> For the complete documentation index, see [llms.txt](https://panda-of-borderlands.gitbook.io/pandaofborderlands-litepaper-v-1.0/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://panda-of-borderlands.gitbook.io/pandaofborderlands-litepaper-v-1.0/info/blockchain.md).

# Blockchain

## Matic Polygon

Polygon is a side chain or Layer 2 solution to ETH , which allows you to deploy Ethereum Smart Contracts, although instead of deploying to ETH, you deploy to a polygon network. We can easily conclude that **ethereum is the main chain and Polygon is the side chain**.

Which is better Polygon or Ethereum?

What is this? In summary, **Ethereum has a high gas fee, is more secure, has auctions, and is more popular**. On the other hand, Polygon has no gas fees, is less secure, has no auctions, and is less popular. If you're selling NFTs on Ethereum, you need to pay one-time fees and recurring fees.

**Why does Pandaofborderlands use Polygon Networks?** 

Because the polygon layer 2 Etherium network in **the Polygon network the gas cost is very cheap**, but with the **very cheap gas costs** it does not harm panda holders because of the polygons themselves if panda holders sell their NFT on Opensea market or outside market they can sell for the same price as real Etherium.