Handshake
data class Handshake<out T>(val payload: T, val primaryIdentity: <Error class: unknown class>, val secondaryIdentity: <Error class: unknown class>)
This object is serialised to the network and is the first flow message the seller sends to the buyer.
Parameters
primary Identity
the (anonymised) identity of the participant that initiates communication/handshake.
secondary Identity
the (anonymised) identity of the participant that is recipient of initial communication.