pyth-network_pyth-crosschain/apps/developer-hub/content/docs/entropy/index.mdx

---
title: Entropy
description: Secure, Verifiable Random Number Generator for EVM-based smart contracts
icon: DiceSix
full: true
---

import {
  RocketLaunch,
  FileText,
  DiceSix,
} from "@phosphor-icons/react/dist/ssr";

**Pyth Entropy** is an on-chain random number generator (RNG) designed for developers who need fair, unbiased, and cryptographically secure randomness.
Whether you're building a blockchain game, NFT mint, lottery, or simulation, Entropy delivers randomness that is:

- **Trustless & verifiable** - built on [commit-reveal protocol](./entropy/protocol-design).
- **Low-latency** - randomness available within a [few blocks](./entropy/contract-addresses).
- **Easy to integrate** - Permissionless Integration, including [Visual Tx Explorer](https://entropy-explorer.pyth.network/).
- **Cost-efficient** - designed for scalable production use [fees](./entropy/contract-addresses).
- **Native gas fees** - pay with chain native token.

## What's New in Entropy v2

Entropy v2 introduces several improvements and new features to make random number generation more flexible and efficient.
See [What's New in Entropy v2](whats-new-entropyv2) for more details.
(TODO: Add an infographic here)

## Getting Started

Using Pyth Entropy is permissionless and developers can integrate in a few minutes.
Please see [How to Generate Random Numbers Using Pyth Entropy](generate-random-numbers) to start integrating Pyth Entropy into your application.

## Reference Material

- [Protocol design](protocol-design)
- [Contract Addresses/Supported Networks](contract-addresses)
- [Error Codes](error-codes)
- [Entropy Debugger](https://entropy-debugger.pyth.network/) - Interactive tool for diagnosing callback issues

## Start Building

<Cards className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-3">
  <Card
    href="/entropy/create-your-first-entropy-app"
    title="Build Your First App"
    icon={<RocketLaunch size={16} fill="unset" weight="duotone" />}
  >
    Step-by-step tutorial to deploy a coin flip using Entropy v2.
  </Card>
  <Card
    href="/entropy/generate-random-numbers-evm"
    title="Generate Random Numbers"
    icon={<DiceSix size={16} fill="unset" />}
  >
    How-to guide for reading fees and requesting randomness on EVM.
  </Card>
  <Card
    href="/entropy/contract-addresses"
    title="Contracts & Providers"
    icon={<FileText size={16} fill="unset" />}
  >
    Find Entropy addresses, reveal delays, gas limits, and fees.
  </Card>
</Cards>