Writing a smart contract is different than developing a normal web application. When developing a normal web application, the motto is move fast and break things. The speed of developing a web application is paramount. If there is a bug in the application, you can always upgrade the application later. Alternatively, if the bug is catastrophic, you can patch it online or take the application offline before introducing a fix. There is a very popular word to describe the ideal mindset in developing a normal web application—agile. You need to be flexible in order to change the software as the requirements change.
However, writing a smart contract requires a different mindset. The application of smart contracts can range from writing a financial application to launching a rocket into space. Fixing an error once a smart contract is deployed is very difficult...
