multichain-crypto-wallet/src/services/wallet/index.ts

A Multichain crypto wallet library that supports Ethereum, Bitcoin, Solana, Waves and other EVM compatible blockchains E.g. Binance Smart Chain, Polygon, Avalanche etc.

import * as bip39 from 'bip39';

import bitcoinHelper from '../../common/helpers/bitcoinHelper';
import ethereumHelper from '../../common/helpers/ethereumHelper';
import solanaHelper from '../../common/helpers/solanaHelper';
import wavesHelper from '../../common/helpers/wavesHelper';
import tronHelper from '../../common/helpers/tronHelper';

import {
  TransferPayload,
  BalancePayload,
  CreateWalletPayload,
  GetAddressFromPrivateKeyPayload,
  GenerateWalletFromMnemonicPayload,
  GetTransactionPayload,
  GetWalletFromEncryptedjsonPayload,
  GetEncryptedJsonFromPrivateKey,
  IGetTokenInfoPayload,
  ISmartContractCallPayload,
  Network,
} from '../../common/utils/types';

const networkHelpers: Record<Network, any> = {
  ethereum: ethereumHelper,
  solana: solanaHelper,
  tron: tronHelper,
  waves: wavesHelper,
  bitcoin: bitcoinHelper,
  'bitcoin-testnet': bitcoinHelper,
};

const baseFeatures = [
  'createWallet',
  'getAddressFromPrivateKey',
  'generateWalletFromMnemonic',
  'getBalance',
  'transfer',
  'getTransaction',
];

const supportedFeatures = {
  ethereum: [
    ...baseFeatures,
    'getEncryptedJsonFromPrivateKey',
    'getWalletFromEncryptedJson',
    'getTokenInfo',
    'smartContractCall',
  ],
  solana: [...baseFeatures, 'getTokenInfo'],
  bitcoin: [...baseFeatures],
  'bitcoin-testnet': [...baseFeatures],
  waves: [
    ...baseFeatures.filter(feature => feature !== 'getAddressFromPrivateKey'),
    'getTokenInfo',
    'smartContractCall',
  ],
  tron: [...baseFeatures, 'getTokenInfo', 'smartContractCall'],
};

function getNetworkHelper(network: Network) {
  const helper = networkHelpers[network];
  if (!helper) {
    throw new Error(`Unsupported network: ${network}`);
  }

  return helper;
}

function isFeatureSupported(network: Network, feature: string): boolean {
  return supportedFeatures[network]?.includes(feature) || false;
}

function generateMnemonic(numWords: number = 12): string {
  const strength = (numWords / 3) * 32;

  return bip39.generateMnemonic(strength);
}

function getAddressFromPrivateKey(args: GetAddressFromPrivateKeyPayload) {
  try {
    if (!isFeatureSupported(args.network, 'getAddressFromPrivateKey')) {
      throw new Error(
        `getAddressFromPrivateKey is not supported for ${args.network}`
      );
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.getAddressFromPrivateKey(args.privateKey);
  } catch (error) {
    throw error;
  }
}

function generateWalletFromMnemonic(args: GenerateWalletFromMnemonicPayload) {
  try {
    if (!isFeatureSupported(args.network, 'generateWalletFromMnemonic')) {
      throw new Error(
        `generateWalletFromMnemonic is not supported for ${args.network}`
      );
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.generateWalletFromMnemonic(
      args.mnemonic,
      args.derivationPath
    );
  } catch (error) {
    throw error;
  }
}

function createWallet(args: CreateWalletPayload) {
  try {
    if (!isFeatureSupported(args.network, 'createWallet')) {
      throw new Error(`createWallet is not supported for ${args.network}`);
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.createWallet(args.derivationPath);
  } catch (error) {
    throw error;
  }
}

async function getBalance(args: BalancePayload) {
  try {
    if (!isFeatureSupported(args.network, 'getBalance')) {
      throw new Error(`getBalance is not supported for ${args.network}`);
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.getBalance({ ...args });
  } catch (error) {
    throw error;
  }
}

async function transfer(args: TransferPayload) {
  try {
    if (!isFeatureSupported(args.network, 'transfer')) {
      throw new Error(`transfer is not supported for ${args.network}`);
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.transfer({ ...args });
  } catch (error) {
    throw error;
  }
}

async function getTransaction(args: GetTransactionPayload) {
  try {
    if (!isFeatureSupported(args.network, 'getTransaction')) {
      throw new Error(`getTransaction is not supported for ${args.network}`);
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.getTransaction({ ...args });
  } catch (error) {
    throw error;
  }
}

async function getEncryptedJsonFromPrivateKey(
  args: GetEncryptedJsonFromPrivateKey
) {
  try {
    if (!isFeatureSupported(args.network, 'getEncryptedJsonFromPrivateKey')) {
      throw new Error(
        `getEncryptedJsonFromPrivateKey is not supported for ${args.network}`
      );
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.getEncryptedJsonFromPrivateKey({ ...args });
  } catch (error) {
    throw error;
  }
}

async function getWalletFromEncryptedJson(
  args: GetWalletFromEncryptedjsonPayload
) {
  try {
    if (!isFeatureSupported(args.network, 'getWalletFromEncryptedJson')) {
      throw new Error(
        `getWalletFromEncryptedJson is not supported for ${args.network}`
      );
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.getWalletFromEncryptedJson({ ...args });
  } catch (error) {
    throw error;
  }
}

async function getTokenInfo(args: IGetTokenInfoPayload) {
  try {
    if (!isFeatureSupported(args.network, 'getTokenInfo')) {
      throw new Error(`getTokenInfo is not supported for ${args.network}`);
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.getTokenInfo({ ...args });
  } catch (error) {
    throw error;
  }
}

async function smartContractCall(args: ISmartContractCallPayload) {
  try {
    if (!isFeatureSupported(args.network, 'smartContractCall')) {
      throw new Error(`smartContractCall is not supported for ${args.network}`);
    }

    const helper = getNetworkHelper(args.network);

    if (!helper) {
      throw new Error('Invalid network');
    }

    return helper.smartContractCall({ ...args });
  } catch (error) {
    throw error;
  }
}

export {
  generateMnemonic,
  getAddressFromPrivateKey,
  generateWalletFromMnemonic,
  createWallet,
  getBalance,
  transfer,
  getTransaction,
  getEncryptedJsonFromPrivateKey,
  getWalletFromEncryptedJson,
  getTokenInfo,
  smartContractCall,
};