tProof | Everlasting certifications

tProof is a tool to generate everlasting evidence that a file exists at a given date (proof of timestamp).

tProof works by publishing the hash of your file on a public blockchain, making the proof everlasting and with a single upfront cost (generation transaction). The proof, generated in the form of an NFT, lasts forever, while the NFT standard makes it easy for you to recover it, whenever you'll need it.

This repo contains all the Smart Contracts involved in the tProof ecosystem.

More details about tProof and it's project available on tproof.io

You can directly interact with deployed smart contracts through dApp on app.tproof.io

Current we have an active deployment on the following networks:

• Polygon Mainnet (coming 26th Oct 22)
• Ethereum Goerli (test)

Full documentation available on docs.tproof.io

How it works 🔍

At its core, a SHA-256 checksum is generated for each file that wants to be generated. The hash is sent to the smart contract to be included in the list of the proofs. As a result, an NFT is generated. The NFT contains the hash, as well as other core information, such as the timestamp at which is has been created, a custom-name (optional) and others.

At the end of the process, all included in a single blockchain transaction, the user receives an NFT that represents the certification.

We can list the advantages of adopting such a technology to certify the existence of a file at a given timestamp, as follows:

✅ Everlasting proofs

✅ Single upfront cost

✅ Trustless, and transparent

✅ Open-source project

Find out more about tProof on our website, and on the project documentation.

Clone and Install 📋

Make sure to clone the repo and install all the dependencies via

yarn install

Deploy and Testing

This project has been developed with Hardhat development environment

⚠️ Before running any command, make sure to create a correct .secrets.json file in the main folder. You can find a .secrets.example.json file that you can copy.

To compile the contracts

npx hardhat compile

To run tests

npx hardhat test

To deploy

npx hardhat run scripts/Deployer/deploy.ts

More references about these commands can be found in hardhat docs.