kingsleyh

Smart Assets Spec

Summary

A smart asset is an entity which models a digital or real world item and is embedded into the blockchain. If we take the example of a game asset such as a sword we can model its attributes and behaviour in code which when invoked will execute the code and apply the logic.

Smart assets are defined in code and expose a set of external API's that can be invoked by the caller. Both the data that is created by the smart asset and the companion code is stored immutably in the blockchain within versioned transactions. When the code for the smart asset needs to mutate any of the associated data it creates transactions with the updated data and the latest version number. The fast transaction system is essential to make this possible.

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1. when user invokes the asset via the API then all the work it does should be atomic and either succeed in it's entirety of fail with the appropriate message. This includes if the asset invokes other assets.

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def self.verify2(hex_public_key : String, message : String, r : String, s : String)
    pkey = LibECCrypto.EVP_PKEY_new()

    # Create a EC key structure, setting the group type from NID
    eccgrp_id = LibECCrypto.OBJ_txt2nid("secp256k1")
    raise "Error could not set EC group" unless eccgrp_id != 0
    myecc = LibECCrypto.EC_KEY_new_by_curve_name(eccgrp_id)
    raise "Error could not create curve" if myecc.null?

    # convert binary public key to point

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class Job
  def self.create(number_of_jobs : Int32) : Array(Job)
    jobs = [] of Job
    inbound = Channel(String).new
    outbound = Channel(String).new

    number_of_jobs.times do |_|
      job = Job.new(inbound, outbound)
      job.run
      jobs << job

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    def start_workers(difficulty, block)
      @workers = MinerWorker.create(@num_processes)
      @workers.each do |w|
        spawn do
          loop do
            break unless w.can_run
            nonce_found_message = w.receive.try &.to_s || "error"

            debug "received nonce #{nonce_found_message} from worker"

kingsleyh

require "crsfml"
require "entitas"

# ---- domain ----
module Domain
  struct Dimension
    property rows : Int32
    property cols : Int32

    def initialize(@rows, @cols); end

kingsleyh

#!/bin/bash

# Chrome Repo
sudo apt-get install fonts-liberation xdg-utils libxss1 libappindicator1 libindicator7
wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
sudo dpkg -i google-chrome*.deb

sudo apt-get update

# Download