Lecture 4: Summary and conclusion of Day 1
==========================================

What have we seen today?
------------------------

Day 1 have been an introduction to blockchains and smart contracts

- We saw that blockchains were community network
    - All data is shared among the participants (nodes)
- With smart contracts, we can build own own applications on top of blockchains
    - Smart contracts are actual code written by developers
    - Smart contracts creations and calls leverage the same transaction mechanism used to send money to someone
    - You can call smart contracts directly from your program