[Core Protocol] Retrieving Tokens from L1StandardBridge After Failed Bridging

[ed-iv]

Did you check the documentation?

• Yes

Did you read the specs?

• Yes
• No

Did you check for duplicate questions?

• Yes

Issue Description

Suppose an attempt to bridge an ERC20 succeeds on L1 but fails on L2. Funds have been successfully transferred to the L1StandardBridge and it is unclear how they can be retrieved from the docs.

The StandardBridge contract has some comments saying that in this case funds will be transferred back to the sender, but not clear how that works: https://github.com/ethereum-optimism/optimism/blob/65ec61dde94ffa93342728d324fecf474d228e1f/packages/contracts-bedrock/contracts/universal/StandardBridge.sol#L218-L247

Is it possible to withdraw these stuck funds? Alternatively, if these are transferred automatically back to the sender at some point, what mechanism is responsible for that?

Additional Information

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[sbvegan]

Hey @ed-iv, sorry for the delayed response. This is a very good question and I'm not sure of the answer. Please let me ask around and see if I can find someone to answer this.

[sbvegan]

Hey @ed-iv, I spoke to a smart contract engineer and found out that this is an outdated note. I've opened a PR to remove it from the contract source code. If a token is bridged with no corresponding token contract on the other side, the deposit will get stuck.

[ed-iv]

Got it, thanks for the clarification!

[kayabossq]

hello @sbvegan im the user of stuck deposit ole , so how to get it back , because i check any address have a finalize withdrawal on this contract : 0x697402166Fbf2F22E970df8a6486Ef171dbfc524

thats a tx have been withdrawal ,

1. https://etherscan.io/tx/0x443a2d50f913d38912559f9314eb5a00e6c6e1a8746379f891d0b6fca53c3c0e
2. https://etherscan.io/tx/0x5561ee3a4c153ec4e9e147cd9de968828c12091f43b1dee8398a7c4a956fa43b

im input on _localToken (address) is smart contract for ETH chain of OLE token
on _remoteToken (address) , i put BSC smart contract , I should have loaded the blast smart contract,

the problem is where the token arrived , if i used another bridge they create a new token contracr on L2 , so i can bring back to Layer 1 ,

any suggestions???

[sbvegan]

Hey @kayabossq, unfortunately if you've bridged to a non-existent or the wrong contract, the tokens will be stuck. If you're bridging the tokens, its highly recommended to using a bridge UI and to not interact directly with the contracts on a blockchain explorer. I'm sorry for your loss of tokens.

[Reedlzw]

I also encountered the same problem.
This is really bad. If a cross-chain transaction fails on the target chain, restrictions should be set on the source chain, or some fallback method should be prepared.
Or the target chain should mint a peged token similar to bridge.dai to avoid faild on L2
Can we think of a solution together?
I think it's a bit hard to accept that there is no solution.

[kayabossq]

Hello soyboy I made a question about finalize bridge withdrawal tx. How they can , ? Tx on github, the problem if i used another bridge like wormhole they can create another smartcontract so i can bridge back to L1 , how i can push this problem , team , blast is ask me to the optimism, bcs they created the contract , Br dika

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On Tue, 4 Jun 2024 at 20.58 soyboy ***@***.***> wrote: Hey @kayabossq <https://github.com/kayabossq>, unfortunately if you've bridged to a non-existent or the wrong contract, the tokens will be stuck. If you're bridging the tokens, its highly recommended to using a bridge UI and to not interact directly with the contracts on a blockchain explorer. I'm sorry for your loss of tokens. — Reply to this email directly, view it on GitHub <#338 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AIT3GDNIPJXJ6ONBJEI6LLDZFXBZFAVCNFSM6AAAAABFXUPR5WVHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM4TMNRVGM2TS> . You are receiving this because you were mentioned.Message ID: ***@***.*** .com>