Harbor SDK

示例：AltRank 篮子

这个示例是现货篮子。manifest 里 symbolMode 为 basket，并列出要比较的 symbol。每根 K 线对每个 symbol 读一条舆情，AltRank 更小的视为排名更好。

getSocial 只看平台已入库的点。某个 symbol 没有点时，示例把它的排名当成很靠后。
kv 里的 held 记下当前选中的 symbol。排名领先者没变时不再下单。
切换时用市价买入新的领先 symbol。示例没有卖出原来的标的，实盘前要补上换仓时的卖出。

完整示例：

const manifest = {
  name: "AltRank 篮子",
  version: "1.0.0",
  ccxtIds: ["binance"],
  markets: ["spot"],
  symbolMode: "basket",
  symbols: ["BINANCE:BTC/USDT", "BINANCE:ETH/USDT"],
  params: {},
  permissions: ["market", "order", "account"],
};
async function onBar(rt, bar) {
  const symbols = await rt.market.getSymbols();
  let best = symbols[0] || bar.symbol;
  let bestRank = 999999;
  for (const symbol of symbols) {
    const points = await rt.market.getSocial(symbol, 1);
    const rank = points.length ? Number(points[points.length - 1].altRank) : 999999;
    if (rank < bestRank) {
      bestRank = rank;
      best = symbol;
    }
  }
  const held = await rt.kvGet("held");
  if (held !== best) {
    await rt.order.create({
      clientOrderId: "alt-" + bar.time,
      symbol: best,
      side: "buy",
      type: "market",
      amount: "0.01",
    });
    await rt.kvSet("held", best);
  }
}

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