Migrate from DeBank Cloud to GoldRush

// BEFORE -- DeBank: AccessKey header, chain_id query param, bare array back.
const res = await fetch(
  "https://pro-openapi.debank.com/v1/user/token_list" +
    "?id=" + address + "&chain_id=eth&is_all=false",
  { headers: { AccessKey: process.env.DEBANK_ACCESS_KEY } }
);
const tokens = await res.json(); // array, no wrapper

// AFTER -- GoldRush: Bearer header, chain in the path, wrapped envelope.
const res = await fetch(
  "https://api.covalenthq.com/v1/eth-mainnet/address/" + address + "/balances_v2/",
  { headers: { Authorization: "Bearer " + process.env.GOLDRUSH_API_KEY } }
);
const { data, error, error_message } = await res.json();
if (error) throw new Error(error_message);
const tokens = data.items;

// BEFORE -- DeBank pairs each endpoint with an all_* variant.
const res = await fetch(
  "https://pro-openapi.debank.com/v1/user/all_token_list?id=" + address,
  { headers: { AccessKey: process.env.DEBANK_ACCESS_KEY } }
);

// AFTER -- GoldRush uses a separate allchains path family.
const res = await fetch(
  "https://api.covalenthq.com/v1/allchains/address/" + address + "/balances/",
  { headers: { Authorization: "Bearer " + process.env.GOLDRUSH_API_KEY } }
);

// BEFORE -- DeBank's total_balance includes protocol positions
// (staking, lending, LPs) in the total.
const res = await fetch(
  "https://pro-openapi.debank.com/v1/user/total_balance?id=" + address,
  { headers: { AccessKey: process.env.DEBANK_ACCESS_KEY } }
);
const { total_usd_value } = await res.json();

// AFTER -- GoldRush sums token balances only. For a DeFi-heavy wallet
// this will read LOWER than DeBank's figure, because protocol positions
// are not decoded per protocol. Verify against a known wallet before
// putting this number in front of a user.
const res = await fetch(
  "https://api.covalenthq.com/v1/allchains/address/" + address + "/balances/",
  { headers: { Authorization: "Bearer " + process.env.GOLDRUSH_API_KEY } }
);
const { data, error, error_message } = await res.json();
if (error) throw new Error(error_message);

const total_usd_value = data.items.reduce((sum, t) => sum + (t.quote ?? 0), 0);