How possible can this be and if possible how can it be effectively detected?

hosseinimr93

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Quote from: hd49728 on August 15, 2023, 09:16:56 AM

Transaction hash is on blockchain and it can not be faked as to have a transaction hash, your trade partner have to broadcast it to the blockchain and wait for confirmations from miners.

We don't broadcast transactions to the blockchain. We broadcast transactions to the nodes.
Once nodes receive a transaction, they check if it's valid. If it's valid, they put it in their mempool and broadcast it to other nodes. Transactions are finally included in the blockchain by miners.

hd49728

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Quote from: Good_Doctor on August 14, 2023, 03:29:19 AM

I was going through some recent history and transactions in a platform and then it crossed my mind that some complaints were being made about unreflected payment and transaction id were being sent to show proof and then these person's later got credited.
But I ask, is it possible to fake a transaction ID and still be undetected?
Can a fake txn ID be detected in any way effectively?

If you have addresses of sender, receiver and a transaction hash (txid), it is enough to check and verify information you get from either sender or receiver, your trade partner is correct or just a lie.

Transaction hash is on blockchain and it can not be faked as to have a transaction hash, your trade partner have to broadcast it to the blockchain and wait for confirmations from miners. If transaction is confirmed, it is nearly can not be reverted.

hosseinimr93

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Quote from: Good_Doctor on August 15, 2023, 12:00:43 AM

Can you please tell me more about this opt-in RBF if you have links please share how does it work. Is there a post as regards this if available share link

Bitcoin transactions can be flagged as RBF (replace by fee). With flagging a transaction as RBF, as long as the transaction is unconfirmed, you will be able to replace it with a new one including at least one same input and paying higher fee.
If the original transaction hasn't been flagged as RBF, almost all nodes will reject any transaction having the same input as the non-RBF transaction that they have in their mempool, even if the replacing transaction pays a much higher fee.
For more details on the requirements that the replacing transaction should meet, you can read BIP125.

If a node has enabled "Full RBF", they will accept to replace transactions with a new one paying higher fee even if the original transaction hasn't been flagged as RBF.
Currently, most of the nodes are using the "opt in RBF" policy and they haven't still enabled "full RBF". It's expected that more and more nodes will enable "full RBF" in the future.

joniboini

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Quote from: Good_Doctor on August 15, 2023, 12:00:43 AM

Can you please tell me more about this opt-in RBF if you have links please share how does it work. Is there a post as regards this if available share link

There are many sources if you search with the keyword "opt-in RBF" through search engines. Basically, it allows you to replace your transaction with a new transaction with a different fee. You can also scroll around this forum since some topics do discuss it like this one[1].

[1] https://bitcointalksearch.org/topic/what-is-rbf-in-and-how-do-you-know-that-transaction-doesnt-use-rbf-5265729

Good_Doctor

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Quote from: hosseinimr93 on August 14, 2023, 07:58:06 AM

Of course, I am not saying you should accept an unconfirmed transaction, if it has not been flagged as RBF. There is no guarantee that an unconfirmed transaction will be finally confirmed.

Can you please tell me more about this opt-in RBF if you have links please share how does it work. Is there a post as regards this if available share link

I want to reply the user above this my reply not the person I'm tagging now please understand...I don't know why you text with a negative mindset but mind you I've not been online for days and I don't want to give details of the platform that I am in that mentioned this and it prompted me to asking more about it so that I too will not be a victim so please I'm not having intentions to scam anyone I'm not a fool who's obsessed about money and wouldn't care how the money comes I won't defraud any man my life is above such ways take it or leave it my intention is to bring this to the notice of all and if the solution is available we should all learn!

Please back to you please thank you for this I need to know more about the RBF the working principle I'll search about it though in my free hours

Thanks to all who've shared links one way or the other your responses are appreciated sincerely

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Quote from: Good_Doctor on August 14, 2023, 03:29:19 AM

I was going through some recent history and transactions in a platform and then it crossed my mind that some complaints were being made about unreflected payment and transaction id were being sent to show proof and then these person's later got credited.

When did those complaints happen and where?
If you were reading those in your history I'm pretty sure you can post the links here.

Quote from: Good_Doctor on August 14, 2023, 03:29:19 AM

but if a detector is available would be nice we know about it and it will reduce scam payment by detecting real payments through txn ID

Yeah, it's called a node, It has been available since the beginning of Bitcoin and there are a few thousands of them online 24/7 validating every tx and rejecting any bogus one!

Now, I have to ask both you and the other guys who might read this topic, what's with the influx of discussions about fake transactions, I've recently seen three topics about this stuff and I have a feeling all these "inquiries" are from people that are actually planning on using such a thing, which is obviously a scam taking your real BTC and promising you you can send unlimited fake ones.

This whole stuff is just way too fishy to be a pure coincidence!

hosseinimr93

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Quote from: Abu-Naim on August 14, 2023, 08:42:09 AM

Blockchain is a public chain that everyone will be able to see the transaction because all the bitcoin transaction that is been broadcasted is stored there,

This is not true.
The blockchain includes transactions that have been confirmed, not all the transactions that have been broadcasted. When you broadcast a transaction, nodes that have received your transaction will put it in their mempool and once your transaction is included by a miner, it's recorded on the blockchain.

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Quote from: Good_Doctor on August 14, 2023, 03:29:19 AM

I was going through some recent history and transactions in a platform and then it crossed my mind that some complaints were being made about unreflected payment and transaction id were being sent to show proof and then these person's later got credited.
But I ask, is it possible to fake a transaction ID and still be undetected?

Which platform are you talking about like if that platform is based on blockchain technology then yes you can track the status of that transaction and once the transaction is made it can not be tampered with. Because in blockchain one can fake the TX but not the ID because each transaction have different ID and if the person sends you a ID then that transaction is publicly viewable and you can see the status and details like how much amount that TX have.

That's the beauty of BTC blockchain that, if one try to fake things out that TX can not be confirmed and validated by Validators instead that will be marked. Or if not marked then at least one could confirm by seeing the details by searching the transaction ID on Explorer.

Abu-Naim

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Quote from: Good_Doctor on August 14, 2023, 03:29:19 AM

I was going through some recent history and transactions in a platform and then it crossed my mind that some complaints were being made about unreflected payment and transaction id were being sent to show proof and then these person's later got credited.
But I ask, is it possible to fake a transaction ID and still be undetected?
Can a fake txn ID be detected in any way effectively?
What do you have to say about this because it's really bothering me I believe not all who made complaints were true and this could be rampant but if a detector is available would be nice we know about it and it will reduce scam payment by detecting real payments through txn ID

Blockchain is a public chain that everyone will be able to see the transaction because all the bitcoin transaction that is been broadcasted is stored there, as such fake transaction ID is not possible because it will not show anything.

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Quote from: Good_Doctor on August 14, 2023, 03:29:19 AM

I was going through some recent history and transactions in a platform and then it crossed my mind that some complaints were being made about unreflected payment and transaction id were being sent to show proof and then these person's later got credited.
But I ask, is it possible to fake a transaction ID and still be undetected?
Can a fake txn ID be detected in any way effectively?
What do you have to say about this because it's really bothering me I believe not all who made complaints were true and this could be rampant but if a detector is available would be nice we know about it and it will reduce scam payment by detecting real payments through txn ID

Considering the fact that transaction identifier (TxID) is nothing else but a mere double SHA256 hash of transaction data and that the process itself is one-way, it is pretty simple to fake and very hard to identify the validity of, especially in cases where the transaction has not been confirmed on the blockchain. Once the transaction is confirmed, however, you can take its data and hash it twice to see if its hash corresponds to a provided one. It is important to bear in mind that any data located outside of the scope of the blockchain cannot be considered valid until it gets recorded and receives at least several confirmations. A malicious actor can provide you with a transaction hash along with transaction data and then change some parts of the transaction, making the previous hash invalid.

AbuBhakar

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Quote from: Good_Doctor on August 14, 2023, 03:29:19 AM

I was going through some recent history and transactions in a platform and then it crossed my mind that some complaints were being made about unreflected payment and transaction id were being sent to show proof and then these person's later got credited.
But I ask, is it possible to fake a transaction ID and still be undetected?
Can a fake txn ID be detected in any way effectively?

It’s possible to fake TXID but there’s no way a fake TXID can go to the blockchain because every transaction that confirmed in the blockchain can’t be cancelled or refunded. There’s a risk of double spend using RBF but you will notice it immediately since everything is recorded on the blockchain.

The only time you can become a victim on this kind of scheme is when you didn’t verify transactions on blockchain because the transaction should be available in the blockchain if there’s already a TXID unless you are using a custodial service.

hosseinimr93

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Quote from: Solosanz on August 14, 2023, 07:36:01 AM

If the transaction is still unconfirmed, the seller can cancel the transaction.

The seller? You probably meant buyer or the sender.

Anyways, note that you can cancel a transaction with replacing that with a new one paying higher fee only if the original transaction has been flagged as RBF.
Since almost all nodes are still using opt-in RBF and they have not enabled full RBF, if your transaction has not flagged as RBF, you can't replace it with a new one even if pay a very much high fee for the replacing transaction.

Of course, I am not saying you should accept an unconfirmed transaction, if it has not been flagged as RBF. There is no guarantee that an unconfirmed transaction will be finally confirmed.

Solosanz

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You need to track the transaction ID in block explorer e.g. blockchair to see whether the transaction has been confirmed or not, it require at least 1 confirmation, you can assume it's already safe as long as you trade small amount e.g. less than 1 Bitcoin.

If the transaction is still unconfirmed, the seller can cancel the transaction.

If they only share a screenshot, don't trust since it's easily to be faked.

Text

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That’s an interesting question. I did some research and found out that it is possible to create a fake transaction ID, but it would be very hard to do so without being detected by the network. A transaction ID is a unique identifier for each transaction that is generated by hashing the transaction data. If someone tries to change the transaction data, the hash would change and the transaction would be invalid. The only way to create a fake transaction ID is to create a fake transaction and include it in a block, but that would require a lot of computing power and luck to fool the network. Most nodes would reject the fake block and the fake transaction ID would not be accepted by anyone.

There are some ways to detect a fake transaction ID, such as checking the validity of the transaction data, verifying the block that contains the transaction, or using a third-party service that tracks transactions on the network. However, these methods are not foolproof and may not work in all cases. The best way to avoid being scammed by a fake transaction ID is to use a trusted platform or service that has a good reputation and security measures.

CryptSafe

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OP if I am not mistaken, from your point of view I believe you are talking about bitcoin transaction and to the best of my knowledge, Bitcoin transaction ID can not faked in any ways. Once a transaction is initiated, it is sent to a pool for confirmation and upon successful confirmation, it reflects i.e been credited to your wallet account. So no one can think of faking a transaction ID.

If you feel someone faked a transaction ID, you have the blockchain explorer to confirm or see for yourself
If the transaction is real or not. What you just have to do is copy the transaction hash and paste on the search bar and search for yourself. Believe me you, if it is a fake it definitely would not show any transaction but if real, would open the ledger for you to see for yourself.

So therefore, it is easy to detect a fake transaction ID by just copying the hash to pasting on the explorer for your on view.

Blitzboy

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Anyone who thinks faking a transaction ID in the blockchain can go undetected has a gross misunderstanding of how decentralized ledgers work! The blockchain is a public, immutable ledger where all transactions are recorded. So, if someone claims they've sent funds and provides a transaction ID, the first thing to do is to verify that transaction on the blockchain itself. If its not there, they're blatantly lying!

Moreover, each transaction ID is unique, representing a specific transaction. To think one can fake this and go unnoticed is laughable. Your concerns about scams are valid; however, the architecture of blockchain makes it incredibly challenging, if not impossible, for someone to fake a transaction ID and not get caught. Always, and I mean ALWAYS, cross-check on the blockchain before crediting anyone.

hosseinimr93

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Take note that all bitcoin transactions are recorded in the blockchain and that's available to the public. Transactions and blocks are validated by the nodes and miners can't include an invalid transaction in the blockchain.
If you have received a bitcoin transaction, it's displayed on bitcoin block explorers and that's confirmed, there's nothing to worry about.

It may worth mentioning that you should never accept an unconfirmed transaction. It's always possible that the same input is spent in another transaction and the unconfirmed transaction is invalidated once the other transaction is confirmed.
If you are receiving a big amount, it's recommended to wait for 2-3 confirmations.

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Quote from: Good_Doctor on August 14, 2023, 03:29:19 AM

But I ask, is it possible to fake a transaction ID and still be undetected?
Can a fake txn ID be detected in any way effectively?

There is nothing like fake txid. If someone come up with his own fake txid, it is not then valid. You can easily know the txids that are valid or not valid on bitcoin blockchain explorers.

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Quote from: Good_Doctor on August 14, 2023, 03:29:19 AM

But I ask, is it possible to fake a transaction ID and still be undetected?
Can a fake txn ID be detected in any way effectively?
What do you have to say about this because it's really bothering me I believe not all who made complaints were true and this could be rampant but if a detector is available would be nice we know about it and it will reduce scam payment by detecting real payments through txn ID

If you’re referring to bitcoin transactions. If you fake a transaction Id if you scan it with a block explorer it won’t show up that’s one way to check it’s really legit or not.

And if you’re a newbie and they want to try the “I used a low transaction fee bullshit” then scan the id on https://mempool.space to see if that transaction exist and it’s just waiting for it to be confirmed, if it doesn’t appear there don’t proceed with your deals and even if it does, wait until you some confirmations on that transaction.

Good_Doctor

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I was going through some recent history and transactions in a platform and then it crossed my mind that some complaints were being made about unreflected payment and transaction id were being sent to show proof and then these person's later got credited.
But I ask, is it possible to fake a transaction ID and still be undetected?
Can a fake txn ID be detected in any way effectively?
What do you have to say about this because it's really bothering me I believe not all who made complaints were true and this could be rampant but if a detector is available would be nice we know about it and it will reduce scam payment by detecting real payments through txn ID

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