https://github.com/bitfede/file-validation-certification-dapp

This Dapp helps proving that a file existed on a certain point in time and also helps prove its integrity over future times
https://github.com/bitfede/file-validation-certification-dapp

Last synced: 22 days ago
JSON representation

This Dapp helps proving that a file existed on a certain point in time and also helps prove its integrity over future times

• Host: GitHub
• URL: https://github.com/bitfede/file-validation-certification-dapp
• Owner: bitfede
• License: mit
• Created: 2019-09-29T18:45:15.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2023-01-05T23:05:47.000Z (about 2 years ago)
• Last Synced: 2024-11-20T23:19:39.355Z (3 months ago)
• Language: JavaScript
• Homepage:
• Size: 5.43 MB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 21
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# File Integrity & Existence Certificate Dapp

This Decentralized Application will take a SHA256 digital signature of your file and write it to the Ethereum blockchain to prove its existence at the present time and future integrity.

## Installation

Clone the repo and `npm install` inside the root folder and inside the `client/` folder.

## Run and Test on a local blockchain

Run `truffle develop` or start Ganache, make sure the correct port is specified in the `truffle-config.js` file.

Then run `truffle compile` to compile the solidity contracts into bytecode, and finally run `truffle migrate` to deploy them to the local blockchain.

Then `cd` into the `client` folder and run `npm start` to start the front end on `localhost:3000`.

You should now be on the browser, make sure you have MetaMask installed. Connect with MetaMask to the `Localhost PORT_NUMBER` blockchain.

Send some ether to the metamask address using the truffle console by entering `web3.eth.sendTransaction({ from: accounts[0], to: '0x123_YOUR_METAMASK_ADDRESS', value: 10000000000000000000 })`. This sends 10 ETH to MetaMask.

You are now ready to use the dApp on localhost.

*Keep in mind that every time you restart the local blockchain you have to migrate your contracts again and also reset MetaMask by going to SETTINGS > ADVANCED > RESET ACCOUNT.*

## Deploy on testnet

To deploy on testnet we need a parity or geth node running so truffle can publish our contract to a testnet through the host:port using JSON RPC.

### How I did it

I wrote how I deployed the dApp on testnet on my blockchain-focused blog Blockchainlion.com.

The link to the full article is here [https://blockchainlion.com/deploy-ethereum-dapp-with-a-cloud-server/](https://blockchainlion.com/deploy-ethereum-dapp-with-a-cloud-server/)

## Deploy on mainnet

Same reasoning as deploying on testnet, but:

- Parity needs to run a mainnet node

- The `truffle-config.js` file needs to have a network config for mainnet

- Real ether need to be sent to the account that will deploy the contracts