eddmann’s gists

eddmann / keybase.md

Created May 15, 2018 21:51

I hereby claim:

To claim this, I am signing this object:

eddmann / bitcoin-merkle-proofs.js

Created November 10, 2017 10:20

Bitcoin Internals: Verifying Merkle Roots using Merkle Proofs in JavaScript

	const fetchLatestBlock = () =>
	fetch(`https://blockchain.info/q/latesthash?cors=true`)
	.then(r => r.text());

	const fetchMerkleRootAndTransactions = block =>
	fetch(`https://blockchain.info/rawblock/${block}?cors=true`)
	.then(r => r.json())
	.then(d => [d.mrkl_root, d.tx.map(t => t.hash)]);

	const random = arr =>

eddmann / bitcoin-merkle-tree.js

Last active July 24, 2023 13:55

Bitcoin Internals: How Blocks use Merkle Trees in JavaScript

	const fetchLatestBlock = () =>
	fetch(`https://blockchain.info/q/latesthash?cors=true`)
	.then(r => r.text());

	const fetchMerkleRootAndTransactions = block =>
	fetch(`https://blockchain.info/rawblock/${block}?cors=true`)
	.then(r => r.json())
	.then(d => [d.mrkl_root, d.tx.map(t => t.hash)]);

	const toBytes = hex =>

eddmann / handler.js

Created November 7, 2017 13:32

Scheduled Start/Stop of EC2 Instances using Lambda and Serverless (Extra)

	'use strict';

	const AWS = require('aws-sdk');

	module.exports.stateChange = (event, context, callback) => {
	const { state, id, region } = event;

	const ec2 = new AWS.EC2({ region });

	ec2[`${state}Instances`]({ InstanceIds: [id] }).promise()

eddmann / handler.js

Created November 6, 2017 13:34

Scheduled Start/Stop of EC2 Instances using Lambda and Serverless

	'use strict';

	const AWS = require('aws-sdk');

	module.exports.start = (event, context, callback) => {
	const ec2 = new AWS.EC2({ region: event.region });

	ec2.startInstances({ InstanceIds: [event.id] }).promise()
	.then(() => callback(null, `Successfully started ${event.id}`))
	.catch(err => callback(err));

eddmann / modify-ec2-instance-type.js

Created November 3, 2017 15:32

Scheduled EC2 Instance Type Modification using Lambda and CloudWatch Events

	// Demonstration video can be found at: https://youtu.be/_gJyK1-NGq8

	// ModifyEC2InstanceType

	const AWS = require('aws-sdk');

	exports.handler = (event, context, callback) => {
	const { instanceId, instanceRegion, instanceType } = event;

	const ec2 = new AWS.EC2({ region: instanceRegion });

eddmann / start-stop-ec2-instances.js

Created November 3, 2017 14:00

Scheduled Start/Stop of EC2 Instances using Lambda and CloudWatch Events

	// Demonstration video can be found at: https://youtu.be/roAerKVfq-Y

	// StopEC2Instance

	const AWS = require('aws-sdk');

	exports.handler = (event, context, callback) => {
	const ec2 = new AWS.EC2({ region: event.instanceRegion });

	ec2.stopInstances({ InstanceIds: [event.instanceId] }).promise()

eddmann / index.html

Created March 28, 2015 13:36

JS Bin // source http://jsbin.com/vosiye

eddmann / SecureSessionHandler.php

Created April 9, 2014 12:18

Secure session handler implementation.

	<?php

	class SecureSessionHandler extends SessionHandler {

	protected $key, $name, $cookie;

	public function __construct($key, $name = 'MY_SESSION', $cookie = [])
	{
	$this->key = $key;
	$this->name = $name;

eddmann / oop.js

Last active April 28, 2016 08:38

OOP in JavaScript

	// Prototypical Model

	var UserPrototype = {};
	UserPrototype.constructor = function(name)
	{
	this._name = name;
	};
	UserPrototype.getName = function()
	{
	return this._name;

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