dNFT: NFT derivatives dApp

This dApp is a DeFi & Cross-chain Interoperability Hackathon submission and consists of two parts:

• front-end dApp, this repository
• a custom cw721-compatible contract with metadata extension

dNFT is a dApp that give NFT collectors an opportunity to mint derivtive NFT artworks based on the NFTs they already own. The derivative NFTs are procedurally generated based original NFTs and are fully owned by a collector. dNFT is completely decentralized, has no backend and all magic happens right in your browser.

This proof-of-concept dApp supports one generation method - Nerual Style Transfer. However, in the future, dNFT will support several generation methods and would allow adding new as plugins.

The smart contract behind dNFT is based on cw721 standard with metadata extension (see dcw721-contract repository). Any derivative NFT stores links (token_id) of the original NFTs and generation parameters. This allows to

• traceback any derivative back to the original artwork
• prove the ownership of the original NFTs in time of minting a derivative
• deterministically recreate any derivative artwork from sources
• make derivatives unique: an owner can't mint several derivatives with the same "derivation" method

When dNFT is fully developed into an NFT marketplace, it will allow the creators earn royalties from sale and re-sale of the derivatives based on their original NFTs.

Using the dApp

Connect to Terra Extension and wait for your collection to be loaded. Choose a content NFT (left) and apply to it the style of a another NFT (right). Try different parameeters and model settings. The resulting image can be minted as a derivative NFT. Click "Reload NFT Collection" to see your minted derivative.

Building and Running locally

To build dNFT dApp, install Yarn, go to the repository root and execute:

yarn install

yarn build

To launch dNFT locally, run:

yarn run start

Open the dApp in Google Chrome with Terra Extension installed.

Live Demo on Bombay-12 testnet

The live demo is available here: https://dare2defy.xyz

A link to vide demo: https://youtu.be/rsoNpKQ0HUo

You can use one of the following ready-made test accounts with original, pre-minted NFTs:

Account	Address	Mnemonic
test5	terra18wlvftxzj6zt0xugy2lr9nxzu402690ltaf4ss	second render cat sing soup reward cluster island bench diet lumber grocery repeat balcony perfect diesel stumble piano distance caught occur example ozone loyal
test7	terra17tv2hvwpg0ukqgd2y5ct2w54fyan7z0zxrm2f9	noble width taxi input there patrol clown public spell aunt wish punch moment will misery eight excess arena pen turtle minimum grain vague inmate
test9	terra1333veey879eeqcff8j3gfcgwt8cfrg9mq20v6f	index light average senior silent limit usual local involve delay update rack cause inmate wall render magnet common feature laundry exact casual resource hundred
test11	terra1jh0v64kew5agna23gzg6akuyqd46nrsk8kudks	october next pepper inject angry climb observe enable merry rebuild worry rhythm shallow throw panda cloud capital sunset insane badge maximum shoot destroy flag

You can use them to test the dApp and derivative minting using a pre-deployed contract terra1zzf3207sepmhs2t8f2j0zwsklgahrtchn5hxth on Bombay-12 testnet.

Note that only original minter, which is set when contract is created, can mint original NFTs. If you want to mint new original NFTs, you can use minter's account terra17lmam6zguazs5q5u6z5mmx76uj63gldnse2pdp with mnemonics

quality vacuum heart guard buzz spike sight swarm shove special gym robust assume sudden deposit grid alcohol choice devote leader tilt noodle tide penalty

Alternatively, you can deploy a brand new contract and make the dApp work with your contract by following the instruction below.

How to deploy your own contract (step-by-step instruction)

Uploadign and creating a contract

Before you start, you will need Chrome with Terra Extention installed.

• Create two Terra accounts: an original minter's account and an ownwer's account. They both will need some LUNA balance to pay for gas fees. For illustration, we are going to use
  • terra17lmam6zguazs5q5u6z5mmx76uj63gldnse2pdp as a minter's account
  • terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95 as an NFT owner's account
• First, we need to login to Terra Extention and authorize in https://station.terra.money/contracts with the minter's account

• Click "Upload" button, and upload cw721terra.wasm from the contract repository (see artifacts directory)

• In the "History" tab, find "Store" transaction for the code upload. You will see code_id 18145 in the transaction title.

• Alternatively, look at the transaction details and locate store code_id:

• Next, create a new contract with Code 18145 and InitMsg json as follows:

{"name":"dnft7", "symbol":"SMB", "minter":"terra17lmam6zguazs5q5u6z5mmx76uj63gldnse2pdp"}

Fields name and symbol can be arbitrary, the only important field in minter. Only this address can mint original NFTs, which could be later used by their owners to produce derivative artwork.

• After creating the contract, go to History tab and find MsgInstantiateContract transaction

• In this transaction details, locate contract_address field

• Your contract address is terra1zzf3207sepmhs2t8f2j0zwsklgahrtchn5hxth. Open index.html, find CONTRACT_ADDRESS in the <head> section and change it to your contract address:

<script>  
    const CONTRACT_ADDRESS = "terra1zzf3207sepmhs2t8f2j0zwsklgahrtchn5hxth";      
</script>

Manual minting of original NFTs

Currently, dNFT allows to mint only derivative NFTs. Original NFTs should be minted manually. Below are the sample transaction minting several NFTs with terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95 as an owner.

• {"mint":{"token_id":"vitalik_nakamoto", "owner":"terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95", "extension": {"external_url": "https://ipfs.infura.io/ipfs/Qmf1FKrkPeipuhMdw8LUCXcwgd2QibB9vUmyJsaZXPkBeD"}}}

• {"mint":{"token_id":"becca_notices", "owner":"terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95", "extension": {"external_url": "https://ipfs.infura.io/ipfs/QmYvKtfCLZaNbM9D1f2TsCPSaaDYNu6dB6f8M5gcVCu7uU"}}}

• {"mint":{"token_id":"bored_ape", "owner":"terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95", "extension": {"external_url": "https://ipfs.infura.io/ipfs/QmUZw1yGJexUyvsCeX6QPYsFJJfShCsqvkvEhdDHJuzMWZ"}}}

• {"mint":{"token_id":"towers", "owner":"terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95", "extension": {"external_url": "https://ipfs.infura.io/ipfs/QmYgfE5seqrh2khVH8WTdLTLMySA4Wzse18ghQ5i5Kdh5C"}}}

• {"mint":{"token_id":"trees", "owner":"terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95", "extension": {"external_url": "https://ipfs.infura.io/ipfs/QmeXTrnoVsPdqiUpzkcrmZRWC8jC6e4FK23HYFhc1sDDGw"}}}

• {"mint":{"token_id":"lizard", "owner":"terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95", "extension": {"external_url": "https://ipfs.infura.io/ipfs/QmQP321saFCEJPMA86sY2pCkUNFn1NQ9woLuLtYHmn5nz5"}}}

• {"mint":{"token_id":"tyler", "owner":"terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95", "extension": {"external_url": "https://ipfs.infura.io/ipfs/QmQVDGwSvigtCZwG8N3j7a1b6LWsgudwgcsTjakncmrXte"}}}

• {"mint":{"token_id":"f1", "owner":"terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95", "extension": {"external_url": "https://ipfs.infura.io/ipfs/QmerJuL4RPs9s6huJyGQT3sPp32RonHg6vnRgxVe5YpNGZ"}}}

• {"mint":{"token_id":"78022", "owner":"terra1757tkx08n0cqrw7p86ny9lnxsqeth0wgp0em95", "extension": {"external_url": "https://ipfs.infura.io/ipfs/QmeeeLBTgMKSGybSMj44SoWR5XseiJHB8ratq25qggUaGs"}}}

Note: If you mint new NFTs, make sure that they have unique token_id values.