Duplicated orphan blocks in sequence are rare in the Bitcoin blockchain.
Rare event creates two ‚orphan‘ blocks in the BitcoinNOTÍCIAS blockchain
A rare event caught the attention of the Bitcoin community on Wednesday when two „orphan“ blocks were created and discarded in the blockchain of the world’s largest cryptomeda.
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Both blocks were mined by F2Pool and Slush at the height of blocks 656,477 and 656,478. At the same time, the same blocks were opened by two other mining companies, BTC.com and Binance, which generated a split in the chain and the duplicate blocks were discarded without prejudice to the transactions, according to BitMEX Research published on Twitter:
Still according to BitMEX, there was no damage to Bitcoin Champion the transactions. But how can Bitcoin mining generate an „orphan“ block and discard it?
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How does an „orphan“ block happen?
In Bitcoin’s blockchain, each block of a blockchain is made up of several transactions collected by the miners in line. Orphan blocks are most common in the Bitcoin network and are usually rejected when two miners produce a block very close together. As only one block can exist at the end, the winner is decided based on which block has the most proof of work.
There are also cases where hackers try to create orphan blocks in an attempt to reverse transactions and steal funds, as explained by Cointelegraph Brasil in this article.
However, when an orphan block happens in the blockchain, as the transactions go to the end of the queue, it is best to wait for the transfer to be completed or the cryptomorphs to be recovered. When such a block is identified, the transactions return to the queue and are included in a subsequent block.
The creation of orphan blocks is common in blockchains, but the creation of two orphan blocks in a row, as happened this Wednesday, is much rarer. At the end of September, BitMEX Research also found two obsolete blocks, with the event also taking place in July and August.
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According to experts, although not rare, they can impact on mining. According to a BitMEX Research spokesman, orphan blocks result in „wasted work, less proof-of-work, which can make the network cheaper to attack.
In addition, he says the orphan blocks „can benefit larger mining companies by increasing the pressure of centralisation.