package udp

import (
	"context"
	"time"
)

type Congestion interface {
	Sequence(ctx context.Context) (uint32, error)
	NextAck() uint32
	NextNack() uint32

	ReceivedPacket(seq, nack, ack uint32)

	AwaitEarlyUpdate(ctx context.Context, keepalive time.Duration) (uint32, error)
}