Another core functionality of the Safe is token payment. Generally, Ethereum transactions require ETH for paying transaction fees (“gas”). With the Safe, users can pay transaction fees in a number of supported ERC20 tokens. This is realized via a transaction relay service that accepts those tokens and submits the transactions to the blockchain, therefore paying the gas fee in ETH. With the same functionality, Ether-less transactions can be implemented, where a 3rd party pays transaction fees on behalf of a Gnosis Safe via the same relay service.