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Summary - BlockChain 101 by Arindam Roy https://www.youtube…

- - - - Mined Block needs to have a valid Nonce to get the
    - - Previous Hash is also appended to data prior calculating Hash
      - Immutable - any change in existing blocks would render the entire Blockchain invalid
        Or The Past is frozen
      - Distributed Blockchain
        
        Same Blockchain held with many Peers
        
        Peers ensure transactional security
        
        Difficult for peers to coordinate view De-centralisation
        
        Tokens
        
        Transaction Record - like Hawala/Hundi
      - CoinBase
        
        1st Block is not validated. Previous is not known.
        
        So, the Blockchain Creator/Peers Mint *initial few *Tokens , this transaction is called Coinbase
        
        Every Peer needs to validate transactions right upto Coinbase before initiating any new transaction
- - - - Select Miners at Random but use the ratio of tokens that each Node is ready to stake to decide probability of getting the next Miner
        
        Punish fraudsters by Slashing their Stakes
      - Cardano,Polkadot
    - - All Nodes/Miners try to solve a crypto puzzle and come 1st
        
        1st position Miner/Node is awarded Mining reward
      - Mining Pool
        
        Centralisation ?
        
        Mining Farms
      - Bitcoin,Ethereum
- - - - Metamask etc