Duplicate Coinbase Transactions Are Allowed

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If a miner includes transactions in a block he receieves a fee for that, these fees are transfered to an address of his own in the coinbase transaction with the mining reward.

– Reject duplicate blocks – Perform a series of sanity checks on the block and its transactions such as verifying proof of work, timestamps, number and character of transactions, transaction amounts, script complexity, and merkle root calculations – Compare the block against predetermined checkpoints for expected timestamps and difficulty based on elapsed time since the checkpoint – Save the.

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The coinbase transaction can assign the entire reward to a single Bitcoin address, or split it in portions among multiple addresses, just like any other transaction. Coinbase transactions always contain outputs totalling the sum of the block reward plus all transaction fees collected from the other transactions in the same block.

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19/09/2018 · CVE-2018-17144 could technically have allowed a malicious miner or group of miners to perform duplicate transactions and burn block rewards, forcing nodes off the network in the process. Cobra, the creator of information resource Bitcoin.org, said the bug even had the potential to create chaos in a “huge chunk” of the ecosystem.

There are a few ways of looking at bitcoin mining. As an ostensibly selfish enterprise, wherein miners are seeking to extract precious coins for profit. And as a community of individuals who envisage a better way of generating, handling and using money, and are motivated to secure the Bitcoin network.

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