After #395 lodestar seems unavailable.

[yoshidan]

The following error was observed at 7bef190.

Error

Wait for L1 to start up - can take up to 2 minutes
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2025/09/26 10:07:54 Error: error deploying environment: error deploying kurtosis package: execution error: An error occurred executing instruction (number 41) at github.com/ethpandaops/optimism-package/src/wait/wait_for_sync.star[28:16]:
run_sh(name="wait-for-l1-consensus-startup", run="while true; do sleep 5; echo 'L1 Chain is starting up'; SLOT=$(curl -fs $CL_RPC_URL/eth/v1/beacon/headers/ | jq -r '.data[0].header.message.slot // \"0\"'); if [ \"$SLOT\" -gt 0 ]; then echo 'L1 Chain has started!'; break; fi; done", image="mslipper/deployment-utils@sha256:4506b112e4261014329152b161997129e7ca577f39c85e59cfdfdcb47ab7b5cf", env_vars={"CL_RPC_URL": "http://{{kurtosis:aac2023c65cd410ab4a0432ad1e3dcf0:ip_address.runtime_value}}:4000", "L1_BLOCK_TIME": "6", "L1_CHAIN_ID": "3151908", "L1_RPC_KIND": "standard", "L1_RPC_URL": "http://{{kurtosis:9968ebd600644983b524719413084258:ip_address.runtime_value}}:8545", "L1_WS_URL": "ws://{{kurtosis:9968ebd600644983b524719413084258:ip_address.runtime_value}}:8546", "WEB3_RPC_URL": "http://{{kurtosis:9968ebd600644983b524719413084258:ip_address.runtime_value}}:8545"}, wait="300s", description="Wait for L1 to start up - can take up to 2 minutes")
 --- at /home/circleci/project/core/server/api_container/server/startosis_engine/startosis_executor.go:164 (sendErrorAndFail) ---
Caused by: error occurred while executing one time task command: while true; do sleep 5; echo 'L1 Chain is starting up'; SLOT=$(curl -fs $CL_RPC_URL/eth/v1/beacon/headers/ | jq -r '.data[0].header.message.slot // "0"'); if [ "$SLOT" -gt 0 ]; then echo 'L1 Chain has started!'; break; fi; done 
 --- at /home/circleci/project/core/server/api_container/server/startosis_engine/kurtosis_instruction/tasks/run_sh.go:352 (RunShCapabilities.Execute) ---
Caused by: The exec request timed out after 300 seconds
 --- at /home/circleci/project/core/server/api_container/server/startosis_engine/kurtosis_instruction/tasks/tasks_shared.go:239 (executeWithWait) ---
exit status 1

Environment

• EL = ethpandaops/geth:master-6492751
• CL = ethpandaops/lodestar:fusaka-devnet-5-5e2a800

Root Cause

Lodestar raises bad request for eth/v1/beacon/headers/. Correct endpoint is eth/v1/beacon/headers.

curl localhost:59151/eth/v1/beacon/headers

{"data":[{"root":"0xe8a7c9157fa6fcd8f005cc12aee6bef61f08f3daf352d2dd8888504eb9ca686f","canonical":true,"header":{"message":{"slot":"97","proposer_index":"52","parent_root":"0x6df41108cac6767914ad16ed392bfead22bac14ff8127be5736f1d2333b3d520","state_root":"0x349a500fed0f6b2b695a830e902896e8a93b778b8ecf702d867604359786853f","body_root":"0x83a4ceacde6ccf4aeb2a4af9231ccc538bc3fb71272c7b51386d35895ae410c2"},"signature":"0x8acfa7ccf8a9b19b91966b4a1d91cd4c7bdeac6eb43e207398682f73f205a36f0d5793f3f12a4e6c96c3938c1018ec4b07694c9088902142a5aeb687db52946702c5680c484c0d1f731aff6ccae6da8f90fc5a4724988e89df5bad31e8121072"}}],"execution_optimistic":false,"finalized":false}

curl localhost:59151/eth/v1/beacon/headers/

{"code":400,"message":"Invalid block id ''"}

In previous commits, even bad requests would return a non-zero value and pass through.
However, due to stricter checks introduced in this commit, it now results in an error.

https://github.com/ethpandaops/optimism-package/pull/395/files

Solution

We should consider using curl -fs $CL_RPC_URL/eth/v1/beacon/headers instead of curl -fs $CL_RPC_URL/eth/v1/beacon/headers/
After forking and making the necessary changes, it is now running successfully.
https://github.com/yoshidan/optimism-package/blob/ca2ca4fab42446c1a9ddc596f1b8036db4766194/src/wait/wait_for_sync.star#L33

(I have not been able to confirm this for other CL).