[NET-674] [Alert odMjbK] ink-sepolia_Writer_Short_Stall

[elina-chertova]

Automated fix proposal for alert odMjbK.

• Alert: ink-sepolia_Writer_Short_Stall
• Base branch: open-beta
• Investigation: /root/alert/incident-agent/agent-system/data/investigations/odMjbK
• Report: /root/alert/incident-agent/agent-system/data/investigations/odMjbK/report.html

Reviewer quick view

• Scope: 1 file(s) in evm
• Root cause (agent): not explicitly captured
• Summary: ✗ Read k8s.logs__74ecc9a49ebab5cd.raw.json
  │ data/investigations/odMjbK/tool_cache/k8s.logs__74ecc9a49ebab5cd.raw.json
  └ Path does not exist

● Read copilot_implementer.md
│ data/investigations/odMjbK/terminal_debate/odMjbK__terminal_debate__20260522
│ _113136/copilot_implementer.md
└ 156 lines read

● Read rpc-data.ts
│ data/investigations/odMjbK/github_files/subsquid_squid-sdk/open-beta/evm/evm
│ -rpc/src/rpc-data.ts
└ L215:260 (46 lines read)

● List tool cache files (shell)
│ ls /root/alert/incident-agent/agent-system/data/investigations/odMjbK/tool_c
│ ache/ 2>/dev/null | head -20
└ 1 line...

● Check proposed fix exists and nonce line (shell)
│ find
│ /root/alert/incident-agent/agent-system/data/investigations/odMjbK/fixes
│ -type f 2>/dev/null && grep -n "nonce" /root/alert/incident-agent/agent-syst
│ em/data/investigations/odMjbK/fixes/proposed/evm/evm-rpc/src/rpc-data.ts
│ 2>/dev/null | grep "221|option.*nonce|nonce.*option"
└ 6 lines...

● The proposed fix file is confirmed: line 221 now reads nonce: option(SMALL_QTY). Now I'll write
the final response.

● Write FINAL_RESPONSE.md (shell)
│ cat > /root/alert/incident-agent/agent-system/data/investigations/odMjbK/t
│ erminal_debate/odMjbK__terminal_debate__20260522_113136/FINAL_RESPONSE.md
│ << 'FINAL_EOF'
│ # FINAL RESPONSE — ink-sepolia_Writer_Short_Stall (odMjbK)…
└ 188 lines...

● Summary

Verdict: accept — root cause confirmed, one-line code fix staged.

Root cause chain [evidence]:

1. Block 50,231,612 on ink-sepolia contains an OP Stack deposit tx (type 0x7e) with nonce:
   undefined
2. Transaction schema in evm/evm-rpc/src/rpc-data.ts:221 requires nonce: SMALL_QTY (non-optional)
   → DataValidationError crash
3. dump-ink-sepolia-0 enters CrashLoopBackOff (127 restarts) → no S3 output → write container
   loops → sqd_last_block_total frozen at 50,231,611

Fix (one line) — fixes/proposed/evm/evm-rpc/src/rpc-data.ts is staged:

• nonce: SMALL_QTY,

• nonce: option(SMALL_QTY),

Identical pattern to PR #482 (EdvwWb). sourceHash/mint in the same object are already option().

Operator actions required: build new evm-dump image → update infra chart tag → ArgoCD sync →
verify sqd_last_block_total advances past 50,231,611.

Fix metadata

• Fix class: rca_fix
• Confidence: high
• Evidence basis: logs, metrics, code
• Falsification: If block 50,231,612's type 0x7e tx actually contained a nonce field,
• Follow-up: Verify sqd_last_block_total advances past 50,231,611 after deploy.
  (Generated by the terminal-debate agent — values reflect the agent's self-assessment, not a verified verdict. Use them as a starting point for review.)

Summary

✗ Read k8s.logs__74ecc9a49ebab5cd.raw.json
│ data/investigations/odMjbK/tool_cache/k8s.logs__74ecc9a49ebab5cd.raw.json
└ Path does not exist

● Read copilot_implementer.md
│ data/investigations/odMjbK/terminal_debate/odMjbK__terminal_debate__20260522
│ _113136/copilot_implementer.md
└ 156 lines read

● Read rpc-data.ts
│ data/investigations/odMjbK/github_files/subsquid_squid-sdk/open-beta/evm/evm
│ -rpc/src/rpc-data.ts
└ L215:260 (46 lines read)

● List tool cache files (shell)
│ ls /root/alert/incident-agent/agent-system/data/investigations/odMjbK/tool_c
│ ache/ 2>/dev/null | head -20
└ 1 line...

● Check proposed fix exists and nonce line (shell)
│ find
│ /root/alert/incident-agent/agent-system/data/investigations/odMjbK/fixes
│ -type f 2>/dev/null && grep -n "nonce" /root/alert/incident-agent/agent-syst
│ em/data/investigations/odMjbK/fixes/proposed/evm/evm-rpc/src/rpc-data.ts
│ 2>/dev/null | grep "221|option.*nonce|nonce.*option"
└ 6 lines...

● The proposed fix file is confirmed: line 221 now reads nonce: option(SMALL_QTY). Now I'll write
the final response.

● Write FINAL_RESPONSE.md (shell)
│ cat > /root/alert/incident-agent/agent-system/data/investigations/odMjbK/t
│ erminal_debate/odMjbK__terminal_debate__20260522_113136/FINAL_RESPONSE.md
│ << 'FINAL_EOF'
│ # FINAL RESPONSE — ink-sepolia_Writer_Short_Stall (odMjbK)…
└ 188 lines...

● Summary

Verdict: accept — root cause confirmed, one-line code fix staged.

Root cause chain [evidence]:

1. Block 50,231,612 on ink-sepolia contains an OP Stack deposit tx (type 0x7e) with nonce:
   undefined
2. Transaction schema in evm/evm-rpc/src/rpc-data.ts:221 requires nonce: SMALL_QTY (non-optional)
   → DataValidationError crash
3. dump-ink-sepolia-0 enters CrashLoopBackOff (127 restarts) → no S3 output → write container
   loops → sqd_last_block_total frozen at 50,231,611

Fix (one line) — fixes/proposed/evm/evm-rpc/src/rpc-data.ts is staged:

• nonce: SMALL_QTY,

• nonce: option(SMALL_QTY),

Identical pattern to PR #482 (EdvwWb). sourceHash/mint in the same object are already option().

Operator actions required: build new evm-dump image → update infra chart tag → ArgoCD sync →
verify sqd_last_block_total advances past 50,231,611.

Risk & rollout

• Suggested rollout: canary / one-network-first, then broader rollout after signal is stable.
• Rollback: revert this PR (or restore previous config values/files) if the incident signal worsens.

Reproduction status

Incident behavior was reproduced or corroborated strongly enough for a non-hypothesis fix proposal.

Validation checklist

• Verify the original incident signal improves (logs/metrics/alerts) after deploy.
• Verify no regression on sibling networks/providers/services touched by this change.
• Confirm queue / delivery pipeline status returns to expected steady state.

Changed files

• evm/evm-rpc/src/rpc-data.ts

Notify

cc @tmcgroul (automation opened this PR.)