Debug RPC Provider

Diagnose RPC provider health issues for a Hyperlane chain and recommend fixes.

When to Use

1. Alert-triggered: RPC error rate alerts, provider timeout alerts, stale block alerts
2. User request: "debug RPC for [chain]", "why are RPCs unhealthy on [chain]"

Input Parameters

/debug-rpc-provider <chain> [environment=mainnet3]

Parameter	Required	Default	Description
chain	Yes	-	Chain name (e.g., ethereum)
environment	No	mainnet3	mainnet3 or testnet4

Workflow

Step 1: Find Monorepo Root

MONOREPO_ROOT=$(git rev-parse --show-toplevel)

Step 2: Run Debug Script

pnpm --dir "$MONOREPO_ROOT/typescript/infra" exec tsx scripts/secret-rpc-urls/debug-rpc-url-health.ts \
  -e <environment> -c <chain>

Step 3: Analyze Results

Examine the output table and classify each RPC URL:

Condition	Classification
Health = ✅, Latency < 500ms	Healthy
Health = ✅, Latency >= 500ms	Slow
Health = ⚠️	Stale (block age 30-120s)
Health = ❌, has error	Dead
Health = ❌, chainId mismatch	Misconfigured

Step 4: Output Diagnosis and Recommendation

Output the following structured information:

1. Summary: One-line description of the issue (e.g., "2 of 3 private RPCs are dead on ethereum")

2. Current URL status table: For each private RPC URL, show status (healthy/slow/stale/dead) and key metrics

3. Proposed new URL list: A concrete JSON array of the recommended new private RPC URLs. This should:

   • Remove dead/misconfigured URLs
   • Keep healthy URLs (reorder so healthiest are first)
   • Always backfill with healthy registry URLs to replace removed URLs and maintain at least the original URL count. Registry URLs are free and add redundancy.
   • Never leave the list empty

   Format:

   Proposed new RPC URLs for <chain> (<environment>):
   ["https://full-url-1", "https://full-url-2"]
   

4. Suggested action: Either:

   • "No action needed" if all private RPCs are healthy
   • "Run /fix-rpc-urls to apply the proposed URL changes" if URLs need updating
   • "Investigate further" if the issue is unclear (e.g., all RPCs stale may indicate chain halt)

Step 5: Offer to Fix (Confirmation Gate)

If you recommended URL changes in Step 4, end your response with the confirmation convention so the user gets an approve/reject button:

[CONFIRM: Fix RPC URLs for <chain>]

This MUST be the very last thing in your message. Do NOT run /fix-rpc-urls yourself — wait for user approval.

Note: [CONFIRM: ...] is a Haggis-specific harness primitive — Haggis renders it as an inline approve/reject button. In other Claude Code contexts it is just text, so this skill is intended to be invoked from Haggis.

If all URLs are healthy and no changes are needed, skip this step.

Important Notes

• Registry URLs are public and don't contain secrets.
• If ALL RPCs (private + registry) are stale/dead, the chain itself may be halted — check block explorers before recommending URL changes.