public boolean canSend() {
        return sendCredits.get() > 0 && state == RdmaConnectionState.ESTABLISHED;
    }
    
    public void consumeSendCredit() {
        sendCredits.decrementAndGet();
    }
    
    public void grantSendCredit() {
        sendCredits.incrementAndGet();
    }
    
    public void grantReceiveCredit() {