(SDK) Relayer paradigms

[benjaminbollen]

• msg.sender
• SAFE execute SafeTx with relayer
  • Gelato as a provider, ERC2771 as a new standard for metatransactions
• UserOperations with account abstraction ERC4337
• pre- and post-hooks with intent solvers

[benjaminbollen]

intermediary notes:

• SAFE has an ERC-4337 module: https://github.com/safe-global/safe-modules/tree/main/modules/4337
• while ERC-4337 is not the completion of account abstraction, it can help us harmonize SAFE avatars, and EOA avatars under a single paradigm and architecture; moving away from the fragile relayer architectures (which we can still consider as a pathway, but they have an inherent single point of failure)
• hooks on intents and UserOperations are strongly aligned. In any case, the work ERC4337 does on handling payments and simulation correctly can be studied for hooks. Hopefully these two paradigms can be brought even stronger together