Kraken Token

This repository contains an ERC-721 token smart contract and some auxiliary code to test and deploy the contract.

Prerequisites 📃

Install Node.js
Clone this repository
Navigate to the directory with the cloned code
Install Hardhat with npm install --save-dev hardhat
Create a MetaMask wallet
- Install MetaMask Chrome extension
- Add Polygon Mainnet to MetaMask
- Switch to Polygon Mainnet
Create a file called .env in the root of the project with the same contents as .env.example
Copy your private key from MetaMask to .env file

POLYGON_PRIVATE_KEY=***your private key from MetaMask***

Create an account on Polygonscan
- Go to "My Profile" - "API_KEYs"
- Create a new API KEY
- Copy "Api-Key Token"
Copy your Polygonscan API KEY to .env file

POLYGONSCAN_API_KEY=***your API key from Polygonscan***

⚠️DO NOT SHARE YOUR .env FILE IN ANY WAY OR YOU RISK TO LOSE ALL YOUR FUNDS⚠️

Next steps will show you how to build and deploy the contract 💻.

1. Build

npx hardhat compile

2. Test

npx hardhat test

Move to the "Deploy" step only if all tests pass!

3. Deploy

а) Mumbai test network
Make sure you have enough MATIC for testnet. You can get it for free from faucet.

npx hardhat run scripts/deploy.js --network mumbai

b) Polygon main network
Make sure you have enough MATIC in your wallet. Deployment to the mainnet costs real MATIC!

npx hardhat run scripts/deploy.js --network polygon

Deployment script takes more than 1.5 minutes to complete. Please, be patient.
After the contract gets deployed and verified you can find its address in the deployOutput.json file. Use it to interact with the contract.

Main Function

giveMeToken:

Issues one (and only one) token for the caller
Can be called by anyone
No additional payments except for gas fees