1st Nxt Slot Machine!

[Come-from-Beyond]

1st Nxt Slot Machine

How it works:

1. Send from 10 to 1000 NXT to [DELETED]
2. Wait for 1 confirmation
3. Look at the last 3 digits of the block id that confirmed the bet

4. If 2 of these digits are the same then you get 3x amount back. If all 3 digits are the same then you get 10x! If you lose you'll get 1 NXT.

Winnings are paid from [DELETED] every 2 minutes.

House can run out of money, so before making a bet check that http://88.198.210.245:7876/?request=getBalance&account=3994117300242888518 shows at least "1000000" in "unconfirmedBalance"!

DISABLED

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[kylie.v]

Tried it oute

Sent about 12 transactions ..no luck :/

[Come-from-Beyond]

Tried it oute

Sent about 12 transactions ..no luck :/

As the 1st player u get all ur coins back. I'll send them in a min.

[kylie.v]

Thank you still willing to test my luck

[klee]

Nice to have something to gamble with Nxt!
 I wil try it 

[eid]

House can run out of money......

ROFL, good one. 

[Come-from-Beyond]

but i am facing the same problem here, you can't put workload on this, as soon you do, the client freeze.

What do u mean "the same"? I see nothing about API problems in this thread. Check that u work with 0.2.7 version.

[Come-from-Beyond]

same in context to freeze. don't know how often i restarted a freezed client the last 24h.

test it yourself, traverse (getBlock) from genesis block (2680262203532249785) up to the current one on your local machine and see what happen.
just one connection with 1.000 repetitive request and your node is gone. this workload is normally nothing and every node should handle this easily.

My gambling service doesn't store any data. Every 2 minutes it scans the whole blockchain and sends winnings. It even sets deadline to 1 minute, so usualy it take several times to send a transaction, coz it expires before confirmation. Make sure u use the recent version which is 0.2.9 (https://dl.dropboxusercontent.com/u/67242472/Nxt.zip).

[Come-from-Beyond]

For those who may be interested here is the source code of my Slot Machine:

Code:

// (c) 2013 Come-from-Beyond

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashSet;

public final class Tri {
	
	public static void main(String[] args) {
		
		while (true) {
			
			System.out.println("Time = " + System.currentTimeMillis());
			
			try {
				
				Thread.sleep(120000);
				
			} catch (final Exception e) {
				
				return;
				
			}
			
			try {
				
				final ArrayList<Bet> bets = new ArrayList<>();
				final HashSet<String> payments = new HashSet<>();
				
				String block = "2680262203532249785"; // This is the genesis block id
				
				while (true) {
					
					String blockData = sendRequest("getBlock&block=" + block);
					
					int i = blockData.indexOf("\"transactions\":[");
					String transactions = blockData.substring(i + 16, blockData.indexOf("]", i));
					while (transactions.length() > 0) {
						
						final String transaction = transactions.substring(1, transactions.indexOf("\"", 1));
						final String transactionData = sendRequest("getTransaction&transaction=" + transaction);
						
						// Beginning of the game logic
						i = transactionData.indexOf("\"sender\":\"");
						final String sender = transactionData.substring(i + 10, transactionData.indexOf("\"", i + 10));
						i = transactionData.indexOf("\"recipient\":\"");
						final String recipient = transactionData.substring(i + 13, transactionData.indexOf("\"", i + 13));
						
						if (recipient.equals("4427320429393039971")) {
							
							i = transactionData.indexOf("\"amount\":");
							final int amount = Integer.parseInt(transactionData.substring(i + 9, transactionData.indexOf(",", i + 9)));
							
							if (amount >= 10 && amount <= 1000) {
								
								bets.add(new Bet(block, transaction, amount, sender));
								
							}
							
						} else if (sender.equals("3994117300242888518")) {
							
							i = transactionData.indexOf("\"referencedTransaction\":\"");
							final String referencedTransaction = transactionData.substring(i + 25, transactionData.indexOf("\"", i + 25));
							payments.add(referencedTransaction);
							
						}
						// End of the game logic
						
						if (transaction.length() + 3 > transactions.length()) {
							
							break;
							
						}
						transactions = transactions.substring(transaction.length() + 3);
						
					}
					
					i = blockData.indexOf("\"nextBlock\":\"");
					if (i < 0) {
						
						break;
						
					}
					block = blockData.substring(i + 13, blockData.indexOf("\"", i + 13));
					
				}
				
				// Beginning of the game logic
				for (final Bet bet : bets) {
					
					if (!payments.contains(bet.transaction)) {
						
						final String request = "sendMoney&secretPhrase=REMOVED&recipient=" + bet.sender + "&amount=" + getAmount(bet) + "&fee=1&deadline=1&referencedTransaction=" + bet.transaction;
						System.out.println(request);
						System.out.println(sendRequest(request));
						
					}
					
				}
				// End of the game logic
				
			} catch (final Exception e) {
				
				System.out.println(e.toString());
				
			}
			
		}
		
	}
	
	public static int getAmount(final Bet bet) {
		
		final String digits = bet.block.substring(bet.block.length() - 3);
		final int digit0 = Integer.parseInt("" + digits.charAt(0));
		final int digit1 = Integer.parseInt("" + digits.charAt(1));
		final int digit2 = Integer.parseInt("" + digits.charAt(2));
		
		if (digit0 == digit1 && digit0 == digit2) {
			
			return bet.amount * 10;
			
		}
		
		if (digit0 == digit1 || digit0 == digit2 || digit1 == digit2) {
			
			return bet.amount * 3;
			
		}
		
		return 1;
		
	}
	
	public static String sendRequest(final String request) throws Exception {
		
		final HttpURLConnection connection = (HttpURLConnection)(new URL("http://localhost:7876/?request=" + request)).openConnection();
		final BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
		final String response = reader.readLine();
		reader.close();
		connection.disconnect();
		
		return response;
		
	}
	
	public static final class Bet {
		
		final String block;
		final String transaction;
		final int amount;
		final String sender;
		
		public Bet(final String block, final String transaction, final int amount, final String sender) {
			
			this.block = block;
			this.transaction = transaction;
			this.amount = amount;
			this.sender = sender;
			
		}
		
	}
	
}

It uses only Nxt blockchain, no need to store anything locally.

Pay attention that it uses "referencedTransaction". If a betting transaction cancelled due to blockchain reorganization, then the transaction that pays winning will be cancelled as well.

[nexern]

thanks for sharing.

looks like i am to many hours in front of my computer. my previous post was for the nxt main thread, not for your game thread.
have to reduce my browser-tabs.

from your source (i am not a java coder) i can see you are parsing the blockchain file directly?
are there any specs about the internal storage format?

[Come-from-Beyond]

thanks for sharing.

looks like i am to many hours in front of my computer. my previous post was for the nxt main thread, not for your game thread.
have to reduce my browser-tabs.

from your source (i am not a java coder) i can see you are parsing the blockchain file directly?
are there any specs about the internal storage format?

No, I don't parse the file. I use HTTP API and get JSON data back. Then I just parse JSON by myself, without a JSON library.

[nexern]

ok, thanks, will update to 0.2.9 and test again.

[bahamapascal]

Hmmm, send 12 nxt, but did not even get one singel nxt back

[Come-from-Beyond]

Hmmm, send 12 nxt, but did not even get one singel nxt back

Ur bet lost, my script is trying to send 1 NXT but it's connected only to a few nodes and mining nodes don't see it. This is a great possibility to investigate what happens, so I don't restart the client. Eventually u'll get this coin anyway.

[bahamapascal]

Hmmm, send 12 nxt, but did not even get one singel nxt back

Ur bet lost, my script is trying to send 1 NXT but it's connected only to a few nodes and mining nodes don't see it. This is a great possibility to investigate what happens, so I don't restart the client. Eventually u'll get this coin anyway.

OK, cool....I don´t worry about the loss, just wantet to let you know

[Come-from-Beyond]

I will leave the script working for the night. If it crashes I'll launch it next morning and u'll get ur winnings. U can easily check if u won by looking at the last 3 digits of the block id.

[dr_yan_yan]

well atleast the 1 coin comes back if you lose.

[dr_yan_yan]

and, i lost many.
BUT
then i sent a 10, it had a 99 in there, and it paid me 30.

So the scrypt works.
But I am not quite sure about the chances of winning.

[Come-from-Beyond]

and, i lost many.
BUT
then i sent a 10, it had a 99 in there, and it paid me 30.

So the scrypt works.
But I am not quite sure about the chances of winning.

Chance is 28% (27% for 3x and 1% for 10x)

[dr_yan_yan]

Lose 410... to win 30  hehe  gambling sure sucks!

[Come-from-Beyond]

Lose 410... to win 30  hehe  gambling sure sucks!

Agree. But this helps to test how Nxt network works.

[dr_yan_yan]

Ok, did it again ... this time it was Block  2390!


hmmmm but no payout yet...

[klee]

I just send 9nxt to test it - I got 3 confirmations but I can't find the block!

[Come-from-Beyond]

I just send 9nxt to test it - I got 3 confirmations but I can't find the block!

U won't get anything anyway.

1. Send from 10 to 1000 NXT to 4427320429393039971

[klee]

I just send 9nxt to test it - I got 3 confirmations but I can't find the block!

U won't get anything anyway.

1. Send from 10 to 1000 NXT to 4427320429393039971

Damn! lol

But where is the block anyway?

[Come-from-Beyond]

Use http://87.230.14.1/nxt/nxt.cgi?action=1 to find ur transaction

[klee]

Send 10 more and lost 

[dr_yan_yan]

Ok, did it again ... this time it was Block  2390!


hmmmm but no payout yet...

Sometimes it shows that the payment is being sent, and then it disappears.
is this because of the expiration time?

[Come-from-Beyond]

Ok, did it again ... this time it was Block  2390!


hmmmm but no payout yet...

Sometimes it shows that the payment is being sent, and then it disappears.
is this because of the expiration time?

Yes, and the scipt can't send all payments at once. I see 300 NTX and 240 NXT pending.

[dr_yan_yan]

ok so I am winning some.
But none of them are paying out.
It looks like it trys, but if it does not complete within 1 minute  (which most dont)... then it does not send.

[But it seems to always be able to send the 1NXT  losing refund]

Block;   Bet Amount
2424     160
2416     80
2390     100

[Come-from-Beyond]

ok so I am winning some.
But none of them are paying out.
It looks like it trys, but if it does not complete within 1 minute  (which most dont)... then it does not send.

[But it seems to always be able to send the 1NXT  losing refund]

Block;   Bet Amount
2424     160
2416     80
2390     100

It's just coincidence that it sends only 1 NXT. One of the winning payments already confirmed. Be patient plz, Nxt API seems to be working unstable.

[Come-from-Beyond]

@ the guy who is martingaling right now:

Don't forget that only bets in the range from 10 to 1000 NXT are accepted!

[dr_yan_yan]

I am happy to be patient.

I am just trying to keep it busy. Help to find flaws etc.

[dr_yan_yan]

My Bet of 320 was in Block  2445...
Block 2446 = 777........  NOOOOO  (created only 4 seconds apart)

haha

[Come-from-Beyond]

My Bet of 320 was in Block  2445...
Block 2446 = 777........  NOOOOO  (created only 4 seconds apart)

haha

Wow! U almost caught the luck!

[dr_yan_yan]

its ok.
Block 2449... Bet = 999   

( i was scared to actually bet 1000, just in case it needs to be LOWER than that figure)

[Come-from-Beyond]

its ok.
Block 2449... Bet = 999    

( i was scared to actually bet 1000, just in case it needs to be LOWER than that figure)

1000 is allowed. But if u bet 1000 the block id would be different.

Edit: U won last bet in that martingale row, congrats! Don't forget to check I have enough money to pay (http://88.198.210.245:7876/?request=getBalance&account=3994117300242888518) before betting.

[inkadnb]

Hmmm, send 12 nxt, but did not even get one singel nxt back

Ur bet lost, my script is trying to send 1 NXT but it's connected only to a few nodes and mining nodes don't see it. This is a great possibility to investigate what happens, so I don't restart the client. Eventually u'll get this coin anyway.

How do you know what is a "mining" node?

[Come-from-Beyond]

How do you know what is a "mining" node?

Any node with an unlocked account is a mining node.

[inkadnb]

http://87.230.14.1/nxt/nxt.cgi?action=2000&tra=2291158848699347223

never got my 1 NXT back.

[Come-from-Beyond]

http://87.230.14.1/nxt/nxt.cgi?action=2000&tra=2291158848699347223

never got my 1 NXT back.

Sorry. The script crashes quite often, I've restarted it.

[Drexme]

Is this up?

[Come-from-Beyond]

Is this up?

Now it's up. Hm, API disabled. It's down.

In a couple of days API should be enabled and all coins paid.

[Drexme]

Is this up?

Now it's up. Hm, API disabled. It's down.

In a couple of days API should be enabled and all coins paid.

I sent 100 nxt 2 days ago. I haven't gotten any form of compensation
here is the transaction: http://87.230.14.1/nxt/nxt.cgi?action=2000&tra=3469769040151476974

Edited wrong link

[Come-from-Beyond]

Is this up?

Now it's up. Hm, API disabled. It's down.

In a couple of days API should be enabled and all coins paid.

I sent 100 nxt 2 days ago. I haven't gotten any form of compensation
here is the transaction: http://87.230.14.1/nxt/nxt.cgi?action=2000&tra=3469769040151476974

Edited wrong link

Sorry. API request to send money is disabled yet. Today I'm going to fix it and launch my payment script. I can't do it manually, coz interface doesn't allow to set referenced transaction. U'll get ur coins soon.

[Come-from-Beyond]

I launched the script. Please, let me know if u don't get all the payments within next 60 minutes.

[Drexme]

I launched the script. Please, let me know if u don't get all the payments within next 60 minutes.

Recieved payment

[slavo]

Is this normal ? I understand shit sorry 

[Come-from-Beyond]

Is this normal ? I understand shit sorry 

I see big amounts sent to the slot machine. Re-read the OP again plz.

[slavo]

Oh fuck, sorry 

[slavo]

So do I lose my coins ?  

[Come-from-Beyond]

So do I lose my coins ?  

If u sent amounts < 10 and > 1000 then yes. I would pay them back, but I don't want to create a precedent, sorry.

[slavo]

i sent 7000+2500+6000+12500+25000+12500  

i had a bug with the client, saying money sent but not showing transactions when i did this. I have desinstalled and reinstalled everything and it shows the transaction that's why.

This, and I am quite stoopid too so don't worry.

[Come-from-Beyond]

i sent 7000+2500+6000+12500+25000+12500  

i had a bug with the client, saying money sent but not showing transactions when i did this. I have desinstalled and reinstalled everything and it shows the transaction that's why.

This, and I am quite stoopid too so don't worry.

Ah, if that was a bug then I'll send u ur money back. A few mins plz, I'll prepare the transaction.

Edit: http://localhost:7874/nxt?requestType=getTransaction&transaction=10795958397222091185

[slavo]

Thanks a lot.

Nxt is doing great.

U should maybe delete the adress in the op. Noobs can be tempted to not read that it's disabled and send more coins.

Cheers