Initial commit

scripts/check-ranger-mappers.js

@@ -0,0 +1,66 @@
+/**
+ * ponytail: assert ranger mapper invariants (standalone — CRA ESM can't require()).
+ * Keep in sync with src/lib/ranger/{helpers,mapTickers,depth}.js
+ * Run: node scripts/check-ranger-mappers.js
+ */
+const assert = require("assert");
+
+function generateSocketURI(baseUrl, streams) {
+  const sorted = [...(streams || []).filter(Boolean)].sort();
+  return `${String(baseUrl).replace(/\/+$/, "")}/?stream=${sorted.join("&stream=")}`;
+}
+
+function marketIdToShahooStatKeys(marketId) {
+  const id = String(marketId || "").toLowerCase();
+  const match = id.match(/^([a-z0-9]+?)(cad|irt|usdt)$/);
+  if (!match) return [];
+  return [`${match[1].toUpperCase()}_${match[2].toUpperCase()}`];
+}
+
+function shahooMarketToDenaId(marketKeyOrRoute) {
+  const normalized = String(marketKeyOrRoute || "")
+    .replace(/-/g, "_")
+    .toUpperCase();
+  const [base, quote] = normalized.split("_");
+  if (!base || !quote) return null;
+  return `${base.toLowerCase()}${quote.toLowerCase()}`;
+}
+
+function marketPublicStreams(marketId, { incremental = true } = {}) {
+  const id = String(marketId || "").toLowerCase();
+  if (!id) return [];
+  const depth = incremental ? `${id}.ob-inc` : `${id}.update`;
+  return [`${id}.trades`, depth];
+}
+
+function handleIncrementalUpdate(depthOld, newLevel, type) {
+  const prev = depthOld || [];
+  const index = prev.findIndex(([price]) => +price === +newLevel[0]);
+  if (index === -1 && +newLevel[1]) {
+    const data = [...prev, newLevel];
+    return type === "asks"
+      ? data.sort((a, b) => +a[0] - +b[0])
+      : data.sort((a, b) => +b[0] - +a[0]);
+  }
+  const result = [...prev];
+  if (Number(newLevel[1]) !== 0) result[index] = newLevel;
+  else result.splice(index, 1);
+  return type === "asks"
+    ? result.sort((a, b) => +a[0] - +b[0])
+    : result.sort((a, b) => +b[0] - +a[0]);
+}
+
+assert.deepStrictEqual(marketIdToShahooStatKeys("btcirt"), ["BTC_IRT"]);
+assert.strictEqual(shahooMarketToDenaId("BTC-IRT"), "btcirt");
+assert.deepStrictEqual(marketPublicStreams("btcirt"), [
+  "btcirt.trades",
+  "btcirt.ob-inc",
+]);
+const uri = generateSocketURI("wss://x/public", ["b", "a"]);
+assert.ok(uri.endsWith("?stream=a&stream=b"));
+assert.deepStrictEqual(
+  handleIncrementalUpdate([["100", "1"]], ["100", "0"], "asks"),
+  []
+);
+
+console.log("check-ranger-mappers: ok");