# Chainlink VRF v2

<div align="left"><figure><img src="/files/O3VPR9brEB99XXir9Ubt" alt="" width="332"><figcaption></figcaption></figure></div>

## Verifiable source of randomness

Chainlink VRF provides cryptographically secure randomness for your blockchain-based applications.

{% embed url="<https://www.youtube.com/watch?v=eRzLNfn4LGc>" %}

## Provably random

Provably random, tamper-proof, and low cost randomness for smart contracts

<figure><img src="/files/oLeO1EZPQy7FFJnldqRX" alt=""><figcaption></figcaption></figure>

## Easily integration

Easily integrate verifiable randomness in your smart contract:

```
unit256 public randomResult;
function fulfillRandomness(uint256 requestId, unit256[] randomness) internal override {
      randomResult = (randomness[0] % 50) + 1;
}

```

## Provably secure applications

Build provably secure blockchain-based applications with Chainlink VRF across multiple use cases:

<figure><img src="/files/tPr0VW9hHmyZrKpqVnuQ" alt=""><figcaption></figcaption></figure>

## Grow your reach

Grow your application’s reach with Chainlink VRF, a purpose-built RNG for smart contracts

#### Random number generation (RNG) for smart contracts

* Produce fair and unbiasable randomness for your blockchain-based application’s outcome
* All random number results are verifiable before becoming available to consuming smart contracts
* Oracles are unable to manipulate the generated result, the only thing they can do is not respond

#### Provide your users with a more trustworthy experience

* Build better experiences by leveraging random outcomes in your blockchain-based application
* Provide users with cryptographic proof of your application’s integrity to facilitate a high level of trust
* Broaden your user base by leveraging fair and unbiasable randomness for your application’s outcomes

#### Provably-fair and verifiable randomness

* On-chain block data is used as inputs to the RNG, which is combined with the oracle’s private key to generate a random value and proof
* Each random result is verified on-chain with cryptographic proofs
* Malicious users, node operators, and smart contract admins cannot tamper with the resulting randomness

#### Randomness on a massive scale

* Lower gas fees with Subscription Management App while delegating access to the Subscription’s balance to multiple consumer addresses
* Take advantage of the most configurable VRF experience by setting custom callback gas limits, block confirmation time
* Get even more randomness per request in an intuitive way

## Official resources

Website: <https://chain.link/vrf>

Docs: <https://docs.chain.link/vrf/v2/introduction>

Direct Funding Method: <https://docs.chain.link/vrf/v2/direct-funding>

## Supported Networks

Relink makes this demanded service available on these networks:

#### Horizen EON

{% content-ref url="/pages/EgxLczwqAm8neC2zsRXb" %}
[Horizen EON](/supported-networks/horizen-eon.md)
{% endcontent-ref %}

* Proxy Contract: <https://eon-explorer.horizenlabs.io/address/0xC8e11C15cf94a456209B7AbF110481Eb86B50C0c>
* Fee: 0.015 ZEN
* Default Forward Gas: 120,000
* Maximum Random Values: 10
* Minimum confirmations: 3

#### Stellar Soroban&#x20;

{% content-ref url="/pages/HLgy02XerJQ82ax3h8mn" %}
[Stellar Soroban](/supported-networks/stellar-soroban.md)
{% endcontent-ref %}

*<mark style="background-color:yellow;">(coming soon)</mark>*


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