diff --git a/indexedDb/impl/channels/implementation.go b/indexedDb/impl/channels/implementation.go
index 3657d634dad2e600f0def746abba74329a465740..803331357caa122fe00aaca7c77c296e21d4e3df 100644
--- a/indexedDb/impl/channels/implementation.go
+++ b/indexedDb/impl/channels/implementation.go
@@ -419,8 +419,7 @@ func (w *wasmModel) receiveHelper(
 	result, err := impl.Put(w.db, messageStoreName, messageObj)
 	// FIXME: The following is almost certainly causing a bug
 	// where all of our upsert operations are failing.
-	if err != nil && !strings.Contains(err.Error(),
-		"at least one key does not satisfy the uniqueness requirements") {
+	if err != nil && !strings.Contains(err.Error(), impl.ErrUniqueConstraint) {
 		// Only return non-unique constraint errors so that the case
 		// below this one can be hit and handle duplicate entries properly.
 		return 0, errors.Errorf("Unable to put Message: %+v", err)
diff --git a/indexedDb/impl/dm/implementation.go b/indexedDb/impl/dm/implementation.go
index 592719ad79cbe2972510c396444cd80e2754b4fe..d7582ea6b3d2268c0ce42d949ec743ae0d0db287 100644
--- a/indexedDb/impl/dm/implementation.go
+++ b/indexedDb/impl/dm/implementation.go
@@ -290,8 +290,7 @@ func (w *wasmModel) receiveHelper(
 	result, err := impl.Put(w.db, messageStoreName, messageObj)
 	// FIXME: The following is almost certainly causing a bug
 	// where all of our upsert operations are failing.
-	if err != nil && !strings.Contains(err.Error(),
-		"at least one key does not satisfy the uniqueness requirements") {
+	if err != nil && !strings.Contains(err.Error(), impl.ErrUniqueConstraint) {
 		// Only return non-unique constraint errors so that the case
 		// below this one can be hit and handle duplicate entries properly.
 		return 0, errors.Errorf("Unable to put Message: %+v", err)
diff --git a/indexedDb/impl/utils.go b/indexedDb/impl/utils.go
index 0fdb2315a1f580a675d7ebb93a257fd153056aae..93446fc101c94bbffe5c31427fa6c93b9142a3a2 100644
--- a/indexedDb/impl/utils.go
+++ b/indexedDb/impl/utils.go
@@ -30,6 +30,9 @@ const (
 
 	// ErrDoesNotExist is an error string for got undefined on Get operations.
 	ErrDoesNotExist = "result is undefined"
+
+	// ErrUniqueConstraint is an error string for failed uniqueness inserts.
+	ErrUniqueConstraint = "at least one key does not satisfy the uniqueness requirements"
 )
 
 // NewContext builds a context for indexedDb operations.