Decentralize: Ecommerce Store

Overview: This is a simple ecommerce DApp store where everyone can sell/buy products. Truffle framework is being used to build the entire app end-to-end.

By utilizing IPFS to host the site(image files first, site fully with other assests would be shift to IPFS later in the future) to make it truly decentralized.

• The contract will also feature an escrow system, which involves a 3-person approval to release funds. This means that instead of the buyer sending money to the sender directly, a third person holds the funds until the others have agreed funds should be released (or refunded). To be added

User Stories

The following user stories must be completed:

• Users can see products for sale, and buy them through a web interface.
• Users can add products for sale using a web interface.
• Product images are being hosted on IPFS.
• The WebUI is updated as the user makes transactions, by listening to Solidity Events.
• Frontend/site assets are being hosted on IPFS.
• A functioning escrow system:
  • Instead of transferring money directly to the buyer, money is sent to an "escrow" holder.
  • This person will release funds or refund funds based on consensus from 2 out of the 3 parties.
  • The escrow contract will deduct a 1% fee for these services.
• User is able to filter products based on category and sold/unsold status. To do this, an off-blockchain store would be implemented so as to aid the search of listed product but actual transactions won't be done on the off-blockchain store, just the items list would be there.

Tips

• Define a struct for Product information.ProductStatus to represent whether it's available, buying, or sold may be enum.

struct Product {
  string name;
  string category;
  string imageLink;
  string descLink;
  uint price;
  ProductStatus status;
}

• Updating the page in real time as different transactions occur will use Events in Solidity. Solidity Events.

Advanced

The following advanced user stories are optional, and more knowledge are gain from doing them:

• Writing unit tests for the contract functionality. Examples are verifying that money is debited correctly, product availability is updated correctly, products are added correctly.
• Allow quantity for products in the store.
• Whatever else that could be think of!

Development

Prerequisites

• truffle
• ipfs

Building and Deploying the contract

$ truffle compile
$ truffle migrate

Start IPFS deamon

$ ipfs daemon

If you have problem with CORS access, run below command and restart your deamon:

ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["*"]'
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Methods '["PUT", "GET", "POST"]'
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Credentials '["true"]'

Start the Web App

$ npm install
$ npm run dev

Live deploy link of MVP

Decentralize Ecommerce