ENS domain btc

ens_btc.js

// EIP
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-2304.md#p2pkhversion
//
// Testing addresses
// https://github.com/ensdomains/address-encoder/blob/master/src/__tests__/index.test.ts#L16
//
// P2PKH case
//
// Stored bytes
// 76a91462e907b15cbf27d5425399ebf6f0fb50ebb88f1888ac
//
// Expected address
// 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa
//
// Resulting address
// 12NvYg7CXwVYtMDYia7n9viekJ6d5

const bs58 = require("bs58")

p2pkhBytes = Buffer.from("76a91462e907b15cbf27d5425399ebf6f0fb50ebb88f1888ac", "hex");
p2pkhAddr = bs58.encode(Buffer.concat([Buffer.from("00","hex"), p2pkhBytes.slice(3,3 + p2pkhBytes.readUInt8(2))]));

// Python version
// from base58check import b58encode
// b58encode(bytes.fromhex('0062e907b15cbf27d5425399ebf6f0fb50ebb88f18')).decode('utf-8')


// P2SH
// Stored bytes
// a91462e907b15cbf27d5425399ebf6f0fb50ebb88f1887
//
// Expected address
// 3Ai1JZ8pdJb2ksieUV8FsxSNVJCpoPi8W6
//
// Resulting address (not starting with 3)
// LDDFSe7ry9LK8TSz6sfgZ3FwzjMZ

p2shBytes = Buffer.from("a91462e907b15cbf27d5425399ebf6f0fb50ebb88f1887","hex");
p2shAddr = bs58.encode(Buffer.concat([Buffer.from("05", "hex"), p2shBytes.slice(2, 2 + p2shBytes.readUInt8(1))]));

// Python version
// b58encode(bytes.fromhex('0562e907b15cbf27d5425399ebf6f0fb50ebb88f18')).decode('utf-8')