Build a multi-chain portfolio tracker

async function getAllPositions(address) {
  const allPositions = [];
  let url = `https://api.zerion.io/v1/wallets/${address}/positions/?currency=usd&sort=value&filter[trash]=only_non_trash`;

  while (url) {
    const response = await fetch(url, { headers });
    const { data, links } = await response.json();
    allPositions.push(...data);
    url = links.next || null;
  }

  return allPositions;
}

const API_KEY = process.env.ZERION_API_KEY;
const BASE_URL = "https://api.zerion.io/v1";
const headers = {
  accept: "application/json",
  authorization: `Basic ${btoa(API_KEY + ":")}`,
};

const wallets = [
  { label: "Main", address: "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045" },
  { label: "Trading", address: "0x42b9df65b219b3dd36ff330a4dd8f327a6ada990" },
];

async function getPortfolio(address) {
  const res = await fetch(
    `${BASE_URL}/wallets/${address}/portfolio?currency=usd`,
    { headers }
  );
  return res.json();
}

// Fetch all wallets in parallel
const results = await Promise.all(
  wallets.map(async (w) => {
    const { data } = await getPortfolio(w.address);
    return { ...w, portfolio: data.attributes };
  })
);

let grandTotal = 0;
for (const w of results) {
  const total = w.portfolio.total.positions;
  grandTotal += total;
  console.log(`${w.label}: $${total.toFixed(2)}`);
}
console.log(`\nCombined: $${grandTotal.toFixed(2)}`);

const API_KEY = process.env.ZERION_API_KEY;
const BASE_URL = "https://api.zerion.io/v1";
const headers = {
  accept: "application/json",
  authorization: `Basic ${btoa(API_KEY + ":")}`,
};

const wallets = [
  { label: "Main", address: "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045" },
  { label: "Trading", address: "0x42b9df65b219b3dd36ff330a4dd8f327a6ada990" },
];

async function getPortfolio(address) {
  const res = await fetch(`${BASE_URL}/wallets/${address}/portfolio?currency=usd`, { headers });
  return res.json();
}

async function getPositions(address) {
  const res = await fetch(
    `${BASE_URL}/wallets/${address}/positions/?currency=usd&sort=value&filter[positions]=only_simple`,
    { headers }
  );
  return res.json();
}

async function getBalanceChart(address, period = "month") {
  const res = await fetch(
    `${BASE_URL}/wallets/${address}/charts/${period}?currency=usd`,
    { headers }
  );
  return res.json();
}

async function buildDashboard() {
  // 1. Aggregate portfolios
  const results = await Promise.all(
    wallets.map(async (w) => {
      const [portfolio, positions] = await Promise.all([
        getPortfolio(w.address),
        getPositions(w.address),
      ]);
      return { ...w, portfolio: portfolio.data.attributes, positions: positions.data };
    })
  );

  let grandTotal = 0;
  const chainTotals = {};

  console.log("=== WALLETS ===");
  for (const w of results) {
    const total = w.portfolio.total.positions;
    const change = (w.portfolio.changes.percent_1d * 100).toFixed(2);
    grandTotal += total;
    console.log(`${w.label} (${w.address.slice(0, 8)}...): $${total.toFixed(2)} (${change}% 24h)`);

    for (const [chain, value] of Object.entries(w.portfolio.positions_distribution_by_chain)) {
      chainTotals[chain] = (chainTotals[chain] || 0) + value;
    }
  }
  console.log(`\nCombined total: $${grandTotal.toFixed(2)}`);

  // 2. Chain breakdown
  console.log("\n=== BY CHAIN ===");
  const sortedChains = Object.entries(chainTotals).sort((a, b) => b[1] - a[1]);
  for (const [chain, value] of sortedChains) {
    const pct = ((value / grandTotal) * 100).toFixed(1);
    console.log(`  ${chain}: $${value.toFixed(2)} (${pct}%)`);
  }

  // 3. Top holdings across all wallets
  const allPositions = results.flatMap((w) =>
    w.positions.map((p) => ({ ...p, wallet: w.label }))
  );
  allPositions.sort((a, b) => (b.attributes.value || 0) - (a.attributes.value || 0));

  console.log("\n=== TOP HOLDINGS (ALL WALLETS) ===");
  for (const pos of allPositions.slice(0, 10)) {
    const { fungible_info, value, quantity } = pos.attributes;
    const chain = pos.relationships.chain.data.id;
    console.log(
      `  ${fungible_info.symbol} on ${chain} (${pos.wallet}): ${quantity.float} (${value != null ? `$${value.toFixed(2)}` : "N/A"})`
    );
  }

  // 4. Balance chart for first wallet
  const chart = await getBalanceChart(wallets[0].address, "month");
  console.log(`\n=== ${wallets[0].label.toUpperCase()} - 1 MONTH CHART ===`);
  // Sample 5 evenly-spaced points for a quick overview
  const points = chart.data.attributes.points;
  const step = Math.max(1, Math.floor(points.length / 5));
  for (let i = 0; i < points.length; i += step) {
    const date = new Date(points[i][0] * 1000).toLocaleDateString();
    console.log(`  ${date}: $${points[i][1].toFixed(2)}`);
  }
}

buildDashboard();