batcher config validation maxframesize ✅

op-batcher/batcher/channel_builder.go

@@ -12,6 +12,7 @@ import (
 )
 
 var (
+	ErrMaxFrameSizeZero       = errors.New("max frame size cannot be zero")
 	ErrChannelTimeoutTooSmall = errors.New("channel timeout is less than the safety margin")
 	ErrInputTargetReached     = errors.New("target amount of input data reached")
 	ErrMaxFrameIndex          = errors.New("max frame index reached (uint16)")
@@ -77,6 +78,13 @@ func (cc *ChannelConfig) Check() error {
 		return ErrChannelTimeoutTooSmall
 	}
 
+	// If the [MaxFrameSize] is set to 0, the channel builder
+	// will infinitely loop when trying to create frames in the
+	// [channelBuilder.OutputFrames] function.
+	if cc.MaxFrameSize == 0 {
+		return ErrMaxFrameSizeZero
+	}
+
 	return nil
 }