Blockchain Infrastructure Production Status

Last Updated: 2025-12-04 Status: 🟢 Core Infrastructure Operational | 🟡 Bitcoin UTXO Flow In Progress

✅ COMPLETED - Production Ready

1. All Watchers Operational (⁵⁄₅)

Chain	Status	Block Height	Last Update	Deposit Detection	Sweep Integration
ETH	🟢 Running	23,939,375	1s ago	✅ Native + ERC20	✅ Yes
BSC	🟢 Running	70,461,189	2s ago	✅ Native + BEP20	✅ Yes
TON	🟢 Running	54,657,006	1s ago	✅ Native TON	✅ Yes
TRON	🟢 Running	78,061,847	4s ago	✅ Native + TRC20	✅ Yes
BTC	🟢 Running	926,394	Polling (10min)	✅ UTXO-based	✅ Yes

All watchers: - ✅ Using enhanced RPC provider management (health-weighted selection) - ✅ Circuit breaker protection (optimized for fast recovery) - ✅ Cursor-based block tracking with atomic updates - ✅ Deposit detection with database wallet lookup - ✅ RabbitMQ event publishing for bot notifications - ✅ Prometheus metrics instrumentation - ✅ Graceful shutdown with context cancellation

2. getLatestBlock() Functions - All Chains

✅ Production-Ready Implementation: - Caching Strategy: 30s TTL to reduce RPC calls - Thread-Safe: RWMutex locks for concurrent access - Error Handling: Returns errors for graceful degradation - Consistent Pattern: All chains use same approach

Per-Chain Implementation: - ETH/BSC: eth_blockNumber via JSON-RPC - TON: getMasterchainInfo REST API - TRON: getNowBlock HTTP API - BTC: getblockcount Bitcoin RPC

3. Deposit Detection System

✅ All Chains Implemented:

EVM Chains (ETH, BSC)

✅ Native transfers via block scanning
✅ ERC20/BEP20 Transfer event parsing
✅ Database-first lookup (scalable for 10k+ users)
✅ Confirmation threshold before credit
✅ Hot wallet detection (skip internal transfers)
✅ Sweep item auto-creation

TON

✅ Transaction scanning via TON RPC
✅ In-message parsing for deposits
✅ Success-only transaction filtering
✅ Jetton transfer detection (future)

TRON

✅ Native TRX transfers
✅ TRC20 token transfer detection
✅ Energy/bandwidth awareness
✅ Confirmation threshold

BTC (NEW)

✅ UTXO Model Implementation:
- Block scanning with getblockcount
- Transaction fetching via getrawtransaction
- Output (vout) parsing for recipient addresses
- Multi-output support (multiple deposits per tx)
- Satoshi → BTC conversion
- Monitored address matching
✅ Deposit record creation
✅ Sweep item upsert
✅ RabbitMQ notification
✅ Hot wallet filtering

Bitcoin Deposit Flow:

Block N received
  → For each transaction in block
    → Fetch full transaction details (getrawtransaction)
      → For each output (vout)
        → Check if output address is monitored
          → If yes: Create deposit record (satoshis)
            → Update sweep_items table
              → Publish to RabbitMQ

4. Sweep System - Fee Optimized

✅ Lazy Sweep Strategy (Cost Optimization):

Chain	Min Idle Time	Strategy	Notes
ETH	15 minutes	Wait for accumulation	High gas, be patient
BSC	5 minutes	Fast & cheap	Low gas fees
TRON	10 minutes	Balanced	Energy-based fees
TON	5 minutes	Fast & cheap	Low fees
BTC	30 minutes	Conservative	High fees, longer confirmations

Sweep Triggers: 1. Immediate: Balance >= big_threshold (large deposits) 2. Idle-Based: Balance >= min_sweep_amount + idle_duration met 3. Liquidity: Hot wallet needs funds (future enhancement)

Fee Optimization: - ✅ EVM chains: Low priority gas (20 gwei default, EIP-1559 planned) - ✅ TRON: Pure-Go builder (bypasses TWC’s broken BlockHeader) - ✅ TON: TWC signing for native + Jetton transfers - ✅ BTC: Added to coordinator (sweep executor needs UTXO builder)

Current Sweep Integration: - ✅ Coordinator: All 5 chains (ETH, BSC, TRON, TON, BTC) - ✅ Planner: Fee-aware, idle-based scheduling - ✅ Executor: Chain-specific tx builders - ⚠️ BTC: Needs UTXO transaction builder for execution

5. RPC Provider Management

✅ Multi-Provider Failover: - ETH: QuickNode (priority 1) → Infura → NOWNodes → Public - BSC: QuickNode → NOWNodes → Public (binance.org) - TON: QuickNode REST API → GetBlock → Public - TRON: QuickNode → GetBlock → TronGrid → Public - BTC: QuickNode → Public (bitcoin.publicnode.com)

✅ Health & Circuit Breaker (Optimized):

Circuit Breaker:
  - Threshold: 50% error rate
  - Min Requests: 5 (fast trigger)
  - Open Timeout: 30s (fast recovery)
  - Half-Open Max: 3 attempts

Health Checks:
  - Interval: 15s (frequent monitoring)
  - Timeout: 10s
  - Success Window: 20 requests
  - Latency Window: 20 requests

✅ Selection Strategy: - Health-weighted: Prioritizes providers with best success rate & latency - Automatic fallback on provider failure - Real-time health tracking with sliding windows - Fixed: recordedCount for accurate success rate on startup

🟡 IN PROGRESS - Remaining Work

6. Bitcoin UTXO Transaction Builder

Status: Deposit detection ✅ | Sweep/Withdrawal ⚠️

What’s Needed: 1. UTXO Selection Algorithm: - Fetch UTXOs for address via listunspent or scantxoutset - Select optimal UTXOs (largest-first or coin selection algorithm) - Calculate total input value - Determine change output (if input > amount + fee)

Transaction Building:
- Create inputs (prevTxHash + vout index)
- Create outputs (recipient + change address)
- Calculate fee (size-based: ~1-10 sat/vB depending on priority)
- Build unsigned transaction (P2PKH, P2WPKH, or P2SH)
Signing:
- TWC or pure-Go Bitcoin signing
- SIGHASH_ALL for standard transactions
- Support SegWit (Bech32) addresses
Broadcasting:
- sendrawtransaction via Bitcoin RPC
- Handle fee estimation errors
- Retry logic for broadcast failures

📊 System Metrics & Monitoring

Prometheus Metrics Instrumented:

watcher_blocks_scanned_total{chain, status} - Block scan success/error count
watcher_blocks_behind{chain} - How many blocks behind latest
watcher_deposits_detected{chain, status} - Deposit detection count
watcher_block_scan_duration_seconds{chain} - Block processing time
rpc_calls_total{chain, provider, method, status} - RPC call count
rpc_call_duration_seconds{chain, provider, method} - RPC latency
rpc_circuit_breaker_state{chain, provider} - Circuit breaker state (closed/open/half-open)

Health Check Endpoints:

Watcher services: :9091/healthz (per-chain)
Wallet service: :8081/healthz
Withdrawal service: :8082/healthz

🎯 Production Readiness Score

Component	Status	Score
Watchers (All Chains)	✅ Operational	⁵⁄₅
Deposit Detection	✅ Complete	⁵⁄₅
Sweep System	✅ Optimized (BTC executor pending)	4.⁵⁄₅
Withdrawal System	⚠️ BTC UTXO builder needed	⁴⁄₅
RPC Resilience	✅ Multi-provider + circuit breaker	⁵⁄₅
Monitoring	✅ Prometheus + health checks	⁵⁄₅
Testing	⚠️ Needs real deposit/withdrawal tests	²⁄₅

Overall: 85% Production Ready

This document is a copy of the root BLOCKCHAIN_PRODUCTION_STATUS.md for docs-site linking. For the full version including troubleshooting and architecture decisions, see the repo root file.