mint.js

const provider = new ethers.providers.JsonRpcProvider(
    'https://rpc.ankr.com/polygon_mumbai',
    80001
  );
const sdk = new ThirdwebSDK(provider, {
    gasless: {
      openzeppelin: {
        relayerUrl:
          '<my_webhook',
      },
    },
  });
const nftContract = sdk.getNFTCollection(
    '0x24bB3E4C3b2611976aA5494790Bd74e20F4CdeD3'
  );
const tx = await nftContract.mintTo(some_address, some_metadata);