According to BlockBeats news, on September 27, Fractal Bitcoin stated on social platforms, “We received feedback from some users that the block filling of the Fractal mainnet was incomplete. We immediately launched an investigation.

Here are more details of what happened: Miners typically prioritize high-fee transactions and are subject to two block size limits: 1) the maximum block size in bytes; 2) the maximum number of SIG operations. When faced with a large number of high-fee MULTISIG transactions, a block can reach the 80,000 SIG limit and be unable to contain any more transactions.

Usually, Segregated Witness (SegWit) transactions consume 1 SIG, and theoretically a block can accommodate up to 80,000 transactions (80,000/1=80,000). This is well outside the standard, so SIG limits are rarely observed in practice. Transactions containing MULTISIG consume 84 SIG, which means that if a block is completely filled with such transactions, the maximum number of transactions in a block will be reduced to 80,000/84 = 952. This results in the block bytes not being completely filled.

We observed that some random blocks were completely filled because they contained non-MULTISIG low-fee transactions. These transactions fill the remaining 75% of the block space, causing the total block fee to increase by approximately 20%.

This situation is caused by the existing mechanism of the BTC main network and is not a defect of the Fractal browser. We will continue to monitor the situation closely and work to improve network connectivity and performance. “

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