FlightSurety

FlightSurety is an Ethereum DApp to manage flight insurances.

User Stories

Airlines

Airlines form a consortium:

• Providing a funding of at least minFund is required to join
• Starting from 4 airlines registered, consensus of 50% is required (votes of half of the registered airlines) for new airline registration
• Consensus is not required to register flights

They can

• Register other airlines.
• Can register flights
• Withdraw the amount credited to them following flight ticket purchases by passengers.

Passengers

Passengers can:

• Book flights that have been registered by airlines.
• Subscribe insurance
  • This allows them to get reimbursed 1.5 x their insurance amount if a flight is delayed due to the airline's responsibility.
  • This credited amount is not transferred automatically but has to be withdrawn.

Oracles

The oracles inform the smart contract about the status of a flight.
Flight status is requested by submitting a corresponding request to the oracles.
As soon as 3 oracles provide concurring opinion, the flight status is updated accordingly.
Oracles are simulated: they generate a random status code on the server side.

Architecture

Data (flights, passengers, insurance amounts, airlines...) has been separated from application logic, resulting in two separated contracts: FlightSuretyApp and FlightSuretyData.
This offers the following benefits:

• a new 'App' contract can be deployed in the case of business rule changes (different oracle registration fee, funding fee, etc..) while the state of the data contract is kept.
• ensures modularity

System OVerview

Flight Status Processing Workflow

Getting Started

1. Clone/download repository

2. Install dependencies: yarn

3. Start local blockchain: yarn anvil

4. Deploy contracts: yarn deploy

5. Start server: yarn start:server (available on http://localhost:3001)
   API

   path	method	request	response
   /flights	GET		List of registered flights
   /flight/:key	GET		flight
   /response/:key	GET		status code
   /flight-key	POST	{ flightRef: string, from: string, to: string, takeOff: number }	flight key hash

6. Start UI: yarn start:ui ((available on http://localhost:3000))

Resources

• Foundry: Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.
• CRUD pattern in solidity