End to end Multichain Faucet Implementation

[tarunkhasnavis]

This is a continuation of the efforts started here: #509

We need to provide a claim flow that allows users to claim to multiple chains, specifycing amounts for each chain. This will change the way the faucet works at all levels (contract, backend service, and front-end experience). It will make claiming 1 smooth step and will take the cost of bridging away from the user.

[tarunkhasnavis]

In order to avoid making contract changes we must first test out the behavior of Safe.call with an encoded multicall function. In the scenario where the config.amount exceeds or below we expect the txn to revert. If this works, we may need to have the designs reflect this by making sure the total amount the user claims equals 1.0 or 0.1 ETH exactly. @mayanksayshi

Created eng tracking here: #575

[tarunkhasnavis]

Was able to get a working multicall claim without making contract changes and tested the 3 scenarios:

• The aggregate amount in the multicall > allowed amount (1.0 ETH for onchain auth)
  • This transaction reverts
  • Example txn
• The aggregate amount in the multicall < allowed amount
  • This transaction also reverts
  • Example txn
• The aggregate amount in the multicall = allowed amount
  • This transaction is successful
  • Example txn

We can exclude contract changes but need to make sure two things are scoped into the design and eng:

1. Ensure a strict requirement that the amount total from the multicall data equals exactly the value (config.amount)
2. Right now the UI says its successful after the initial transfer to the multicall contract and doesn't catch that the txn reverts later. Need to modify the transaction check on the UI to reflect the accurate status. Maybe use waitForTransactionReciept

We should now be able to complete eng scoping and iterate towards a final design with @mayanksayshi

cc @fainashalts @tremarkley @jvmi7

[mayanksayshi]

@tarunkhasnavis here is the Figma link https://www.figma.com/design/rBlLeciYg1jJBUDYmtjzr0/Faucet-with-Multichain-Support?node-id=4473-5293&t=UDTJ2tF31SqYZbms-1