The Crowdfunding DApp is a decentralized application built using Solidity on the Ethereum blockchain.
It enables users to create or contribute to crowdfunding campaigns securely without depending on third parties or centralized platforms.
Smart contracts ensure transparency, fairness, and automation — contributors can donate ETH to a project, and if the goal isn’t met within the deadline, they automatically get a refund.
To establish a trustworthy and transparent crowdfunding ecosystem that allows creators, innovators, and organizations to connect directly with their supporters through blockchain technology.
The vision is to remove intermediaries, enhance transparency, and guarantee fair handling of funds using decentralized systems.
- 💸 Decentralized Fundraising: Direct contributions using Ethereum with no intermediaries.
- ⏰ Deadline-Based Funding: Campaigns automatically close after a specified duration.
- 🔒 Secure Withdrawals: Only the campaign owner can withdraw funds — and only if the goal is achieved.
- 💰 Refund Option: Contributors can claim a refund automatically if the campaign fails.
- 📊 Transparent Transactions: All contributions and withdrawals are visible on the blockchain.
- 🌍 Multi-Campaign Support: Enable multiple campaigns to run simultaneously within the same contract.
- 🧾 Milestone-Based Funding: Funds released in stages as project goals are met.
- 💬 Campaign Updates: Allow creators to post updates and progress reports for contributors.
- 📱 Frontend Integration: Create a React + Web3.js interface for easy interaction.
- 🔐 Advanced Security: Add audits, KYC verification, and protection against re-entrancy attacks.
owner→ Address of the campaign creator.goalAmount→ The total ETH target to be raised.totalFunds→ Total ETH contributed by all backers.deadline→ The timestamp marking campaign end.goalReached→ Boolean to track whether the funding goal has been achieved.fundsWithdrawn→ Prevents multiple withdrawals by the owner.contributions→ Mapping to track each contributor’s total donation.
| Function | Description |
|---|---|
constructor(uint256 _goalAmount, uint256 _durationInDays) |
Initializes the campaign goal and duration (in days). |
contribute() |
Allows users to contribute Ether to the campaign before the deadline. |
withdrawFunds() |
Lets the owner withdraw all funds once the goal is met and before refund eligibility. |
getRefund() |
Enable contributors to get their money back if the goal is not reached by the deadline. |
getCampaignStatus() |
Returns the current status of the campaign as a readable message. |
| 7⁷ |
- Solidity (v0.8.x) – Smart contract development language.
- Ethereum Blockchain – For decentralized and transparent transactions.
- Remix IDE / Hardhat / Truffle – To compile, deploy, and test smart contracts.
- Open Remix IDE
- Create a new file named
Crowdfunding.soland paste the contract code. - Compile using Solidity version 0.8.0 or above.
- In the Deploy & Run tab, enter values:
_goalAmount: e.g.,5 ether_durationInDays: e.g.,7
- Click Deploy.
- Test the contract using the following functions:
- contribute() → Send some ETH from multiple accounts.
- getCampaignStatus() → Check campaign progress.
- withdrawFunds() → Owner withdraws funds if goal met.
- getRefund() → Contributors claim refunds if goal not met before deadline.
This project is licensed under the MIT License.
You are free to modify and use it for personal learning, experimentation, or academic purposes.
Bhoomi Rathore
btech Student | Aspiring Developer | Exploring Blockchain & Space Tech 🚀
contract details:0x6825a0f0cFAF6FF3825621b59c2D0a752ad00966
