bitcoingoldjs-lib/src/address.js

A javascript library for Bitcoin Gold.

var sha256 = require('sha256');
var RIPEMD160 = require('ripemd160');
var base58check = require('base58check');

var P2PKH_ADDRESS_VERSION = '26';
var P2SH_ADDRESS_VERSION = '17';

function toKeyHash(address){
	try{
		var addr = base58check.decode(address, 'hex');
		return new Buffer(addr.data, 'hex');
	}catch(e){
		return null;
	}
}

function validateAddress(address){
	try{
		var addr = base58check.decode(address, 'hex');
		return addr.prefix === P2PKH_ADDRESS_VERSION || addr.prefix === P2SH_ADDRESS_VERSION;
	}catch(e){
		return false;
	}
}

function fromPubKey(pubkey){
	var keyHash = hash160(pubkey);
	return base58check.encode(keyHash, P2PKH_ADDRESS_VERSION, 'hex');
}

function fromRedeemScript(redeemScript){
	var keyHash = hash160(redeemScript);
	return base58check.encode(keyHash, P2SH_ADDRESS_VERSION, 'hex');
}

function hash160(data){
	return new RIPEMD160().update(Buffer.from(sha256(data, { asBytes: true }))).digest();
}

module.exports = {

	fromPubKey: fromPubKey,
	fromRedeemScript: fromRedeemScript,
	validateAddress: validateAddress,
	toKeyHash: toKeyHash

};