When a transaction is made, The node's owner 'll be paid in BLOCK.
if the fees 're in BTC or SYS is does mean that its 'll be exchanged automatically in BLOCK to be able to pay the node's owner?
For the current release, we've moved the standalone XBridge app's functionality into the Blocknet wallet.
As a result, for the moment, trade fees are charged directly in BLOCK with no conversion, which is nice and simple.
If you're starting out for the first time and need some BLOCK to pay trade fees, you simply trade whatever you have for a tiny bit of BLOCK and move on. Trade fees are paid by liquidity-takers, so if you add liquidity, you don't need BLOCK beforehand to make that initial trade.
This is temporary. Future releases will streamline this and enhance it.