Bitcoin Forum

We are announcing BitDoubler: https://www.bitdoubler.io/

BitDoubler is an open source web site for double spending bitcoins. There are a bunch of similar sites out there already. But ours is different in that, first of all, it's open source, and second we charge a fee of only 0.0002 btc (about 80 cents) per double spend. Some of the other sites charge as much as 10% of your total transaction amount!

Lots of information is on the web site FAQ, so we won't unnecessarily repeat it here.

Please let us know if you have any feedback.

Why did you make such a site? The only real usecase is to scam other cryptocurrency users, thinking you are paying them while you really aren't. This kind of stuff is what destroys bitcoin, and cryptocurrency.

I don't want to sit on some moral high-grounds, but this will only hurt new people in the bitcoin community.

Also, i could send transactions to myself on your site for some reason? is this a bug?..

https://i.gyazo.com/5de3c16f4aca8fd7f35e6f62251eae90.png

It seems your ill-intentions have been confirmed. I'd be surprised if this works at most bitcoin casinos nowadays though.

Can I double my bitcoins? Please suggest how to do this.

First, just install a wordpress theme into your website, or as the ads are on youtube, you can use WIX.com .

Second, it is not ok to have a btcdoubler after segwit? Am  I right? As far as  I know at a moment they were fighting to combat the possibility of double spend. I don't if they succeed or not.

Anyways I hope you will have success with your html :)

Just another scam ...

They are definetely a scam. I just read all their info on their website, basically they are teaching users how to scam using double spend. People should report them and mark their account as scam I think

AdolfinWolf, thanks for your feedback. In response to your post:

1. We created the https://www.bitdoubler.io site to allow people an easy and cheap way to create double spends. We weren't happy with the existing double spend sites out there, such as the most popular one: https://www.glasshunt.co/exploits/bitcoin-double-spend, for a number of reasons. The Glass Hunt site charges a high fee (10% of your double spend amount) and has a high minimum (0.015 btc) amount to send. So we created a cheaper, open-source version that only charges a flat fee of 0.0002 btc and has a low 0.001 btc minimum.

2. We understand what you're saying about the immorality of double spending. Some may consider this site immoral because it can be used to fool people. We will leave it up to each individual person to decide if he or she wants to participate in double spending.

3. Not sure what you mean by "i could send transactions to myself on your site for some reason? is this a bug?." If you mean that you can put the same bitcoin address for both the first transaction and second transaction then you are correct. This is not a bug, but rather an option. If you were to send both the first and second transactions of a double spend to the same address then it would appear that the destination address would be receiving double the amount of bitcoins. This is an option we make available to users.

4. You are correct that most casinos have added double spend protections to their web sites recently. As explained in the FAQ, profiting through double spending would probably only work against new gambling sites that have not anticipated or prepared for double spend situations.

dumbtool45,

Thanks for your feedback. In response:

1. You said "First, just install a wordpress theme into your website, or as the ads are on youtube, you can use WIX.com". Why do you suggest adding a wordpress theme to the site? In order to improve its visual appeal?

2. You said "Second, it is not ok to have a btcdoubler after segwit? Am  I right? As far as  I know at a moment they were fighting to combat the possibility of double spend. I don't if they succeed or not." I'm not sure of the answer to that. Maybe someone else can answer that.

3. You said "They are definetely a scam. I just read all their info on their website, basically they are teaching users how to scam using double spend. People should report them and mark their account as scam I think" I would disagree that we are a scam. The web site is a tool that people might use to scam people, but the web site itself is not a scam. Meaning that the web site will work as advertised. If you create a double spend on the web site it will in fact execute the double spend (rather than just keeping your money, as a real scam web site would).

That #1 and #2 response is super fishy. #1 being the super low fee. There is no reason for you to create a site where people can double spend for so cheap. It seems as if you will take advantage of your members by asking them to put in their money for double spending and then taking it. No one will want to try it right off the bat.

Secondly, you state that it's up to the person for whether or not they want to double spend. It's my contention that there is no good reason for double spending. All of it has to do with scamming and I don't believe this website was a good creation.

player514,

You are wise to be cautious about sending your btc into any new web site. The owners of the site could very well keep the money and not provide you the service they promised.

The minimum transaction amount of bitdoubler.io is only 0.001 btc. Add in the 0.0002 btc bitdoubler fee and a transaction fee of around 0.0009 btc and you could risk as little as 0.002 btc (less than $10) to test the site.

In fact, if anyone wants a free 0.003 btc to test the site with, just let us know. You can use your own bitcoin wallet addresses as the two double spend addresses and keep the money you tested with.

Right, but my point is that you have the option of allowing smaller transactions at the beginning and when you start getting larger transactions for, let's say, 1 BTC, you have every opportunity to stop the script from continuing. You can simply take the money and run. You don't have much of a history here and there's no reason to trust you. After all, this product is promoting black hat means anyway...

player514,

You are correct. There are selective scams and exit scams. Sometimes a web site will work perfectly fine if you send it 0.01 btc. Then you might feel confident and send it 1 btc and it will keep your money. Or sometimes a web site will work perfectly for months or years and then suddenly close down and take everyone's bitcoins with it. Many bitcoin mixers, gambling sites, and darknet markets have pulled these scams. Always best to be cautious with your coins.

why youre use domain same with gambling site bitdouble.io
if only ponzi, youre wrong section if created thread in service announcement section

Quontoloue,

Our web site is not the same domain. Our domain is https://www.bitdoubler.io/ (notice the r on the end).

I have been reading and investigating on these bitcoin doublers since the first doubler came in market and every review is an advisory of safety toward scams.
You will see no one can suggest to invest in doublers as they are particularly came into existance to scam people.

Now this is what we need on Bitcointalk, to fool other Bitcoin users!

The only feedback I have fortoh is that the site smells scam because there is nothing like bitcoin doubler the only one I know is when you engage in gambling activities and in that, you know what you are putting your money into even before you start. But this is not anywhere practicable and I wish those who wants to get double try it out and lose the little you have.

This is bullsh*t thing seriously. What kind of project or site is this? Aiming for double spending? Fooling other people that you had paid and its not actually fun.I didn't think off that this thing is even possible.
I can consider it as a scam. I wont ever tried this thing even if its working.

I've give them negative trust.

Anyone who tries to scam other people (they clearly state it on their website), deserve to have a negative trust. This website deserves absolutely no traffic.

TheCoinFinder and olubams,

I think you are misunderstanding what the site is. It is not an investment / gambling site that promises to "double your money" after a certain time. It is a web site that allows you to create bitcoin double spends. You can read up on that here:

https://bitcoin.stackexchange.com/questions/4974/what-is-a-double-spend

i use your bitdoubler with shapeshift btc to monero

send first transaction, now shapeshift have check mark for Waiting on Confirmations, now I do second tranaction for double spend and I get free monero?

rollorspin,

I don't use Shapeshift so I am not sure at what stage in the process you would want to initiate the second transaction. I think ShapeShift would be tough to fool, though, because they got hit by a double spend attack 2 years ago and are probably much smarter about protecting themselves now.

https://blog.blockcypher.com/yes-someone-double-spent-bitcoin-no-zero-confirmation-payments-are-not-dead-944d021b865e?gi=86c0d40f09ec

I tried your "web tool" since that's what you call it. It may have done a double spend but i fail to see how i now have 'double" the bitcoins. What I did...

1. Sent 0.001 BTC to duckdice (since it's on your FAQ).
2. It let me bet my 0.001 before confirmation (hopes are high at this point)
3. Bet lost (big surprise...who heard of that casino...might be a scam casino)
4. Sent second transaction back to me; it confirmed in 10 mins

So now I have doubled my money? No, I have the same bitcoins I began with, minus 0.0001 BTC that your "tool" charges, and minus my transaction fee too.

Hardly feel rich now.

No, this site doesn't create to double your bitcoin instantly, you have to make it by yourself and what he has to offer?
Double spending bitcoins is fun and might even fool some person or web site into giving you something for free.

To deceive, scam People or sites in order to get free bitcoin or goods, but I won't recommend anyone to deal with this site as you will turn as scammers, criminal and being hunted by central authorities or some people who want your head on the table.

throwawaytest8721, the point is that if you bet, lose, and then double-spend your coins back to yourself then you have made a "free bet" and have the opportunity to bet again later, and maybe win next time.

For you to even patronise the service means that you must have believed that there is a way to double your coins but in the real sense, there is nothing like that but just a way to rob people. The only means of doubling your money is either to work harder, or take more risks or even buy more. Other than that, there is no other means of doubling your investments that does not point to scams.

I wasn't trying to rob anyone, just to test a new service to see if it worked. I did it on the lowest amount (0.001 BTC) so the casino is not  going to be hurt by that loss.

So, you agree that yours is a phishing site then. Shouldn't that bother us? I think it should. Why pick a dormain name almost like another popular site if it isnt for a sinister engagement? Perhaps that is to hoodwink and ensnare unsuspecting public to your nest, right? Wake up dude, people are not that daft anymore.

These kind of shitty scam attempts and site should be banned by everyone. These kind of the services will show the bad impression to the people who wish to get inside the bitcoin. Kindly ignore this thread until the moderator delete this thread. Bad to see in this section.

Mpamaegbu,

My understanding is that a phishing site attempts to fool users into thinking they are on a different site, while in fact they are on an illegitimate copy of that site. If you go to our site https://www.bitdoubler.io/ and then go to the other site https://bitdouble.io/ you will see the two sites have nothing to do with each other. https://bitdouble.io/ advertises itself as a "Social Gambling Game" while our site advertises itself as a tool for allowing users to execute bitcoin double spends.

A dice betting web site X by my testing was vulnerable to double spends (under 0.01 BTC)..I am white hat; I returned the funds and notified X of their vulnerability

throwawaytest8721,

Yesterday, a certain btc casino changed its instant deposit policies. Could this be because of your report? If you don't want to post the name of the casino in this thread could you send it to me privately?

And what do you exped it's a fucking double tip url I have used it and it's works great you can beat 0.001 in some casinos for 0.0001 go to google and search double expend beacuse it whats this site does
and whereas glashunt cost 10% of 0.015 minimun which is 0.0015 this is 0.0001

Edymola,

Thanks for your feedback. I'm glad to hear you had some success using our site!

You know you guys are directly aiding people to scam other people and services, right?
These kinds of services aren't really helping anyone. What's the point of double spending a transaction anyway?
For sure you guys have something like "this is for educational purposes only", which actually translate to,
"this is a scam tool and highly illegal" like most hacks, cheats, and scams posted on the internet.

I have heard a lot about bitcoin doubling sites that they are all scams. Anyways I will try your site and see. So to try your site should I need to register in any gamblinhg site? If so can you pm me the url of the casino site where your tool works properly or I can choose any gambling site? After trying your site, I will write a detail review about your site here.

Luan,

We don't have any kind of disclaimer like "this is for educational purposes only". We plainly state that our site is a tool for creating double spends and give suggestions regarding how double spends might be used to one's advantage. Apparently you did not look at our site very closely before giving your opinion.

Fire Rabbit,

When you say "I have heard a lot about bitcoin doubling sites that they are all scams" you might be thinking of "investment" sites that promise to double your money after a certain amount of time if you deposit it into the site's wallet. Our site is not a phony "investment" site, but rather a site that allows users to create double spends. It is up to the users themselves to find a way to benefit from double spends.

We can't guarantee double spends will work against any given casino. Edymola, who posted earlier, seems to have found a casino that is vulnerable. But he/she didn't specify which one. Another user posted earlier in this thread about notifying a certain casino of its vulnerability to double spends, and that casino has likely tightened up its policies on unconfirmed deposits.

If you want to test the functionality of the site you can always create a double spend where both transactions pay to different addresses in your own wallet. As far as finding a way to profit from double spends we offer some suggestions on our site, but can't offer guarantees of success against any particular site.

This is bad  idea to help other people to learn how to double spend and scam someone that actually not a good habit..
It can be bad result for bitcoin users if you are let other people to use this just to scam someone..
The purposes of this are same getting the benefits of the fee and help to scam others But honestly still none trying to test this service and see if this is real or not.
Since its only 10k sat fee i think there are someone will try it and prove this site are useless and scam..
For now we will wait for  other can sacrifice some their bitcoin just to prove but i hope they don't transact a big amount. .

The problem is that this service (unfortunately) is not a scam site. As long it conserns the service that they claim that they provide.
About the ethics/morality of it imo it's a disgrace for our community.
We came here for the better and not for the worse,these kind of "services" have no intension to promote and lift up BTC/crypto to people.
I know that a negative from me don't make something but i will do it. Afterall as Op said,it's up to us to judge if we want to fool others or to like something.
Well,i don't like this! Crystal clear!


Indeed... :'(

WTH is this? Are you really advocating and advertising and announcing DOUBLE SPENDING !?. Here in this Forum? Really!?
The Hell man, if you are part of the bitcoin community who supports bitcoin, you will do this, this is really stupid. I just hope there will be no member of this forum and also a bitcoin enthusiast please do not support this kind of activity.

crairezx20,

We would be happy to send 0.003 btc to you to test our site...you can double spend between two of your own wallet addresses and keep the btc when done testing.

cannot get to work for >= 0.01 BTC on shapeshift please advise, not worth it for low amount

rollorspin,

Some sites limit the amount they will accept as an instant deposit (0 confirmations) in order to reduce losses from double spending.

Doublespending is another word for scamming. Not sure what your rationale is for developing such a site but what you are encouraging here is plain wrong. As you can see above, there is someone attempting to doublespend a Shapeshift transaction. In other words, he probably wants to gain twice of what is supposed to be a single-value once-off transaction.

A bitcoin payment is supposed to be one which can't be manipulated or reversed. The idea of doublespending is grounded on the premise of successfully spending some money more than once, blatantly contradicting the most basic expectation of bitcoin being an irreversible and final transaction. Doublespending will always lead to some kind of loss or damage. Not sure why you are happily and positively encouraging it here.

 

warningsigns,

The double spending problem would not be a problem at all if everyone followed the advice of the creators of bitcoin and did not trust unconfirmed transactions. However, some web sites have ignored this rule in an attempt to increase their profits by not making users wait for transactions to confirm before providing them with a service (such as betting, crytocurrency exchange, etc.).

The Glass Hunt double spend site (https://www.glasshunt.co/exploits/bitcoin-double-spend/) has been around for more than a year. All we have done with bitdoubler.io is to make a similar site that is open source, cheaper to use, and that has a lower minimum (so that users can risk less when trying out our site).

Peter Todd (one of the bitcoin core developers) has been advocating for an end to trusting unconfirmed transactions. He announced the success of his own double spend attack (https://www.coingecko.com/buzz/peter-todd-explains-how-he-double-spent-coinbase) and even published its python source code (https://github.com/petertodd/replace-by-fee-tools/blob/master/doublespend.py).

We are simply offering a service that works at the expense of others who unwisely trust unconfirmed transactions.

this is not Money Doubler site

Use site to make double spends and read up on what that is

Yes rollorspin you are correct! Thank you for posting.

diffcult to find sites where double spend works > $100 USD

what to use for fee now for first tx? btc fees low now so first tx confirm too fast, troubles making money now

Unable to connect

Firefox can’t establish a connection to the server at www.bitdoubler.io.    :(