Flightdelay UI Web Application

Webapp

Configuration

The webapp is configured via environment variables. The following variables are available:

• NEXT_PUBLIC_DEPARTURE_DATE_MIN_DAYS: The minimum number of days in the future for the departure date

• NEXT_PUBLIC_DEPARTURE_DATE_MAX_DAYS: The maximum number of days in the future for the departure date

• NEXT_PUBLIC_AIRPORTS_WHITELIST: A comma-separated list of airport codes of whitelisted airports. At least the departure or the arrival airport must be in this list.

• NEXT_PUBLIC_AIRPORTS_BLACKLIST: A comma-separated list of airport codes of blacklisted airports. If the departure or the arrival airport is in this list, no policy can be created.

• PREMIUM: Set the premium in wei. Defaults to 15000000.

• NEXT_PUBLIC_APP_BASE_URL: The base URL where the webapp is deployed (without trailing slash). Defaults to https://flightdelay.app

• NEXT_PUBLIC_PRODUCT_CONTRACT_ADDRESS: The address of the product contract

• NEXT_PUBLIC_PRODUCT_TOKENHANDLER_CONTRACT_ADDRESS: The address of the product token handler contract

• NEXT_PUBLIC_POOL_CONTRACT_ADDRESS: The address of the flight pool contract

• NEXT_PUBLIC_ORACLE_CONTRACT_ADDRESS: The address of the flight oracle contract

• NEXT_PUBLIC_FLIGHT_NFT_CONTRACT_ADDRESS: The address of the flight NFT contract

• NEXT_PUBLIC_ERC20_TOKEN_CONTRACT_ADDRESS: The address of the ERC20 token contract to pay the premium with

• NEXT_PUBLIC_ERC20_TOKEN_VERSION: Token version, default is "1", needs to be set to "2" for USDC on Base

• NEXT_PUBLIC_PREMIUM_TOKEN_SYMBOL: The symbol of the premium token

• NEXT_PUBLIC_PREMIUM_TOKEN_DECIMALS: The number of decimals of the premium token

• NEXT_PUBLIC_CONTRACTS_BADGE_TEXT: The badge text to show on the contracts page (optional). Used to indicate the environment (e.g. "test", ...)

• STATISTICS_PROVIDER_MNEMONIC: The mnemonic of the statistics provider. This account is used to create the policies.

• STATISTICS_PROVIDER_MIN_BALANCE: The minimum balance of the statistics provider. If the balance is below this value, the provider will not be able to create new policies and the readiness check will fail.

• STATUS_PROVIDER_MIN_BALANCE: The minimum balance of the status provider. If the balance is below this value, the provider will not be able to send oracle responses and the readiness check will fail.

• STATUS_PROVIDER_MNEMONIC: The mnemonic of the status provider. This account is used to send the oracle response transactions.

• RISKPOOL_MIN_CAPACITY: The minimum capacity of the risk pool in wei. If the capacity is below this value, the policy creation will not be possible.

• ORACLE_ARRIVAL_CHECK_DELAY_SECONDS: The delay in seconds for the oracle to check the arrival status after the exected arrival time

• GAS_LIMIT: The gas limit for oracle responses (defaults to 5000000)

• RISKPOOL_MAX_PAYOUT_CHECK_LOOKAHEAD_SECONDS: The lookahead time in seconds for the risk pool maximum payout check (executed during readyness checks). Defaults to 172800 seconds (2 days).

• NEXT_PUBLIC_EXPECTED_CHAIN_ID: The expected chain ID

• NEXT_PUBLIC_EXPECTED_CHAIN_NAME: The expected chain name (optional, required for automatic chain adding)

• NEXT_PUBLIC_EXPECTED_CHAIN_RPC_NODE_URL: The expected chain RPC node URL (optional, required for automatic chain adding)

• NEXT_PUBLIC_EXPECTED_CHAIN_BLOCK_EXPLORER_URL: The expected chain block explorer URL (optional, required for automatic chain adding)

• NEXT_PUBLIC_EXPECTED_CHAIN_TOKEN_NAME: The expected chain native token name (optional, required for automatic chain adding)

• NEXT_PUBLIC_EXPECTED_CHAIN_TOKEN_SYMBOL: The expected chain native token symbol (optional, required for automatic chain adding)

• NEXT_PUBLIC_EXPECTED_CHAIN_TOKEN_DECIMALS: The expected chain native token decimals (optional, required for automatic chain adding)

• FLIGHTSTATS_BASE_URL: The base URL for the Flightstats API

• FLIGHTSTATS_APP_ID: The Flightstats API application ID

• FLIGHTSTATS_APP_KEY: The Flightstats API application key

• LOG_API_PROXY: set the true to log proxy requests on the backend

• LOG_LEVEL: The log level for the backend api (debug, info, warn, error)

• NEXT_PUBLIC_GA_MEASUREMENT_ID: The Google Analytics measurement ID. No tracking is done if this value is not set

• NEXT_PUBLIC_GA_ENVIRONMENT_ID: The Google Analytics environment identifier

• CSP_ENABLED: Set to true to enable the Content Security Policy

Contract generation

The webapp uses Typechain to generate smart contract bindings. The generated files are stored in the src/contracts directory (which is not commited to git, to ensure the latest artifacts are used). The generation is done automatically after running npm install.

Currently not all smart contracts are compiled automatically, due to the huge number of classes this would generate. Which contracts are compiled is defined in the package.json file in tasks typechainOpenzeppelinTypes, typechainGif and typechainFlight.

Start

npm run dev

Important: This project requires a fontawesome pro license. Please set your auth token in the FONTAWESOME_NPM_AUTH_TOKEN environment variable.

Trigger oracle via curl

curl -X POST http://localhost:3000/api/oracle -H "Content-Type: application/json" -d {} -w " %{http_code}\n"

Test

npm run test
(or)
npm run testLoop

Containzerized runtime

Via container created by executing

docker build -t flightdelay-ui-webapp .

Important: This project requires a fontawesome pro license. Please set your auth token in the FONTAWESOME_NPM_AUTH_TOKEN environment variable.

Branching Strategy

This repository uses Gitflow as branching strategy. The main branches are:

• main: The main branch for production releases
• develop: The main branch for development

Feature branches are created from develop and merged back into develop via pull requests (or git merge). Hotfix branches are created from main and merged back into develop and main via pull requests (or git merge).

Git commands

Create a new release from develop

Assumption: the current branch is develop and the branch is up-to-date and contains the latest changes.

git switch main
git pull
git merge develop

Now the main branch contains the latest changes from develop and the production system can be updated from the main branch.

Create a hotfix branch for production

Assumption: a hotfix is required for the production system.

git switch main
git pull
git switch -c hotfix/<branch name># implement the hotfix on that branch 

Merge a hotfix into main and develop

Assumption: the hotfix branch is up-to-date and contains the latest changes.

git switch main
git pull
git merge hotfix/<branch name>
git switch develop
git pull
git merge hotfix/<branch name>

Now the hotfix is merged into main and develop and the hotfix branch can be deleted. Production can be updated from the main branch and the development can continue on the develop branch.