\ud83c\udfa8 How to Deploy an ERC721 NFT Factory Contract with IPFS Metadata
\ud83d\udee0 Step 1: Use the Correct Smart Contract Code<\/p>\n\n\n\n
\/\/ SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;<\/p>\n\n\n\n
import “@openzeppelin\/contracts\/security\/ReentrancyGuard.sol”;
import “@openzeppelin\/contracts\/token\/ERC721\/extensions\/ERC721URIStorage.sol”;
import “@openzeppelin\/contracts\/access\/Ownable.sol”;<\/p>\n\n\n\n
\/**<\/p>\n\n\n\n
uint256 tokenId = tokenCounter; string memory uri = uriList[currentURIIndex]; _safeMint(to, tokenId); _setTokenURI(tokenId, uri); emit NFTMinted(to, tokenId, uri); tokenCounter += 1; currentURIIndex = (currentURIIndex + 1) % uriList.length; return tokenId;<\/code> }
}<\/li>\n<\/ul>\n\n\n\n\ud83e\udde9 Step 2: Prepare Your Image Files<\/p>\n\n\n\n
Create a folder and add all your 512x512 or 1024x1024 images.\n\nRename them cleanly to charly1.png, charly2.png, etc.<\/code><\/pre>\n\n\n\n\ud83d\udda5 Rename in Ubuntu:<\/p>\n\n\n\n
a=1; for f in *.png; do mv “$f” “charly${a}.png”; ((a++)); done<\/p>\n\n\n\n
\ud83d\udccc This assumes all files are .png. Change the extension if needed.
\ud83d\udce4 Step 3: Upload to IPFS (via Pinata)<\/p>\n\n\n\n
Go to https:\/\/app.pinata.cloud\n\nUpload the folder with all renamed images\n\nYou\u2019ll receive a CID like:\n\nbafybeibtxyt5gwhbywi6z6y6gdqach4bxoq62yp7kl24mvkrlc6ii54zte<\/code><\/pre>\n\n\n\nNow your images live at:<\/p>\n\n\n\n
ipfs:\/\/bafy\u2026\/charly1.png
ipfs:\/\/bafy\u2026\/charly2.png<\/p>\n\n\n\n
\ud83d\udcc4 Step 4: Generate Metadata JSON Files<\/p>\n\n\n\n
Create a file called generateMetadata.js:<\/p>\n\n\n\n
const fs = require(“fs”);
const path = require(“path”);<\/p>\n\n\n\n
const imageCID = “bafybeibtxyt5gwhbywi6z6y6gdqach4bxoq62yp7kl24mvkrlc6ii54zte”;
const total = 58;
const outputDir = “.\/metadata”;<\/p>\n\n\n\n
if (!fs.existsSync(outputDir)) fs.mkdirSync(outputDir);<\/p>\n\n\n\n
for (let i = 1; i <= total; i++) {
const metadata = {
name: Charly NFT #${i}<\/code>,
description: “Part of the official Charly NFT collection”,
image: ipfs:\/\/${imageCID}\/charly${i}.png<\/code>,
attributes: [
{ trait_type: “Breed”, value: “White Swiss Shepherd” },
{ trait_type: “Generation”, value: “Genesis” },
{ trait_type: “Edition”, value: ${i}<\/code> }
]
};<\/p>\n\n\n\nfs.writeFileSync(
path.join(outputDir, ${i}.json<\/code>),
JSON.stringify(metadata, null, 2)
);
}<\/p>\n\n\n\nconsole.log(\u2705 Done. Metadata written to ${outputDir}\/<\/code>);<\/p>\n\n\n\nThen run it:<\/p>\n\n\n\n
npm init -y
node generateMetadata.js<\/p>\n\n\n\n
\ud83d\udce4 Step 5: Upload Metadata to IPFS<\/p>\n\n\n\n
Upload the entire \/metadata folder to Pinata\n\nYou\u2019ll get a CID like:\n\nbafybeihm5albdxvs5xosbfuczd5hbqi72apyrxpyttt4bkjymtdm5tgrge<\/code><\/pre>\n\n\n\nNow your URIs are:<\/p>\n\n\n\n
ipfs:\/\/bafy\u2026\/1.json
ipfs:\/\/bafy\u2026\/2.json
\u2026
ipfs:\/\/bafy\u2026\/58.json<\/p>\n\n\n\n
\ud83d\ude80 Step 6: Deploy Your Contract<\/p>\n\n\n\n
Use Remix:<\/p>\n\n\n\n
In the constructor, paste:<\/p>\n\n\n\n
[
“ipfs:\/\/bafy\u2026\/1.json”,
“ipfs:\/\/bafy\u2026\/2.json”,
“ipfs:\/\/bafy\u2026\/3.json”
\/\/ \u2026 up to 58
]<\/p>\n\n\n\n
If Remix slows down, split into chunks and use the addUris() function.
\ud83d\udc36 Step 7: Mint the NFTs!<\/p>\n\n\n\n
Use mintExactNFT(to) to mint NFTs one by one using the next URI in the cycle.<\/p>\n\n\n\n
It\u2019ll start from 1.json, then 2.json, then wrap around.<\/p>\n\n\n\n
\ud83d\udca1 Pro Tip: Use AI to generate your full URI array if you don\u2019t want to write it manually. Just provide:<\/p>\n\n\n\n
Your IPFS metadata CID\n\nThe number of files<\/code><\/pre>\n\n\n\nExample output:<\/p>\n\n\n\n
[
“ipfs:\/\/bafy\u2026\/1.json”,
“ipfs:\/\/bafy\u2026\/2.json”,
\u2026
“ipfs:\/\/bafy\u2026\/58.json”
]<\/p>\n\n\n\n
You’re done! \ud83c\udf89 You now have a full ERC721 NFT factory setup ready for production or testnet.<\/p>\n\n\n\n
Let me know if you’d like me to turn this into a PDF, Markdown, or help embed it in a custom webpage for your project.<\/p>\n\n\n\n
ChatGPT can make mistakes. Check important info.<\/p>\n\n\n\n