Secret Ballot dApp
This dApp demonstrates confidentiality using a voting smart contract that keeps each user's vote private and hides vote tallies until voting has ended. It serves as an example app for our Web3(c) library.
To interact with this dApp locally follow the steps below.
To modify the contract, run
npm install -g truffle
Building & Deploying the Smart Contract
To build a new ballot, run:
You can deploy the contract with truffle. to do so:
truffle.jsto add the mnemonic for your private key. This will be the address that deploys the smart contract; you must control this address if you want to end voting from the dApp!
truffle migrate --reset --network oasis
Note the address of the deployed contract in the output
... Saving artifacts... Running migration: 2_deploy_contracts.js Replacing SecretBallot... ... 0x473e196528a48d27d5488dddf9bb8a351caa6bfe41a44b8e9fca0c935142db90 SecretBallot: 0x1dd2838d8290dd83d5d060d1b3d2cc1eae0ac5f7
In this example the ballot was deployed to address
Interacting with the dApp
Launch the local web server:
npm run dev
In your browser visit
Notes and Troubleshooting
- The smart contract code is available at
- If you don't see anything in the web browser, ensure your Metamask is unlocked and configured for the Oasis testnet
- Due to rate limiting the web UI doesn't always display complete information. If the page doesn't fully populate you may need to wait a few seconds and refresh the page
- To change the ballot options, edit
migrations/2_deploy_contracts.jsthen re-deploy using the instructions above