README.md

Ethereum FlightSurety Dapp

Ethereum FlightSurety Dapp is a flight delay insurance for passengers.

• Managed as a collaboration between multiple airlines
• The passengers purchase insurance prior to flight
• If flight is delayed due to airline fault, passengers are paid 1.5X the amount they paid for the insurance
• Oracles provide flight status information
• The smart contract is upgradable
• The smart contract securely requests and receives information from oracles
• Airlines registration implements multi-party consensus

This is the 4th project from the Udacity - Blockchain Developer Nanodegree Program

Structure

The repository contains:

• contracts: Back-end ethereum smart contracts (deployable from Truffle)
• test: Back-end mocha unit testing (executable from Truffle)
• src/server: Back-end NodeJs oracle server App (executable from Webpack)
• src/dapp: Front-end javascript/web3.js dApp (executable from Webpack)

Install

Compatible with:

• Truffle v5.3.7 (core: 5.3.7)
• Solidity v0.8.5 (solc-js)
• Node v16.2.0
• Web3.js v1.3.6
• Ganache CLI v6.12.2 (ganache-core: 2.13.2)

Run:

npm install

truffle compile

Develop Back-End

To deploy the smart contracts locally with 50 account with default 5000 ether per account:

ganache-cli -m "candy maple cake sugar pudding cream honey rich smooth crumble sweet treat" -a 50 -e 5000

truffle migrate

To test it:

npm run test or truffle test ./test/FlightSurety.test.js

To run the oracles:

npm run server

Develop Front-End

To use the dApp:

truffle migrate

npm run dapp

To view the dApp:

http://localhost:8000

User Interface

Successful flight credit insurance withdraw

The accepted result from the oracles is STATUS_CODE_LATE_AIRLINE (20)

Resources

• How does Ethereum work anyway?
• BIP39 Mnemonic Generator
• Truffle Framework
• Ganache Local Blockchain
• Remix Solidity IDE
• Solidity Language Reference
• Ethereum Blockchain Explorer
• Web3Js Reference