are there any production SuperchainErc20 tokens out there?

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yeah! every recent Clanker and bankr token

lore @optimism | ex: @coinbase | views are my own | what if it all worked out? 

are there any fees for destination chain, or no, because it's an op-stack system contract/part of the "tick"? (what are the technical terms here?)

There's no fee, just pay gas on source (burn) and destination chain (mint) to execute a cross-chain transfer

There's no fee, just pay gas on source (burn) and destination chain (mint) to execute a cross-chain transfer

https://docs.optimism.io/stack/interop/superchain-erc20#how-it-works

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that’s what i figured - but is that bc it’s part of the syscalls (is that what y’all call them?) included in each block? docs don’t seem to go into it

i guess i'm asking: is the destination chain tx gas-free because it's invoked by the SystemAddress or similar? eg how setL1blockValues is called per-block but incurs no fee and is called by the SystemAddress

https://optimistic.etherscan.io/tx/0xb8e218a268af34c3cc4fd126e08212f3e1f8d0f7a14ff7ddbf075addfd3f798f

two follow-up q's: 

inclusion is guaranteed at the protocol-level then and wouldn't be subject to DoS gas inflation attacks to delay the tx landing, right?

what's the gas limit on the mint tx? since it's BYOC, i assume it can vary widely (including malicious implementations) - is gas limit 1m like the L1 block values call?

I'm not sure I'm following your question - the reason there's no fee is because the token is burned and minted. There's no liquidity pools. 

Its just 2 normal txs (1 on source and 1 on destination)