Nfsw cash maker 1.1 activation code

Nfsw cash maker 1.1 activation code

Posted: Varnava Date of post: 30.06.2017

Note that privSeed is accessible by everybody as it is persisted on the blockchain. Just because there isn't a convenient JS mapping function for it exposed doesn't mean that it is really private. I think it's time to call your. Good thing you put one in or this would last forever taking people's money and allowing other people to take it from the contract.

I see that they could access all the block data. But I don't see how they would catch the Private Seed privSeed. Everything in the contract is public, so every node needs access to all data and code to verify that VM state is valid. Miners can predict results of your casino, because they know all variables.

So they can mine for blocks that meet conditions for their benefit. So my recommendation is that you should withdraw the balance of your contract or just wait if loosing ETH is ok for you.

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It will be actually interesting to see how fast someone will manage to modify miner to get your money. So if I bet among others within one block cycle then it's in general not possible to know if I was first or not and thus if the privSeed changed already or not. I agree that some few powerful miners could view the block data before publishing it, but in order to see the state of the privSeed they had to connect to some outside node taking up valuable ms's.

In my opinion in this specific case it wouldn't be profitable to risk losing the block reward for the chance of ETH.

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Can somebody clarify how one can see these contract variable-states? Are they really public or is there an internal generally 'unvisible' process involed EVM that handels these variable-states?

Just disassemble the program, you can then find out where is the variable storage, eth. I just recompile the program according to instruction in GitHub. If you use Optimize and if I get it right eth.

There is an easily accessible property for returning the block. I will try to create a generic random value generator in Solidiy tomorrow, could be useful in the standard library. Thinking about it again today, I think betting on block nonces will be far more dangerous on Ethereum than it is on Bitcoin. This message was created by a bot.

As advised, I reduced my ETH holdings as a casino to ETH. If somebody can crack the pseudo rand. Did you remove the ETH as well?

I was just working at actually trying to perform this attack. The example below, by luffintime is not an actual working attack, since it uses old block info. So, I'm currently experimenting with performing an evil mining-attack. But it appears that there's only 1. This by itself isn't totally secure because miners who lose significant sums on a bet, and happen to mine the relevant block, could abandon the block.

To fix this, have bettors submit hashes. After the relevant block, they submit the preimages. Validate the preimages against their hashes, XOR the block hash with the preimages, and use the result as your random number.

Anyone who doesn't submit a valid preimage automatically loses. There's still a slight risk if the bettors' preimages are predictable. You might want to harvest mouse movements or something. Don't use a long sequence of numbers from a simple RNG.

You could use Blum Blum Shub, not sure how slow that would be in javascript but at least it wouldn't be running on the blockchain. A better way to get random numbers is to pull them from block hashes. Solidity can access those. Actually, this is the best way. You just need to do it smartly. Here is how to do the best implementation of a random number generator:. Require that a bet or whatever is submitted now. Store that "now" state somehow. Then a "redeem" function would be called by the user.

This looks back on the past blocks and asks what their hash was, puts that into a function that messes with it using various math functions and preseeded number. In this way, your game is not secured by a single block hash but many block hashes.

This means you'd need to have colluded mining for many mined blocks. You could extend this for even a day of hashing and be really sure your number was random. That's an interesting idea. My paragraph after the one you quoted describes another fix, which would work even if all miners colluded indefinitely. But yours doesn't require the client to provide random numbers. Note that in the end a single miner is still in control to some degree. Lets say you do it in the way described - the user submits his bet and than the next 10 blocks determine the outcome.

As soon as 9 blocks are mined the 10th miner can still decide to withhold a block if that makes him loose. If the miner has significant hashrate and the stakes are high he still can make a profit. He even does not loos too much from his withhold block because it is still an uncle. So a miner can withhold a block but that only makes the outcome random again, not predictable.

Think about it this way: Now someone else can fine a block or you, but lets simplify - so it is random. If the casino has decent liquidity that is totally worth the difference between a block and an uncle reward. Feels like I would have to talk to a statistics major to know if this is right. In any case, they can't prevent the next block's hash from being random or very close to random. If you submit the block. So basically you can chose to be the winner or make it random.

Can can chose as often as your hashrate allows it. I suspect this will be the most common method. Still can be attacked like this: Obviously, leveraged bets make it worse. Also, important to remember that these attacks can be easily automated because all the information required is in the blockchain. In this case a house really doesn't know their exposure because all the wagers sharing nonces are interdependent. Was just thinking about the problem and thought that another way would be that each block hash just reduces the number of possible results: This way an individual miner has very little power, as you need consecutive blocks to decide an outcome.

But fundamentally the problem is that regardless of whatever system is used if people are betting on nonces there can be a time where the economically rational thing to do is cheat, because the people placing the interdependent wagers almost surely do not know about each other and will offer locally rational globally irrational wagers.

The worst part is, this is basically true forever, an attacker can buy a bunch of accounts that have lost wagers and then create an alternate chain where those wagers win. This is not practical on BTC for a number of reasons that don't apply to ETH.

The solution to this is to use oracles, I spent some time working with Consensys designing such a system, maybe they will release it one day. There are other fixes: Having secrets on the public chain is a fix, but is very slow. Check out my post for an example, there are some problems with this scheme, but it's fixable by using large security deposits or minimum bets. The last person to submit their preimage has double the chance of winning, because they can either choose to submit or not submit it, giving them a choice of two known outcomes.

The fix is either to invalidate the round if not everyone submits their preimage, or to require large security deposits that only get refunded if the player submits theirs. I have a working example here: That's why I said "anyone who doesn't submit a valid preimage automatically loses. Probably fair automatic roulette. Come on people with a "system" place your bets over k spins: An easy way to realize that miners can rip of this contract: While mining a new block they can just include a transaction they have not broadcasted and see if it wins.

If it does - fine, if not they can just use another number. This way they can easily empty the whole contract with one block. Hmmm, you emphasize on your website how the contract can be checked for authenticity, yet the check fails. Compiling your provided solidity file does not result in the binary that was deployed: I recently made a post here on the ethereum sub about coding games and another user directed me to this post.

A few years ago I tried to start an "Open Source Bitcoin Casino" project. I made this blog , but clearly it went nowhere. The technology wasn't there.

Is anyone else interested in collaborating on some very simple games? Some very basic betting games? Simple games between 2 people with bets involved eg. I'm just a n00b at ethereum, but I've got some coding skillz if people want to collaborate on some git repos. Use of this site constitutes acceptance of our User Agreement and Privacy Policy.

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NMR can only be earned through 'Proof of Intelligence" on Numerai.

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Can we make a mega thread for people to explain what's happening to ETH today? Alex Van de Sande's short cartoons explaining how Ethereum works to beginners. This is an archived post. You won't be able to vote or comment. Just read this thread about randomness in ETH: Is this currently possible? This message was created by a bot [Contact creator] [Source code].

It seems to be working as intended. Here is how to do the best implementation of a random number generator: P There are other fixes: Could the game network issue its own currency and fund itself as a decentralized casino? Posts are automatically archived after 6 months.

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