> For the complete documentation index, see [llms.txt](https://x1ecochain.gitbook.io/x1-ecochain-tech-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://x1ecochain.gitbook.io/x1-ecochain-tech-whitepaper/technical-architecture/pon-consensus-mechanism.md).

# PoN Consensus Mechanism

Proof of Nodes (PoN) is the foundation of X1 EcoChain's always-on infrastructure. A global network of X1Nodes strengthens block integrity, supports validator activity, actively participates in the signing process, and ensures continuous network availability — eliminating the computational overhead associated with Proof of Work while preserving robust resistance to 51% and Sybil attacks.

Validation is performed exclusively by credentialed participants who have met the conditions required to achieve Node status. This permissioned architecture delivers instant finality and high throughput: blocks confirm in approximately 7.5 seconds, and the network sustains up to \~2,000 TPS. Because nodes are inexpensive to operate, gas can be priced near marginal cost — approximately $0.01 per transaction.

The result is a secure, scalable consensus stack that eliminates CPU/GPU waste without compromising performance or decentralization of participation.