What is Blockchain??

What is Blockchain? Blockchain is a next big thing right now after the internet. Those who understood the potential of internet in it's early days are millionaires if not billionaires already. You will learn everything that you need to know about Blockchain.

What is a Hash??

Hash is the backbone of Blockchain. All the Blocks in Blockchain are connected via Hashes. So, What is a hash? The hash function takes an input string of any length and converts it into a fixed-length output of 32 bytes.

What is Double Spending and How Bitcoin Solves it??

There have been attempts to create digital money in the past but they have always failed. In 2009, Bitcoin was designed anonymously under the pseudonym Satoshi Nakamoto. Satoshi had figured out, how to solve the Double spending Problem.

Bitcoin Transaction Life Cycle?

What is Coinbase Transaction??

Coinbase Transaction is a special type of transaction. Miners create this transaction to reward themself when they successfully mine a Block.

What is UTXO??

In simple terms, UTXOs are outputs. When someone transfers you Bitcoin that output in their transaction is UTXO.

What is Mempool?

What is Mining or Proof of work??

Bitcoin miners run complex computer rigs to solve complicated puzzles in an effort to confirm groups of transactions called blocks; upon success, these blocks are added to the blockchain record and the miners are rewarded with a small number of bitcoins.

How to Add Transactions in Block?

How to Resolve Conflicts between miners??

When 2 Blocks are mined at the same time by two different miners that there will be a conflict between miners.

What is 51% Attack?

Code Blockchain in Python?

By now you must have got an understanding how blockchain works. This is tutorial you will learn how to create Basic Blockchain in Python

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What is Blockchain?

Blockchain is the next big thing happening right now after the internet. Those who understood the potential of internet in it’s early days are millionaires if not billionaires already. Amazon is the perfect example which started as an online book selling company and now ruling the ecommerce industry. You will learn everything that you need to know about Blockchain in this course. There is a shortage of Blockchain developers and companies are willing to pay lucrative salaries. There are so many opportunities for developer, investors, students or researchers right now in Blockchain space, If you’re planning to learn about Blockchain, this is the perfect time to do so and reap the benefits in future. There have been attempts to create digital money in past but they have always failed. In 2009, Bitcoin was designed anonymously under the pseudonym Satoshi Nakamoto. Bitcoin is the first application on Blockchain that enabled users to transfer money without going through any Bank or third party. You can send money to anyone in the world in Bitcoins instantly. On August 6th 2020, Someone transferred a Billion Dollars in Bitcoin for less than $5, isn’t that awesome?  You cannot imagine of transferring this amount of money in our traditional Banking system without paying hefty amount of fee and then wait for days. 

What is Blockchain?
What is Blockchain?

What is Blockchain?  Blockchain is a distributed ledger technology. What do I mean by Distributed Ledger Technology. Unlike traditional ways, companies stored data on centralized location, Blockchain stores data on 1000’s of nodes or servers. Even if 1 or 10 nodes go down because of any issue, your applications will still be served by other nodes available on the network which means no government has any control over Bitcoins and no one can shut this down because of it’s decentralized architecture. On 4th October 2021, all Facebook services were down because of network outage which took 6 hours to resolve. So many business lost money because of their business dependency on Facebook, Instagram, WhatsApp. This is not the only feature of Blockchain, there are many, lets dive right into it.  A blockchain is essentially a digital ledger of transactions that is duplicated and distributed across the entire network of computer systems on the blockchain. Each block in the chain contains a number of transactions, and every time a new transaction occurs on the blockchain, a record of that transaction is added to every participant’s ledger. The decentralized database managed by multiple participants is known as Distributed Ledger Technology (DLT).

blockchain-immutable-distributed.png
Image Credit to Blockgeeks.com

Immutable and Distributed design is the backbone of Blockchain. Once a Transaction is recorded in Blockchain it cannot be changed by any means because even if you manage to change the transaction on your computer other Computers won’t accept your changed transaction as they have their own record of the transactions. Why blockchain is important: Business runs on information. The faster it’s received and the more accurate it is, the better. Blockchain is ideal for delivering that information because it provides immediate, shared and completely transparent information stored on an immutable ledger that can be accessed only by permissioned network members. A blockchain network can track orders, payments, accounts, production and much more. And because members share a single view of the truth, you can see all details of a transaction end to end, giving you greater confidence, as well as new efficiencies and opportunities.

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