nft.js

const {
  Client,
  TokenCreateTransaction,
  PrivateKey,
  TokenType,
  TokenSupplyType,
  TokenMintTransaction,
  TokenNftInfoQuery,
  NftId,
} = require("@hashgraph/sdk");

const accountId = ".....";
const privateKey =
  "....";

const client = Client.forTestnet();
client.setOperator(accountId, privateKey);

async function main() {
  const bomThoiToken = await new TokenCreateTransaction()
    .setTokenName("Bom Thoi")
    .setTokenSymbol("BT")
    .setDecimals(0)
    .setInitialSupply(0)
    .setSupplyKey(PrivateKey.fromString(privateKey))
    .setTokenType(TokenType.NonFungibleUnique)
    .setSupplyType(TokenSupplyType.Finite)
    .setMaxSupply(10)
    .setTreasuryAccountId(accountId)
    .execute(client);

  const tokenReceipt = await bomThoiToken.getReceipt(client);
  const tokenId = tokenReceipt.tokenId;

  console.log("The new token ID is: " + tokenId);

  // Minting
  const token_1 = await new TokenMintTransaction()
    .setTokenId(tokenId)
    .setMetadata([Buffer.from("Some metaData")])
    .execute(client);

  const receipt = await token_1.getReceipt(client);

  const nft_serial = receipt.serials[0].toNumber();

  console.log("NTF serial is: ", nft_serial);

  const nft_info = await new TokenNftInfoQuery()
    .setNftId(new NftId(tokenId, nft_serial))
    .execute(client);

  const metadata = nft_info[0].metadata.toString();

  console.log("Token Metadata is: ", metadata);
}

main();