init

src/state/trade-log.ts

@@ -0,0 +1,19 @@
+export interface TradeLogEntry {
+  time: string;
+  type: string;
+  detail: string;
+}
+
+export function createTradeLog(maxEntries: number) {
+  const entries: TradeLogEntry[] = [];
+  function push(type: string, detail: string) {
+    entries.push({ time: new Date().toLocaleString(), type, detail });
+    if (entries.length > maxEntries) {
+      entries.shift();
+    }
+  }
+  function all() {
+    return entries;
+  }
+  return { push, all };
+}