}
	hc.cipher = hc.nextCipher
	hc.mac = hc.nextMac
	hc.nextCipher = nil
	hc.nextMac = nil
	for i := range hc.seq {
		hc.seq[i] = 0
	}
	return nil
}

func (hc *halfConn) setTrafficSecret(suite *cipherSuiteTLS13, level QUICEncryptionLevel, secret []byte) {
	hc.trafficSecret = secret
	hc.level = level
	key, iv := suite.trafficKey(secret)
	hc.cipher = suite.aead(key, iv)
	for i := range hc.seq {