Bitcoin Forum

so i want to create a fake transaction 1 that will go trough but will not get confiremd because its not real how can i do that?

you can use raw transaction command line to create an invalid transaction, it will be rejected by miner. I suppose.

Best to do this on testnet.

Go through where?

Any transaction that will be relayed by nodes could be confirmed.  If it is invalid, then nodes won't accept or relay it.  If it is valid, then miners might confirm it.

but i need it to go the the normal blockchain

Define fake.

so i want to create a fake transaction 1 that will go trough but will not get confiremd because its not real, how can i do that?

A valid transaction with zero transaction fee will probably sit around in the mempool for a long time. I don't think there's any way to guarantee that it won't get confirmed eventually (last 30 days mempool (https://blockchain.info/charts/mempool-count?timespan=30days), see Oct 26).

Then you need it to confirm.

If it is in the blockchain, then it is confirmed.  If it is not in the blockchain, then it is not confirmed.

That's what the word "confirm" means.


Go through where?

Any transaction that will go "through the bitcoin network" is a transaction that miners can confirm.  There is no way to guarantee that a miner won't confirm it.

Any transaction that is guaranteed not to confirm, will not go "through the bitcoin network".  That is how bitcoin works.

You'll need to explain what you are trying to do. It might not be possible.

Why u should do so ? i remember last year someone did the same to me and scammed me in almost 500$, you should not do that mate

i am not planing on scamming anyone

A bit of cross-talk here. As user DannyHamilton has explained, it is not possible for a "fake transaction" to be confirmed on the blockchain. That's the whole purpose of the blockchain and that is precisely why it is designed the way it is - so that fake, invalid, fraudulent, malformed, double-spend and any other kind of transaction, except a valid Bitcoin transaction, cannot be added into the blockchain.

Enlighten me ,for what it's transace need? Actually sounds like cheating people.

Give us more idea on what you will use this.

It smells bad.

what i an saying is that it will send fake btc and it wont get confirmed because they are fake if it gets confirmed idc but they proboly wont

i dont care if it gets saved in the blockchain i just want it to count like if i send it to an adress it will show up but because its fake it will just disappier because its invalid

This is not possible.

Any transaction that will go "through the bitcoin network" and "show up" is a transaction that miners can confirm.

Any transaction that is guaranteed not to confirm, will not go "through the bitcoin network" and will not "show up".

The process of "showing up" is identical to the process of being allowed to confirm. So, any transaction that is invalid enough that it can't "confirm" is also invalid enough that it can't "show up".

That is how bitcoin works.

you can do this on testnet.

People like you are the reason we need a trustless payment system like Bitcoin. The sense of BTC is to not having to trust someone in order to get a payment done.
If it would be possible to create a "fake transaction" which shows up.. but then does not "go through".. you would need trust to recieve payments.
So.. if you want to to scam people write an email telling them you send them 1 Million $ via mail if they send you 100 bucks via sepa,...
But don't even try to trick someone like this with btc payments. It just doesn't work.
I think printing money from your home printer is more of a "business" which suites you..

i dont want to scam anyone ffs i just wanted to know if it was possible i dont even care how i just wanted to know if thats somthing possible

Anyway, why do you have to ask such fake transactions then? It wouldn't be appropriate if someone read it though because it almost sounds like a scam is going to happen. I guess you should start to write with the right question about of this topic like, "Is there a way that someone could create a fake transactions?" or "Is it possible that someone could've just send you a fake transactions number?" Just something like that you know, it's just my opinion.

I don't think fake transaction would through miners because every transaction node you've made would be relayed on by the miners so that they can verify which is valid. It sounds rather suspicious to make those kind of transactions because you are like trying to deceive or trick someone with some kind of fake transaction sir, I don't meant any offense sir.

This is possible. Just define what do you mean by "it will show up"
If it means "it is visible on some block-explorer site" it is definitely possible.

Take this one for example:
https://blockchain.info/tx/ba8a7fb13a507a4987bfa267a6f12defc0d30216fdf6664cdc06cc4c8de71a84
This is fake transaction.

You could theoretically create a Transaction with a extremely low fee. This TX will show up in the mempools (and therefore also on block explorers).
Therefore you can create a transaction which will be shown online.. but never will go through because no miner will include your transaction into a block.
But you can't really make use of this. Because Transactions/deposits to any site will only be credited with 1+ confirmation.
A 0 Confirmation transaction is nowhere seen as a payments. Its like a "wish of a payment". Only after the confirmation (including into a block) this payment is being processed.

And to awnser your question once for all.. No, its not possible to create "fake transaction" as you are imagining.

Wait what the heck. NO.
Miners validate all transactions but the nodes wouldn't have relayed an invalid transaction in the first place. Mining isn't verifying transactions, strictly speaking. Please look your facts up before spamming.
It really depends on what is your definition of low. If the fee is 100satoshi/KB, it would almost certainly not show up anywhere other than your own wallet. Saying that miners won't include it into their block is also overgeneralisation. Of course they can include it, why not?

Wrong. Network relays even zero-fees transactions. They are standard.

Notice the use of qualifiers.

Bitcoin Core 0.15.0 has removed the coin age function. Free transactions being relayed to Bitcoin Core 0.15.0 nodes will no longer have it relayed to others, provided that nothing in the compiled copy has changed. Obviously, this differs from node to node. That being said, of course 0 fee transactions are standard. But with the current situation, it is almost impossible for it to be propagated well.

wrong. it is not "almost impossible". it is very easy.

Transactions with low fees will certainly get relayed. There may be a few nodes which specify which transactions will be relayed.
But the majority of the nodes relay transactions "whatever" fee they include.
Miner are profit orientated. Of course they can include a low fee tx instead of a transaction with a high fee.
But thats lost money. Miner usually include the highest (sat/B)fee transactions. Simply because it gives the most money.
But you are right, TX can be accelerated for free and thereby included by a miner (as a gesture of goodwill).

this is "Development & Technical Discussion"
and this question is very on-topic imho

Since I am more of a moralist, the question I would like to ask is why would you want to create a fake transaction in the first place without having a sinister motive. Even as a senior member, I don't know the existence of something like this which means I can still be duped thinking I got a transaction, send the goods then wait till eternity for it to confirm because my understanding is that once sent, it cannot be reversed.

Because it is very interesting to create something what others unable to create.
Painters draw pictures which nobody else can paint. Musicants write music.
Programmers create algorithms in computer language. Crypto-anarchists broadcast fake transactions.  ;D

Yes, I agree that this seems not safe to do. you may want to be safe, then sorry.

You have intention to harm or fraud someone. It not good for you. I hope no body help you.

Man its simple just use photo editor easy.

I suspect the same thing on which this kind of question would really give him an idea to scam people just telling the other person that he did able to pay the funds but the truth is its just an fake one. This is not possible because once a transaction is broadcasted into the network then it would really be gets confirmed by miners. Double spending situation are on rare cases which i did eventually experience back in previous week when i do make use of electrum even the fees are just on average the network didnt recognize it and yet i have to add fee which results on double spend.

This is possible.
For example: https://blockchain.info/tx/ba8a7fb13a507a4987bfa267a6f12defc0d30216fdf6664cdc06cc4c8de71a84
This is fake transaction. It can not be confirmed
Edit: it is not doublespend transaction either

I think you're talking about the double spend transaction . But double spend transaction is a trick using for scam, so i think you shouldn't try to know how to do it. Only know how to spot it for avoiding scam.

you can try testnet, it is suitable for your situation.

yeah this is what i wanted to know
how do you do it?

That address has a private key generated with a secret exponent of 0. As with that, the coins cannot confirm since the network does not see any transactions being generated by that address as valid.

That being said, the transaction SHOULD NOT have appeared anywhere in the first place. Any node without bugs would have rejected it and it wouldn't have appeared. The only reason why it has appeared is because Blockchain.info is quite full of bugs and they accept invalid transactions without checking first.

2 questions first did you lose the bitcoins you tried to send
second how do i replicate this

1. There were no bitcoins which could be lost because this TX is not valid.
2. You should learn to read. The post above your clearly mentioned it: That address has a private key generated with a secret exponent of 0.

I actually don't see why you wan't to create such a transaction. You won't be able to trick someone with that. This TX will get rejected everywhere.
But if you still want to create such a TX, then please read into it. Its not that hard.

I think that the question was: "is creating fake transaction free or one should spend real funds"
This depends...

This is clearly not truth :)

This is good answer.

you can try , creating tx with 0 fees and try pushing it to relay nodes. so any nodes accepting 0 fees tx will accept it.,

but this wont qualify as fake tx, its just real tx with no fees, so it will take time to confirm.

how can i do it tough?

There are at least two possibilities:
a) Learn math, programming, bitcoin, blockchain, etc. In ten years you will be able to do it.
b) Pay to somebody and ask to do this job for you.

It's very simple: create transaction without comission. With 0 sat/byte. It has a chance to be not confirmed (before it will be deleted from mempool).
there also some more comlicated ways. Ask "Amaclin" he can create transaction with 100 bitcoins which will never be confirmed.


Here this guy.

i dont know how i do it do i use a program or what?

Very interesting idea. I think thousands people have thought about it and tested for millions of times.

But you won't get through the first full node before spreading out to others. Each node of bitcoin network will verify the delivered transaction using the full blockchain. If the transaction breaks the rule, the node(could be miner) will not include it into its block, otherwise it will be refused by any peer miners and the sender miner will get paid with nothing.

go to any online tx creator .e.g  https://brainwalletx.github.io/#tx

set fee 0.00 i.e. output = input

enter input address and output address.,

both can be same, it does not matter. ,and push your tx hex to relay nodes.,  amacilin has shared , tool to push tx to nodes using just ips list., you need to use that. try looking in old threads.

good luck

What is the reason you want to this,because I don't help scammers..

Hi
I am going to open a online store and I have to test the bitcoin api, therefore I do need this feature sending unconfirmed transaction (create fake transactions)
Brainwallet is not working for me.

There is a program named BTCtxGen which is for sale, but seems to be a fake.

Is there somebody who can help me please.

But why on earth should you create a fake transaction?

No idea on fake transactions.

I got some coins from somebody but that is still unconfirmed in blockchain.info.
How can i find out that it is not fake?
Any place for checking validation of transactions without bug?

What do you mean?
You mean a transaction without fee is fake and the sender spent nothing until a miner confirmed it?

Fairly confident that in your case you want to test/debug your system using the testnet not the mainnet. Sounds like you want "real" transactions, but in a no risk environment

Further details of the previously mentioned fake tx are described also here:

https://bitcoin.stackexchange.com/questions/65969/invalid-public-key-was-spent-how-was-this-possible

That discussion on SE is not "details". It is "nonsense".

I dont know why someone could need that for a non-cheating purpose, but maybe I am wrong. Can you enlighten me?

Hahaha yeah right... then why you want to create a fake TX ? to send someone a fake tax and accept other currency .. ?

Could "fake" transactions be created to increase blockchain traffic such that the Bcash guys would love to do to bitcoin core Or  attack bitcoin network as "Deny of Service" ??

but why do you need to create it? sorry, if i didnt noticed the answer

If you mean fake transactions as indicated in the OP, to the best of my knowledge, it's not possible. There are a number of checks it must go through before the transaction is moved to another. This particular transaction is bound to fail such checks.

But if you mean fake transactions where smaller amounts with lower transaction fee are created to increase the blockchain traffic as a form of denial-of-service attack against bitcoin by the Bcash guys then its possible.