CalculateReceiverSession calculates the key agreement for a sender.

CalculateSenderSession calculates the key agreement for a recipient.

CalculateSymmetricSession calculates the key agreement between two users.

NewEmptyReceiverParameters creates an empty structure with the receiver parameters needed to create a session.

NewEmptySenderParameters creates an empty structure with the sender parameters needed to create a session.

NewReceiverParameters creates a structure with all the keys needed to construct a new session when we are receiving a message from a user for the first time.

NewSenderParameters creates a structure with all the keys needed to construct a new session when we are sending a message to a recipient for the first time.

ReceiverParameters describes the session parameters if we are receiving a message from someone for the first time.

SenderParameters describes the session parameters if we are sending the recipient a message for the first time.

SymmetricParameters describes the session parameters for sessions where both users are online, which doesn't use prekeys for setup.