123# NFT Parachain45## Project Description67The NFT Pallet is the core of NFT functionality. Like ERC-721 standard in Ethereum ecosystem, this pallet provides the8basement for creating collections of unique non-divisible things, also called Non Fungible Tokens (NFTs), minting NFT of9a given Collection, and managing their ownership.1011The pallet also enables storing NFT properties. Though (according to ERC-721) NFT properties belong to logic of a12concrete application that operates a Collection, so purposefully the NFT Tracking Module does not have any knowledge13about properties except their byte size leaving application logic out to be controlled by Smart Contracts.1415The NFT Chain also provides:1617- Smart Contracts Pallet and example smart contract that interacts with NFT Runtime18- ERC-1155 Functionality (currently PoC as Re-Fungible tokens, i.e. items that are still unique, but that can be split19 between multiple users)20- Variety of economic options for dapp producers to choose from to create freemium games and other ways to attract21 users. As a step one, we implemented an economic model when a collection sponsor can be set to pay for collection22 Transfer transactions.2324Wider NFT Ecosystem (most of it was developed during Hackusama):2526- [SubstraPunks Game hosted on IPFS](https://github.com/usetech-llc/substrapunks)27- [NFT Wallet and UI](https://uniqueapps.usetech.com/#/nft)28- [NFT Asset for Unity Framework](https://github.com/usetech-llc/nft_unity)2930Please see our [walk-thorugh instructions](doc/hackusama_walk_through.md) to try everything out!3132## Hackusama Update3334During the Kusama Hackaphon the following changes were made:3536- Enabled Smart Contracts Pallet37- Enabled integration between Smart Contracts and NFT Pallet (required special edition of RC4 Substrate version)38- Fixed misc. bugs in NFT Pallet39- Deployed NFT TestNet. Public node available at wss://unique.usetech.com, custom UI types - see below in this README.40- New Features:41 - Re-Fungible Token Mode42 - Off-Chain Schema to store token image URLs43 - Alternative economic model44 - White Lists and Public Mint Permission45- Use example: [SubstraPunks Game](https://github.com/usetech-llc/substrapunks), fully hosted on IPFS and NFT Testnet46 Blockchain.4748## Application Development4950If you are building an application that operates NFT tokens, use [this document](doc/application_development.md).5152## Building5354Building NFT chain requires special versions of Rust and toolchain. We don't use the most recent versions of everything55so that we can keep the builds stable.56571. Install Rust:5859```bash60curl https://sh.rustup.rs -sSf | sh61sudo apt-get install libssl-dev pkg-config libclang-dev clang62```63642. Remove all installed toolchains with `rustup toolchain list` and `rustup toolchain uninstall <toolchain>`.65663. Install stable toolchain 1.49.0 and make it default, install nightly 2021-01-27:6768```bash69rustup toolchain install 1.49.070rustup toolchain install nightly-2020-01-2771rustup default nightly-2021-01-2772```73744. Add wasm target for nightly toolchain:7576```bash77rustup target add wasm32-unknown-unknown --toolchain nightly-2021-01-2778```79805. Build:81```bash82cargo build83```8485optionally, build in release:86```bash87cargo build --release88```8990## Run9192You can start a development chain with:9394```bash95cargo run -- --dev96```9798Detailed logs may be shown by running the node with the following environment variables set:99`RUST_LOG=debug RUST_BACKTRACE=1 cargo run -- --dev`.100101If you want to see the multi-node consensus algorithm in action locally, then you can create a local testnet with two102validator nodes for Alice and Bob, who are the initial authorities of the genesis chain that have been endowed with103testnet units. Give each node a name and expose them so they are listed on the Polkadot104[telemetry site](https://telemetry.polkadot.io/#/Local%20Testnet). You'll need two terminal windows open.105106We'll start Alice's substrate node first on default TCP port 30333 with her chain database stored locally at107`/tmp/alice`. The bootnode ID of her node is `QmQZ8TjTqeDj3ciwr93EJ95hxfDsb9pEYDizUAbWpigtQN`, which is generated from108the `--node-key` value that we specify below:109110```bash111cargo run -- \112 --base-path /tmp/alice \113 --chain=local \114 --alice \115 --node-key 0000000000000000000000000000000000000000000000000000000000000001 \116 --telemetry-url ws://telemetry.polkadot.io:1024 \117 --validator118```119120In the second terminal, we'll start Bob's substrate node on a different TCP port of 30334, and with his chain database121stored locally at `/tmp/bob`. We'll specify a value for the `--bootnodes` option that will connect his node to Alice's122bootnode ID on TCP port 30333:123124```bash125cargo run -- \126 --base-path /tmp/bob \127 --bootnodes /ip4/127.0.0.1/tcp/30333/p2p/QmQZ8TjTqeDj3ciwr93EJ95hxfDsb9pEYDizUAbWpigtQN \128 --chain=local \129 --bob \130 --port 30334 \131 --telemetry-url ws://telemetry.polkadot.io:1024 \132 --validator133```134135Additional CLI usage options are available and may be shown by running `cargo run -- --help`.136137## Run Integration Tests1381391. Install all needed dependecies140```141cd tests142yarn install143```1441452. Run tests146```147yarn test148```149150151## Benchmarks152153First of all, add rust toolchain and make it default.154```bash155rustup target add wasm32-unknown-unknown --toolchain nightly-2020-10-01156```157158Then in "/node/src" run build command below159```bash160cargo +nightly-2020-10-01 build --release --features runtime-benchmarks161```162163Run benchmark164```bash165target/release/nft benchmark --chain dev --pallet "pallet_nft" --extrinsic "*" --repeat 1166```167168## UI custom types169170Moved to [runtime_types.json](./runtime_types.json).171172## Running Integration Tests173174See [tests/README.md](./tests/README.md).