BVG, get me a ride!
Smart contract to simulate buying and querying a transport ticket from BVG.
About
The problem it solves - A ticket cannot be faked - The ticket is fully available 24/7 on the ethereum blockchain
How it's made
Challenges we ran into I'm new to solidity and this is the first contract that I've ever written. Writable functions re-entrancy, needed to create a modifier to be used as a locked or mutex. Computing the expiry date took me a while to figure it out Deployment of the contract to testnet, I contacted the mentor and receives useful insights and managed to successfully deploy to görli testnet.