Optional
API endpoint. Supports both base URL format (e.g., "https://toncenter.com/") and full API path format (e.g., "https://testnet.toncenter.com/api/v2/jsonRPC") for backward compatibility.
API endpoint. Supports both base URL format (e.g., "https://toncenter.com/") and full API path format (e.g., "https://testnet.toncenter.com/api/v2/jsonRPC") for backward compatibility.