17. Smart contracts
contract source code를 다른 nw에 deploy함=> contract instance가 생성
(class-instance와 유사한 관계)
we then create instances or copies of that class by deploying them to a specific network
18. The solidity pg language
Solidity
솔리디티로 스마트컨트랙 정의를 해줌
-> 정의한 솔리디티를 컴파일러로 돌림
-> 2개의 파일로 나눠짐
1. 바이트 코드
2. ABI
=key for writing applications that can interact with these deployed smart contract
=how we can interact with contract
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