Lisk Bike

Demo

You can try the mobile app on your device by following this link : https://expo.io/@jesusthehun/lisk-bike. Download the Expo Client app and scan the QR code.

BEFORE YOU USE THE DEMO be aware that it will reveal your real location and store it into the demo blockchain. If you are in a private location, you might want to use a local blockchain instead.

Bike Location Behavior

The bike location is updated when you move with your phone. Since bike are not visible on the map if they are already rented, you won't see the bike's position updated until you return the bike.

Development

Blockchain using Docker

For the first run we have to create the database before we start the node app.

cd blockchain
docker-compose build
docker-compose up -d psql
docker exec -ti lisk-psql psql -h localhost -U lisk -d postgres -c "CREATE DATABASE lisk_dev OWNER lisk"
docker-compose up -d nodejs

Next times you can use docker-compose start and docker-compose stop

Create some data

We will create two accounts, one for the company, one for rent. The accounts will be store in json file in the script directory.

cd tests && node create-accounts.test.js 

We will now create bikes using the company account. The default bike location is in Paris, you can of course edit the script to change their default location.

node create-bikes.test.js ARG

Mobile app

The app has been created with Expo. The blockchain needs to be running.

cd client && npm i
npm start

Scan the QR code with the Expo Client app and you are good to go !

Technical details

Rent & Return

To ensure consistency and reversability, both rent & return transaction must specify the previous transaction of each. For example, to rent a bike you must specify the lastRentTransactionId and to return the bike you must specify the lastReturnTransactionId.

Read scripts for more details, they are pretty straight forward.