The present invention relates to pH-sensitive mucoadhesive film-forming gels and wax-film composites suitable for topical and mucosal delivery of molecules of interest, namely active pharmaceuticals. The method is performed at a social networking system and includes receiving, from a first client device, a request to establish a prepayment account at the social networking system. The wringing device includes a nip shaft coupled to the carriage, and a movable nip shaft movably coupled to the carriage proximate to the nip shaft. A second determination is performed as to whether the destination processor is within a same supernode as the source processor based on the address information if the destination processor is not within the same processor book.