laalaguer

pragma solidity >=0.5.3 <=0.6.4;

// Crowd contract allows users 
// to participate in a crowd funding in a limited time frame.

// Owner of the contract can decide:
// 1. Stop time of this round of crowd funding (using block.number).
// 2. If allow a user to deposit multiple times.
// 3. To which address withdraw the funds collected.

laalaguer

pragma solidity >=0.5.3 <=0.6.4;

contract Extension {
    function blake2b256(bytes memory data) public view returns(bytes32);
    function blockID(uint num) public view returns(bytes32);
    function blockTotalScore(uint num) public  view returns(uint64);
    function blockTime(uint num) public view returns(uint);
    function blockSigner(uint num) public view returns(address);
    function totalSupply() public view returns(uint256);
    function txProvedWork() public view returns(uint256);

laalaguer

# Python 3 Script
# Count the "real" code lines (exclude empty lines, and comments) in a project.
# Languages supported: Python, JavaScript, C, C++, Java, C#, etc....

# Analyse:
# A source code file contains code, and comments.
# Single line comments are easy. Just // or #
# Multi-line comments are begin usually with /*, and ends with */, this is
# accomplished with a stack, maybe. /* // */ counts as a single block of comments.

laalaguer

# Python3

# In 100 numbers, 
# Exactly has (n) numbers, that are <= value
# The possibility.
def f(n, value):
  a = 1 - value/100
  b = value/100

  # Numbers that are > 8

laalaguer

import random

foo = random.SystemRandom()

threshold = 8
at_least = 5

bingo = 0
experiment_times = 100000

laalaguer

/**
 * Attempt to commit a transaction to a contract.
 * 
 * With a hefty wallet as "sponsor" + an empty wallet as "sender".
 * 
 */
const fetch = require("node-fetch");
const cry = require('thor-devkit/dist/cry')
const Transaction = require('thor-devkit/dist/transaction').Transaction

laalaguer

// Fetch the sponsor signature.
const sponsorSignature = await getSponosrSignature(
    '0x'+originAddress.toString('hex'),
    txBody
)
    
// Compose a combined signature of user + sponsor.
const sig = Buffer.concat([
    originSignature,
    Buffer.from(sponsorSignature, 'hex')

laalaguer

const express = require('express')
const cry = require('thor-devkit/dist/cry')
const Transaction = require('thor-devkit/dist/transaction').Transaction

const app = express()
app.use(express.json())
const port = 3000

app.post('/', function(req, res) {

laalaguer

// HTTP function definition
async function getSponosrSignature(sender, txBody) {
    const url = 'http://localhost:3000/'
    const response = await fetch(url, {
        method: 'POST',
        headers: {
            'Accept': 'application/json',
            'Content-Type': 'application/json'
        },
        body: JSON.stringify({

laalaguer

// Import library
const cry = require('thor-devkit/dist/cry')
const Transaction = require('thor-devkit/dist/transaction').Transaction

// User private key.
const originPriv = Buffer.from(
    '2a0cbfe49ea7c18e89b87be4237e1717823fc16b52dc02e91fb30af122fba9b3',
    'hex'
)
// User public address: 0x881Ab2380017870C49a9A114806C05F3CFE406e2