This typescript library encodes and decodes address formats for various cryptocurrencies.

Text-format addresses are decoded into their native binary representations, and vice-versa. In the case of Bitcoin-derived chains, this means their scriptPubKey; for Ethereum-derived chains this is their hash.

This library was written for use with EIP 2304, but may be useful for anyone looking for a general purpose cryptocurrency address codec.

npm install --save @ensdomains/address-encoder

import { formatsByName, formatsByCoinType } from '@ensdomains/address-encoder';

const data = formatsByName['BTC'].decoder('1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa');
console.log(data.toString('hex')); // 76a91462e907b15cbf27d5425399ebf6f0fb50ebb88f1888ac
const addr = formatsByCoinType[0].encoder(data);
console.log(addr); // 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa

This library currently supports the following cryptocurrencies and address formats:

• BTC (base58check P2PKH and P2SH, and bech32 segwit)
• LTC (base58check P2PHK and P2SH, and bech32 segwit)
• DOGE (base58check P2PKH and P2SH)
• MONA (base58check P2PKH and P2SH)
• DASH (base58check P2PKH and P2SH)
• ETH (checksummed-hex)
• ETC (checksummed-hex)
• RSK (checksummed-hex)
• XDAI (checksummed-hex)
• XRP (base58check-ripple)
• BCH (base58check and cashAddr; decodes to cashAddr)
• BNB (bech32)
• XLM (ed25519 public key)

PRs to add additional chains and address types are welcome.