I´m looking for a full code example of a Meta-transaction using the Relayer and the web browser. The meta-transaction example should be signed on the front-end with Metamask with eip712. I have checked https://github.com/spalladino/workshop-defender-meta-txs And this example does not have the front-end code.
Can you recommend me an example or a library? so I can join both parts web/backend. As GSN examples.