Error Handling

import requests

response = requests.get(
    'https://api.sim.dune.com/v1/evm/balances/0xd8da6bf26964af9d7eed9e03e53415d37aa96045',
    headers={'X-Sim-Api-Key': 'YOUR_API_KEY'},
    params={'chain_ids': '1,9999,10'}
)

data = response.json()

# Check for warnings
if 'warnings' in data and len(data['warnings']) > 0:
    for warning in data['warnings']:
        if warning['code'] == 'UNSUPPORTED_CHAIN_IDS':
            print(f"Warning: Chains {warning['chain_ids']} are not supported.")
            print(f"See: {warning['docs_url']}")

# Process the data that was successfully returned
print(f"Found {len(data['balances'])} balances")

import requests
import time

def get_balances(address, api_key, max_retries=3):
    url = f"https://api.sim.dune.com/v1/evm/balances/{address}"
    headers = {"X-Sim-Api-Key": api_key}
    
    for attempt in range(max_retries):
        try:
            response = requests.get(url, headers=headers)
            response.raise_for_status()  # Raises an exception for 4XX/5XX responses
            return response.json()
            
        except requests.exceptions.HTTPError as err:
            status_code = err.response.status_code
            error_data = {}
            
            # Parse error body. Some endpoints return JSON, others plain text.
            try:
                error_data = err.response.json()
                error_message = error_data.get('error') or error_data.get('message', 'Unknown error')
            except ValueError:
                error_message = err.response.text or 'Unknown error'
            
            print(f"HTTP Error {status_code}: {error_message}")
            
            # Handle specific error codes
            if status_code == 429:  # Rate limit exceeded
                wait_time = min(2 ** attempt, 60)  # Exponential backoff
                print(f"Rate limit exceeded. Retrying in {wait_time} seconds...")
                time.sleep(wait_time)
                continue
            elif status_code == 500:  # Server error
                if attempt < max_retries - 1:
                    wait_time = 2 ** attempt
                    print(f"Server error. Retrying in {wait_time} seconds...")
                    time.sleep(wait_time)
                    continue
            
            # For other errors or if we've exhausted retries
            return {"error": error_message, "status_code": status_code}
            
        except requests.exceptions.RequestException as err:
            print(f"Request error: {err}")
            return {"error": "Network or connection error", "details": str(err)}
    
    return {"error": "Max retries exceeded"}

# Usage
result = get_balances("0xd8da6bf26964af9d7eed9e03e53415d37aa96045", "YOUR_API_KEY")
if "error" in result:
    print(f"Failed to get balances: {result['error']}")
else:
    print(f"Found {len(result['balances'])} token balances")