「智能合約是在 EVM (Ethereum Virtual Machine) 中執行的，它是個封閉的環境，所有執行過程都離不開EVM，換句話說，合約沒辦法由 EVM 內部向外界取得任何資料。... 這時有人引入了 Oracle 的概念，讓智能合約能夠透過 Oracle 取得外部資料。透過他們的服務就可以讓合約呼叫外部Web API取得所需資料。」 Tags: 0 comments 9 likes 0 shares Share this: Taipei Ethereum Meetup About author not provided We have regular meeting twice per month on discussing blockchain technology, smart contracts and DApps development! We would love to have you join us! 3460 followers 3097 likes "https://www.meetup.com/Taipei-Ethereum-Meetup/" View all posts