Bug: Error RESOURCE_EXHAUSTED GetTransactions (#849)

* Pagination can't be empty

* set default pagination

Co-authored-by: Nawi Kartini <[email protected]>
Co-authored-by: Ariasa Ketut <[email protected]>

Author: nawikart

api/handler/transactionHandler.go

@@ -5,7 +5,10 @@ import (
 
 	"github.com/zoobc/zoobc-core/api/service"
 	"github.com/zoobc/zoobc-core/common/chaintype"
+	"github.com/zoobc/zoobc-core/common/constant"
 	"github.com/zoobc/zoobc-core/common/model"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 )
 
 // TransactionHandler handles requests related to transactions
@@ -41,6 +44,19 @@ func (th *TransactionHandler) GetTransactions(
 		err      error
 	)
 
+	pagination := req.GetPagination()
+	if pagination == nil {
+		pagination = &model.Pagination{
+			OrderField: "timestamp",
+			OrderBy:    model.OrderBy_DESC,
+			Page:       0,
+			Limit:      constant.MaxAPILimitPerPage,
+		}
+	}
+	if pagination.GetLimit() > constant.MaxAPILimitPerPage {
+		return nil, status.Errorf(codes.OutOfRange, "Limit exceeded, max. %d", constant.MaxAPILimitPerPage)
+	}
+
 	chainType := chaintype.GetChainType(0)
 	response, err = th.Service.GetTransactions(chainType, req)
 	if err != nil {