Block decompression refers to the process of expanding data that has been compressed within a block in a blockchain. Blocks in a blockchain contain various types of information, including transaction data, timestamps, and other relevant details. To save space and enhance efficiency, this data is often compressed before being stored.

When a block needs to be accessed or validated, the compressed data must be decompressed to retrieve the original information. This involves reversing the compression algorithm that was used during the initial storage. The goal is to ensure data integrity while minimizing storage requirements.

Decompression is crucial for maintaining the functionality of nodes within the network. These nodes need to quickly access and verify the data in blocks to maintain consensus and validate transactions. Efficient decompression techniques contribute to faster processing times, ensuring that the network runs smoothly and can handle a high volume of transactions without delays.