers to the set of symbols required to be added to the block in order to build a good checksum. For instance, if nonce value is stated to be 3, it means that 3 zeros have to be added the data block in order to calculate the checksum.
- Checksum- Checksum is also referred to as hash. It is a block data that consists of checksum of previous block and nonce. To avoid being rewritten, the SHA256 protects the ledger chain by calculating the checksum and comparing it with the new block to see if they match. if they match, the block will then be added to the blockchain.
- Proof of work- This is also known as PoW. It is used to check the validity of new chains and the operations in the block chain network. The PoW adds complexity to a building block and lowers the load on the server.
When I want to answer the “how do I make my own blockchain“question, I start by telling people that the first step in creating a blockchain is to create a class for a block with a constructor. There will also be a way for calculating the property and checksum to ensure they are valid (they are considered to be valid if they have the right number of zeros and can calculate and compare the current with the calculated).The constructor only takes a previous block and a current block data and uses zero as the initial value of nonce. After a block is created, new blocks are added. Building a blockchain has been simplified by polkadot. Polkadot allows diverse blockchains to transfer messages and also provides a Relay Chain on which the number of verifiable data structures can be hosted. There is no limit on the number of chains polkadot network can connect. Building blockchain just got easier with Polkadot