There are still 14 victims of the massive Twitter hack who could still get their Bitcoin back.
These victims sent some Bitcoin to a hacker address, but their transactions are not yet confirmed on the Bitcoin network. They are currently hanging in limbo, or the Bitcoin mempool. These transactions seem not to be confirmed after many hours because the senders designated a very low transaction fee that is not attractive to miners.
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Bitcoin Core developer Wladimir van der Laan confirmed this to Cointelegraph. „Miners choose the higher rate transactions, but they may also have a minimum rate below which they will not mine transactions at all,“ he said.
For example, one transaction proposed a fee of 2 satoshis per byte. The expected delay for a transaction at such a low rate is between 35 and 780 minutes. As van der Laan explained, they may never be processed:
„They may be processed when there’s really nothing more attractive in Mempool (for example, some weekend downtime with small new transactions?), but also, they may never be processed and simply be forgotten.“
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How these victims can get their money back
Victims with their transactions wandering in Mempool can send the same Bitcoin (with the same entries) to another address they control with higher rates. Even if the miners ever get around to processing their original transactions, they won’t be confirmed because the Bitcoin Investor protocol checks the validity of the entries. Because those entries would have been spent, the original transactions would be rejected.
Hopefully, at least some of the victims will learn their lesson without paying the price.