docs: add comments

Author: tzdybal

sequencer.go

@@ -8,22 +8,34 @@ import (
 	"github.com/rollkit/go-sequencing"
 )
 
+// BasedSequencer implements go-sequencing API with based sequencing logic.
+//
+// All transactions are passed directly to DA to be saved in a namespace. Each transaction is submitted as separate blob.
+// When batch is requested DA blocks are scanned to read all blobs from given namespace at given height.
 type BasedSequencer struct {
 	da da.DA
 }
 
+// NewSequencer initializes a BasedSequencer with the provided DA implementation.
+func NewSequencer(da da.DA) *BasedSequencer {
+	return &BasedSequencer{da: da}
+}
+
 var _ sequencing.Sequencer = (*BasedSequencer)(nil)
 
+// SubmitRollupTransaction submits a transaction directly to DA, as a single blob.
 func (b *BasedSequencer) SubmitRollupTransaction(ctx context.Context, rollupId sequencing.RollupId, tx sequencing.Tx) error {
 	//TODO implement me
 	panic("implement me")
 }
 
+// GetNextBatch reads data from namespace in DA and builds transactions batches.
 func (b *BasedSequencer) GetNextBatch(ctx context.Context, lastBatchHash sequencing.Hash) (*sequencing.Batch, time.Time, error) {
 	//TODO implement me
 	panic("implement me")
 }
 
+// VerifyBatch ensures data-availability of a batch in DA.
 func (b *BasedSequencer) VerifyBatch(ctx context.Context, batchHash sequencing.Hash) (bool, error) {
 	//TODO implement me
 	panic("implement me")