Add getLedgers

cmd/soroban-rpc/internal/db/ledger.go

@@ -71,7 +71,18 @@ func (r ledgerReader) GetLedger(ctx context.Context, sequence uint32) (xdr.Ledge
 }
 
 func (r ledgerReader) GetLedgers(ctx context.Context, startSequence uint32, endSequence uint32) ([]xdr.LedgerCloseMeta, error) {
-	return []xdr.LedgerCloseMeta{}, nil
+	sql := sq.Select("meta").
+		From(ledgerCloseMetaTableName).
+		Where(
+			sq.And{
+				sq.GtOrEq{"sequence": startSequence},
+				sq.LtOrEq{"sequence": endSequence},
+			})
+	var results []xdr.LedgerCloseMeta
+	if err := r.db.Select(ctx, &results, sql); err != nil {
+		return []xdr.LedgerCloseMeta{}, err
+	}
+	return results, nil
 }
 
 type ledgerWriter struct {

cmd/soroban-rpc/internal/transactions/cursor.go

@@ -43,6 +43,21 @@ func (c Cursor) UnmarshalJSON(b []byte) error {
 // 1 is returned if c is greater than other.
 // -1 is returned if c is less than other.
 func (c Cursor) Cmp(other interfaces.Cursor) int {
+	otherCursor := other.(*Cursor)
+
+	if c.LedgerSequence == otherCursor.LedgerSequence {
+		return cmp(c.TxIdx, otherCursor.TxIdx)
+	}
+	return cmp(c.LedgerSequence, otherCursor.LedgerSequence)
+}
+
+func cmp(a, b uint32) int {
+	if a < b {
+		return -1
+	}
+	if a > b {
+		return 1
+	}
 	return 0
 }