program017 / komharproject

komharPROJECT

The four sprints are intended to create a complete solution that provides notarization and document storage service supported by ethereum blockchain and IPFS content storage. High level Physical Architecture: The IPFS node and ethereum testnet will reside on infura http://infura.io . The Web Application will reside AWS EC2 cloud instance.

Functional Requirements:
User Registration: Parameters - Username, Wallet Password (With each registration, the user’s wallet is created and the key file should be stored on the server file system). On User registration a new ethereum account should be created and its address should be stored with the user name in the smart contract created for the same.
User Login: The user should supply the username and wallet password - the flow should verify that the user key is decrypted using the password supplied by the user. The user’s wallet address will need to be retrieved from the Smart Contract that holds the username and user wallet address. The application code will have to loop through all the usernames and match the requested username to reach the correct user wallet address. Once the wallet address is retrieved from the contract, the correct key should be selected from the file system and should be decrypted with the password from the user. If it succeeds user should reach his profile page.
User Profile: User profile should allow him to upload document files and sow his existing uploaded file hashes. A new file uploaded should be added to IPFS and the file hash should be added into the smart contract in a mapping against his username. Existing files hashes should be maintained as a mapping in the contract. The profile page should list the file hashes as links, when the user clicks on the link, the file content stored by the user should display (if it’s an image) or download if it cannot be displayed.
Ether funding: The file add smart contract function call should use gas from the user wallet. The server already has the user private key so the transaction needs to execute using that private key of the user. The user add smart contract function call should use and admin wallet which will be already created by the interns before any user registers. The wallet’s private key should also be on the server file system. After the registration, user’s wallet will need to be funded offline so the user is able to execute file upload without running out of funds, This funding can be done offline from the admin wallet.
Smart Contract: The basic design of the smart contract has to ensure that it holds a mapping of the users struct and within a single user struct it should hold a mapping of the user’s file hashes.

---