Token exchange 🤑

decentralized ERC-20 token (Brownie token ) exchange .

Tech stack & packages used 👨‍💻

• React.js ,solidity ,hardhat ,mocha, chai, ether.js, web3.js,lodash, apexcharts & waffle

Token exchange features 🎉

• Deposite & withdraw ether.
• Deposite & withdraw token.
• Buy & sell token.
• Maintain trade (Create order,fill order & cancel order).
• Realtime updates.

How to run 🏃 :

---

• Run hardhat node

  npx hardhat node
  

• Run test cases

  npx hardhat test
  

• Deploy contract in local hardhat node

  npx hardhat run scripts/deploy.js --network localhost
  

• Connect hardhat with metamask
• Run react frontend

  cd client
  npm start
  

Web3.js

---

• Load web3

• Connect with contract

  new web3.eth.Contract(jsonInterface[, address][, options])
  

• Callback promises events

  .on('transactionHash', function(hash){ ... })
  .on('error', function(error){ ... })
  

• Subscribe to event

  contractName.events.EventName([options][, callback])
  

• Fetch all data from contract event

  • An array with the past event Objects, matching the given event name and filter.

  contractName.getPastEvents(EventName[, options][, callback])
  

Hardhat commands

npx hardhat accounts
npx hardhat compile
npx hardhat clean
npx hardhat test
npx hardhat node
node scripts/deploy.js
npx hardhat run scripts/seed.js
npx hardhat help
npx hardhat run scripts/deploy.js --network <network name>