In the previous chapter, you saw what a smart contract is, how it works, and how to create one. In this chapter, you will learn one good use case of a smart contract and at the same time learn some advanced techniques in Solidity.
Recall from Chapter 2 that data stored on the blockchain is immutable. Therefore, the blockchain is a good store of proofs. A good use case is storing educational credentials of students on the blockchain.
Recently, there ...
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