Blockchain Wallet Validator

A comprehensive TypeScript library for validating blockchain wallet addresses across multiple networks.

Features

• 🚀 Lightweight: < 10KB minified + gzipped
• 🔒 Type-safe: Written in TypeScript with full type definitions
• ⚡ Fast: No heavy dependencies
• 🧪 Well-tested: Production-ready test coverage
• 🌐 Multi-network support:
  • Algorand
  • Bitcoin (Legacy, SegWit, Native SegWit)
  • Bitcoin Cash
  • Cardano
  • Core (ICAN)
  • Cosmos ecosystem (Cosmos, Osmosis, Juno, etc.)
  • NS domains on ENS standard (including subdomains and emoji support)
  • EVM-compatible chains (Ethereum, Polygon, BSC, etc.)
  • Litecoin (Legacy, SegWit, Native SegWit)
  • Polkadot
  • Ripple (XRP)
  • Solana
  • Stellar
• 📦 Modern package:
  • ESM and CommonJS support
  • Tree-shakeable
  • Zero configuration
  • Works in Node.js and browsers

Installation

# Using pnpm (recommended)
pnpm add blockchain-wallet-validator

# Using npm
npm install blockchain-wallet-validator

# Using yarn
yarn add blockchain-wallet-validator

Usage

import { validateWalletAddress } from 'blockchain-wallet-validator';

// Validate an Ethereum address with specific networks enabled
const evmResult = validateWalletAddress(
  '0x4838B106FCe9647Bdf1E7877BF73cE8B0BAD5f97',
  { network: ['evm', 'eth'] },
);
console.log(evmResult);
// {
//   network: 'evm',
//   isValid: true,
//   description: 'Ethereum Virtual Machine compatible address (Ethereum, Polygon, BSC, etc.)',
//   metadata: {
//     isChecksumValid: true,
//     format: 'hex'
//   }
// }

// Validate a Name Service domain
const nsResult = validateWalletAddress('vitalik.eth', {
  nsDomains: ['eth'],
  network: ['ns'],
});
console.log(nsResult);
// {
//   network: 'ns',
//   isValid: true,
//   description: 'Ethereum Name Service domain',
//   metadata: {
//     format: 'ens',
//     isSubdomain: false,
//     isEmoji: false
//   }
// }

// Validate with multiple options
const result = validateWalletAddress(
  'tb1qw508d6qejxtdg4y5r3zarvary0c5xw7kxpjzsx',
  {
    network: ['btc'],
    testnet: true,
    enabledLegacy: false,
  },
);
console.log(result);
// {
//   network: 'bitcoin',
//   isValid: true,
//   description: 'Bitcoin Native SegWit address',
//   metadata: {
//     format: 'Native SegWit',
//     isTestnet: true
//   }
// }

API Reference

validateWalletAddress(address: string, options?: ValidationOptions): NetworkInfo

Validates a blockchain wallet address and returns information about the network it belongs to.

Parameters

• address (string): The wallet address to validate
• options (optional): Validation options
  • network (string[] | null): Networks to validate against. Default: null (validates all networks). Example: ['btc', 'eth']
  • testnet (boolean): Whether to validate testnet addresses. Default: false
  • enabledLegacy (boolean): Whether to validate legacy address formats. Default: true
  • emojiAllowed (boolean): Whether to allow emoji characters in NS domains. Default: true
  • nsDomains (string[]): List of Name Service domains to validate against. Default: []

Returns

Returns a NetworkInfo object containing:

• network (string): The identified blockchain network
• isValid (boolean): Whether the address is valid
• description (string): Human-readable description of the address type
• metadata (object): Additional information about the address
  • Properties vary by network type
  • May include format, checksum validation, testnet status, etc.

Supported Networks

Network	Address Format	Example
Algorand	Base32	VCMJKWOY5P5P7SKMZFFOCEROPJCZOTIJMNIYNUCKH7LRO45JMJP6UYBIJA
Bitcoin Cash	CashAddr	bitcoincash:qr7fzmep8g7h7ymfxy74lgc0v950j3r4ecr4wd9r3z
Bitcoin Legacy	Base58 (1...)	1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2
Bitcoin Native SegWit	Bech32 (bc1...)	bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf5mdq
Bitcoin SegWit	Base58 (3...)	3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy
Cardano	Bech32	addr1...
Core	ICAN	cb7147879011ea207df5b35a24ca6f0859dcfb145999
Cosmos	Bech32	cosmos1yw6g44c4pqd2rxgrcqekxg9k8f4fd8xpx2k8c3
ENS	name.ns	vitalik.eth
EVM	Hex (0x...)	0x4838B106FCe9647Bdf1E7877BF73cE8B0BAD5f97
Litecoin Legacy	Base58 (L...)	LaMT348PWRnrqeeWArpwQPbuanpXDZGEUz
Litecoin Native SegWit	Bech32 (ltc1...)	ltc1qgpn2phk8c7k966xjkz0p5zkf5w7rzeslwj42h
Litecoin SegWit	Base58 (M...)	MJRSgZ3UUFcTBTBAaN38XAXvHAaZe6TMbM
Polkadot	SS58	1FRMM8PEiWXYax7rpS6X4XZX1aAAxSWx1CrKTyrVYhV24fg
Ripple	Base58	rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh
Solana	Base58	DRpbCBMxVnDK7maPM5tGv6MvB3v1sRMC86PZ8okm21hy
Stellar	Base32	GBQMXVTR5HQNRGXPR4ZPBOZR7VQXOQMEQMZWIVLIW2MYBXC2HQWZZ4VJ

Performance

• Bundle size: < 10KB minified + gzipped
• No runtime dependencies except:
  • bs58check: For Bitcoin address validation
  • ethereum-cryptography: For EVM checksum validation
• No Buffer dependency (works in modern browsers without polyfills)
• Tree-shakeable: Only imports what you use
• Zero configuration required

Browser Support

• All modern browsers (Chrome, Firefox, Safari, Edge)
• IE11 not supported

Development

# Install dependencies
pnpm install

# Run tests
pnpm test

# Run tests with coverage
pnpm test:coverage

# Build the package
pnpm build

# Check bundle size
pnpm size

# Analyze bundle
pnpm analyze

# Format code
pnpm format

# Lint code
pnpm lint

License

Licensed under the CORE License.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Environment

• 🌐 Browser: Works directly in all modern browsers, no Node.js required
• 📦 Node.js: Optional - v18+ recommended if using in Node environment
• 📥 Package Manager: If using Node.js, recommended:
  • pnpm (v8.10.0+)
  • npm or yarn are also supported

Security

This package helps validate the format of blockchain addresses but does not guarantee the security or ownership of the addresses. Always verify addresses through multiple sources before sending any transactions.

Changelog

See CHANGELOG.md for release history.

Credits

Created and maintained by Sergiy Dybskiy.