Water-level Smart Contract Insurance

Requirements

• NPM

Installation

npm install
cd client
npm install

Or

yarn install
cd client
yarn install

Test smart contract

npm test

Run frontend

cd client
npm start

Deploy smart contract

If needed, edit the truffle-config.js config file to set the desired network to a different port. It assumes any network is running the RPC port on 8545.

npm run migrate:dev

For deploying to live networks, Truffle will use truffle-hdwallet-provider for your mnemonic and an RPC URL. Set your environment variables $RPC_URL and $MNEMONIC before running:

npm run migrate:live

Note. The project has dotenv as dependency, therefore environment variables can be defined in an .env file at the root of the project.

Helper Scripts

There are 3 helper scripts provided with this box in the scripts directory:

• 1_set_oracle_data.js: Sets the Oracle Data to fetch water level. For Kovan a pre-coordinator smart contract is used.
• 2_set_evaluation_period.js: Sets the frequency of water level evaluation in seconds. By the default it's one day.
• 3_fund_contract_eth.js: Funds the contract with ETH.
• 4_fund_contract_link.js: Funds the contract with LINK.
• 5_create_insurance_policy.js: Creates an insurance policy with pre-defined data.
• 6_start_evaluation_period.js: Triggers Chainlink Alarm to evaluate water levels depending on the set frequency.
• change_water_level_manually.js: Manually changes the water level of a given policy. This is used for demo purposes.
• get_insurance_policies.js: Returns the policies and policy ids of the current user.
• request_water_level_manually.js: Performs the request of water levels.

They can be used by calling them from npx truffle exec, for example:

npx truffle exec scripts/4_fund_contract_link.js --network live

The CLI will output something similar to the following:

Using network 'live'.

Funding contract: 0x972DB80842Fdaf6015d80954949dBE0A1700705E
0xd81fcf7bfaf8660149041c823e843f0b2409137a1809a0319d26db9ceaeef650
Truffle v5.0.25 (core: 5.0.25)
Node v10.16.3