how to earn a transaction fee for transactions originating from my client I am working on an online litecoin wallet system. For every transaction originated from our site, we need to charge say x% of the amount as fees and it'll be sent to Admin's address ? How can I do that ?

I guess paytxfee is what we are willing to pay others for a particular transaction, right ?

I didn't found any parameter to set the address to which the transaction fees should go ?

Looking for some help...
By definition, "transaction fee" is the difference between sum of inputs and sum of outputs. It always goes to the miner.

What you need is to add an output payable to your account.