](./develop.diagram.25.png) <em>A MagnetoCorp and DigiBank
applications (issue and buy) delegate their respective network interactions to
their gateways. Each gateway understands the network channel topology comprising
the multiple peers and orderers of two organizations MagnetoCorp and DigiBank,
leaving applications to focus on business logic. Peers can talk to each other
both within and across organizations using the gossip protocol.</em></p>
<p>A gateway can be used by an application in two different way