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"""
RPC Node Collectors
Fetches blockchain data from RPC endpoints (Infura, Alchemy, Ankr, etc.)
"""
import asyncio
from datetime import datetime, timezone
from typing import Dict, List, Optional, Any
from utils.api_client import get_client
from utils.logger import setup_logger, log_api_request, log_error
logger = setup_logger("rpc_collector")
async def get_eth_block_number(provider: str, rpc_url: str, api_key: Optional[str] = None) -> Dict[str, Any]:
"""
Fetch latest Ethereum block number from RPC endpoint
Args:
provider: Provider name (e.g., "Infura", "Alchemy")
rpc_url: RPC endpoint URL
api_key: Optional API key to append to URL
Returns:
Dict with provider, category, data, timestamp, success, error
"""
category = "rpc_nodes"
endpoint = "eth_blockNumber"
logger.info(f"Fetching block number from {provider}")
try:
client = get_client()
# Build URL with API key if provided
url = f"{rpc_url}/{api_key}" if api_key else rpc_url
# JSON-RPC request payload
payload = {
"jsonrpc": "2.0",
"method": "eth_blockNumber",
"params": [],
"id": 1
}
headers = {"Content-Type": "application/json"}
# Make request
response = await client.post(url, json=payload, headers=headers, timeout=10)
# Log request
log_api_request(
logger,
provider,
endpoint,
response.get("response_time_ms", 0),
"success" if response["success"] else "error",
response.get("status_code")
)
if not response["success"]:
error_msg = response.get("error_message", "Unknown error")
log_error(logger, provider, response.get("error_type", "unknown"), error_msg, endpoint)
return {
"provider": provider,
"category": category,
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": error_msg,
"error_type": response.get("error_type")
}
# Extract data
data = response["data"]
# Parse hex block number
block_data = None
if isinstance(data, dict) and "result" in data:
hex_block = data["result"]
block_number = int(hex_block, 16) if hex_block else 0
block_data = {
"block_number": block_number,
"hex": hex_block,
"chain": "ethereum"
}
logger.info(f"{provider} - {endpoint} - Block: {block_data.get('block_number', 'N/A')}")
return {
"provider": provider,
"category": category,
"data": block_data,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": True,
"error": None,
"response_time_ms": response.get("response_time_ms", 0)
}
except Exception as e:
error_msg = f"Unexpected error: {str(e)}"
log_error(logger, provider, "exception", error_msg, endpoint, exc_info=True)
return {
"provider": provider,
"category": category,
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": error_msg,
"error_type": "exception"
}
async def get_eth_gas_price(provider: str, rpc_url: str, api_key: Optional[str] = None) -> Dict[str, Any]:
"""
Fetch current gas price from RPC endpoint
Args:
provider: Provider name
rpc_url: RPC endpoint URL
api_key: Optional API key
Returns:
Dict with gas price data
"""
category = "rpc_nodes"
endpoint = "eth_gasPrice"
logger.info(f"Fetching gas price from {provider}")
try:
client = get_client()
url = f"{rpc_url}/{api_key}" if api_key else rpc_url
payload = {
"jsonrpc": "2.0",
"method": "eth_gasPrice",
"params": [],
"id": 1
}
headers = {"Content-Type": "application/json"}
response = await client.post(url, json=payload, headers=headers, timeout=10)
log_api_request(
logger,
provider,
endpoint,
response.get("response_time_ms", 0),
"success" if response["success"] else "error",
response.get("status_code")
)
if not response["success"]:
error_msg = response.get("error_message", "Unknown error")
log_error(logger, provider, response.get("error_type", "unknown"), error_msg, endpoint)
return {
"provider": provider,
"category": category,
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": error_msg,
"error_type": response.get("error_type")
}
data = response["data"]
gas_data = None
if isinstance(data, dict) and "result" in data:
hex_gas = data["result"]
gas_wei = int(hex_gas, 16) if hex_gas else 0
gas_gwei = gas_wei / 1e9
gas_data = {
"gas_price_wei": gas_wei,
"gas_price_gwei": round(gas_gwei, 2),
"hex": hex_gas,
"chain": "ethereum"
}
logger.info(f"{provider} - {endpoint} - Gas: {gas_data.get('gas_price_gwei', 'N/A')} Gwei")
return {
"provider": provider,
"category": category,
"data": gas_data,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": True,
"error": None,
"response_time_ms": response.get("response_time_ms", 0)
}
except Exception as e:
error_msg = f"Unexpected error: {str(e)}"
log_error(logger, provider, "exception", error_msg, endpoint, exc_info=True)
return {
"provider": provider,
"category": category,
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": error_msg,
"error_type": "exception"
}
async def get_eth_chain_id(provider: str, rpc_url: str, api_key: Optional[str] = None) -> Dict[str, Any]:
"""
Fetch chain ID from RPC endpoint
Args:
provider: Provider name
rpc_url: RPC endpoint URL
api_key: Optional API key
Returns:
Dict with chain ID data
"""
category = "rpc_nodes"
endpoint = "eth_chainId"
try:
client = get_client()
url = f"{rpc_url}/{api_key}" if api_key else rpc_url
payload = {
"jsonrpc": "2.0",
"method": "eth_chainId",
"params": [],
"id": 1
}
headers = {"Content-Type": "application/json"}
response = await client.post(url, json=payload, headers=headers, timeout=10)
if not response["success"]:
error_msg = response.get("error_message", "Unknown error")
return {
"provider": provider,
"category": category,
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": error_msg
}
data = response["data"]
chain_data = None
if isinstance(data, dict) and "result" in data:
hex_chain = data["result"]
chain_id = int(hex_chain, 16) if hex_chain else 0
# Map chain IDs to names
chain_names = {
1: "Ethereum Mainnet",
3: "Ropsten",
4: "Rinkeby",
5: "Goerli",
11155111: "Sepolia",
56: "BSC Mainnet",
97: "BSC Testnet",
137: "Polygon Mainnet",
80001: "Mumbai Testnet"
}
chain_data = {
"chain_id": chain_id,
"chain_name": chain_names.get(chain_id, f"Unknown (ID: {chain_id})"),
"hex": hex_chain
}
return {
"provider": provider,
"category": category,
"data": chain_data,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": True,
"error": None,
"response_time_ms": response.get("response_time_ms", 0)
}
except Exception as e:
return {
"provider": provider,
"category": category,
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": str(e),
"error_type": "exception"
}
async def collect_infura_data(api_key: Optional[str] = None) -> List[Dict[str, Any]]:
"""
Collect data from Infura RPC endpoints
Args:
api_key: Infura project ID
Returns:
List of results from Infura endpoints
"""
provider = "Infura"
rpc_url = "https://mainnet.infura.io/v3"
if not api_key:
logger.warning(f"{provider} - No API key provided, skipping")
return [{
"provider": provider,
"category": "rpc_nodes",
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": "API key required",
"error_type": "missing_api_key"
}]
logger.info(f"Starting {provider} data collection")
results = await asyncio.gather(
get_eth_block_number(provider, rpc_url, api_key),
get_eth_gas_price(provider, rpc_url, api_key),
get_eth_chain_id(provider, rpc_url, api_key),
return_exceptions=True
)
processed = []
for result in results:
if isinstance(result, Exception):
logger.error(f"{provider} - Collector failed: {str(result)}")
processed.append({
"provider": provider,
"category": "rpc_nodes",
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": str(result),
"error_type": "exception"
})
else:
processed.append(result)
successful = sum(1 for r in processed if r.get("success", False))
logger.info(f"{provider} - Collection complete: {successful}/{len(processed)} successful")
return processed
async def collect_alchemy_data(api_key: Optional[str] = None) -> List[Dict[str, Any]]:
"""
Collect data from Alchemy RPC endpoints
Args:
api_key: Alchemy API key
Returns:
List of results from Alchemy endpoints
"""
provider = "Alchemy"
rpc_url = "https://eth-mainnet.g.alchemy.com/v2"
if not api_key:
logger.warning(f"{provider} - No API key provided, using free tier")
# Alchemy has a public demo endpoint
api_key = "demo"
logger.info(f"Starting {provider} data collection")
results = await asyncio.gather(
get_eth_block_number(provider, rpc_url, api_key),
get_eth_gas_price(provider, rpc_url, api_key),
get_eth_chain_id(provider, rpc_url, api_key),
return_exceptions=True
)
processed = []
for result in results:
if isinstance(result, Exception):
logger.error(f"{provider} - Collector failed: {str(result)}")
processed.append({
"provider": provider,
"category": "rpc_nodes",
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": str(result),
"error_type": "exception"
})
else:
processed.append(result)
successful = sum(1 for r in processed if r.get("success", False))
logger.info(f"{provider} - Collection complete: {successful}/{len(processed)} successful")
return processed
async def collect_ankr_data() -> List[Dict[str, Any]]:
"""
Collect data from Ankr public RPC endpoints (no key required)
Returns:
List of results from Ankr endpoints
"""
provider = "Ankr"
rpc_url = "https://rpc.ankr.com/eth"
logger.info(f"Starting {provider} data collection")
results = await asyncio.gather(
get_eth_block_number(provider, rpc_url),
get_eth_gas_price(provider, rpc_url),
get_eth_chain_id(provider, rpc_url),
return_exceptions=True
)
processed = []
for result in results:
if isinstance(result, Exception):
logger.error(f"{provider} - Collector failed: {str(result)}")
processed.append({
"provider": provider,
"category": "rpc_nodes",
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": str(result),
"error_type": "exception"
})
else:
processed.append(result)
successful = sum(1 for r in processed if r.get("success", False))
logger.info(f"{provider} - Collection complete: {successful}/{len(processed)} successful")
return processed
async def collect_public_rpc_data() -> List[Dict[str, Any]]:
"""
Collect data from free public RPC endpoints
Returns:
List of results from public endpoints
"""
logger.info("Starting public RPC data collection")
public_rpcs = [
("Cloudflare", "https://cloudflare-eth.com"),
("PublicNode", "https://ethereum.publicnode.com"),
("LlamaNodes", "https://eth.llamarpc.com"),
]
all_results = []
for provider, rpc_url in public_rpcs:
results = await asyncio.gather(
get_eth_block_number(provider, rpc_url),
get_eth_gas_price(provider, rpc_url),
return_exceptions=True
)
for result in results:
if isinstance(result, Exception):
logger.error(f"{provider} - Collector failed: {str(result)}")
all_results.append({
"provider": provider,
"category": "rpc_nodes",
"data": None,
"timestamp": datetime.now(timezone.utc).isoformat(),
"success": False,
"error": str(result),
"error_type": "exception"
})
else:
all_results.append(result)
successful = sum(1 for r in all_results if r.get("success", False))
logger.info(f"Public RPC collection complete: {successful}/{len(all_results)} successful")
return all_results
async def collect_rpc_data(
infura_key: Optional[str] = None,
alchemy_key: Optional[str] = None
) -> List[Dict[str, Any]]:
"""
Main function to collect RPC data from all sources
Args:
infura_key: Infura project ID
alchemy_key: Alchemy API key
Returns:
List of results from all RPC collectors
"""
logger.info("Starting RPC data collection from all sources")
# Collect from all providers
all_results = []
# Infura (requires key)
if infura_key:
infura_results = await collect_infura_data(infura_key)
all_results.extend(infura_results)
# Alchemy (has free tier)
alchemy_results = await collect_alchemy_data(alchemy_key)
all_results.extend(alchemy_results)
# Ankr (free, no key needed)
ankr_results = await collect_ankr_data()
all_results.extend(ankr_results)
# Public RPCs (free)
public_results = await collect_public_rpc_data()
all_results.extend(public_results)
# Log summary
successful = sum(1 for r in all_results if r.get("success", False))
logger.info(f"RPC data collection complete: {successful}/{len(all_results)} successful")
return all_results
class RPCNodeCollector:
"""
RPC Node Collector class for WebSocket streaming interface
Wraps the standalone RPC node collection functions
"""
def __init__(self, config: Any = None):
"""
Initialize the RPC node collector
Args:
config: Configuration object (optional, for compatibility)
"""
self.config = config
self.logger = logger
async def collect(self) -> Dict[str, Any]:
"""
Collect RPC node data from all sources
Returns:
Dict with aggregated RPC node data
"""
import os
infura_key = os.getenv("INFURA_API_KEY")
alchemy_key = os.getenv("ALCHEMY_API_KEY")
results = await collect_rpc_data(infura_key, alchemy_key)
# Aggregate data for WebSocket streaming
aggregated = {
"nodes": [],
"active_nodes": 0,
"total_nodes": 0,
"average_latency": 0,
"events": [],
"block_number": None,
"timestamp": datetime.now(timezone.utc).isoformat()
}
total_latency = 0
latency_count = 0
for result in results:
aggregated["total_nodes"] += 1
if result.get("success"):
aggregated["active_nodes"] += 1
provider = result.get("provider", "unknown")
response_time = result.get("response_time_ms", 0)
data = result.get("data", {})
# Track latency
if response_time:
total_latency += response_time
latency_count += 1
# Add node info
node_info = {
"provider": provider,
"response_time_ms": response_time,
"status": "active",
"data": data
}
# Extract block number
if "result" in data and isinstance(data["result"], str):
try:
block_number = int(data["result"], 16)
node_info["block_number"] = block_number
if aggregated["block_number"] is None or block_number > aggregated["block_number"]:
aggregated["block_number"] = block_number
except:
pass
aggregated["nodes"].append(node_info)
# Calculate average latency
if latency_count > 0:
aggregated["average_latency"] = total_latency / latency_count
return aggregated
# Example usage
if __name__ == "__main__":
async def main():
import os
infura_key = os.getenv("INFURA_API_KEY")
alchemy_key = os.getenv("ALCHEMY_API_KEY")
results = await collect_rpc_data(infura_key, alchemy_key)
print("\n=== RPC Data Collection Results ===")
for result in results:
print(f"\nProvider: {result['provider']}")
print(f"Success: {result['success']}")
if result['success']:
print(f"Response Time: {result.get('response_time_ms', 0):.2f}ms")
data = result.get('data', {})
if data:
print(f"Data: {data}")
else:
print(f"Error: {result.get('error', 'Unknown')}")
asyncio.run(main())
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