diff --git a/pkg/database/interface.go b/pkg/database/interface.go
index 0312687..c709b3d 100644
--- a/pkg/database/interface.go
+++ b/pkg/database/interface.go
@@ -8,23 +8,24 @@ import (
 // HashrateStore defines the interface for hashrate data persistence.
 // This interface allows for dependency injection and easier testing.
 type HashrateStore interface {
-	// InsertHashratePoint stores a hashrate measurement.
-	// If ctx is nil, a default timeout will be used.
+	// store.InsertHashratePoint(ctx, "xmrig", "xmrig", HashratePoint{Timestamp: time.Now(), Hashrate: 1234}, ResolutionHigh)
 	InsertHashratePoint(ctx context.Context, minerName, minerType string, point HashratePoint, resolution Resolution) error
 
-	// GetHashrateHistory retrieves hashrate history for a miner within a time range.
+	// points, err := store.GetHashrateHistory("xmrig", ResolutionHigh, time.Now().Add(-time.Hour), time.Now())
 	GetHashrateHistory(minerName string, resolution Resolution, since, until time.Time) ([]HashratePoint, error)
 
-	// GetHashrateStats retrieves aggregated statistics for a specific miner.
+	// stats, err := store.GetHashrateStats("xmrig")
+	// if stats != nil { log.Printf("avg: %d H/s", stats.AverageRate) }
 	GetHashrateStats(minerName string) (*HashrateStats, error)
 
-	// GetAllMinerStats retrieves statistics for all miners.
+	// allStats, err := store.GetAllMinerStats()
+	// for _, stats := range allStats { log.Printf("%s avg: %d H/s", stats.MinerName, stats.AverageRate) }
 	GetAllMinerStats() ([]HashrateStats, error)
 
-	// Cleanup removes old data based on retention settings.
+	// store.Cleanup(30) // remove data older than 30 days
 	Cleanup(retentionDays int) error
 
-	// Close closes the store and releases resources.
+	// store.Close()
 	Close() error
 }