Creating NFTs with Smart Contracts and Python Brownie

In our previous article about the Non-Fungible tokens, we explained about the methods of ERC-721. In this tutorial, we are going to use those methods to write the simple_collectible.sol smart contract and deploy it on the Rinkeby chain. In other words, we are going to create NFTs with Python Brownie tools. But before that, we also want to connect our test wallet to https://testnets.opensea.io in order to create an account in OpenSea which is a marketplace for NFTs.

Creating NFTs with Python Brownie

// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

contract SimpleCollectible is ERC721 {
	uint256 public tokenCounter;
	constructor () public ERC721 ("Dogie", "DOG"){
		tokenCounter = 0;
}

	function createCollectible(string memory tokenURI) public returns (uint256){
		uint256 newTokenId = tokenCounter;
		_safeMint(msg.sender, newTokenId);
		_setTokenURI(newTokenId, tokenURI);
		tokenCounter = tokenCounter + 1;
		return newTokenId;
	}
}

sample_token_uri = "ipfs://Qmd9MCGtdVz2miNumBHDbvj8bigSgTwnr4SbyH6DNnpWdt?filename=0-PUG.json"
OPENSEA_URL = "https://testnets.opensea.io/assets/{}/{}"
def main():
    account = get_account()
    simple_collectible = SimpleCollectible.deploy({"from":account})
    tx = simple_collectible.createCollectible(sample_token_uri,{"from": account})
    tx.wait(1)
    print(f"Awesome, you can{OPENSEA_URL.format(simple_collectible.address,
    	simple_collectible.tokenCounter() - 1)}")

from brownie import accounts, network, config, Contract
from web3 import Web3

LOCAL_BLOCKCHAIN_ENVIRONMENTS = ["hardhat", "development", "ganache", "mainnet-fork"]

def get_account(index=None, id=None):
        if index:
		return accounts[index]
	if network.show_active() in LOCAL_BLOCKCHAIN_ENVIRONMENTS:
		return accounts[0]
	if id:
		return accounts.load(id)
	return accounts.add(config["wallets"]["from_key"])

dependencies:
	- OpenZeppelin/[email protected]
	- smartcontractkit/[email protected]

compiler:
	solc:
		remappings:
			- '@openzeppelin=OpenZeppelin/[email protected]'
			- '@chainlink=smartcontractkit/[email protected]'
dotenv: .env
wallets:
	from_key: ${PRIVATE_KEY}
networks:
	development:
		keyhash:'0x2ed0feb3e7fd2022120aa84fab1945545a9f2ffc9076fd6156fa96eaff4c1311'
		fee: 100000000000000000
	rinkeby:
		vrf_coordinator: '0xb3dCcb4Cf7a26f6cf6B120Cf5A73875B7BBc655B'
		link_token: '0x01BE23585060835E02B77ef475b0Cc51aA1e0709'
		keyhash:'0x2ed0feb3e7fd2022120aa84fab1945545a9f2ffc9076fd6156fa96eaff4c1311'
		fee: 100000000000000000 # 0.1

export PRIVATE_KEY=' Paste your private key here'
export WEB3_INFURA_PROJECT_ID='INFURA ID'
export ETHERSCAN_TOKEN=' Your API Key goes here'

Wrapping Up

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