[blake-pro]

Summary

• Fetch state-chain witness inputs concurrently across GOAT blocks while preserving block order. Reuse the execution and Cosmos RPC clients within each batch.
• Validate withdrawal receipts before fetching execution witnesses. Retry the batch if inputs are missing or inconsistent, and log the elapsed time for each successful fetch.
• Update Ziren to a4d47079, align the Plonky3 dependencies, refresh the Groth16 verifier test expectations, and update ROOT_COMMIT_PROGRAM_ID.

Configuration and rollout

• Proof Builder accepts [state_chain].fetch_concurrency, which defaults to 16 when omitted. The standalone CLI exposes --fetch-concurrency. Use 1 for sequential fetching.
• The Ziren update changes verifier inputs and the Commit-chain program ID used by Operator and Watchtower circuits. Check whether the new guest bundle can verify the proof artifacts used by the target deployment before rollout