Topic: BCH sent from ElectrumSV wallet to Poloniex (Read 165 times)

it happens with fork coins. to know how it happens you first need some background.
in blockchain technology based on bitcoin (both of these altcoins are copies of bitcoin) your balance (or the coins you own) are in form of transaction outputs on the blockchain. so for example  when you receive BCH you receive a transaction with a value attached which is recorded on the blockchain when it is mined (or confirmed). then when you want to spend your coins you sign a transaction that includes a reference to this transaction ID.

when a fork coin is created, they copy the entire blockchain so with that they are copying the whole history including your transaction which is in one of the blocks. so now your transaction exists on two different blockchains since it was duplicated. and since it is a copy, it copies everything including how transactions work,...

so now when you create a new transaction spending that tx that was copied the resulting transaction is valid on both chains if the cahins haven't  put any kind of protection when they make their copy (which is the case here). any malicious person who runs both nodes can take transactions from one chain's memory pool and if they were valid it broadcasts them on the other network. this action is called replaying the transaction. and the protection against it is called replay protection.

it is hard to say why your other transactions didn't have the same issue. maybe no attacked picked them up to replay them on the other chain, or maybe you had included transaction outputs from blocks that were mined after the fork so the tx was invalid on the other chain.

Thanks Herbert, yes I did own both on the same address with the same outputs.  How does a replay attack happen and why wouldn't it have happened on the first two test transactions?  Thank you for your help. 

did you own both BCH and BSV in the same address with the same transaction outputs? if that is the case then your issue sounds a lot like replay attack which is when you send a transaction that is valid on two different chains only on one chain and it is "replayed" on another chain too.
considering both shitcoins BCH and BSV don't have replay protection against each other, i think this is exactly your problem too.

your only option is to contact Poloniex and ask them to manually import the key from one wallet to another and credit your account.

I have a feeling you sent the BCH to Poloniex probably without knowing or by mistake thinking it was BSV. I don't think a transaction can happen by itself without you initiating and authorizing it.

Your only luck now lies in the hands of the support of poloniex thou like some members have talked about above, it sucks big times. Just brace yourself for any disappointments that may come your way.

I would assume that no single mistake happened in all transactions so there must be something on the receiving end which is on the Poloniex side. The only way this problem can resolved and have your 4 BCH appear in your Polo account is to, of course, contact the support of the site and be always ready with your proofs of the transactions because I am they are going to ask for it. Now, I heard many bad things on this exchange, a friend of mine who has a polo account for the past many years told me last week that he is not recommending Poloniex to me as he can sense that the platform has deteriorated a lot in many facets of its operation. Well, I am hoping that all is well with Poloniex. I hope that a new and empowered team can be taking over the exchange and make it a great again.

Contact their support. I think they can recover it, but that's only if they want. And IIRC, their support was always bad.

There is a chance they help you (even if for a fee), but if they don't want to do that, then your coins are gone.

No one here can help you.

I did two test transactions of .1 Bitcoin SV to my Poloniex wallet that worked fine.  Then when I went to transfer 4 Bitcoin SV it sent, but a second transaction of BCH was sent 20 minutes later to the Bitcoin SV wallet on Poloniex.  I don't understand how this could have happened and now I appear to have lost the 4 BCH.  Can anyone help me understand how this could have happened and if there is a way to recover the coins.  This is a lot of money for me.  Thanks in advance for your help.