Did you check the documentation?

• Yes
• No

Documentation Feedback (Optional)

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What type of issue are you experiencing?

• Error
• Feature Request
• General Question

Issue Description

Calls to theL2_TO_L2_CROSS_DOMAIN_MESSENGER contract on OP Sepolia fail with errorProxy: implementation not initialized.

See:https://sepolia-optimism.etherscan.io/tx/0xfeff7e0dc129f0dd4dc3070a724b6840a823a1e27ac7a55c548b8e98f93a50d0

Steps to Reproduce

Follow along theinterop message passing tutorial.

DeployGreetingSender.sol on OP-Sepolia,Greeter on any other Superchain. CallGreetingSender.setGreeting on OP Sepolia.

Alternatively use this already deployed contract to callsetGreeting:
https://sepolia-optimism.etherscan.io/address/0xa0b686d3f661ccf8420f29942ce0334502148f77#writeContract

The corresponding receiver contract is implementedhere on Base-Sepolia.

Are you using a specific library or SDK?

• OP-SDK
• Viem
• Other
• Not Sure

Are you using the latest version of the library/SDK?

• Yes
• No

Environment Details

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Troubleshooting Attempts

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What type of support do you need?

• Technical support for issue resolution
• Feature implementation guidance
• General advice or consultation
• Documentation or learning resources

Additional Information

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