more health check fixes, check slot rate

src/core/healthCheck.ts

@@ -13,7 +13,7 @@ const HEALTH_CHECK_CONFIG = {
 	CHECK_INTERVAL_MS: 2000,
 	// Maximum time allowed between slot updates
 	MAX_SLOT_STALENESS_MS: 5000,
-	// Minimum expected slot advancement rate (slots per second)
+	// Minimum expected slot advancement rate (slots slower than 1 per second is problematic)
 	MIN_SLOT_RATE: 1,
 } as const;
 
@@ -49,19 +49,11 @@ function evaluateHealth(currentSlot: number): {
 	const timeDelta = now - globalHealthState.lastSlotTimestamp;
 	const slotDelta = currentSlot - globalHealthState.lastSlot;
 
-	// Update state if slot has progressed
+	// If slot has progressed, we are healthy, check rate and update state.
 	if (currentSlot > globalHealthState.lastSlot) {
+		// Update state
 		globalHealthState.lastSlot = currentSlot;
 		globalHealthState.lastSlotTimestamp = now;
-	}
-
-	// Check if slots are too stale
-	if (timeDelta > HEALTH_CHECK_CONFIG.MAX_SLOT_STALENESS_MS) {
-		return {
-			isHealthy: false,
-			reason: `No slot updates in ${timeDelta}ms (max ${HEALTH_CHECK_CONFIG.MAX_SLOT_STALENESS_MS}ms)`,
-		};
-	}
 
 		// Check if slot update rate is too low
 		const slotRate = (slotDelta / timeDelta) * 1000; // Convert to per second
@@ -77,6 +69,18 @@ function evaluateHealth(currentSlot: number): {
 		return { isHealthy: true };
 	}
 
+	// If slot has NOT progressed, check for staleness.
+	if (timeDelta > HEALTH_CHECK_CONFIG.MAX_SLOT_STALENESS_MS) {
+		return {
+			isHealthy: false,
+			reason: `No slot updates in ${timeDelta}ms (max ${HEALTH_CHECK_CONFIG.MAX_SLOT_STALENESS_MS}ms)`,
+		};
+	}
+
+	// Slot has not progressed, but not stale yet. Still healthy.
+	return { isHealthy: true };
+}
+
 let healthStatus: HEALTH_STATUS = HEALTH_STATUS.Ok;
 const setHealthStatus = (status: HEALTH_STATUS): void => {
 	healthStatus = status;

src/utils/tests/auctionParams.test.ts

@@ -6,7 +6,7 @@ import {
 	ZERO,
 	QUOTE_PRECISION,
 	PRICE_PRECISION,
-	BASE_PRECISION 
+	BASE_PRECISION,
 } from '@drift-labs/sdk';
 import {
 	createMarketBasedAuctionParams,

src/utils/utils.ts

@@ -22,7 +22,6 @@ import {
 	AssetType,
 	MainnetSpotMarkets,
 	DevnetSpotMarkets,
-	QUOTE_PRECISION,
 	PERCENTAGE_PRECISION_EXP,
 } from '@drift-labs/sdk';
 import { RedisClient } from '@drift/common/clients';