Hands-On Blockchain for Python Developers

Other types of blockchain programmers

This chapter intended to give you an intuitive understanding of how blockchain works. However, it's not a complete scope of how it works. My explanation differs quite a lot from how Bitcoin works (and even Ethereum). Ethereum does not use SHA-256 for hashing; it commonly uses the Keccak-256 algorithm. In our case, we only put one history/transaction/payload in one block, but Bitcoin can save more than 1,000 transactions in one block. Then, we generate a private key and public key by using RSA cryptography, while Bitcoin and Ethereum use elliptic curve cryptography. In our case, the payload is history (who likes/loves/hates an animal), but in Bitcoin it's a transaction that has a dependency on the previous ...