Add LS overseas TR rate limits

internal/ls/client.go

@@ -207,6 +207,11 @@ func (c *Client) callEndpointAttempt(
 			return nil, err
 		}
 	}
+	if limiter := c.trLimiter(trCD); limiter != nil {
+		if err := limiter.Wait(ctx); err != nil {
+			return nil, err
+		}
+	}
 
 	method = strings.ToUpper(strings.TrimSpace(method))
 	if method == "" {
@@ -288,6 +293,29 @@ func (c *Client) callEndpointAttempt(
 	return out, nil
 }
 
+func (c *Client) trLimiter(trCD string) *ratelimit.Limiter {
+	rps, burst, ok := lsTRRateLimit(trCD)
+	if !ok {
+		return nil
+	}
+	appKey, _ := c.getCredentials()
+	if appKey == "" {
+		appKey = "default"
+	}
+	return ratelimit.Shared("ls-"+strings.ToLower(strings.TrimSpace(trCD)), rps, burst, appKey)
+}
+
+func lsTRRateLimit(trCD string) (float64, int, bool) {
+	switch strings.ToLower(strings.TrimSpace(trCD)) {
+	case TROverseasStockChart:
+		return 1, 1, true
+	case TROverseasStockQuote, "g3102", TROverseasStockInstrument, "g3106", TROverseasStockMaster:
+		return 10, 1, true
+	default:
+		return 0, 0, false
+	}
+}
+
 func (c *Client) refreshToken(ctx context.Context) error {
 	appKey, appSecret := c.getCredentials()
 	if appKey == "" || appSecret == "" {

internal/ls/client_test.go

@@ -239,6 +239,24 @@ func TestClientCallEndpoint_RetriesAfterInvalidCachedToken(t *testing.T) {
 	}
 }
 
+func TestLSTRRateLimit_UsesDocumentedOverseasQuotas(t *testing.T) {
+	t.Parallel()
+
+	rps, burst, ok := lsTRRateLimit(TROverseasStockChart)
+	if !ok || rps != 1 || burst != 1 {
+		t.Fatalf("g3204 limit = rps %v burst %d ok %v, want 1/1/true", rps, burst, ok)
+	}
+
+	rps, burst, ok = lsTRRateLimit(TROverseasStockQuote)
+	if !ok || rps != 10 || burst != 1 {
+		t.Fatalf("g3101 limit = rps %v burst %d ok %v, want 10/1/true", rps, burst, ok)
+	}
+
+	if _, _, ok := lsTRRateLimit(TRStockQuote); ok {
+		t.Fatalf("domestic stock quote should use the shared client limiter only")
+	}
+}
+
 func TestOverseasRealtimeKey_PadsToDocumentedWidth(t *testing.T) {
 	key, err := OverseasRealtimeKey("82", "AAPL")
 	if err != nil {