Create a proxy on signup for formatting metatxs

[ana0]

Pros and cons?

Con of the current approach is we need to whitelist relayers/have special methods on all contracts for the relayer.

Adding a proxy would allow the main hub and token to not know about the relayer, and add a nice path for upgradability with further user features, like social recovery.

[d-xo]

pros:

• Core doesn't need to know about relayers
• If the relayers go bad / go down, then the contracts are still usable

cons

• Slightly higher gas cost
• Might make end user auditing / verification harder (due to additional layer of indirection)

[ana0]

Closing because the new MVP plan uses gnosis safe for this functionality