add parameters validation

Author: pthmas

pkg/config/config.go

@@ -288,6 +288,20 @@ func (c *Config) Validate() error {
 			c.Node.LazyBlockInterval.Duration, c.Node.BlockTime.Duration)
 	}
 
+	// Validate pruning configuration
+	if c.Node.PruningEnabled {
+		// When pruning is enabled, pruning_interval must be >= 1
+		if c.Node.PruningInterval == 0 {
+			return fmt.Errorf("pruning_interval must be >= 1 when pruning is enabled")
+		}
+
+		// When pruning is enabled, keeping 0 blocks is contradictory; use pruning_enabled=false
+		// for archive mode instead.
+		if c.Node.PruningKeepRecent == 0 {
+			return fmt.Errorf("pruning_keep_recent must be > 0 when pruning is enabled; use pruning_enabled=false to keep all blocks")
+		}
+	}
+
 	return nil
 }