In this proposal, the size of the block is increased but not set to a hard limit.
Instead, miners come to a consensus on the block size cap over a period of time.
A Complete Guide to Understanding This Blockchain Concept
Other concepts such as parallel validation and extreme thin blocks have also been proposed in Bitcoin Unlimited.
Its client is available for download at https://www.bitcoinunlimited.info.
Extreme thin blocks allow for a faster block propagation between Bitcoin nodes.
In this scheme the node requesting blocks sends a getdata request along with a bloom filter to another node.
Purpose of this bloom filter is to filter out the transactions that already exists in the mempool (short for memory pool) of the requesting node.
The node then sends back a thin block only containing the missing transactions.
Why This Matters for Blockchain Technology
This fixes an inefficiency in Bitcoin where by transaction are regularly received twice, once at the time of broadcast by the sender and then again when a mined block is broadcasted with the confirmed transaction.
Parallel validation allows nodes to validate more than one block along with new incoming transactions in parallel.
This mechanism is in contrast to Bitcoin where a node during its validation period after receiving a new block cannot relay new transactions or validate any blocks until it has accepted or rejected the block.
Key Points to Remember
- Bitcoin Unlimited In this proposal, the size of the block is increased but not set to a hard limit.
- Instead, miners come to a consensus on the block size cap over a period of time.
- Other concepts such as parallel validation and extreme thin blocks have also been proposed in Bitcoin Unlimited.
- Its client is available for download at https://www.bitcoinunlimited.info.
Conclusion
Bitcoin Unlimited represents one of the many innovative layers that make blockchain technology so powerful and transformative. As distributed systems continue to evolve, a solid understanding of these core concepts becomes increasingly valuable — not just for developers, but for anyone building, investing in, or working alongside blockchain-powered systems.
Whether you are just starting your blockchain journey or deepening existing expertise, mastering these fundamentals gives you the tools to think clearly about decentralized systems and make smarter decisions in this rapidly evolving space.