Build an AI-Powered NFT Generator on Solana with Next.js

// src/app/api/generate/route.ts
import { NextRequest, NextResponse } from "next/server";
import OpenAI from "openai";
 
const openai = new OpenAI({ apiKey: process.env.OPENAI_API_KEY });
 
export async function POST(req: NextRequest) {
  const { prompt, style } = await req.json();
 
  if (!prompt) {
    return NextResponse.json({ error: "Prompt is required" }, { 

npm install @irys/sdk

// src/lib/arweave.ts
import Irys from "@irys/sdk";
 
export async function uploadToArweave(
  data: Buffer,
  contentType: string
): Promise<string> {
  const irys = new Irys({
    url: "https://devnet.irys.xyz",
    token: "solana",
    key: process.env.ARWEAVE_WALLET_KEY,
    config: {
      providerUrl: process.env.SOLANA_RPC_URL,
    },
  });
 
  const receipt

// src/app/api/upload/route.ts
import { NextRequest, NextResponse } from "next/server";
import { uploadToArweave, uploadMetadata } from "@/lib/arweave";
 
export async function POST(req: NextRequest) {
  const { imageBase64, name, description, attributes } = await req.json();
 
  // Upload image
  const imageBuffer = Buffer.from(imageBase64, "base64");
  const imageUri = await uploadToArweave(imageBuffer, 

npm install @metaplex-foundation/mpl-token-metadata \
  @metaplex-foundation/umi \
  @metaplex-foundation/umi-bundle-defaults \
  @metaplex-foundation/umi-signer-wallet-adapters

// src/lib/mint.ts
import { createUmi } from "@metaplex-foundation/umi-bundle-defaults";
import {
  createNft,
  mplTokenMetadata,
} from "@metaplex-foundation/mpl-token-metadata";
import { walletAdapterIdentity } from "@metaplex-foundation/umi-signer-wallet-adapters";
import { generateSigner, percentAmount } from "@metaplex-foundation/umi";
 
export async function mintNft(
  wallet: any,
  metadataUri: string,
  name: string,
) {
  const umi = createUmi(process

"use client";
import { useState } from "react";
import { useWallet } from "@solana/wallet-adapter-react";
import { mintNft } from "@/lib/mint";
 
export function NftGenerator() {
  const wallet = useWallet();
  const [prompt, setPrompt] = useState("");
  const [style, setStyle] = useState("digital art");
  const [preview, setPreview] = useState<string | null

import { createNft, verifyCollectionV1 } from "@metaplex-foundation/mpl-token-metadata";
 
// Create collection NFT (one-time)
const collectionMint = generateSigner(umi);
await createNft(umi, {
  mint: collectionMint,
  name: "AI Art Collection",
  symbol: "AICOL",
  uri: collectionMetadataUri,
  sellerFeeBasisPoints: percentAmount(5),
  isCollection: true,
}).sendAndConfirm(umi);
 
// When minting individual NFTs, pass the collection
await createNft(umi, {