Studying how atomic swap works on AtomixDEX I found that in order to complete a transaction to receive BTC, I only need to present the key from which the hash was made.
That is, the key is sent to the mempool, the miners catch it and complete the transaction, receiving a commission from the transaction.
I can complete the transaction without having BTC in my wallet.
This is how the HTLC transaction works in Bitcoin.
When I buy ETH via atomic swap, however, AtomixDEX requires that I have ETH in my wallet in advance so that I can pay for the gas when I call the contract. They use a regular solidity contract in ETH to implement the HTLC idea, and it requires the recipient of the transfer to pay for the gas to invoke it.
Does etherium have an analog to the HTLC transaction in bitcoin?
To be able to accept an HTLC transaction without having any ETH on the wallet at all.
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