> For the complete documentation index, see [llms.txt](https://docs.bool.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bool.network/develop-guide/testnet/bool-chain.md).

# Bool Chain

Bool Chain is developed based on Polkdot Substrate framwork and implements **Nominated Proof-of-Stake (NPoS)** consensus algorithm to improve the overall security of the network. 

Nominators and Validators are two vital roles in a NPoS network. Nominators are responsible to nominate the most reliable nodes to validate new blocks within the network. Validators refer to nodes that have been nominated by nominators and are allowed to verify new transactions and earn rewards for their contributions to the network security.

Developers can follow guides provided in [Node operators](/develop-guide/testnet/bool-chain/node-operators.md) to run their individual nodes within the Bool Chain, and further become [Validators ](/develop-guide/testnet/bool-chain/validators.md)to maintain the network consensus.