temp fix to chainreader error when no workflows

core/capabilities/remote/executable/request/client_request_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
@@ -25,6 +26,13 @@ const (
 	workflowExecutionID1 = "95ef5e32deb99a10ee6804bc4af13855687559d7ff6552ac6dbb2ce0abbadeed"
 )
 
+func Test_Hex(t *testing.T) {
+	b := []byte{}
+
+	strResult := hexutil.Encode(b)
+	assert.Equal(t, "", strResult)
+}
+
 func Test_ClientRequest_MessageValidation(t *testing.T) {
 	lggr := logger.TestLogger(t)
 

core/services/workflows/syncer/workflow_registry.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"iter"
+	"strings"
 	"sync"
 	"time"
 
@@ -222,8 +223,11 @@ func (w *workflowRegistry) Start(_ context.Context) error {
 			w.lggr.Debugw("Loading initial workflows for DON", "DON", don.ID)
 			loadWorkflowsHead, err := w.initialWorkflowsStateLoader.LoadWorkflows(ctx, don)
 			if err != nil {
-				w.lggr.Errorw("failed to load workflows", "err", err)
-				return
+				// TODO - this is a temporary fix to handle the case where the contract is empty, to track: https://smartcontract-it.atlassian.net/browse/CAPPL-393
+				if !strings.Contains(err.Error(), "attempting to unmarshal an empty string while arguments are expected") {
+					w.lggr.Errorw("failed to load workflows", "err", err)
+					return
+				}
 			}
 
 			reader, err := w.getContractReader(ctx)