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CoinsCheck

A multi-network library for checking cryptocurrency wallet balances with support for a wide range of blockchains.

Supported Networks

• EVM (Ethereum, BSC, Polygon, etc.)
• Bitcoin
• Litecoin
• Dogecoin
• Cardano
• Cosmos
• Monero
• Polkadot
• Solana
• TON
• TRON

Installation

npm install @yaring/coinscheck

Key Features

• Balance checks across various blockchain networks
• Provider caching for performance optimization
• Address validation for all supported networks
• Informative error handling
• TypeScript support

Usage Examples

Basic Usage

const { BalanceChecker } = require('@yaring/coinscheck');
const checker = new BalanceChecker({
  timeout: 30000 // optional, timeout in ms
});

// Single network balance check
const chain = {
  chainId: '1',
  rpc: 'https://eth-mainnet.public.blastapi.io',
  chainType: 'EVM',
};

const balance = await checker.checkSingleChainBalance(
  '0x742d35Cc6634C0532925a3b844Bc454e4438f44e',
  chain
);
console.log(balance);
// {
//   chainId: '1',
//   balance: '1000000000000000000',
//   chainType: 'EVM'
// }

Multi-network Balance Check

const balances = await checker.checkBalances([
  {
    address: '0x742d35Cc6634C0532925a3b844Bc454e4438f44e',
    chain: {
      chainId: '1',
      rpc: 'https://eth-mainnet.public.blastapi.io',
      chainType: 'EVM',
    },
  },
  {
    address: 'DRpbCBMxVnDK7maPM5tGv6MvB3v1sRMC86PZ8okm21hy',
    chain: {
      chainId: 'solana-mainnet',
      rpc: 'https://api.mainnet-beta.solana.com',
      chainType: 'SOLANA',
    },
  },
]);

Address Validation

const { AddressValidator } = require('@yaring/coinscheck');

// EVM address validation
const isValidEvm = AddressValidator.validateAddress(
  '0x742d35Cc6634C0532925a3b844Bc454e4438f44e',
  'EVM'
);

// Solana address validation
const isValidSolana = AddressValidator.validateAddress(
  'DRpbCBMxVnDK7maPM5tGv6MvB3v1sRMC86PZ8okm21hy',
  'SOLANA'
);

API Reference

Class BalanceChecker

Constructor

new BalanceChecker(options?: {
  timeout?: number; // timeout in milliseconds, default is 30000
});

Methods

checkSingleChainBalance(address: string, chain: Chain): Promise<Balance>

Checks the balance for a single address in a specified network.

interface Chain {
  chainId: string;
  rpc: string;
  chainType: string;
  name?: string;
  nativeDenom?: string; // for Cosmos-based networks
}
interface Balance {
  chainId: string;
  balance: string;
  chainType: string;
  error?: string;
}

checkBalances(items: CheckItem[]): Promise<Balance[]>

Checks balances for an array of addresses across different networks.

interface CheckItem {
  address: string;
  chain: Chain;
}

dispose(): void

Releases resources and closes connections to providers.

Class AddressValidator

Static Methods

validateAddress(address: string, chainType: string): boolean

Validates the address format for a given network type.

validateAddressFormat(address: string, chainType: string): boolean

Checks if the address matches the regular expression for the specified network type.

getAddressExamples(): Record<string, string>

Returns examples of valid addresses for each network type.

getTestAddresses(): Record<string, { valid: string[], invalid: string[] }>

Provides sets of valid and invalid addresses for testing.

Supported Address Formats

• EVM: 0x[0-9a-fA-F]{40}
• Solana: [1-9A-HJ-NP-Za-km-z]{32,44}
• Cosmos: [chain-prefix]1[a-zA-Z0-9]{38}
• Bitcoin: (1|3|bc1)[a-zA-HJ-NP-Z0-9]{25,62}
• Polkadot: [1-9A-HJ-NP-Za-km-z]{47,48}
• TRON: T[A-Za-z1-9]{33}
• TON: (?:EQ|UQ)[a-zA-Z0-9_-]{48}

Error Handling

The library provides informative error messages for each network:

try {
  const balance = await checker.checkSingleChainBalance(address, chain);
} catch (error) {
  console.error(error.message);
  // Example messages:
  // "EVM balance check failed: invalid response from RPC"
  // "Solana balance check failed: invalid address"
  // "TRON balance check failed: network error"
}

License

MIT

Let me know if you need further adjustments!