One critical benefit DeltaRelay provides is non-custodial:
Unlike centralized exchanges, we never hold onto your Ether or other tokens.
Your tokens will never leave your digital wallet.
What is WETH for?
In order to safely trade ETH for ERC20 tokens in a decentralized environment without a third party holding your ETH, users need to first "wrap" ETH into an ERC20 standard - DeltaRelay uses the 0x protocol which utilizes WETH. This prevents the need to ever deposit ETH into the exchange.
WETH stays in your wallet and can be converted back and forth between ETH and WETH at anytime.
What are the costs?
The only costs are the small gas fees for operating on the Ethereum network. ETH and WETH are always exchanged at a 1:1 ratio (you do not need to worry about price fluctuations). We do not recommend you to wrap and unwrap small amounts of ETH back and forth, since gas fee is charged on a per transaction basis.
You can learn more about WETH here: Read more: https://weth.io/