IsAppInjectedMsg returns true if the given msg is an "app-injected msg".

IsDisallowExternalSubmitMsg returns true if the msg is not allowed to be submitted externally.

IsDydxMsg returns true if the given msg is a dYdX custom msg.

IsInternalMsg returns true if the given msg is an internal message.

IsNestedMsg returns true if the given msg is a nested msg.

IsSingleAppInjectedMsg returns true if the given list of msgs contains an "app-injected msg" and it's the only msg in the list.

IsUnsupportedMsg returns true if the msg is unsupported by the app.

ValidateNestedMsg returns err if the given msg is an invalid nested msg.