Is it clear that for every "ether" transfer using "address.transfer(amount)" how much "fee" must be paid? I mean how much is the cost of transferring
address.transfer(amount)? Is it a fix value for this transaction fee? And is
fee difference with the
gas price of a transaction ? Here is mentioned that
"Only a small amount of gas is sent along (21000 gas)."
Does it mean the transaction
21000 wei ?