> For the complete documentation index, see [llms.txt](https://docs.bahamut.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bahamut.io/overview/consensus-posa.md).
# Consensus PoSa
**PoSA** is a novel consensus algorithm that blends the strengths of PoS with an additional activity factor. The **activity** factor is calculated based on the usage of the smart contracts deployed on the network. In simple terms, the more a smart contract is used, the more impact it will have in the consensus process. This creates an incentive for contract developers to create high-quality, highly-used contracts, as they will have more impact in the network.
**How Does PoSa Work?**
In **PoSa**, validators (i.e., nodes that validate transactions and blocks) must first stake a fixed amount of tokens, which is **8192** for all validators, to participate in the **consensus** process. This stake serves as collateral, ensuring that validators act in an honest manner. However, in **PoSa**, the ranking of a validator is determined not only by the size of their stake but also by the activity of their smart contracts.
The **activity** of a smart contract is the sum of all gas used by users when interacting with the contract. The more gas a contract uses, the more active it is considered to be. This activity is then combined with the validator's stake to determine their rank.
The advantage of this approach is two-fold. Firstly, it provides an **incentive** for developers to create high quality, highly used contracts, which helps to maintain the overall health and security of the network. Secondly, it helps to **decentralize** the network, as validators with high quality, high usability contracts will have a greater influence in the consensus process.
It's important to note that even validators without activity are still important to the network, as they play a role in maintaining its **security and stability**.