bitcoinlib is a comprehensive Python library for handling Bitcoin and other cryptocurrencies. It provides functionalities for creating and managing wallets, keys, addresses, scripts, and transactions, supporting various networks like mainnet, testnet, and regtest. The current stable version is 0.7.8, with updates typically focusing on bug fixes, performance improvements, and feature enhancements as the underlying protocols evolve.
pip install bitcoinlibVerified import paths — ran on the pinned version, not inferred.
This quickstart demonstrates how to create or load a persistent wallet, generate a new address, and retrieve its private key (for demonstration purposes only; private keys should be handled with extreme care in production). It emphasizes explicit network selection and proper wallet closure.
Review the official documentation for 0.7.x, especially sections on `bitcoinlib.wallets` and `bitcoinlib.networks`, and update your code to use the new interfaces. Explicitly import `Network` and pass it to wallet creation.
Always explicitly specify the desired network using the `network` parameter, e.g., `Wallet.create('mywallet', network='testnet')` or `from bitcoinlib.networks import Network; network = Network('regtest')`.Ensure `wallet.close()` is called when you are finished with a wallet instance to persist any changes. Consider using a `try...finally` block or a `with` statement if the wallet supports it (check docs) to guarantee closure.
Never expose private keys in logs, commit them to version control, or store them insecurely. For production, consider using hardware security modules (HSMs) or secure key management services. Only use `key.wif` for demonstration or very specific, secure local operations.
Always include a transaction fee. Use `transaction.send()` which often handles fee estimation, or manually set `transaction.fee()` after adding inputs and outputs, and before signing and sending. Monitor network fee rates.
Before loading, ensure the wallet has been created using `Wallet.create('my_wallet', ...)` at least once. If you use custom database URIs, ensure you're providing the correct `db_uri` when instantiating the Wallet.Double-check the private key string. Ensure it's a valid Wallet Import Format (WIF) string, a correct 64-character hexadecimal string, or the specific format expected by the `Key` constructor you are using.
Verify the wallet's balance using `wallet.get_balance()`. Ensure that the funds are confirmed on the blockchain. Reduce the transaction amount or add more funds to the wallet.
Use the correct import statement: `from bitcoinlib.wallets import Wallet`. Similar issues might arise for `keys`, `transactions`, or `networks` modules if using incorrect paths.
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