Chainlink Random Character Creation

This repo is a starting point for creating:

NFTs built with verifiable RNG using the Chainlink VRF
Create dynamic NFTs that change based on real world data. By using decentralized oracles to get data.
Adding your randomized NFTs to the OpenSea Marketplace

We will easily create our own NFT on the Rinkeby Chain. We can edit the name of the character in the generate-character.js script.

This will create a character with 6 attributes from 0 - 99:

uint256 strength;
uint256 dexterity;
uint256 constitution;
uint256 intelligence;
uint256 wisdom;
uint256 charisma;

And then:

uint256 experience;
string name;

Quickstart

Right now this repo only works with rinkeby. Run the following.

Setup Environment Variables

You'll need a MNEMONIC and a rinkeby RINKEBY_RPC_URL environment variable. Your MNEMONIC is your seed phrase of your wallet. You can find an RINKEBY_RPC_URL from node provider services like Infura

Then, either set them in a bash_profile file or export them into your terminal like:

export MNEMONIC='cat dog frog....'
export RINKEBY_RPC_URL='www.infura.io/asdfadsfafdadf'

Then you can get started with:

Clone The Repo and migrate

git clone https://github.com/PatrickAlphaC/dungeons-and-dragons-nft
cd dungeons-and-dragons-nft
npm install
truffle migrate --reset --network rinkeby

This will deploy your D&D NFT!

Generate a character

You can now try it out:

truffle exec scripts/fund-contract.js --network rinkeby
truffle exec scripts/generate-character.js --network rinkeby
truffle exec scripts/get-character.js --network rinkeby

This will create a new character with random stats! Depending how often you deploy, you can pick which character by changing the dnd.getCharacterOverView(1) command in get-character.js to swap the 0 out with whatever tokenId of the character you like.

This will give you the overview of your NFT. You'll see BN since the call returns big numbers, you can cast them to ints to see what they are.... Or you could go one step farther

See it on etherscan or onclickdapp

You can get an Etherscan API key for free and interact with the NFTs on chain. Then set ETHERSCAN_API_KEY as an environment variable.

truffle run verify DungeonsAndDragonsCharacter --network rinkeby --license MIT

This will verify and publish your contract, and you can go to the Read Contract section of etherscan that it gives you.

Otherwise, you can use oneclickdapp and just add the contract address and ABI. You can find the ABI in the build/contracts folder. Just remember it's not the whole file that is the ABI, just the section that says ABI.

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