Critical fixes applied to resolve 94.4% error rate from RPC rate limiting:
**Configuration Fixes:**
- .env.production: Set Chainstack WSS as primary endpoint
- config/providers_runtime.yaml: Prioritized Chainstack with 100 RPS limits
- config/arbitrum_production.yaml: Increased rate limits from 20 to 100 RPS
**Code Fixes:**
- pkg/scanner/market/scanner.go: Use shared RPC client from contractExecutor
instead of creating new clients for every pool fetch (critical fix)
**Results:**
- Blocks processing continuously without interruption
- DEX transactions being detected and analyzed
- 429 errors reduced from 21,590 (94.4%) to minimal occurrences
- System health restored to production readiness
**Root Cause:**
Scanner was creating new RPC clients for every concurrent pool fetch,
bypassing rate limiting and causing excessive requests to RPC endpoint.
Each goroutine's client made independent requests without coordination.
**Technical Details:**
- Shared client respects global rate limits
- Prevents connection pool exhaustion
- Reduces overhead from repeated connection setup
- Ensures all RPC calls go through rate-limited provider manager
Resolves: LOG_ANALYSIS_20251029.md findings
Impact: Critical - enables continuous block processing
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
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