#NirvanaNFT

This is the source repository for the #NirvanaNFT project. Each of the 3000+ tokens available for minting is not only a cool NFT to trade and collect (no 3rd-party service needed) but provides the current owner with access to a day's worth of chat log of #nirvana on IRCnet between 2011 and 2021.

To quote Tim O'Reilly:

"[…] to build bridges between the self-referential world of crypto assets being bought with cryptocurrencies and a working economic system where the Web3 economy is linked to actual ownership or the utility of non-Web 3 assets."

This basically is a PoC for such a bridge (in addition to a good excuse for having some fun and poking at new technology).

The contract is meant to be deployed on the Rinkeby Ethereum test network.

Backend

The backend constists of a Node.js server to provide endpoints for meta data, token image referenced therein and retrieval of chat log represented by a token. Requests to the latter need to be signed by the current token owner. The token image endpoint requires ImageMagick to be available on the host. See source code for details.

Running in development mode (npm run dev), a local Ethereum node running on port 8545 is assumed and queried directly. When using public networks in production mode (npm start), the contract is queried using external service APIs. Put credentials for these services (Etherscan and Infura) in a local .env file to make them available as environment variables:

• ETHERSCAN_API_KEY
• INFURA_ID
• INFURA_SECRET

(There's also the ALLOW_LOGS variable which can be filled with a comma-separated list of addresses log retrieval should be limited to. And if opensea.io integration is desired, OWNER is required too.)

Contract

The contract is based on the ERC721 non-fungible token standard and was written in Solidity utilizing the OpenZeppelin library and Hardhat Ethereum development suite.

Tokens can not only be minted but put up for sale for an individual price by the owner. If a token is resold, the contract collects a 10% fee.

You can use basic Hardhat commands like:

• npx hardhat help
• npx hardhat accounts
• npx hardhat clean
• npx hardhat compile
• npx hardhat node
• npx hardhat test

There are some helper scripts available too:

• npx hardhat run scripts/deploy.js --network <localhost|mainnet|rinkeby>
• npx hardhat run scripts/fund.js --network <localhost|mainnet|rinkeby>
• npx hardhat run scripts/pause.js --network <localhost|mainnet|rinkeby>
• npx hardhat run scripts/unpause.js --network <localhost|mainnet|rinkeby>

Most of the scripts require the same environment variables as the backend (for the same reason).

When deploying to a public network, the deploy.js script additionally requires the private key of the address the contract should be deployed with to be available as DAPK.

The fund.js script simply transfers 10 ETH from the contract owner address to an address found in in the ADDRESS_TO_FUND environment variable for testing purposes.

Frontend

The frontend is a 100% custom single-page web app rendered with Preact. It also uses

• Twind for leight-weight styling
• Day.js to make handling dates easier
• Ethers to interact with the contract
• Metamask as a web3 provider

and is bundled into browser-native JavaScript modules with Snowpack. Available npm commands:

• npm run dev: runs a local dev server with hot-module-reloading
• npm run build: builds all static assets for deploying into build/
• npm run serve: serves up build/ for testing purposes

Have fun!