Node Party Line (NPL)

Node Party Line offers a way for DApp instances (nodes) of a cluster to exchange information among themselves in real time. This is useful in cases where DApp needs to make decisions based on differing information provided by individual nodes.

Examples:

• Exchanging cryptographic signatures from all nodes in order to perform multi-sign operations.

• Nominating a single node (leader-election) from the cluster to communicate with an external service.

• Agreeing upon a piece of information to go forward with based on different information gathered by individual nodes.

NPL messages do not go through consensus which makes them real-time. NPL messages sent by a DApp instance are immediately received by currently-executing DApp instances on other nodes.

Privacy

NPL can work in public or private modes. In public mode, all NPL messages exchanged between UNL nodes are also received by any other connected nodes as well. In private mode, the NPL messages are restricted to UNL nodes only.