Peer

Purpose

A node on the mix network, named by the address the wire reaches it at — a tumbler that mixes cells, or an edge a recipient collects from. The transport layer routes cells between peers; what a peer is on the floor (a libp2p multiaddress, a host and port) is the bound wire's concern, so the mix layer holds only the opaque address it hands to the wire.

Attributes

• address: is Text that names where the wire reaches the peer, such as "peer-3"

Invariants

• The address is not empty.

Scenarios

A peer is its address

Given: the address "peer-3" When: a Peer is created Then: it is accepted and reads back with address "peer-3"

A peer without an address is rejected

Given: an empty address When: a Peer is created Then: the creation is rejected because the address is empty