settlement

type Interface interface {
	// Pay initiates a payment to the given peer
	// It should return without error it is likely that the payment worked
	Pay(ctx context.Context, peer swarm.Address, amount uint64) error
	// TotalSent returns the total amount sent to a peer
	TotalSent(peer swarm.Address) (totalSent uint64, err error)
	// TotalReceived returns the total amount received from a peer
	TotalReceived(peer swarm.Address) (totalSent uint64, err error)
	// SettlementsSent returns sent settlements for each individual known peer
	SettlementsSent() (map[string]uint64, error)
	// SettlementsReceived returns received settlements for each individual known peer
	SettlementsReceived() (map[string]uint64, error)
	// SetPaymentObserver sets the PaymentObserver to notify
	SetPaymentObserver(observer PaymentObserver)
}

type PaymentObserver interface {
	// NotifyPayment is called when a payment from peer was successfully received
	NotifyPayment(peer swarm.Address, amount uint64) error
}