How does Kaspa identify which lane a transaction belongs to?

Kaspa identifies a transaction's lane using a 20-byte field called the `lane_id`, which is the same as the transaction's existing `subnetwork_id` field. Every Kaspa transaction already carries a subnetwork ID as part of its structure — after the lane system activates, that same field does double duty as the lane selector. The network reads its byte pattern to determine which lane the transaction belongs to; any pattern that does not match a recognized valid form is rejected as invalid or reserved for future protocol use. For a beginner, the key takeaway is that the lane system slots into existing transaction structure rather than adding a new field, keeping the format compact while enabling multiple parallel execution tracks.