build a simple blockchain that shows the fundamental concepts of the blockchain data structure used by many blockchain apps like Bitcoin.
a blockchain is a data structure where information is stored in a relatively new kind way.
The basic concept of blockchain is quite simple: a distributed database that maintains a continuously growing list of ordered records. However, it is easy to get mixed up as usually when we talk about blockchains we also talk about the problems we are trying to solve with them. This is the case in the popular blockchain-based projects such as Bitcoin and Ethereum . The term “blockchain” is usually strongly tied to concepts like transactions, smart contracts or cryptocurrencies.
demo at https://anders.com/blockchain/