diff --git a/pkg/neorpc/types.go b/pkg/neorpc/types.go
index aa20ec50c..20e1d2359 100644
--- a/pkg/neorpc/types.go
+++ b/pkg/neorpc/types.go
@@ -72,29 +72,34 @@ type (
 	}
 
 	// BlockFilter is a wrapper structure for the block event filter. It allows
-	// to filter blocks by primary index and by block index (allowing blocks since
-	// the specified index).
+	// to filter blocks by primary index and/or by block index (allowing blocks
+	// since/till the specified index inclusively). nil value treated as missing
+	// filter.
 	BlockFilter struct {
 		Primary *int    `json:"primary,omitempty"`
 		Since   *uint32 `json:"since,omitempty"`
 		Till    *uint32 `json:"till,omitempty"`
 	}
 	// TxFilter is a wrapper structure for the transaction event filter. It
-	// allows to filter transactions by senders and signers.
+	// allows to filter transactions by senders and/or signers. nil value treated
+	// as missing filter.
 	TxFilter struct {
 		Sender *util.Uint160 `json:"sender,omitempty"`
 		Signer *util.Uint160 `json:"signer,omitempty"`
 	}
 	// NotificationFilter is a wrapper structure representing a filter used for
 	// notifications generated during transaction execution. Notifications can
-	// be filtered by contract hash and by name.
+	// be filtered by contract hash and/or by name. nil value treated as missing
+	// filter.
 	NotificationFilter struct {
 		Contract *util.Uint160 `json:"contract,omitempty"`
 		Name     *string       `json:"name,omitempty"`
 	}
-	// ExecutionFilter is a wrapper structure used for transaction execution
-	// events. It allows to choose failing or successful transactions based
-	// on their VM state.
+	// ExecutionFilter is a wrapper structure used for transaction and persisting
+	// scripts execution events. It allows to choose failing or successful
+	// transactions and persisting scripts based on their VM state and/or to
+	// choose execution event with the specified container. nil value treated as
+	// missing filter.
 	ExecutionFilter struct {
 		State     *string       `json:"state,omitempty"`
 		Container *util.Uint256 `json:"container,omitempty"`