[Application Development] "One click" bridging of USDC

[beskay]

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Issue Description

I want to develop a crosschain app that is deployed on several OP Stack chains. For the app to work, I need to be able to transfer USDC between different Superchains with a single function call.

Is this possible? If yes, how?

My initial idea was using the L2StandardBridge, however that contract is made for L1<>L2 transfers, not for L2<>L2 transfers.

Using the Superchain bridge is not an option, since there are several transactions needed to complete the transfer (initiate bridge transfer on source chain, finalize transfer on target chain).

Message passing works perfectly as explained in the documentation btw, so I thought that ERC20 bridging would be just as simple, since an ERC20 transfer is basically just updating some state variables.

However, I think my only option is using third party protocols like Across, correct?

Hopefully someone can help me! Thanks!

Steps to Reproduce

Not an error or bug report.

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• Viem
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[joohhnnn]

TBH, even if you’re using third-party protocols like CBridge, Stargate, or others, there are still multiple transactions that need to be triggered. The difference is they have their own broker, so the user doesn’t need to manually release tokens on the destination chain.

Have you checked this interop spec? Once interop is fully implemented, it could make your cross-chain flow feel much more native.

[beskay]

Yes I did, unfortunately USDC is not (yet) a SuperchainERC20. Their contract is upgradeable, so maybe in the future though.