CrypTag

Crowdsourcing data labelling tasks on the ethereum blockchain.

Final project for Chainshot OxBridge Bootcamp, Dec 2021 - Jan 2022.

Usage

• Set up a .env file with an alchemy endpoint RINKEBY_URL and a private key for the server PRIVATE_KEY (change the public address in the contracts if necessary).
• Change into the solidity folder, npm install, then compile the contracts using npx hardhat compile.
• Change into the back-end folder, npm install, then start the server using nodemon server.js
• Change into the front-end folder, npm install, then start the front-end using npm start

Front End

Built with React/Chakra UI.

• Task Creation
• Task Viewing
• Label a task and submit labels
• View Results

Back End

Server stores data labels given by each address. Uses this to compute consensus label.

On settlement, uses label accuracy metrics to payout fairly.

Smart Contracts

• Settlement.sol
  • Disperses funds to the labellers
  • This can be changed later on if we adjust the consensus mechanism.
• Task.sol
  • Creates and stakes a task.