diff --git a/pkg/smartcontract/context/context.go b/pkg/smartcontract/context/context.go
index 13d2927f7..2974e2675 100644
--- a/pkg/smartcontract/context/context.go
+++ b/pkg/smartcontract/context/context.go
@@ -62,6 +62,8 @@ func NewParameterContext(typ string, network netmode.Magic, verif crypto.Verifia
 	}
 }
 
+// GetCompleteTransaction clears transaction witnesses (if any) and refills them with
+// signatures from the parameter context.
 func (c *ParameterContext) GetCompleteTransaction() (*transaction.Transaction, error) {
 	tx, ok := c.Verifiable.(*transaction.Transaction)
 	if !ok {