Handshake(payload: T, primaryIdentity: AnonymousParty, secondaryIdentity: AnonymousParty)
This object is serialised to the network and is the first flow message the seller sends to the buyer.
primaryIdentity
- the (anonymised) identity of the participant that initiates communication/handshake.
secondaryIdentity
- the (anonymised) identity of the participant that is recipient of initial communication.