Lottery Smart Contract

Getting Started

1. Open project in terminal:

   cd project/path

2. Use specified node version:

   nvm use

   • The .nvmrc file contains the used node version.
   • You can check the node's version in package.json file, "engines": { "node": "^14.20.0" }.

3. Intall packages:

   npm install

4. Configure your environment variables

   1. Create env file: touch .env

   2. Add your mnemonic phrase (12 words).

   3. Add your provider URL.

      • [Recommended] use 3rd party service like Infura -- after you create new account or login, go to endpoints tab, choose the network and protocol you want to connect, copy your personal URL, and add it to the env.
      • [Another way] setup a local node in your machine to connect the network (this way is panic).

   You have to get something like that:

   MNEMONIC="cost spirit party essay insane festival front woman today desk pioneer wolf"
   PROVIDER_URL="https://goerli.infura.io/v3/a5aac9c4375547a8a7a34dc4dc41c279"
   

5. Test that everything is going well:

   npm run test

   

Deployment

1. Deploy the contract on connected network (open VPN to avoid country blocked error)

   npm run deploy

   

2. Copy deployed contract address, and go to Remix Web IDE

3. Open DEPLOY & RUN TRANSACTIONS tab

4. Past it in the second sectin at OR section

   

5. Copy contract source code Lottery.sol, and past it in new contract file in File Explorer tab.

   

6. Back to DEPLOY & RUN TRANSACTIONS tab, and click on At Address button to compile the contract and get its ABI.

7. Go to Deployed Contracts section, and test the App!

8. Don't forget to add Wei value on each payable transaction.

Miscellaneous

Formatting & Linting code

npm run lint

• It will format the code by Prettier, and lint the code by Solhint.

• Solhint linter's configuration placed in package.json > "solhint"

• Prettier formatter's configuration placed in package.json > "prettier"