feat: add custom gas token migration #313
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Signed-off-by: Joxes <[email protected]>
Signed-off-by: Joxes <[email protected]>
tynes
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Aug 13, 2025
This is WIP so far but meant to show how it can work. The big todo is to rename the feature flag with the name of the hardfork that the CGT upgrade is included in. This does leak knowledge of CGT into the client software so that it can optionally deploy the CGT predeploys. It is expected that the CGT predeploys will be in the genesis if the hardfork is active at genesis only on CGT chains. Relevant links: - ethereum-optimism/design-docs#305 - ethereum-optimism/design-docs#313 - defi-wonderland#478
alcueca
reviewed
Aug 16, 2025
| - In `L2ToL1MessagePasser`: | ||
| - Import `isCustomGasToken` to block `msg.value` > 0 during withdrawals, to block native asset sends. | ||
| - `FeeVaults`: | ||
| - Upgraded to allow withdrawals into an L2 address and turn off L1 withdrawals. |
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Description
This document proposes a migration solution for OP Stack chains that use the old implementation to the new one proposed in #305.