How many sigops are in the invalid block 783426?


The invalid block 783426 has been a topic of discussion and analysis in the bitcoin and blockchain community. One of the questions raised about this block is the number of signature operations (sigops) it contains. In this article, we will explore what sigops are, how they affect bitcoin transactions and block validation, and the issue of invalid block 783426.

What are Signature Operations (SigOps)?

In the Bitcoin blockchain, each transaction has one or more inputs and one or more outputs. Each input must be unlocked using a digital signature, which is essentially a mathematical proof that the owner of the input has authorised the transaction. A signature operation (sigop) is a calculation performed by the Bitcoin network to verify that the signatures in a transaction are valid.

When a block is added to the blockchain, the network must validate all transactions in the block, including the sigops. Each block has a limit on the number of sigops it can contain, which helps prevent denial of service attacks by limiting the amount of computation required to validate a block. This limit is currently set at 80000 sigops per block.

The impact of sigops on the bitcoin blockchain

SigOps affect the scalability and transaction processing speed of the Bitcoin network. Transactions with a high number of sigops are more computationally expensive and take longer to process, which can cause delays and make it difficult for lower fee transactions to be confirmed quickly.

To address this issue, Bitcoin developers implemented a solution called Segregated Witness (SegWit). This protocol separates the signature data from the transaction data, reducing the total number of signatures required to process a bitcoin transaction. This makes the whole process more efficient and allows more transactions to be processed in each block.

The invalid block 783426

In May 2021, an invalid block (block 783426) was mined on the Bitcoin blockchain. This block contained approximately 1.2 million sigops, which is well over the block limit of 80000 sigops. This caused the remaining Bitcoin nodes to reject the block and not add it to the blockchain.

The invalid block 783426 is a serious issue for the Bitcoin network, as it highlights a problem with sigop counting that could potentially be exploited by malicious actors to create invalid blocks. In order to prevent such malicious activity, the Bitcoin community has been working on various solutions, including the adoption of the updated version of the Bitcoin Core client, which performs better sigop counting.


What are signature operations in the context of bitcoin and blockchain?

In bitcoin and other blockchain technologies, signature operations (sigops) refer to the number of computational operations required to validate the digital signature of a transaction. These operations are counted as a way to prevent spam attacks on the network, as they require computational resources to process.

What does invalid block 783426 mean?

Block 783426, also known as the “Baker’s Delight” block, is a notorious invalid block on the Bitcoin blockchain that was created in 2013. This block contained an unusually large number of signature operations, causing it to exceed the maximum block size allowed on the network. As a result, the block was not accepted by the network and did not become part of the blockchain.

How many signature operations were in invalid block 783426?

According to various sources, including Bitcoin Core developer Greg Maxwell, the invalid block 783426 contained approximately 922,104 signature operations. This exceeded the maximum allowed at the time, which was 20,000 signature operations per block.

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