FAQs Solutions-How do I contact Defi Support for email problems+1.626∝703∝5448 (US) OR +44【744║141║3738】(UK) Transactions on DeFi platforms require gas fees (transaction fees), which are usually paid in ETH for Ethereum-based apps. When interacting with DeFi protocols, you will need to pay these fees to the network to execute transactions (e.g., transferring tokens, lending, borrowing).