KroudCoin - A Kickstarter Clone using Ethereum

KroudCoin allows crowdsourcing funds for use in their projects. There are 2 different roles in this implementation

Owner - Creator of a project/campaign
Contributer/Approver - One who contributed to a campaign and has an approving authority

When an owner needs funds to spend, he creates a request for the release of funds. Contributors can then approve requests and requests that are approved by more than half of contributors can then be finalized by the owner to release the funds.

Pre-requisites

Ensure you have Truffle(v4) , Ganache , nodejs(V10+) and NPM installed on the machine. I have tested this with Truffle version 4.1.14 and Google Chrome with Metamask extension installed in it.

If you have truffle 5.0, please use truffle v 4.1.14

npm uninstall truffle
npm install -g [email protected]

I used solidity v0.4.24. Please ensure your solc is v0.4.24

Installation

$ git clone https://github.com/psiva/Campaign.git
$ cd Campaign
$ npm install
$ cd client
$ npm install
$ cd .. 
$ ganache-cli
$ truffle migrate --reset
$ cd client
$ npm run dev

1. Open up Ganache (desktop/command line) and configure it to hostname = 127.0.0.1 and port 8545 (default unless changed) to get your local blockchain up and running.
2. Execute cd .. and thentruffle test and other truffle commands from within the Campaign directory
3. Update the MNEMONIC in the .env file with the mnemonic from the metamask. This is required if you wish to deploy the contract to Rinkeby testnet.
4. Ensure you select Rinkeby testnet in the Metamask
5. Navigate to http://localhost:3000 in the browser to interact with the web app.
6. Use Rinkeby accounts to interact with the app

If you would like to use Ganache, update the contract address in /Campaign/client/lib/getContract.js with the contract address in the ganache and use ganache in the metamask.

Use truffle test from the Campaign folder to execute the tests

Using network 'development'.

  Contract: Campaign
    ✓ deploys a factory and a campaign
    ✓ marks caller as campaign owner (85ms)
    ✓ allows people to contribute money and marks them as approvers (108ms)
    ✓ requires a minimum contribution (65ms)
    ✓ allows a owner to create a payment request (148ms)
    ✓ process requests for payment (598ms)
    ✓ returns campaign summary (170ms)


  7 passing (2s)

The address in the metamask that is used for creating a campaign is the owner for that campaign. While running the tests accounts[0] is the owner.

Code Structure

contracts folder contains all the logic
client folder contains the front end code
design_pattern_decisions.md and avoiding_common_attacks.md are in the root folder.

To access the Contract on MyEtherWaller navigate to https://www.myetherwallet.com/#contracts

Contract Address : 0x282845238991eb6515265A4Ec71b1dB40bBFd589

ABI :

[{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"campaigns","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"minimumContribution","type":"uint256"},{"name":"imgHash","type":"string"}],"name":"createCampaign","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"getDeployedCampaigns","outputs":[{"name":"","type":"address[]"}],"payable":false,"stateMutability":"view","type":"function"}]