# Chain Building and Longest Chain

<figure><img src="/files/fGcCoSVmjetikJ6BnFPT" alt=""><figcaption></figcaption></figure>

*Nodes always consider the longest chain to be the correct one and will keep working on extending it.*

\- Satoshi Nakamoto, Bitcoin Whitepaper

The concept of the **longest chain** is central to the network's operation. Nodes always consider **the longest valid chain of proof-of-work to be the correct one**. This principle ensures that the network remains consistent and that all nodes are working towards a common goal.

#### Chain Building Process

* Nodes continuously work to extend the longest chain by adding new blocks.
* If a node discovers a block that is not on the longest chain, it will not receive any rewards for that block, incentivizing nodes to focus on the most valid chain tip.

#### Importance of the Longest Chain Rule

* **Consensus**: The longest chain represents the collective agreement of the majority of hash power on the network.
* **Resource Efficiency**: Minimizes the risk of wasted resources on blocks that are not built upon.


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