btcaaron 0.2.1

A Bitcoin Testnet transaction toolkit supporting Legacy, SegWit, and Taproot

btcaaron

A pragmatic Bitcoin toolkit with a clear path toward full Taproot engineering.

Designed for reproducible testnet experiments, educational workflows, and script-path development.

Current Status

v0.1.2 — Stable foundation release.
Core utilities actively used in my Taproot engineering work and on-chain experiments.

v0.2.0 — Core Taproot spend-path prototype implemented and testnet-verified.
All 5 spend paths working with real transactions. Next: hardening, PSBT support, and comprehensive documentation. See DESIGN.md for roadmap.

Features

Available Now (v0.1.x)

Production-tested on testnet with real transactions:

• Generate Legacy / SegWit / Taproot addresses from WIF
• UTXO scanning and balance lookup via public APIs
• Build and sign standard transactions
• Broadcast to Blockstream / Mempool endpoints
• Developer helpers (WIFKey, quick_transfer)

Available Now (v0.2.0 - Prototype)

Testnet-verified with real transactions (23 tests, all passing):

• Declarative Taproot tree builder (.hashlock(), .multisig(), .timelock(), .checksig())
• Script-path and key-path spend constructors
• Automatic witness construction and signature ordering
• All 5 spend paths verified: hashlock, multisig, checksig, CSV timelock, keypath
• Real transaction TXID reproduction tests

Future (v0.3.x+)

• PSBT v2 support (Taproot-aware)
• Custom script templates
• Multi-input/output transactions

Requirements

• Python >= 3.7
• Dependencies: requests>=2.25.0, bitcoin-utils>=0.7.1

Installation

pip install btcaaron

Or from source:

git clone https://github.com/aaron-recompile/btcaaron.git
cd btcaaron
pip install .

Quick Start

from btcaaron import WIFKey, quick_transfer

wif = "your_testnet_wif"

key = WIFKey(wif)
print("Taproot:", key.get_taproot().address)

balance = key.get_taproot().get_balance()
print("Balance:", balance, "sats")

if balance > 1000:
    txid = quick_transfer(wif, "taproot", "tb1q...", amount=500, fee=300)
    print("Broadcasted:", txid)

v0.2.0 API Example

Taproot-native API — core features available now.

from btcaaron import Key, TapTree

alice = Key.from_wif("cRxebG...")
bob = Key.from_wif("cSNdLF...")

program = (TapTree(internal_key=alice)
    .hashlock("secret", label="hash")
    .multisig(2, [alice, bob], label="2of2")
    .timelock(blocks=144, then=bob, label="csv")
    .checksig(bob, label="backup")
).build()

print(program.address)  # tb1p...

tx = (program.spend("hash")
    .from_utxo("abc123...", 0, sats=1200)
    .to("tb1p...", 666)
    .unlock(preimage="secret")
    .build())

tx.broadcast()

Full specification in DESIGN.md.

Testing

Run the test suite:

python -m pytest tests/

Run specific test suites:

# v0.2.0 comprehensive tests (pytest)
python -m pytest tests/test_btcaaron_v0.2.py -v

# v0.1.x example-based tests
python tests/test_btcaaron_v0.1.py

Project Structure

btcaaron/
├── btcaaron/         # Core library
├── tests/            # Test suite
├── DESIGN.md         # Architecture & roadmap
├── README.md
├── setup.py
└── LICENSE

Development

See DESIGN.md for architecture details and development roadmap.

Notes

• Testnet Only: This toolkit is designed for testnet use. Mainnet support may be added in future versions.
• v0.2.0 Status: Core Taproot spend-path flows are implemented and testnet-verified; ongoing work focuses on hardening, PSBT, and documentation.

Author

Aaron Zhang
Reproducible Taproot experiments · Script engineering · Educational tooling
https://x.com/aaron_recompile

License

MIT License