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1  Bitcoin / Bitcoin Discussion / Re: Lost 900$. Block chain compromised or scamming us on: July 23, 2020, 01:27:24 PM
thing i find strange is how the sender didnt want to pay $900 using your original plan of wait 1 confirm
but he talked you into a lengthy thing of setting up new accounts and sending you a test amount for 1 confirm. and then later lots of different amounts on his non confirmed method he prefers.

seems like he talked you into a lengthy ploy where he could double spend you
knowing it would take a long while to get you to set up another account and do the test.
if it was a time issue. he coulda just paid you $900 in 10 minutes and been done with it. it just seems fishy he talked you into a process/workaround that took longer than 10 minutes just to avoid a confirm.

i think the sender sent you funds with no fee so that he knew it would get held up as pending for hours

while separetly he sent the funds to himself with a fee. thus making your pending/unconfirmed transaction just drop out of mempool because it wasnt the preferred payment worthy of being confirmed

i dont think it was blockchain.com fault. but more of the guy you talked to in discord that coerced you into such a weird process to avoid paying you $900 confirmed

i think the guy you spoke to in discord embellished the "instant" into sounding like he was saying its "guaranteed"

transfers are not guaranteed instantly.
seeing the payment is pending is instant because a blockchain userA pushes their payment into blockchain.coms mempools so blockchain.com mempool sees it instantly AS PENDING
this means instead of an separete service that might only broadcast to the network every 20 seconds and it taking another 10 seconds for full network viewing. ths 300 second delay just to see it as pending
by both you and the sender getting pending data from the same source it saves 30 seconds of waiting before even knowing its pending.
it has nothing to do with having it confirmed instantly

then all the guy had to do was push his pay-to self transaction directly to a mining pools node so that miners see his tx first and that gets allocated to a block. and the pending payment to you gets ignored by the miners 30 seconds later because it already recieved a payment with a higher fee it prefered.

so while your stuck just looking at a mempool thats just showing your payment is pending.
the pay-to-self gets confirmed. and eventually the blockchain.com mempool scrubs your pending payment


This will all be prevented if blockchain did not add the unconfirmed amount in my total wallet balance. also the 1st 50$ transaction is not confirmed either, but somehow blockchain allowed me to send that unconfirmed amount to my another wallet after reducing a fee, but at end that 50$ i tried to move also never got confirmed it stayed as 0/3 confirmation till all the transaction history got wiped at the end. when i had the option to send the 1st 50$ i tought hey its working if its not in my wallet how can they allow me to move to other wallet so i asked him to send further amounts. this whose crypto system is not user friendly, its scammer friendly.
2  Bitcoin / Bitcoin Discussion / Re: Lost 900$. Block chain compromised or scamming us on: July 23, 2020, 01:19:18 PM
so from this what is see is crypto is not really "secure" coin. someone new always going to fall for such scam. Its really not for normal people and business, its the currency for scammers and businesses who do illegal trades and wants to hide transactions from authorities.
Are you trying to say scammers were not there before the birth of cryptocurrencies?
Can you even be able to count how many times have terrorists, drug dealers, warlords and corrupt Government officials have used the US Dollar and other fiat currencies to commit crimes?
Your perception of cryptocurrencies is totally wrong. Even the same PayPal you keep praising has been used by scammers countless times to scam people

We are talking about personal money not the tax money here. how much money from your pocket did u loose to those crimes? its either tax or money these illegal parties make themself illegally. are u saying crypto is not used for such crimes u listed? from my view apart from some individul investor, it is mainly used for illegal transactions to hide from laws.
im not praising paypal, im saying chargebacks can be reverted by filing a complaint.
i looked around and read some blogs about crypto, the 1st point everyone says is they dont trust their central bank.
where can central bank run with whole countries wealth?, out of this planet? is there a real reasons to not trust central bank or they dont trust because everyone says they dont trust? just like news channels play mindgames on election time. again im not supporting anyone, its a genuine question i want to know why everyone dont trust their central bank.
3  Bitcoin / Bitcoin Discussion / Re: Lost 900$. Block chain compromised or scamming us on: July 23, 2020, 11:58:42 AM
--snip-- One of blockchain wallet's stupid features is that the balance comes up in the wallet even before the bitcoin transaction is confirmed. This will make you think that you have received the bitcoins but once the sender performs a double spend attack, the transactions ceases to exist and the blockchain.com will reset the bitcoin balance and transaction history back to zero.

Avoid using such stupid wallets.
The link on blockchain.com shows an Android wallet. If an address was generated on this wallet, how can that address say "This BTC address is unused". If the balance shows up on the "blockchain" wallet for an unconfirmed transaction, that means they should be acting as the escrow or arbitrator for such a transaction. Judging from the fact that the OPs incoming transactions never got confirmed, Blockchain.com effectively "ALLOWS" such a double-spend attack.

If the confirmation count is still zero, hopefully, OP wouldn't have parted with whatever digital good he was giving the other person. He never intended to send the money and expected that a ticket will be raised. Then sent a email to fool you into sharing your wallet mnemonic. Social engineering hack at the most.

Also, can anyone explain how does a transaction that shows up in the blockchain.com wallet (or explorer) can end up being "wiped" clean?? Is this about non-confirmed transaction being reversed if the attacker used a RBF option at the time of creating the transaction??

You used Unocoin, Is this India? Relying on instant settlements in bitcoin or any other PoW cryptocurrency is fraught with risk. So always wait for that 1 confirmation. Blockchain.com doesn't claim to provide instant settlement so accepting an incoming wallet balance with zero confirmation is a decision that the user has to make. They probably just give you the option to "see" an incoming transaction in the mempool without going to the block explorer.

 

yes unocoin is from india. in that wallet amount will not show up in btc balance until it confirmed. i can see it in transaction as waiting for confirmation. but in this blockchain wallet it was showing in wallet balance. so i thought i actually received the money. it looks like its been around for a while and they did not fix this, so they are allowed such attacks. from what i see from this, they are not into creating healthy business, they will run with people's coin anytime once someone decided to move large amount of coin to their exchange.
4  Bitcoin / Bitcoin Discussion / Re: Lost 900$. Block chain compromised or scamming us on: July 23, 2020, 11:47:05 AM
for this attack, the btc is being sent internally from another blockchain wallet right? so whoever doing this attack has the coin in his blockchain wallet. their system must registered how many times he did speed spend attack and blockchain can move the available btc(if not fully) to the person who lost in this, after all its their official wallet not other party wallet.
1. Whether BTC is sent from Blockchain wallet to Blockchain wallet or from a different wallet to blockchain wallet. The balance and the transaction details appear almost instantly as soon as the blockchain.com wallet detects an incoming transaction... This does not necessarily mean you have received the bitcoins yet. You have to check if the transaction has been confirmed. It's a common feature with other exchanges and casinos though I don't like it.

2. They make is so clear that they can not assist as an intermediary in payment disputes. Your wallet, Your transactions, Your funds, Your responsibility.
Quote
Contact the platform, exchange, or party from which you expected to receive funds. Please note that the Blockchain.com support team cannot assist as an intermediary in payment disputes.
https://support.blockchain.com/hc/en-us/articles/360000575926-I-was-expecting-to-receive-funds-but-have-not-received-them-yet



The link on blockchain.com shows an Android wallet. If an address was generated on this wallet, how can that address say "This BTC address is unused". If the balance shows up on the "blockchain" wallet for an unconfirmed transaction, that means they should be acting as the escrow or arbitrator for such a transaction. Judging from the fact that the OPs incoming transactions never got confirmed, Blockchain.com effectively "ALLOWS" such a double-spend attack.
Even if the address is generated, if it doesn't receive any confirmed transaction, it still remains unused.
I also don't like how they show the balance even before the transactions gets a single confirmation.
Here is an example of how another Blockchain wallet user got confused because of the same thing and got scammed off BTC worth $2000 - Help with a missing Bitcoin transaction


so from this what is see is crypto is not really "secure" coin. someone new always going to fall for such scam. Its really not for normal people and business, its the currency for scammers and businesses who do illegal trades and wants to hide transactions from authorities. only reason i wanted to try this because it dont have big transaction fee, currency conversion fee like paypal. atleast in paypal we can win charge backs. im just going to sweep this under rug as unexpected monthly loss and going back to traditional secure currency. im actually glad it learned this early at 900$ not at 900k$.  Thank you to everyone who took time to explain things.
5  Bitcoin / Bitcoin Discussion / My Question to Crypto users about its security on: July 23, 2020, 11:14:56 AM
Crypto is praised as currency of future, 100% secured way of transaction. my question is how?

-If you have money in bank or invested in stock or somewhere else regulated by government and you dies, bank/stock exchange will contact the nominee when the account goes inactive. but if a person who hold crypto dies, nobody will know about this so the money is lost forever. if the person decides to share the crypto details with someone then its not really a "secured" currency.

-If someone stole money from your bank/stock/credit card account, it can be tracked where the money went and can be recovered by filing complaint with your bank or authorities. but if somone steal your crypto there is no way to get the crypto back.

So how is this a currency of future, did anyone asked these question before?
6  Bitcoin / Bitcoin Discussion / Re: Lost 900$. Block chain compromised or scamming us on: July 23, 2020, 10:56:00 AM
If blockchain suspected this double spend attack they should atleast give the btc to person who lost in this scam. but they still have this feature after knowing its vulnerability and doing nothing to person who lost means they should be leagally taken down from which ever country they originated from.
How will they give BTC to someone who never received it in the first place according to blockchain explorer?

It's always important to wait at least for 1 confirmation before proceeding with business. Use bitcoin explorers like Blockchair.com confirm that the transaction sent to your address has been confirmed.
for this attack, the btc is being sent internally from another blockchain wallet right? so whoever doing this attack has the coin in his blockchain wallet. their system must registered how many times he did speed spend attack and blockchain can move the available btc(if not fully) to the person who lost in this, after all its their official wallet not other party wallet.


If blockchain suspected this double spend attack they should atleast give the btc to person who lost in this scam. but they still have this feature after knowing its vulnerability and doing nothing to person who lost means they should be leagally taken down from which ever country they originated from.
They won't give you that amount.

Wallet providers aren't responsible for any amount that was scammed to their users. If the negligence is on their part, they might give a refund but in your case, you were tricked. Sorry with that.
isnt that a security hole other than being called "tricked". money appears in my wallet balance, its a security hole in their system.
7  Bitcoin / Bitcoin Discussion / Re: Lost 900$. Block chain compromised or scamming us on: July 23, 2020, 10:40:16 AM
If blockchain suspected this double spend attack they should atleast give the btc to person who lost in this scam. but they still have this feature after knowing its vulnerability and doing nothing to person who lost means they should be leagally taken down from which ever country they originated from.
8  Bitcoin / Bitcoin Discussion / Re: Lost 900$. Block chain compromised or scamming us on: July 23, 2020, 10:17:25 AM
no i googled blockchain and clicked top result(not ads). the address is https://blockchain.com for wallet, https://exchange.blockchain.com for exchange.

If its full of bugs, did they ever refunded btc before?
9  Bitcoin / Bitcoin Discussion / Lost 900$. Block chain compromised or scamming us on: July 23, 2020, 09:41:31 AM
Hello i was looking for a btc forum to post this and get help if possible. i normally use paypal for online payments, i dont deal in crypto, just started accepting crypto recently. i used my local country wallet called unocoin also exodus before, both i had no problem. today i created blockchain wallet because i heard blockchain to blockchain transaction is instant, like i heard i got the btc instant. i will explain everything in steps below.

i advertised selling something(digital good) in a market forum. to contact i posted my discord id. few hrs after a person contacted me, we negotiated price and i said i will have to wait for atleast 1 conformation before giving the goods. he suggested to use blockchain wallet which is instant transfer to wallet within block chain network. so i created wallet on blockchain.com. to test the wallet i asked him to send only little,

-he sent 50$ btc, i received the 50$ worth btc almost instant. the transaction was successful and registered in transaction history
- i decided to test if i can send this btc to my local wallet unocoin. i sent the 50$ worth btc which they took some fee. i checked transaction history, it said 0/3 confirmation, it was pending(which i never received yet to my unocoin after 12hr)
-after the 50$ btc , my buyer sent few 100$ and some 200$ worth total around 900$ worth btc. all this was registered in transaction list.
-after this i created their exchange account on exchange.blockchain.com and i had to link my wallet with exchange acc.
-after linking i came back to wallet and refreshed the page, the balance went to 0. i looked transaction history, history is wiped, and says this btc address is unused.
-i thought maybe its a bug, i refreshed the page, relogged, but no nothing is in account. even checked exchange account, its not there too.
-so i opened 2 support ticket on their site, for both i received confirmation with ticket number to my mail. i did not give this mail id to anyone else.
- 10min after i sent 1st support ticket i received response to junk folder in my mail from totally different domain. i was thinking how did someone got my email id, i only gave it to blockchain while creating account.

This is the email i got from support@blockchainexchange.vip (i knew its scam, so i did not respond this this mail)
Quote
Hello.

It looks like your Blockchain wallet is out of sync with our database. This may cause issues such as balances not showing correct. Or problems sending and receiving cryptos as well as buying cryptos and trading platform services may be restricted.
The good news is this is easy to fix. Please follow the below steps and we will synchronize your wallet with our database resolve this issue.

Step 1; Locate your backup words in our security menu.If you are logging into your wallet from our web platform   https://login.blockchain.com/#/login   You can find this in the top right corner. Simply click on Security and then on Backup Phrase. You will see our warning message and you click on Back Up Now.If you are using a mobile device you will see a section on the menu bar that says Backup Funds you simply click on that and it will start the process.

Step 2; Backup your funds Once you have the 12 words located, please send them in a reply to this email and I will match the words on our system. Once this is done your wallet will be synchronised again.
*IMPORTANT* Please do not share these words with anyone outside of Blockchain. These should be kept private when possible. Blockchain employees will NEVER ask for your wallet ID and Password, and we advise that you keep 2FA enabled at ALL times.


David | Blockchain.com Support
Facebook:  https://www.facebook.com/blockchain
Twitter:  https://twitter.com/AskBlockchain
Blog:  https://blog.blockchain.com/

Disclaimer: Please note Blockchain.com does not provide investment advice or recommendations. The information made available to you is for your general use and is not based on any evaluation of your personal circumstances. If you are unsure of any investment decision, you should seek independent financial advice.


-so my instant question was how did they get my support ticket which i sent on blockchain.com.
- so blockchain is compromised or officially scamming, they took the btc back, for what i know it is not possible to charge back btc by sender. my transaction history is wiped, so this is inside scam on blockchain. i did not even receive the 1st 50$ btc i transfered to test from blockchain to other wallet for 12hr, that transaction history also wiped. i can make that 900$ in few days but i want others to know this aswell.
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