Feeds NFT

This is a demo repo showing you how to create NFTs that are dynamic based on price.

• Chainlink Price Feeds

Requirements

• NPM or YARN

Installation

Set your RINKEBY_RPC_URL environment variable.. You can get one for free at Infura's site. You'll also need to set the variable PRIVATE_KEY which is your private key from you wallet, ie MetaMask. This is needed for deploying contracts to public networks.

You can set these in your .env file if you're unfamiliar with how setting environment variables work. Check out our .env example. If you wish to use this method to set these variables, update the values in the .env.example file, and then rename it to '.env'

WARNING

Don't commit and push any changes to .env files that may contain sensitive information, such as a private key! If this information reaches a public GitHub repository, someone can use it to check if you have any Mainnet funds in that wallet address, and steal them!

.env example:

RINKEBY_RPC_URL='www.infura.io/asdfadsfafdadf'
PRIVATE_KEY='abcdef'
MAINNET_RPC_URL="https://eth-mainnet.alchemyapi.io/v2/your-api-key"

bash example

export RINKEBY_RPC_URL='www.infura.io/asdfadsfafdadf'
export MNEMONIC='cat dog frog...'
export MAINNET_RPC_URL="https://eth-mainnet.alchemyapi.io/v2/your-api-key"

If you plan on deploying to a local Hardhat network that's a fork of the Ethereum mainnet instead of a public test network like Kovan, you'll also need to set your MAINNET_RPC_URL environment variable. and uncomment the forking section in hardhat.config.js. You can get one for free at Alchemy's site..

You can also use a PRIVATE_KEY instead of a MNEMONIC environment variable by uncommenting the section in the hardhat.config.js, and commenting out the MNEMONIC line.

Then you can install all the dependencies

git clone https://github.com/patrickalphac/chainlink-the-graph/
cd chainlink-the-graph

then

npm install

Or

yarn

Deploy

Deployment scripts are in the deploy directory. If required, edit the desired environment specific variables or constructor parameters in each script, then run the hardhat deployment plugin as follows. If no network is specified, it will default to the Kovan network.

This will deploy to a local hardhat network.

npx hardhat deploy

To deploy to testnet:

npx hardhat deploy --network rinkeby

Create NFT & View on OpenSea

Once deployed, you can run a script to create a new NFT. It'll look something like this:

Feeds NFT Opensea

This will:

1. Deploy our NFT Feeds contract
2. Add a thumbsup and thumbsdown svg as our 2 imageURIs
3. Create 1 NFT

Important notes for SVGs

1. Make sure all the double quotes are single quotes

Using SVGs will allow you to make all the drawings directly on-chain, and store them on chain too! For example, you could store an SVG as a string, and then edit it to change your drawings.

Other Notes

1. I wasn't able to make data:image/png types work as an imageURI, but hypothetically it should.

Test

Tests are located in the test directory, and are split between unit tests and integration tests. Unit tests should only be run on local environments, and integration tests should only run on live environments.

To run unit tests:

npx harhat test

Verify on Etherscan

You'll need an ETHERSCAN_API_KEY environment variable. You can get one from the Etherscan API site.

npx hardhat verify --network <NETWORK> <CONTRACT_ADDRESS> <CONSTRUCTOR_PARAMETERS>

example:

npx hardhat verify --network kovan 0x9279791897f112a41FfDa267ff7DbBC46b96c296 "0x9326BFA02ADD2366b30bacB125260Af641031331"

Linting

yarn lint:fix