import { Avalanche } from "@avalanche-sdk/chainkit";

const avalanche = new Avalanche({
  network: "mainnet",
});

async function run() {
  const result = await avalanche.data.primaryNetwork.getChainIdsForAddresses({
    addresses: "avax1h2ccj9f5ay5acl6tyn9mwmw32p8wref8vl8ctg",
  });

  console.log(result);
}

run();

{
  "addresses": [
    {
      "address": "<string>",
      "blockchainIds": [
        "11111111111111111111111111111111LpoYY"
      ]
    }
  ]
}