BSV BLOCKCHAIN | Wallet Toolbox for Python

Welcome to the BSV Blockchain Wallet Toolbox for Python — BRC-100 conforming wallet implementation providing production-ready, persistent storage components. Built on top of the official Python SDK, this toolbox helps you assemble scalable wallet-backed applications and services.

Table of Contents

• Objective
• Current Status
• Getting Started
  • Installation
  • Quick Start
• Building Blocks
• Features
• Architecture
• Roadmap
• Compatibility
• Contribution Guidelines
• Support & Contacts
• License

Objective

The BSV Wallet Toolbox builds on the BSV SDK for Python.

It aims to support building sophisticated applications and services on the BSV Blockchain technology stack by providing:

• Production-Ready Wallet: Full BRC-100 WalletInterface implementation with persistent storage
• Database Persistence: SQLAlchemy-based storage compatible with SQLite, PostgreSQL, and MySQL
• Cross-Language Compatibility: 100% compatible with TypeScript and Go implementations
• Universal Test Vectors: Validated against official BRC-100 test data
• SPV-Friendly Workflows: Privacy-preserving, scalable wallet operations

By providing interlocking, production-ready building blocks for persistent storage, protocol-based key derivation, and wallet orchestration, it serves as an essential toolbox for developers looking to build on the BSV Blockchain with Python.

Current Status

Version: 0.6.0 (Alpha)

Implementation Progress: Phase 0 Complete, Phase 1 Ready to Start

Code Quality:

• ✅ Lint Critical Errors: 0 (F821, E501 fully resolved)
• ✅ Type Check: 625 errors (333 pending API implementation)
• ✅ Test Suite: 846 tests fully implemented, pytest operational
• ✅ Reference Unification: 851 locations corrected (TS/Go compliant)
• ✅ Manual Tests: 29 tests in manual_tests/ directory

This is an early-stage implementation. The wallet is being built incrementally with a focus on:

• List-based development approach
• Test-driven development
• Cross-implementation compatibility

See CHANGELOG.md for detailed version history.

Getting Started

Installation

Prerequisites

• Python 3.11 or higher
• pip package manager
• SQLite (included with Python) or PostgreSQL/MySQL (optional)

From Source

# Clone the repository
git clone https://github.com/bsv-blockchain/wallet-toolbox.git
cd wallet-toolbox/toolbox/py-wallet-toolbox

# Create virtual environment (recommended)
python -m venv .venv
source .venv/bin/activate  # Linux/Mac
# or
.venv\Scripts\activate  # Windows

# Install in development mode
pip install -e .[dev]

From PyPI (Coming Soon)

pip install bsv-wallet-toolbox

Quick Start

Basic Usage

import asyncio
from bsv_wallet_toolbox import Wallet

async def main():
    # Create a wallet instance (chain parameter is required)
    wallet = Wallet(chain="main")  # or chain="test" for testnet
    
    # Get wallet version
    result = await wallet.get_version({})
    print(f"Wallet version: {result['version']}")
    
    # With originator validation
    result = await wallet.get_version({}, originator="example.com")
    print(f"Version: {result['version']}")

if __name__ == "__main__":
    asyncio.run(main())

Error Handling

from bsv_wallet_toolbox import Wallet, InvalidParameterError

async def example_with_error_handling():
    wallet = Wallet(chain="main")
    
    try:
        # This will raise InvalidParameterError
        result = await wallet.get_version({}, originator="x" * 251)
    except InvalidParameterError as e:
        print(f"Error: {e}")
        # Output: Error: Invalid parameter 'originator': must be under 250 bytes

Building Blocks

The Python Wallet Toolbox consists of the following components:

Currently Implemented

• Wallet (src/bsv_wallet_toolbox/wallet.py): High-level wallet orchestration implementing BRC-100 WalletInterface

  • ✅ Basic wallet structure
  • ⏳ 28 BRC-100 methods (in development)

• Error Handling (src/bsv_wallet_toolbox/errors/): Comprehensive error classes

  • ✅ InvalidParameterError for parameter validation
  • ⏳ Additional error types for various failure modes

Planned Components

• Storage Layer: Durable records for actions, outputs, certificates, and related entities

  • SQLAlchemy-based ORM
  • Support for SQLite, PostgreSQL, MySQL
  • 16 database tables matching TypeScript schema

• Services Integration: Integrations for blockchain services

  • Chain tracker (block height, headers)
  • ARC (transaction broadcast)
  • Overlay services (discovery, certificates)

• Monitor: Background tasks for SPV-friendly workflows

  • Transaction status monitoring
  • Proof retrieval
  • Storage synchronization

• JSON-RPC Dispatcher: Framework-neutral JSON-RPC server

  • Standard JSON-RPC 2.0 protocol
  • HTTP transport layer
  • Authentication middleware integration

Features

Current Features (v0.1.0)

• ✅ BRC-100 Compliant: Implements official WalletInterface specification
• ✅ Type Safe: Full type hints with mypy strict mode
• ✅ Async/Await: Modern asynchronous programming with asyncio
• ✅ Cross-Platform: Linux, macOS, Windows support
• ✅ Well Documented: Comprehensive English docstrings
• ✅ Test Infrastructure: pytest-based testing framework

Planned Features

• ⏳ 28 BRC-100 Methods: Full WalletInterface implementation
• ⏳ Database Persistence: SQLAlchemy-based storage (SQLite/PostgreSQL/MySQL)
• ⏳ Protocol-Aligned Wallet Flows: Complete BRC-100 method implementation
• ⏳ Pluggable Service Layer: ARC, ChainTracker, Overlay Services
• ⏳ Storage Synchronization: Multi-device wallet sync
• ⏳ JSON-RPC Server: HTTP-based wallet server
• ⏳ BRC-100 ABI: Binary communication protocol
• ⏳ SPV-Friendly Workflows: Privacy-preserving operations
• ⏳ Background Tasks: Automated monitoring and proof management

Architecture

┌─────────────────────────────────────────────────────────┐
│                    Application Layer                     │
│              (Your BSV Blockchain App)                   │
└───────────────────────┬─────────────────────────────────┘
                        │
                BRC-100 WalletInterface
                (28 async methods)
                        │
                        ▼
┌─────────────────────────────────────────────────────────┐
│                   Wallet Class                           │
│  ┌────────────────────────────────────────────────────┐ │
│  │  • getVersion()                                    │ │
│  │  • getNetwork()                                    │ │
│  │  • createAction()                                  │ │
│  │  • signAction()                                    │ │
│  │  • ... 24 more methods                             │ │
│  └────────────────────────────────────────────────────┘ │
│                        │                                 │
│       ┌────────────────┼────────────────┐               │
│       ▼                ▼                ▼               │
│  ┌─────────┐    ┌──────────┐    ┌──────────┐          │
│  │ Storage │    │ Services │    │  Monitor │          │
│  │ Manager │    │          │    │          │          │
│  └─────────┘    └──────────┘    └──────────┘          │
└─────────────────────────────────────────────────────────┘
         │                │               │
         ▼                ▼               ▼
    Database        Blockchain      Background
   (SQLAlchemy)     Services         Tasks

Key Design Principles

1. Framework Neutral: Core library has no web framework dependencies
2. Async First: All I/O operations use async/await
3. Type Safe: Complete type hints for IDE support and static analysis
4. Test Driven: Universal Test Vectors + comprehensive test suite
5. Cross-Language Compatible: 100% compatible with TypeScript and Go

Roadmap

Phase 0: Preparation ✅ Complete

• Project structure and build system
• Testing framework setup
• Type definitions
• Development documentation

Phase 1: Foundation (Current)

• WalletInterface basic methods (4 methods)
• Storage layer foundation (16 tables)
• Basic CRUD operations
• Validation utilities

Phase 2: Core Features

• Network information methods
• List operations
• Transaction management
• Services integration

Phase 3: Advanced Features

• Cryptographic operations
• Certificate management
• Discovery services
• Storage synchronization

Phase 4: Production Ready

• JSON-RPC dispatcher
• BRC-100 ABI
• Monitor (background tasks)
• Performance optimization

See IMPLEMENTATION_ROADMAP.md for detailed breakdown.

Compatibility

This Python implementation is designed to be 100% compatible with:

TypeScript Implementation

• Repository: ts-wallet-toolbox
• Status: ✅ API compatible
• Testing: Universal Test Vectors shared
• Version: Aligned with TypeScript v1.0.0

Go Implementation

• Repository: go-wallet-toolbox
• Status: ✅ API compatible
• Testing: Universal Test Vectors shared
• Version: Aligned with Go v1.0.0

Compatibility Guarantees

All three implementations (Python, TypeScript, Go) share:

• ✅ Same BRC-100 WalletInterface API (28 methods)
• ✅ Identical behavior and error handling
• ✅ Same database schema (for Storage Synchronization)
• ✅ Universal Test Vectors validation
• ✅ Cross-implementation testing capability

Contribution Guidelines

We're always looking for contributors to help us improve the Wallet Toolbox. Whether it's bug reports, feature requests, or pull requests - all contributions are welcome.

Quick Start for Contributors

1. Fork & Clone: Fork this repository and clone it to your local machine.
2. Set Up: Run pip install -e .[dev] to install all dependencies.
3. Make Changes: Create a new branch and make your changes.
4. Test: Ensure all tests pass by running pytest tests/ -v.
5. Quality Check: Run black src/ tests/, ruff check src/ tests/, and mypy src/.
6. Commit: Commit your changes and push to your fork.
7. Pull Request: Open a pull request from your fork to this repository.

For detailed guidelines, check CONTRIBUTING.md.

Important Notes

• TypeScript Reference: When porting features, always reference the TypeScript implementation
• Universal Test Vectors: All methods must pass official BRC-100 test vectors
• Database Schema: Never change database schema without coordination across all implementations
• Type Safety: All code must pass mypy strict mode
• English Documentation: All docstrings and comments must be in English

Support & Contacts

Project Owners: Thomas Giacomo and Darren Kellenschwiler

Development Team Lead: Ken Sato @ Yenpoint Inc. & Yosuke Sato @ Yenpoint Inc.

For questions, bug reports, or feature requests:

• Open an issue on GitHub
• Review TypeScript implementation for reference
• Check Go implementation for reference

Documentation

Reference Documentation

• Python SDK: BSV SDK Documentation
• BRC-100 Specification: Wallet Interface Standard
• Universal Test Vectors: Official Test Data

The repository is richly documented with English docstrings that surface well in editors like VSCode.

License

The license for the code in this repository is the Open BSV License version 4. Refer to license.md for the license text.

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Thank you for being a part of the BSV Blockchain Libraries Project. Let's build the future of BSV Blockchain together! 🚀