Flight-Surety-Dapp

Flight-Surety Dapp is the 7-th Project for Udacity Nanadegree - Blockchain developer. It is a blockchain smart contract that allows for purchasing insurance on airline flights. Including a browser UI allowing for simple contact interaction.

Install

There are smart contracts written in Solidity and could be tested with Truffle. The dapp works as server interacting with deployed smart contracts and supporting browser UI.

Before installation of node packages, please check that Truffle is installed in your machine.

To install the Dapp, input install command in root of Dapp:

npm install

Compile & Test the smart contracts

To compile all smart contracts to JSON

truffle compile

To test all smart contracts

truffle test

Deploy Contracts to local testing net

truffle develop
// inside truffle console
migrate --reset


2_deploy_contracts.js
=====================

   Replacing 'FlightSuretyData'
   ----------------------------
   > transaction hash:    0xe0f1c2395c74272081fd8ae8272bdd2251ce28d782c36ba76a064bd0af71dedb
   > Blocks: 0            Seconds: 0
   > contract address:    0x6221D95e8c12655419e1872CDA133B729A0c22B4
   > block number:        3
   > block timestamp:     1571077352
   > account:             0xe45cf0CD14dd5D5B4CF807813544Eee2987212F1
   > balance:             99.86877448
   > gas used:            6257860
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.1251572 ETH


   Replacing 'BuyerData'
   ---------------------
   > transaction hash:    0x7a2d257f6e54a5fa27bc2b7e1811401351323df2d47fbf0fc56a56d995a338f4
   > Blocks: 0            Seconds: 0
   > contract address:    0xF6BAD220a6C2964DA6166a954A1A38EFE35559D3
   > block number:        4
   > block timestamp:     1571077353
   > account:             0xe45cf0CD14dd5D5B4CF807813544Eee2987212F1
   > balance:             99.84549592
   > gas used:            1163928
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.02327856 ETH


   Replacing 'FlightSuretyApp'
   ---------------------------
   > transaction hash:    0xc0ec31642d8330b5d24f68c300784d6380d39acdda82181c66a5ca241d3823ad
   > Blocks: 0            Seconds: 0
   > contract address:    0x34792a7645172D37C895f41B5dF4c0D828FaFe16
   > block number:        5
   > block timestamp:     1571077354
   > account:             0xe45cf0CD14dd5D5B4CF807813544Eee2987212F1
   > balance:             99.76248408
   > gas used:            4150592
   > gas price:           20 gwei
   > value sent:          0 ETH
   > total cost:          0.08301184 ETH


   > Saving migration to chain.
   > Saving artifacts
   -------------------------------------
   > Total cost:           0.2314476 ETH

Then copy the contract addresses (FlightSuretyData & FlightSuretyApp & BuyerData) to /src/config.json. The json should be:

{
    "url": "http://localhost:8545",
    "ws":"ws://localhost:8545",
    "dataAddress": "<FlightSuretyData contract address>",
    "buyerDataAddress":"<BuyerData contract address>",
    "appAddress": "<FlightSuretyApp contract address>",
    "contractOwner":"0xe45cf0cd14dd5d5b4cf807813544eee2987212f1"
}

Startup the Dapp

Step-1: Start Oracle simulating server

All the code of oracle simulating server would be in /src/server/server.js. The Oracle simulating would automatically:

Register 4 airlines (and all these 4 airlines would fund 15 ethers)
Add 6 flights
Buy insurance on flight AX0101 for 1 passenager (the default passenager in UI)
Register 30 oracles who will submit oracle responses for flight status

To start the oracle simulating server, turn on new terminal and go to directory src/server. Then,

node server.js

Command line would show up the status of setting up simulating data. If all succeed, you would find below on command line:

Listening to ws://localhost:8545 for OracleRequest event

Step-2: start web service server

To set up web servers supporting UI, turn on terminal and use below command in the root of project,

node server.js

Step-3: Browing the UI for buying insurance

In new browser, input http://localhost:8000 .

Some features of UI

The feature of JQuery interacting wiht websocket is not completed. Press [F5] button after you press buy and fetched button on UI.

andrewchan168 / flight-surety-dapp Goto Github PK