@btc-stamps/tx-builder 🚀

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🎯 Why tx-builder?

@btc-stamps/tx-builder is the only transaction builder with first-class support for Bitcoin Stamp metaprotocols. This can be extended to support other metaprotocols like Runes or BRC-20.

✨ Key Features

• 🖼️ Bitcoin Stamps: Complete Bitcoin Stamp metaprotocol support
• 🪙 SRC-20 Tokens: Full lifecycle support (deploy, mint, transfer)
• 🛡️ UTXO Protection: Automatic protection of Ordinals, Inscriptions, Stamps & Counterparty assets
• ⚡ Smart Selection: 6 UTXO selection algorithms with optimization
• 🔌 Zero Config: Works out-of-the-box with reliable defaults
• 🌳 Tree-Shakeable: Optimized for modern bundlers with sideEffects: false
• 📦 Lightweight: Minimal dependencies, maximum performance
• 🧪 Battle-Tested: Comprehensive test suite with 430+ tests
• 🔒 Type-Safe: Full TypeScript support with detailed types

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📦 Installation

Node.js / TypeScript

npm install @btc-stamps/tx-builder
# or
yarn add @btc-stamps/tx-builder
# or
pnpm add @btc-stamps/tx-builder
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Deno

import { TransactionBuilder } from 'npm:@btc-stamps/tx-builder@^0.1.6';
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Requirements

• Node.js >= 18.0.0 or Bun >= 1.0.0
• TypeScript >= 5.0.0 (for TypeScript users)
• Deno: Partial support via npm compatibility (see guide)

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🚀 Quick Start

Bitcoin Stamps with UTXO Protection

import { BitcoinStampBuilder, SelectorFactory } from '@btc-stamps/tx-builder';

// Zero-config setup with automatic UTXO protection
const selectorFactory = SelectorFactory.getInstance();
const builder = new BitcoinStampBuilder(network, selectorFactory);

// Build stamp transaction - automatically protects:
// ✅ Ordinals (sats with inscriptions or runes)
// ✅ Bitcoin Stamps (all types)
// ✅ Counterparty assets (XCP, PEPECASH, etc.)
// ✅ SRC-20 tokens
const result = await builder.buildStampTransaction(utxos, {
  stampData: {
    imageData: imageBuffer,
    filename: 'my-stamp.png',
  },
  fromAddress: 'bc1q...',
  feeRate: 20,
  algorithm: 'protection-aware', // Optional: explicitly use protection-aware selection
});
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SRC-20 Tokens

import { SRC20Encoder, SRC20TokenBuilder } from '@btc-stamps/tx-builder';

const encoder = new SRC20Encoder();

// Deploy new token
const deployData = await encoder.encode({
  p: 'SRC-20',
  op: 'DEPLOY',
  tick: 'KEVIN',
  max: '21000000',
  lim: '1000',
});

// Build transaction
const psbt = await new SRC20TokenBuilder().buildSRC20Transaction({
  encodedData: deployData,
  utxos: selectedUTXOs,
  changeAddress: 'bc1q...',
  feeRate: 15,
});
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🛡️ Advanced UTXO Protection

Built-in protection for Ordinals, Inscriptions, Stamps, Counterparty assets, and SRC-20 tokens is automatic in all builders.

// For custom protection configuration:
const selector = selectorFactory.createSelector('protection-aware', {
  protectionConfig: {
    enableOrdinalsDetection: true, // Detect inscriptions and runes
    enableCounterpartyDetection: true, // Detect UTXO attached assets
    enableStampsDetection: true, // Detect UTXO attached stamps
  },
});

// Use with any builder
builder.setSelector(selector);
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⚡ UTXO Selection Algorithms

Optimize transaction fees with multiple selection strategies:

import {
  AccumulativeSelector, // Fast selection
  BlackjackSelector, // Target exact amounts
  BranchAndBoundSelector, // Optimal selection
  WasteOptimizedSelector, // Long-term optimization
} from '@btc-stamps/tx-builder';
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🌐 Network Support

Zero-configuration with reliable defaults:

// Works immediately - no setup required
const provider = new ElectrumXProvider(); // Uses blockstream.info, fortress.qtornado.com, etc.
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Networks: Mainnet, Testnet, Regtest with automatic server selection

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📚 Learn More

• 📖 Documentation Site - Interactive documentation
• 🔌 API Reference - Complete API documentation
• 💡 Examples - Ready-to-use code examples
• 🛡️ UTXO Protection Guide - Essential for production
• 🏗️ Architecture Overview - Technical deep dive
• 📦 NPM Package - View on npm registry
• 🦕 JSR Package - View on JSR (Deno/TypeScript)

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🧪 Testing

npm test              # Run all tests
npm run test:unit     # Unit tests only
npm run test:coverage # Coverage report
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🤝 Contributing

Contributions welcome! See Contributing Guide for details.

Development Setup

# Clone the repository
git clone https://github.com/btc-stamps/tx-builder.git
cd tx-builder

# Install dependencies
npm install

# Run tests
npm test

# Build the package
npm run build
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📄 License

MIT License - see LICENSE file.

🙏 Acknowledgments

Built on top of excellent libraries:

• bitcoinjs-lib - Bitcoin protocol implementation
• tiny-secp256k1 - Elliptic curve cryptography
• bip32 - HD wallet support

💬 Support

• GitHub Issues: Report bugs or request features
• Discussions: Ask questions and share ideas
• Telegram: @BitcoinStamps

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