josephros’s gists

josephros / tokenvalue-etherest.js

Last active November 17, 2018 17:31

Query ETHEREST for tokenvalue demo script data

	try {
	var [name, symbol, decimals, balance] = await Promise.all([
	token.name(),
	token.symbol(),
	token.decimals(),
	token.balanceOf(argv[1])
	]);
	} catch (err) {
	throw "Could not get required data from token contract";
	}

josephros / tokenvalue-coinmarketcap-get.js

Last active August 22, 2017 15:08

Get basic ticker info from a token contracts name/symbol using the coinmarketcap.com API

	async function getTokenPriceData (symbol, name) {
	symbol = symbol.toLowerCase();
	name = name.toLowerCase();

	let tickers = await request('https://api.coinmarketcap.com/v1/ticker/', {
	json: true
	});

	return _.find(tickers, function (ticker) {
	var tickerSymbol = ticker.symbol.toLowerCase();

josephros / index.html

Last active December 12, 2018 09:51

Ethereum Token Balance Explorer

	<!DOCTYPE html>
	<html>
	<head>
	<title>Ethereum Token Balance Explorer</title>

	<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/web3.min.js"></script>
	<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
	</head>
	<body>
	<h1>Ethereum Token Balance Explorer</h1>

josephros / index.js

Created August 13, 2017 17:43

Update the interface with the results

	var percentOwned = balance.div(totalSupply).mul(100);

	var divisor = new web3.BigNumber(10).toPower(decimals);
	totalSupply = totalSupply.div(divisor);
	balance = balance.div(divisor);

	var results = '<b>Token:</b> ' + name + '<br />';
	results += '<b>Total supply:</b> ' + totalSupply.round(5) + '<br /><br />';
	results += accountAddress + ' owns ' + balance.round(5) + ' which is ' + percentOwned.round(5) + '% of the total supply';

josephros / index.js

Last active August 13, 2017 17:41

Query ERC20 token

	// 1. get the total supply

	token.totalSupply.call(function (err, totalSupply) {

	// 2. get the number of decimal places used to represent this token

	token.decimals.call(function (err, decimals) {

	// 3. get the name of the token

josephros / erc20.js

Last active November 17, 2018 17:42

ERC20 ABI for NodETH Tutorial

josephros / index.html

Last active August 13, 2017 17:59

Token Balance Explorer Form Template

	<!DOCTYPE html>
	<html>
	<head>
	<title>Ethereum Token Balance Explorer</title>

	<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/web3.min.js"></script>
	<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
	</head>
	<body>
	<h1>Ethereum Token Balance Explorer</h1>

josephros / index.html

Last active August 13, 2017 17:06

web3 enabled html page

	<!DOCTYPE html>
	<html>
	<head>
	<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/web3.min.js"></script>
	</head>
	<body>
	<script>
	// create a web3 object connected to our NodETH node
	var web3 = new Web3(new Web3.providers.HttpProvider("<node rpc url>"));
	</script>

Joe josephros