# Lightning?full node question

I'm running a full node as well as a Lightning Node with 4 channels open. I also have incoming ports enabled. I've noticed that my balance varies daily by a few thousand Sats. I'm new to running a node so wondered if someone could explain why this happens (or maybe link me to an article explaining).

Many thanks...

If it is only the balance of your channels that is changing I would assume that your node is routing payments. The lightning network is all about forwarding payments.

So the following explains what could have happened assuming you have two channels to a node A and a node B:

(A)--20sat------40sat--(you)--30sat------50sat--(B)

meaning:

• node A has 20 satoshi
• your node has 40 satoshi + 30 satoshi = 70 Satoshi
• node B has 50 satoshi

Let us assume B wants to pay 15 satoshi to A this does work via lightning and via your node. The channels will update their balance:

(A)--35sat------25sat--(you)--45sat------35sat--(B)

meaning:

1. node A has 35 satoshi
2. List item
3. your node has 25 satoshi + 45 satoshi = 70 Satoshi
4. node B has 35 satoshi

Probably your node even takes some routing fee which could have a standard value of at least one satoshi in that case your final balance would look like this

(A)--35sat------25sat--(you)--46sat------34sat--(B)

meaning:

• node A has 35 satoshi
• your node has 25 satoshi + 46 satoshi = 71 Satoshi
• node B has 34 satoshi