# Band Protocol (Oracle)

Band Protocol offers oracles to dapp developers, including VRF functionality (verifiable random function).

Band Protocol feeds are primarily available via a "push" model.

Website: <https://www.bandprotocol.com/>

### Deployment status

### :white\_check\_mark: **Cronos zkEVM Mainnet (Chain-id : `388` )**

#### **Price oracle, supported symbols: $CRO, $ETH and $BTC:**

<table><thead><tr><th width="247">Contract name</th><th>Contract address</th></tr></thead><tbody><tr><td>StdReferenceProxy</td><td><a href="https://explorer.zkevm.cronos.org/address/0x4ef80a75ac964d9eb366263a065ed35c842efe40#code">0x4EF80A75AC964D9Eb366263A065ED35c842efE40</a></td></tr></tbody></table>

* Github reference: <https://github.com/bandprotocol/band-std-reference-contracts-solidity>

#### **VRF**:

<table><thead><tr><th width="244">Contract name</th><th>Contract address</th></tr></thead><tbody><tr><td>BridgeImplementation</td><td><a href="https://explorer.zkevm.cronos.org/address/0xe34164dc6c21dcd3281d74640003c2b5abfc132e#code">0xe34164dc6c21dcd3281d74640003c2b5abfc132e</a></td></tr><tr><td>Bridge</td><td><a href="https://explorer.zkevm.cronos.org/address/0x8d6a0d333236375fc3055cf40b5d1ed2dae8ca72#code">0x8d6a0d333236375fc3055cf40b5d1ed2dae8ca72</a></td></tr><tr><td>ProxyAdmin</td><td><a href="https://explorer.zkevm.cronos.org/address/0x2b04B94C6fbaC2a4a70fFEC6EFb5bd3521e7D11a#code">0x2b04B94C6fbaC2a4a70fFEC6EFb5bd3521e7D11a</a></td></tr><tr><td>VRFProviderV2</td><td><a href="https://explorer.zkevm.cronos.org/address/0x5EB8A226A06Ee633fEf49804362F2702cEbceA31#code">0x5EB8A226A06Ee633fEf49804362F2702cEbceA31</a></td></tr><tr><td>VRFLensV2</td><td><a href="https://explorer.zkevm.cronos.org/address/0x4fc5a465d763cEcc0c0b2CeF4e874aCb5B859dD8#code">0x4fc5a465d763cEcc0c0b2CeF4e874aCb5B859dD8</a></td></tr></tbody></table>

* Github reference: <https://github.com/bandprotocol/vrf-worker-v1>

***

### :white\_check\_mark: **Cronos zkEVM** Sepolia **Testnet (Chain-id : `240` )**

Price oracle, supported symbols: $CRO, $ETH and $BTC

* Proxy contract address: To be re-deployed
* Github reference: <https://github.com/bandprotocol/band-std-reference-contracts-solidity>

VRF:

| Contract name        | Contract address                                                                                                                                |
| -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- |
| BridgeImplementation | [0x9cb924A34ac2b5e1fA23522701616D2461BAd851](https://explorer.zkevm.cronos.org/testnet/address/0x9cb924a34ac2b5e1fa23522701616d2461bad851)      |
| ProxyAdmin           | [0x6ca84b102A240586Cb2cbCe9B113E6314984C126](https://explorer.zkevm.cronos.org/testnet/address/0x6ca84b102A240586Cb2cbCe9B113E6314984C126#code) |
| Bridge               | [0x4fc5a465d763cEcc0c0b2CeF4e874aCb5B859dD8](https://explorer.zkevm.cronos.org/testnet/address/0x4fc5a465d763cEcc0c0b2CeF4e874aCb5B859dD8#code) |
| VRFProviderV2        | [0x2b04B94C6fbaC2a4a70fFEC6EFb5bd3521e7D11a](https://explorer.zkevm.cronos.org/testnet/address/0x2b04B94C6fbaC2a4a70fFEC6EFb5bd3521e7D11a#code) |
| VRFLensV2            | [0x83814B902276755cf9c1Fcf7b74633DA49463162](https://explorer.zkevm.cronos.org/testnet/address/0x83814B902276755cf9c1Fcf7b74633DA49463162#code) |

* Github reference: <https://github.com/bandprotocol/vrf-worker-v1>


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs-zkevm.cronos.org/for-developers/developer-tools/band-protocol-oracle.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.