This guide demonstrates how to create NFTs on the SOON using the Metaplex Foundation’s UMI framework, MPL Token Metadata program, and Pinata for IPFS storage.

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Prerequisites

Before you begin, make sure you have:
  • Node.js installed
  • A funded wallet on SOON testnet
  • Pinata account for IPFS storage

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Setting up Pinata

  1. Visit Pinata Cloud and create an account
  2. Once registered, go to API Keys section
  3. Create a new API key with the permissions you need
  4. Save your JWT token and Gateway token
  5. Create a .env file in your project root:
PINATA_JWT=your_jwt_token_here
PINATA_GATEWAY_TOKEN=your_gateway_token_here

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Implementation

Let’s break down the code that creates NFTs on SOON: 
import {
  percentAmount,
  generateSigner,
  createSignerFromKeypair,
  signerIdentity,
} from "@metaplex-foundation/umi";
import {
  createNft,
  mplTokenMetadata,
} from "@metaplex-foundation/mpl-token-metadata";
import { createUmi } from "@metaplex-foundation/umi-bundle-defaults";
import { Keypair, LAMPORTS_PER_SOL } from "@solana/web3.js";
import { base58 } from "@metaplex-foundation/umi/serializers";
import { PinataSDK } from "pinata-web3";
import dotenv from "dotenv";

dotenv.config();

// Initialize UMI with SOON testnet
const umi = createUmi("https://rpc.testnet.soo.network/rpc").use(
  mplTokenMetadata()
);

​
Setting up the Wallet

// Create keypair and signer
const payerSecretKey = new Uint8Array([]); // Your wallet's secret key
let keypair = umi.eddsa.createKeypairFromSecretKey(payerSecretKey);
const balance = await umi.rpc.getBalance(keypair.publicKey);
console.log(
  "Payer Balance:",
  (Number(balance.basisPoints) / LAMPORTS_PER_SOL).toFixed(2),
  "SOL"
);

const myKeypairSigner = createSignerFromKeypair(umi, keypair);
umi.use(signerIdentity(myKeypairSigner));

​
Creating NFT Metadata

const metadata = {
  name: "My NFT",
  description: "This is an NFT on SOON",
  image: "your_image_url",
  external_url: "https://x.com/soon-svm",
  attributes: [
    {
      trait_type: "trait1",
      value: "value1",
    },
    {
      trait_type: "trait2",
      value: "value2",
    },
  ],
  properties: {
    files: [
      {
        uri: "your_image_url",
        type: "image/png",
      },
    ],
    category: "image",
  },
};

​
Uploading to IPFS using Pinata

const pinata = new PinataSDK({
  pinataJwt: process.env.PINATA_JWT!,
  pinataGateway: "your_pinata_gateway",
});

const upload = await pinata.upload.json(metadata);
const metadatauri = `https://your_gateway.mypinata.cloud/ipfs/${upload.IpfsHash}?pinataGatewayToken=${process.env.PINATA_GATEWAY_TOKEN}`;

​
Creating the NFT

const tx = await createNft(umi, {
  mint: NFTsigner,
  sellerFeeBasisPoints: percentAmount(5.5),
  name: "My NFT",
  uri: metadatauri,
}).sendAndConfirm(umi);

​
Running the Code

  1. Install dependencies:
pnpm add @metaplex-foundation/umi @metaplex-foundation/mpl-token-metadata @solana/web3.js pinata-web3 dotenv
  1. Set up your environment variables in .env file
  2. Replace the placeholder values:
    • Your wallet’s secret key
    • Your NFT metadata
    • Your Pinata gateway
  3. Run the script: 
pnpm start

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Output

After successful execution, you’ll see:
  • Your wallet balance
  • IPFS upload confirmation
  • Metadata URI
  • Transaction signature
  • NFT mint address

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Security Considerations

  • Never commit your .env file or expose your secret keys
  • Store sensitive information securely
  • Ensure your wallet has sufficient SOON tokens for transactions

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Network Selection

The code is configured for SOON testnet. For different networks, update the RPC URL:
  • Devnet: https://rpc.devnet.soo.network/rpc
  • Testnet: https://rpc.testnet.soo.network/rpc

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Additional Resources