spandan114/Crowdfunding-DAPP

Decentralized crowd funding platform where user can start fundraising , anyone can contribute & Fund riser need permission of contributor before withdrawing amount from contract .

Crowd funding

demo.mp4

Project features 💡

• User can start a fundraising.
• Anyone can contribute.
• End project if targeted contribution amount reached.
• Expire project if targeted amount not fulfills between deadline.
• Contributors can withdraw contributed amount if project expire.
• Owner need to request contributors for withdraw amount.
• Owner can withdraw amount if 50% contributors agree.
• Connect with waller.

Tech stack & packages used 📦

package	explain
Next.js	For building frontend
solidity	For writting smart contracts
tailwind css	For building design
ether.js	Web3 client (contract testing ).
web3.js	Web3 client (Frontend Next.js).
Chai	javascript testing framework.
react-toastify	For Notification.
hardhat	Ethereum development environment.
Redux	For managing and centralizing application state.

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How to run 🏃 :

• Run hardhat node

  npx hardhat node
  

• Run test cases

  npx hardhat test
  

• Connect HardHat Account to Metamask

Hardhat.Account.Creation.mp4

• Deploy contract in local hardhat node

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

• Run Next.js frontend

  cd client
  npm run dev
  

• Connect account to website

Web3.js

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• 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 help
npx hardhat run scripts/deploy.js --network <network name>