Ian Tan iantanwx

Notes: More Viable Plasma

More Viable Plasma was proposed by Kelvin Fichter. Essentially, it modifies:

the priority queue, to process exits of transactions with the oldest youngest input first. This is very much mind fuckery, but it will be explained in detail below.
the exit game, wherein even inputs of non-canonical transactions can be exited. The game is also extended to a 2-phase process.

Root Chain (RC): refers to a smart contract on the Ethereum (or any other general compute blockchain with a Turing-complete VM).
Plasma Chain (PC/Operator): refers to Campfire (in our case). The Plasma Chain is where most of the action happens. Its blocks are compressed and recorded on the RC's smart contract.
Validator Nodes (Vals): a set of nodes that have the privilege to propose

	BaseType = base:(Map/Uint/String) _* "(" vtypes: (type:VType _* {return type})* ")" { return { base: base, vtypes: vtypes }}
	VType = Uint/String
	Map = "Map"
	Uint = "Uint"
	String = "String"
	_ = [ \t\n]

	interface Animal {
	play(arg: Toy): Toy;
	}

	interface Dog extends Animal {
	type: 'dog';
	}

	interface Cat extends Animal {
	type: 'cat';

	/**
	* Since this is a test, I implemented everything in vanilla JS
	* There are no depencies, although I would otherwise have looked to use lodash or immutable for this type of algorithm
	* That did cause it to take little longer to solve, but it was a good exercise ^^
	*/
	'use strict';

	function sum(array) {
	var sum = 0;

	<?php
	function getPrimes($n) {
	// throw an exception if $n is not an int or <= 1
	if (!is_int($n) \|\| $n <= 1) { throw new Exception("Input must be of type int and > 1", 1); }

	$primes = array(2);

	// if $n == 2 just return $primes
	if ($n == 2) { return $primes; }

	SELECT date AS day,
	COUNT(CASE WHEN score >= 0.00 THEN 1 ELSE NULL END) AS num_pos_scores,
	COUNT(CASE WHEN score < 0.00 THEN 1 ELSE NULL END) AS num_neg_scores
	FROM assessments
	WHERE is_date >= STR_TO_DATE('2011-03-01', '%Y-%m-%d')
	AND is_date <= STR_TO_DATE('2011-04-30', '%Y-%m-%d')
	GROUP BY DATE(date);

	SELECT date AS day
	FROM assessments

	Homebrew build logs for weechat on macOS 10.14
	Build date: 2018-10-09 14:26:14

	# Forwarded GIF_NAME as a query string

	RewriteEngine On
	RewriteRule ^(midlet\|wap\|ajax\|touch)\/gift\/([0-9]+)_(\w+)\/([0-9]+)\/([0-9]+)? /gift.php?view=$1&gift_id=$2&gif_name=$3&sender_id=$4&receiver_id=$5

	#!/bin/bash

	# Get count
	ps aux \| grep [h]ttpd -c

	# Rename files
	find mig33/inner.folder -name *.txt -exec bash -c 'echo "$0" "${0%.txt}.data"' {} \;