Mastering Blockchain Programming with Solidity

When to use blockchain

As we have looked into the double-spending problem, blockchain technology solves this problem and opens new opportunities to create programs/systems where we can remove the trusted parties and make value transfers between two people directly.

The first implementation of blockchain is the Bitcoin blockchain. The Bitcoin blockchain solves the problem of making value transfers. A person can transfer bitcoins (these have some value) to another person without needing a middle party to process the transaction. Because trust is now transferred from middle parties (TTP) to the blockchain decentralized network, which uses a consensus algorithm called PoW to ensure the trust and safety of transactions.

The Ethereum blockchain, ...