owl-contracts 0.1.3

A Python library to retrieve smart contract function metadata and data from EVM-compatible blockchains

🦉 Owl - Smart Contract Data Retrieval

A Python library to easily retrieve function metadata and data from any smart contract on EVM-compatible blockchains.

Installation

pip install -e .

Or install with dependencies:

pip install web3 requests

Quick Start

import owl

# Configure the library
owl.configure(
    etherscan_api_key="YOUR_ETHERSCAN_API_KEY",
    rpc_url="https://eth.public-rpc.com",  # or your preferred RPC
    chain="ethereum"  # ethereum, polygon, bsc, arbitrum, etc.
)

# Get all functions from a contract (USDT example)
functions = owl.get_functions("0xdAC17F958D2ee523a2206206994597C13D831ec7")
for fn in functions:
    print(f"📌 {fn['name']}")
    print(f"   Inputs: {fn['inputs']}")
    print(f"   Outputs: {fn['outputs']}")

# Call a function and get data
result = owl.get_data(
    "0xdAC17F958D2ee523a2206206994597C13D831ec7",
    "totalSupply",
    []
)
print(f"Total Supply: {result['result']}")

Environment Variables

Instead of calling configure(), you can set these environment variables:

export OWL_ETHERSCAN_API_KEY="your_key"
export OWL_RPC_URL="https://eth.public-rpc.com"
export OWL_CHAIN="ethereum"

API Reference

owl.get_functions(contract_address, abi=None, include_events=False, only_view=False)

Get all functions from a smart contract.

Parameters:

• contract_address (str): The contract address
• abi (list, optional): Provide custom ABI instead of fetching
• include_events (bool): Include contract events (default: False)
• only_view (bool): Only return view/pure functions (default: False)

Returns: List of function definitions with signatures, inputs, and outputs.

---

owl.get_data(contract_address, function_name, inputs=None, start_date=None, end_date=None)

Call a contract function and get the result.

Parameters:

• contract_address (str): The contract address
• function_name (str): Name of the function to call
• inputs (list, optional): Input arguments for the function
• start_date (str, optional): Start date for historical data ("YYYY-MM-DD")
• end_date (str, optional): End date for historical data ("YYYY-MM-DD")

Returns:

• Without date range: {"result": ..., "block": 12345, "timestamp": "..."}
• With date range: List of results at sampled blocks

---

Supported Chains

Chain	Explorer API
Ethereum	Etherscan
Polygon	Polygonscan
BSC	BscScan
Arbitrum	Arbiscan
Optimism	OP Etherscan
Avalanche	Snowtrace
Fantom	FTMScan
Base	BaseScan

Error Handling

from owl.exceptions import (
    OwlConfigurationError,    # Missing API key or RPC
    ContractNotFoundError,    # Invalid contract address
    ABINotFoundError,         # Contract not verified
    FunctionNotFoundError,    # Function doesn't exist
    InvalidInputError,        # Wrong input parameters
    HistoricalDataUnavailableError,  # Archive node required
    DateRangeError,           # Invalid date format
)

try:
    result = owl.get_data("0x...", "unknownFunc", [])
except FunctionNotFoundError as e:
    print(f"Function not found! Available: {e.available_functions}")

License

MIT