Ismail xd4rker

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xd4rker / GuessTheNewNumber.sol

Created April 16, 2018 17:05

	pragma solidity ^0.4.21;

	contract GuessTheNewNumberChallenge {
	function GuessTheNewNumberChallenge() public payable {
	require(msg.value == 1 ether);
	}

	function isComplete() public view returns (bool) {
	return address(this).balance == 0;
	}

xd4rker / guess.js

Created April 16, 2018 13:08

	web3.eth.getBlock('latest', function(e, r) {
	var data = {number: r.number, hash: r.hash, timestamp: r.timestamp };
	var sha3 = web3.sha3([data.hash.slice(2), (data.timestamp + 14).toString(16).padStart(64, "0")].join(''), {encoding: 'hex'});
	data.answer = parseInt(sha3.slice(-2), 16);
	contractInstance.guess(data.answer, {value: 1000000000000000000}, function(x, v) { })
	});

xd4rker / GuessTheNewNumberChallenge.sol

Created April 16, 2018 11:52

	pragma solidity ^0.4.21;

	contract GuessTheNewNumberChallenge {
	function GuessTheNewNumberChallenge() public payable {
	require(msg.value == 1 ether);
	}

	function isComplete() public view returns (bool) {
	return address(this).balance == 0;
	}

xd4rker / getAnswer.js

Created April 16, 2018 10:18

	var data = {};
	web3.eth.getBlock(3045393, function(err, res) {
	data.parentHash = res.parentHash;
	data.timestamp = res.timestamp;
	var answerHash = web3.sha3([res.parentHash.slice(2), res.timestamp.toString(16).padStart(64, "0")].join(''), {encoding: 'hex'})
	data.answer = parseInt(answerHash.slice(-2), 16);
	console.log(data);
	});

xd4rker / GuessTheRandomNumberChallenge.sol

Created April 15, 2018 09:37

	pragma solidity ^0.4.21;

	contract GuessTheRandomNumberChallenge {
	uint8 answer;

	function GuessTheRandomNumberChallenge() public payable {
	require(msg.value == 1 ether);
	answer = uint8(keccak256(block.blockhash(block.number - 1), now));
	}

xd4rker / crack_keccak256.js

Created April 14, 2018 18:29

	var answerHash = '0xdb81b4d58595fbbbb592d3661a34cdca14d7ab379441400cbfa1b78bc447c365';
	for(var i=0; i<2000; i++) {
	if(web3.sha3(i.toString(16), {encoding: 'hex'}) == answerHash) {
	console.log('Answer Found: ' + i);
	break;
	}
	}

xd4rker / Crack.sol

Created April 14, 2018 17:29

	pragma solidity ^0.4.21;

	contract Crack {
	uint8 public answer;
	bytes32 answerHash = 0xdb81b4d58595fbbbb592d3661a34cdca14d7ab379441400cbfa1b78bc447c365;

	function Crack() public {
	for(uint8 i = 0; i <= 2000; i++) {
	if(keccak256(i) == answerHash) {
	answer = i;

xd4rker / GuessTheSecretNumberChallenge.sol

Created April 14, 2018 15:58

Guess the secret number - capturetheether.com

	pragma solidity ^0.4.21;

	contract GuessTheSecretNumberChallenge {
	bytes32 answerHash = 0xdb81b4d58595fbbbb592d3661a34cdca14d7ab379441400cbfa1b78bc447c365;

	function GuessTheSecretNumberChallenge() public payable {
	require(msg.value == 1 ether);
	}

	function isComplete() public view returns (bool) {

xd4rker / Guess_the_number_solution.js

Created April 14, 2018 14:57

	var abi = [{"constant":false,"inputs":[{"name":"n","type":"uint8"}],"name":"guess","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"isComplete","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":true,"stateMutability":"payable","type":"constructor"}];
	var contract = web3.eth.contract(abi);
	var contractInstance = contract.at('0xeD108ab8e7436fAa61b55591262abE1FD2C2E4Cb');
	contractInstance.guess(42, {value: 1000000000000000000}, function(err, res) { });

xd4rker / GuessTheNumberChallenge.sol

Created April 14, 2018 11:49

Guess the number - capturetheether.com

	pragma solidity ^0.4.21;

	contract GuessTheNumberChallenge {
	uint8 answer = 42;

	function GuessTheNumberChallenge() public payable {
	require(msg.value == 1 ether);
	}

	function isComplete() public view returns (bool) {