Disaster Risk Insurance

Disaster Risk Insurance is micro insurance in case of happening disaster by using smart contract.
Any users who fund premiums and match condition can receive insurance money instantly by smart contract.
This is the Disaster Risk Insurance project to build a dapp that calls a Honeycomb marketplace API through a Chainlink node over the Ropsten testnet.

UI and process of Disaster Risk Insurance

Once you follow the previous steps, your browser should display the page below at http://localhost:3000/. If the page is blank, try logging in to your MetaMask add-on.

[Basic process]:
- This is the Disaster Risk Insurance project of an oracle-connected dapp.
- The oracle returns a city name which is matched IP-address of being requested from current user.
- The users can fund premiums between 0.1ETH ~ 0.5ETH. In case it happen disaster in your city, you can receive 2 times insurance money which you funded premiums until previous time of happening disaster.
- If result of request that user's city name which called by registerd IP address match with city name of disaster area, user can receive withdrawed insurance money from fund pool of premiums automatically by smart contract.

[Some premise]:
- User need to register with their wallet-address and IP-address as benefically
- Disaster area also need to register with city name and isDisaster (Define both of properties in struct of DisasterArea )
  - This time I prepare seed data of 3 disaster area. If it push bottom of button which is called "Create Disaster Area", it can save seed data of 3 disaster area. (Next time, I will find disaster area API and implement them as oracle and implement matching logic)

Replace the ipStack with a Honeycomb API

See how the JobID of ipStack API is set in migrations/4_deploy_disaster_risk_insurance.js:

const jobId_1 = web3.utils.toHex("d1d029a5f50c44789f19da3ec4e51e7b"); // This jobId's data-type is bytes32 const jobId_2 = web3.utils.toHex("c62efeba282f48dcb5a1d5b7b7cade9d"); // This jobId's data-type is int256 const jobId_3 = web3.utils.toHex("11a18a9089bd4c668f13f5e5df5547b8"); // This jobId's data-type is uint256

The honeycomb.market Ropsten node serves a random int256 between two limits with this JobID. To develop a smart contract that depends on another type of call, you are going to need to change it.

First, see this article that gives a general overview of Honeycomb Marketplace. Then, follow these steps:

Go to Honeycomb Marketplace, log in
Click on the Browse APIs tab
Click on an API
Click on the Connect button of one of the paths
Select Ropsten Test Network as the network
Select the data type you want

As a result, you are going to see the Ropsten listing for that endpoint. Replace the JobID in migrations/4_deploy_disaster_risk_insurance.js with the new JobID.

Note that you are also going to have to modify the smart contract based on the API you have used. See this article for an example.

Before installation

Sign up to the Honeycomb marketplace to access the job listings
Install npm
Install truffle globally using:

npm install -g truffle

Install the Metamask add-on to your browser and create a wallet. Note down the mnemonics. Fund it with Ropsten ETH and Ropsten LINK.
Create an Infura account, get an endpoint URL for the Ropsten testnet and note it down.
(Optional) Install Visual Studio Code

Installation

Clone this repo using:

git clone https://github.com/clc-group/honeycomb-example-project.git

Go to the main directory (/honeycomb-example-project)
Install the dependencies for the smart contract:

npm install

Create the file that you are going to enter your Infura credentials:

cp wallet.json.example wallet.json

Open the newly created wallet.json file and enter the mnemonics and the endpoint URL you have noted down earlier, similar to wallet.json.example.
Deploy the contract (Ropsten LINK will be transferred from your wallet to the contract automatically during deployment)

npm run deploy-ropsten

Go to the front-end project directory (/honeycomb-example-project/client)
Install the dependencies for the front-end project:

npm install

Start the server

npm run start

References

honeycomb-wiki https://github.com/clc-group/honeycomb-wiki/wiki
Videos of workshop（Honeycomb） https://www.youtube.com/channel/UCCk_ofRpFHDYxtnepCUmfKA
Usage of honeycomb marketplace https://medium.com/clc-group/honeycomb-marketplace-101-for-ethereum-developers-c7c63c2d3049

masaun / disaster-risk-insurance Goto Github PK