improve: simulate relay gas fees for messages

[james-a-morris]

We will require the following PR to be merged first: across-protocol/sdk#427

Fixes ACX-1529, ACX-1575, and ACX-1574

[linear]

ACX-1571 Estimate fill gas costs with non-empty message fields

For most cases, use the main RL relayer (0x428…) as the simulated EOA

This only applies to situations where the message ≠ 0x and recipient is a contract

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
frontend-v2	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 25, 2023 10:30pm
goerli-frontend-v2	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 25, 2023 10:30pm

[linear]

ACX-1529 Avoid await on non-async functions.

ACX-1575 Allow caller to pass optional custom EOA param

extra query parameter ?relayer=x that can be used to change the EOA we use for simulations.

Note, this might produce situations where the caller gets a fee quote successfully but our relayers are not able to fill it. This should only be used if the caller knows that the relayer they pass in will fill their deposit

ACX-1574 Return 4xx error if simulation reverts because of insufficient token balance or insufficient gas funds

This is important because we will never slow fill a deposit with a message, so we shouldn't be quoting these deposits.

[mrice32]

Looks good, just a few comments!

[nicholaspai]

Nice, just some nits

[nicholaspai]

One question https://github.com/across-protocol/frontend-v2/pull/862/files#r1372068764

[james-a-morris]

@nicholaspai rerequested due to needing a UI change to accommodate the new request.

[nicholaspai]

LGTM but do we need to make changes to the relayer or let other callers of the API know before we merge and deploy?